Swap Native token → Shorttail

E.g: 0.01 ETH → USDC on Ethereum mainnet (Chain 1), specifying selling amount.

19KB

exchangeAbi.json

ABI used in the example

const fetch = require('node-fetch');
import ethers from "ethers";
import exchangeAbi from "./exchangeAbi.json";

// Get a quote
async function getQuote() {
  const quotePayload = {
    "output_asset_symbol": "USDC",
    "input_asset_symbol": "ETH",
    "chain_id": 1,
    "time_in_seconds": 60,
    "input_amount": "10000000000000000"
  };

  const requestOptions = {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json'
    },
    body: JSON.stringify(quotePayload)
  };

  const response = await fetch('https://api.clipper.exchange/rfq/quote', requestOptions);
  const quote = await response.json();
  
  return quote;
}

// Sign the quote
async function signQuote(quoteId) {
  const signPayload = {
    "quote_id": quoteId,
    "destination_address": "0x0000000000000000000000000000000000000000"
  };

  const requestOptions = {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json'
    },
    body: JSON.stringify(signPayload)
  };

  const response = await fetch('https://api.clipper.exchange/rfq/sign', requestOptions);
  const signResponse = await response.json();
  
  return signResponse;
}

// Execute transaction
async function executeSwap(signResponse) {
  const provider = new ethers.providers.JsonRpcProvider(process.env.RPC_URL);
  const exchangeContract = new ethers.Contract(
    signResponse.clipper_exchange_address,
    exchangeAbi,
    provider
  );
  
  const auxData = "0x00000000000000000000000000000000000000000000000000";

  const result = await exchangeContract.sellEthForToken(
    signResponse.output_asset_address,
    signResponse.input_amount,
    signResponse.output_amount,
    signResponse.good_until,
    signResponse.destination_address,
    [
      signResponse.signature.v,
      signResponse.signature.r,
      signResponse.signature.s,
    ],
    auxData,
    {
      value: signResponse.input_amount,
    }
  );
}

async function main() {
  // 1. Get a quote 
  const quote = await getQuote();
  console.log("Quote:", quote);
  
  // 2. Sign a quote
  const signResponse = await signQuote(quote.id);
  console.log("Sign Response:", signResponse);
  
  // 3. Execute transaction
  await executeSwap(signResponse);
  console.log("Swap executed successfully.");
}