feat: add USDC swap + reimbursable gas station examples #1108
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…luding session signature handling and updated contract interactions. Add example scripts for USDC transfers and swaps using the Universal Router. Update package dependencies for Uniswap SDKs and OpenZeppelin contracts.
…ermit2 and Uniswap Universal Router. Enhance documentation with detailed usage instructions and environment variable requirements. Streamline code for clarity and maintainability.
…eimbursable gas station support
…ing new contract addresses and EIP-712 field name updates. Refactor code for improved readability and maintainability across various files, and enhance documentation to reflect these changes.
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Bijan-Massoumi
changed the title
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This pull request is automatically built and testable in CodeSandbox. To see build info of the built libraries, click here or the icon next to each commit SHA. Latest deployment of this branch, based on commit a600f14:
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ngmihodl
approved these changes
Nov 26, 2025
ngmihodl
approved these changes
Nov 26, 2025
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Summary & Motivation
Adds two new Gas Station examples and introduces reimbursable execution support:
swapUSDCForETH.ts: USDC→WETH swap via Uniswap usingapproveThenExecuteto combine ERC20 + Permit2 approvals into 1 tx (2 total instead of 3)transferUSDCReimbursable.ts: EOA pays gas in USDC instead of paymaster covering costsreimbursableContractconfig,executeWithReimbursement(), andsignSessionForUSDCTransfer()to@turnkey/gas-stationHow I Tested These Changes
Ran both examples on Base mainnet. Swap executed 2 transactions successfully. Reimbursable transfer deducted USDC for gas and refunded excess.
Did you add a changeset?
yes