@coolwallet/xlm/lib/utils/transactionUtil.js

Coolwallet Stella sdk

"use strict";

function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.encodeCheck = encodeCheck;
exports.encodeEd25519PublicKey = encodeEd25519PublicKey;
exports.pubKeyToAddress = pubKeyToAddress;

var _crc = _interopRequireDefault(require("crc"));

var params = _interopRequireWildcard(require("../config/params"));

function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }

function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

/* eslint-disable no-bitwise */
var base32 = require('base32.js');

function calculateChecksum(payload) {
  // This code calculates CRC16-XModem checksum of payload
  // and returns it as Buffer in little-endian order.
  var checksum = Buffer.allocUnsafe(2);
  checksum.writeUInt16LE(_crc["default"].crc16xmodem(payload), 0);
  return checksum;
}

function encodeCheck(versionByteName, data) {
  var versionByte = params.VERSION_BYTES[versionByteName];
  var versionBuffer = Buffer.from([versionByte]);
  var payload = Buffer.concat([versionBuffer, data]);
  var checksum = calculateChecksum(payload);
  var unencoded = Buffer.concat([payload, checksum]);
  return base32.encode(unencoded);
}

function encodeEd25519PublicKey(data) {
  return encodeCheck('ed25519PublicKey', data);
}

function pubKeyToAddress(publicKey) {
  var pubKey = publicKey.length === 66 ? publicKey.slice(2) : publicKey;
  var pubKeyBuf = Buffer.from(pubKey, 'hex');
  return encodeEd25519PublicKey(pubKeyBuf);
}
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