bitcore-wallet-service/bit-wallet/bit-export

#!/usr/bin/env node

var program = require('commander');
var qr = require('qr-image');
var fs = require('fs');
var _ = require('lodash');

var Client = require('../lib/client');
var utils = require('./cli-utils');
program = utils.configureCommander(program);

program
  .option('-a, --access [level]', 'access privileges for exported data (full, readwrite, readonly)', 'full')
  .option('-q, --qr', 'export a QR code')
  .option('-o, --output [filename]', 'output file');

program.on('--help', function() {
  console.log('  Access Levels:');
  console.log('');
  console.log('    readonly : allows to read wallet data: balance, tx proposals ');
  console.log('    readwrite: + allows to create addresses and unsigned tx prposals ');
  console.log('    full     : + allows sign tx prposals ');
  console.log('');
});

program
  .parse(process.argv);

var args = program.args;
var client = utils.getClient(program);

if (!_.contains(['full', 'readwrite', 'readonly'], program.access)) {
  program.help();
}

var msg = ' Access Level: ' + program.access;

client.export({
  access: program.access
}, function(err, x) {
  utils.die(err);
  if (program.qr) {
    var filename = program.file + '.svg';
    var qr_svg = qr.image(x, {
      type: 'svg'
    });
    qr_svg.pipe(fs.createWriteStream(filename));
    console.log('Wallet Critical Data: exported to %s. %s\n',filename, msg);
  } else {
    if (program.output) {
      fs.writeFileSync(program.output, x);
      console.log('Wallet Critical Data saved at %s. %s\n', program.output, msg);
    } else {
      console.log('Wallet Critical Data (%s)\n%s', msg,  x);
    }
  }
});