Cross-Chain Swap Refund Claim Tool (Failed Swap)

WHAT IT DOES

This tool enables DeFi users to claim refunds for failed cross-chain swaps. When a cross-chain swap fails to execute due to price changes, insufficient liquidity, or technical issues, the user's funds are typically locked or held in escrow. This tool allows eligible users to retrieve their refunded tokens by submitting a claim transaction. It connects to your wallet and reads the swap contract address, failed swap ID, refund amount, refund eligibility, claim status, swap parameters, refund history, and timestamps. The tool signs and submits transactions to claim refunds for failed swaps, transfer refunded tokens, update claim status, record claim metadata, and emit refund events.

HOW TO USE

1. Connect your wallet using the wallet bridge (supports MetaMask, WalletConnect, and other EVM-compatible wallets).

2. Select the target network that matches your swap contract deployment.

3. Enter the swap contract address and the failed swap ID, then click "load contract" to initialize the connection.

4. Click "fetch refund status" to retrieve the refund amount, eligibility status, claim status, and swap parameters.

5. Review the refund details including the refund amount, eligibility (eligible or not), and current claim status (pending, claimed, expired, or invalid).

6. Click "validate refund" to verify that the refund is eligible and claimable.

7. Click "check refund history" to see who has claimed this refund in the past (if anyone).

8. Review the refund amount, claim status, and swap parameters before executing.

9. Click "claim refund" to sign and submit the transaction that transfers the refunded tokens to your wallet.

10. After execution, the claim status will update to "claimed" and the refund history will show your claim.

TECHNICAL MECHANISM

The tool uses ethers.js v5.7.2 to interact with any EVM-compatible swap contract that implements a standard refund interface (getRefund(uint256) view returns (uint256 amount, bool eligible, uint8 status), getSwapParams(uint256) view, claimRefund(uint256) external, getRefundHistory(uint256) view). The getRefund function returns the refund amount (in wei), a boolean indicating eligibility, and a status code (0=pending, 1=claimed, 2=expired, 3=invalid). The claimRefund function validates that the caller is eligible, the swap has failed, and the refund hasn't been claimed before, then transfers the refund amount to the caller. The contract maintains a history of refund claims, recording timestamps and claimer addresses for audit purposes. Transaction handling follows EIP-1559 gas price calculations using receipt.effectiveGasPrice for accurate cost reporting. Refund metadata is recorded both in the contract's history and locally for the user's reference.

WHAT IT CANNOT SEE

This tool operates purely on-chain and cannot verify swap failure cause — it does not analyze why the swap failed or whether the failure was legitimate. It cannot ensure refund eligibility — the tool relies solely on the contract's eligibility logic and cannot override or verify it. It cannot detect fraudulent claims — the tool cannot identify users who might be attempting to claim refunds fraudulently or for swaps that didn't actually fail. It cannot validate swap execution — the tool cannot verify that the swap was attempted, what happened during execution, or whether the failure was due to user error. The tool also cannot guarantee refund processing time — refund claims are processed based on contract logic and network conditions.

PLEASE NOTE

This tool works exclusively with EVM-compatible blockchain networks (Ethereum, Polygon, Arbitrum, Optimism, Base, etc.). It requires the swap contract to implement the refund interface described above. All transactions incur gas fees paid by the connected wallet. The tool maintains no persistent storage — all state is refreshed from the blockchain on each session. Refund claims are typically time-sensitive — ensure you claim your refund before the claim window expires. If the claim status shows as "claimed" but you haven't received your funds, check your wallet balance and transaction history to confirm the transfer. Always test on a testnet first and verify that the refund amount and eligibility are correct before claiming.