78 lines
2.3 KiB
JavaScript
78 lines
2.3 KiB
JavaScript
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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import BigNumber from 'bignumber.js';
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import utf8 from 'utf8';
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import { isArray } from './types';
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const ZERO_64 = '0000000000000000000000000000000000000000000000000000000000000000';
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export function padAddress (_input) {
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const input = _input.substr(0, 2) === '0x' ? _input.substr(2) : _input;
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return `${ZERO_64}${input}`.slice(-64);
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}
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export function padBool (input) {
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return `${ZERO_64}${input ? '1' : '0'}`.slice(-64);
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}
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export function padU32 (input) {
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let bn = new BigNumber(input);
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if (bn.lessThan(0)) {
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bn = new BigNumber('ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff', 16)
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.plus(bn).plus(1);
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}
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return `${ZERO_64}${bn.toString(16)}`.slice(-64);
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}
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function stringToBytes (input) {
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if (isArray(input)) {
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return input;
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} else if (input.substr(0, 2) === '0x') {
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const matches = input.substr(2).toLowerCase().match(/.{1,2}/g) || [];
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return matches.map((value) => parseInt(value, 16));
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} else {
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return input.split('').map((char) => char.charCodeAt(0));
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}
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}
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export function padBytes (_input) {
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const input = stringToBytes(_input);
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return `${padU32(input.length)}${padFixedBytes(input)}`;
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}
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export function padFixedBytes (_input) {
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const input = stringToBytes(_input);
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const sinput = input.map((code) => `0${code.toString(16)}`.slice(-2)).join('');
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const max = Math.floor((sinput.length + 63) / 64) * 64;
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return `${sinput}${ZERO_64}`.substr(0, max);
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}
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export function padString (input) {
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const array = utf8.encode(input)
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.split('')
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.map((char) => char.charCodeAt(0));
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return padBytes(array);
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}
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