Get Circle CCTP attestation status using Hardhat and ethers js 6

cctp-attestation.js

import { ethers } from 'ethers'

const transactionHash =
  '0xc37329f7bfada70be0a695031b270741542d1dd477fc0a2e0f476d242b8ff508'

// sepolia 11155111
const srcChainRPC = 'https://sepolia.gateway.tenderly.co'

// base sepolia 84532
const destChainRPC = 'https://base-sepolia.gateway.tenderly.co'
const messengerAddress = '0x7865fAfC2db2093669d92c0F33AeEF291086BEFD'

async function main() {
  // decode message on origin chain
  const srcProvider = new ethers.JsonRpcProvider(srcChainRPC)
  const transactionReceipt =
    await srcProvider.getTransactionReceipt(transactionHash)
  const eventTopic = ethers.solidityPackedKeccak256(
    ['string'],
    ['MessageSent(bytes)']
  )
  const log = transactionReceipt?.logs.find((l) => l.topics[0] === eventTopic)
  const abiCoder = ethers.AbiCoder.defaultAbiCoder()
  const messageBytes = abiCoder.decode(['bytes'], log.data)[0]
  const messageHash = ethers.keccak256(messageBytes)

  // get attestation from Circle's servers
  // NB: url for testnets only
  const url = `https://iris-api-sandbox.circle.com/attestations/${messageHash}`
  const resp = await fetch(url)
  const { attestation, status } = await resp.json()
  console.log({ messageBytes, attestation, status })

  // receive attestation on dest server
  if (status === 'completed') {
    // get destination provider
    const destProvider = new ethers.JsonRpcProvider(destChainRPC)
    // TODO: parse signer
    // get contract
    const messenger = new ethers.Contract(
      messengerAddress,
      ['function receiveMessage(bytes,bytes)'],
      destProvider
    )
    await messenger.receiveMessage(messageBytes, attestation)
  }
}

main().then(() => console.log('ok'))