Fixes EIP-150 1/64 estimation math

Author: acenolaza

packages/airnode-node/src/evm/fulfillments/api-calls.test.ts

@@ -656,8 +656,8 @@ describe('submitApiCall', () => {
             {
               level: 'INFO',
               message: `Gas limit is set to ${
-                73804 + 290001 + 5684
-              } (AirnodeRrp: ${73804} + Fulfillment Call: ${290001} + EIP150: ${5684}) for Request:${apiCall.id}.`,
+                73804 + 290001 + 5774
+              } (AirnodeRrp: ${73804} + Fulfillment Call: ${290001} + EIP150: ${5774}) for Request:${apiCall.id}.`,
             },
             { level: 'INFO', message: `Submitting API call fulfillment for Request:${apiCall.id}...` },
           ]);
@@ -686,7 +686,7 @@ describe('submitApiCall', () => {
             apiCall.fulfillFunctionId,
             '0x448b8ad3a330cf8f269f487881b59efff721b3dfa8e61f7c8fd2480389459ed3',
             '0xda6d5aa27f48aa951ba401c8a779645f7d1fa4a46a5e99eb7da04b4e059449a834ca1058c85dfe8117305265228f8cf7ae64c3ef3c4d1cc191f77807227dac461b',
-            { ...txOpts, gasLimit: ethers.BigNumber.from(73804 + 290001 + 5684) }
+            { ...txOpts, gasLimit: ethers.BigNumber.from(73804 + 290001 + 5774) }
           );
           expect(failMock).not.toHaveBeenCalled();
         }
@@ -735,8 +735,8 @@ describe('submitApiCall', () => {
             {
               level: 'INFO',
               message: `Gas limit is set to ${
-                73804 + 290001 + 5684
-              } (AirnodeRrp: ${73804} + Fulfillment Call: ${290001} + EIP150: ${5684}) for Request:${apiCall.id}.`,
+                73804 + 290001 + 5774
+              } (AirnodeRrp: ${73804} + Fulfillment Call: ${290001} + EIP150: ${5774}) for Request:${apiCall.id}.`,
             },
             { level: 'INFO', message: `Submitting API call fulfillment for Request:${apiCall.id}...` },
             {
@@ -768,7 +768,7 @@ describe('submitApiCall', () => {
             apiCall.fulfillFunctionId,
             '0x448b8ad3a330cf8f269f487881b59efff721b3dfa8e61f7c8fd2480389459ed3',
             '0xda6d5aa27f48aa951ba401c8a779645f7d1fa4a46a5e99eb7da04b4e059449a834ca1058c85dfe8117305265228f8cf7ae64c3ef3c4d1cc191f77807227dac461b',
-            { ...txOpts, gasLimit: ethers.BigNumber.from(73804 + 290001 + 5684) }
+            { ...txOpts, gasLimit: ethers.BigNumber.from(73804 + 290001 + 5774) }
           );
           expect(failMock).not.toHaveBeenCalled();
         }

packages/airnode-node/src/evm/fulfillments/api-calls.ts

@@ -319,7 +319,7 @@ export async function estimateGasAndSubmitFulfill(
   const subTotalCost = airnodeRrpGasCost.add(fulfillmentCallGasCost);
   // https://github.com/ethereum/EIPs/issues/114
   // https://github.com/ethereum/EIPs/blob/master/EIPS/eip-150.md
-  const eip150GasReserve = subTotalCost.div(64);
+  const eip150GasReserve = subTotalCost.div(63);
   const totalGasCost = subTotalCost.add(eip150GasReserve);
 
   // If gas estimation is success, submit fulfillment without making static test call