Conditional Escrow with Chainlink CRE

We built a trust-minimized WETH escrow on Ethereum that pays workers only after verified task completion. Our system combines onchain proof of work, an external verification API, cryptographic signatures, and a Chainlink CRE workflow that listens to blockchain events, validates results, and performs secure onchain writes. This demonstrates real automation of blockchain-to-API workflows, enabling safer freelance payments, DAO grants, and milestone contracts without centralized intermediaries.

Built with Solidity escrow contracts, Hardhat scripts, an external verification API, and a Chainlink CRE workflow that listens to blockchain events, validates signatures and onchain state, performs secure writes, and triggers automated WETH payouts on Ethereum mainnet.