How to use the airswap.js/src/protocolMessaging/index.js function in airswap

indexer.ready.then(async () => {
  const router = new Router({ requireAuthentication: false, address: ethers.Wallet.createRandom().address })
  try {
    const intents = await indexer.getIntents()
    const { method, senderToken, signerToken, senderParam, signerParam } = message
    const filteredIntents = intents.filter(intent => {
      if (
        intent.signerToken === signerToken.toLowerCase() && // eslint-disable-line
        intent.senderToken === senderToken.toLowerCase() && // eslint-disable-line
        intent.locatorType === 'https'
      ) {
        return true
      }
      return false
    })

    if (method === 'getSenderSideQuotes') {
      const quotePromises = filteredIntents.map(intent => {