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import { ZeroExTransaction } from '@0x/types';
import { BigNumber } from '@0x/utils';
import * as chai from 'chai';
import 'mocha';
import { transactionHashUtils } from '../src';
import { constants } from '../src/constants';
import { chaiSetup } from './utils/chai_setup';
chaiSetup.configure();
const expect = chai.expect;
describe('0x transaction hashing', () => {
describe('#getTransactionHashHex', () => {
const expectedTransactionHash = '0x82c9bb2dcac4f868ec7a15c20ff6175cfc384c20ae6a872aa0342a840f108c2b';
const fakeVerifyingContractAddress = '0x5e72914535f202659083db3a02c984188fa26e9f';
const transaction: ZeroExTransaction = {
verifyingContractAddress: fakeVerifyingContractAddress,
signerAddress: constants.NULL_ADDRESS,
salt: new BigNumber(0),
data: constants.NULL_BYTES,
};
it('calculates the transaction hash', async () => {
const transactionHash = transactionHashUtils.getTransactionHashHex(transaction);
expect(transactionHash).to.be.equal(expectedTransactionHash);
});
it('calculates the transaction hash if amounts are strings', async () => {
// It's common for developers using javascript to provide the amounts
// as strings. Since we eventually toString() the BigNumber
// before encoding we should result in the same orderHash in this scenario
// tslint:disable-next-line:no-unnecessary-type-assertion
const transactionHash = transactionHashUtils.getTransactionHashHex({
...transaction,
salt: '0',
} as any);
expect(transactionHash).to.be.equal(expectedTransactionHash);
});
});
describe('#isValidTransactionHash', () => {
it('returns false if the value is not a hex string', () => {
const isValid = transactionHashUtils.isValidTransactionHash('not a hex');
expect(isValid).to.be.false();
});
it('returns false if the length is wrong', () => {
const isValid = transactionHashUtils.isValidTransactionHash('0xdeadbeef');
expect(isValid).to.be.false();
});
it('returns true if order hash is correct', () => {
const orderHashLength = 65;
const isValid = transactionHashUtils.isValidTransactionHash(`0x${Array(orderHashLength).join('0')}`);
expect(isValid).to.be.true();
});
});
});
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