Over a two-month period, contributed to the foundry-rs/foundry and alloy-rs/evm repositories by building targeted features in Rust for blockchain and smart contract development. Developed a new encoding method for contract deployment arguments in Foundry, streamlining the deployment workflow by omitting the function selector prefix and adding comprehensive test coverage to ensure reliability. Later, implemented dynamic transaction handling in alloy-rs/evm by introducing the TransactionTr trait and extending EvmInternals with TxEnv, enabling flexible interaction across Ethereum transaction types. Demonstrated a test-driven, PR-based workflow with a focus on maintainability, extensibility, and improved developer experience in Rust-based blockchain tooling.