快速开始

const userAddress = account.address;

const response = await fetch('https://order.li.fi/api/v1/integrator/quote/request', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    user: { chain: 'eip155:8453', address: userAddress },
    intent: {
      intentType: 'oif-swap',
      inputs: [{
        chain: 'eip155:8453',
        user: userAddress,
        asset: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913',  // USDC on Base
        amount: '10000000',  // 10 USDC (6 decimals)
      }],
      outputs: [{
        chain: 'eip155:42161',
        receiver: userAddress,
        asset: '0xaf88d065e77c8cC2239327C5EDb3A432268e5831',  // USDC on Arbitrum
        amount: null,
      }],
      swapType: 'exact-input',
    },
    supportedTypes: ['oif-user-open-v0'],
  }),
});

const { quotes } = await response.json();
const bestQuote = quotes[0];
console.log('Output amount:', bestQuote.preview.outputs[0].amount);

import { erc20Abi } from 'viem';

for (const check of bestQuote.order.checks.allowances) {
  const currentAllowance = await publicClient.readContract({
    address: check.token,
    abi: erc20Abi,
    functionName: 'allowance',
    args: [userAddress, check.spender],
  });

  if (currentAllowance < BigInt(check.required)) {
    const approveHash = await walletClient.writeContract({
      address: check.token,
      abi: erc20Abi,
      functionName: 'approve',
      args: [check.spender, BigInt(check.required)],
    });
    await publicClient.waitForTransactionReceipt({ hash: approveHash });
    console.log('Approval confirmed');
  }
}

const { openIntentTx } = bestQuote.order;

const openHash = await walletClient.sendTransaction({
  to: openIntentTx.to,
  data: openIntentTx.data,
});
const receipt = await publicClient.waitForTransactionReceipt({ hash: openHash });
console.log('Order opened! Tx:', receipt.transactionHash);

// keccak256 of the settler's event signature:
// Open(bytes32 indexed orderId, StandardOrder order)
const OPEN_EVENT_TOPIC =
  '0x9ff74bd56d00785b881ef9fa3f03d7b598686a39a9bcff89a6008db588b18a7b';

const openLog = receipt.logs.find((log) => log.topics[0] === OPEN_EVENT_TOPIC);
const orderId = openLog?.topics[1];
if (!orderId) throw new Error('Open event not found in receipt logs');
console.log('Order ID:', orderId);

const trackOrder = async (onChainOrderId: string) => {
  let status: string;
  do {
    const res = await fetch(
      `https://order.li.fi/orders/status?onChainOrderId=${onChainOrderId}`
    );
    const data = await res.json();
    status = data.meta.orderStatus;
    console.log(`Status: ${status}`);

    if (status !== 'Settled' && status !== 'Refunded') {
      await new Promise(r => setTimeout(r, 3000));
    }
  } while (status !== 'Settled' && status !== 'Refunded');

  return status;
};

await trackOrder(orderId);