During February 2026, this developer contributed to the worldcoin/bedrock repository by implementing on-chain ERC-20 allowance approvals using Permit2’s IAllowanceTransfer.approve method. The work enabled explicit spend approvals and token transfers by designated spenders, streamlining wallet-based token workflows and enhancing DeFi interoperability. Leveraging Rust for blockchain and smart contract development, the implementation aligned Bedrock with Permit2 standards, reducing friction for users managing ERC-20 tokens. The feature focused on secure, standards-compliant token transfers, allowing owners to delegate transfer rights efficiently. Over the month, the developer delivered this core feature, demonstrating depth in blockchain protocol integration and smart contract engineering using Rust.