leap-node/src/txHelpers/sendTx.js

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/**
 * Copyright (c) 2018-present, Leap DAO (leapdao.org)
 *
 * This source code is licensed under the Mozilla Public License Version 2.0
 * found in the LICENSE file in the root directory of this source tree.
 */

const axios = require('axios');

const TX_BACKLOG = [];
let AWAITS_DRAIN = false;

// Drain the tx queue every ~1000ms.
// The goal here is to increase performance and mitigate block congestion.
// Bursting calls to `broadcast_tx_async` archieves that.

function drainBacklog() {
  AWAITS_DRAIN = false;

  while (TX_BACKLOG.length) {
    const func = TX_BACKLOG.shift();

    func();
  }
}

module.exports = async (tendermintPort, rawTx) => {
  const tendermintRpcUrl = `http://localhost:${tendermintPort}/broadcast_tx_async`;

  TX_BACKLOG.push(() => {
    axios.get(tendermintRpcUrl, {
      params: {
        tx: rawTx,
      },
    });
  });

  if (!AWAITS_DRAIN) {
    setTimeout(drainBacklog, 1000);
    AWAITS_DRAIN = true;
  }
};