diff --git a/CHANGELOG.md b/CHANGELOG.md
index b8d7b87..f759185 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog
 
+## 0.3.0
+- Add Bitcoin APIs, sandbox actions, and simulator transaction-vector coverage
+
 ## 0.2.0
 - Add Cardano support
 
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 9b762af..eb9cae5 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -53,7 +53,7 @@ npm run test:sim
 
 On Linux x64, the harness downloads and caches the simulator binaries listed in
 `test/simulators.json` under `test/simulators/`, verifies their sha256 hashes,
-and starts the newest listed simulator by default.
+and runs the test matrix against every listed firmware version.
 
 Useful environment variables:
 
@@ -92,8 +92,9 @@ The package is intended as a drop-in TypeScript replacement for the current
 - Public errors must keep the `{ code, message, err? }` shape. New public error
   behavior should go through `src/internal/errors.ts` and match the compatibility
   taxonomy unless there is an explicit reason to extend it.
-- BTC and BIP85 methods remain compatibility stubs in this iteration. Do not
-  document or test them as implemented until their protocol support lands.
+- Bitcoin xpub, address, script config, PSBT, and message-signing support is
+  implemented; keep it aligned with the Rust/WASM reference and simulator
+  vectors. BIP85 methods remain compatibility stubs.
 - Cardano xpub, address, and transaction-signing support is implemented; keep
   it aligned with the Rust/WASM reference behavior and simulator vectors.
 
diff --git a/README.md b/README.md
index 12bd9dd..0e7afc2 100644
--- a/README.md
+++ b/README.md
@@ -3,17 +3,14 @@
 Pure TypeScript library for integrating BitBox02 hardware wallets in browser
 applications.
 
-`@bitboxswiss/bitbox-api` is source-compatible with the current `bitbox-api`
-Rust/WASM package for the implemented surface, but it does not ship WASM and
-does not require a WASM init step.
-
 ## Status
 
 - **Implemented:** WebHID and BitBoxBridge transports, Noise XX pairing,
-  device metadata helpers, Ethereum xpub/address/signing methods, antiklepto,
-  transaction data streaming, EIP-712 typed messages, `ethIdentifyCase()`,
-  and Cardano xpub/address/signing methods.
-- **Stubbed with `code: 'unsupported'`:** BTC and BIP85 methods.
+  device metadata helpers, Bitcoin xpub/address/PSBT/message signing methods,
+  script config registration, Ethereum xpub/address/signing methods,
+  antiklepto, transaction data streaming, EIP-712 typed messages,
+  `ethIdentifyCase()`, and Cardano xpub/address/signing methods.
+- **Stubbed with `code: 'unsupported'`:** BIP85 methods.
 - **Stubbed with `code: 'not-implemented'`:** `showMnemonic()` and
   `changePassword()`.
 
@@ -25,6 +22,8 @@ npm install @bitboxswiss/bitbox-api
 
 `@noble/ciphers`, `@noble/curves`, and `@noble/hashes` are peer dependencies so
 the library does not perturb the crypto dependency graph of wallet/Web3 apps.
+`bitcoinjs-lib`, used to parse and update PSBTs, is installed as a regular
+dependency.
 
 - **npm 7+** installs peer dependencies automatically.
 - **pnpm/yarn** peer handling depends on your package-manager version and
@@ -37,23 +36,6 @@ the library does not perturb the crypto dependency graph of wallet/Web3 apps.
 
 The package is ESM-only.
 
-## Migrating from `bitbox-api`
-
-For currently implemented methods, the intended migration is just the import
-name:
-
-```ts
-import * as bitbox from '@bitboxswiss/bitbox-api';
-```
-
-There is no `init()` call and no WASM loader. Existing Webpack/Vite WASM plugin
-configuration from `bitbox-api` is not needed for this package.
-
-BTC and BIP85 methods are still present in the public type surface for
-compatibility, but currently reject with typed errors as listed in
-[Status](#status). Ethereum, Cardano, and the general device helpers listed
-above are wired through the TypeScript transport.
-
 ## Browser Requirements
 
 - WebHID works in Chromium-based browsers in a secure context, such as HTTPS or
@@ -111,6 +93,48 @@ closed. Reconnect before retrying.
 Call `bb02.close()` when your app is done with the device. `close()` is
 idempotent and invokes the `onClose` callback supplied to the connect function.
 
+## Bitcoin Usage
+
+Bitcoin-family methods accept coin, keypath, script config, and xpub type
+strings. Keypaths can be strings or number arrays.
+
+```ts
+const account = "m/84'/0'/0'";
+const keypath = `${account}/0/0`;
+
+const xpub = await bb02.btcXpub('btc', account, 'xpub', false);
+const address = await bb02.btcAddress(
+  'btc',
+  keypath,
+  { simpleType: 'p2wpkh' },
+  true,
+);
+```
+
+`btcSignPSBT()` accepts and returns a base64-encoded PSBT. Single-signature
+P2WPKH, wrapped P2WPKH, and P2TR script configs are inferred from PSBT key
+origins. Pass `force_script_config` for multisig and policy wallets, which must
+first be registered on the device.
+
+```ts
+const signedPsbt = await bb02.btcSignPSBT(
+  'btc',
+  psbtBase64,
+  undefined,
+  'default',
+);
+
+const messageSignature = await bb02.btcSignMessage(
+  'btc',
+  { scriptConfig: { simpleType: 'p2wpkh' }, keypath },
+  new TextEncoder().encode('hello bitbox'),
+);
+```
+
+The returned PSBT contains the device signatures but is not finalized. Use a
+Bitcoin library to validate, combine, or finalize it as appropriate for the
+wallet.
+
 ## Ethereum Usage
 
 Keypaths can be strings such as `m/44'/60'/0'/0/0` or number arrays. Chain IDs
@@ -289,11 +313,12 @@ Common client-facing codes include:
 - `user-abort` / `bitbox-user-abort`: the user cancelled in the browser or on
   the device.
 - `invalid-type`, `keypath-parse`, `chain-id-too-large`: invalid host inputs.
+- `psbt-parse` and `psbt-*`: malformed PSBTs or unsupported PSBT contents.
+- `btc-sign`: an invalid or incomplete Bitcoin signing exchange.
 - `communication`, `noise`, `noise-config`, `pairing-rejected`: transport,
   pairing, or encrypted-channel failures.
 - `version`: the connected firmware is too old for the requested method.
-- `unsupported` / `not-implemented`: public compatibility methods that are not
-  wired in this TypeScript iteration.
+- `unsupported` / `not-implemented`: methods that are not currently available.
 
 ## Sandbox and Development
 
@@ -307,13 +332,14 @@ make sandbox-dev
 
 Open the printed Vite URL, usually `http://localhost:5173`.
 
-For build, test, simulator, protobuf, and contribution workflow details, see
-[CONTRIBUTING.md](CONTRIBUTING.md).
+The Bitcoin accordion covers xpubs, addresses, script config registration,
+PSBT signing, and message signing. Bitcoin unit tests are part of
+`npm run build && npm test`; the firmware transaction-vector suite runs against
+the simulator matrix with:
 
-## API Compatibility
+```bash
+npm run test:sim -- test/simulator-btc.test.ts
+```
 
-`test/api-snapshot.test.ts` compares the built TypeScript declarations against
-`../bitbox-api-rs/pkg/bitbox_api.d.ts` when the reference checkout is present.
-The guard keeps the public surface drop-in compatible while still allowing
-deliberate source-compatible TypeScript widenings, such as optional close
-callbacks and safer `bigint` chain ID paths.
+For build, test, simulator, protobuf, and contribution workflow details, see
+[CONTRIBUTING.md](CONTRIBUTING.md).
diff --git a/package-lock.json b/package-lock.json
index f16de72..7f5b5fc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,15 +1,17 @@
 {
   "name": "@bitboxswiss/bitbox-api",
-  "version": "0.1.1",
+  "version": "0.3.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@bitboxswiss/bitbox-api",
-      "version": "0.1.1",
+      "version": "0.3.0",
       "license": "Apache-2.0",
       "dependencies": {
-        "@bufbuild/protobuf": "2.11.0"
+        "@bufbuild/protobuf": "2.11.0",
+        "bitcoinjs-lib": "7.0.1",
+        "bs58check": "4.0.0"
       },
       "devDependencies": {
         "@bufbuild/buf": "1.68.3",
@@ -27,6 +29,7 @@
         "eslint": "10.2.1",
         "react": "18.3.1",
         "react-dom": "18.3.1",
+        "tiny-secp256k1": "2.2.4",
         "typescript": "6.0.3",
         "typescript-eslint": "8.59.0",
         "vite": "6.4.2",
@@ -931,7 +934,6 @@
       "version": "1.8.0",
       "resolved": "https://registry.npmjs.org/@noble/hashes/-/hashes-1.8.0.tgz",
       "integrity": "sha512-jCs9ldd7NwzpgXDIf6P3+NrHh9/sD6CQdxHyjQI+h/6rDNo88ypBxxz45UDuZHz9r3tNz7N/VInSVoVdtXEI4A==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": "^14.21.3 || >=16"
@@ -2110,6 +2112,49 @@
         "node": "18 || 20 || >=22"
       }
     },
+    "node_modules/base-x": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/base-x/-/base-x-5.0.1.tgz",
+      "integrity": "sha512-M7uio8Zt++eg3jPj+rHMfCC+IuygQHHCOU+IYsVtik6FWjuYpVt/+MRKcgsAMHh8mMFAwnB+Bs+mTrFiXjMzKg==",
+      "license": "MIT"
+    },
+    "node_modules/bech32": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/bech32/-/bech32-2.0.0.tgz",
+      "integrity": "sha512-LcknSilhIGatDAsY1ak2I8VtGaHNhgMSYVxFrGLXv+xLHytaKZKcaUJJUE7qmBr7h33o5YQwP55pMI0xmkpJwg==",
+      "license": "MIT"
+    },
+    "node_modules/bip174": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/bip174/-/bip174-3.0.0.tgz",
+      "integrity": "sha512-N3vz3rqikLEu0d6yQL8GTrSkpYb35NQKWMR7Hlza0lOj6ZOlvQ3Xr7N9Y+JPebaCVoEUHdBeBSuLxcHr71r+Lw==",
+      "license": "MIT",
+      "dependencies": {
+        "uint8array-tools": "^0.0.9",
+        "varuint-bitcoin": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=18.0.0"
+      }
+    },
+    "node_modules/bitcoinjs-lib": {
+      "version": "7.0.1",
+      "resolved": "https://registry.npmjs.org/bitcoinjs-lib/-/bitcoinjs-lib-7.0.1.tgz",
+      "integrity": "sha512-vwEmpL5Tpj0I0RBdNkcDMXePoaYSTeKY6mL6/l5esbnTs+jGdPDuLp4NY1hSh6Zk5wSgePygZ4Wx5JJao30Pww==",
+      "license": "MIT",
+      "dependencies": {
+        "@noble/hashes": "^1.2.0",
+        "bech32": "^2.0.0",
+        "bip174": "^3.0.0",
+        "bs58check": "^4.0.0",
+        "uint8array-tools": "^0.0.9",
+        "valibot": "^1.2.0",
+        "varuint-bitcoin": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=18.0.0"
+      }
+    },
     "node_modules/brace-expansion": {
       "version": "5.0.5",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-5.0.5.tgz",
@@ -2123,6 +2168,25 @@
         "node": "18 || 20 || >=22"
       }
     },
+    "node_modules/bs58": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/bs58/-/bs58-6.0.0.tgz",
+      "integrity": "sha512-PD0wEnEYg6ijszw/u8s+iI3H17cTymlrwkKhDhPZq+Sokl3AU4htyBFTjAeNAlCCmg0f53g6ih3jATyCKftTfw==",
+      "license": "MIT",
+      "dependencies": {
+        "base-x": "^5.0.0"
+      }
+    },
+    "node_modules/bs58check": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/bs58check/-/bs58check-4.0.0.tgz",
+      "integrity": "sha512-FsGDOnFg9aVI9erdriULkd/JjEWONV/lQE5aYziB5PoBsXRind56lh8doIZIc9X4HoxT5x4bLjMWN1/NB8Zp5g==",
+      "license": "MIT",
+      "dependencies": {
+        "@noble/hashes": "^1.2.0",
+        "bs58": "^6.0.0"
+      }
+    },
     "node_modules/chai": {
       "version": "6.2.2",
       "resolved": "https://registry.npmjs.org/chai/-/chai-6.2.2.tgz",
@@ -3066,6 +3130,29 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/tiny-secp256k1": {
+      "version": "2.2.4",
+      "resolved": "https://registry.npmjs.org/tiny-secp256k1/-/tiny-secp256k1-2.2.4.tgz",
+      "integrity": "sha512-FoDTcToPqZE454Q04hH9o2EhxWsm7pOSpicyHkgTwKhdKWdsTUuqfP5MLq3g+VjAtl2vSx6JpXGdwA2qpYkI0Q==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "uint8array-tools": "0.0.7"
+      },
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
+    "node_modules/tiny-secp256k1/node_modules/uint8array-tools": {
+      "version": "0.0.7",
+      "resolved": "https://registry.npmjs.org/uint8array-tools/-/uint8array-tools-0.0.7.tgz",
+      "integrity": "sha512-vrrNZJiusLWoFWBqz5Y5KMCgP9W9hnjZHzZiZRT8oNAkq3d5Z5Oe76jAvVVSRh4U8GGR90N2X1dWtrhvx6L8UQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
     "node_modules/tinybench": {
       "version": "2.9.0",
       "resolved": "https://registry.npmjs.org/tinybench/-/tinybench-2.9.0.tgz",
@@ -3140,7 +3227,7 @@
       "version": "6.0.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-6.0.3.tgz",
       "integrity": "sha512-y2TvuxSZPDyQakkFRPZHKFm+KKVqIisdg9/CZwm9ftvKXLP8NRWj38/ODjNbr43SsoXqNuAisEf1GdCxqWcdBw==",
-      "dev": true,
+      "devOptional": true,
       "license": "Apache-2.0",
       "bin": {
         "tsc": "bin/tsc",
@@ -3174,6 +3261,15 @@
         "typescript": ">=4.8.4 <6.1.0"
       }
     },
+    "node_modules/uint8array-tools": {
+      "version": "0.0.9",
+      "resolved": "https://registry.npmjs.org/uint8array-tools/-/uint8array-tools-0.0.9.tgz",
+      "integrity": "sha512-9vqDWmoSXOoi+K14zNaf6LBV51Q8MayF0/IiQs3GlygIKUYtog603e6virExkjjFosfJUBI4LhbQK1iq8IG11A==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
     "node_modules/undici-types": {
       "version": "7.19.2",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.19.2.tgz",
@@ -3191,6 +3287,38 @@
         "punycode": "^2.1.0"
       }
     },
+    "node_modules/valibot": {
+      "version": "1.4.2",
+      "resolved": "https://registry.npmjs.org/valibot/-/valibot-1.4.2.tgz",
+      "integrity": "sha512-gjdCvJ6d3RyHAneqxMYMW9QMCwYMb3jpOO0IyHZV1bnRHFBHrX3VkIILt5XYR0WhwHiH7Mty8ovuPZ/O3gamrg==",
+      "license": "MIT",
+      "peerDependencies": {
+        "typescript": ">=5"
+      },
+      "peerDependenciesMeta": {
+        "typescript": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/varuint-bitcoin": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/varuint-bitcoin/-/varuint-bitcoin-2.0.0.tgz",
+      "integrity": "sha512-6QZbU/rHO2ZQYpWFDALCDSRsXbAs1VOEmXAxtbtjLtKuMJ/FQ8YbhfxlaiKv5nklci0M6lZtlZyxo9Q+qNnyog==",
+      "license": "MIT",
+      "dependencies": {
+        "uint8array-tools": "^0.0.8"
+      }
+    },
+    "node_modules/varuint-bitcoin/node_modules/uint8array-tools": {
+      "version": "0.0.8",
+      "resolved": "https://registry.npmjs.org/uint8array-tools/-/uint8array-tools-0.0.8.tgz",
+      "integrity": "sha512-xS6+s8e0Xbx++5/0L+yyexukU7pz//Yg6IHg3BKhXotg1JcYtgxVcUctQ0HxLByiJzpAkNFawz1Nz5Xadzo82g==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
     "node_modules/vite": {
       "version": "6.4.2",
       "resolved": "https://registry.npmjs.org/vite/-/vite-6.4.2.tgz",
diff --git a/package.json b/package.json
index 326d60c..4a710fb 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@bitboxswiss/bitbox-api",
-  "version": "0.2.0",
+  "version": "0.3.0",
   "description": "A pure TypeScript library to interact with BitBox hardware wallets.",
   "license": "Apache-2.0",
   "type": "module",
@@ -52,6 +52,7 @@
     "eslint": "10.2.1",
     "react": "18.3.1",
     "react-dom": "18.3.1",
+    "tiny-secp256k1": "2.2.4",
     "typescript": "6.0.3",
     "typescript-eslint": "8.59.0",
     "vite": "6.4.2",
@@ -61,6 +62,7 @@
     "bitbox",
     "bitbox02",
     "hardware-wallet",
+    "bitcoin",
     "ethereum",
     "typescript"
   ],
@@ -70,7 +72,9 @@
   },
   "homepage": "https://bitbox.swiss/",
   "dependencies": {
-    "@bufbuild/protobuf": "2.11.0"
+    "@bufbuild/protobuf": "2.11.0",
+    "bitcoinjs-lib": "7.0.1",
+    "bs58check": "4.0.0"
   },
   "peerDependencies": {
     "@noble/ciphers": "^1.3.0",
diff --git a/sandbox/src/App.tsx b/sandbox/src/App.tsx
index 5548e06..1cd050f 100644
--- a/sandbox/src/App.tsx
+++ b/sandbox/src/App.tsx
@@ -5,6 +5,7 @@ import * as bitbox from '@bitboxswiss/bitbox-api';
 import './App.css';
 
 import { Cardano } from './Cardano';
+import { Bitcoin } from './Bitcoin';
 import { Ethereum } from './Ethereum';
 import { General } from './General';
 import { ErrorNotification } from './ErrorNotification';
@@ -89,6 +90,9 @@ function App() {
         <Accordion opened title="General">
           <General bb02={bb02} />
         </Accordion>
+        <Accordion title="Bitcoin">
+          <Bitcoin bb02={bb02} />
+        </Accordion>
         {bb02.ethSupported() && (
           <Accordion title="Ethereum">
             <Ethereum bb02={bb02} />
diff --git a/sandbox/src/Bitcoin.tsx b/sandbox/src/Bitcoin.tsx
new file mode 100644
index 0000000..f36d19d
--- /dev/null
+++ b/sandbox/src/Bitcoin.tsx
@@ -0,0 +1,495 @@
+// SPDX-License-Identifier: Apache-2.0
+
+import { type FormEvent, useState } from 'react';
+import * as bitbox from '@bitboxswiss/bitbox-api';
+
+import { ErrorNotification } from './ErrorNotification';
+import { ResultBlock, formatResult } from './form-utils';
+
+type Props = { bb02: bitbox.PairedBitBox };
+
+const BTC_COINS: bitbox.BtcCoin[] = ['btc', 'tbtc', 'ltc', 'tltc', 'rbtc'];
+const XPUB_TYPES: bitbox.XPubType[] = [
+  'tpub', 'xpub', 'ypub', 'zpub', 'vpub', 'upub', 'Vpub', 'Zpub', 'Upub', 'Ypub',
+];
+const SIMPLE_TYPES: bitbox.BtcSimpleType[] = ['p2wpkhP2sh', 'p2wpkh', 'p2tr'];
+
+function ErrorView({
+  error,
+  clear,
+}: {
+  error: bitbox.Error | undefined;
+  clear: () => void;
+}) {
+  return error === undefined
+    ? null
+    : <ErrorNotification message={error.message} code={error.code} onClose={clear} />;
+}
+
+function CoinSelect({
+  coin,
+  setCoin,
+}: {
+  coin: bitbox.BtcCoin;
+  setCoin: (coin: bitbox.BtcCoin) => void;
+}) {
+  return (
+    <label>
+      Coin
+      <select value={coin} onChange={event => setCoin(event.target.value as bitbox.BtcCoin)}>
+        {BTC_COINS.map(option => (
+          <option key={option} value={option}>{option}</option>
+        ))}
+      </select>
+    </label>
+  );
+}
+
+function BtcXPub({ bb02 }: Props) {
+  const [coin, setCoin] = useState<bitbox.BtcCoin>('btc');
+  const [keypath, setKeypath] = useState("m/84'/0'/0'");
+  const [xpubType, setXpubType] = useState<bitbox.XPubType>('xpub');
+  const [display, setDisplay] = useState(true);
+  const [result, setResult] = useState('');
+  const [running, setRunning] = useState(false);
+  const [error, setError] = useState<bitbox.Error>();
+
+  const submit = async (event: FormEvent) => {
+    event.preventDefault();
+    setRunning(true);
+    setResult('');
+    setError(undefined);
+    try {
+      setResult(await bb02.btcXpub(coin, keypath, xpubType, display));
+    } catch (err) {
+      setError(bitbox.ensureError(err));
+    } finally {
+      setRunning(false);
+    }
+  };
+
+  return (
+    <div>
+      <h4>XPub</h4>
+      <form className="verticalForm" onSubmit={submit}>
+        <CoinSelect coin={coin} setCoin={setCoin} />
+        <label>
+          Keypath
+          <input value={keypath} onChange={event => setKeypath(event.target.value)} />
+        </label>
+        <label>
+          XPub type
+          <select
+            value={xpubType}
+            onChange={event => setXpubType(event.target.value as bitbox.XPubType)}
+          >
+            {XPUB_TYPES.map(option => (
+              <option key={option} value={option}>{option}</option>
+            ))}
+          </select>
+        </label>
+        <label>
+          Display on device
+          <input
+            type="checkbox"
+            checked={display}
+            onChange={event => setDisplay(event.target.checked)}
+          />
+        </label>
+        <button type="submit" disabled={running}>Get XPub</button>
+        <ResultBlock value={result} />
+        <ErrorView error={error} clear={() => setError(undefined)} />
+      </form>
+    </div>
+  );
+}
+
+function BtcXPubs({ bb02 }: Props) {
+  const [coin, setCoin] = useState<bitbox.BtcCoin>('btc');
+  const [keypaths, setKeypaths] = useState(
+    `["m/49'/0'/0'", "m/84'/0'/0'", "m/86'/0'/0'"]`,
+  );
+  const [xpubType, setXpubType] = useState<bitbox.BtcXPubsType>('xpub');
+  const [result, setResult] = useState<bitbox.BtcXpubs>();
+  const [running, setRunning] = useState(false);
+  const [error, setError] = useState<bitbox.Error>();
+
+  const submit = async (event: FormEvent) => {
+    event.preventDefault();
+    setRunning(true);
+    setResult(undefined);
+    setError(undefined);
+    try {
+      setResult(await bb02.btcXpubs(
+        coin,
+        JSON.parse(keypaths) as bitbox.Keypath[],
+        xpubType,
+      ));
+    } catch (err) {
+      setError(bitbox.ensureError(err));
+    } finally {
+      setRunning(false);
+    }
+  };
+
+  return (
+    <div>
+      <h4>Multiple XPubs</h4>
+      <form className="verticalForm" onSubmit={submit}>
+        <CoinSelect coin={coin} setCoin={setCoin} />
+        <label>Keypaths</label>
+        <textarea value={keypaths} onChange={event => setKeypaths(event.target.value)} rows={5} />
+        <label>
+          XPub type
+          <select
+            value={xpubType}
+            onChange={event => setXpubType(event.target.value as bitbox.BtcXPubsType)}
+          >
+            <option value="tpub">tpub</option>
+            <option value="xpub">xpub</option>
+          </select>
+        </label>
+        <button type="submit" disabled={running}>Get XPubs</button>
+        <ResultBlock value={formatResult(result)} />
+        <ErrorView error={error} clear={() => setError(undefined)} />
+      </form>
+    </div>
+  );
+}
+
+function BtcAddressSimple({ bb02 }: Props) {
+  const [coin, setCoin] = useState<bitbox.BtcCoin>('btc');
+  const [simpleType, setSimpleType] = useState<bitbox.BtcSimpleType>('p2wpkhP2sh');
+  const [display, setDisplay] = useState(true);
+  const [isChange, setIsChange] = useState(false);
+  const [addressIndex, setAddressIndex] = useState(0);
+  const [account, setAccount] = useState(0);
+  const [result, setResult] = useState('');
+  const [running, setRunning] = useState(false);
+  const [error, setError] = useState<bitbox.Error>();
+
+  const coinType = coin === 'btc' ? 0 : coin === 'ltc' ? 2 : 1;
+  const purpose = simpleType === 'p2wpkhP2sh' ? 49 : simpleType === 'p2wpkh' ? 84 : 86;
+  const keypath = `m/${purpose}'/${coinType}'/${account}'/${isChange ? 1 : 0}/${addressIndex}`;
+
+  const submit = async (event: FormEvent) => {
+    event.preventDefault();
+    setRunning(true);
+    setResult('');
+    setError(undefined);
+    try {
+      setResult(await bb02.btcAddress(coin, keypath, { simpleType }, display));
+    } catch (err) {
+      setError(bitbox.ensureError(err));
+    } finally {
+      setRunning(false);
+    }
+  };
+
+  return (
+    <div>
+      <h4>Address</h4>
+      <form className="verticalForm" onSubmit={submit}>
+        <CoinSelect coin={coin} setCoin={setCoin} />
+        <label>
+          Simple type
+          <select
+            value={simpleType}
+            onChange={event => setSimpleType(event.target.value as bitbox.BtcSimpleType)}
+          >
+            {SIMPLE_TYPES.map(option => (
+              <option
+                key={option}
+                value={option}
+                disabled={option === 'p2tr' && (coin === 'ltc' || coin === 'tltc')}
+              >
+                {option}
+              </option>
+            ))}
+          </select>
+        </label>
+        <label>
+          Account
+          <input
+            type="number"
+            min="0"
+            value={account}
+            onChange={event => setAccount(Number(event.target.value))}
+          />
+        </label>
+        <label>
+          Change
+          <input
+            type="checkbox"
+            checked={isChange}
+            onChange={event => setIsChange(event.target.checked)}
+          />
+        </label>
+        <label>
+          Address index
+          <input
+            type="number"
+            min="0"
+            value={addressIndex}
+            onChange={event => setAddressIndex(Number(event.target.value))}
+          />
+        </label>
+        <label>
+          Display on device
+          <input
+            type="checkbox"
+            checked={display}
+            onChange={event => setDisplay(event.target.checked)}
+          />
+        </label>
+        <p>Keypath: <code>{keypath}</code></p>
+        <button type="submit" disabled={running}>Get address</button>
+        <ResultBlock value={result} />
+        <ErrorView error={error} clear={() => setError(undefined)} />
+      </form>
+    </div>
+  );
+}
+
+function BtcSignPSBT({ bb02 }: Props) {
+  const [coin, setCoin] = useState<bitbox.BtcCoin>('btc');
+  const [psbt, setPSBT] = useState('');
+  const [formatUnit, setFormatUnit] = useState<bitbox.BtcFormatUnit>('default');
+  const [result, setResult] = useState('');
+  const [running, setRunning] = useState(false);
+  const [error, setError] = useState<bitbox.Error>();
+
+  const submit = async (event: FormEvent) => {
+    event.preventDefault();
+    setRunning(true);
+    setResult('');
+    setError(undefined);
+    try {
+      setResult(await bb02.btcSignPSBT(coin, psbt, undefined, formatUnit));
+    } catch (err) {
+      setError(bitbox.ensureError(err));
+    } finally {
+      setRunning(false);
+    }
+  };
+
+  return (
+    <div>
+      <h4>Sign PSBT</h4>
+      <form className="verticalForm" onSubmit={submit}>
+        <CoinSelect coin={coin} setCoin={setCoin} />
+        <label>
+          Format unit
+          <select
+            value={formatUnit}
+            onChange={event => setFormatUnit(event.target.value as bitbox.BtcFormatUnit)}
+          >
+            <option value="default">default</option>
+            <option value="sat">sat</option>
+          </select>
+        </label>
+        <label>PSBT</label>
+        <textarea
+          value={psbt}
+          onChange={event => setPSBT(event.target.value)}
+          placeholder="base64 PSBT"
+          rows={8}
+        />
+        <button type="submit" disabled={running}>Sign PSBT</button>
+        <ResultBlock value={result} />
+        <ErrorView error={error} clear={() => setError(undefined)} />
+      </form>
+    </div>
+  );
+}
+
+function BtcSignMessage({ bb02 }: Props) {
+  const [simpleType, setSimpleType] = useState<bitbox.BtcSimpleType>('p2wpkhP2sh');
+  const [keypath, setKeypath] = useState("m/49'/0'/0'/0/0");
+  const [message, setMessage] = useState('message');
+  const [result, setResult] = useState<bitbox.BtcSignMessageSignature>();
+  const [running, setRunning] = useState(false);
+  const [error, setError] = useState<bitbox.Error>();
+
+  const submit = async (event: FormEvent) => {
+    event.preventDefault();
+    setRunning(true);
+    setResult(undefined);
+    setError(undefined);
+    try {
+      setResult(await bb02.btcSignMessage(
+        'btc',
+        { scriptConfig: { simpleType }, keypath },
+        new TextEncoder().encode(message),
+      ));
+    } catch (err) {
+      setError(bitbox.ensureError(err));
+    } finally {
+      setRunning(false);
+    }
+  };
+
+  return (
+    <div>
+      <h4>Sign message</h4>
+      <form className="verticalForm" onSubmit={submit}>
+        <label>
+          Simple type
+          <select
+            value={simpleType}
+            onChange={event => setSimpleType(event.target.value as bitbox.BtcSimpleType)}
+          >
+            <option value="p2wpkhP2sh">p2wpkhP2sh</option>
+            <option value="p2wpkh">p2wpkh</option>
+          </select>
+        </label>
+        <label>
+          Keypath
+          <input value={keypath} onChange={event => setKeypath(event.target.value)} />
+        </label>
+        <label>Message</label>
+        <textarea value={message} onChange={event => setMessage(event.target.value)} rows={4} />
+        <button type="submit" disabled={running}>Sign message</button>
+        <ResultBlock value={formatResult(result)} />
+        <ErrorView error={error} clear={() => setError(undefined)} />
+      </form>
+    </div>
+  );
+}
+
+function BtcMultisigAddress({ bb02 }: Props) {
+  const [scriptType, setScriptType] = useState<bitbox.BtcMultisigScriptType>('p2wsh');
+  const [result, setResult] = useState('');
+  const [running, setRunning] = useState(false);
+  const [error, setError] = useState<bitbox.Error>();
+  const coin: bitbox.BtcCoin = 'tbtc';
+  const keypath = "m/48'/1'/0'/2'";
+  const otherXpub = 'tpubDFgycCkexSxkdZfeyaasDHityE97kiYM1BeCNoivDHvydGugKtoNobt4vEX6YSHNPy2cqmWQHKjKxciJuocepsGPGxcDZVmiMBnxgA1JKQk';
+
+  const submit = async (event: FormEvent) => {
+    event.preventDefault();
+    setRunning(true);
+    setResult('');
+    setError(undefined);
+    try {
+      const ourXpub = await bb02.btcXpub(coin, keypath, 'tpub', false);
+      const config: bitbox.BtcScriptConfig = {
+        multisig: {
+          threshold: 1,
+          xpubs: [ourXpub, otherXpub],
+          ourXpubIndex: 0,
+          scriptType,
+        },
+      };
+      if (!await bb02.btcIsScriptConfigRegistered(coin, config, keypath)) {
+        await bb02.btcRegisterScriptConfig(
+          coin,
+          config,
+          keypath,
+          'autoXpubTpub',
+          undefined,
+        );
+      }
+      setResult(await bb02.btcAddress(coin, `${keypath}/0/10`, config, true));
+    } catch (err) {
+      setError(bitbox.ensureError(err));
+    } finally {
+      setRunning(false);
+    }
+  };
+
+  return (
+    <div>
+      <h4>Multisig address</h4>
+      <form className="verticalForm" onSubmit={submit}>
+        <label>
+          Script type
+          <select
+            value={scriptType}
+            onChange={event => setScriptType(
+              event.target.value as bitbox.BtcMultisigScriptType,
+            )}
+          >
+            <option value="p2wsh">p2wsh</option>
+            <option value="p2wshP2sh">p2wshP2sh</option>
+          </select>
+        </label>
+        <p>Account keypath: <code>{keypath}</code></p>
+        <button type="submit" disabled={running}>Get multisig address</button>
+        <ResultBlock value={result} />
+        <ErrorView error={error} clear={() => setError(undefined)} />
+      </form>
+    </div>
+  );
+}
+
+function BtcPolicyAddress({ bb02 }: Props) {
+  const [result, setResult] = useState('');
+  const [running, setRunning] = useState(false);
+  const [error, setError] = useState<bitbox.Error>();
+  const coin: bitbox.BtcCoin = 'tbtc';
+  const policy = 'wsh(andor(pk(@0/**),older(12960),pk(@1/**)))';
+  const keypath = "m/48'/1'/0'/3'";
+  const otherXpub = 'tpubDFgycCkexSxkdZfeyaasDHityE97kiYM1BeCNoivDHvydGugKtoNobt4vEX6YSHNPy2cqmWQHKjKxciJuocepsGPGxcDZVmiMBnxgA1JKQk';
+
+  const submit = async (event: FormEvent) => {
+    event.preventDefault();
+    setRunning(true);
+    setResult('');
+    setError(undefined);
+    try {
+      const rootFingerprint = await bb02.rootFingerprint();
+      const ourXpub = await bb02.btcXpub(coin, keypath, 'xpub', false);
+      const config: bitbox.BtcScriptConfig = {
+        policy: {
+          policy,
+          keys: [
+            { rootFingerprint, keypath, xpub: ourXpub },
+            { xpub: otherXpub },
+          ],
+        },
+      };
+      if (!await bb02.btcIsScriptConfigRegistered(coin, config, undefined)) {
+        await bb02.btcRegisterScriptConfig(
+          coin,
+          config,
+          undefined,
+          'autoXpubTpub',
+          undefined,
+        );
+      }
+      setResult(await bb02.btcAddress(coin, `${keypath}/0/10`, config, true));
+    } catch (err) {
+      setError(bitbox.ensureError(err));
+    } finally {
+      setRunning(false);
+    }
+  };
+
+  return (
+    <div>
+      <h4>Policy address</h4>
+      <form className="verticalForm" onSubmit={submit}>
+        <p>Policy: <code>{policy}</code></p>
+        <p>Account keypath: <code>{keypath}</code></p>
+        <button type="submit" disabled={running}>Get policy address</button>
+        <ResultBlock value={result} />
+        <ErrorView error={error} clear={() => setError(undefined)} />
+      </form>
+    </div>
+  );
+}
+
+export function Bitcoin({ bb02 }: Props) {
+  return (
+    <>
+      <div className="action"><BtcXPub bb02={bb02} /></div>
+      <div className="action"><BtcXPubs bb02={bb02} /></div>
+      <div className="action"><BtcAddressSimple bb02={bb02} /></div>
+      <div className="action"><BtcSignPSBT bb02={bb02} /></div>
+      <div className="action"><BtcSignMessage bb02={bb02} /></div>
+      <div className="action"><BtcMultisigAddress bb02={bb02} /></div>
+      <div className="action"><BtcPolicyAddress bb02={bb02} /></div>
+    </>
+  );
+}
diff --git a/src/index.ts b/src/index.ts
index 9e17d71..c8d5cd1 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -32,6 +32,15 @@ import {
   ethSignTypedMessage as ethSignTypedMessageImpl,
   ethXpub as ethXpubImpl,
 } from './internal/eth/methods.js';
+import {
+  btcAddress as btcAddressImpl,
+  btcIsScriptConfigRegistered as btcIsScriptConfigRegisteredImpl,
+  btcRegisterScriptConfig as btcRegisterScriptConfigImpl,
+  btcSignMessage as btcSignMessageImpl,
+  btcSignPSBT as btcSignPSBTImpl,
+  btcXpub as btcXpubImpl,
+  btcXpubs as btcXpubsImpl,
+} from './internal/btc/methods.js';
 import { isMultiEdition, type HwwCommunication, type Info } from './internal/hww.js';
 import type { NoiseConfig } from './internal/noise-config.js';
 import {
@@ -597,79 +606,105 @@ export class PairedBitBox {
     throw notImplementedError('changePassword');
   }
 
-  /** Compatibility stub: Bitcoin support is not implemented in this TypeScript iteration. */
+  /** Retrieves a Bitcoin-family account xpub. */
   async btcXpub(
-    _coin: BtcCoin,
-    _keypath: Keypath,
-    _xpub_type: XPubType,
-    _display: boolean,
+    coin: BtcCoin,
+    keypath: Keypath,
+    xpub_type: XPubType,
+    display: boolean,
   ): Promise<string> {
-    this.#requireOpen('btcXpub');
-    throw unsupportedError('btcXpub');
+    return this.#runExclusive('btcXpub', open =>
+      btcXpubImpl(open.channel, coin, keypath, xpub_type, display),
+    );
   }
 
-  /** Compatibility stub: Bitcoin support is not implemented in this TypeScript iteration. */
+  /** Retrieves multiple Bitcoin-family xpubs at once. */
   async btcXpubs(
-    _coin: BtcCoin,
-    _keypaths: Keypath[],
-    _xpub_type: BtcXPubsType,
+    coin: BtcCoin,
+    keypaths: Keypath[],
+    xpub_type: BtcXPubsType,
   ): Promise<BtcXpubs> {
-    this.#requireOpen('btcXpubs');
-    throw unsupportedError('btcXpubs');
+    return this.#runExclusive('btcXpubs', open =>
+      btcXpubsImpl(open.channel, open.info, coin, keypaths, xpub_type),
+    );
   }
 
-  /** Compatibility stub: Bitcoin support is not implemented in this TypeScript iteration. */
+  /** Checks whether a multisig or policy script config is registered. */
   async btcIsScriptConfigRegistered(
-    _coin: BtcCoin,
-    _script_config: BtcScriptConfig,
-    _keypath_account?: Keypath,
+    coin: BtcCoin,
+    script_config: BtcScriptConfig,
+    keypath_account?: Keypath,
   ): Promise<boolean> {
-    this.#requireOpen('btcIsScriptConfigRegistered');
-    throw unsupportedError('btcIsScriptConfigRegistered');
+    return this.#runExclusive('btcIsScriptConfigRegistered', open =>
+      btcIsScriptConfigRegisteredImpl(
+        open.channel,
+        coin,
+        script_config,
+        keypath_account,
+      ),
+    );
   }
 
-  /** Compatibility stub: Bitcoin support is not implemented in this TypeScript iteration. */
+  /** Registers a multisig or policy script config on the device. */
   async btcRegisterScriptConfig(
-    _coin: BtcCoin,
-    _script_config: BtcScriptConfig,
-    _keypath_account: Keypath | undefined,
-    _xpub_type: BtcRegisterXPubType,
-    _name?: string,
+    coin: BtcCoin,
+    script_config: BtcScriptConfig,
+    keypath_account: Keypath | undefined,
+    xpub_type: BtcRegisterXPubType,
+    name?: string,
   ): Promise<void> {
-    this.#requireOpen('btcRegisterScriptConfig');
-    throw unsupportedError('btcRegisterScriptConfig');
+    return this.#runExclusive('btcRegisterScriptConfig', open =>
+      btcRegisterScriptConfigImpl(
+        open.channel,
+        coin,
+        script_config,
+        keypath_account,
+        xpub_type,
+        name,
+      ),
+    );
   }
 
-  /** Compatibility stub: Bitcoin support is not implemented in this TypeScript iteration. */
+  /** Retrieves a Bitcoin-family address at the provided keypath. */
   async btcAddress(
-    _coin: BtcCoin,
-    _keypath: Keypath,
-    _script_config: BtcScriptConfig,
-    _display: boolean,
+    coin: BtcCoin,
+    keypath: Keypath,
+    script_config: BtcScriptConfig,
+    display: boolean,
   ): Promise<string> {
-    this.#requireOpen('btcAddress');
-    throw unsupportedError('btcAddress');
+    return this.#runExclusive('btcAddress', open =>
+      btcAddressImpl(open.channel, coin, keypath, script_config, display),
+    );
   }
 
-  /** Compatibility stub: Bitcoin support is not implemented in this TypeScript iteration. */
+  /** Signs a base64-encoded PSBT and returns the updated PSBT. */
   async btcSignPSBT(
-    _coin: BtcCoin,
-    _psbt: string,
-    _force_script_config: BtcScriptConfigWithKeypath | undefined,
-    _format_unit: BtcFormatUnit,
+    coin: BtcCoin,
+    psbt: string,
+    force_script_config: BtcScriptConfigWithKeypath | undefined,
+    format_unit: BtcFormatUnit,
   ): Promise<string> {
-    this.#requireOpen('btcSignPSBT');
-    throw unsupportedError('btcSignPSBT');
+    return this.#runExclusive('btcSignPSBT', open =>
+      btcSignPSBTImpl(
+        open.channel,
+        open.info,
+        coin,
+        psbt,
+        force_script_config,
+        format_unit,
+      ),
+    );
   }
 
-  /** Compatibility stub: Bitcoin support is not implemented in this TypeScript iteration. */
+  /** Signs a message using the provided Bitcoin script config. */
   async btcSignMessage(
-    _coin: BtcCoin,
-    _script_config: BtcScriptConfigWithKeypath,
-    _msg: Uint8Array,
+    coin: BtcCoin,
+    script_config: BtcScriptConfigWithKeypath,
+    msg: Uint8Array,
   ): Promise<BtcSignMessageSignature> {
-    this.#requireOpen('btcSignMessage');
-    throw unsupportedError('btcSignMessage');
+    return this.#runExclusive('btcSignMessage', open =>
+      btcSignMessageImpl(open.channel, open.info, coin, script_config, msg),
+    );
   }
 
   /** Does this device support ETH functionality? Currently this means BitBox02 Multi or Nova Multi. */
diff --git a/src/internal/btc/config.ts b/src/internal/btc/config.ts
new file mode 100644
index 0000000..3d94228
--- /dev/null
+++ b/src/internal/btc/config.ts
@@ -0,0 +1,264 @@
+// SPDX-License-Identifier: Apache-2.0
+
+import { create } from '@bufbuild/protobuf';
+import { secp256k1 } from '@noble/curves/secp256k1';
+import bs58check from 'bs58check';
+import type {
+  BtcCoin,
+  BtcFormatUnit,
+  BtcRegisterXPubType,
+  BtcScriptConfig,
+  BtcScriptConfigWithKeypath,
+  BtcXPubsType,
+  Keypath,
+  XPubType,
+} from '../../index.js';
+import {
+  BTCCoin,
+  BTCPubRequest_XPubType,
+  BTCRegisterScriptConfigRequest_XPubType,
+  BTCScriptConfig_MultisigSchema,
+  BTCScriptConfig_Multisig_ScriptType,
+  BTCScriptConfig_PolicySchema,
+  BTCScriptConfig_SimpleType,
+  BTCScriptConfigSchema,
+  BTCScriptConfigWithKeypathSchema,
+  BTCSignInitRequest_FormatUnit,
+  BTCXpubsRequest_XPubType,
+  type BTCScriptConfig,
+  type BTCScriptConfigWithKeypath,
+} from '../../proto/gen/btc_pb.js';
+import {
+  KeyOriginInfoSchema,
+  XPubSchema,
+} from '../../proto/gen/common_pb.js';
+import { invalidTypeError } from '../errors.js';
+import { parseKeypath } from '../keypath.js';
+import { hexToBytes, validateUint32 } from '../utils.js';
+
+const XPUB_MAINNET_VERSION = 0x0488b21e;
+const XPUB_TESTNET_VERSION = 0x043587cf;
+
+function invalid(detail: string): never {
+  throw invalidTypeError(detail);
+}
+
+export function mapCoin(coin: BtcCoin): BTCCoin {
+  switch (coin) {
+    case 'btc': return BTCCoin.BTC;
+    case 'tbtc': return BTCCoin.TBTC;
+    case 'ltc': return BTCCoin.LTC;
+    case 'tltc': return BTCCoin.TLTC;
+    case 'rbtc': return BTCCoin.RBTC;
+    default: return invalid('wrong type for BtcCoin');
+  }
+}
+
+export function mapXpubType(xpubType: XPubType): BTCPubRequest_XPubType {
+  switch (xpubType) {
+    case 'tpub': return BTCPubRequest_XPubType.TPUB;
+    case 'xpub': return BTCPubRequest_XPubType.XPUB;
+    case 'ypub': return BTCPubRequest_XPubType.YPUB;
+    case 'zpub': return BTCPubRequest_XPubType.ZPUB;
+    case 'vpub': return BTCPubRequest_XPubType.VPUB;
+    case 'upub': return BTCPubRequest_XPubType.UPUB;
+    case 'Vpub': return BTCPubRequest_XPubType.CAPITAL_VPUB;
+    case 'Zpub': return BTCPubRequest_XPubType.CAPITAL_ZPUB;
+    case 'Upub': return BTCPubRequest_XPubType.CAPITAL_UPUB;
+    case 'Ypub': return BTCPubRequest_XPubType.CAPITAL_YPUB;
+    default: return invalid('wrong type for XPubType');
+  }
+}
+
+export function mapXpubsType(xpubType: BtcXPubsType): BTCXpubsRequest_XPubType {
+  switch (xpubType) {
+    case 'xpub': return BTCXpubsRequest_XPubType.XPUB;
+    case 'tpub': return BTCXpubsRequest_XPubType.TPUB;
+    default: return invalid('wrong type for BTCXPubsType');
+  }
+}
+
+export function mapFormatUnit(formatUnit: BtcFormatUnit): BTCSignInitRequest_FormatUnit {
+  switch (formatUnit) {
+    case 'default': return BTCSignInitRequest_FormatUnit.DEFAULT;
+    case 'sat': return BTCSignInitRequest_FormatUnit.SAT;
+    default: return invalid('wrong type for BtcFormatUnit');
+  }
+}
+
+export function mapRegisterXpubType(
+  xpubType: BtcRegisterXPubType,
+): BTCRegisterScriptConfigRequest_XPubType {
+  switch (xpubType) {
+    case 'autoElectrum': return BTCRegisterScriptConfigRequest_XPubType.AUTO_ELECTRUM;
+    case 'autoXpubTpub': return BTCRegisterScriptConfigRequest_XPubType.AUTO_XPUB_TPUB;
+    default: return invalid('wrong type for BtcRegisterXPubType');
+  }
+}
+
+// bitcoinjs-lib does not expose BIP32 parsing, while the firmware protobuf needs
+// the individual fields rather than the Base58Check-encoded xpub.
+function parseXpub(value: unknown) {
+  if (typeof value !== 'string') {
+    return invalid('wrong type for BtcScriptConfig');
+  }
+  let decoded: Uint8Array;
+  try {
+    decoded = bs58check.decode(value);
+  } catch {
+    return invalid('wrong type for BtcScriptConfig');
+  }
+  if (decoded.length !== 78) {
+    return invalid('wrong type for BtcScriptConfig');
+  }
+  const view = new DataView(decoded.buffer, decoded.byteOffset, decoded.byteLength);
+  const version = view.getUint32(0, false);
+  const publicKey = decoded.slice(45, 78);
+  if (version !== XPUB_MAINNET_VERSION && version !== XPUB_TESTNET_VERSION) {
+    return invalid('wrong type for BtcScriptConfig');
+  }
+  try {
+    secp256k1.ProjectivePoint.fromHex(publicKey);
+  } catch {
+    return invalid('wrong type for BtcScriptConfig');
+  }
+  return create(XPubSchema, {
+    depth: decoded.slice(4, 5),
+    parentFingerprint: decoded.slice(5, 9),
+    childNum: view.getUint32(9, false),
+    chainCode: decoded.slice(13, 45),
+    publicKey,
+  });
+}
+
+function parseRootFingerprint(value: unknown): Uint8Array {
+  if (value === undefined) {
+    return new Uint8Array();
+  }
+  if (typeof value !== 'string' || !/^[0-9a-fA-F]{8}$/.test(value)) {
+    return invalid('wrong type for BtcScriptConfig');
+  }
+  return hexToBytes(value);
+}
+
+function parseOptionalKeypath(value: unknown): number[] {
+  if (value === undefined) {
+    return [];
+  }
+  if (typeof value !== 'string' && !Array.isArray(value)) {
+    return invalid('wrong type for BtcScriptConfig');
+  }
+  return parseKeypath(value as Keypath);
+}
+
+function mapSimpleType(value: unknown): BTCScriptConfig_SimpleType {
+  switch (value) {
+    case 'p2wpkhP2sh': return BTCScriptConfig_SimpleType.P2WPKH_P2SH;
+    case 'p2wpkh': return BTCScriptConfig_SimpleType.P2WPKH;
+    case 'p2tr': return BTCScriptConfig_SimpleType.P2TR;
+    default: return invalid('wrong type for BtcScriptConfig');
+  }
+}
+
+export function mapScriptConfig(config: BtcScriptConfig): BTCScriptConfig {
+  if (config === null || typeof config !== 'object') {
+    return invalid('wrong type for BtcScriptConfig');
+  }
+  const value = config as unknown as Record<string, unknown>;
+  if ('simpleType' in value) {
+    return create(BTCScriptConfigSchema, {
+      config: { case: 'simpleType', value: mapSimpleType(value.simpleType) },
+    });
+  }
+  if ('multisig' in value) {
+    const multisig = value.multisig;
+    if (multisig === null || typeof multisig !== 'object') {
+      return invalid('wrong type for BtcScriptConfig');
+    }
+    const ms = multisig as Record<string, unknown>;
+    if (!Array.isArray(ms.xpubs)) {
+      return invalid('wrong type for BtcScriptConfig');
+    }
+    let scriptType: BTCScriptConfig_Multisig_ScriptType;
+    switch (ms.scriptType) {
+      case 'p2wsh': scriptType = BTCScriptConfig_Multisig_ScriptType.P2WSH; break;
+      case 'p2wshP2sh': scriptType = BTCScriptConfig_Multisig_ScriptType.P2WSH_P2SH; break;
+      default: return invalid('wrong type for BtcScriptConfig');
+    }
+    return create(BTCScriptConfigSchema, {
+      config: {
+        case: 'multisig',
+        value: create(BTCScriptConfig_MultisigSchema, {
+          threshold: validateUint32(
+            ms.threshold as number,
+            'wrong type for BtcScriptConfig',
+          ),
+          xpubs: ms.xpubs.map(parseXpub),
+          ourXpubIndex: validateUint32(
+            ms.ourXpubIndex as number,
+            'wrong type for BtcScriptConfig',
+          ),
+          scriptType,
+        }),
+      },
+    });
+  }
+  if ('policy' in value) {
+    const policy = value.policy;
+    if (policy === null || typeof policy !== 'object') {
+      return invalid('wrong type for BtcScriptConfig');
+    }
+    const p = policy as Record<string, unknown>;
+    if (typeof p.policy !== 'string' || !Array.isArray(p.keys)) {
+      return invalid('wrong type for BtcScriptConfig');
+    }
+    return create(BTCScriptConfigSchema, {
+      config: {
+        case: 'policy',
+        value: create(BTCScriptConfig_PolicySchema, {
+          policy: p.policy,
+          keys: p.keys.map((key) => {
+            if (key === null || typeof key !== 'object') {
+              return invalid('wrong type for BtcScriptConfig');
+            }
+            const k = key as Record<string, unknown>;
+            return create(KeyOriginInfoSchema, {
+              rootFingerprint: parseRootFingerprint(k.rootFingerprint),
+              keypath: parseOptionalKeypath(k.keypath),
+              xpub: parseXpub(k.xpub),
+            });
+          }),
+        }),
+      },
+    });
+  }
+  return invalid('wrong type for BtcScriptConfig');
+}
+
+export function mapScriptConfigWithKeypath(
+  value: BtcScriptConfigWithKeypath,
+): BTCScriptConfigWithKeypath {
+  if (value === null || typeof value !== 'object') {
+    return invalid('wrong type for BtcScriptConfigWithKeypath');
+  }
+  const input = value as unknown as Record<string, unknown>;
+  if (typeof input.keypath !== 'string' && !Array.isArray(input.keypath)) {
+    return invalid('wrong type for BtcScriptConfigWithKeypath');
+  }
+  return create(BTCScriptConfigWithKeypathSchema, {
+    scriptConfig: mapScriptConfig(input.scriptConfig as BtcScriptConfig),
+    keypath: parseKeypath(input.keypath as Keypath),
+  });
+}
+
+export function makeSimpleScriptConfigWithKeypath(
+  simpleType: BTCScriptConfig_SimpleType,
+  keypath: number[],
+): BTCScriptConfigWithKeypath {
+  return create(BTCScriptConfigWithKeypathSchema, {
+    scriptConfig: create(BTCScriptConfigSchema, {
+      config: { case: 'simpleType', value: simpleType },
+    }),
+    keypath,
+  });
+}
diff --git a/src/internal/btc/methods.ts b/src/internal/btc/methods.ts
new file mode 100644
index 0000000..4e2defe
--- /dev/null
+++ b/src/internal/btc/methods.ts
@@ -0,0 +1,494 @@
+// SPDX-License-Identifier: Apache-2.0
+
+import { create } from '@bufbuild/protobuf';
+import type {
+  BtcCoin,
+  BtcFormatUnit,
+  BtcRegisterXPubType,
+  BtcScriptConfig,
+  BtcScriptConfigWithKeypath,
+  BtcSignMessageSignature,
+  BtcXPubsType,
+  Keypath,
+  XPubType,
+} from '../../index.js';
+import {
+  AntiKleptoHostNonceCommitmentSchema,
+  AntiKleptoSignatureRequestSchema,
+} from '../../proto/gen/antiklepto_pb.js';
+import {
+  BTCIsScriptConfigRegisteredRequestSchema,
+  type BTCCoin,
+  BTCOutputType,
+  BTCPrevTxInitRequestSchema,
+  BTCPrevTxInputRequestSchema,
+  BTCPrevTxOutputRequestSchema,
+  BTCPubRequestSchema,
+  BTCRegisterScriptConfigRequestSchema,
+  BTCScriptConfigRegistrationSchema,
+  BTCScriptConfig_SimpleType,
+  BTCSignInitRequestSchema,
+  BTCSignInputRequestSchema,
+  BTCSignMessageRequestSchema,
+  BTCSignNextResponse_Type,
+  BTCSignOutputRequestSchema,
+  type BTCSignInitRequest_FormatUnit,
+  BTCXpubsRequestSchema,
+  type BTCScriptConfigWithKeypath,
+} from '../../proto/gen/btc_pb.js';
+import { KeypathSchema } from '../../proto/gen/common_pb.js';
+import { RequestSchema } from '../../proto/gen/hww_pb.js';
+import { rootFingerprint } from '../device.js';
+import { btcSignError, invalidTypeError } from '../errors.js';
+import { atLeast, parseSemver, type Info } from '../hww.js';
+import { parseKeypath } from '../keypath.js';
+import type { EncryptedChannel } from '../pairing.js';
+import { query, unexpectedResponse } from '../proto-query.js';
+import { requireVersion } from '../version.js';
+import { genHostNonce, hostCommit, verifyEcdsa, verifyEcdsaCompact } from '../eth/antiklepto.js';
+import {
+  mapCoin,
+  mapFormatUnit,
+  mapRegisterXpubType,
+  mapScriptConfig,
+  mapScriptConfigWithKeypath,
+  mapXpubsType,
+  mapXpubType,
+} from './config.js';
+import { addSignatures, parsePsbt, preparePsbt, type Transaction } from './psbt.js';
+import {
+  queryBtc,
+  queryBtcSignNext,
+  queryNestedBtcSignNext,
+} from './query.js';
+
+async function queryXpub(
+  channel: EncryptedChannel,
+  coin: BTCCoin,
+  keypath: number[],
+  xpubType: XPubType,
+  display: boolean,
+): Promise<string> {
+  const response = await query(channel, create(RequestSchema, {
+    request: {
+      case: 'btcPub',
+      value: create(BTCPubRequestSchema, {
+        coin,
+        keypath,
+        output: { case: 'xpubType', value: mapXpubType(xpubType) },
+        display,
+      }),
+    },
+  }));
+  if (response.response.case !== 'pub') {
+    throw unexpectedResponse();
+  }
+  return response.response.value.pub;
+}
+
+export async function btcXpub(
+  channel: EncryptedChannel,
+  coin: BtcCoin,
+  keypath: Keypath,
+  xpubType: XPubType,
+  display: boolean,
+): Promise<string> {
+  return queryXpub(channel, mapCoin(coin), parseKeypath(keypath), xpubType, display);
+}
+
+export async function btcXpubs(
+  channel: EncryptedChannel,
+  info: Info,
+  coin: BtcCoin,
+  keypaths: Keypath[],
+  xpubType: BtcXPubsType,
+): Promise<string[]> {
+  const parsedKeypaths = keypaths.map(parseKeypath);
+  const mappedCoin = mapCoin(coin);
+  const mappedType = mapXpubsType(xpubType);
+  if (!atLeast(parseSemver(info.version), { major: 9, minor: 24, patch: 0 })) {
+    const xpubs: string[] = [];
+    for (const keypath of parsedKeypaths) {
+      xpubs.push(await queryXpub(channel, mappedCoin, keypath, xpubType, false));
+    }
+    return xpubs;
+  }
+
+  const response = await queryBtc(channel, {
+    case: 'xpubs',
+    value: create(BTCXpubsRequestSchema, {
+      coin: mappedCoin,
+      xpubType: mappedType,
+      keypaths: parsedKeypaths.map(keypath => create(KeypathSchema, { keypath })),
+    }),
+  });
+  if (response.case !== 'pubs') {
+    throw unexpectedResponse();
+  }
+  return response.value.pubs;
+}
+
+function registration(
+  coin: BtcCoin,
+  scriptConfig: BtcScriptConfig,
+  keypathAccount: Keypath | undefined,
+) {
+  return create(BTCScriptConfigRegistrationSchema, {
+    coin: mapCoin(coin),
+    scriptConfig: mapScriptConfig(scriptConfig),
+    keypath: keypathAccount === undefined ? [] : parseKeypath(keypathAccount),
+  });
+}
+
+export async function btcIsScriptConfigRegistered(
+  channel: EncryptedChannel,
+  coin: BtcCoin,
+  scriptConfig: BtcScriptConfig,
+  keypathAccount: Keypath | undefined,
+): Promise<boolean> {
+  const response = await queryBtc(channel, {
+    case: 'isScriptConfigRegistered',
+    value: create(BTCIsScriptConfigRegisteredRequestSchema, {
+      registration: registration(coin, scriptConfig, keypathAccount),
+    }),
+  });
+  if (response.case !== 'isScriptConfigRegistered') {
+    throw unexpectedResponse();
+  }
+  return response.value.isRegistered;
+}
+
+export async function btcRegisterScriptConfig(
+  channel: EncryptedChannel,
+  coin: BtcCoin,
+  scriptConfig: BtcScriptConfig,
+  keypathAccount: Keypath | undefined,
+  xpubType: BtcRegisterXPubType,
+  name: string | undefined,
+): Promise<void> {
+  const response = await queryBtc(channel, {
+    case: 'registerScriptConfig',
+    value: create(BTCRegisterScriptConfigRequestSchema, {
+      registration: registration(coin, scriptConfig, keypathAccount),
+      name: name ?? '',
+      xpubType: mapRegisterXpubType(xpubType),
+    }),
+  });
+  if (response.case !== 'success') {
+    throw unexpectedResponse();
+  }
+}
+
+export async function btcAddress(
+  channel: EncryptedChannel,
+  coin: BtcCoin,
+  keypath: Keypath,
+  scriptConfig: BtcScriptConfig,
+  display: boolean,
+): Promise<string> {
+  const response = await query(channel, create(RequestSchema, {
+    request: {
+      case: 'btcPub',
+      value: create(BTCPubRequestSchema, {
+        coin: mapCoin(coin),
+        keypath: parseKeypath(keypath),
+        output: {
+          case: 'scriptConfig',
+          value: mapScriptConfig(scriptConfig),
+        },
+        display,
+      }),
+    },
+  }));
+  if (response.response.case !== 'pub') {
+    throw unexpectedResponse();
+  }
+  return response.response.value.pub;
+}
+
+function isTaprootSimple(scriptConfig: BTCScriptConfigWithKeypath): boolean {
+  return (
+    scriptConfig.scriptConfig?.config.case === 'simpleType' &&
+    scriptConfig.scriptConfig.config.value === BTCScriptConfig_SimpleType.P2TR
+  );
+}
+
+function isTaprootPolicy(scriptConfig: BTCScriptConfigWithKeypath): boolean {
+  return (
+    scriptConfig.scriptConfig?.config.case === 'policy' &&
+    scriptConfig.scriptConfig.config.value.policy.startsWith('tr(')
+  );
+}
+
+function isSchnorr(scriptConfig: BTCScriptConfigWithKeypath): boolean {
+  return isTaprootSimple(scriptConfig) || isTaprootPolicy(scriptConfig);
+}
+
+function makeHostNonceCommitment(hostNonce: Uint8Array) {
+  return create(AntiKleptoHostNonceCommitmentSchema, {
+    commitment: hostCommit(hostNonce),
+  });
+}
+
+async function btcSign(
+  channel: EncryptedChannel,
+  info: Info,
+  coin: BTCCoin,
+  transaction: Transaction,
+  outputScriptConfigs: BTCScriptConfigWithKeypath[],
+  outputScriptConfigIndices: (number | undefined)[],
+  formatUnit: BTCSignInitRequest_FormatUnit,
+): Promise<Uint8Array[]> {
+  if (
+    outputScriptConfigIndices.length !== 0 &&
+    outputScriptConfigIndices.length !== transaction.outputs.length
+  ) {
+    throw btcSignError('output script config indices must match transaction outputs');
+  }
+  requireVersion(info, { major: 9, minor: 4, patch: 0 });
+  if (
+    transaction.scriptConfigs
+      .concat(outputScriptConfigs)
+      .some(isTaprootSimple)
+  ) {
+    requireVersion(info, { major: 9, minor: 10, patch: 0 });
+  }
+  if (
+    transaction.outputs.some(output =>
+      output.kind === 'external' && output.outputType === BTCOutputType.OP_RETURN)
+  ) {
+    requireVersion(info, { major: 9, minor: 24, patch: 0 });
+  }
+
+  const signatures: Uint8Array[] = [];
+  let nextResponse = await queryBtcSignNext(channel, {
+    case: 'btcSignInit',
+    value: create(BTCSignInitRequestSchema, {
+      coin,
+      scriptConfigs: transaction.scriptConfigs,
+      outputScriptConfigs,
+      version: transaction.version,
+      numInputs: transaction.inputs.length,
+      numOutputs: transaction.outputs.length,
+      locktime: transaction.locktime,
+      formatUnit,
+      containsSilentPaymentOutputs: false,
+    }),
+  });
+
+  let isInputsPass2 = false;
+  for (;;) {
+    switch (nextResponse.type) {
+      case BTCSignNextResponse_Type.INPUT: {
+        const inputIndex = nextResponse.index;
+        const input = transaction.inputs[inputIndex];
+        if (input === undefined) {
+          throw unexpectedResponse();
+        }
+        const scriptConfig = transaction.scriptConfigs[input.scriptConfigIndex];
+        if (scriptConfig === undefined) {
+          throw unexpectedResponse();
+        }
+        const performAntiklepto = isInputsPass2 && !isSchnorr(scriptConfig);
+        const hostNonce = performAntiklepto ? genHostNonce() : undefined;
+        nextResponse = await queryBtcSignNext(channel, {
+          case: 'btcSignInput',
+          value: create(BTCSignInputRequestSchema, {
+            prevOutHash: input.prevOutHash,
+            prevOutIndex: input.prevOutIndex,
+            prevOutValue: input.prevOutValue,
+            sequence: input.sequence,
+            keypath: input.keypath,
+            scriptConfigIndex: input.scriptConfigIndex,
+            ...(hostNonce === undefined
+              ? {}
+              : { hostNonceCommitment: makeHostNonceCommitment(hostNonce) }),
+          }),
+        });
+
+        if (hostNonce !== undefined) {
+          if (
+            nextResponse.type !== BTCSignNextResponse_Type.HOST_NONCE ||
+            nextResponse.antiKleptoSignerCommitment === undefined
+          ) {
+            throw unexpectedResponse();
+          }
+          const signerCommitment = nextResponse.antiKleptoSignerCommitment.commitment;
+          nextResponse = await queryNestedBtcSignNext(channel, {
+            case: 'antikleptoSignature',
+            value: create(AntiKleptoSignatureRequestSchema, { hostNonce }),
+          });
+          if (!nextResponse.hasSignature) {
+            throw unexpectedResponse();
+          }
+          verifyEcdsaCompact(hostNonce, signerCommitment, nextResponse.signature);
+        }
+
+        if (isInputsPass2) {
+          if (!nextResponse.hasSignature) {
+            throw unexpectedResponse();
+          }
+          signatures.push(nextResponse.signature);
+        }
+        if (inputIndex === transaction.inputs.length - 1) {
+          isInputsPass2 = true;
+        }
+        break;
+      }
+      case BTCSignNextResponse_Type.PREVTX_INIT: {
+        const previous = transaction.inputs[nextResponse.index]?.prevTx;
+        if (previous === undefined) {
+          throw btcSignError("input's previous transaction required but missing");
+        }
+        nextResponse = await queryNestedBtcSignNext(channel, {
+          case: 'prevtxInit',
+          value: create(BTCPrevTxInitRequestSchema, {
+            version: previous.version,
+            numInputs: previous.inputs.length,
+            numOutputs: previous.outputs.length,
+            locktime: previous.locktime,
+          }),
+        });
+        break;
+      }
+      case BTCSignNextResponse_Type.PREVTX_INPUT: {
+        const previous = transaction.inputs[nextResponse.index]?.prevTx;
+        const input = previous?.inputs[nextResponse.prevIndex];
+        if (input === undefined) {
+          throw unexpectedResponse();
+        }
+        nextResponse = await queryNestedBtcSignNext(channel, {
+          case: 'prevtxInput',
+          value: create(BTCPrevTxInputRequestSchema, input),
+        });
+        break;
+      }
+      case BTCSignNextResponse_Type.PREVTX_OUTPUT: {
+        const previous = transaction.inputs[nextResponse.index]?.prevTx;
+        const output = previous?.outputs[nextResponse.prevIndex];
+        if (output === undefined) {
+          throw unexpectedResponse();
+        }
+        nextResponse = await queryNestedBtcSignNext(channel, {
+          case: 'prevtxOutput',
+          value: create(BTCPrevTxOutputRequestSchema, output),
+        });
+        break;
+      }
+      case BTCSignNextResponse_Type.OUTPUT: {
+        const outputIndex = nextResponse.index;
+        const output = transaction.outputs[outputIndex];
+        if (output === undefined) {
+          throw unexpectedResponse();
+        }
+        nextResponse = await queryBtcSignNext(channel, {
+          case: 'btcSignOutput',
+          value: output.kind === 'internal'
+            ? create(BTCSignOutputRequestSchema, {
+              ours: true,
+              value: output.value,
+              keypath: output.keypath,
+              scriptConfigIndex: output.scriptConfigIndex,
+              ...(outputScriptConfigIndices[outputIndex] === undefined
+                ? {}
+                : {
+                  outputScriptConfigIndex:
+                    outputScriptConfigIndices[outputIndex],
+                }),
+            })
+            : create(BTCSignOutputRequestSchema, {
+              ours: false,
+              type: output.outputType,
+              value: output.value,
+              payload: output.payload,
+            }),
+        });
+        break;
+      }
+      case BTCSignNextResponse_Type.DONE:
+        return signatures;
+      case BTCSignNextResponse_Type.HOST_NONCE:
+      case BTCSignNextResponse_Type.PAYMENT_REQUEST:
+      default:
+        throw unexpectedResponse();
+    }
+  }
+}
+
+export async function btcSignPSBT(
+  channel: EncryptedChannel,
+  info: Info,
+  coin: BtcCoin,
+  psbtBase64: string,
+  forcedScriptConfig: BtcScriptConfigWithKeypath | undefined,
+  formatUnit: BtcFormatUnit,
+): Promise<string> {
+  const psbt = parsePsbt(psbtBase64);
+  const mappedCoin = mapCoin(coin);
+  const mappedScriptConfig = forcedScriptConfig === undefined
+    ? undefined
+    : mapScriptConfigWithKeypath(forcedScriptConfig);
+  const mappedFormatUnit = mapFormatUnit(formatUnit);
+  // Since v9.15.0, the device accepts any device-owned output as internal, not only change.
+  requireVersion(info, { major: 9, minor: 15, patch: 0 });
+  const fingerprint = await rootFingerprint(channel);
+  const prepared = preparePsbt(info, fingerprint, psbt, mappedScriptConfig);
+  const signatures = await btcSign(
+    channel,
+    info,
+    mappedCoin,
+    prepared.transaction,
+    prepared.outputScriptConfigs,
+    prepared.outputScriptConfigIndices,
+    mappedFormatUnit,
+  );
+  return addSignatures(prepared, signatures);
+}
+
+export async function btcSignMessage(
+  channel: EncryptedChannel,
+  info: Info,
+  coin: BtcCoin,
+  scriptConfig: BtcScriptConfigWithKeypath,
+  msg: Uint8Array,
+): Promise<BtcSignMessageSignature> {
+  requireVersion(info, { major: 9, minor: 5, patch: 0 });
+  if (!(msg instanceof Uint8Array)) {
+    throw invalidTypeError('wrong type for Uint8Array');
+  }
+  const hostNonce = genHostNonce();
+  const response = await queryBtc(channel, {
+    case: 'signMessage',
+    value: create(BTCSignMessageRequestSchema, {
+      coin: mapCoin(coin),
+      scriptConfig: mapScriptConfigWithKeypath(scriptConfig),
+      msg,
+      hostNonceCommitment: makeHostNonceCommitment(hostNonce),
+    }),
+  });
+  if (response.case !== 'antikleptoSignerCommitment') {
+    throw unexpectedResponse();
+  }
+
+  const signatureResponse = await queryBtc(channel, {
+    case: 'antikleptoSignature',
+    value: create(AntiKleptoSignatureRequestSchema, { hostNonce }),
+  });
+  if (signatureResponse.case !== 'signMessage') {
+    throw unexpectedResponse();
+  }
+  const signature = signatureResponse.value.signature;
+  if (signature.length !== 65) {
+    throw unexpectedResponse('signature must be 65 bytes');
+  }
+  verifyEcdsa(hostNonce, response.value.commitment, signature);
+
+  const sig = Array.from(signature.slice(0, 64));
+  const recid = signature[64]!;
+  return {
+    sig,
+    recid,
+    // BitBox02 uses only compressed pubkeys. Electrum encodes that as +4.
+    electrumSig65: [27 + 4 + recid, ...sig],
+  };
+}
diff --git a/src/internal/btc/psbt.ts b/src/internal/btc/psbt.ts
new file mode 100644
index 0000000..50134aa
--- /dev/null
+++ b/src/internal/btc/psbt.ts
@@ -0,0 +1,559 @@
+// SPDX-License-Identifier: Apache-2.0
+
+import { equals } from '@bufbuild/protobuf';
+import {
+  opcodes,
+  payments,
+  type PaymentCreator,
+  Psbt,
+  script as bitcoinScript,
+  Transaction as BitcoinTransaction,
+} from 'bitcoinjs-lib';
+import {
+  BTCOutputType,
+  BTCScriptConfig_SimpleType,
+  BTCScriptConfigWithKeypathSchema,
+  type BTCScriptConfigWithKeypath,
+} from '../../proto/gen/btc_pb.js';
+import {
+  CODE_PSBT_INVALID_ACCOUNT_KEYPATH,
+  CODE_PSBT_INVALID_OP_RETURN,
+  CODE_PSBT_KEY_NOT_FOUND,
+  CODE_PSBT_KEY_NOT_UNIQUE,
+  CODE_PSBT_SIGN_ERROR,
+  CODE_PSBT_UNKNOWN_OUTPUT_TYPE,
+  btcSignError,
+  psbtError,
+  psbtParseError,
+} from '../errors.js';
+import type { Info } from '../hww.js';
+import { atLeast, parseSemver } from '../hww.js';
+import { HARDENED, parseKeypath } from '../keypath.js';
+import { hexToBytes } from '../utils.js';
+import { makeSimpleScriptConfigWithKeypath } from './config.js';
+
+type PsbtInput = Psbt['data']['inputs'][number];
+type PsbtOutput = Psbt['data']['outputs'][number];
+
+const HASH_PAYMENTS: [PaymentCreator, BTCOutputType][] = [
+  [payments.p2pkh, BTCOutputType.P2PKH],
+  [payments.p2sh, BTCOutputType.P2SH],
+  [payments.p2wpkh, BTCOutputType.P2WPKH],
+  [payments.p2wsh, BTCOutputType.P2WSH],
+];
+
+export type OurKey =
+  | { kind: 'segwit'; pubkey: Uint8Array; keypath: number[] }
+  | { kind: 'taprootInternal'; keypath: number[] }
+  | {
+    kind: 'taprootScript';
+    pubkey: Uint8Array;
+    leafHash: Uint8Array;
+    keypath: number[];
+  };
+
+export type PrevTx = {
+  version: number;
+  inputs: {
+    prevOutHash: Uint8Array;
+    prevOutIndex: number;
+    signatureScript: Uint8Array;
+    sequence: number;
+  }[];
+  outputs: { value: bigint; pubkeyScript: Uint8Array }[];
+  locktime: number;
+};
+
+export type TxInput = {
+  prevOutHash: Uint8Array;
+  prevOutIndex: number;
+  prevOutValue: bigint;
+  sequence: number;
+  keypath: number[];
+  scriptConfigIndex: number;
+  prevTx?: PrevTx;
+};
+
+export type TxOutput =
+  | {
+    kind: 'internal';
+    keypath: number[];
+    value: bigint;
+    scriptConfigIndex: number;
+  }
+  | {
+    kind: 'external';
+    payload: Uint8Array;
+    outputType: BTCOutputType;
+    value: bigint;
+  };
+
+export type Transaction = {
+  scriptConfigs: BTCScriptConfigWithKeypath[];
+  version: number;
+  inputs: TxInput[];
+  outputs: TxOutput[];
+  locktime: number;
+};
+
+export type PreparedPsbt = {
+  psbt: Psbt;
+  transaction: Transaction;
+  ourKeys: OurKey[];
+  outputScriptConfigs: BTCScriptConfigWithKeypath[];
+  outputScriptConfigIndices: (number | undefined)[];
+};
+
+function bytesEqual(left: Uint8Array, right: Uint8Array): boolean {
+  if (left.length !== right.length) {
+    return false;
+  }
+  return left.every((byte, index) => byte === right[index]);
+}
+
+function derivationPath(path: string): number[] {
+  return path === 'm' ? [] : parseKeypath(path);
+}
+
+function findOurKey(
+  ourRootFingerprint: Uint8Array,
+  outputInfo: PsbtInput | PsbtOutput,
+): OurKey {
+  for (const derivation of outputInfo.tapBip32Derivation ?? []) {
+    if (!bytesEqual(derivation.masterFingerprint, ourRootFingerprint)) {
+      continue;
+    }
+    // TODO: check for fingerprint collision.
+    const keypath = derivationPath(derivation.path);
+    if (
+      outputInfo.tapInternalKey !== undefined &&
+      bytesEqual(outputInfo.tapInternalKey, derivation.pubkey)
+    ) {
+      if (derivation.leafHashes.length !== 0) {
+        // We do not support the same key as both the internal key and a leaf key.
+        throw psbtError(
+          CODE_PSBT_KEY_NOT_UNIQUE,
+          'Taproot pubkeys must be unique across the internal key and all leaf scripts.',
+        );
+      }
+      return { kind: 'taprootInternal', keypath };
+    }
+    // BIP-388 makes pubkeys unique, so our key cannot occur in multiple leaves.
+    if (derivation.leafHashes.length !== 1) {
+      throw psbtError(
+        CODE_PSBT_KEY_NOT_UNIQUE,
+        'Taproot pubkeys must be unique across the internal key and all leaf scripts.',
+      );
+    }
+    return {
+      kind: 'taprootScript',
+      pubkey: derivation.pubkey,
+      leafHash: derivation.leafHashes[0]!,
+      keypath,
+    };
+  }
+
+  for (const derivation of outputInfo.bip32Derivation ?? []) {
+    if (bytesEqual(derivation.masterFingerprint, ourRootFingerprint)) {
+      // TODO: check for fingerprint collision.
+      return {
+        kind: 'segwit',
+        pubkey: derivation.pubkey,
+        keypath: derivationPath(derivation.path),
+      };
+    }
+  }
+  throw psbtError(CODE_PSBT_KEY_NOT_FOUND, 'Could not find our key in an input.');
+}
+
+function paymentHash(
+  payment: PaymentCreator,
+  script: Uint8Array,
+): Uint8Array | undefined {
+  try {
+    return payment({ output: script }).hash;
+  } catch {
+    return undefined;
+  }
+}
+
+function p2trPayload(script: Uint8Array): Uint8Array | undefined {
+  // Parsing a p2tr payment otherwise requires bitcoinjs-lib's optional ECC backend.
+  const chunks = bitcoinScript.decompile(script);
+  if (
+    chunks?.length === 2 &&
+    chunks[0] === opcodes.OP_1 &&
+    chunks[1] instanceof Uint8Array &&
+    chunks[1].length === 32 &&
+    bytesEqual(bitcoinScript.compile(chunks), script)
+  ) {
+    return chunks[1];
+  }
+  return undefined;
+}
+
+function invalidOpReturn(detail: string): never {
+  throw psbtError(CODE_PSBT_INVALID_OP_RETURN, `Invalid OP_RETURN script: ${detail}`);
+}
+
+function readOpReturnPush(script: Uint8Array): Uint8Array {
+  const chunks = bitcoinScript.decompile(script);
+  if (chunks === null) {
+    return invalidOpReturn('failed to parse OP_RETURN payload');
+  }
+  if (chunks.length === 1) {
+    return invalidOpReturn('naked OP_RETURN is not supported');
+  }
+  if (chunks.length !== 2) {
+    return invalidOpReturn('only one data push supported after OP_RETURN');
+  }
+  let canonical: Uint8Array;
+  try {
+    canonical = bitcoinScript.compile(chunks);
+  } catch {
+    return invalidOpReturn('failed to parse OP_RETURN payload');
+  }
+  if (!bytesEqual(canonical, script)) {
+    return invalidOpReturn('failed to parse OP_RETURN payload');
+  }
+  const payload = chunks[1];
+  if (payload === opcodes.OP_0) {
+    return new Uint8Array();
+  }
+  if (!(payload instanceof Uint8Array)) {
+    return invalidOpReturn('no data push found after OP_RETURN');
+  }
+  return payload;
+}
+
+export function payloadFromPkscript(
+  script: Uint8Array,
+): { data: Uint8Array; outputType: BTCOutputType } {
+  for (const [payment, outputType] of HASH_PAYMENTS) {
+    const data = paymentHash(payment, script);
+    if (data !== undefined) {
+      return { data, outputType };
+    }
+  }
+  const p2tr = p2trPayload(script);
+  if (p2tr !== undefined) {
+    return { data: p2tr, outputType: BTCOutputType.P2TR };
+  }
+  const chunks = bitcoinScript.decompile(script);
+  if (chunks?.[0] === opcodes.OP_RETURN) {
+    const payload = readOpReturnPush(script);
+    return { data: payload, outputType: BTCOutputType.OP_RETURN };
+  }
+  throw psbtError(
+    CODE_PSBT_UNKNOWN_OUTPUT_TYPE,
+    'Unrecognized/unsupported output type.',
+  );
+}
+
+function hardenedPrefix(keypath: number[]): number[] {
+  const firstUnhardened = keypath.findIndex(element => element < HARDENED);
+  return keypath.slice(0, firstUnhardened === -1 ? undefined : firstUnhardened);
+}
+
+function scriptConfigFromUtxo(
+  script: Uint8Array,
+  keypath: number[],
+  redeemScript: Uint8Array | undefined,
+): BTCScriptConfigWithKeypath {
+  const accountKeypath = hardenedPrefix(keypath);
+  if (paymentHash(payments.p2wpkh, script) !== undefined) {
+    return makeSimpleScriptConfigWithKeypath(
+      BTCScriptConfig_SimpleType.P2WPKH,
+      accountKeypath,
+    );
+  }
+  if (
+    paymentHash(payments.p2sh, script) !== undefined &&
+    redeemScript !== undefined &&
+    paymentHash(payments.p2wpkh, redeemScript) !== undefined
+  ) {
+    return makeSimpleScriptConfigWithKeypath(
+      BTCScriptConfig_SimpleType.P2WPKH_P2SH,
+      accountKeypath,
+    );
+  }
+  if (p2trPayload(script) !== undefined) {
+    return makeSimpleScriptConfigWithKeypath(
+      BTCScriptConfig_SimpleType.P2TR,
+      accountKeypath,
+    );
+  }
+  // Multisig and policy configs cannot currently be inferred and must be forced.
+  throw psbtError(
+    CODE_PSBT_UNKNOWN_OUTPUT_TYPE,
+    'Unrecognized/unsupported output type.',
+  );
+}
+
+function parseTransaction(raw: Uint8Array): BitcoinTransaction {
+  try {
+    return BitcoinTransaction.fromBuffer(raw);
+  } catch (error) {
+    throw psbtError(
+      CODE_PSBT_SIGN_ERROR,
+      error instanceof Error ? error.message : String(error),
+    );
+  }
+}
+
+function previousTransaction(transaction: BitcoinTransaction): PrevTx {
+  return {
+    version: transaction.version >>> 0,
+    inputs: transaction.ins.map(input => ({
+      prevOutHash: input.hash,
+      prevOutIndex: input.index,
+      signatureScript: input.script,
+      sequence: input.sequence,
+    })),
+    outputs: transaction.outs.map(output => ({
+      value: output.value,
+      pubkeyScript: output.script,
+    })),
+    locktime: transaction.locktime,
+  };
+}
+
+function spendUtxo(
+  inputIndex: number,
+  txInput: Psbt['txInputs'][number],
+  psbtInput: PsbtInput,
+  previous: BitcoinTransaction | undefined,
+): { value: bigint; script: Uint8Array } {
+  if (psbtInput.witnessUtxo !== undefined) {
+    return psbtInput.witnessUtxo;
+  }
+  if (previous === undefined) {
+    throw psbtError(CODE_PSBT_SIGN_ERROR, 'missing spend utxo in PSBT');
+  }
+  if (!bytesEqual(previous.getHash(), txInput.hash)) {
+    throw psbtError(
+      CODE_PSBT_SIGN_ERROR,
+      `non-witness UTXO hash for input ${inputIndex} does not match the prevout`,
+    );
+  }
+  const output = previous.outs[txInput.index];
+  if (output === undefined) {
+    throw psbtError(CODE_PSBT_SIGN_ERROR, 'previous output index is out of bounds');
+  }
+  return output;
+}
+
+function isSimpleScriptConfig(config: BTCScriptConfigWithKeypath): boolean {
+  return config.scriptConfig?.config.case === 'simpleType';
+}
+
+function isSameAccount(
+  inputScriptConfigs: BTCScriptConfigWithKeypath[],
+  outputScriptConfig: BTCScriptConfigWithKeypath,
+): boolean {
+  for (const inputScriptConfig of inputScriptConfigs) {
+    if (isSimpleScriptConfig(inputScriptConfig)) {
+      const inputAccount = inputScriptConfig.keypath[2];
+      const outputAccount = outputScriptConfig.keypath[2];
+      if (inputAccount === undefined || outputAccount === undefined) {
+        throw psbtError(
+          CODE_PSBT_INVALID_ACCOUNT_KEYPATH,
+          'Account script configs must contain a BIP44 account keypath.',
+        );
+      }
+      if (inputAccount !== outputAccount) {
+        return false;
+      }
+    } else if (
+      !equals(
+        BTCScriptConfigWithKeypathSchema,
+        inputScriptConfig,
+        outputScriptConfig,
+      )
+    ) {
+      return false;
+    }
+  }
+  return true;
+}
+
+function findOrAddScriptConfig(
+  configs: BTCScriptConfigWithKeypath[],
+  config: BTCScriptConfigWithKeypath,
+): number {
+  const index = configs.findIndex(existing =>
+    equals(BTCScriptConfigWithKeypathSchema, existing, config));
+  if (index !== -1) {
+    return index;
+  }
+  configs.push(config);
+  return configs.length - 1;
+}
+
+export function parsePsbt(value: string): Psbt {
+  try {
+    return Psbt.fromBase64(value);
+  } catch (error) {
+    throw psbtParseError(error instanceof Error ? error.message : String(error));
+  }
+}
+
+export function preparePsbt(
+  info: Info,
+  rootFingerprint: string,
+  psbt: Psbt,
+  forcedScriptConfig: BTCScriptConfigWithKeypath | undefined,
+): PreparedPsbt {
+  const ourRootFingerprint = hexToBytes(rootFingerprint);
+  const isScriptConfigForced = forcedScriptConfig !== undefined;
+  const scriptConfigs = forcedScriptConfig === undefined ? [] : [forcedScriptConfig];
+  const outputScriptConfigs: BTCScriptConfigWithKeypath[] = [];
+  const supportsSeparateOutputConfigs = atLeast(
+    parseSemver(info.version),
+    { major: 9, minor: 22, patch: 0 },
+  );
+  const ourKeys: OurKey[] = [];
+  const inputs: TxInput[] = [];
+
+  for (let inputIndex = 0; inputIndex < psbt.txInputs.length; inputIndex += 1) {
+    const txInput = psbt.txInputs[inputIndex]!;
+    const psbtInput = psbt.data.inputs[inputIndex]!;
+    const previous = psbtInput.nonWitnessUtxo === undefined
+      ? undefined
+      : parseTransaction(psbtInput.nonWitnessUtxo);
+    const utxo = spendUtxo(inputIndex, txInput, psbtInput, previous);
+    const ourKey = findOurKey(ourRootFingerprint, psbtInput);
+    const scriptConfigIndex = isScriptConfigForced
+      ? 0
+      : findOrAddScriptConfig(
+        scriptConfigs,
+        scriptConfigFromUtxo(utxo.script, ourKey.keypath, psbtInput.redeemScript),
+      );
+    inputs.push({
+      prevOutHash: txInput.hash,
+      prevOutIndex: txInput.index,
+      prevOutValue: utxo.value,
+      sequence: txInput.sequence ?? BitcoinTransaction.DEFAULT_SEQUENCE,
+      keypath: ourKey.keypath,
+      scriptConfigIndex,
+      ...(previous === undefined ? {} : { prevTx: previousTransaction(previous) }),
+    });
+    ourKeys.push(ourKey);
+  }
+
+  const outputs: TxOutput[] = [];
+  const outputScriptConfigIndices: (number | undefined)[] = [];
+  for (let outputIndex = 0; outputIndex < psbt.txOutputs.length; outputIndex += 1) {
+    const txOutput = psbt.txOutputs[outputIndex]!;
+    const psbtOutput = psbt.data.outputs[outputIndex]!;
+    let ourKey: OurKey | undefined;
+    try {
+      ourKey = findOurKey(ourRootFingerprint, psbtOutput);
+    } catch {
+      // Missing output key origin information means this is an external output.
+    }
+    if (ourKey === undefined) {
+      const payload = payloadFromPkscript(txOutput.script);
+      outputs.push({
+        kind: 'external',
+        payload: payload.data,
+        outputType: payload.outputType,
+        value: txOutput.value,
+      });
+      outputScriptConfigIndices.push(undefined);
+      continue;
+    }
+
+    const scriptConfig = isScriptConfigForced
+      ? scriptConfigs[0]!
+      : scriptConfigFromUtxo(
+        txOutput.script,
+        ourKey.keypath,
+        psbtOutput.redeemScript,
+      );
+    if (isSameAccount(scriptConfigs, scriptConfig)) {
+      outputs.push({
+        kind: 'internal',
+        keypath: ourKey.keypath,
+        value: txOutput.value,
+        scriptConfigIndex: findOrAddScriptConfig(scriptConfigs, scriptConfig),
+      });
+      outputScriptConfigIndices.push(undefined);
+    } else if (supportsSeparateOutputConfigs) {
+      outputs.push({
+        kind: 'internal',
+        keypath: ourKey.keypath,
+        value: txOutput.value,
+        scriptConfigIndex: 0,
+      });
+      outputScriptConfigIndices.push(
+        findOrAddScriptConfig(outputScriptConfigs, scriptConfig),
+      );
+    } else {
+      const payload = payloadFromPkscript(txOutput.script);
+      outputs.push({
+        kind: 'external',
+        payload: payload.data,
+        outputType: payload.outputType,
+        value: txOutput.value,
+      });
+      outputScriptConfigIndices.push(undefined);
+    }
+  }
+
+  return {
+    psbt,
+    transaction: {
+      scriptConfigs,
+      version: psbt.version >>> 0,
+      inputs,
+      outputs,
+      locktime: psbt.locktime,
+    },
+    ourKeys,
+    outputScriptConfigs,
+    outputScriptConfigIndices,
+  };
+}
+
+export function addSignatures(
+  prepared: PreparedPsbt,
+  signatures: Uint8Array[],
+): string {
+  if (signatures.length !== prepared.ourKeys.length) {
+    throw btcSignError('signature count must match transaction inputs');
+  }
+  signatures.forEach((signature, inputIndex) => {
+    const input = prepared.psbt.data.inputs[inputIndex]!;
+    const ourKey = prepared.ourKeys[inputIndex]!;
+    switch (ourKey.kind) {
+      case 'segwit': {
+        input.partialSig = [
+          ...(input.partialSig ?? []).filter(item => !bytesEqual(item.pubkey, ourKey.pubkey)),
+          {
+            pubkey: ourKey.pubkey,
+            signature: bitcoinScript.signature.encode(
+              signature,
+              BitcoinTransaction.SIGHASH_ALL,
+            ),
+          },
+        ];
+        break;
+      }
+      case 'taprootInternal':
+        input.tapKeySig = signature;
+        break;
+      case 'taprootScript':
+        input.tapScriptSig = [
+          ...(input.tapScriptSig ?? []).filter(item =>
+            !(
+              bytesEqual(item.pubkey, ourKey.pubkey) &&
+              bytesEqual(item.leafHash, ourKey.leafHash)
+            )),
+          { pubkey: ourKey.pubkey, leafHash: ourKey.leafHash, signature },
+        ];
+        break;
+    }
+  });
+  return prepared.psbt.toBase64();
+}
diff --git a/src/internal/btc/query.ts b/src/internal/btc/query.ts
new file mode 100644
index 0000000..4266886
--- /dev/null
+++ b/src/internal/btc/query.ts
@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: Apache-2.0
+
+import { create } from '@bufbuild/protobuf';
+import {
+  BTCRequestSchema,
+  type BTCRequest,
+  type BTCResponse,
+  type BTCSignNextResponse,
+} from '../../proto/gen/btc_pb.js';
+import {
+  RequestSchema,
+  type Request,
+} from '../../proto/gen/hww_pb.js';
+import type { EncryptedChannel } from '../pairing.js';
+import { query, unexpectedResponse } from '../proto-query.js';
+
+export async function queryBtc(
+  channel: EncryptedChannel,
+  btcRequest: BTCRequest['request'],
+): Promise<BTCResponse['response']> {
+  const wrapped = create(RequestSchema, {
+    request: {
+      case: 'btc',
+      value: create(BTCRequestSchema, { request: btcRequest }),
+    },
+  });
+  const response = await query(channel, wrapped);
+  if (response.response.case !== 'btc') {
+    throw unexpectedResponse();
+  }
+  if (response.response.value.response.case === undefined) {
+    throw unexpectedResponse('BitBox returned an empty Bitcoin response');
+  }
+  return response.response.value.response;
+}
+
+export async function queryBtcSignNext(
+  channel: EncryptedChannel,
+  request: Request['request'],
+): Promise<BTCSignNextResponse> {
+  const response = await query(channel, create(RequestSchema, { request }));
+  if (response.response.case !== 'btcSignNext') {
+    throw unexpectedResponse();
+  }
+  return response.response.value;
+}
+
+export async function queryNestedBtcSignNext(
+  channel: EncryptedChannel,
+  request: BTCRequest['request'],
+): Promise<BTCSignNextResponse> {
+  const response = await queryBtc(channel, request);
+  if (response.case !== 'signNext') {
+    throw unexpectedResponse();
+  }
+  return response.value;
+}
diff --git a/src/internal/errors.ts b/src/internal/errors.ts
index 98d717f..fe44508 100644
--- a/src/internal/errors.ts
+++ b/src/internal/errors.ts
@@ -41,12 +41,14 @@ export interface BitBoxError {
 /** @internal */ export const CODE_BITBOX_NOISE_ENCRYPT = 'bitbox-noise-encrypt';
 /** @internal */ export const CODE_BITBOX_NOISE_DECRYPT = 'bitbox-noise-decrypt';
 
-// PSBT error codes kept here for the public error surface, even before BTC support lands.
+// PSBT error codes exposed by Bitcoin signing.
 /** @internal */ export const CODE_PSBT_SIGN_ERROR = 'psbt-sign-error';
 /** @internal */ export const CODE_PSBT_KEY_NOT_UNIQUE = 'psbt-key-not-unique';
 /** @internal */ export const CODE_PSBT_KEY_NOT_FOUND = 'psbt-key-not-found';
 /** @internal */ export const CODE_PSBT_UNKNOWN_OUTPUT_TYPE = 'psbt-unknown-output-type';
 /** @internal */ export const CODE_PSBT_INVALID_OP_RETURN = 'psbt-invalid-op-return';
+/** @internal */ export const CODE_PSBT_INVALID_ACCOUNT_KEYPATH =
+  'psbt-invalid-account-keypath';
 
 // TS compatibility codes for methods or lifecycle states without a device roundtrip.
 /** @internal */ export const CODE_UNSUPPORTED = 'unsupported';
@@ -137,6 +139,21 @@ export function chainIdTooLargeError(chainId: bigint): TypedError {
   );
 }
 
+/** @internal */
+export function btcSignError(detail: string): TypedError {
+  return makeError(CODE_BTC_SIGN, `Bitcoin transaction signing error: ${detail}`);
+}
+
+/** @internal */
+export function psbtParseError(detail: string): TypedError {
+  return makeError(CODE_PSBT_PARSE, `PSBT parse error: ${detail}`);
+}
+
+/** @internal */
+export function psbtError(code: string, detail: string): TypedError {
+  return makeError(code, `PSBT error: ${detail}`);
+}
+
 /** @internal */
 export function invalidTypeError(detail: string): TypedError {
   return makeError(CODE_INVALID_TYPE, `invalid JavaScript type: ${detail}`);
@@ -199,6 +216,7 @@ const TYPED_PUBLIC_CODES = new Set<string>([
   CODE_PSBT_KEY_NOT_FOUND,
   CODE_PSBT_UNKNOWN_OUTPUT_TYPE,
   CODE_PSBT_INVALID_OP_RETURN,
+  CODE_PSBT_INVALID_ACCOUNT_KEYPATH,
   CODE_UNSUPPORTED,
   CODE_NOT_IMPLEMENTED,
   CODE_INVALID_STATE,
diff --git a/src/internal/eth/antiklepto.ts b/src/internal/eth/antiklepto.ts
index acd5503..243ade6 100644
--- a/src/internal/eth/antiklepto.ts
+++ b/src/internal/eth/antiklepto.ts
@@ -29,14 +29,11 @@ export function hostCommit(hostNonce: Uint8Array): Uint8Array {
   return taggedSha256(HOST_COMMIT_TAG, hostNonce);
 }
 
-export function verifyEcdsa(
+function verifyEcdsaInner(
   hostNonce: Uint8Array,
   signerCommitment: Uint8Array,
   signature: Uint8Array,
 ): void {
-  if (signature.length !== 65) {
-    throw antikleptoError('signature must be 65 bytes');
-  }
   let point;
   try {
     point = secp256k1.ProjectivePoint.fromHex(signerCommitment);
@@ -64,3 +61,25 @@ export function verifyEcdsa(
     }
   }
 }
+
+export function verifyEcdsa(
+  hostNonce: Uint8Array,
+  signerCommitment: Uint8Array,
+  signature: Uint8Array,
+): void {
+  if (signature.length !== 65) {
+    throw antikleptoError('signature must be 65 bytes');
+  }
+  verifyEcdsaInner(hostNonce, signerCommitment, signature);
+}
+
+export function verifyEcdsaCompact(
+  hostNonce: Uint8Array,
+  signerCommitment: Uint8Array,
+  signature: Uint8Array,
+): void {
+  if (signature.length !== 64) {
+    throw antikleptoError('signature must be 64 bytes');
+  }
+  verifyEcdsaInner(hostNonce, signerCommitment, signature);
+}
diff --git a/test/btc-methods.test.ts b/test/btc-methods.test.ts
new file mode 100644
index 0000000..9795702
--- /dev/null
+++ b/test/btc-methods.test.ts
@@ -0,0 +1,147 @@
+// SPDX-License-Identifier: Apache-2.0
+
+import { readFileSync } from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { Psbt } from 'bitcoinjs-lib';
+import { describe, expect, it, vi } from 'vitest';
+import { PairedBitBox } from '../src/index.js';
+import type { Info } from '../src/internal/hww.js';
+import type { EncryptedChannel } from '../src/internal/pairing.js';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const vectors = JSON.parse(readFileSync(
+  path.join(__dirname, 'data/btc-transaction-test-vectors.json'),
+  'utf8',
+)) as { vectors: { psbt: { transaction: string } }[] };
+const validPsbt = Psbt.fromHex(vectors.vectors[0]!.psbt.transaction).toBase64();
+
+function paired(version = '9.26.0') {
+  const query = vi.fn(async () => {
+    throw new Error('unexpected device query');
+  });
+  const info: Info = {
+    version,
+    product: 'bitbox02-multi',
+    unlocked: true,
+    initialized: true,
+  };
+  return {
+    bitbox: new PairedBitBox({
+      channel: { query } as EncryptedChannel,
+      info,
+      close(): void {},
+    }),
+    query,
+  };
+}
+
+describe('Bitcoin host validation', () => {
+  it('uses the shared keypath parser', async () => {
+    const { bitbox, query } = paired();
+    await expect(bitbox.btcXpub('btc', 'not-a-keypath', 'xpub', false))
+      .rejects.toMatchObject({ code: 'keypath-parse' });
+    await expect(bitbox.btcAddress(
+      'btc',
+      'also-not-a-keypath',
+      { simpleType: 'p2wpkh' },
+      false,
+    )).rejects.toMatchObject({ code: 'keypath-parse' });
+    expect(query).not.toHaveBeenCalled();
+  });
+
+  it('keeps invalid BTC discriminants on the invalid-type surface', async () => {
+    const { bitbox, query } = paired();
+    await expect(bitbox.btcXpub(
+      'doge' as 'btc',
+      "m/84'/0'/0'",
+      'xpub',
+      false,
+    )).rejects.toMatchObject({ code: 'invalid-type' });
+    await expect(bitbox.btcAddress(
+      'btc',
+      "m/84'/0'/0'/0/0",
+      { simpleType: 'legacy' as 'p2wpkh' },
+      false,
+    )).rejects.toMatchObject({ code: 'invalid-type' });
+    expect(query).not.toHaveBeenCalled();
+  });
+
+  it('validates the coin in the legacy xpubs fallback with no keypaths', async () => {
+    const { bitbox, query } = paired('9.23.0');
+    await expect(bitbox.btcXpubs('doge' as 'btc', [], 'xpub'))
+      .rejects.toMatchObject({ code: 'invalid-type' });
+    expect(query).not.toHaveBeenCalled();
+  });
+
+  it('rejects non-xpub/tpub versions in script configs', async () => {
+    const { bitbox, query } = paired();
+    await expect(bitbox.btcAddress(
+      'btc',
+      "m/48'/0'/0'/2'/0/0",
+      {
+        multisig: {
+          threshold: 1,
+          xpubs: [
+            'ypub6WqXiL3fbDK5QNPe3hN4uSVkEvuE8wXoNCcecgggSuKVpU3Kc4fTvhuLgUhtnbAdaTb9gpz5PQdvzcsKPTLgW2CPkF5ZNRzQeKFT4NSc1xN',
+          ],
+          ourXpubIndex: 0,
+          scriptType: 'p2wsh',
+        },
+      },
+      false,
+    )).rejects.toMatchObject({ code: 'invalid-type' });
+    expect(query).not.toHaveBeenCalled();
+  });
+
+  it('parses the PSBT before applying the firmware gate', async () => {
+    const { bitbox, query } = paired('9.14.0');
+    await expect(bitbox.btcSignPSBT('btc', 'not a PSBT', undefined, 'default'))
+      .rejects.toMatchObject({ code: 'psbt-parse' });
+    await expect(bitbox.btcSignPSBT('btc', validPsbt, undefined, 'default'))
+      .rejects.toMatchObject({
+        code: 'version',
+        message: 'firmware version >=9.15.0 required',
+      });
+    expect(query).not.toHaveBeenCalled();
+  });
+
+  it('validates PSBT options before querying the device', async () => {
+    const { bitbox, query } = paired();
+    await expect(bitbox.btcSignPSBT(
+      'doge' as 'btc',
+      validPsbt,
+      undefined,
+      'default',
+    )).rejects.toMatchObject({ code: 'invalid-type' });
+    await expect(bitbox.btcSignPSBT(
+      'btc',
+      validPsbt,
+      undefined,
+      'bits' as 'default',
+    )).rejects.toMatchObject({ code: 'invalid-type' });
+    await expect(bitbox.btcSignPSBT(
+      'btc',
+      validPsbt,
+      { scriptConfig: { simpleType: 'legacy' as 'p2wpkh' }, keypath: [] },
+      'default',
+    )).rejects.toMatchObject({ code: 'invalid-type' });
+    expect(query).not.toHaveBeenCalled();
+  });
+
+  it('gates message signing before querying the device', async () => {
+    const { bitbox, query } = paired('9.4.9');
+    await expect(bitbox.btcSignMessage(
+      'btc',
+      {
+        scriptConfig: { simpleType: 'p2wpkh' },
+        keypath: "m/84'/0'/0'/0/0",
+      },
+      new TextEncoder().encode('message'),
+    )).rejects.toMatchObject({
+      code: 'version',
+      message: 'firmware version >=9.5.0 required',
+    });
+    expect(query).not.toHaveBeenCalled();
+  });
+});
diff --git a/test/btc-psbt.test.ts b/test/btc-psbt.test.ts
new file mode 100644
index 0000000..22ab857
--- /dev/null
+++ b/test/btc-psbt.test.ts
@@ -0,0 +1,111 @@
+// SPDX-License-Identifier: Apache-2.0
+
+import {
+  address,
+  initEccLib,
+  opcodes,
+  script as bitcoinScript,
+} from 'bitcoinjs-lib';
+import { hexToBytes } from '@noble/hashes/utils';
+import * as ecc from 'tiny-secp256k1';
+import { describe, expect, it } from 'vitest';
+import {
+  parsePsbt,
+  payloadFromPkscript,
+} from '../src/internal/btc/psbt.js';
+import { BTCOutputType } from '../src/proto/gen/btc_pb.js';
+
+initEccLib(ecc);
+
+describe('Bitcoin output scripts', () => {
+  it.each([
+    [
+      '1AMZK8xzHJWsuRErpGZTiW4jKz8fdfLUGE',
+      BTCOutputType.P2PKH,
+      20,
+    ],
+    [
+      '3JFL8CgtV4ZtMFYeP5LgV4JppLkHw5Gw9T',
+      BTCOutputType.P2SH,
+      20,
+    ],
+    [
+      'bc1qkl8ms75cq6ajxtny7e88z3u9hkpkvktt5jwh6u',
+      BTCOutputType.P2WPKH,
+      20,
+    ],
+    [
+      'bc1q2fhgukymf0caaqrhfxrdju4wm94wwrch2ukntl5fuc0faz8zm49q0h6ss8',
+      BTCOutputType.P2WSH,
+      32,
+    ],
+    [
+      'bc1p5cyxnuxmeuwuvkwfem96lqzszd02n6xdcjrs20cac6yqjjwudpxqkedrcr',
+      BTCOutputType.P2TR,
+      32,
+    ],
+  ] as const)('parses %s', (encodedAddress, outputType, payloadLength) => {
+    const payload = payloadFromPkscript(address.toOutputScript(encodedAddress));
+    expect(payload.outputType).toBe(outputType);
+    expect(payload.data).toHaveLength(payloadLength);
+  });
+
+  it('parses empty, direct-push, and PUSHDATA1 OP_RETURN outputs', () => {
+    expect(payloadFromPkscript(hexToBytes('6a00'))).toEqual({
+      data: new Uint8Array(),
+      outputType: BTCOutputType.OP_RETURN,
+    });
+    expect(payloadFromPkscript(hexToBytes('6a03aabbcc'))).toEqual({
+      data: hexToBytes('aabbcc'),
+      outputType: BTCOutputType.OP_RETURN,
+    });
+    const eightyBytes = new Uint8Array(80).fill(0xaa);
+    expect(payloadFromPkscript(bitcoinScript.compile([
+      opcodes.OP_RETURN,
+      eightyBytes,
+    ]))).toEqual({
+      data: eightyBytes,
+      outputType: BTCOutputType.OP_RETURN,
+    });
+  });
+
+  it.each([
+    ['6a', 'naked OP_RETURN'],
+    ['6a6a', 'no data push'],
+    ['6a0000', 'only one data push'],
+    ['6a4c03aabbcc', 'failed to parse'],
+  ])('rejects invalid OP_RETURN script %s', (script, message) => {
+    try {
+      payloadFromPkscript(hexToBytes(script));
+      throw new Error('expected payload parsing to fail');
+    } catch (error) {
+      expect(error).toMatchObject({
+        code: 'psbt-invalid-op-return',
+      });
+      expect((error as Error).message).toContain(message);
+    }
+  });
+
+  it('rejects unknown output scripts', () => {
+    expect(() => payloadFromPkscript(hexToBytes('51'))).toThrowError();
+    try {
+      payloadFromPkscript(hexToBytes('51'));
+    } catch (error) {
+      expect(error).toMatchObject({ code: 'psbt-unknown-output-type' });
+    }
+
+    const nonMinimalP2tr = `514c20${'00'.repeat(32)}`;
+    expect(() => payloadFromPkscript(hexToBytes(nonMinimalP2tr))).toThrowError();
+  });
+});
+
+describe('parsePsbt', () => {
+  it('maps bitcoinjs-lib parser failures to psbt-parse', () => {
+    try {
+      parsePsbt('not a PSBT');
+      throw new Error('expected PSBT parsing to fail');
+    } catch (error) {
+      expect(error).toMatchObject({ code: 'psbt-parse' });
+    }
+  });
+});
diff --git a/test/data/btc-transaction-test-vectors.json b/test/data/btc-transaction-test-vectors.json
new file mode 100644
index 0000000..43d1d50
--- /dev/null
+++ b/test/data/btc-transaction-test-vectors.json
@@ -0,0 +1,4858 @@
+{
+  "simulator_seed": "boring mistake dish oyster truth pigeon viable emerge sort crash wire portion cannon couple enact box walk height pull today solid off enable tide",
+  "vectors": [
+    {
+      "id": "taproot-key-spend",
+      "description": "Signs two BIP86 Taproot key-spend inputs and recognizes a BIP86 change output.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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"
+      },
+      "expected_needs_prevtxs": false,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 400.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1pff8vkq80pu2cgtu7ttgad2znw62v2lguhw6ptrppwns6nrpqau2qcuz37d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "1.00000000 TBTC",
+              "fee": "0.80000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 400.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1p ff8v kq80 pu2c gtu7 ttga d2zn w62v 2lgu hw6p trpp wns6 nrpq au2q cuz3 7d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "1.00000000 TBTC",
+              "fee": "0.80000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 400.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "taproot_key",
+          "pubkey": "6c9e72468f297c110e46bfedd7ffe83ab20470a1ae6a7fc13ccf94986541292e",
+          "sighash": "default"
+        },
+        {
+          "input_index": 1,
+          "kind": "taproot_key",
+          "pubkey": "9e2a4b40d2c021b903ca48aa305545f56716f5c85e998bdc677d968a40574343",
+          "sighash": "default"
+        }
+      ]
+    },
+    {
+      "id": "mixed-spend",
+      "description": "Signs P2TR, native P2WPKH and nested P2SH-P2WPKH inputs from one previous transaction and recognizes BIP86 change.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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"
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 900.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1pff8vkq80pu2cgtu7ttgad2znw62v2lguhw6ptrppwns6nrpqau2qcuz37d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "2.00000000 TBTC",
+              "fee": "1.80000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 900.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1p ff8v kq80 pu2c gtu7 ttga d2zn w62v 2lgu hw6p trpp wns6 nrpq au2q cuz3 7d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "2.00000000 TBTC",
+              "fee": "1.80000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 900.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "taproot_key",
+          "pubkey": "6c9e72468f297c110e46bfedd7ffe83ab20470a1ae6a7fc13ccf94986541292e",
+          "sighash": "default"
+        },
+        {
+          "input_index": 1,
+          "kind": "ecdsa",
+          "pubkey": "03a9a6f11db052a402ccd0e2a2a31c4ad196b93db5b1ad1a3bdf8f23882d42b3c3",
+          "sighash": "all"
+        },
+        {
+          "input_index": 2,
+          "kind": "ecdsa",
+          "pubkey": "0329b834de159b7b1ff5d2bcc4b10ba2611169dff448a59df7f0c84c2c54b9b7d0",
+          "sighash": "all"
+        }
+      ]
+    },
+    {
+      "id": "op-return",
+      "description": "Signs a P2WPKH spend with a zero-value OP_RETURN output containing one printable data push and a P2WPKH change output.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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"
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.24.0",
+          "outcome": "unsupported",
+          "unsupported_version": "9.24.0",
+          "screens": []
+        },
+        {
+          "min_version": "9.24.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "OP_RETURN",
+              "body": "hello world",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.01000000 TBTC",
+              "fee": "0.01000000 TBTC",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "ecdsa",
+          "pubkey": "02e62431dfc2aa92e24d23118f8f078894ee118271ddc13715c5bd33d7d2ffe229",
+          "sighash": "all"
+        }
+      ]
+    },
+    {
+      "id": "multisig-p2wsh",
+      "description": "Signs the device branch of a registered 1-of-2 sortedmulti P2WSH input, recognizes descriptor-derived change, and finalizes the witness.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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",
+        "options": {
+          "force_script_config": {
+            "script_config": {
+              "type": "multisig",
+              "threshold": 1,
+              "xpubs": [
+                "xpub6EhivkawbkKDRT9Z59WwqhAzZZe7NQhxPgYc67nHbagRxoSbKEiZ6x4P4bE6s48GHvAHaGH8hsQfJ4RSSeNbVdYp7Kii2UGWKn8x2bQDtiR",
+                "tpubDFgycCkexSxkdZfeyaasDHityE97kiYM1BeCNoivDHvydGugKtoNobt4vEX6YSHNPy2cqmWQHKjKxciJuocepsGPGxcDZVmiMBnxgA1JKQk"
+              ],
+              "our_xpub_index": 0,
+              "script_type": "p2wsh"
+            },
+            "keypath": "m/48'/1'/0'/2'"
+          }
+        }
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "1-of-2\nBTC Testnet multisig",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "test wsh multisig",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "1-of-2\nBTC Testnet multisig",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "test wsh multisig",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1pff8vkq80pu2cgtu7ttgad2znw62v2lguhw6ptrppwns6nrpqau2qcuz37d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "1-of-2\nBTC Testnet multisig",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "test wsh multisig",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1p ff8v kq80 pu2c gtu7 ttga d2zn w62v 2lgu hw6p trpp wns6 nrpq au2q cuz3 7d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "registrations": [
+        {
+          "script_config": {
+            "type": "multisig",
+            "threshold": 1,
+            "xpubs": [
+              "xpub6EhivkawbkKDRT9Z59WwqhAzZZe7NQhxPgYc67nHbagRxoSbKEiZ6x4P4bE6s48GHvAHaGH8hsQfJ4RSSeNbVdYp7Kii2UGWKn8x2bQDtiR",
+              "tpubDFgycCkexSxkdZfeyaasDHityE97kiYM1BeCNoivDHvydGugKtoNobt4vEX6YSHNPy2cqmWQHKjKxciJuocepsGPGxcDZVmiMBnxgA1JKQk"
+            ],
+            "our_xpub_index": 0,
+            "script_type": "p2wsh"
+          },
+          "keypath": "m/48'/1'/0'/2'",
+          "name": "test wsh multisig"
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "ecdsa",
+          "pubkey": "039fb11f1394842eeeadd04ec165f713c49cb875443da2bc05d994ec118d7d1fde",
+          "sighash": "all"
+        }
+      ]
+    },
+    {
+      "id": "policy-wsh",
+      "description": "Signs the device branch of a registered BIP388 WSH or-policy and recognizes descriptor-derived change.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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",
+        "options": {
+          "force_script_config": {
+            "script_config": {
+              "type": "policy",
+              "policy": "wsh(or_b(pk(@0/<0;1>/*),s:pk(@1/<0;1>/*)))",
+              "keys": [
+                {
+                  "root_fingerprint": "4c00739d",
+                  "keypath": "m/48'/1'/0'/3'",
+                  "xpub": "xpub6EhivkawbkKDTyZXUfDUntyKvkx4fcniJY3RRMdcvvkKTEt7gX7CfotifBsm1iDYzLpRk9pspB6g2r2sjxVePkCScgDmkPiGUAWg2ESMKNA"
+                },
+                {
+                  "xpub": "tpubDFgycCkexSxkdZfeyaasDHityE97kiYM1BeCNoivDHvydGugKtoNobt4vEX6YSHNPy2cqmWQHKjKxciJuocepsGPGxcDZVmiMBnxgA1JKQk"
+                }
+              ]
+            },
+            "keypath": "m/48'/1'/0'/3'"
+          }
+        }
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "BTC Testnet\npolicy with\n2 keys",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Name",
+              "body": "test wsh policy",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Show policy\ndetails?",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Policy",
+              "body": "wsh(or_b(pk(@0/<0;1>/*),s:pk(@1/<0;1>/*)))",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 1/2",
+              "body": "This device: [4c00739d/48'/1'/0'/3']tpubDF5MSzQdK2GfjmkNvrCZzpJhFt3if1HmrAdimugmGqWDCXYpkjxHpFZYuDxYYDAnnFMLMjLkMGvij2XV8pLtHBejgGy5RvNW4875nFGBDWv",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 2/2",
+              "body": "tpubDFgycCkexSxkdZfeyaasDHityE97kiYM1BeCNoivDHvydGugKtoNobt4vEX6YSHNPy2cqmWQHKjKxciJuocepsGPGxcDZVmiMBnxgA1JKQk",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "BTC Testnet\npolicy with\n2 keys",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Name",
+              "body": "test wsh policy",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Show policy\ndetails?",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Policy",
+              "body": "wsh(or_b(pk(@0/<0;1>/*),s:pk(@1/<0;1>/*)))",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 1/2",
+              "body": "This device: [4c00739d/48'/1'/0'/3']tpubDF5MSzQdK2GfjmkNvrCZzpJhFt3if1HmrAdimugmGqWDCXYpkjxHpFZYuDxYYDAnnFMLMjLkMGvij2XV8pLtHBejgGy5RvNW4875nFGBDWv",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 2/2",
+              "body": "tpubDFgycCkexSxkdZfeyaasDHityE97kiYM1BeCNoivDHvydGugKtoNobt4vEX6YSHNPy2cqmWQHKjKxciJuocepsGPGxcDZVmiMBnxgA1JKQk",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1pff8vkq80pu2cgtu7ttgad2znw62v2lguhw6ptrppwns6nrpqau2qcuz37d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "BTC Testnet\npolicy with\n2 keys",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Name",
+              "body": "test wsh policy",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Show policy\ndetails?",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Policy",
+              "body": "wsh(or_b(pk(@0/<0;1>/*),s:pk(@1/<0;1>/*)))",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 1/2",
+              "body": "This device: [4c00739d/48'/1'/0'/3']tpubDF5MSzQdK2GfjmkNvrCZzpJhFt3if1HmrAdimugmGqWDCXYpkjxHpFZYuDxYYDAnnFMLMjLkMGvij2XV8pLtHBejgGy5RvNW4875nFGBDWv",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 2/2",
+              "body": "tpubDFgycCkexSxkdZfeyaasDHityE97kiYM1BeCNoivDHvydGugKtoNobt4vEX6YSHNPy2cqmWQHKjKxciJuocepsGPGxcDZVmiMBnxgA1JKQk",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1p ff8v kq80 pu2c gtu7 ttga d2zn w62v 2lgu hw6p trpp wns6 nrpq au2q cuz3 7d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "registrations": [
+        {
+          "script_config": {
+            "type": "policy",
+            "policy": "wsh(or_b(pk(@0/<0;1>/*),s:pk(@1/<0;1>/*)))",
+            "keys": [
+              {
+                "root_fingerprint": "4c00739d",
+                "keypath": "m/48'/1'/0'/3'",
+                "xpub": "xpub6EhivkawbkKDTyZXUfDUntyKvkx4fcniJY3RRMdcvvkKTEt7gX7CfotifBsm1iDYzLpRk9pspB6g2r2sjxVePkCScgDmkPiGUAWg2ESMKNA"
+              },
+              {
+                "xpub": "tpubDFgycCkexSxkdZfeyaasDHityE97kiYM1BeCNoivDHvydGugKtoNobt4vEX6YSHNPy2cqmWQHKjKxciJuocepsGPGxcDZVmiMBnxgA1JKQk"
+              }
+            ]
+          },
+          "name": "test wsh policy"
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "ecdsa",
+          "pubkey": "033a1712b41eb509147fbbd80c3fac4af4ad0f0eaeaef36e6e08918002afd8e9b2",
+          "sighash": "all"
+        }
+      ]
+    },
+    {
+      "id": "policy-tr-keyspend",
+      "description": "Signs the key-spend path of a registered BIP388 Taproot policy using only a witness UTXO and recognizes descriptor-derived change.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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",
+        "options": {
+          "force_script_config": {
+            "script_config": {
+              "type": "policy",
+              "policy": "tr(@0/<0;1>/*)",
+              "keys": [
+                {
+                  "root_fingerprint": "4c00739d",
+                  "keypath": "m/48'/1'/0'/3'",
+                  "xpub": "xpub6EhivkawbkKDTyZXUfDUntyKvkx4fcniJY3RRMdcvvkKTEt7gX7CfotifBsm1iDYzLpRk9pspB6g2r2sjxVePkCScgDmkPiGUAWg2ESMKNA"
+                }
+              ]
+            },
+            "keypath": "m/48'/1'/0'/3'"
+          }
+        }
+      },
+      "expected_needs_prevtxs": false,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.21.0",
+          "outcome": "unsupported",
+          "unsupported_version": "9.21.0",
+          "screens": []
+        },
+        {
+          "min_version": "9.21.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "BTC Testnet\npolicy with\n1 keys",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Name",
+              "body": "test tr keyspend policy",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Show policy\ndetails?",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Policy",
+              "body": "tr(@0/<0;1>/*)",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 1/1",
+              "body": "This device: [4c00739d/48'/1'/0'/3']tpubDF5MSzQdK2GfjmkNvrCZzpJhFt3if1HmrAdimugmGqWDCXYpkjxHpFZYuDxYYDAnnFMLMjLkMGvij2XV8pLtHBejgGy5RvNW4875nFGBDWv",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1pff8vkq80pu2cgtu7ttgad2znw62v2lguhw6ptrppwns6nrpqau2qcuz37d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "BTC Testnet\npolicy with\n1 keys",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Name",
+              "body": "test tr keyspend policy",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Show policy\ndetails?",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Policy",
+              "body": "tr(@0/<0;1>/*)",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 1/1",
+              "body": "This device: [4c00739d/48'/1'/0'/3']tpubDF5MSzQdK2GfjmkNvrCZzpJhFt3if1HmrAdimugmGqWDCXYpkjxHpFZYuDxYYDAnnFMLMjLkMGvij2XV8pLtHBejgGy5RvNW4875nFGBDWv",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1p ff8v kq80 pu2c gtu7 ttga d2zn w62v 2lgu hw6p trpp wns6 nrpq au2q cuz3 7d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "registrations": [
+        {
+          "script_config": {
+            "type": "policy",
+            "policy": "tr(@0/<0;1>/*)",
+            "keys": [
+              {
+                "root_fingerprint": "4c00739d",
+                "keypath": "m/48'/1'/0'/3'",
+                "xpub": "xpub6EhivkawbkKDTyZXUfDUntyKvkx4fcniJY3RRMdcvvkKTEt7gX7CfotifBsm1iDYzLpRk9pspB6g2r2sjxVePkCScgDmkPiGUAWg2ESMKNA"
+              }
+            ]
+          },
+          "name": "test tr keyspend policy"
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "taproot_key",
+          "pubkey": "3a1712b41eb509147fbbd80c3fac4af4ad0f0eaeaef36e6e08918002afd8e9b2",
+          "sighash": "default"
+        }
+      ]
+    },
+    {
+      "id": "policy-tr-scriptspend",
+      "description": "Signs the script path owned by the device in a registered BIP388 Taproot policy whose internal key belongs to another signer.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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",
+        "options": {
+          "force_script_config": {
+            "script_config": {
+              "type": "policy",
+              "policy": "tr(@0/<0;1>/*,pk(@1/<0;1>/*))",
+              "keys": [
+                {
+                  "xpub": "tpubDFgycCkexSxkdZfeyaasDHityE97kiYM1BeCNoivDHvydGugKtoNobt4vEX6YSHNPy2cqmWQHKjKxciJuocepsGPGxcDZVmiMBnxgA1JKQk"
+                },
+                {
+                  "root_fingerprint": "4c00739d",
+                  "keypath": "m/48'/1'/0'/3'",
+                  "xpub": "xpub6EhivkawbkKDTyZXUfDUntyKvkx4fcniJY3RRMdcvvkKTEt7gX7CfotifBsm1iDYzLpRk9pspB6g2r2sjxVePkCScgDmkPiGUAWg2ESMKNA"
+                }
+              ]
+            },
+            "keypath": "m/48'/1'/0'/3'"
+          }
+        }
+      },
+      "expected_needs_prevtxs": false,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.21.0",
+          "outcome": "unsupported",
+          "unsupported_version": "9.21.0",
+          "screens": []
+        },
+        {
+          "min_version": "9.21.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "BTC Testnet\npolicy with\n2 keys",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Name",
+              "body": "test tr scriptspend policy",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Show policy\ndetails?",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Policy",
+              "body": "tr(@0/<0;1>/*,pk(@1/<0;1>/*))",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 1/2",
+              "body": "tpubDFgycCkexSxkdZfeyaasDHityE97kiYM1BeCNoivDHvydGugKtoNobt4vEX6YSHNPy2cqmWQHKjKxciJuocepsGPGxcDZVmiMBnxgA1JKQk",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 2/2",
+              "body": "This device: [4c00739d/48'/1'/0'/3']tpubDF5MSzQdK2GfjmkNvrCZzpJhFt3if1HmrAdimugmGqWDCXYpkjxHpFZYuDxYYDAnnFMLMjLkMGvij2XV8pLtHBejgGy5RvNW4875nFGBDWv",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1pff8vkq80pu2cgtu7ttgad2znw62v2lguhw6ptrppwns6nrpqau2qcuz37d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "BTC Testnet\npolicy with\n2 keys",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Name",
+              "body": "test tr scriptspend policy",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Show policy\ndetails?",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Policy",
+              "body": "tr(@0/<0;1>/*,pk(@1/<0;1>/*))",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 1/2",
+              "body": "tpubDFgycCkexSxkdZfeyaasDHityE97kiYM1BeCNoivDHvydGugKtoNobt4vEX6YSHNPy2cqmWQHKjKxciJuocepsGPGxcDZVmiMBnxgA1JKQk",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 2/2",
+              "body": "This device: [4c00739d/48'/1'/0'/3']tpubDF5MSzQdK2GfjmkNvrCZzpJhFt3if1HmrAdimugmGqWDCXYpkjxHpFZYuDxYYDAnnFMLMjLkMGvij2XV8pLtHBejgGy5RvNW4875nFGBDWv",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1p ff8v kq80 pu2c gtu7 ttga d2zn w62v 2lgu hw6p trpp wns6 nrpq au2q cuz3 7d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "registrations": [
+        {
+          "script_config": {
+            "type": "policy",
+            "policy": "tr(@0/<0;1>/*,pk(@1/<0;1>/*))",
+            "keys": [
+              {
+                "xpub": "tpubDFgycCkexSxkdZfeyaasDHityE97kiYM1BeCNoivDHvydGugKtoNobt4vEX6YSHNPy2cqmWQHKjKxciJuocepsGPGxcDZVmiMBnxgA1JKQk"
+              },
+              {
+                "root_fingerprint": "4c00739d",
+                "keypath": "m/48'/1'/0'/3'",
+                "xpub": "xpub6EhivkawbkKDTyZXUfDUntyKvkx4fcniJY3RRMdcvvkKTEt7gX7CfotifBsm1iDYzLpRk9pspB6g2r2sjxVePkCScgDmkPiGUAWg2ESMKNA"
+              }
+            ]
+          },
+          "name": "test tr scriptspend policy"
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "taproot_script",
+          "pubkey": "3a1712b41eb509147fbbd80c3fac4af4ad0f0eaeaef36e6e08918002afd8e9b2",
+          "leaf_hash": "c3aa2951885f3ddabebfba4eb4873dbdb2c41e287562d542cf8782e2a857071b",
+          "sighash": "default"
+        }
+      ]
+    },
+    {
+      "id": "taproot-to-non-taproot-change",
+      "description": "Signs all-Taproot inputs with P2WPKH change, requiring previous transactions for the added non-Taproot output config.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "70736274ff0100a60200000002f8e60a3e44fa93f5d7a7b57dc5983aac5d50f84071772938b4ddff45ce9bf3270000000000fffffffff8e60a3e44fa93f5d7a7b57dc5983aac5d50f84071772938b4ddff45ce9bf3270100000000ffffffff0200e1f505000000001600149e2597ee0b2fbffec6275bd6cab7d2b4737b6e95002d3101000000002251204a4ecb00ef0f15842f9e5ad1d6a8537694c57d1cbbb4158c2174e1a98c20ef140000000000010089020000000131313131313131313131313131313131313131313131313131313131313131310000000000ffffffff0200e1f505000000002251205745c9989285350a6aa88c88f6fb3c43e6bcce823446a0920eb3bc6a93995f1a00e1f5050000000022512036c6a3ef943986e3fdfb7d5a750ae013f746966f6fe0971d3bdc7360f29db4220000000001012b00e1f505000000002251205745c9989285350a6aa88c88f6fb3c43e6bcce823446a0920eb3bc6a93995f1a21166c9e72468f297c110e46bfedd7ffe83ab20470a1ae6a7fc13ccf94986541292e19004c00739d56000080010000800000008000000000000000000117206c9e72468f297c110e46bfedd7ffe83ab20470a1ae6a7fc13ccf94986541292e00010089020000000131313131313131313131313131313131313131313131313131313131313131310000000000ffffffff0200e1f505000000002251205745c9989285350a6aa88c88f6fb3c43e6bcce823446a0920eb3bc6a93995f1a00e1f5050000000022512036c6a3ef943986e3fdfb7d5a750ae013f746966f6fe0971d3bdc7360f29db4220000000001012b00e1f5050000000022512036c6a3ef943986e3fdfb7d5a750ae013f746966f6fe0971d3bdc7360f29db42221169e2a4b40d2c021b903ca48aa305545f56716f5c85e998bdc677d968a4057434319004c00739d56000080010000800000008000000000010000000117209e2a4b40d2c021b903ca48aa305545f56716f5c85e998bdc677d968a4057434300220202dca870342cf7bc12c2d6c23dc6a0761160b1ff54e820be4b48c8f3ba9a8dc239184c00739d54000080010000800000008001000000000000000000"
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 400.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1pff8vkq80pu2cgtu7ttgad2znw62v2lguhw6ptrppwns6nrpqau2qcuz37d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "1.00000000 TBTC",
+              "fee": "0.80000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 400.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1p ff8v kq80 pu2c gtu7 ttga d2zn w62v 2lgu hw6p trpp wns6 nrpq au2q cuz3 7d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "1.00000000 TBTC",
+              "fee": "0.80000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 400.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "taproot_key",
+          "pubkey": "6c9e72468f297c110e46bfedd7ffe83ab20470a1ae6a7fc13ccf94986541292e",
+          "sighash": "default"
+        },
+        {
+          "input_index": 1,
+          "kind": "taproot_key",
+          "pubkey": "9e2a4b40d2c021b903ca48aa305545f56716f5c85e998bdc677d968a40574343",
+          "sighash": "default"
+        }
+      ]
+    },
+    {
+      "id": "silent-payment",
+      "description": "Signs mixed inputs with BIP352 metadata and a device-generated silent-payment output.",
+      "coin": "btc",
+      "psbt": {
+        "transaction": "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",
+        "options": {
+          "outputs": {
+            "1": {
+              "silent_payment_address": "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjuexzk6murw56suy3e0rd2cgqvycxttddwsvgxe2usfpxumr70xc9pkqwv"
+            }
+          }
+        }
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.21.0",
+          "outcome": "unsupported",
+          "unsupported_version": "9.21.0",
+          "screens": []
+        },
+        {
+          "min_version": "9.21.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 BTC",
+              "address": "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjuexzk6murw56suy3e0rd2cgqvycxttddwsvgxe2usfpxumr70xc9pkqwv"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "2.00000000 BTC",
+              "fee": "1.80000000 BTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 900.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 BTC",
+              "address": "sp1q qgst e7k9 hx0q ftg6 qmwl kqtw uy6c ycya vzmz j85c 6qdf hjdp djtd gqju exzk 6mur w56s uy3e 0rd2 cgqv ycxt tddw svgx e2us fpxu mr70 xc9p kqwv"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "2.00000000 BTC",
+              "fee": "1.80000000 BTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 900.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "taproot_key",
+          "pubkey": "cd47d5291421bd92a7dd849beb7f0d13f1c7c98067e3c23ff98de62c1ff09527",
+          "sighash": "default"
+        },
+        {
+          "input_index": 1,
+          "kind": "ecdsa",
+          "pubkey": "02c6f297dd7bcc0a38a527b3f2289cf91816cae2845a605080fd5fc9af4a945048",
+          "sighash": "all"
+        },
+        {
+          "input_index": 2,
+          "kind": "ecdsa",
+          "pubkey": "03d47c62767f5463ffc008b9250fa6bb7eac11f2aff84804cf19d80ea46922bd73",
+          "sighash": "all"
+        }
+      ],
+      "expected_generated_outputs": {
+        "1": "5120d826829cb603fc008e5ef99d0818f2126d3569c3ab8a6cd069f07a20e892bd59"
+      }
+    },
+    {
+      "id": "send-self-same-account",
+      "description": "Covers ownership detection for the input account, suppression of change confirmation and version-specific account labels.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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"
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 150.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.22.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "This BitBox02: tb1ql34ny8mcpgjqr0ngsnjmlpzjpgncyz2ygh2gye"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.50000000 TBTC",
+              "fee": "0.30000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 150.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.22.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "This BitBox (same account): tb1ql34ny8mcpgjqr0ngsnjmlpzjpgncyz2ygh2gye"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.50000000 TBTC",
+              "fee": "0.30000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 150.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "This BitBox (same account): tb1q l34n y8mc pgjq r0ng snjm lpzj pgnc yz2y gh2g ye"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.50000000 TBTC",
+              "fee": "0.30000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 150.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "taproot_key",
+          "pubkey": "6c9e72468f297c110e46bfedd7ffe83ab20470a1ae6a7fc13ccf94986541292e",
+          "sighash": "default"
+        }
+      ]
+    },
+    {
+      "id": "send-self-different-account",
+      "description": "Covers ownership detection for another account and version-specific account labels.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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"
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 150.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.22.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1qvrcm2akp30d7ecnqdjk8qdu09962ak005rcp6j"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.50000000 TBTC",
+              "fee": "0.30000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 150.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.22.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "This BitBox (account #2): tb1qvrcm2akp30d7ecnqdjk8qdu09962ak005rcp6j"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.50000000 TBTC",
+              "fee": "0.30000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 150.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "This BitBox (account #2): tb1q vrcm 2akp 30d7 ecnq djk8 qdu0 9962 ak00 5rcp 6j"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.50000000 TBTC",
+              "fee": "0.30000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 150.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "taproot_key",
+          "pubkey": "6c9e72468f297c110e46bfedd7ffe83ab20470a1ae6a7fc13ccf94986541292e",
+          "sighash": "default"
+        }
+      ]
+    },
+    {
+      "id": "payment-request",
+      "description": "Covers signed SLIP-24 payment-request metadata, merchant and multiline memo screens, address suppression and the pre-v9.24 simulator merchant limitation.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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",
+        "options": {
+          "outputs": {
+            "1": {
+              "payment_request_index": 0
+            }
+          },
+          "payment_requests": [
+            {
+              "recipient_name": "Test Merchant",
+              "total_amount": 20000000,
+              "memos": [
+                {
+                  "type": "text",
+                  "note": "TextMemo line1\nTextMemo line2"
+                }
+              ],
+              "signature": "3e67d38390b3d32938bd3e3c8f239b201efc278fedadf371bea9561c94da89ea450ad806eeae079983babd8158ac9c7c6a3c12e589435e7535a571d562f9f337"
+            }
+          ]
+        }
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.24.0",
+          "outcome": "invalid_input",
+          "screens": []
+        },
+        {
+          "min_version": "9.24.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "Test Merchant"
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Memo from\n\nTest Merchant",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Memo 1/2",
+              "body": "TextMemo line1",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Memo 2/2",
+              "body": "TextMemo line2",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.50000000 TBTC",
+              "fee": "0.30000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 150.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "taproot_key",
+          "pubkey": "6c9e72468f297c110e46bfedd7ffe83ab20470a1ae6a7fc13ccf94986541292e",
+          "sighash": "default"
+        }
+      ]
+    },
+    {
+      "id": "payment-request-owned-output",
+      "description": "Covers version-specific handling of payment-request metadata attached to an output owned by this device, rejected since v9.26.3.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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",
+        "options": {
+          "outputs": {
+            "1": {
+              "payment_request_index": 0
+            }
+          },
+          "payment_requests": [
+            {
+              "recipient_name": "Test Merchant",
+              "total_amount": 20000000,
+              "memos": [
+                {
+                  "type": "text",
+                  "note": "TextMemo line1\nTextMemo line2"
+                }
+              ],
+              "signature": "4e7837fadb6a322439108c295906d50229f5fd79a1624957e12eeb171cf4ceed36b854ba948ed2630ec89b38aec462b06ed236ea32fa74ad9040dadf430712cd"
+            }
+          ]
+        }
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.24.0",
+          "outcome": "invalid_input",
+          "screens": []
+        },
+        {
+          "min_version": "9.24.0",
+          "max_version_exclusive": "9.26.3",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "Test Merchant"
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Memo from\n\nTest Merchant",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Memo 1/2",
+              "body": "TextMemo line1",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Memo 2/2",
+              "body": "TextMemo line2",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.3",
+          "outcome": "invalid_input",
+          "screens": []
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "taproot_key",
+          "pubkey": "6c9e72468f297c110e46bfedd7ffe83ab20470a1ae6a7fc13ccf94986541292e",
+          "sighash": "default"
+        }
+      ]
+    },
+    {
+      "id": "multiple-output-types-bitcoin-coin",
+      "description": "Displays P2PKH, P2SH, P2WPKH and P2WSH recipients, warns about two change outputs, and signs the transaction.",
+      "coin": "btc",
+      "psbt": {
+        "transaction": "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"
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Warning",
+              "body": "There are 2\nchange outputs.\nProceed?",
+              "longtouch": false
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "1.00000000 BTC",
+              "address": "12ZEw5Hcv1hTb6YUQJ69y1V7uhcoDz92PH"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "12.34567890 BTC",
+              "address": "34oVnh4gNviJGMnNvgquMeLAxvXJuaRVMZ"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.00006000 BTC",
+              "address": "bc1qxvenxvenxvenxvenxvenxvenxvenxven2ymjt8"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.00007000 BTC",
+              "address": "bc1qg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zqd8sxw4"
+            },
+            {
+              "type": "confirm",
+              "title": "Warning",
+              "body": "There are 2\nchange outputs.\nProceed?",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "13.39999900 BTC",
+              "fee": "0.05419010 BTC",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "1.00000000 BTC",
+              "address": "12ZE w5Hc v1hT b6YU QJ69 y1V7 uhco Dz92 PH"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "12.34567890 BTC",
+              "address": "34oV nh4g NviJ GMnN vgqu MeLA xvXJ uaRV MZ"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.00006000 BTC",
+              "address": "bc1q xven xven xven xven xven xven xven xven 2ymj t8"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.00007000 BTC",
+              "address": "bc1q g3zy g3zy g3zy g3zy g3zy g3zy g3zy g3zy g3zy g3zy g3zy g3zy g3zq d8sx w4"
+            },
+            {
+              "type": "confirm",
+              "title": "Warning",
+              "body": "There are 2\nchange outputs.\nProceed?",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "13.39999900 BTC",
+              "fee": "0.05419010 BTC",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "ecdsa",
+          "pubkey": "0218f980e27a3f46860d15cbeb0aba08ed32bf5de22be5a3b80e26cfec5727eb1d",
+          "sighash": "all"
+        }
+      ]
+    },
+    {
+      "id": "multiple-output-types-bitcoin-satoshi",
+      "description": "Displays P2PKH, P2SH, P2WPKH and P2WSH recipients, warns about two change outputs, and signs the transaction.",
+      "coin": "btc",
+      "psbt": {
+        "transaction": "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",
+        "options": {
+          "format_unit": "sat"
+        }
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Warning",
+              "body": "There are 2\nchange outputs.\nProceed?",
+              "longtouch": false
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "100000000 sat",
+              "address": "12ZEw5Hcv1hTb6YUQJ69y1V7uhcoDz92PH"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "1234567890 sat",
+              "address": "34oVnh4gNviJGMnNvgquMeLAxvXJuaRVMZ"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "6000 sat",
+              "address": "bc1qxvenxvenxvenxvenxvenxvenxvenxven2ymjt8"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "7000 sat",
+              "address": "bc1qg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zqd8sxw4"
+            },
+            {
+              "type": "confirm",
+              "title": "Warning",
+              "body": "There are 2\nchange outputs.\nProceed?",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "1339999900 sat",
+              "fee": "5419010 sat",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "100000000 sat",
+              "address": "12ZE w5Hc v1hT b6YU QJ69 y1V7 uhco Dz92 PH"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "1234567890 sat",
+              "address": "34oV nh4g NviJ GMnN vgqu MeLA xvXJ uaRV MZ"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "6000 sat",
+              "address": "bc1q xven xven xven xven xven xven xven xven 2ymj t8"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "7000 sat",
+              "address": "bc1q g3zy g3zy g3zy g3zy g3zy g3zy g3zy g3zy g3zy g3zy g3zy g3zy g3zq d8sx w4"
+            },
+            {
+              "type": "confirm",
+              "title": "Warning",
+              "body": "There are 2\nchange outputs.\nProceed?",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "1339999900 sat",
+              "fee": "5419010 sat",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "ecdsa",
+          "pubkey": "0218f980e27a3f46860d15cbeb0aba08ed32bf5de22be5a3b80e26cfec5727eb1d",
+          "sighash": "all"
+        }
+      ]
+    },
+    {
+      "id": "multiple-output-types-litecoin-coin",
+      "description": "Displays P2PKH, P2SH, P2WPKH and P2WSH recipients, warns about two change outputs, and signs the transaction.",
+      "coin": "ltc",
+      "psbt": {
+        "transaction": "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"
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Warning",
+              "body": "There are 2\nchange outputs.\nProceed?",
+              "longtouch": false
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "1.00000000 LTC",
+              "address": "LLnCCHbSzfwWquEdaS5TF2Yt7uz5Qb1SZ1"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "12.34567890 LTC",
+              "address": "MB1e6aUeL3Zj4s4H2ZqFBHaaHd7kvvzTco"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.00006000 LTC",
+              "address": "ltc1qxvenxvenxvenxvenxvenxvenxvenxvenwcpknh"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.00007000 LTC",
+              "address": "ltc1qg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zqwr7k5s"
+            },
+            {
+              "type": "confirm",
+              "title": "Warning",
+              "body": "There are 2\nchange outputs.\nProceed?",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "13.39999900 LTC",
+              "fee": "0.05419010 LTC",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "1.00000000 LTC",
+              "address": "LLnC CHbS zfwW quEd aS5T F2Yt 7uz5 Qb1S Z1"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "12.34567890 LTC",
+              "address": "MB1e 6aUe L3Zj 4s4H 2ZqF BHaa Hd7k vvzT co"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.00006000 LTC",
+              "address": "ltc1 qxve nxve nxve nxve nxve nxve nxve nxve nwcp knh"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.00007000 LTC",
+              "address": "ltc1 qg3z yg3z yg3z yg3z yg3z yg3z yg3z yg3z yg3z yg3z yg3z yg3z yg3z qwr7 k5s"
+            },
+            {
+              "type": "confirm",
+              "title": "Warning",
+              "body": "There are 2\nchange outputs.\nProceed?",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "13.39999900 LTC",
+              "fee": "0.05419010 LTC",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "ecdsa",
+          "pubkey": "02bad6b8353f8ad1cc4cfc775b05ab9f834a1d132ac36e4cafdc43d8c2c99ebc46",
+          "sighash": "all"
+        }
+      ]
+    },
+    {
+      "id": "high-fee-rounding",
+      "description": "Displays the 18.1% high-fee warning and requires the final longtouch on the warning instead of the fee screen.",
+      "coin": "btc",
+      "psbt": {
+        "transaction": "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"
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Warning",
+              "body": "There are 2\nchange outputs.\nProceed?",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 18.1%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "1.00000000 BTC",
+              "address": "12ZEw5Hcv1hTb6YUQJ69y1V7uhcoDz92PH"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "10.34567890 BTC",
+              "address": "34oVnh4gNviJGMnNvgquMeLAxvXJuaRVMZ"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.00006000 BTC",
+              "address": "bc1qxvenxvenxvenxvenxvenxvenxvenxven2ymjt8"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.00007000 BTC",
+              "address": "bc1qg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zyg3zqd8sxw4"
+            },
+            {
+              "type": "confirm",
+              "title": "Warning",
+              "body": "There are 2\nchange outputs.\nProceed?",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "13.39999900 BTC",
+              "fee": "2.05419010 BTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 18.1%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "1.00000000 BTC",
+              "address": "12ZE w5Hc v1hT b6YU QJ69 y1V7 uhco Dz92 PH"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "10.34567890 BTC",
+              "address": "34oV nh4g NviJ GMnN vgqu MeLA xvXJ uaRV MZ"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.00006000 BTC",
+              "address": "bc1q xven xven xven xven xven xven xven xven 2ymj t8"
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.00007000 BTC",
+              "address": "bc1q g3zy g3zy g3zy g3zy g3zy g3zy g3zy g3zy g3zy g3zy g3zy g3zy g3zq d8sx w4"
+            },
+            {
+              "type": "confirm",
+              "title": "Warning",
+              "body": "There are 2\nchange outputs.\nProceed?",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "13.39999900 BTC",
+              "fee": "2.05419010 BTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 18.1%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "ecdsa",
+          "pubkey": "0218f980e27a3f46860d15cbeb0aba08ed32bf5de22be5a3b80e26cfec5727eb1d",
+          "sighash": "all"
+        }
+      ]
+    },
+    {
+      "id": "swap-payment-request",
+      "description": "Displays and signs a Bitcoin-to-Ethereum coin-purchase payment request.",
+      "coin": "btc",
+      "psbt": {
+        "transaction": "70736274ff01007d0200000001013018e6e997b8e9b80d0244f11e3c68ba7107d8bb9a359a16a9a796d64e85550000000000ffffffff02801d2c04000000001600141133a71526b176aac7b2462bc5bff36abe68a18a002d310100000000225120da28dbf53b86ae59ae156af3745bb326f44ce309dda97345708c8d3dd45755a6000000000001005202000000010000000000000000000000000000000000000000000000000000000000000000ffffffff00ffffffff0100e1f50500000000160014fc8c96dd45eed60d714647d787e74d2b33b5ae9b0000000001011f00e1f50500000000160014fc8c96dd45eed60d714647d787e74d2b33b5ae9b220602c6f297dd7bcc0a38a527b3f2289cf91816cae2845a605080fd5fc9af4a945048184c00739d5400008000000080000000800000000000000000002202034fc8251f3b2e939dccf75db7c9edf0e8cbc88ec662c0119e961e586ebebe3731184c00739d54000080000000800000008001000000000000000000",
+        "options": {
+          "outputs": {
+            "1": {
+              "payment_request_index": 0
+            }
+          },
+          "payment_requests": [
+            {
+              "recipient_name": "Test Merchant",
+              "total_amount": 20000000,
+              "memos": [
+                {
+                  "type": "coin_purchase",
+                  "coin_type": 60,
+                  "amount": "0.25 ETH",
+                  "address": "0x416E88840Eb6353E49252Da2a2c140eA1f969D1a",
+                  "address_keypath": "m/44'/60'/0'/0/0"
+                }
+              ],
+              "signature": "917d3514b2358406730f42952efe0a873255788314a9cf2906474c1e2cefd8cb0e35791ef8211463d37a007e3d9d3a0ec11736250b7e089156c53e5ebf40413d"
+            }
+          ]
+        }
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.24.0",
+          "outcome": "invalid_input",
+          "screens": []
+        },
+        {
+          "min_version": "9.24.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "invalid_input",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 BTC",
+              "address": "Test Merchant"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 BTC",
+              "address": "Test Merchant"
+            },
+            {
+              "type": "swap",
+              "title": "Swap",
+              "from": "0.20000000 BTC",
+              "to": "0.25 ETH"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 BTC",
+              "fee": "0.10000000 BTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "ecdsa",
+          "pubkey": "02c6f297dd7bcc0a38a527b3f2289cf91816cae2845a605080fd5fc9af4a945048",
+          "sighash": "all"
+        }
+      ]
+    },
+    {
+      "id": "swap-payment-request-unsupported-source",
+      "description": "Rejects a coin-purchase payment request whose source account is Bitcoin testnet.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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",
+        "options": {
+          "outputs": {
+            "1": {
+              "payment_request_index": 0
+            }
+          },
+          "payment_requests": [
+            {
+              "recipient_name": "Test Merchant",
+              "total_amount": 20000000,
+              "memos": [
+                {
+                  "type": "coin_purchase",
+                  "coin_type": 60,
+                  "amount": "0.25 ETH",
+                  "address": "0x416E88840Eb6353E49252Da2a2c140eA1f969D1a",
+                  "address_keypath": "m/44'/60'/0'/0/0"
+                }
+              ],
+              "signature": "c231191f200c3259f71a509dc644b49ab14332fdde4b63a12aaa19b744f188f872e7c60cc6a7e5823acb1f849659e16664fbf2680749bd2101b33cdb49bb8dce"
+            }
+          ]
+        }
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.24.0",
+          "outcome": "invalid_input",
+          "screens": []
+        },
+        {
+          "min_version": "9.24.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "invalid_input",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "Test Merchant"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "invalid_input",
+          "screens": []
+        }
+      ]
+    },
+    {
+      "id": "p2wpkh-p2sh",
+      "description": "Signs a nested SegWit input and recognizes nested SegWit change.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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"
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1pff8vkq80pu2cgtu7ttgad2znw62v2lguhw6ptrppwns6nrpqau2qcuz37d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1p ff8v kq80 pu2c gtu7 ttga d2zn w62v 2lgu hw6p trpp wns6 nrpq au2q cuz3 7d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "ecdsa",
+          "pubkey": "0329b834de159b7b1ff5d2bcc4b10ba2611169dff448a59df7f0c84c2c54b9b7d0",
+          "sighash": "all"
+        }
+      ]
+    },
+    {
+      "id": "high-input-address-index",
+      "description": "Spends an owned input at address index 100000 without treating the high spend path as a receive-address verification request.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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"
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1pff8vkq80pu2cgtu7ttgad2znw62v2lguhw6ptrppwns6nrpqau2qcuz37d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1p ff8v kq80 pu2c gtu7 ttga d2zn w62v 2lgu hw6p trpp wns6 nrpq au2q cuz3 7d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "ecdsa",
+          "pubkey": "03ce6f00e8e7302e323faf1f26ce2584307cb1bcef2a2b2140c6013c67bb9b991b",
+          "sighash": "all"
+        }
+      ]
+    },
+    {
+      "id": "locktime-zero",
+      "description": "Suppresses the locktime confirmation when locktime is zero even if the sequence signals RBF.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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"
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1pff8vkq80pu2cgtu7ttgad2znw62v2lguhw6ptrppwns6nrpqau2qcuz37d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1p ff8v kq80 pu2c gtu7 ttga d2zn w62v 2lgu hw6p trpp wns6 nrpq au2q cuz3 7d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "ecdsa",
+          "pubkey": "03a9a6f11db052a402ccd0e2a2a31c4ad196b93db5b1ad1a3bdf8f23882d42b3c3",
+          "sighash": "all"
+        }
+      ]
+    },
+    {
+      "id": "locktime-non-rbf",
+      "description": "Displays block locktime 10 and its non-rbf sequence semantics.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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"
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Locktime on block:\n10\nTransaction is not RBF",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1pff8vkq80pu2cgtu7ttgad2znw62v2lguhw6ptrppwns6nrpqau2qcuz37d"
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Locktime on block:\n10\nTransaction is not RBF",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1p ff8v kq80 pu2c gtu7 ttga d2zn w62v 2lgu hw6p trpp wns6 nrpq au2q cuz3 7d"
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Locktime on block:\n10\nTransaction is not RBF",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "ecdsa",
+          "pubkey": "03a9a6f11db052a402ccd0e2a2a31c4ad196b93db5b1ad1a3bdf8f23882d42b3c3",
+          "sighash": "all"
+        }
+      ]
+    },
+    {
+      "id": "locktime-rbf",
+      "description": "Displays block locktime 10 and its rbf sequence semantics.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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"
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Locktime on block:\n10\nTransaction is RBF",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1pff8vkq80pu2cgtu7ttgad2znw62v2lguhw6ptrppwns6nrpqau2qcuz37d"
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Locktime on block:\n10\nTransaction is RBF",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1p ff8v kq80 pu2c gtu7 ttga d2zn w62v 2lgu hw6p trpp wns6 nrpq au2q cuz3 7d"
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Locktime on block:\n10\nTransaction is RBF",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "ecdsa",
+          "pubkey": "03a9a6f11db052a402ccd0e2a2a31c4ad196b93db5b1ad1a3bdf8f23882d42b3c3",
+          "sighash": "all"
+        }
+      ]
+    },
+    {
+      "id": "locktime-litecoin-non-rbf-sequence",
+      "description": "Displays a Litecoin block locktime without Bitcoin-specific RBF wording.",
+      "coin": "ltc",
+      "psbt": {
+        "transaction": "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"
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Locktime on block:\n10\n",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 LTC",
+              "address": "ltc1qw508d6qejxtdg4y5r3zarvary0c5xw7kgmn4n9"
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Locktime on block:\n10\n",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 LTC",
+              "fee": "0.10000000 LTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 LTC",
+              "address": "ltc1 qw50 8d6q ejxt dg4y 5r3z arva ry0c 5xw7 kgmn 4n9"
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Locktime on block:\n10\n",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 LTC",
+              "fee": "0.10000000 LTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "ecdsa",
+          "pubkey": "032780e5412e19ac486f2be57004bc34d0f9957468bfa2b0fa1c8e689819d97df2",
+          "sighash": "all"
+        }
+      ]
+    },
+    {
+      "id": "locktime-litecoin-rbf-sequence",
+      "description": "Displays a Litecoin block locktime without Bitcoin-specific RBF wording.",
+      "coin": "ltc",
+      "psbt": {
+        "transaction": "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"
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Locktime on block:\n10\n",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 LTC",
+              "address": "ltc1qw508d6qejxtdg4y5r3zarvary0c5xw7kgmn4n9"
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Locktime on block:\n10\n",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 LTC",
+              "fee": "0.10000000 LTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 LTC",
+              "address": "ltc1 qw50 8d6q ejxt dg4y 5r3z arva ry0c 5xw7 kgmn 4n9"
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Locktime on block:\n10\n",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 LTC",
+              "fee": "0.10000000 LTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "ecdsa",
+          "pubkey": "032780e5412e19ac486f2be57004bc34d0f9957468bfa2b0fa1c8e689819d97df2",
+          "sighash": "all"
+        }
+      ]
+    },
+    {
+      "id": "p2tr-output-mainnet",
+      "description": "Displays and signs a mainnet P2TR recipient output from a native SegWit account.",
+      "coin": "btc",
+      "psbt": {
+        "transaction": "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"
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 BTC",
+              "address": "bc1pmg5dhafms6h9nts4dtehgkanym6yeccfmk5hx3ts3jxnm4zh2knqv80ha5"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 BTC",
+              "fee": "0.10000000 BTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 BTC",
+              "address": "bc1p mg5d hafm s6h9 nts4 dteh gkan ym6y eccf mk5h x3ts 3jxn m4zh 2knq v80h a5"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 BTC",
+              "fee": "0.10000000 BTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "ecdsa",
+          "pubkey": "02c6f297dd7bcc0a38a527b3f2289cf91816cae2845a605080fd5fc9af4a945048",
+          "sighash": "all"
+        }
+      ]
+    },
+    {
+      "id": "silent-payment-owned-output",
+      "description": "Covers version-specific handling of silent-payment metadata attached to an output owned by this device, rejected since v9.26.3.",
+      "coin": "btc",
+      "psbt": {
+        "transaction": "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",
+        "options": {
+          "outputs": {
+            "1": {
+              "silent_payment_address": "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjuexzk6murw56suy3e0rd2cgqvycxttddwsvgxe2usfpxumr70xc9pkqwv"
+            }
+          }
+        }
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.21.0",
+          "outcome": "unsupported",
+          "unsupported_version": "9.21.0",
+          "screens": []
+        },
+        {
+          "min_version": "9.21.0",
+          "max_version_exclusive": "9.22.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 BTC",
+              "address": "This BitBox02: sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjuexzk6murw56suy3e0rd2cgqvycxttddwsvgxe2usfpxumr70xc9pkqwv"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 BTC",
+              "fee": "0.10000000 BTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.22.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 BTC",
+              "address": "This BitBox (same account): sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjuexzk6murw56suy3e0rd2cgqvycxttddwsvgxe2usfpxumr70xc9pkqwv"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 BTC",
+              "fee": "0.10000000 BTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "max_version_exclusive": "9.26.3",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 BTC",
+              "address": "This BitBox (same account): sp1q qgst e7k9 hx0q ftg6 qmwl kqtw uy6c ycya vzmz j85c 6qdf hjdp djtd gqju exzk 6mur w56s uy3e 0rd2 cgqv ycxt tddw svgx e2us fpxu mr70 xc9p kqwv"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 BTC",
+              "fee": "0.10000000 BTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.3",
+          "outcome": "invalid_input",
+          "screens": []
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "taproot_key",
+          "pubkey": "cd47d5291421bd92a7dd849beb7f0d13f1c7c98067e3c23ff98de62c1ff09527",
+          "sighash": "default"
+        }
+      ]
+    },
+    {
+      "id": "op-return-nonascii",
+      "description": "Displays a non-ASCII OP_RETURN payload as hexadecimal and signs the transaction.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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"
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.24.0",
+          "outcome": "unsupported",
+          "unsupported_version": "9.24.0",
+          "screens": []
+        },
+        {
+          "min_version": "9.24.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "OP_RETURN\ndata (hex)",
+              "body": "0102030405",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1pff8vkq80pu2cgtu7ttgad2znw62v2lguhw6ptrppwns6nrpqau2qcuz37d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "OP_RETURN\ndata (hex)",
+              "body": "0102030405",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1p ff8v kq80 pu2c gtu7 ttga d2zn w62v 2lgu hw6p trpp wns6 nrpq au2q cuz3 7d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "ecdsa",
+          "pubkey": "03a9a6f11db052a402ccd0e2a2a31c4ad196b93db5b1ad1a3bdf8f23882d42b3c3",
+          "sighash": "all"
+        }
+      ]
+    },
+    {
+      "id": "op-return-nonzero-value",
+      "description": "Rejects a nonzero-value OP_RETURN output.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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"
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.24.0",
+          "outcome": "unsupported",
+          "unsupported_version": "9.24.0",
+          "screens": []
+        },
+        {
+          "min_version": "9.24.0",
+          "outcome": "invalid_input",
+          "screens": []
+        }
+      ]
+    },
+    {
+      "id": "op-return-silent-payment",
+      "description": "Rejects silent-payment metadata on an OP_RETURN output.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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",
+        "options": {
+          "outputs": {
+            "0": {
+              "silent_payment_address": "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjuexzk6murw56suy3e0rd2cgqvycxttddwsvgxe2usfpxumr70xc9pkqwv"
+            }
+          }
+        }
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.24.0",
+          "outcome": "unsupported",
+          "unsupported_version": "9.24.0",
+          "screens": []
+        },
+        {
+          "min_version": "9.24.0",
+          "outcome": "invalid_input",
+          "screens": []
+        }
+      ]
+    },
+    {
+      "id": "op-return-payment-request",
+      "description": "Rejects payment-request metadata on an OP_RETURN output.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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",
+        "options": {
+          "outputs": {
+            "0": {
+              "payment_request_index": 0
+            }
+          },
+          "payment_requests": [
+            {
+              "recipient_name": "Test Merchant",
+              "total_amount": 1,
+              "memos": [
+                {
+                  "type": "text",
+                  "note": "TextMemo line1\nTextMemo line2"
+                }
+              ],
+              "signature": "93582744d5fab8b70cd2f1686bb7baf76e2797f095a83a6029f04c8c92d11bca4f274a71ef0ac79ce65b87241feb770823a1525d64f85e69104081d6ad397601"
+            }
+          ]
+        }
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.24.0",
+          "outcome": "unsupported",
+          "unsupported_version": "9.24.0",
+          "screens": []
+        },
+        {
+          "min_version": "9.24.0",
+          "outcome": "invalid_input",
+          "screens": []
+        }
+      ]
+    },
+    {
+      "id": "multisig-not-registered",
+      "description": "Rejects a valid 1-of-2 P2WSH multisig transaction when its account has not been registered.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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",
+        "options": {
+          "force_script_config": {
+            "script_config": {
+              "type": "multisig",
+              "threshold": 1,
+              "xpubs": [
+                "xpub6EhivkawbkKDRT9Z59WwqhAzZZe7NQhxPgYc67nHbagRxoSbKEiZ6x4P4bE6s48GHvAHaGH8hsQfJ4RSSeNbVdYp7Kii2UGWKn8x2bQDtiR",
+                "tpubDFX8u4cajvyZrQGikAfBcRt5EqVj4C9xB1HEQSZfN5weSUq4ULeMra6GXY8fM6hwgBX3WZ8TCP7nvMQu3hM4zvUHqWPhU9oq8HNV4ixboTz"
+              ],
+              "our_xpub_index": 0,
+              "script_type": "p2wsh"
+            },
+            "keypath": "m/48'/1'/0'/2'"
+          }
+        }
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "outcome": "invalid_input",
+          "screens": []
+        }
+      ]
+    },
+    {
+      "id": "multisig-p2wsh-p2sh",
+      "description": "Signs and finalizes a registered 1-of-2 nested P2SH-P2WSH multisig transaction.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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",
+        "options": {
+          "force_script_config": {
+            "script_config": {
+              "type": "multisig",
+              "threshold": 1,
+              "xpubs": [
+                "xpub6EhivkawbkKDNQtJHZFjbd79dLGtC1yTcWn7WHPaCdpa8jXS8mU4y9tdYqzhrUVt3w6QR6vjx66nbUX4s2Hw5V5oer76XzKpRVMExC7zpLG",
+                "tpubDFX8u4cajvyZqUGS5AVgPb7GUpAJJ5nbkVMnw1m2ajrHaZmknbxuWDac2P2zyiB35UcgqwmVAeVzGEVV9qbji6tzYRCTiWwPGvtUULR4DLM"
+              ],
+              "our_xpub_index": 0,
+              "script_type": "p2wsh_p2sh"
+            },
+            "keypath": "m/48'/1'/0'/1'"
+          }
+        }
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "1-of-2\nBTC Testnet multisig",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "test sh-wsh multisig",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "1-of-2\nBTC Testnet multisig",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "test sh-wsh multisig",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1pff8vkq80pu2cgtu7ttgad2znw62v2lguhw6ptrppwns6nrpqau2qcuz37d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "1-of-2\nBTC Testnet multisig",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "test sh-wsh multisig",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1p ff8v kq80 pu2c gtu7 ttga d2zn w62v 2lgu hw6p trpp wns6 nrpq au2q cuz3 7d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "registrations": [
+        {
+          "script_config": {
+            "type": "multisig",
+            "threshold": 1,
+            "xpubs": [
+              "xpub6EhivkawbkKDNQtJHZFjbd79dLGtC1yTcWn7WHPaCdpa8jXS8mU4y9tdYqzhrUVt3w6QR6vjx66nbUX4s2Hw5V5oer76XzKpRVMExC7zpLG",
+              "tpubDFX8u4cajvyZqUGS5AVgPb7GUpAJJ5nbkVMnw1m2ajrHaZmknbxuWDac2P2zyiB35UcgqwmVAeVzGEVV9qbji6tzYRCTiWwPGvtUULR4DLM"
+            ],
+            "our_xpub_index": 0,
+            "script_type": "p2wsh_p2sh"
+          },
+          "keypath": "m/48'/1'/0'/1'",
+          "name": "test sh-wsh multisig"
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "ecdsa",
+          "pubkey": "03f506dd0e67b1d3f035a6055961a3ac5510dff004069e9d025930338fd8e20c88",
+          "sighash": "all"
+        }
+      ]
+    },
+    {
+      "id": "multisig-large",
+      "description": "Adds the seventh signature to a registered 7-of-15 P2WSH multisig transaction whose PSBT already contains six cosigner signatures.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": 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+        "options": {
+          "force_script_config": {
+            "script_config": {
+              "type": "multisig",
+              "threshold": 7,
+              "xpubs": [
+                "xpub6EhivkawbkKDRT9Z59WwqhAzZZe7NQhxPgYc67nHbagRxoSbKEiZ6x4P4bE6s48GHvAHaGH8hsQfJ4RSSeNbVdYp7Kii2UGWKn8x2bQDtiR",
+                "tpubDFX8u4cajvyZrQGikAfBcRt5EqVj4C9xB1HEQSZfN5weSUq4ULeMra6GXY8fM6hwgBX3WZ8TCP7nvMQu3hM4zvUHqWPhU9oq8HNV4ixboTz",
+                "tpubDFCqK5T7J3FUasUXA1xsminXkeaPSxe1id2K4KCEaszuTNKERymaiZHTnUcjGDf4b57XinAHauwSh1uDRmNVMtfhiStJWsf83MZLA1tC5qi",
+                "tpubDEKEr89i7dBFXrrpkK2KZQy9aMw6Dg8idr1ysbZJ94mWk6uaFAy4DmYMw7LMDSEaeSJdAcgshdLATcbr6T9hQoouRphfHC9aBQqiWAh8wRF",
+                "tpubDERfkonU8krEq7knZXFPFrS5bnbhsyXhV7wdM9agZuzD6YgM95LgBWKzAkPeZMseTWRj2PPcbw2kEjcrBctJEzLNUu2VLz1Fixehoc5z4aq",
+                "tpubDECMwLTAdWk5RcgKaaLKaP83R586xMFtBhH5osdzdF6VbEwFpQp3uiiaHrKGPnqmfDUKFtSQE5ForxoBYgJWEHA5B2T9i5GP5ZAuScWKXgH",
+                "tpubDEuxzYbnkbY2XHQZjzcDV2Vk4DH4oZwLefGso1jXfFsTyhVV5HxZvVUrSdGLc9AVBTNcCDZh5qw7RgPiibMfMVWtHpjzoErqJcvukzFSpbf",
+                "tpubDEccsjksu3ddEUnx5FkNADMy9YkLi3p6vQGpdgFDSypMfYZs7amRL94ucqyHGZrVDMrBc937ptj4SKihNiYJtnRgiZ742hpxfnAgynaQno5",
+                "tpubDF1U1F2s28Rv71bukRRTLUN3hiTgKDGjxGVrFAYXYo1qaWFNsUnA4MoyFtKoytQyLHfmE267HDo3VDgDUfk2hQwb3ary3aNojzkT1sTe5oi",
+                "tpubDF8LvKCNR3JMayQDTRRqBD3PLhVng5wk6bYvCpsrhe5Mffon2sSFrLBz9J3WCdLqsoeUjMiG1gqsiiM8RVNw6eSfqbRyFsSt2sZPd54GoVi",
+                "tpubDEgfQ9SqcnKyEkVmEEkx9AaQ3pZN1nSZQjZxtCcTVytAk62DggB6FiuH12cFeygFLgDPsYtBYDp8FCQDrdgZLrpp2cFhnsFur55kWid1DYg",
+                "tpubDEHvZYZJ5N3jGxHTJJ1LSWdoD3SUSSz7zUhUPLrTMC7SoEkthZVzfFz8qSYAYF1Rg6LjKTsBZMeNJivd4iDyjbQQ6JcyZe2eHB3WENiQECP",
+                "tpubDEjJyDs2yboyzkczJ5ADEmU9yJNqCgmpUPBqW5CVSPCxg8Q59ZwDqRCBwUrDmR29iY8BJGfBa5bq9MBhYpnqjaQvNQdFHqGX99W6ocPX63z",
+                "tpubDFFcidKjrkaTSz4R4s9Y5ijp3dzHkJ9XZ2JkLanjkUskBBbFvjxfQMeU5L52ANJtgpiMRyjK4WzJ6qkK22KQsScHbiQBEsstjVKLoxZynZm",
+                "tpubDF3ds3VKs6p4YjvSLY848WwW21fxiaYGdn5cZEUZ5CwKwMveavxSNA3GhJHqZkFkXa5DTeT1ZKjThtFY8KDfNAuvF95SDcXEoGXNq5bs9nT"
+              ],
+              "our_xpub_index": 0,
+              "script_type": "p2wsh"
+            },
+            "keypath": "m/48'/1'/0'/2'"
+          }
+        }
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "7-of-15\nBTC Testnet multisig",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "test large multisig",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "7-of-15\nBTC Testnet multisig",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "test large multisig",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1pff8vkq80pu2cgtu7ttgad2znw62v2lguhw6ptrppwns6nrpqau2qcuz37d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "7-of-15\nBTC Testnet multisig",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "test large multisig",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1p ff8v kq80 pu2c gtu7 ttga d2zn w62v 2lgu hw6p trpp wns6 nrpq au2q cuz3 7d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "registrations": [
+        {
+          "script_config": {
+            "type": "multisig",
+            "threshold": 7,
+            "xpubs": [
+              "xpub6EhivkawbkKDRT9Z59WwqhAzZZe7NQhxPgYc67nHbagRxoSbKEiZ6x4P4bE6s48GHvAHaGH8hsQfJ4RSSeNbVdYp7Kii2UGWKn8x2bQDtiR",
+              "tpubDFX8u4cajvyZrQGikAfBcRt5EqVj4C9xB1HEQSZfN5weSUq4ULeMra6GXY8fM6hwgBX3WZ8TCP7nvMQu3hM4zvUHqWPhU9oq8HNV4ixboTz",
+              "tpubDFCqK5T7J3FUasUXA1xsminXkeaPSxe1id2K4KCEaszuTNKERymaiZHTnUcjGDf4b57XinAHauwSh1uDRmNVMtfhiStJWsf83MZLA1tC5qi",
+              "tpubDEKEr89i7dBFXrrpkK2KZQy9aMw6Dg8idr1ysbZJ94mWk6uaFAy4DmYMw7LMDSEaeSJdAcgshdLATcbr6T9hQoouRphfHC9aBQqiWAh8wRF",
+              "tpubDERfkonU8krEq7knZXFPFrS5bnbhsyXhV7wdM9agZuzD6YgM95LgBWKzAkPeZMseTWRj2PPcbw2kEjcrBctJEzLNUu2VLz1Fixehoc5z4aq",
+              "tpubDECMwLTAdWk5RcgKaaLKaP83R586xMFtBhH5osdzdF6VbEwFpQp3uiiaHrKGPnqmfDUKFtSQE5ForxoBYgJWEHA5B2T9i5GP5ZAuScWKXgH",
+              "tpubDEuxzYbnkbY2XHQZjzcDV2Vk4DH4oZwLefGso1jXfFsTyhVV5HxZvVUrSdGLc9AVBTNcCDZh5qw7RgPiibMfMVWtHpjzoErqJcvukzFSpbf",
+              "tpubDEccsjksu3ddEUnx5FkNADMy9YkLi3p6vQGpdgFDSypMfYZs7amRL94ucqyHGZrVDMrBc937ptj4SKihNiYJtnRgiZ742hpxfnAgynaQno5",
+              "tpubDF1U1F2s28Rv71bukRRTLUN3hiTgKDGjxGVrFAYXYo1qaWFNsUnA4MoyFtKoytQyLHfmE267HDo3VDgDUfk2hQwb3ary3aNojzkT1sTe5oi",
+              "tpubDF8LvKCNR3JMayQDTRRqBD3PLhVng5wk6bYvCpsrhe5Mffon2sSFrLBz9J3WCdLqsoeUjMiG1gqsiiM8RVNw6eSfqbRyFsSt2sZPd54GoVi",
+              "tpubDEgfQ9SqcnKyEkVmEEkx9AaQ3pZN1nSZQjZxtCcTVytAk62DggB6FiuH12cFeygFLgDPsYtBYDp8FCQDrdgZLrpp2cFhnsFur55kWid1DYg",
+              "tpubDEHvZYZJ5N3jGxHTJJ1LSWdoD3SUSSz7zUhUPLrTMC7SoEkthZVzfFz8qSYAYF1Rg6LjKTsBZMeNJivd4iDyjbQQ6JcyZe2eHB3WENiQECP",
+              "tpubDEjJyDs2yboyzkczJ5ADEmU9yJNqCgmpUPBqW5CVSPCxg8Q59ZwDqRCBwUrDmR29iY8BJGfBa5bq9MBhYpnqjaQvNQdFHqGX99W6ocPX63z",
+              "tpubDFFcidKjrkaTSz4R4s9Y5ijp3dzHkJ9XZ2JkLanjkUskBBbFvjxfQMeU5L52ANJtgpiMRyjK4WzJ6qkK22KQsScHbiQBEsstjVKLoxZynZm",
+              "tpubDF3ds3VKs6p4YjvSLY848WwW21fxiaYGdn5cZEUZ5CwKwMveavxSNA3GhJHqZkFkXa5DTeT1ZKjThtFY8KDfNAuvF95SDcXEoGXNq5bs9nT"
+            ],
+            "our_xpub_index": 0,
+            "script_type": "p2wsh"
+          },
+          "keypath": "m/48'/1'/0'/2'",
+          "name": "test large multisig"
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "ecdsa",
+          "pubkey": "039fb11f1394842eeeadd04ec165f713c49cb875443da2bc05d994ec118d7d1fde",
+          "sighash": "all"
+        }
+      ]
+    },
+    {
+      "id": "policy-tr-keyspend-with-script-tree",
+      "description": "Signs a Taproot policy key path whose tweak commits to a script tree.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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",
+        "options": {
+          "force_script_config": {
+            "script_config": {
+              "type": "policy",
+              "policy": "tr(@0/**,pk(@1/**))",
+              "keys": [
+                {
+                  "root_fingerprint": "4c00739d",
+                  "keypath": "m/48'/1'/0'/3'",
+                  "xpub": "xpub6EhivkawbkKDTyZXUfDUntyKvkx4fcniJY3RRMdcvvkKTEt7gX7CfotifBsm1iDYzLpRk9pspB6g2r2sjxVePkCScgDmkPiGUAWg2ESMKNA"
+                },
+                {
+                  "xpub": "tpubDFfyBnQAERJZWHv4W5rrhkpKJnPjycGzBpv8H1WgFjpkK7bVpuKw6JkeNvXqJix6csrQP3QgPZ19Yed2kbc7sniVHtNiQkX3cHsBxEqnz7Y"
+                }
+              ]
+            },
+            "keypath": "m/48'/1'/0'/3'"
+          }
+        }
+      },
+      "expected_needs_prevtxs": false,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.21.0",
+          "outcome": "unsupported",
+          "unsupported_version": "9.21.0",
+          "screens": []
+        },
+        {
+          "min_version": "9.21.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "BTC Testnet\npolicy with\n2 keys",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Name",
+              "body": "test tr tweaked keyspend",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Show policy\ndetails?",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Policy",
+              "body": "tr(@0/**,pk(@1/**))",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 1/2",
+              "body": "This device: [4c00739d/48'/1'/0'/3']tpubDF5MSzQdK2GfjmkNvrCZzpJhFt3if1HmrAdimugmGqWDCXYpkjxHpFZYuDxYYDAnnFMLMjLkMGvij2XV8pLtHBejgGy5RvNW4875nFGBDWv",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 2/2",
+              "body": "tpubDFfyBnQAERJZWHv4W5rrhkpKJnPjycGzBpv8H1WgFjpkK7bVpuKw6JkeNvXqJix6csrQP3QgPZ19Yed2kbc7sniVHtNiQkX3cHsBxEqnz7Y",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1pff8vkq80pu2cgtu7ttgad2znw62v2lguhw6ptrppwns6nrpqau2qcuz37d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "BTC Testnet\npolicy with\n2 keys",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Name",
+              "body": "test tr tweaked keyspend",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Show policy\ndetails?",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Policy",
+              "body": "tr(@0/**,pk(@1/**))",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 1/2",
+              "body": "This device: [4c00739d/48'/1'/0'/3']tpubDF5MSzQdK2GfjmkNvrCZzpJhFt3if1HmrAdimugmGqWDCXYpkjxHpFZYuDxYYDAnnFMLMjLkMGvij2XV8pLtHBejgGy5RvNW4875nFGBDWv",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 2/2",
+              "body": "tpubDFfyBnQAERJZWHv4W5rrhkpKJnPjycGzBpv8H1WgFjpkK7bVpuKw6JkeNvXqJix6csrQP3QgPZ19Yed2kbc7sniVHtNiQkX3cHsBxEqnz7Y",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1p ff8v kq80 pu2c gtu7 ttga d2zn w62v 2lgu hw6p trpp wns6 nrpq au2q cuz3 7d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "registrations": [
+        {
+          "script_config": {
+            "type": "policy",
+            "policy": "tr(@0/**,pk(@1/**))",
+            "keys": [
+              {
+                "root_fingerprint": "4c00739d",
+                "keypath": "m/48'/1'/0'/3'",
+                "xpub": "xpub6EhivkawbkKDTyZXUfDUntyKvkx4fcniJY3RRMdcvvkKTEt7gX7CfotifBsm1iDYzLpRk9pspB6g2r2sjxVePkCScgDmkPiGUAWg2ESMKNA"
+              },
+              {
+                "xpub": "tpubDFfyBnQAERJZWHv4W5rrhkpKJnPjycGzBpv8H1WgFjpkK7bVpuKw6JkeNvXqJix6csrQP3QgPZ19Yed2kbc7sniVHtNiQkX3cHsBxEqnz7Y"
+              }
+            ]
+          },
+          "name": "test tr tweaked keyspend"
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "taproot_key",
+          "pubkey": "3a1712b41eb509147fbbd80c3fac4af4ad0f0eaeaef36e6e08918002afd8e9b2",
+          "sighash": "default"
+        }
+      ]
+    },
+    {
+      "id": "policy-tr-unspendable-internal-key",
+      "description": "Signs a Taproot script path with a provably unspendable internal key and displays that property in the policy review.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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",
+        "options": {
+          "force_script_config": {
+            "script_config": {
+              "type": "policy",
+              "policy": "tr(@0/<0;1>/*,multi_a(2,@1/<0;1>/*,@2/<0;1>/*))",
+              "keys": [
+                {
+                  "xpub": "tpubD6NzVbkrYhZ4XnyFMCH9qsN7VhcUSwyj5MN4juKrFBbgE9e3qCpEQsHSmq4zHA2FAkSwBQEzFGKjvXtb2xrRLioqRdqAkqN3Y9WrBf7yNj8"
+                },
+                {
+                  "xpub": "tpubDF93VcTYKK2grTowjbqJMst4gS19G6rtWTNKcBnxCpQfs2BaFShNYoBDisxqhTsBWj4YhigxVArhhZN43NyWBH4E3puXS7tCrHsbjb2dvBi"
+                },
+                {
+                  "root_fingerprint": "4c00739d",
+                  "keypath": "m/48'/1'/0'/3'",
+                  "xpub": "xpub6EhivkawbkKDTyZXUfDUntyKvkx4fcniJY3RRMdcvvkKTEt7gX7CfotifBsm1iDYzLpRk9pspB6g2r2sjxVePkCScgDmkPiGUAWg2ESMKNA"
+                }
+              ]
+            },
+            "keypath": "m/48'/1'/0'/3'"
+          }
+        }
+      },
+      "expected_needs_prevtxs": false,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.21.0",
+          "outcome": "unsupported",
+          "unsupported_version": "9.21.0",
+          "screens": []
+        },
+        {
+          "min_version": "9.21.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "BTC Testnet\npolicy with\n3 keys",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Name",
+              "body": "test unspendable policy",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Show policy\ndetails?",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Policy",
+              "body": "tr(@0/<0;1>/*,multi_a(2,@1/<0;1>/*,@2/<0;1>/*))",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 1/3",
+              "body": "Provably unspendable: tpubD6NzVbkrYhZ4XnyFMCH9qsN7VhcUSwyj5MN4juKrFBbgE9e3qCpEQsHSmq4zHA2FAkSwBQEzFGKjvXtb2xrRLioqRdqAkqN3Y9WrBf7yNj8",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 2/3",
+              "body": "tpubDF93VcTYKK2grTowjbqJMst4gS19G6rtWTNKcBnxCpQfs2BaFShNYoBDisxqhTsBWj4YhigxVArhhZN43NyWBH4E3puXS7tCrHsbjb2dvBi",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 3/3",
+              "body": "This device: [4c00739d/48'/1'/0'/3']tpubDF5MSzQdK2GfjmkNvrCZzpJhFt3if1HmrAdimugmGqWDCXYpkjxHpFZYuDxYYDAnnFMLMjLkMGvij2XV8pLtHBejgGy5RvNW4875nFGBDWv",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1pff8vkq80pu2cgtu7ttgad2znw62v2lguhw6ptrppwns6nrpqau2qcuz37d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "BTC Testnet\npolicy with\n3 keys",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Name",
+              "body": "test unspendable policy",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Show policy\ndetails?",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Policy",
+              "body": "tr(@0/<0;1>/*,multi_a(2,@1/<0;1>/*,@2/<0;1>/*))",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 1/3",
+              "body": "Provably unspendable: tpubD6NzVbkrYhZ4XnyFMCH9qsN7VhcUSwyj5MN4juKrFBbgE9e3qCpEQsHSmq4zHA2FAkSwBQEzFGKjvXtb2xrRLioqRdqAkqN3Y9WrBf7yNj8",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 2/3",
+              "body": "tpubDF93VcTYKK2grTowjbqJMst4gS19G6rtWTNKcBnxCpQfs2BaFShNYoBDisxqhTsBWj4YhigxVArhhZN43NyWBH4E3puXS7tCrHsbjb2dvBi",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 3/3",
+              "body": "This device: [4c00739d/48'/1'/0'/3']tpubDF5MSzQdK2GfjmkNvrCZzpJhFt3if1HmrAdimugmGqWDCXYpkjxHpFZYuDxYYDAnnFMLMjLkMGvij2XV8pLtHBejgGy5RvNW4875nFGBDWv",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1p ff8v kq80 pu2c gtu7 ttga d2zn w62v 2lgu hw6p trpp wns6 nrpq au2q cuz3 7d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "registrations": [
+        {
+          "script_config": {
+            "type": "policy",
+            "policy": "tr(@0/<0;1>/*,multi_a(2,@1/<0;1>/*,@2/<0;1>/*))",
+            "keys": [
+              {
+                "xpub": "tpubD6NzVbkrYhZ4XnyFMCH9qsN7VhcUSwyj5MN4juKrFBbgE9e3qCpEQsHSmq4zHA2FAkSwBQEzFGKjvXtb2xrRLioqRdqAkqN3Y9WrBf7yNj8"
+              },
+              {
+                "xpub": "tpubDF93VcTYKK2grTowjbqJMst4gS19G6rtWTNKcBnxCpQfs2BaFShNYoBDisxqhTsBWj4YhigxVArhhZN43NyWBH4E3puXS7tCrHsbjb2dvBi"
+              },
+              {
+                "root_fingerprint": "4c00739d",
+                "keypath": "m/48'/1'/0'/3'",
+                "xpub": "xpub6EhivkawbkKDTyZXUfDUntyKvkx4fcniJY3RRMdcvvkKTEt7gX7CfotifBsm1iDYzLpRk9pspB6g2r2sjxVePkCScgDmkPiGUAWg2ESMKNA"
+              }
+            ]
+          },
+          "name": "test unspendable policy"
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "taproot_script",
+          "pubkey": "3a1712b41eb509147fbbd80c3fac4af4ad0f0eaeaef36e6e08918002afd8e9b2",
+          "leaf_hash": "e0ed23b292365b738059122f0e9f6887887b474a1e9593cb55e872c7a0c08558",
+          "sighash": "default"
+        }
+      ]
+    },
+    {
+      "id": "policy-tr-unspendable-internal-key-complex",
+      "description": "Signs the satisfiable branch of a multi-leaf Taproot policy with a provably unspendable internal key, distinct multipaths and a relative-timelock sibling branch.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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",
+        "options": {
+          "force_script_config": {
+            "script_config": {
+              "type": "policy",
+              "policy": "tr(@0/<0;1>/*,{and_v(v:multi_a(1,@1/<2;3>/*,@2/<2;3>/*),older(2)),multi_a(2,@1/<0;1>/*,@2/<0;1>/*)})",
+              "keys": [
+                {
+                  "xpub": "tpubD6NzVbkrYhZ4YRYppNDw8BpfEz6cSU8qt45Eoqpj8YtPLFXoZsb3dYdAyLFp32GeY3b5ccVdtr45ajBGBDHgapb53xT9kMBcpHSF7yA8kXm"
+                },
+                {
+                  "root_fingerprint": "4040280c",
+                  "keypath": "m/48'/1'/0'/2'",
+                  "xpub": "tpubDEWR7iVng7GH7BhbVBa6avnELDTSWEWHtAethvSrYYLEFm1XB1qT4Fb9xkPGZ9S7zU1FFrpVc6wRSo5BRNYvDAP7Edr5a6FJSjeCt7tWgQR"
+                },
+                {
+                  "root_fingerprint": "4c00739d",
+                  "keypath": "m/48'/1'/0'/3'",
+                  "xpub": "xpub6EhivkawbkKDTyZXUfDUntyKvkx4fcniJY3RRMdcvvkKTEt7gX7CfotifBsm1iDYzLpRk9pspB6g2r2sjxVePkCScgDmkPiGUAWg2ESMKNA"
+                }
+              ]
+            },
+            "keypath": "m/48'/1'/0'/3'"
+          }
+        }
+      },
+      "expected_needs_prevtxs": false,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.21.0",
+          "outcome": "unsupported",
+          "unsupported_version": "9.21.0",
+          "screens": []
+        },
+        {
+          "min_version": "9.21.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "BTC Testnet\npolicy with\n3 keys",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Name",
+              "body": "test complex unspendable",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Show policy\ndetails?",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Policy",
+              "body": "tr(@0/<0;1>/*,{and_v(v:multi_a(1,@1/<2;3>/*,@2/<2;3>/*),older(2)),multi_a(2,@1/<0;1>/*,@2/<0;1>/*)})",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 1/3",
+              "body": "Provably unspendable: tpubD6NzVbkrYhZ4YRYppNDw8BpfEz6cSU8qt45Eoqpj8YtPLFXoZsb3dYdAyLFp32GeY3b5ccVdtr45ajBGBDHgapb53xT9kMBcpHSF7yA8kXm",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 2/3",
+              "body": "[4040280c/48'/1'/0'/2']tpubDEWR7iVng7GH7BhbVBa6avnELDTSWEWHtAethvSrYYLEFm1XB1qT4Fb9xkPGZ9S7zU1FFrpVc6wRSo5BRNYvDAP7Edr5a6FJSjeCt7tWgQR",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 3/3",
+              "body": "This device: [4c00739d/48'/1'/0'/3']tpubDF5MSzQdK2GfjmkNvrCZzpJhFt3if1HmrAdimugmGqWDCXYpkjxHpFZYuDxYYDAnnFMLMjLkMGvij2XV8pLtHBejgGy5RvNW4875nFGBDWv",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1pff8vkq80pu2cgtu7ttgad2znw62v2lguhw6ptrppwns6nrpqau2qcuz37d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "BTC Testnet\npolicy with\n3 keys",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Name",
+              "body": "test complex unspendable",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Show policy\ndetails?",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Policy",
+              "body": "tr(@0/<0;1>/*,{and_v(v:multi_a(1,@1/<2;3>/*,@2/<2;3>/*),older(2)),multi_a(2,@1/<0;1>/*,@2/<0;1>/*)})",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 1/3",
+              "body": "Provably unspendable: tpubD6NzVbkrYhZ4YRYppNDw8BpfEz6cSU8qt45Eoqpj8YtPLFXoZsb3dYdAyLFp32GeY3b5ccVdtr45ajBGBDHgapb53xT9kMBcpHSF7yA8kXm",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 2/3",
+              "body": "[4040280c/48'/1'/0'/2']tpubDEWR7iVng7GH7BhbVBa6avnELDTSWEWHtAethvSrYYLEFm1XB1qT4Fb9xkPGZ9S7zU1FFrpVc6wRSo5BRNYvDAP7Edr5a6FJSjeCt7tWgQR",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 3/3",
+              "body": "This device: [4c00739d/48'/1'/0'/3']tpubDF5MSzQdK2GfjmkNvrCZzpJhFt3if1HmrAdimugmGqWDCXYpkjxHpFZYuDxYYDAnnFMLMjLkMGvij2XV8pLtHBejgGy5RvNW4875nFGBDWv",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1p ff8v kq80 pu2c gtu7 ttga d2zn w62v 2lgu hw6p trpp wns6 nrpq au2q cuz3 7d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "registrations": [
+        {
+          "script_config": {
+            "type": "policy",
+            "policy": "tr(@0/<0;1>/*,{and_v(v:multi_a(1,@1/<2;3>/*,@2/<2;3>/*),older(2)),multi_a(2,@1/<0;1>/*,@2/<0;1>/*)})",
+            "keys": [
+              {
+                "xpub": "tpubD6NzVbkrYhZ4YRYppNDw8BpfEz6cSU8qt45Eoqpj8YtPLFXoZsb3dYdAyLFp32GeY3b5ccVdtr45ajBGBDHgapb53xT9kMBcpHSF7yA8kXm"
+              },
+              {
+                "root_fingerprint": "4040280c",
+                "keypath": "m/48'/1'/0'/2'",
+                "xpub": "tpubDEWR7iVng7GH7BhbVBa6avnELDTSWEWHtAethvSrYYLEFm1XB1qT4Fb9xkPGZ9S7zU1FFrpVc6wRSo5BRNYvDAP7Edr5a6FJSjeCt7tWgQR"
+              },
+              {
+                "root_fingerprint": "4c00739d",
+                "keypath": "m/48'/1'/0'/3'",
+                "xpub": "xpub6EhivkawbkKDTyZXUfDUntyKvkx4fcniJY3RRMdcvvkKTEt7gX7CfotifBsm1iDYzLpRk9pspB6g2r2sjxVePkCScgDmkPiGUAWg2ESMKNA"
+              }
+            ]
+          },
+          "name": "test complex unspendable"
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "taproot_script",
+          "pubkey": "3a1712b41eb509147fbbd80c3fac4af4ad0f0eaeaef36e6e08918002afd8e9b2",
+          "leaf_hash": "b2edc93766200490b5d77842a9424fd5686d22c4c14fb13dec8784164160521a",
+          "sighash": "default"
+        }
+      ]
+    },
+    {
+      "id": "policy-different-multipath-derivations",
+      "description": "Signs and finalizes a registered WSH policy whose two keys use different receive and change branches.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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",
+        "options": {
+          "force_script_config": {
+            "script_config": {
+              "type": "policy",
+              "policy": "wsh(multi(2,@0/<10;11>/*,@1/<20;21>/*))",
+              "keys": [
+                {
+                  "root_fingerprint": "4c00739d",
+                  "keypath": "m/48'/1'/0'/3'",
+                  "xpub": "xpub6EhivkawbkKDTyZXUfDUntyKvkx4fcniJY3RRMdcvvkKTEt7gX7CfotifBsm1iDYzLpRk9pspB6g2r2sjxVePkCScgDmkPiGUAWg2ESMKNA"
+                },
+                {
+                  "xpub": "tpubDFfyBnQAERJZWHv4W5rrhkpKJnPjycGzBpv8H1WgFjpkK7bVpuKw6JkeNvXqJix6csrQP3QgPZ19Yed2kbc7sniVHtNiQkX3cHsBxEqnz7Y"
+                }
+              ]
+            },
+            "keypath": "m/48'/1'/0'/3'"
+          }
+        }
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "max_version_exclusive": "9.20.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "BTC Testnet\npolicy with\n2 keys",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Name",
+              "body": "test multipath policy",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Show policy\ndetails?",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Policy",
+              "body": "wsh(multi(2,@0/<10;11>/*,@1/<20;21>/*))",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 1/2",
+              "body": "This device: [4c00739d/48'/1'/0'/3']tpubDF5MSzQdK2GfjmkNvrCZzpJhFt3if1HmrAdimugmGqWDCXYpkjxHpFZYuDxYYDAnnFMLMjLkMGvij2XV8pLtHBejgGy5RvNW4875nFGBDWv",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 2/2",
+              "body": "tpubDFfyBnQAERJZWHv4W5rrhkpKJnPjycGzBpv8H1WgFjpkK7bVpuKw6JkeNvXqJix6csrQP3QgPZ19Yed2kbc7sniVHtNiQkX3cHsBxEqnz7Y",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.20.0",
+          "max_version_exclusive": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "BTC Testnet\npolicy with\n2 keys",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Name",
+              "body": "test multipath policy",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Show policy\ndetails?",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Policy",
+              "body": "wsh(multi(2,@0/<10;11>/*,@1/<20;21>/*))",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 1/2",
+              "body": "This device: [4c00739d/48'/1'/0'/3']tpubDF5MSzQdK2GfjmkNvrCZzpJhFt3if1HmrAdimugmGqWDCXYpkjxHpFZYuDxYYDAnnFMLMjLkMGvij2XV8pLtHBejgGy5RvNW4875nFGBDWv",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 2/2",
+              "body": "tpubDFfyBnQAERJZWHv4W5rrhkpKJnPjycGzBpv8H1WgFjpkK7bVpuKw6JkeNvXqJix6csrQP3QgPZ19Yed2kbc7sniVHtNiQkX3cHsBxEqnz7Y",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1pff8vkq80pu2cgtu7ttgad2znw62v2lguhw6ptrppwns6nrpqau2qcuz37d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        },
+        {
+          "min_version": "9.26.0",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "BTC Testnet\npolicy with\n2 keys",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Name",
+              "body": "test multipath policy",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Show policy\ndetails?",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Policy",
+              "body": "wsh(multi(2,@0/<10;11>/*,@1/<20;21>/*))",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 1/2",
+              "body": "This device: [4c00739d/48'/1'/0'/3']tpubDF5MSzQdK2GfjmkNvrCZzpJhFt3if1HmrAdimugmGqWDCXYpkjxHpFZYuDxYYDAnnFMLMjLkMGvij2XV8pLtHBejgGy5RvNW4875nFGBDWv",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 2/2",
+              "body": "tpubDFfyBnQAERJZWHv4W5rrhkpKJnPjycGzBpv8H1WgFjpkK7bVpuKw6JkeNvXqJix6csrQP3QgPZ19Yed2kbc7sniVHtNiQkX3cHsBxEqnz7Y",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "tb1p ff8v kq80 pu2c gtu7 ttga d2zn w62v 2lgu hw6p trpp wns6 nrpq au2q cuz3 7d"
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.30000000 TBTC",
+              "fee": "0.10000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 50.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
+        }
+      ],
+      "registrations": [
+        {
+          "script_config": {
+            "type": "policy",
+            "policy": "wsh(multi(2,@0/<10;11>/*,@1/<20;21>/*))",
+            "keys": [
+              {
+                "root_fingerprint": "4c00739d",
+                "keypath": "m/48'/1'/0'/3'",
+                "xpub": "xpub6EhivkawbkKDTyZXUfDUntyKvkx4fcniJY3RRMdcvvkKTEt7gX7CfotifBsm1iDYzLpRk9pspB6g2r2sjxVePkCScgDmkPiGUAWg2ESMKNA"
+              },
+              {
+                "xpub": "tpubDFfyBnQAERJZWHv4W5rrhkpKJnPjycGzBpv8H1WgFjpkK7bVpuKw6JkeNvXqJix6csrQP3QgPZ19Yed2kbc7sniVHtNiQkX3cHsBxEqnz7Y"
+              }
+            ]
+          },
+          "name": "test multipath policy"
+        }
+      ],
+      "expected_signatures": [
+        {
+          "input_index": 0,
+          "kind": "ecdsa",
+          "pubkey": "02b95c8bf277d3e7d7de1ad4fbb4921c5bd1cefeb3ebf38987bdd4688b9cfcbb72",
+          "sighash": "all"
+        }
+      ]
+    },
+    {
+      "id": "policy-wrong-account-keypath",
+      "description": "Rejects a registered policy when the signing account keypath does not match the device key in the policy.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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",
+        "options": {
+          "force_script_config": {
+            "script_config": {
+              "type": "policy",
+              "policy": "wsh(multi(2,@0/**,@1/**))",
+              "keys": [
+                {
+                  "root_fingerprint": "4c00739d",
+                  "keypath": "m/48'/1'/0'/3'",
+                  "xpub": "xpub6EhivkawbkKDTyZXUfDUntyKvkx4fcniJY3RRMdcvvkKTEt7gX7CfotifBsm1iDYzLpRk9pspB6g2r2sjxVePkCScgDmkPiGUAWg2ESMKNA"
+                },
+                {
+                  "xpub": "tpubDFfyBnQAERJZWHv4W5rrhkpKJnPjycGzBpv8H1WgFjpkK7bVpuKw6JkeNvXqJix6csrQP3QgPZ19Yed2kbc7sniVHtNiQkX3cHsBxEqnz7Y"
+                }
+              ]
+            },
+            "keypath": "m/48'/1'/0'/4'"
+          }
+        }
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "outcome": "invalid_input",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "BTC Testnet\npolicy with\n2 keys",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Name",
+              "body": "test policy account",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Show policy\ndetails?",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Policy",
+              "body": "wsh(multi(2,@0/**,@1/**))",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 1/2",
+              "body": "This device: [4c00739d/48'/1'/0'/3']tpubDF5MSzQdK2GfjmkNvrCZzpJhFt3if1HmrAdimugmGqWDCXYpkjxHpFZYuDxYYDAnnFMLMjLkMGvij2XV8pLtHBejgGy5RvNW4875nFGBDWv",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 2/2",
+              "body": "tpubDFfyBnQAERJZWHv4W5rrhkpKJnPjycGzBpv8H1WgFjpkK7bVpuKw6JkeNvXqJix6csrQP3QgPZ19Yed2kbc7sniVHtNiQkX3cHsBxEqnz7Y",
+              "longtouch": false
+            }
+          ]
+        }
+      ],
+      "registrations": [
+        {
+          "script_config": {
+            "type": "policy",
+            "policy": "wsh(multi(2,@0/**,@1/**))",
+            "keys": [
+              {
+                "root_fingerprint": "4c00739d",
+                "keypath": "m/48'/1'/0'/3'",
+                "xpub": "xpub6EhivkawbkKDTyZXUfDUntyKvkx4fcniJY3RRMdcvvkKTEt7gX7CfotifBsm1iDYzLpRk9pspB6g2r2sjxVePkCScgDmkPiGUAWg2ESMKNA"
+              },
+              {
+                "xpub": "tpubDFfyBnQAERJZWHv4W5rrhkpKJnPjycGzBpv8H1WgFjpkK7bVpuKw6JkeNvXqJix6csrQP3QgPZ19Yed2kbc7sniVHtNiQkX3cHsBxEqnz7Y"
+              }
+            ]
+          },
+          "name": "test policy account"
+        }
+      ]
+    },
+    {
+      "id": "policy-change-index-too-high",
+      "description": "Rejects a registered policy change output at address index 10000.",
+      "coin": "tbtc",
+      "psbt": {
+        "transaction": "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",
+        "options": {
+          "force_script_config": {
+            "script_config": {
+              "type": "policy",
+              "policy": "wsh(multi(2,@0/**,@1/**))",
+              "keys": [
+                {
+                  "root_fingerprint": "4c00739d",
+                  "keypath": "m/48'/1'/0'/3'",
+                  "xpub": "xpub6EhivkawbkKDTyZXUfDUntyKvkx4fcniJY3RRMdcvvkKTEt7gX7CfotifBsm1iDYzLpRk9pspB6g2r2sjxVePkCScgDmkPiGUAWg2ESMKNA"
+                },
+                {
+                  "xpub": "tpubDFfyBnQAERJZWHv4W5rrhkpKJnPjycGzBpv8H1WgFjpkK7bVpuKw6JkeNvXqJix6csrQP3QgPZ19Yed2kbc7sniVHtNiQkX3cHsBxEqnz7Y"
+                }
+              ]
+            },
+            "keypath": "m/48'/1'/0'/3'"
+          }
+        }
+      },
+      "expected_needs_prevtxs": true,
+      "expectations": [
+        {
+          "outcome": "invalid_input",
+          "screens": [
+            {
+              "type": "confirm",
+              "title": "Spend from",
+              "body": "BTC Testnet\npolicy with\n2 keys",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Name",
+              "body": "test policy account",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Show policy\ndetails?",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Policy",
+              "body": "wsh(multi(2,@0/**,@1/**))",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 1/2",
+              "body": "This device: [4c00739d/48'/1'/0'/3']tpubDF5MSzQdK2GfjmkNvrCZzpJhFt3if1HmrAdimugmGqWDCXYpkjxHpFZYuDxYYDAnnFMLMjLkMGvij2XV8pLtHBejgGy5RvNW4875nFGBDWv",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Key 2/2",
+              "body": "tpubDFfyBnQAERJZWHv4W5rrhkpKJnPjycGzBpv8H1WgFjpkK7bVpuKw6JkeNvXqJix6csrQP3QgPZ19Yed2kbc7sniVHtNiQkX3cHsBxEqnz7Y",
+              "longtouch": false
+            }
+          ]
+        }
+      ],
+      "registrations": [
+        {
+          "script_config": {
+            "type": "policy",
+            "policy": "wsh(multi(2,@0/**,@1/**))",
+            "keys": [
+              {
+                "root_fingerprint": "4c00739d",
+                "keypath": "m/48'/1'/0'/3'",
+                "xpub": "xpub6EhivkawbkKDTyZXUfDUntyKvkx4fcniJY3RRMdcvvkKTEt7gX7CfotifBsm1iDYzLpRk9pspB6g2r2sjxVePkCScgDmkPiGUAWg2ESMKNA"
+              },
+              {
+                "xpub": "tpubDFfyBnQAERJZWHv4W5rrhkpKJnPjycGzBpv8H1WgFjpkK7bVpuKw6JkeNvXqJix6csrQP3QgPZ19Yed2kbc7sniVHtNiQkX3cHsBxEqnz7Y"
+              }
+            ]
+          },
+          "name": "test policy account"
+        }
+      ]
+    }
+  ]
+}
diff --git a/test/error-codes.test.ts b/test/error-codes.test.ts
index 1891fd2..b026d6f 100644
--- a/test/error-codes.test.ts
+++ b/test/error-codes.test.ts
@@ -27,6 +27,7 @@ import {
   CODE_NOT_IMPLEMENTED,
   CODE_PAIRING_REJECTED,
   CODE_PROTOBUF_DECODE,
+  CODE_PSBT_INVALID_ACCOUNT_KEYPATH,
   CODE_PSBT_INVALID_OP_RETURN,
   CODE_PSBT_KEY_NOT_FOUND,
   CODE_PSBT_KEY_NOT_UNIQUE,
@@ -146,6 +147,10 @@ const EXPECTED = {
     code: CODE_PSBT_INVALID_OP_RETURN,
     message: 'PSBT error: Invalid OP_RETURN script: <detail>',
   },
+  psbtInvalidAccountKeypath: {
+    code: CODE_PSBT_INVALID_ACCOUNT_KEYPATH,
+    message: 'PSBT error: Account script configs must contain a BIP44 account keypath.',
+  },
 } satisfies Record<string, ExpectedError>;
 
 function publicShape(err: { code: string; message: string }): ExpectedError {
@@ -192,6 +197,7 @@ describe('error code fixture', () => {
       EXPECTED.psbtKeyNotFound,
       EXPECTED.psbtUnknownOutputType,
       EXPECTED.psbtInvalidOpReturn,
+      EXPECTED.psbtInvalidAccountKeypath,
     ]).toEqual([
       { code: CODE_UNKNOWN, message: 'unknown error' },
       { code: CODE_NOISE, message: 'noise channel error' },
@@ -209,6 +215,10 @@ describe('error code fixture', () => {
       { code: CODE_PSBT_KEY_NOT_FOUND, message: 'PSBT error: Could not find our key in an input.' },
       { code: CODE_PSBT_UNKNOWN_OUTPUT_TYPE, message: 'PSBT error: Unrecognized/unsupported output type.' },
       { code: CODE_PSBT_INVALID_OP_RETURN, message: 'PSBT error: Invalid OP_RETURN script: <detail>' },
+      {
+        code: CODE_PSBT_INVALID_ACCOUNT_KEYPATH,
+        message: 'PSBT error: Account script configs must contain a BIP44 account keypath.',
+      },
     ]);
   });
 
@@ -282,6 +292,14 @@ describe('toPublicError', () => {
       CODE_ANTIKLEPTO,
       CODE_ETH_TYPED_MESSAGE,
       CODE_CHAIN_ID_TOO_LARGE,
+      CODE_BTC_SIGN,
+      CODE_PSBT_PARSE,
+      CODE_PSBT_SIGN_ERROR,
+      CODE_PSBT_KEY_NOT_UNIQUE,
+      CODE_PSBT_KEY_NOT_FOUND,
+      CODE_PSBT_UNKNOWN_OUTPUT_TYPE,
+      CODE_PSBT_INVALID_OP_RETURN,
+      CODE_PSBT_INVALID_ACCOUNT_KEYPATH,
       CODE_UNSUPPORTED,
       CODE_NOT_IMPLEMENTED,
       CODE_INVALID_STATE,
diff --git a/test/lifecycle.test.ts b/test/lifecycle.test.ts
index 3d4ce50..5c3c961 100644
--- a/test/lifecycle.test.ts
+++ b/test/lifecycle.test.ts
@@ -302,7 +302,9 @@ describe('PairedBitBox lifecycle', () => {
 
     expect(paired.product()).toBe('bitbox02-multi');
     await expect(paired.changePassword()).rejects.toMatchObject({ code: 'not-implemented' });
-    await expect(paired.btcXpub('btc', [0], 'xpub', false)).rejects.toMatchObject({ code: 'unsupported' });
+    await expect(paired.btcXpub('btc', [0], 'xpub', false)).rejects.toMatchObject({
+      code: 'unexpected-response',
+    });
 
     paired.close();
     expect(close).toHaveBeenCalledTimes(1);
diff --git a/test/simulator-btc.test.ts b/test/simulator-btc.test.ts
new file mode 100644
index 0000000..70e9193
--- /dev/null
+++ b/test/simulator-btc.test.ts
@@ -0,0 +1,539 @@
+// SPDX-License-Identifier: Apache-2.0
+
+import { bytesToHex, concatBytes } from '@noble/hashes/utils';
+import {
+  crypto as bitcoinCrypto,
+  initEccLib,
+  networks,
+  payments,
+  Psbt,
+  script as bitcoinScript,
+  Transaction as BitcoinTransaction,
+} from 'bitcoinjs-lib';
+import * as ecc from 'tiny-secp256k1';
+import { readFileSync } from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { afterEach, beforeAll, beforeEach, describe, expect, it } from 'vitest';
+import {
+  PairedBitBox,
+  type BtcScriptConfig,
+  type BtcScriptConfigWithKeypath,
+  type Error as BitBoxError,
+} from '../src/index.js';
+import { connectSimulator } from '../src/internal/connect-simulator.js';
+import { atLeast, parseSemver } from '../src/internal/hww.js';
+import { NoiseConfigNoCache } from '../src/internal/noise-config.js';
+import { completePairing, performHandshake } from '../src/internal/pairing.js';
+import { restoreFromMnemonic } from '../src/internal/restore.js';
+import {
+  SimulatorServer,
+  ensureSimulator,
+  simulatorCases,
+  simulatorSupported,
+  type SimulatorScreen,
+} from './simulator-util.js';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+initEccLib(ecc);
+const vectorFile = JSON.parse(readFileSync(
+  path.join(__dirname, 'data/btc-transaction-test-vectors.json'),
+  'utf8',
+)) as TestVectorFile;
+
+const ENABLED = simulatorSupported() && process.env.SKIP_SIMULATOR !== '1';
+type Semver = ReturnType<typeof parseSemver>;
+
+type VectorScriptConfig =
+  | { type: 'simple'; script_type: 'p2wpkh' | 'p2wpkh_p2sh' | 'p2tr' }
+  | {
+    type: 'multisig';
+    threshold: number;
+    xpubs: string[];
+    our_xpub_index: number;
+    script_type: 'p2wsh' | 'p2wsh_p2sh';
+  }
+  | {
+    type: 'policy';
+    policy: string;
+    keys: {
+      root_fingerprint?: string;
+      keypath?: string;
+      xpub: string;
+    }[];
+  };
+
+type SignatureSlot = {
+  input_index: number;
+  kind: 'ecdsa' | 'taproot_key' | 'taproot_script';
+  pubkey?: string;
+  leaf_hash?: string;
+  sighash: 'all' | 'default';
+};
+
+type VectorScreen = SimulatorScreen & { longtouch?: boolean };
+
+interface VersionExpectation {
+  min_version?: string;
+  max_version_exclusive?: string;
+  outcome: 'success' | 'unsupported' | 'invalid_input';
+  unsupported_version?: string;
+  screens: VectorScreen[];
+}
+
+interface TestVector {
+  id: string;
+  description: string;
+  coin: 'btc' | 'tbtc' | 'ltc';
+  psbt: {
+    transaction: string;
+    options?: {
+      force_script_config?: {
+        script_config: VectorScriptConfig;
+        keypath: string;
+      };
+      outputs?: Record<string, unknown>;
+      payment_requests?: unknown[];
+      format_unit?: 'default' | 'sat';
+    };
+  };
+  expectations: VersionExpectation[];
+  registrations?: {
+    script_config: VectorScriptConfig;
+    keypath?: string;
+    name: string;
+  }[];
+  expected_signatures?: SignatureSlot[];
+}
+
+interface TestVectorFile {
+  vectors: TestVector[];
+}
+
+async function connectRestored(): Promise<PairedBitBox> {
+  const session = await connectSimulator(undefined, undefined, new NoiseConfigNoCache());
+  try {
+    const pairing = await performHandshake(session.hww, session.config);
+    const channel = await completePairing(pairing);
+    await restoreFromMnemonic(channel);
+    return new PairedBitBox({ channel, info: session.hww.info, close: session.close });
+  } catch (error) {
+    session.close();
+    throw error;
+  }
+}
+
+function bitcoinMessageHash(message: Uint8Array): Uint8Array {
+  // bitcoinjs-lib does not include the legacy signed-message hash helper.
+  if (message.length >= 0xfd) {
+    throw new Error('test message is too long for a one-byte CompactSize');
+  }
+  return bitcoinCrypto.hash256(concatBytes(
+    new TextEncoder().encode(networks.bitcoin.messagePrefix),
+    Uint8Array.of(message.length),
+    message,
+  ));
+}
+
+function scriptConfig(config: VectorScriptConfig): BtcScriptConfig {
+  switch (config.type) {
+    case 'simple':
+      return {
+        simpleType: {
+          p2wpkh: 'p2wpkh',
+          p2wpkh_p2sh: 'p2wpkhP2sh',
+          p2tr: 'p2tr',
+        }[config.script_type] as 'p2wpkh' | 'p2wpkhP2sh' | 'p2tr',
+      };
+    case 'multisig':
+      return {
+        multisig: {
+          threshold: config.threshold,
+          xpubs: config.xpubs,
+          ourXpubIndex: config.our_xpub_index,
+          scriptType: config.script_type === 'p2wsh' ? 'p2wsh' : 'p2wshP2sh',
+        },
+      };
+    case 'policy':
+      return {
+        policy: {
+          policy: config.policy,
+          keys: config.keys.map(key => ({
+            xpub: key.xpub,
+            ...(key.root_fingerprint === undefined
+              ? {}
+              : { rootFingerprint: key.root_fingerprint }),
+            ...(key.keypath === undefined ? {} : { keypath: key.keypath }),
+          })),
+        },
+      };
+  }
+}
+
+function scriptConfigWithKeypath(
+  config: NonNullable<TestVector['psbt']['options']>['force_script_config'],
+): BtcScriptConfigWithKeypath | undefined {
+  if (config === undefined) {
+    return undefined;
+  }
+  return { scriptConfig: scriptConfig(config.script_config), keypath: config.keypath };
+}
+
+function expectationFor(
+  expectations: VersionExpectation[],
+  version: Semver,
+): VersionExpectation {
+  const found = expectations.find((expectation) => {
+    const afterMinimum = expectation.min_version === undefined ||
+      atLeast(version, parseSemver(expectation.min_version));
+    const beforeMaximum = expectation.max_version_exclusive === undefined ||
+      !atLeast(version, parseSemver(expectation.max_version_exclusive));
+    return afterMinimum && beforeMaximum;
+  });
+  if (found === undefined) {
+    throw new Error('no vector expectation matches the firmware version');
+  }
+  return found;
+}
+
+function expectedScreens(screens: VectorScreen[]): SimulatorScreen[] {
+  return screens.map(({ longtouch: _longtouch, ...screen }) => screen);
+}
+
+function signatureSlots(psbt: Psbt): SignatureSlot[] {
+  const slots: SignatureSlot[] = [];
+  psbt.data.inputs.forEach((input, inputIndex) => {
+    for (const partialSig of input.partialSig ?? []) {
+      const decoded = bitcoinScript.signature.decode(partialSig.signature);
+      slots.push({
+        input_index: inputIndex,
+        kind: 'ecdsa',
+        pubkey: bytesToHex(partialSig.pubkey),
+        sighash: decoded.hashType === BitcoinTransaction.SIGHASH_ALL ? 'all' : 'default',
+      });
+    }
+    if (input.tapKeySig !== undefined) {
+      slots.push({
+        input_index: inputIndex,
+        kind: 'taproot_key',
+        ...(input.tapInternalKey === undefined
+          ? {}
+          : { pubkey: bytesToHex(input.tapInternalKey) }),
+        sighash: input.tapKeySig.length === 64 ? 'default' : 'all',
+      });
+    }
+    for (const tapScriptSig of input.tapScriptSig ?? []) {
+      slots.push({
+        input_index: inputIndex,
+        kind: 'taproot_script',
+        pubkey: bytesToHex(tapScriptSig.pubkey),
+        leaf_hash: bytesToHex(tapScriptSig.leafHash),
+        sighash: tapScriptSig.signature.length === 64 ? 'default' : 'all',
+      });
+    }
+  });
+  return slots.sort((left, right) => slotKey(left).localeCompare(slotKey(right)));
+}
+
+function slotKey(slot: SignatureSlot): string {
+  return [
+    slot.input_index,
+    slot.kind,
+    slot.pubkey ?? '',
+    slot.leaf_hash ?? '',
+    slot.sighash,
+  ].join(':');
+}
+
+function assertSignatureInsertions(
+  vector: TestVector,
+  before: SignatureSlot[],
+  after: SignatureSlot[],
+): void {
+  const beforeKeys = new Set(before.map(slotKey));
+  const afterKeys = new Set(after.map(slotKey));
+  for (const key of beforeKeys) {
+    expect(afterKeys.has(key), `${vector.id}: signing removed a signature slot`).toBe(true);
+  }
+  const inserted = after.filter(slot => !beforeKeys.has(slotKey(slot)));
+  const expected = [...(vector.expected_signatures ?? [])]
+    .sort((left, right) => slotKey(left).localeCompare(slotKey(right)));
+  expect(inserted, `${vector.id}: inserted signature slots differ`).toEqual(expected);
+}
+
+function verifyAndFinalize(vector: TestVector, signed: Psbt): void {
+  const fundingOutputs = signed.data.inputs.map((input, inputIndex) => {
+    if (input.witnessUtxo !== undefined) {
+      return input.witnessUtxo;
+    }
+    if (input.nonWitnessUtxo === undefined) {
+      throw new Error(`${vector.id}: input ${inputIndex} has no funding output`);
+    }
+    const output = BitcoinTransaction.fromBuffer(input.nonWitnessUtxo)
+      .outs[signed.txInputs[inputIndex]!.index];
+    if (output === undefined) {
+      throw new Error(`${vector.id}: funding output index is out of bounds`);
+    }
+    return output;
+  });
+  expect(signed.validateSignaturesOfAllInputs((pubkey, hash, signature) =>
+    pubkey.length === 32
+      ? ecc.verifySchnorr(hash, pubkey, signature)
+      : ecc.verify(hash, pubkey, signature),
+  ), `${vector.id}: transaction signature is invalid`).toBe(true);
+
+  const finalized = signed.clone();
+  signed.data.inputs.forEach((input, inputIndex) => {
+    if (input.witnessUtxo === undefined) {
+      finalized.updateInput(inputIndex, { witnessUtxo: fundingOutputs[inputIndex]! });
+    }
+  });
+  try {
+    finalized.finalizeAllInputs();
+  } catch (error) {
+    // bitcoinjs-lib has no miniscript satisfier. Signatures above are still checked
+    // cryptographically for policy vectors that it cannot finalize.
+    if (vector.psbt.options?.force_script_config?.script_config.type === 'policy') {
+      return;
+    }
+    throw error;
+  }
+  const transaction = finalized.extractTransaction(true);
+  expect(transaction.ins).toHaveLength(signed.txInputs.length);
+  expect(transaction.outs).toHaveLength(signed.txOutputs.length);
+  for (const input of transaction.ins) {
+    expect(input.script.length > 0 || input.witness.length > 0).toBe(true);
+  }
+}
+
+function shouldSkip(vector: TestVector): boolean {
+  const outputs = vector.psbt.options?.outputs ?? {};
+  const paymentRequests = vector.psbt.options?.payment_requests ?? [];
+  return Object.keys(outputs).length > 0 || paymentRequests.length > 0;
+}
+
+async function registerScriptConfigs(
+  bitbox: PairedBitBox,
+  vector: TestVector,
+): Promise<void> {
+  for (const registration of vector.registrations ?? []) {
+    const config = scriptConfig(registration.script_config);
+    const registered = await bitbox.btcIsScriptConfigRegistered(
+      vector.coin,
+      config,
+      registration.keypath,
+    );
+    if (!registered) {
+      await bitbox.btcRegisterScriptConfig(
+        vector.coin,
+        config,
+        registration.keypath,
+        'autoXpubTpub',
+        registration.name,
+      );
+    }
+  }
+}
+
+function assertUnsupported(
+  vector: TestVector,
+  version: Semver,
+  expectation: VersionExpectation,
+  error: BitBoxError,
+): void {
+  const minimum = expectation.unsupported_version;
+  expect(minimum, `${vector.id}: missing unsupported firmware version`).toBeDefined();
+  expect(atLeast(version, parseSemver(minimum!))).toBe(false);
+  expect(
+    ['version', 'bitbox-invalid-input', 'bitbox-disabled'],
+    `${vector.id}: unexpected unsupported error ${error.code}`,
+  ).toContain(error.code);
+}
+
+async function runVector(
+  bitbox: PairedBitBox,
+  server: SimulatorServer,
+  vector: TestVector,
+): Promise<void> {
+  const version = parseSemver(bitbox.version());
+  const expectation = expectationFor(vector.expectations, version);
+  const original = Psbt.fromHex(vector.psbt.transaction);
+  const base64 = original.toBase64();
+  const before = signatureSlots(original);
+
+  const setupCheckpoint = server.stdout.checkpoint();
+  let setupError: BitBoxError | undefined;
+  try {
+    await registerScriptConfigs(bitbox, vector);
+  } catch (error) {
+    setupError = error as BitBoxError;
+  }
+  await server.stdout.waitUntilStable(setupCheckpoint);
+  if (setupError !== undefined) {
+    if (expectation.outcome === 'unsupported') {
+      assertUnsupported(vector, version, expectation, setupError);
+    } else if (expectation.outcome === 'invalid_input') {
+      expect(setupError.code).toBe('bitbox-invalid-input');
+    } else {
+      throw setupError;
+    }
+    expect(expectedScreens(expectation.screens)).toEqual([]);
+    expect(signatureSlots(original)).toEqual(before);
+    return;
+  }
+
+  const transactionCheckpoint = server.stdout.checkpoint();
+  let signedBase64: string | undefined;
+  let signError: BitBoxError | undefined;
+  try {
+    signedBase64 = await bitbox.btcSignPSBT(
+      vector.coin,
+      base64,
+      scriptConfigWithKeypath(vector.psbt.options?.force_script_config),
+      vector.psbt.options?.format_unit ?? 'default',
+    );
+  } catch (error) {
+    signError = error as BitBoxError;
+  }
+  const snapshot = expectation.outcome === 'success'
+    ? await server.stdout.waitForTerminalScreen(transactionCheckpoint)
+    : await server.stdout.waitUntilStable(transactionCheckpoint);
+  const actualScreens = snapshot.screens();
+  if (process.env.UPDATE_BTC_VECTOR_SCREENS === '1') {
+    process.stdout.write(
+      `screens for ${vector.id} on firmware ${bitbox.version()}: ${JSON.stringify(actualScreens)}\n`,
+    );
+  } else {
+    expect(actualScreens, `${vector.id}: simulator screens differ`).toEqual(
+      expectedScreens(expectation.screens),
+    );
+  }
+
+  switch (expectation.outcome) {
+    case 'success': {
+      if (signError !== undefined || signedBase64 === undefined) {
+        throw signError ?? new Error(`${vector.id}: signing returned no PSBT`);
+      }
+      const signed = Psbt.fromBase64(signedBase64);
+      assertSignatureInsertions(vector, before, signatureSlots(signed));
+      verifyAndFinalize(vector, signed);
+      break;
+    }
+    case 'unsupported':
+      expect(signError).toBeDefined();
+      assertUnsupported(vector, version, expectation, signError!);
+      expect(signatureSlots(original)).toEqual(before);
+      break;
+    case 'invalid_input':
+      expect(signError?.code).toBe('bitbox-invalid-input');
+      expect(signatureSlots(original)).toEqual(before);
+      break;
+  }
+}
+
+describe.skipIf(!ENABLED).sequential.each(simulatorCases())('simulator BTC $name', (simulator) => {
+  let server: SimulatorServer | undefined;
+  let binary = '';
+
+  beforeAll(async () => {
+    binary = await ensureSimulator(simulator);
+  }, 120_000);
+
+  beforeEach(() => {
+    server = new SimulatorServer(binary);
+  });
+
+  afterEach(async () => {
+    await server?.stop();
+    server = undefined;
+  }, 30_000);
+
+  it('supports xpubs, addresses, and message signing', async () => {
+    const bitbox = await connectRestored();
+    try {
+      await expect(bitbox.btcXpub(
+        'tbtc',
+        "m/49'/1'/0'",
+        'ypub',
+        false,
+      )).resolves.toBe(
+        'ypub6WqXiL3fbDK5QNPe3hN4uSVkEvuE8wXoNCcecgggSuKVpU3Kc4fTvhuLgUhtnbAdaTb9gpz5PQdvzcsKPTLgW2CPkF5ZNRzQeKFT4NSc1xN',
+      );
+
+      await expect(bitbox.btcXpubs(
+        'tbtc',
+        ["m/49'/1'/0'", "m/84'/1'/0'", "m/86'/1'/0'"],
+        'tpub',
+      )).resolves.toEqual([
+        'tpubDCNtvuCS9oj3psPNfXZXuGjcQ5rSBi3MzigjBqqwQohWWetoRdLzT5v2uJq6KBTwxj1FYvuPTr7RoWkN4cmubDy5wW8SU3q9xYnDRpQepiT',
+        'tpubDCYNsKenq7Cuuf4fHsu2fsWA7Wb5cTD2qRUrw6uHbNNYQoNkEoJk4hgNhxbnGss5gnEe2MpqN2qbRVqWJGmuofAWmwFFi4CZ9Tg1LHKJDhF',
+        'tpubDDc6eecoyYxL4g3WKYpbbinyUmnfVikQCzHTPd6rJQivaPqGKBFiueQqWoAYonB8hAEXGM1ak7LqrnwczH24EbW7jbG5bNK5rncmRXtv7nG',
+      ]);
+
+      await expect(bitbox.btcAddress(
+        'tbtc',
+        "m/84'/1'/0'/1/10",
+        { simpleType: 'p2wpkh' },
+        false,
+      )).resolves.toBe('tb1qq064dxjgl9h9wzgsmzy6t6306qew42w9ka02u3');
+
+      const messageKeypath = "m/49'/0'/0'/0/10";
+      const messageAddress = await bitbox.btcAddress(
+        'btc',
+        messageKeypath,
+        { simpleType: 'p2wpkhP2sh' },
+        false,
+      );
+      const message = new TextEncoder().encode('message');
+      const signature = await bitbox.btcSignMessage(
+        'btc',
+        {
+          scriptConfig: { simpleType: 'p2wpkhP2sh' },
+          keypath: messageKeypath,
+        },
+        message,
+      );
+      const messageHash = bitcoinMessageHash(message);
+      const compactSignature = Uint8Array.from(signature.sig);
+      const publicKey = ecc.recover(
+        messageHash,
+        compactSignature,
+        signature.recid as ecc.RecoveryIdType,
+        true,
+      );
+      if (publicKey === null) {
+        throw new Error('failed to recover Bitcoin message signing key');
+      }
+      expect(ecc.verify(
+        messageHash,
+        publicKey,
+        compactSignature,
+      )).toBe(true);
+      expect(payments.p2sh({
+        redeem: payments.p2wpkh({ pubkey: publicKey }),
+      }).address).toBe(messageAddress);
+      expect(signature.electrumSig65).toEqual([
+        31 + signature.recid,
+        ...signature.sig,
+      ]);
+    } finally {
+      bitbox.close();
+    }
+  }, 60_000);
+
+  it('signs the firmware BTC transaction vectors', async () => {
+    expect(vectorFile.vectors).toHaveLength(41);
+    expect(vectorFile.vectors.filter(vector => !shouldSkip(vector))).toHaveLength(33);
+    const bitbox = await connectRestored();
+    try {
+      await server!.stdout.waitUntilStable(server!.stdout.checkpoint());
+      for (const vector of vectorFile.vectors) {
+        if (!shouldSkip(vector)) {
+          await runVector(bitbox, server!, vector);
+        }
+      }
+    } finally {
+      bitbox.close();
+    }
+  }, 15 * 60_000);
+});
diff --git a/test/simulator-util.ts b/test/simulator-util.ts
index 3ba0959..d94f791 100644
--- a/test/simulator-util.ts
+++ b/test/simulator-util.ts
@@ -20,6 +20,237 @@ export interface SimulatorCase {
   binaryPath: string;
 }
 
+export type SimulatorScreen =
+  | { type: 'confirm'; title: string; body: string }
+  | { type: 'transaction_address'; amount: string; address: string }
+  | { type: 'transaction_fee'; amount: string; fee: string }
+  | { type: 'status'; title: string; body: string }
+  | { type: 'swap'; title: string; from: string; to: string };
+
+function screenEndMarker(start: string): string | undefined {
+  switch (start) {
+    case 'CONFIRM SCREEN START':
+      return 'CONFIRM SCREEN END';
+    case 'CONFIRM TRANSACTION ADDRESS SCREEN START':
+      return 'CONFIRM TRANSACTION ADDRESS SCREEN END';
+    case 'CONFIRM TRANSACTION FEE SCREEN START':
+      return 'CONFIRM TRANSACTION FEE SCREEN END';
+    case 'STATUS SCREEN START':
+      return 'STATUS SCREEN END';
+    case 'CONFIRM SWAP SCREEN START':
+      return 'CONFIRM SWAP SCREEN END';
+    default:
+      return undefined;
+  }
+}
+
+function isScreenMarker(line: string): boolean {
+  return line.endsWith(' SCREEN START') || line.endsWith(' SCREEN END');
+}
+
+function parseScreenFields(
+  lines: string[],
+  blockLine: number,
+  fields: string[],
+): string[] {
+  const result: string[] = [];
+  let lineIndex = 0;
+  for (let fieldIndex = 0; fieldIndex < fields.length; fieldIndex += 1) {
+    const field = fields[fieldIndex]!;
+    const line = lines[lineIndex];
+    if (line === undefined) {
+      throw new Error(`simulator stdout line ${blockLine}: missing ${field} field`);
+    }
+    const prefix = `${field}: `;
+    if (!line.startsWith(prefix)) {
+      throw new Error(
+        `simulator stdout line ${blockLine}: expected ${JSON.stringify(prefix)}, got ${JSON.stringify(line)}`,
+      );
+    }
+    const valueLines = [line.slice(prefix.length)];
+    lineIndex += 1;
+    const nextField = fields[fieldIndex + 1];
+    if (nextField === undefined) {
+      valueLines.push(...lines.slice(lineIndex));
+      lineIndex = lines.length;
+    } else {
+      const nextPrefix = `${nextField}: `;
+      while (lineIndex < lines.length && !lines[lineIndex]!.startsWith(nextPrefix)) {
+        valueLines.push(lines[lineIndex]!);
+        lineIndex += 1;
+      }
+    }
+    result.push(valueLines.join('\n'));
+  }
+  return result;
+}
+
+function parseScreenBlock(
+  start: string,
+  lines: string[],
+  blockLine: number,
+): SimulatorScreen {
+  switch (start) {
+    case 'CONFIRM SCREEN START': {
+      const [title, body] = parseScreenFields(lines, blockLine, ['TITLE', 'BODY']);
+      return { type: 'confirm', title: title!, body: body! };
+    }
+    case 'CONFIRM TRANSACTION ADDRESS SCREEN START': {
+      const [amount, address] = parseScreenFields(lines, blockLine, ['AMOUNT', 'ADDRESS']);
+      return { type: 'transaction_address', amount: amount!, address: address! };
+    }
+    case 'CONFIRM TRANSACTION FEE SCREEN START': {
+      const [amount, fee] = parseScreenFields(lines, blockLine, ['AMOUNT', 'FEE']);
+      return { type: 'transaction_fee', amount: amount!, fee: fee! };
+    }
+    case 'STATUS SCREEN START': {
+      const titleLine = lines[0];
+      if (titleLine === undefined || !titleLine.startsWith('TITLE: ')) {
+        throw new Error(`simulator stdout line ${blockLine}: missing TITLE field`);
+      }
+      return {
+        type: 'status',
+        title: titleLine.slice('TITLE: '.length),
+        body: lines.slice(1).join('\n'),
+      };
+    }
+    case 'CONFIRM SWAP SCREEN START': {
+      const [title, from, to] = parseScreenFields(
+        lines,
+        blockLine,
+        ['TITLE', 'FROM', 'TO'],
+      );
+      return { type: 'swap', title: title!, from: from!, to: to! };
+    }
+    default:
+      throw new Error(`simulator stdout line ${blockLine}: unknown screen marker ${start}`);
+  }
+}
+
+export function parseSimulatorScreens(output: string): SimulatorScreen[] {
+  const lines = output.split(/\r?\n/);
+  if (lines.at(-1) === '') {
+    lines.pop();
+  }
+  const result: SimulatorScreen[] = [];
+  let index = 0;
+  while (index < lines.length) {
+    const start = lines[index]!;
+    const endMarker = screenEndMarker(start);
+    if (endMarker === undefined) {
+      if (isScreenMarker(start)) {
+        throw new Error(
+          `simulator stdout line ${index + 1}: unknown screen marker ${JSON.stringify(start)}`,
+        );
+      }
+      index += 1;
+      continue;
+    }
+    let end = index + 1;
+    while (end < lines.length && lines[end] !== endMarker) {
+      if (screenEndMarker(lines[end]!) !== undefined) {
+        throw new Error(
+          `simulator stdout line ${end + 1}: screen starting on line ${index + 1} contains a nested screen`,
+        );
+      }
+      if (isScreenMarker(lines[end]!)) {
+        throw new Error(
+          `simulator stdout line ${end + 1}: unexpected marker ${JSON.stringify(lines[end])}`,
+        );
+      }
+      end += 1;
+    }
+    if (end === lines.length) {
+      throw new Error(`simulator stdout line ${index + 1}: missing ${endMarker}`);
+    }
+    result.push(parseScreenBlock(start, lines.slice(index + 1, end), index + 1));
+    index = end + 1;
+  }
+  return result;
+}
+
+export class SimulatorStdoutSnapshot {
+  constructor(private readonly lines: string[]) {}
+
+  raw(): string {
+    return this.lines.length === 0 ? '' : `${this.lines.join('\n')}\n`;
+  }
+
+  screens(): SimulatorScreen[] {
+    return parseSimulatorScreens(this.raw());
+  }
+}
+
+export class SimulatorStdout {
+  private readonly lines: string[] = [];
+  private lastUpdate = Date.now();
+  private closed = false;
+
+  recordLine(line: string): void {
+    this.lines.push(line);
+    this.lastUpdate = Date.now();
+  }
+
+  markClosed(): void {
+    this.closed = true;
+  }
+
+  checkpoint(): number {
+    return this.lines.length;
+  }
+
+  snapshot(checkpoint: number): SimulatorStdoutSnapshot {
+    if (checkpoint > this.lines.length) {
+      throw new Error('simulator stdout checkpoint is out of bounds');
+    }
+    return new SimulatorStdoutSnapshot(this.lines.slice(checkpoint));
+  }
+
+  async waitUntilStable(
+    checkpoint: number,
+    stableForMs = 50,
+    timeoutMs = 5_000,
+  ): Promise<SimulatorStdoutSnapshot> {
+    const started = Date.now();
+    for (;;) {
+      const now = Date.now();
+      const lastUpdate = this.lines.length > checkpoint ? this.lastUpdate : started;
+      if (now - lastUpdate >= stableForMs || this.closed) {
+        return this.snapshot(checkpoint);
+      }
+      if (now - started >= timeoutMs) {
+        const snapshot = this.snapshot(checkpoint);
+        throw new Error(`waiting for stable simulator stdout timed out\n${snapshot.raw()}`);
+      }
+      await new Promise(resolve => setTimeout(resolve, 10));
+    }
+  }
+
+  async waitForTerminalScreen(
+    checkpoint: number,
+    timeoutMs = 5_000,
+  ): Promise<SimulatorStdoutSnapshot> {
+    const started = Date.now();
+    for (;;) {
+      const snapshot = this.snapshot(checkpoint);
+      try {
+        if (snapshot.screens().at(-1)?.type === 'status') {
+          return snapshot;
+        }
+      } catch {
+        // A screen block may still be arriving; parse again after the next poll.
+      }
+      if (this.closed) {
+        throw new Error(`simulator stdout closed before terminal screen\n${snapshot.raw()}`);
+      }
+      if (Date.now() - started >= timeoutMs) {
+        throw new Error(`waiting for terminal simulator screen timed out\n${snapshot.raw()}`);
+      }
+      await new Promise(resolve => setTimeout(resolve, 10));
+    }
+  }
+}
+
 function simulatorsJsonPath(): string {
   return path.join(__dirname, 'simulators.json');
 }
@@ -159,6 +390,7 @@ export async function ensureSimulator(simulator: SimulatorCase): Promise<string>
  */
 export class SimulatorServer {
   private readonly child: ChildProcess;
+  readonly stdout = new SimulatorStdout();
   readonly exited: Promise<void>;
 
   constructor(binaryPath: string) {
@@ -168,8 +400,17 @@ export class SimulatorServer {
     this.child = spawn('stdbuf', ['-oL', binaryPath], { stdio: ['ignore', 'pipe', 'pipe'] });
     this.child.stdout?.setEncoding('utf8');
     this.child.stderr?.setEncoding('utf8');
-    this.child.stdout?.on('data', (chunk: string) => forward(chunk, process.stdout, '[sim]'));
-    this.child.stderr?.on('data', (chunk: string) => forward(chunk, process.stderr, '[sim!]'));
+    const stdoutLines = new LineForwarder(process.stdout, '[sim]', (line) => {
+      this.stdout.recordLine(line);
+    });
+    const stderrLines = new LineForwarder(process.stderr, '[sim!]');
+    this.child.stdout?.on('data', (chunk: string) => stdoutLines.write(chunk));
+    this.child.stderr?.on('data', (chunk: string) => stderrLines.write(chunk));
+    this.child.stdout?.on('end', () => {
+      stdoutLines.end();
+      this.stdout.markClosed();
+    });
+    this.child.stderr?.on('end', () => stderrLines.end());
     this.exited = new Promise((resolve) => {
       this.child.once('exit', () => resolve());
     });
@@ -201,10 +442,34 @@ export class SimulatorServer {
   }
 }
 
-function forward(chunk: string, out: NodeJS.WritableStream, prefix: string): void {
-  for (const line of chunk.split(/\r?\n/)) {
-    if (line.length > 0) {
-      out.write(`\t\t${prefix} ${line}\n`);
+class LineForwarder {
+  private remainder = '';
+
+  constructor(
+    private readonly out: NodeJS.WritableStream,
+    private readonly prefix: string,
+    private readonly onLine?: (line: string) => void,
+  ) {}
+
+  write(chunk: string): void {
+    const lines = `${this.remainder}${chunk}`.split(/\r?\n/);
+    this.remainder = lines.pop() ?? '';
+    for (const line of lines) {
+      this.forward(line);
+    }
+  }
+
+  end(): void {
+    if (this.remainder.length > 0) {
+      this.forward(this.remainder);
+      this.remainder = '';
+    }
+  }
+
+  private forward(line: string): void {
+    this.onLine?.(line);
+    if (line.length > 0 && process.env.UPDATE_BTC_VECTOR_SCREENS !== '1') {
+      this.out.write(`\t\t${this.prefix} ${line}\n`);
     }
   }
 }