Agama/routes/shepherd/electrum/estimate.js

module.exports = (shepherd) => {
  shepherd.get('/electrum/estimatefee', (req, res, next) => {
    const ecl = new shepherd.electrumJSCore(shepherd.electrumServers[req.query.network].port, shepherd.electrumServers[req.query.network].address, shepherd.electrumServers[req.query.network].proto); // tcp or tls

    ecl.connect();
    ecl.blockchainEstimatefee(req.query.blocks)
    .then((json) => {
      ecl.close();
      shepherd.log('electrum estimatefee ==>', true);

      const successObj = {
        msg: 'success',
        result: json,
      };

      res.end(JSON.stringify(successObj));
    });
  });

  shepherd.estimateTxSize = (numVins, numOuts) => {
    // in x 180 + out x 34 + 10 plus or minus in
    return numVins * 180 + numOuts * 34 + 11;
  }

  return shepherd;
};