bitcore-wallet-service/bit-wallet/bit-sign

#!/usr/bin/env node

var _ = require('lodash');
var fs = require('fs');
var program = require('commander');
var utils = require('./cli-utils');
program = utils.configureCommander(program);

program
  .usage('[options] <txpid>')
  .option('-i, --input [filename]', 'use signatures from file')
  .option('-o, --output [filename]', 'write signatures to  file')
  .parse(process.argv);

var args = program.args;
var txpid = args[0] || '';

var client = utils.getClient(program);
client.getTxProposals({}, function(err, txps) {
  utils.die(err);

  var txp = utils.findOneTxProposal(txps, txpid);

  if (program.output) {
    client.getSignatures(txp, function(err, signatures) {
      utils.die(err);
      var out = {
        id: txp.id,
        signatures: signatures,
      };
      fs.writeFileSync(program.output, JSON.stringify(out));
      console.log('Signatures written to file.');
    });
  } else {

    if (program.input) {
      var infile = JSON.parse(fs.readFileSync(program.input));
      if (infile.id != txp.id)
        utils.die('Signatures does not match Transaction')

      txp.signatures = infile.signatures;
    }

    client.signTxProposal(txp, function(err, tx) {
      utils.die(err);
      if (tx.status == 'broadcasted')
        console.log('Transaction Broadcasted: TXID: ' + tx.txid);
      else
        console.log('Transaction signed by you.');
    });
  }
});