During November 2024, this developer delivered Mantle gas fee estimation support for the wormhole-foundation/native-token-transfers repository. They extended the existing gas limit calculation logic to incorporate a Mantle-specific value, aligning it with the approach used for Arbitrum Sepolia. This update enables accurate fee estimation for transactions on the Mantle network, reducing the risk of overpayment or failed transactions and supporting smoother multi-network deployments. The work focused on robust cross-network fee estimation rather than bug fixes. The implementation leveraged TypeScript, Node.js, and blockchain development skills, demonstrating a methodical approach to enhancing EVM-based transaction reliability and network compatibility.