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import { SignedOrder } from '@0x/types';
import { BigNumber } from '@0x/utils';
import { Web3Wrapper } from '@0x/web3-wrapper';
import { Provider, TransactionReceiptWithDecodedLogs, TxDataPayable } from 'ethereum-types';
import * as _ from 'lodash';
import { ForwarderContract } from '../../generated-wrappers/forwarder';
import { constants } from './constants';
import { formatters } from './formatters';
import { LogDecoder } from './log_decoder';
import { MarketSellOrders } from './types';
export class ForwarderWrapper {
private readonly _web3Wrapper: Web3Wrapper;
private readonly _forwarderContract: ForwarderContract;
private readonly _logDecoder: LogDecoder;
public static getPercentageOfValue(value: BigNumber, percentage: number): BigNumber {
const numerator = constants.PERCENTAGE_DENOMINATOR.times(percentage).dividedToIntegerBy(100);
const newValue = value.times(numerator).dividedToIntegerBy(constants.PERCENTAGE_DENOMINATOR);
return newValue;
}
public static getWethForFeeOrders(feeAmount: BigNumber, feeOrders: SignedOrder[]): BigNumber {
let wethAmount = new BigNumber(0);
let remainingFeeAmount = feeAmount;
_.forEach(feeOrders, feeOrder => {
const feeAvailable = feeOrder.makerAssetAmount.minus(feeOrder.takerFee);
if (!remainingFeeAmount.isZero() && feeAvailable.gt(remainingFeeAmount)) {
wethAmount = wethAmount.plus(
feeOrder.takerAssetAmount
.times(remainingFeeAmount)
.dividedBy(feeAvailable)
.ceil(),
);
remainingFeeAmount = new BigNumber(0);
} else if (!remainingFeeAmount.isZero()) {
wethAmount = wethAmount.plus(feeOrder.takerAssetAmount);
remainingFeeAmount = remainingFeeAmount.minus(feeAvailable);
}
});
return wethAmount;
}
private static _createOptimizedOrders(signedOrders: SignedOrder[]): MarketSellOrders {
_.forEach(signedOrders, (signedOrder, index) => {
signedOrder.takerAssetData = constants.NULL_BYTES;
if (index > 0) {
signedOrder.makerAssetData = constants.NULL_BYTES;
}
});
const params = formatters.createMarketSellOrders(signedOrders, constants.ZERO_AMOUNT);
return params;
}
private static _createOptimizedZrxOrders(signedOrders: SignedOrder[]): MarketSellOrders {
_.forEach(signedOrders, signedOrder => {
signedOrder.makerAssetData = constants.NULL_BYTES;
signedOrder.takerAssetData = constants.NULL_BYTES;
});
const params = formatters.createMarketSellOrders(signedOrders, constants.ZERO_AMOUNT);
return params;
}
constructor(contractInstance: ForwarderContract, provider: Provider) {
this._forwarderContract = contractInstance;
this._web3Wrapper = new Web3Wrapper(provider);
this._logDecoder = new LogDecoder(this._web3Wrapper);
}
public async marketSellOrdersWithEthAsync(
orders: SignedOrder[],
feeOrders: SignedOrder[],
txData: TxDataPayable,
opts: { feePercentage?: BigNumber; feeRecipient?: string } = {},
): Promise<TransactionReceiptWithDecodedLogs> {
const params = ForwarderWrapper._createOptimizedOrders(orders);
const feeParams = ForwarderWrapper._createOptimizedZrxOrders(feeOrders);
const feePercentage = _.isUndefined(opts.feePercentage) ? constants.ZERO_AMOUNT : opts.feePercentage;
const feeRecipient = _.isUndefined(opts.feeRecipient) ? constants.NULL_ADDRESS : opts.feeRecipient;
const txHash = await this._forwarderContract.marketSellOrdersWithEth.sendTransactionAsync(
params.orders,
params.signatures,
feeParams.orders,
feeParams.signatures,
feePercentage,
feeRecipient,
txData,
);
const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
return tx;
}
public async marketBuyOrdersWithEthAsync(
orders: SignedOrder[],
feeOrders: SignedOrder[],
makerAssetFillAmount: BigNumber,
txData: TxDataPayable,
opts: { feePercentage?: BigNumber; feeRecipient?: string } = {},
): Promise<TransactionReceiptWithDecodedLogs> {
const params = ForwarderWrapper._createOptimizedOrders(orders);
const feeParams = ForwarderWrapper._createOptimizedZrxOrders(feeOrders);
const feePercentage = _.isUndefined(opts.feePercentage) ? constants.ZERO_AMOUNT : opts.feePercentage;
const feeRecipient = _.isUndefined(opts.feeRecipient) ? constants.NULL_ADDRESS : opts.feeRecipient;
const txHash = await this._forwarderContract.marketBuyOrdersWithEth.sendTransactionAsync(
params.orders,
makerAssetFillAmount,
params.signatures,
feeParams.orders,
feeParams.signatures,
feePercentage,
feeRecipient,
txData,
);
const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
return tx;
}
public async withdrawAssetAsync(
assetData: string,
amount: BigNumber,
txData: TxDataPayable,
): Promise<TransactionReceiptWithDecodedLogs> {
const txHash = await this._forwarderContract.withdrawAsset.sendTransactionAsync(assetData, amount, txData);
const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
return tx;
}
}
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