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Improvements and conventions in utils package + abi decoder

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This commit is contained in:
Greg Hysen
2019-02-08 14:46:39 -08:00
parent 6d0dc47157
commit 500b4940a3
10 changed files with 57 additions and 69 deletions
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26
packages/utils/src/address_utils.ts
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@@ -1,13 +1,10 @@
import { addHexPrefix, sha3, stripHexPrefix } from 'ethereumjs-util';
import { addHexPrefix, stripHexPrefix } from 'ethereumjs-util';
import * as jsSHA3 from 'js-sha3';
import * as _ from 'lodash';
import { BigNumber } from './configured_bignumber';
const BASIC_ADDRESS_REGEX = /^(0x)?[0-9a-f]{40}$/i;
const SAME_CASE_ADDRESS_REGEX = /^(0x)?([0-9a-f]{40}|[0-9A-F]{40})$/;
const ADDRESS_LENGTH = 40;
const MAX_DIGITS_IN_UNSIGNED_256_INT = 78;
export const addressUtils = {
isChecksumAddress(address: string): boolean {
@@ -46,25 +43,4 @@ export const addressUtils = {
padZeros(address: string): string {
return addHexPrefix(_.padStart(stripHexPrefix(address), ADDRESS_LENGTH, '0'));
},
/**
* Generates a pseudo-random 256-bit salt.
* The salt can be included in a 0x order, ensuring that the order generates a unique orderHash
* and will not collide with other outstanding orders that are identical in all other parameters.
* @return A pseudo-random 256-bit number that can be used as a salt.
*/
generatePseudoRandomSalt(): BigNumber {
// BigNumber.random returns a pseudo-random number between 0 & 1 with a passed in number of decimal places.
// Source: https://mikemcl.github.io/bignumber.js/#random
const randomNumber = BigNumber.random(MAX_DIGITS_IN_UNSIGNED_256_INT);
const factor = new BigNumber(10).pow(MAX_DIGITS_IN_UNSIGNED_256_INT - 1);
const salt = randomNumber.times(factor);
return salt;
},
generatePseudoRandomAddress(): string {
const randomBigNum = addressUtils.generatePseudoRandomSalt();
const randomBuff = sha3(randomBigNum.toString());
const addressLengthInBytes = 20;
const randomAddress = `0x${randomBuff.slice(0, addressLengthInBytes).toString('hex')}`;
return randomAddress;
},
};