web3x
Version:
Typescript port of web3.js
224 lines (221 loc) • 16.4 kB
JavaScript
;
/*
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 });
const tslib_1 = require("tslib");
const bn_js_1 = tslib_1.__importDefault(require("bn.js"));
const util_1 = require("util");
const address_1 = require("../address");
const bn_1 = require("./bn");
const hex_1 = require("./hex");
const hex_utf8_1 = require("./hex-utf8");
const padding_1 = require("./padding");
const sha3_1 = require("./sha3");
const elementaryName = name => {
/*jshint maxcomplexity:false */
if (name.startsWith('int[')) {
return 'int256' + name.slice(3);
}
else if (name === 'int') {
return 'int256';
}
else if (name.startsWith('uint[')) {
return 'uint256' + name.slice(4);
}
else if (name === 'uint') {
return 'uint256';
}
else if (name.startsWith('fixed[')) {
return 'fixed128x128' + name.slice(5);
}
else if (name === 'fixed') {
return 'fixed128x128';
}
else if (name.startsWith('ufixed[')) {
return 'ufixed128x128' + name.slice(6);
}
else if (name === 'ufixed') {
return 'ufixed128x128';
}
return name;
};
// Parse N from type<N>
const parseTypeN = type => {
const typesize = /^\D+(\d+).*$/.exec(type);
return typesize ? parseInt(typesize[1], 10) : null;
};
// Parse N from type[<N>]
const parseTypeNArray = type => {
const arraySize = /^\D+\d*\[(\d+)\]$/.exec(type);
return arraySize ? parseInt(arraySize[1], 10) : null;
};
const parseNumber = arg => {
const type = typeof arg;
if (type === 'string') {
if (hex_1.isHexStrict(arg)) {
return new bn_js_1.default(arg.replace(/0x/i, ''), 16);
}
else {
return new bn_js_1.default(arg, 10);
}
}
else if (type === 'number') {
return new bn_js_1.default(arg);
}
else if (bn_1.isBN(arg)) {
return arg;
}
else {
throw new Error(arg + ' is not a number');
}
};
const solidityPack = (type, value, arraySize) => {
/*jshint maxcomplexity:false */
let size;
let num;
type = elementaryName(type);
if (type === 'bytes') {
if (value.replace(/^0x/i, '').length % 2 !== 0) {
throw new Error('Invalid bytes characters ' + value.length);
}
return value;
}
else if (type === 'string') {
return hex_utf8_1.utf8ToHex(value);
}
else if (type === 'bool') {
return value ? '01' : '00';
}
else if (type.startsWith('address')) {
if (arraySize) {
size = 64;
}
else {
size = 40;
}
if (!address_1.Address.isAddress(value)) {
throw new Error(value + ' is not a valid address, or the checksum is invalid.');
}
return padding_1.leftPad(value.toLowerCase(), size);
}
size = parseTypeN(type);
if (type.startsWith('bytes')) {
if (!size) {
throw new Error('bytes[] not yet supported in solidity');
}
// must be 32 byte slices when in an array
if (arraySize) {
size = 32;
}
if (size < 1 || size > 32 || size < value.replace(/^0x/i, '').length / 2) {
throw new Error('Invalid bytes' + size + ' for ' + value);
}
return padding_1.rightPad(value, size * 2);
}
else if (type.startsWith('uint')) {
if (size % 8 || size < 8 || size > 256) {
throw new Error('Invalid uint' + size + ' size');
}
num = parseNumber(value);
if (num.bitLength() > size) {
throw new Error('Supplied uint exceeds width: ' + size + ' vs ' + num.bitLength());
}
if (num.lt(new bn_js_1.default(0))) {
throw new Error('Supplied uint ' + num.toString() + ' is negative');
}
return size ? padding_1.leftPad(num.toString('hex'), (size / 8) * 2) : num;
}
else if (type.startsWith('int')) {
if (size % 8 || size < 8 || size > 256) {
throw new Error('Invalid int' + size + ' size');
}
num = parseNumber(value);
if (num.bitLength() > size) {
throw new Error('Supplied int exceeds width: ' + size + ' vs ' + num.bitLength());
}
if (num.lt(new bn_js_1.default(0))) {
return num.toTwos(size).toString('hex');
}
else {
return size ? padding_1.leftPad(num.toString('hex'), (size / 8) * 2) : num;
}
}
else {
// FIXME: support all other types
throw new Error('Unsupported or invalid type: ' + type);
}
};
const processSoliditySha3Args = arg => {
/*jshint maxcomplexity:false */
if (util_1.isArray(arg)) {
throw new Error('Autodetection of array types is not supported.');
}
let type;
let value = '';
let hexArg;
let arraySize;
// if type is given
if (util_1.isObject(arg) &&
(arg.hasOwnProperty('v') || arg.hasOwnProperty('t') || arg.hasOwnProperty('value') || arg.hasOwnProperty('type'))) {
type = arg.hasOwnProperty('t') ? arg.t : arg.type;
value = arg.hasOwnProperty('v') ? arg.v : arg.value;
// otherwise try to guess the type
}
else {
type = hex_1.toHex(arg, true);
value = hex_1.toHex(arg);
if (!type.startsWith('int') && !type.startsWith('uint')) {
type = 'bytes';
}
}
if ((type.startsWith('int') || type.startsWith('uint')) && typeof value === 'string' && !/^(-)?0x/i.test(value)) {
value = new bn_js_1.default(value);
}
// get the array size
if (util_1.isArray(value)) {
arraySize = parseTypeNArray(type);
if (arraySize && value.length !== arraySize) {
throw new Error(type + ' is not matching the given array ' + JSON.stringify(value));
}
else {
arraySize = value.length;
}
}
if (util_1.isArray(value)) {
hexArg = value.map(val => {
return solidityPack(type, val, arraySize)
.toString('hex')
.replace('0x', '');
});
return hexArg.join('');
}
else {
hexArg = solidityPack(type, value, arraySize);
return hexArg.toString('hex').replace('0x', '');
}
};
/**
* Hashes solidity values to a sha3 hash using keccak 256
*
* @method soliditySha3
* @return {Object} the sha3
*/
exports.soliditySha3 = (...args) => {
/*jshint maxcomplexity:false */
const hexArgs = args.map(processSoliditySha3Args);
// console.log(args, hexArgs);
// console.log('0x'+ hexArgs.join(''));
return sha3_1.sha3('0x' + hexArgs.join(''));
};
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