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|
import * as _ from 'lodash';
import * as BigNumber from 'bignumber.js';
import promisify = require('es6-promisify');
import {Web3Wrapper} from '../web3_wrapper';
import {
ECSignature,
ExchangeContract,
ExchangeContractErrCodes,
ExchangeContractErrs,
ZeroExError,
OrderValues,
OrderAddresses,
Order,
OrderFillOrKillRequest,
SignedOrder,
ContractEvent,
ExchangeEvents,
ContractEventEmitter,
SubscriptionOpts,
IndexedFilterValues,
CreateContractEvent,
ContractEventObj,
ContractResponse,
OrderCancellationRequest,
OrderFillRequest,
LogErrorContractEventArgs,
LogFillContractEventArgs,
LogCancelContractEventArgs,
} from '../types';
import {assert} from '../utils/assert';
import {utils} from '../utils/utils';
import {eventUtils} from '../utils/event_utils';
import {OrderValidationUtils} from '../utils/order_validation_utils';
import {ContractWrapper} from './contract_wrapper';
import {ecSignatureSchema} from '../schemas/ec_signature_schema';
import {signedOrdersSchema} from '../schemas/signed_orders_schema';
import {subscriptionOptsSchema} from '../schemas/subscription_opts_schema';
import {indexFilterValuesSchema} from '../schemas/index_filter_values_schema';
import {orderFillRequestsSchema} from '../schemas/order_fill_requests_schema';
import {orderCancellationRequestsSchema} from '../schemas/order_cancel_schema';
import {orderFillOrKillRequestsSchema} from '../schemas/order_fill_or_kill_requests_schema';
import {orderHashSchema} from '../schemas/order_hash_schema';
import {signedOrderSchema, orderSchema} from '../schemas/order_schemas';
import {constants} from '../utils/constants';
import {TokenWrapper} from './token_wrapper';
import {decorators} from '../utils/decorators';
import * as ExchangeArtifacts from '../artifacts/Exchange.json';
/**
* This class includes all the functionality related to calling methods and subscribing to
* events of the 0x Exchange smart contract.
*/
export class ExchangeWrapper extends ContractWrapper {
private _exchangeContractErrCodesToMsg = {
[ExchangeContractErrCodes.ERROR_FILL_EXPIRED]: ExchangeContractErrs.OrderFillExpired,
[ExchangeContractErrCodes.ERROR_CANCEL_EXPIRED]: ExchangeContractErrs.OrderFillExpired,
[ExchangeContractErrCodes.ERROR_FILL_NO_VALUE]: ExchangeContractErrs.OrderRemainingFillAmountZero,
[ExchangeContractErrCodes.ERROR_CANCEL_NO_VALUE]: ExchangeContractErrs.OrderRemainingFillAmountZero,
[ExchangeContractErrCodes.ERROR_FILL_TRUNCATION]: ExchangeContractErrs.OrderFillRoundingError,
[ExchangeContractErrCodes.ERROR_FILL_BALANCE_ALLOWANCE]: ExchangeContractErrs.FillBalanceAllowanceError,
};
private _exchangeContractIfExists?: ExchangeContract;
private _exchangeLogEventEmitters: ContractEventEmitter[];
private _orderValidationUtils: OrderValidationUtils;
private _tokenWrapper: TokenWrapper;
private static _getOrderAddressesAndValues(order: Order): [OrderAddresses, OrderValues] {
const orderAddresses: OrderAddresses = [
order.maker,
order.taker,
order.makerTokenAddress,
order.takerTokenAddress,
order.feeRecipient,
];
const orderValues: OrderValues = [
order.makerTokenAmount,
order.takerTokenAmount,
order.makerFee,
order.takerFee,
order.expirationUnixTimestampSec,
order.salt,
];
return [orderAddresses, orderValues];
}
constructor(web3Wrapper: Web3Wrapper, tokenWrapper: TokenWrapper) {
super(web3Wrapper);
this._tokenWrapper = tokenWrapper;
this._orderValidationUtils = new OrderValidationUtils(tokenWrapper);
this._exchangeLogEventEmitters = [];
}
/**
* Returns the unavailable takerAmount of an order. Unavailable amount is defined as the total
* amount that has been filled or cancelled. The remaining takerAmount can be calculated by
* subtracting the unavailable amount from the total order takerAmount.
* @param orderHash The hex encoded orderHash for which you would like to retrieve the
* unavailable takerAmount.
* @return The amount of the order (in taker tokens) that has either been filled or canceled.
*/
public async getUnavailableTakerAmountAsync(orderHash: string): Promise<BigNumber.BigNumber> {
assert.doesConformToSchema('orderHash', orderHash, orderHashSchema);
const exchangeContract = await this._getExchangeContractAsync();
let unavailableTakerTokenAmount = await exchangeContract.getUnavailableTakerTokenAmount.call(orderHash);
// Wrap BigNumbers returned from web3 with our own (later) version of BigNumber
unavailableTakerTokenAmount = new BigNumber(unavailableTakerTokenAmount);
return unavailableTakerTokenAmount;
}
/**
* Retrieve the takerAmount of an order that has already been filled.
* @param orderHash The hex encoded orderHash for which you would like to retrieve the filled takerAmount.
* @return The amount of the order (in taker tokens) that has already been filled.
*/
public async getFilledTakerAmountAsync(orderHash: string): Promise<BigNumber.BigNumber> {
assert.doesConformToSchema('orderHash', orderHash, orderHashSchema);
const exchangeContract = await this._getExchangeContractAsync();
let fillAmountInBaseUnits = await exchangeContract.filled.call(orderHash);
// Wrap BigNumbers returned from web3 with our own (later) version of BigNumber
fillAmountInBaseUnits = new BigNumber(fillAmountInBaseUnits);
return fillAmountInBaseUnits;
}
/**
* Retrieve the takerAmount of an order that has been cancelled.
* @param orderHash The hex encoded orderHash for which you would like to retrieve the
* cancelled takerAmount.
* @return The amount of the order (in taker tokens) that has been cancelled.
*/
public async getCanceledTakerAmountAsync(orderHash: string): Promise<BigNumber.BigNumber> {
assert.doesConformToSchema('orderHash', orderHash, orderHashSchema);
const exchangeContract = await this._getExchangeContractAsync();
let cancelledAmountInBaseUnits = await exchangeContract.cancelled.call(orderHash);
// Wrap BigNumbers returned from web3 with our own (later) version of BigNumber
cancelledAmountInBaseUnits = new BigNumber(cancelledAmountInBaseUnits);
return cancelledAmountInBaseUnits;
}
/**
* Fills a signed order with an amount denominated in baseUnits of the taker token.
* Since the order in which transactions are included in the next block is indeterminate, race-conditions
* could arise where a users balance or allowance changes before the fillOrder executes. Because of this,
* we allow you to specify `shouldThrowOnInsufficientBalanceOrAllowance`.
* If false, the smart contract will not throw if the parties
* do not have sufficient balances/allowances, preserving gas costs. Setting it to true forgoes this check
* and causes the smart contract to throw (using all the gas supplied) instead.
* @param signedOrder An object that conforms to the SignedOrder interface.
* @param fillTakerTokenAmount The amount of the order (in taker tokens baseUnits) that
* you wish to fill.
* @param shouldThrowOnInsufficientBalanceOrAllowance Whether or not you wish for the contract call to throw
* if upon execution the tokens cannot be transferred.
* @param takerAddress The user Ethereum address who would like to fill this order.
* Must be available via the supplied Web3.Provider
* passed to 0x.js.
* @return The amount of the order that was filled (in taker token baseUnits).
*/
@decorators.contractCallErrorHandler
public async fillOrderAsync(signedOrder: SignedOrder, fillTakerTokenAmount: BigNumber.BigNumber,
shouldThrowOnInsufficientBalanceOrAllowance: boolean,
takerAddress: string): Promise<BigNumber.BigNumber> {
assert.doesConformToSchema('signedOrder', signedOrder, signedOrderSchema);
assert.isBigNumber('fillTakerTokenAmount', fillTakerTokenAmount);
assert.isBoolean('shouldThrowOnInsufficientBalanceOrAllowance', shouldThrowOnInsufficientBalanceOrAllowance);
await assert.isSenderAddressAsync('takerAddress', takerAddress, this._web3Wrapper);
const exchangeInstance = await this._getExchangeContractAsync();
await this._validateFillOrderAndThrowIfInvalidAsync(signedOrder, fillTakerTokenAmount, takerAddress);
const [orderAddresses, orderValues] = ExchangeWrapper._getOrderAddressesAndValues(signedOrder);
const gas = await exchangeInstance.fillOrder.estimateGas(
orderAddresses,
orderValues,
fillTakerTokenAmount,
shouldThrowOnInsufficientBalanceOrAllowance,
signedOrder.ecSignature.v,
signedOrder.ecSignature.r,
signedOrder.ecSignature.s,
{
from: takerAddress,
},
);
const response: ContractResponse = await exchangeInstance.fillOrder(
orderAddresses,
orderValues,
fillTakerTokenAmount,
shouldThrowOnInsufficientBalanceOrAllowance,
signedOrder.ecSignature.v,
signedOrder.ecSignature.r,
signedOrder.ecSignature.s,
{
from: takerAddress,
gas,
},
);
this._throwErrorLogsAsErrors(response.logs);
const logFillArgs = response.logs[0].args as LogFillContractEventArgs;
const filledTakerTokenAmount = new BigNumber(logFillArgs.filledTakerTokenAmount);
return filledTakerTokenAmount;
}
/**
* Sequentially and atomically fills signedOrders up to the specified takerTokenFillAmount.
* If the fill amount is reached - it succeeds and does not fill the rest of the orders.
* If fill amount is not reached - it fills as much of the fill amount as possible and succeeds.
* @param signedOrders The array of signedOrders that you would like to fill until
* takerTokenFillAmount is reached.
* @param fillTakerTokenAmount The total amount of the takerTokens you would like to fill.
* @param shouldThrowOnInsufficientBalanceOrAllowance Whether or not you wish for the contract call to throw if
* upon execution any of the tokens cannot be transferred.
* If set to false, the call will continue to fill subsequent
* signedOrders even when some cannot be filled.
* @param takerAddress The user Ethereum address who would like to fill these
* orders. Must be available via the supplied Web3.Provider
* passed to 0x.js.
* @return The amount of the orders that was filled (in taker token baseUnits).
*/
@decorators.contractCallErrorHandler
public async fillOrdersUpToAsync(signedOrders: SignedOrder[], fillTakerTokenAmount: BigNumber.BigNumber,
shouldThrowOnInsufficientBalanceOrAllowance: boolean,
takerAddress: string): Promise<BigNumber.BigNumber> {
assert.doesConformToSchema('signedOrders', signedOrders, signedOrdersSchema);
const takerTokenAddresses = _.map(signedOrders, signedOrder => signedOrder.takerTokenAddress);
assert.hasAtMostOneUniqueValue(takerTokenAddresses,
ExchangeContractErrs.MultipleTakerTokensInFillUpToDisallowed);
const exchangeContractAddresses = _.map(signedOrders, signedOrder => signedOrder.exchangeContractAddress);
assert.hasAtMostOneUniqueValue(exchangeContractAddresses,
ExchangeContractErrs.BatchOrdersMustHaveSameExchangeAddress);
assert.isBigNumber('fillTakerTokenAmount', fillTakerTokenAmount);
assert.isBoolean('shouldThrowOnInsufficientBalanceOrAllowance', shouldThrowOnInsufficientBalanceOrAllowance);
await assert.isSenderAddressAsync('takerAddress', takerAddress, this._web3Wrapper);
for (const signedOrder of signedOrders) {
await this._validateFillOrderAndThrowIfInvalidAsync(
signedOrder, fillTakerTokenAmount, takerAddress);
}
if (_.isEmpty(signedOrders)) {
return new BigNumber(0); // no-op
}
const orderAddressesValuesAndSignatureArray = _.map(signedOrders, signedOrder => {
return [
...ExchangeWrapper._getOrderAddressesAndValues(signedOrder),
signedOrder.ecSignature.v,
signedOrder.ecSignature.r,
signedOrder.ecSignature.s,
];
});
// We use _.unzip<any> because _.unzip doesn't type check if values have different types :'(
const [orderAddressesArray, orderValuesArray, vArray, rArray, sArray] = _.unzip<any>(
orderAddressesValuesAndSignatureArray,
);
const exchangeInstance = await this._getExchangeContractAsync();
const gas = await exchangeInstance.fillOrdersUpTo.estimateGas(
orderAddressesArray,
orderValuesArray,
fillTakerTokenAmount,
shouldThrowOnInsufficientBalanceOrAllowance,
vArray,
rArray,
sArray,
{
from: takerAddress,
},
);
const response: ContractResponse = await exchangeInstance.fillOrdersUpTo(
orderAddressesArray,
orderValuesArray,
fillTakerTokenAmount,
shouldThrowOnInsufficientBalanceOrAllowance,
vArray,
rArray,
sArray,
{
from: takerAddress,
gas,
},
);
this._throwErrorLogsAsErrors(response.logs);
let filledTakerTokenAmount = new BigNumber(0);
_.each(response.logs, log => {
filledTakerTokenAmount = filledTakerTokenAmount.plus(
(log.args as LogFillContractEventArgs).filledTakerTokenAmount);
});
return filledTakerTokenAmount;
}
/**
* Batch version of fillOrderAsync.
* Executes multiple fills atomically in a single transaction.
* If shouldThrowOnInsufficientBalanceOrAllowance is set to true, it will continue filling subsequent orders even
* when earlier ones fail.
* When shouldThrowOnInsufficientBalanceOrAllowance is set to false, if any fill fails, the entire batch fails.
* @param orderFillRequests An array of objects that conform to the
* OrderFillRequest interface.
* @param shouldThrowOnInsufficientBalanceOrAllowance Whether or not you wish for the contract call to throw
* if upon execution any of the tokens cannot be
* transferred. If set to false, the call will continue to
* fill subsequent signedOrders even when some
* cannot be filled.
* @param takerAddress The user Ethereum address who would like to fill
* these orders. Must be available via the supplied
* Web3.Provider passed to 0x.js.
*/
@decorators.contractCallErrorHandler
public async batchFillOrdersAsync(orderFillRequests: OrderFillRequest[],
shouldThrowOnInsufficientBalanceOrAllowance: boolean,
takerAddress: string): Promise<void> {
assert.doesConformToSchema('orderFillRequests', orderFillRequests, orderFillRequestsSchema);
const exchangeContractAddresses = _.map(
orderFillRequests,
orderFillRequest => orderFillRequest.signedOrder.exchangeContractAddress,
);
assert.hasAtMostOneUniqueValue(exchangeContractAddresses,
ExchangeContractErrs.BatchOrdersMustHaveSameExchangeAddress);
assert.isBoolean('shouldThrowOnInsufficientBalanceOrAllowance', shouldThrowOnInsufficientBalanceOrAllowance);
await assert.isSenderAddressAsync('takerAddress', takerAddress, this._web3Wrapper);
for (const orderFillRequest of orderFillRequests) {
await this._validateFillOrderAndThrowIfInvalidAsync(
orderFillRequest.signedOrder, orderFillRequest.takerTokenFillAmount, takerAddress);
}
if (_.isEmpty(orderFillRequests)) {
return; // no-op
}
const orderAddressesValuesAmountsAndSignatureArray = _.map(orderFillRequests, orderFillRequest => {
return [
...ExchangeWrapper._getOrderAddressesAndValues(orderFillRequest.signedOrder),
orderFillRequest.takerTokenFillAmount,
orderFillRequest.signedOrder.ecSignature.v,
orderFillRequest.signedOrder.ecSignature.r,
orderFillRequest.signedOrder.ecSignature.s,
];
});
// We use _.unzip<any> because _.unzip doesn't type check if values have different types :'(
const [orderAddressesArray, orderValuesArray, fillTakerTokenAmounts, vArray, rArray, sArray] = _.unzip<any>(
orderAddressesValuesAmountsAndSignatureArray,
);
const exchangeInstance = await this._getExchangeContractAsync();
const gas = await exchangeInstance.batchFillOrders.estimateGas(
orderAddressesArray,
orderValuesArray,
fillTakerTokenAmounts,
shouldThrowOnInsufficientBalanceOrAllowance,
vArray,
rArray,
sArray,
{
from: takerAddress,
},
);
const response: ContractResponse = await exchangeInstance.batchFillOrders(
orderAddressesArray,
orderValuesArray,
fillTakerTokenAmounts,
shouldThrowOnInsufficientBalanceOrAllowance,
vArray,
rArray,
sArray,
{
from: takerAddress,
gas,
},
);
this._throwErrorLogsAsErrors(response.logs);
}
/**
* Attempts to fill a specific amount of an order. If the entire amount specified cannot be filled,
* the fill order is abandoned.
* @param signedOrder An object that conforms to the SignedOrder interface. The
* signedOrder you wish to fill.
* @param fillTakerTokenAmount The total amount of the takerTokens you would like to fill.
* @param takerAddress The user Ethereum address who would like to fill this order.
* Must be available via the supplied Web3.Provider passed to 0x.js.
*/
@decorators.contractCallErrorHandler
public async fillOrKillOrderAsync(signedOrder: SignedOrder, fillTakerTokenAmount: BigNumber.BigNumber,
takerAddress: string): Promise<void> {
assert.doesConformToSchema('signedOrder', signedOrder, signedOrderSchema);
assert.isBigNumber('fillTakerTokenAmount', fillTakerTokenAmount);
await assert.isSenderAddressAsync('takerAddress', takerAddress, this._web3Wrapper);
const exchangeInstance = await this._getExchangeContractAsync();
await this._validateFillOrderAndThrowIfInvalidAsync(signedOrder, fillTakerTokenAmount, takerAddress);
await this._validateFillOrKillOrderAndThrowIfInvalidAsync(signedOrder, fillTakerTokenAmount);
const [orderAddresses, orderValues] = ExchangeWrapper._getOrderAddressesAndValues(signedOrder);
const gas = await exchangeInstance.fillOrKillOrder.estimateGas(
orderAddresses,
orderValues,
fillTakerTokenAmount,
signedOrder.ecSignature.v,
signedOrder.ecSignature.r,
signedOrder.ecSignature.s,
{
from: takerAddress,
},
);
const response: ContractResponse = await exchangeInstance.fillOrKillOrder(
orderAddresses,
orderValues,
fillTakerTokenAmount,
signedOrder.ecSignature.v,
signedOrder.ecSignature.r,
signedOrder.ecSignature.s,
{
from: takerAddress,
gas,
},
);
this._throwErrorLogsAsErrors(response.logs);
}
/**
* Batch version of fillOrKill. Allows a taker to specify a batch of orders that will either be atomically
* filled (each to the specified fillAmount) or aborted.
* @param orderFillOrKillRequests An array of objects that conform to the OrderFillOrKillRequest interface.
* @param takerAddress The user Ethereum address who would like to fill there orders.
* Must be available via the supplied Web3.Provider passed to 0x.js.
*/
@decorators.contractCallErrorHandler
public async batchFillOrKillAsync(orderFillOrKillRequests: OrderFillOrKillRequest[],
takerAddress: string): Promise<void> {
assert.doesConformToSchema('orderFillOrKillRequests', orderFillOrKillRequests, orderFillOrKillRequestsSchema);
const exchangeContractAddresses = _.map(
orderFillOrKillRequests,
orderFillOrKillRequest => orderFillOrKillRequest.signedOrder.exchangeContractAddress,
);
assert.hasAtMostOneUniqueValue(exchangeContractAddresses,
ExchangeContractErrs.BatchOrdersMustHaveSameExchangeAddress);
await assert.isSenderAddressAsync('takerAddress', takerAddress, this._web3Wrapper);
if (_.isEmpty(orderFillOrKillRequests)) {
return; // no-op
}
const exchangeInstance = await this._getExchangeContractAsync();
for (const request of orderFillOrKillRequests) {
await this._validateFillOrKillOrderAndThrowIfInvalidAsync(request.signedOrder, request.fillTakerAmount);
}
const orderAddressesValuesAndTakerTokenFillAmounts = _.map(orderFillOrKillRequests, request => {
return [
...ExchangeWrapper._getOrderAddressesAndValues(request.signedOrder),
request.fillTakerAmount,
request.signedOrder.ecSignature.v,
request.signedOrder.ecSignature.r,
request.signedOrder.ecSignature.s,
];
});
// We use _.unzip<any> because _.unzip doesn't type check if values have different types :'(
const [orderAddresses, orderValues, fillTakerTokenAmounts, vParams, rParams, sParams] =
_.unzip<any>(orderAddressesValuesAndTakerTokenFillAmounts);
const gas = await exchangeInstance.batchFillOrKillOrders.estimateGas(
orderAddresses,
orderValues,
fillTakerTokenAmounts,
vParams,
rParams,
sParams,
{
from: takerAddress,
},
);
const response: ContractResponse = await exchangeInstance.batchFillOrKillOrders(
orderAddresses,
orderValues,
fillTakerTokenAmounts,
vParams,
rParams,
sParams,
{
from: takerAddress,
gas,
},
);
this._throwErrorLogsAsErrors(response.logs);
}
/**
* Cancel a given fill amount of an order. Cancellations are cumulative.
* @param order An object that conforms to the Order or SignedOrder interface.
* The order you would like to cancel.
* @param cancelTakerTokenAmount The amount (specified in taker tokens) that you would like to cancel.
* @return The amount of the order that was cancelled (in taker token baseUnits).
*/
@decorators.contractCallErrorHandler
public async cancelOrderAsync(
order: Order|SignedOrder, cancelTakerTokenAmount: BigNumber.BigNumber): Promise<BigNumber.BigNumber> {
assert.doesConformToSchema('order', order, orderSchema);
assert.isBigNumber('takerTokenCancelAmount', cancelTakerTokenAmount);
await assert.isSenderAddressAsync('order.maker', order.maker, this._web3Wrapper);
const exchangeInstance = await this._getExchangeContractAsync();
await this._validateCancelOrderAndThrowIfInvalidAsync(order, cancelTakerTokenAmount);
const [orderAddresses, orderValues] = ExchangeWrapper._getOrderAddressesAndValues(order);
const gas = await exchangeInstance.cancelOrder.estimateGas(
orderAddresses,
orderValues,
cancelTakerTokenAmount,
{
from: order.maker,
},
);
const response: ContractResponse = await exchangeInstance.cancelOrder(
orderAddresses,
orderValues,
cancelTakerTokenAmount,
{
from: order.maker,
gas,
},
);
this._throwErrorLogsAsErrors(response.logs);
const logFillArgs = response.logs[0].args as LogCancelContractEventArgs;
const cancelledTakerTokenAmount = new BigNumber(logFillArgs.cancelledTakerTokenAmount);
return cancelledTakerTokenAmount;
}
/**
* Batch version of cancelOrderAsync. Atomically cancels multiple orders in a single transaction.
* All orders must be from the same maker.
* @param orderCancellationRequests An array of objects that conform to the OrderCancellationRequest
* interface.
*/
@decorators.contractCallErrorHandler
public async batchCancelOrdersAsync(orderCancellationRequests: OrderCancellationRequest[]): Promise<void> {
assert.doesConformToSchema('orderCancellationRequests', orderCancellationRequests,
orderCancellationRequestsSchema);
const exchangeContractAddresses = _.map(
orderCancellationRequests,
orderCancellationRequest => orderCancellationRequest.order.exchangeContractAddress,
);
assert.hasAtMostOneUniqueValue(exchangeContractAddresses,
ExchangeContractErrs.BatchOrdersMustHaveSameExchangeAddress);
const makers = _.map(orderCancellationRequests, cancellationRequest => cancellationRequest.order.maker);
assert.hasAtMostOneUniqueValue(makers, ExchangeContractErrs.MultipleMakersInSingleCancelBatchDisallowed);
const maker = makers[0];
await assert.isSenderAddressAsync('maker', maker, this._web3Wrapper);
for (const cancellationRequest of orderCancellationRequests) {
await this._validateCancelOrderAndThrowIfInvalidAsync(
cancellationRequest.order, cancellationRequest.takerTokenCancelAmount,
);
}
if (_.isEmpty(orderCancellationRequests)) {
return; // no-op
}
const exchangeInstance = await this._getExchangeContractAsync();
const orderAddressesValuesAndTakerTokenCancelAmounts = _.map(orderCancellationRequests, cancellationRequest => {
return [
...ExchangeWrapper._getOrderAddressesAndValues(cancellationRequest.order),
cancellationRequest.takerTokenCancelAmount,
];
});
// We use _.unzip<any> because _.unzip doesn't type check if values have different types :'(
const [orderAddresses, orderValues, cancelTakerTokenAmounts] =
_.unzip<any>(orderAddressesValuesAndTakerTokenCancelAmounts);
const gas = await exchangeInstance.batchCancelOrders.estimateGas(
orderAddresses,
orderValues,
cancelTakerTokenAmounts,
{
from: maker,
},
);
const response: ContractResponse = await exchangeInstance.batchCancelOrders(
orderAddresses,
orderValues,
cancelTakerTokenAmounts,
{
from: maker,
gas,
},
);
this._throwErrorLogsAsErrors(response.logs);
}
/**
* Subscribe to an event type emitted by the Exchange smart contract
* @param eventName The exchange contract event you would like to subscribe to.
* @param subscriptionOpts Subscriptions options that let you configure the subscription.
* @param indexFilterValues An object where the keys are indexed args returned by the event and
* the value is the value you are interested in. E.g `{maker: aUserAddressHex}`
* @param exchangeContractAddress The hex encoded address of the Exchange contract to call.
* @return ContractEventEmitter object
*/
public async subscribeAsync(eventName: ExchangeEvents, subscriptionOpts: SubscriptionOpts,
indexFilterValues: IndexedFilterValues, exchangeContractAddress: string):
Promise<ContractEventEmitter> {
assert.isETHAddressHex('exchangeContractAddress', exchangeContractAddress);
assert.doesBelongToStringEnum('eventName', eventName, ExchangeEvents);
assert.doesConformToSchema('subscriptionOpts', subscriptionOpts, subscriptionOptsSchema);
assert.doesConformToSchema('indexFilterValues', indexFilterValues, indexFilterValuesSchema);
const exchangeContract = await this._getExchangeContractAsync();
let createLogEvent: CreateContractEvent;
switch (eventName) {
case ExchangeEvents.LogFill:
createLogEvent = exchangeContract.LogFill;
break;
case ExchangeEvents.LogError:
createLogEvent = exchangeContract.LogError;
break;
case ExchangeEvents.LogCancel:
createLogEvent = exchangeContract.LogCancel;
break;
default:
throw utils.spawnSwitchErr('ExchangeEvents', eventName);
}
const logEventObj: ContractEventObj = createLogEvent(indexFilterValues, subscriptionOpts);
const eventEmitter = eventUtils.wrapEventEmitter(logEventObj);
this._exchangeLogEventEmitters.push(eventEmitter);
return eventEmitter;
}
/**
* Stops watching for all exchange events
*/
public async stopWatchingAllEventsAsync(): Promise<void> {
const stopWatchingPromises = _.map(this._exchangeLogEventEmitters,
logEventObj => logEventObj.stopWatchingAsync());
await Promise.all(stopWatchingPromises);
this._exchangeLogEventEmitters = [];
}
/**
* Retrieves the Ethereum address of the Exchange contract deployed on the network
* that the user-passed web3 provider is connected to.
* @returns The Ethereum address of the Exchange contract being used.
*/
public async getContractAddressAsync(): Promise<string> {
const exchangeInstance = await this._getExchangeContractAsync();
return exchangeInstance.address;
}
private async _invalidateContractInstancesAsync(): Promise<void> {
await this.stopWatchingAllEventsAsync();
delete this._exchangeContractIfExists;
}
private async _isValidSignatureUsingContractCallAsync(dataHex: string, ecSignature: ECSignature,
signerAddressHex: string): Promise<boolean> {
assert.isHexString('dataHex', dataHex);
assert.doesConformToSchema('ecSignature', ecSignature, ecSignatureSchema);
assert.isETHAddressHex('signerAddressHex', signerAddressHex);
const exchangeInstance = await this._getExchangeContractAsync();
const isValidSignature = await exchangeInstance.isValidSignature.call(
signerAddressHex,
dataHex,
ecSignature.v,
ecSignature.r,
ecSignature.s,
);
return isValidSignature;
}
private async _getOrderHashHexUsingContractCallAsync(order: Order|SignedOrder): Promise<string> {
const exchangeInstance = await this._getExchangeContractAsync();
const [orderAddresses, orderValues] = ExchangeWrapper._getOrderAddressesAndValues(order);
const orderHashHex = await exchangeInstance.getOrderHash.call(orderAddresses, orderValues);
return orderHashHex;
}
private async _validateFillOrderAndThrowIfInvalidAsync(signedOrder: SignedOrder,
fillTakerAmount: BigNumber.BigNumber,
senderAddress: string): Promise<void> {
if (fillTakerAmount.eq(0)) {
throw new Error(ExchangeContractErrs.OrderRemainingFillAmountZero);
}
if (signedOrder.taker !== constants.NULL_ADDRESS && signedOrder.taker !== senderAddress) {
throw new Error(ExchangeContractErrs.TransactionSenderIsNotFillOrderTaker);
}
const currentUnixTimestampSec = utils.getCurrentUnixTimestamp();
if (signedOrder.expirationUnixTimestampSec.lessThan(currentUnixTimestampSec)) {
throw new Error(ExchangeContractErrs.OrderFillExpired);
}
const zrxTokenAddress = await this._getZRXTokenAddressAsync(signedOrder.exchangeContractAddress);
await this._orderValidationUtils.validateFillOrderBalancesAllowancesThrowIfInvalidAsync(
signedOrder, fillTakerAmount, senderAddress, zrxTokenAddress,
);
const wouldRoundingErrorOccur = await this._isRoundingErrorAsync(
fillTakerAmount, signedOrder.takerTokenAmount, signedOrder.makerTokenAmount,
);
if (wouldRoundingErrorOccur) {
throw new Error(ExchangeContractErrs.OrderFillRoundingError);
}
}
private async _validateCancelOrderAndThrowIfInvalidAsync(
order: Order, takerTokenCancelAmount: BigNumber.BigNumber): Promise<void> {
if (takerTokenCancelAmount.eq(0)) {
throw new Error(ExchangeContractErrs.OrderCancelAmountZero);
}
const orderHash = utils.getOrderHashHex(order);
const unavailableAmount = await this.getUnavailableTakerAmountAsync(orderHash);
if (order.takerTokenAmount.minus(unavailableAmount).eq(0)) {
throw new Error(ExchangeContractErrs.OrderAlreadyCancelledOrFilled);
}
const currentUnixTimestampSec = utils.getCurrentUnixTimestamp();
if (order.expirationUnixTimestampSec.lessThan(currentUnixTimestampSec)) {
throw new Error(ExchangeContractErrs.OrderCancelExpired);
}
}
private async _validateFillOrKillOrderAndThrowIfInvalidAsync(signedOrder: SignedOrder,
fillTakerAmount: BigNumber.BigNumber) {
// Check that fillValue available >= fillTakerAmount
const orderHashHex = utils.getOrderHashHex(signedOrder);
const unavailableTakerAmount = await this.getUnavailableTakerAmountAsync(orderHashHex);
const remainingTakerAmount = signedOrder.takerTokenAmount.minus(unavailableTakerAmount);
if (remainingTakerAmount < fillTakerAmount) {
throw new Error(ExchangeContractErrs.InsufficientRemainingFillAmount);
}
}
private _throwErrorLogsAsErrors(logs: ContractEvent[]): void {
const errEvent = _.find(logs, {event: 'LogError'});
if (!_.isUndefined(errEvent)) {
const errCode = (errEvent.args as LogErrorContractEventArgs).errorId.toNumber();
const errMessage = this._exchangeContractErrCodesToMsg[errCode];
throw new Error(errMessage);
}
}
private async _isRoundingErrorAsync(numerator: BigNumber.BigNumber,
demoninator: BigNumber.BigNumber,
makerTokenAmount: BigNumber.BigNumber): Promise<boolean> {
const exchangeInstance = await this._getExchangeContractAsync();
const isRoundingError = await exchangeInstance.isRoundingError.call(
numerator, demoninator, makerTokenAmount,
);
return isRoundingError;
}
private async _getExchangeContractAsync(): Promise<ExchangeContract> {
if (!_.isUndefined(this._exchangeContractIfExists)) {
return this._exchangeContractIfExists;
}
const contractInstance = await this._instantiateContractIfExistsAsync((ExchangeArtifacts as any));
this._exchangeContractIfExists = contractInstance as ExchangeContract;
return this._exchangeContractIfExists;
}
private async _getZRXTokenAddressAsync(exchangeContractAddress: string): Promise<string> {
const exchangeInstance = await this._getExchangeContractAsync();
const ZRXtokenAddress = await exchangeInstance.ZRX_TOKEN_CONTRACT.call();
return ZRXtokenAddress;
}
}
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