A professionally organized collection of smart contracts implementing various DeFi, Governance, and Supply Chain protocols. This repository serves as a showcase of clean code, security best practices, and gas-optimized Solidity development.
The repository has been structured to follow industry standards for scalable blockchain applications:
SmartContractsHub/
├── contracts/ # Core Solidity smart contracts
│ ├── Auction.sol # Secure Pull-Payment Auction protocol
│ ├── Voting.sol # Advanced Governance with Quorum & Voting Rights
│ ├── Lending.sol # DeFi Lending & Borrowing implementation
│ └── ... # 20+ specialized contracts (Supply Chain, Identity, etc.)
├── test/ # Ethers.js and Hardhat test suites
├── docs/ # Research notes, technical specifications, and Daml analysis
├── scripts/ # Deployment and automation scripts
└── hardhat.config.js # Hardhat development environment setup- Security First: Key contracts like
Auction.solimplement the Withdrawal Pattern (Pull over Push) to prevent Denial of Service (DoS) attacks and ensure secure fund transfers. - Modern Standards: All core contracts have been modernized to Solidity 0.8.20, utilizing custom errors for gas reduction and
block.timestampfor timing. - Access Control: Integrated OpenZeppelin's
Ownableandaccess controlpatterns to manage administrative privileges securely. - Gas Efficiency: Optimized state updates and used
immutable/constantvariables to minimize on-chain execution costs. - Broad Protocol Support: Implements complex logic for Real Estate, Insurance, Digital Identity, and IoT Supply Chain on-chain.
- Clone the repository:
git clone https://github.com/Dpk376/SmartContractsHub.git cd SmartContractsHub - Install dependencies (Hardhat & OpenZeppelin):
npm install --save-dev hardhat @nomicfoundation/hardhat-toolbox @openzeppelin/contracts
- Compile Contracts:
npx hardhat compile
- Run Tests:
npx hardhat test
Developed with a focus on Security, Optimization, and Transparency by Dpk376