@polkadot/util/cjs/hex/toBn.js

A collection of useful utilities for @polkadot

"use strict";

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

var _bn = require("../bn/bn");

var _boolean = require("../is/boolean");

var _spread = require("../object/spread");

var _stripPrefix = require("./stripPrefix");

// Copyright 2017-2022 @polkadot/util authors & contributors
// SPDX-License-Identifier: Apache-2.0

/** @deprecated Use hexToBn (value?: string | null, options?: ToBnOptions) */
function hexToBn(value) {
  let options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

  if (!value || value === '0x') {
    return new _bn.BN(0);
  } // For hex, default to BE


  const {
    isLe,
    isNegative
  } = (0, _spread.objectSpread)({
    isLe: false,
    isNegative: false
  }, (0, _boolean.isBoolean)(options) ? {
    isLe: options
  } : options);
  const stripped = (0, _stripPrefix.hexStripPrefix)(value);
  const bn = new _bn.BN(stripped, 16, isLe ? 'le' : 'be'); // fromTwos takes as parameter the number of bits, which is the hex length
  // multiplied by 4 (2 bytes being 8 bits)

  return isNegative ? bn.fromTwos(stripped.length * 4) : bn;
}