import { BlockchainLifecycle } from '@0xproject/dev-utils';
import { Order, RevertReason, SignedOrder } from '@0xproject/types';
import { BigNumber } from '@0xproject/utils';
import * as _ from 'lodash';
import { TestExchangeInternalsContract } from '../../generated_contract_wrappers/test_exchange_internals';
import { artifacts } from '../utils/artifacts';
import {
getInvalidOpcodeErrorMessageForCallAsync,
getRevertReasonOrErrorMessageForSendTransactionAsync,
} from '../utils/assertions';
import { chaiSetup } from '../utils/chai_setup';
import { bytes32Values, testCombinatoriallyWithReferenceFuncAsync, uint256Values } from '../utils/combinatorial_utils';
import { constants } from '../utils/constants';
import { FillResults } from '../utils/types';
import { provider, txDefaults, web3Wrapper } from '../utils/web3_wrapper';
chaiSetup.configure();
const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
const MAX_UINT256 = new BigNumber(2).pow(256).minus(1);
const emptyOrder: Order = {
senderAddress: constants.NULL_ADDRESS,
makerAddress: constants.NULL_ADDRESS,
takerAddress: constants.NULL_ADDRESS,
makerFee: new BigNumber(0),
takerFee: new BigNumber(0),
makerAssetAmount: new BigNumber(0),
takerAssetAmount: new BigNumber(0),
makerAssetData: '0x',
takerAssetData: '0x',
salt: new BigNumber(0),
exchangeAddress: constants.NULL_ADDRESS,
feeRecipientAddress: constants.NULL_ADDRESS,
expirationTimeSeconds: new BigNumber(0),
};
const emptySignedOrder: SignedOrder = {
...emptyOrder,
signature: '',
};
const overflowErrorForCall = new Error(RevertReason.Uint256Overflow);
async function referenceGetPartialAmountAsync(
numerator: BigNumber,
denominator: BigNumber,
target: BigNumber,
): Promise<BigNumber> {
const invalidOpcodeErrorForCall = new Error(await getInvalidOpcodeErrorMessageForCallAsync());
const product = numerator.mul(target);
if (product.greaterThan(MAX_UINT256)) {
throw overflowErrorForCall;
}
if (denominator.eq(0)) {
throw invalidOpcodeErrorForCall;
}
return product.dividedToIntegerBy(denominator);
}
describe('Exchange core internal functions', () => {
let testExchange: TestExchangeInternalsContract;
let invalidOpcodeErrorForCall: Error | undefined;
let overflowErrorForSendTransaction: Error | undefined;
let divisionByZeroErrorForCall: Error | undefined;
before(async () => {
await blockchainLifecycle.startAsync();
});
after(async () => {
await blockchainLifecycle.revertAsync();
});
before(async () => {
testExchange = await TestExchangeInternalsContract.deployFrom0xArtifactAsync(
artifacts.TestExchangeInternals,
provider,
txDefaults,
);
overflowErrorForSendTransaction = new Error(
await getRevertReasonOrErrorMessageForSendTransactionAsync(RevertReason.Uint256Overflow),
);
divisionByZeroErrorForCall = new Error(
await getRevertReasonOrErrorMessageForSendTransactionAsync(RevertReason.DivisionByZero),
);
invalidOpcodeErrorForCall = new Error(await getInvalidOpcodeErrorMessageForCallAsync());
});
// Note(albrow): Don't forget to add beforeEach and afterEach calls to reset
// the blockchain state for any tests which modify it!
describe('addFillResults', async () => {
function makeFillResults(value: BigNumber): FillResults {
return {
makerAssetFilledAmount: value,
takerAssetFilledAmount: value,
makerFeePaid: value,
takerFeePaid: value,
};
}
async function referenceAddFillResultsAsync(
totalValue: BigNumber,
singleValue: BigNumber,
): Promise<FillResults> {
// Note(albrow): Here, each of totalFillResults and
// singleFillResults will consist of fields with the same values.
// This should be safe because none of the fields in a given
// FillResults are ever used together in a mathemetical operation.
// They are only used with the corresponding field from *the other*
// FillResults, which are different.
const totalFillResults = makeFillResults(totalValue);
const singleFillResults = makeFillResults(singleValue);
// HACK(albrow): _.mergeWith mutates the first argument! To
// workaround this we use _.cloneDeep.
return _.mergeWith(
_.cloneDeep(totalFillResults),
singleFillResults,
(totalVal: BigNumber, singleVal: BigNumber) => {
const newTotal = totalVal.add(singleVal);
if (newTotal.greaterThan(MAX_UINT256)) {
throw overflowErrorForCall;
}
return newTotal;
},
);
}
async function testAddFillResultsAsync(totalValue: BigNumber, singleValue: BigNumber): Promise<FillResults> {
const totalFillResults = makeFillResults(totalValue);
const singleFillResults = makeFillResults(singleValue);
return testExchange.publicAddFillResults.callAsync(totalFillResults, singleFillResults);
}
await testCombinatoriallyWithReferenceFuncAsync(
'addFillResults',
referenceAddFillResultsAsync,
testAddFillResultsAsync,
[uint256Values, uint256Values],
);
});
describe('calculateFillResults', async () => {
function makeOrder(
makerAssetAmount: BigNumber,
takerAssetAmount: BigNumber,
makerFee: BigNumber,
takerFee: BigNumber,
): Order {
return {
...emptyOrder,
makerAssetAmount,
takerAssetAmount,
makerFee,
takerFee,
};
}
async function referenceCalculateFillResultsAsync(
orderTakerAssetAmount: BigNumber,
takerAssetFilledAmount: BigNumber,
otherAmount: BigNumber,
): Promise<FillResults> {
// Note(albrow): Here we are re-using the same value (otherAmount)
// for order.makerAssetAmount, order.makerFee, and order.takerFee.
// This should be safe because they are never used with each other
// in any mathematical operation in either the reference TypeScript
// implementation or the Solidity implementation of
// calculateFillResults.
return {
makerAssetFilledAmount: await referenceGetPartialAmountAsync(
takerAssetFilledAmount,
orderTakerAssetAmount,
otherAmount,
),
takerAssetFilledAmount,
makerFeePaid: await referenceGetPartialAmountAsync(
takerAssetFilledAmount,
orderTakerAssetAmount,
otherAmount,
),
takerFeePaid: await referenceGetPartialAmountAsync(
takerAssetFilledAmount,
orderTakerAssetAmount,
otherAmount,
),
};
}
async function testCalculateFillResultsAsync(
orderTakerAssetAmount: BigNumber,
takerAssetFilledAmount: BigNumber,
otherAmount: BigNumber,
): Promise<FillResults> {
const order = makeOrder(otherAmount, orderTakerAssetAmount, otherAmount, otherAmount);
return testExchange.publicCalculateFillResults.callAsync(order, takerAssetFilledAmount);
}
await testCombinatoriallyWithReferenceFuncAsync(
'calculateFillResults',
referenceCalculateFillResultsAsync,
testCalculateFillResultsAsync,
[uint256Values, uint256Values, uint256Values],
);
});
describe('getPartialAmount', async () => {
async function testGetPartialAmountAsync(
numerator: BigNumber,
denominator: BigNumber,
target: BigNumber,
): Promise<BigNumber> {
return testExchange.publicGetPartialAmount.callAsync(numerator, denominator, target);
}
await testCombinatoriallyWithReferenceFuncAsync(
'getPartialAmount',
referenceGetPartialAmountAsync,
testGetPartialAmountAsync,
[uint256Values, uint256Values, uint256Values],
);
});
describe('isRoundingError', async () => {
async function referenceIsRoundingErrorAsync(
numerator: BigNumber,
denominator: BigNumber,
target: BigNumber,
): Promise<boolean> {
if (denominator.eq(0)) {
throw divisionByZeroErrorForCall;
}
if (numerator.eq(0)) {
return false;
}
if (target.eq(0)) {
return false;
}
const product = numerator.mul(target);
const remainder = product.mod(denominator);
const remainderTimes1000 = remainder.mul('1000');
const isError = remainderTimes1000.gt(product);
if (product.greaterThan(MAX_UINT256)) {
throw overflowErrorForCall;
}
if (remainderTimes1000.greaterThan(MAX_UINT256)) {
throw overflowErrorForCall;
}
return isError;
}
async function testIsRoundingErrorAsync(
numerator: BigNumber,
denominator: BigNumber,
target: BigNumber,
): Promise<boolean> {
return testExchange.publicIsRoundingError.callAsync(numerator, denominator, target);
}
await testCombinatoriallyWithReferenceFuncAsync(
'isRoundingError',
referenceIsRoundingErrorAsync,
testIsRoundingErrorAsync,
[uint256Values, uint256Values, uint256Values],
);
});
describe('updateFilledState', async () => {
// Note(albrow): Since updateFilledState modifies the state by calling
// sendTransaction, we must reset the state after each test.
beforeEach(async () => {
await blockchainLifecycle.startAsync();
});
afterEach(async () => {
await blockchainLifecycle.revertAsync();
});
async function referenceUpdateFilledStateAsync(
takerAssetFilledAmount: BigNumber,
orderTakerAssetFilledAmount: BigNumber,
// tslint:disable-next-line:no-unused-variable
orderHash: string,
): Promise<BigNumber> {
const totalFilledAmount = takerAssetFilledAmount.add(orderTakerAssetFilledAmount);
if (totalFilledAmount.greaterThan(MAX_UINT256)) {
throw overflowErrorForSendTransaction;
}
return totalFilledAmount;
}
async function testUpdateFilledStateAsync(
takerAssetFilledAmount: BigNumber,
orderTakerAssetFilledAmount: BigNumber,
orderHash: string,
): Promise<BigNumber> {
const fillResults = {
makerAssetFilledAmount: new BigNumber(0),
takerAssetFilledAmount,
makerFeePaid: new BigNumber(0),
takerFeePaid: new BigNumber(0),
};
await web3Wrapper.awaitTransactionSuccessAsync(
await testExchange.publicUpdateFilledState.sendTransactionAsync(
emptySignedOrder,
constants.NULL_ADDRESS,
orderHash,
orderTakerAssetFilledAmount,
fillResults,
),
constants.AWAIT_TRANSACTION_MINED_MS,
);
return testExchange.filled.callAsync(orderHash);
}
await testCombinatoriallyWithReferenceFuncAsync(
'updateFilledState',
referenceUpdateFilledStateAsync,
testUpdateFilledStateAsync,
[uint256Values, uint256Values, bytes32Values],
);
});
});
