web3x/utils/padding.js

Typescript port of web3.js

"use strict";
/*
  This file is part of web3x.

  web3x is free software: you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  web3x is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with web3x.  If not, see <http://www.gnu.org/licenses/>.
*/
Object.defineProperty(exports, "__esModule", { value: true });
/**
 * Should be called to pad string to expected length
 *
 * @method leftPad
 * @param {String} str to be padded
 * @param {Number} chars that result string should have
 * @param {String} sign, by default 0
 * @returns {String} right aligned string
 */
exports.leftPad = (str, chars, sign = '0') => {
    const hasPrefix = /^0x/i.test(str) || typeof str === 'number';
    str = str.toString().replace(/^0x/i, '');
    const padding = chars - str.length + 1 >= 0 ? chars - str.length + 1 : 0;
    return (hasPrefix ? '0x' : '') + new Array(padding).join(sign ? sign : '0') + str;
};
/**
 * Should be called to pad string to expected length
 *
 * @method rightPad
 * @param {String} str to be padded
 * @param {Number} chars that result string should have
 * @param {String} sign, by default 0
 * @returns {String} right aligned string
 */
exports.rightPad = (str, chars, sign = '0') => {
    const hasPrefix = /^0x/i.test(str) || typeof str === 'number';
    str = str.toString().replace(/^0x/i, '');
    const padding = chars - str.length + 1 >= 0 ? chars - str.length + 1 : 0;
    return (hasPrefix ? '0x' : '') + str + new Array(padding).join(sign ? sign : '0');
};
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