Complete the Swap

When the Swap is ready, it is time to claim the funds

The final step is to have the user claim the funds on the destination chain. After the user calls withdraw with the secret, the secret is exposed to the public and now our team can use that secret to withdraw the original funds and complete the atomic swap.

Example

const SWAP_CONTRACT_ADDRESS_ON_DESTINATION = "0x..."; // get this from the docs for your network
const ABI = '{
    "constant": false,
    "inputs": [
      {
        "internalType": "bytes32",
        "name": "_contractId",
        "type": "bytes32"
      },
      {
        "internalType": "bytes32",
        "name": "_preimage",
        "type": "bytes32"
      }
    ],
    "name": "withdraw",
    "outputs": [
      {
        "internalType": "bool",
        "name": "",
        "type": "bool"
      }
    ],
    "payable": false,
    "stateMutability": "nonpayable",
    "type": "function"
  }';

const provider = new ethers.providers.Web3Provider(window.ethereum);
const signer = provider.getSigner();

const safeSwap = new ethers.Contract(SWAP_CONTRACT_ADDRESS, ABI, signer);

const response = await safeSwap.withdraw(swapInfo.targetContractId, secret, { gasLimit: 200000 });
return response.hash;