@tetcoin/util/number/toU8a.js

A collection of useful utilities for @tetcoin

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = numberToU8a;

var _toU8a = _interopRequireDefault(require("../hex/toU8a"));

var _toHex = _interopRequireDefault(require("./toHex"));

// Copyright 2017-2019 @polkadot/util authors & contributors
// This software may be modified and distributed under the terms
// of the Apache-2.0 license. See the LICENSE file for details.

/**
 * @name numberToU8a
 * @summary Creates a Uint8Array object from a number.
 * @description
 * `null`/`undefined`/`NaN` inputs returns an empty `Uint8Array` result. `number` input values return the actual bytes value converted to a `Uint8Array`. With `bitLength`, it converts the value to the equivalent size.
 * @example
 * <BR>
 *
 * ```javascript
 * import { numberToU8a } from '@tetcoin/util';
 *
 * numberToU8a(0x1234); // => [0x12, 0x34]
 * ```
 */
function numberToU8a(value) {
  let bitLength = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : -1;

  if (!value || isNaN(value)) {
    return new Uint8Array([]);
  }

  return (0, _toU8a.default)((0, _toHex.default)(value, bitLength));
}