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import { BlockchainLifecycle } from '@0xproject/dev-utils';
import { assetDataUtils, EIP712Utils, orderHashUtils } from '@0xproject/order-utils';
import { SignedOrder } from '@0xproject/types';
import { BigNumber } from '@0xproject/utils';
import * as chai from 'chai';
import { TestConstantsContract } from '../../generated_contract_wrappers/test_constants';
import { TestLibsContract } from '../../generated_contract_wrappers/test_libs';
import { addressUtils } from '../utils/address_utils';
import { artifacts } from '../utils/artifacts';
import { chaiSetup } from '../utils/chai_setup';
import { constants } from '../utils/constants';
import { OrderFactory } from '../utils/order_factory';
import { provider, txDefaults, web3Wrapper } from '../utils/web3_wrapper';
chaiSetup.configure();
const expect = chai.expect;
const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
describe('Exchange libs', () => {
let signedOrder: SignedOrder;
let orderFactory: OrderFactory;
let libs: TestLibsContract;
let testConstants: TestConstantsContract;
before(async () => {
await blockchainLifecycle.startAsync();
});
after(async () => {
await blockchainLifecycle.revertAsync();
});
before(async () => {
const accounts = await web3Wrapper.getAvailableAddressesAsync();
const makerAddress = accounts[0];
libs = await TestLibsContract.deployFrom0xArtifactAsync(artifacts.TestLibs, provider, txDefaults);
testConstants = await TestConstantsContract.deployFrom0xArtifactAsync(
artifacts.TestConstants,
provider,
txDefaults,
);
const defaultOrderParams = {
...constants.STATIC_ORDER_PARAMS,
exchangeAddress: libs.address,
makerAddress,
feeRecipientAddress: addressUtils.generatePseudoRandomAddress(),
makerAssetData: assetDataUtils.encodeERC20AssetData(addressUtils.generatePseudoRandomAddress()),
takerAssetData: assetDataUtils.encodeERC20AssetData(addressUtils.generatePseudoRandomAddress()),
};
const privateKey = constants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(makerAddress)];
orderFactory = new OrderFactory(privateKey, defaultOrderParams);
});
beforeEach(async () => {
await blockchainLifecycle.startAsync();
});
afterEach(async () => {
await blockchainLifecycle.revertAsync();
});
describe('LibConstants', () => {
describe('ZRX_ASSET_DATA', () => {
it('should have the correct ZRX_ASSET_DATA', async () => {
const isValid = await testConstants.assertValidZrxAssetData.callAsync();
expect(isValid).to.be.equal(true);
});
});
});
describe('LibOrder', () => {
describe('getOrderSchema', () => {
it('should output the correct order schema hash', async () => {
const orderSchema = await libs.getOrderSchemaHash.callAsync();
const schemaHashBuffer = orderHashUtils._getOrderSchemaBuffer();
const schemaHashHex = `0x${schemaHashBuffer.toString('hex')}`;
expect(schemaHashHex).to.be.equal(orderSchema);
});
});
describe('getDomainSeparatorSchema', () => {
it('should output the correct domain separator schema hash', async () => {
const domainSeparatorSchema = await libs.getDomainSeparatorSchemaHash.callAsync();
const domainSchemaBuffer = EIP712Utils._getDomainSeparatorSchemaBuffer();
const schemaHashHex = `0x${domainSchemaBuffer.toString('hex')}`;
expect(schemaHashHex).to.be.equal(domainSeparatorSchema);
});
});
describe('getOrderHash', () => {
it('should output the correct orderHash', async () => {
signedOrder = await orderFactory.newSignedOrderAsync();
const orderHashHex = await libs.publicGetOrderHash.callAsync(signedOrder);
expect(orderHashUtils.getOrderHashHex(signedOrder)).to.be.equal(orderHashHex);
});
});
});
describe('LibMath', () => {
describe('isRoundingError', () => {
it('should return false if there is a rounding error of 0.1%', async () => {
const numerator = new BigNumber(20);
const denominator = new BigNumber(999);
const target = new BigNumber(50);
// rounding error = ((20*50/999) - floor(20*50/999)) / (20*50/999) = 0.1%
const isRoundingError = await libs.publicIsRoundingError.callAsync(numerator, denominator, target);
expect(isRoundingError).to.be.false();
});
it('should return false if there is a rounding of 0.09%', async () => {
const numerator = new BigNumber(20);
const denominator = new BigNumber(9991);
const target = new BigNumber(500);
// rounding error = ((20*500/9991) - floor(20*500/9991)) / (20*500/9991) = 0.09%
const isRoundingError = await libs.publicIsRoundingError.callAsync(numerator, denominator, target);
expect(isRoundingError).to.be.false();
});
it('should return true if there is a rounding error of 0.11%', async () => {
const numerator = new BigNumber(20);
const denominator = new BigNumber(9989);
const target = new BigNumber(500);
// rounding error = ((20*500/9989) - floor(20*500/9989)) / (20*500/9989) = 0.011%
const isRoundingError = await libs.publicIsRoundingError.callAsync(numerator, denominator, target);
expect(isRoundingError).to.be.true();
});
it('should return true if there is a rounding error > 0.1%', async () => {
const numerator = new BigNumber(3);
const denominator = new BigNumber(7);
const target = new BigNumber(10);
// rounding error = ((3*10/7) - floor(3*10/7)) / (3*10/7) = 6.67%
const isRoundingError = await libs.publicIsRoundingError.callAsync(numerator, denominator, target);
expect(isRoundingError).to.be.true();
});
it('should return false when there is no rounding error', async () => {
const numerator = new BigNumber(1);
const denominator = new BigNumber(2);
const target = new BigNumber(10);
const isRoundingError = await libs.publicIsRoundingError.callAsync(numerator, denominator, target);
expect(isRoundingError).to.be.false();
});
it('should return false when there is rounding error <= 0.1%', async () => {
// randomly generated numbers
const numerator = new BigNumber(76564);
const denominator = new BigNumber(676373677);
const target = new BigNumber(105762562);
// rounding error = ((76564*105762562/676373677) - floor(76564*105762562/676373677)) /
// (76564*105762562/676373677) = 0.0007%
const isRoundingError = await libs.publicIsRoundingError.callAsync(numerator, denominator, target);
expect(isRoundingError).to.be.false();
});
});
describe('getPartialAmount', () => {
it('should return the numerator/denominator*target', async () => {
const numerator = new BigNumber(1);
const denominator = new BigNumber(2);
const target = new BigNumber(10);
const partialAmount = await libs.publicGetPartialAmount.callAsync(numerator, denominator, target);
const expectedPartialAmount = 5;
expect(partialAmount).to.be.bignumber.equal(expectedPartialAmount);
});
it('should round down', async () => {
const numerator = new BigNumber(2);
const denominator = new BigNumber(3);
const target = new BigNumber(10);
const partialAmount = await libs.publicGetPartialAmount.callAsync(numerator, denominator, target);
const expectedPartialAmount = 6;
expect(partialAmount).to.be.bignumber.equal(expectedPartialAmount);
});
it('should round .5 down', async () => {
const numerator = new BigNumber(1);
const denominator = new BigNumber(20);
const target = new BigNumber(10);
const partialAmount = await libs.publicGetPartialAmount.callAsync(numerator, denominator, target);
const expectedPartialAmount = 0;
expect(partialAmount).to.be.bignumber.equal(expectedPartialAmount);
});
});
});
});
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