Developed Swell calldata support for the LedgerHQ/clear-signing-erc7730-registry, enabling seamless integration with the Swell network and preparing the registry for cross-network deployments. Focused on implementing and wiring calldata handling to ensure accurate parsing and processing of Swell-originated data, the work addressed the need for correct interpretation of network-specific calldata within smart contracts. Leveraged expertise in Solidity and blockchain smart contract development to update the repository in line with Swell network requirements. The approach emphasized code quality and maintainability, with targeted commits and a clear change history reflecting careful attention to integration details and future extensibility of the registry.