aboutsummaryrefslogtreecommitdiffstats
path: root/packages/contract-wrappers/src/contract_wrappers/forwarder_wrapper.ts
blob: 5497f92b57ebfc26e7e9fccc514bf03de43ce86e (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
import { ForwarderContract } from '@0x/abi-gen-wrappers';
import { Forwarder } from '@0x/contract-artifacts';
import { schemas } from '@0x/json-schemas';
import { SignedOrder } from '@0x/types';
import { BigNumber } from '@0x/utils';
import { Web3Wrapper } from '@0x/web3-wrapper';
import { ContractAbi } from 'ethereum-types';
import * as _ from 'lodash';

import { orderTxOptsSchema } from '../schemas/order_tx_opts_schema';
import { txOptsSchema } from '../schemas/tx_opts_schema';
import { OrderTransactionOpts } from '../types';
import { assert } from '../utils/assert';
import { calldataOptimizationUtils } from '../utils/calldata_optimization_utils';
import { constants } from '../utils/constants';
import { _getDefaultContractAddresses } from '../utils/contract_addresses';
import { decorators } from '../utils/decorators';
import { utils } from '../utils/utils';

import { ContractWrapper } from './contract_wrapper';

/**
 * This class includes the functionality related to interacting with the Forwarder contract.
 */
export class ForwarderWrapper extends ContractWrapper {
    public abi: ContractAbi = Forwarder.compilerOutput.abi;
    public address: string;
    public zrxTokenAddress: string;
    public etherTokenAddress: string;
    private _forwarderContractIfExists?: ForwarderContract;

    /**
     * Instantiate ForwarderWrapper
     * @param web3Wrapper Web3Wrapper instance to use.
     * @param networkId Desired networkId.
     * @param address The address of the Exchange contract. If undefined, will
     * default to the known address corresponding to the networkId.
     * @param zrxTokenAddress The address of the ZRXToken contract. If
     * undefined, will default to the known address corresponding to the
     * networkId.
     * @param etherTokenAddress The address of a WETH (Ether token) contract. If
     * undefined, will default to the known address corresponding to the
     * networkId.
     */
    constructor(
        web3Wrapper: Web3Wrapper,
        networkId: number,
        address?: string,
        zrxTokenAddress?: string,
        etherTokenAddress?: string,
    ) {
        super(web3Wrapper, networkId);
        this.address = _.isUndefined(address) ? _getDefaultContractAddresses(networkId).exchange : address;
        this.zrxTokenAddress = _.isUndefined(zrxTokenAddress)
            ? _getDefaultContractAddresses(networkId).zrxToken
            : zrxTokenAddress;
        this.etherTokenAddress = _.isUndefined(etherTokenAddress)
            ? _getDefaultContractAddresses(networkId).etherToken
            : etherTokenAddress;
    }
    /**
     * Purchases as much of orders' makerAssets as possible by selling up to 95% of transaction's ETH value.
     * Any ZRX required to pay fees for primary orders will automatically be purchased by this contract.
     * 5% of ETH value is reserved for paying fees to order feeRecipients (in ZRX) and forwarding contract feeRecipient (in ETH).
     * Any ETH not spent will be refunded to sender.
     * @param   signedOrders            An array of objects that conform to the SignedOrder interface. All orders must specify the same makerAsset.
     *                                  All orders must specify WETH as the takerAsset
     * @param   takerAddress            The user Ethereum address who would like to fill this order. Must be available via the supplied
     *                                  Provider provided at instantiation.
     * @param   ethAmount               The amount of eth to send with the transaction (in wei).
     * @param   signedFeeOrders         An array of objects that conform to the SignedOrder interface. All orders must specify ZRX as makerAsset and WETH as takerAsset.
     *                                  Used to purchase ZRX for primary order fees.
     * @param   feePercentage           The percentage of WETH sold that will payed as fee to forwarding contract feeRecipient.
     *                                  Defaults to 0.
     * @param   feeRecipientAddress     The address that will receive ETH when signedFeeOrders are filled.
     * @param   orderTransactionOpts    Transaction parameters.
     * @return  Transaction hash.
     */
    @decorators.asyncZeroExErrorHandler
    public async marketSellOrdersWithEthAsync(
        signedOrders: SignedOrder[],
        takerAddress: string,
        ethAmount: BigNumber,
        signedFeeOrders: SignedOrder[] = [],
        feePercentage: number = 0,
        feeRecipientAddress: string = constants.NULL_ADDRESS,
        orderTransactionOpts: OrderTransactionOpts = { shouldValidate: true },
    ): Promise<string> {
        // type assertions
        assert.doesConformToSchema('signedOrders', signedOrders, schemas.signedOrdersSchema);
        await assert.isSenderAddressAsync('takerAddress', takerAddress, this._web3Wrapper);
        assert.isBigNumber('ethAmount', ethAmount);
        assert.doesConformToSchema('signedFeeOrders', signedFeeOrders, schemas.signedOrdersSchema);
        assert.isNumber('feePercentage', feePercentage);
        assert.isETHAddressHex('feeRecipientAddress', feeRecipientAddress);
        assert.doesConformToSchema('orderTransactionOpts', orderTransactionOpts, orderTxOptsSchema, [txOptsSchema]);
        // other assertions
        assert.ordersCanBeUsedForForwarderContract(signedOrders, this.etherTokenAddress);
        assert.feeOrdersCanBeUsedForForwarderContract(signedFeeOrders, this.zrxTokenAddress, this.etherTokenAddress);
        // format feePercentage
        const formattedFeePercentage = utils.numberPercentageToEtherTokenAmountPercentage(feePercentage);
        // lowercase input addresses
        const normalizedTakerAddress = takerAddress.toLowerCase();
        const normalizedFeeRecipientAddress = feeRecipientAddress.toLowerCase();
        // optimize orders
        const optimizedMarketOrders = calldataOptimizationUtils.optimizeForwarderOrders(signedOrders);
        const optimizedFeeOrders = calldataOptimizationUtils.optimizeForwarderFeeOrders(signedFeeOrders);
        // compile signatures
        const signatures = _.map(optimizedMarketOrders, order => order.signature);
        const feeSignatures = _.map(optimizedFeeOrders, order => order.signature);
        // get contract
        const forwarderContractInstance = await this._getForwarderContractAsync();
        // validate transaction
        if (orderTransactionOpts.shouldValidate) {
            await forwarderContractInstance.marketSellOrdersWithEth.callAsync(
                optimizedMarketOrders,
                signatures,
                optimizedFeeOrders,
                feeSignatures,
                formattedFeePercentage,
                normalizedFeeRecipientAddress,
                {
                    value: ethAmount,
                    from: normalizedTakerAddress,
                    gas: orderTransactionOpts.gasLimit,
                    gasPrice: orderTransactionOpts.gasPrice,
                    nonce: orderTransactionOpts.nonce,
                },
            );
        }
        // send transaction
        const txHash = await forwarderContractInstance.marketSellOrdersWithEth.sendTransactionAsync(
            optimizedMarketOrders,
            signatures,
            optimizedFeeOrders,
            feeSignatures,
            formattedFeePercentage,
            feeRecipientAddress,
            {
                value: ethAmount,
                from: normalizedTakerAddress,
                gas: orderTransactionOpts.gasLimit,
                gasPrice: orderTransactionOpts.gasPrice,
                nonce: orderTransactionOpts.nonce,
            },
        );
        return txHash;
    }
    /**
     * Attempt to purchase makerAssetFillAmount of makerAsset by selling ethAmount provided with transaction.
     * Any ZRX required to pay fees for primary orders will automatically be purchased by the contract.
     * Any ETH not spent will be refunded to sender.
     * @param   signedOrders            An array of objects that conform to the SignedOrder interface. All orders must specify the same makerAsset.
     *                                  All orders must specify WETH as the takerAsset
     * @param   makerAssetFillAmount    The amount of the order (in taker asset baseUnits) that you wish to fill.
     * @param   takerAddress            The user Ethereum address who would like to fill this order. Must be available via the supplied
     *                                  Provider provided at instantiation.
     * @param   ethAmount               The amount of eth to send with the transaction (in wei).
     * @param   signedFeeOrders         An array of objects that conform to the SignedOrder interface. All orders must specify ZRX as makerAsset and WETH as takerAsset.
     *                                  Used to purchase ZRX for primary order fees.
     * @param   feePercentage           The percentage of WETH sold that will payed as fee to forwarding contract feeRecipient.
     *                                  Defaults to 0.
     * @param   feeRecipientAddress     The address that will receive ETH when signedFeeOrders are filled.
     * @param   orderTransactionOpts    Transaction parameters.
     * @return  Transaction hash.
     */
    @decorators.asyncZeroExErrorHandler
    public async marketBuyOrdersWithEthAsync(
        signedOrders: SignedOrder[],
        makerAssetFillAmount: BigNumber,
        takerAddress: string,
        ethAmount: BigNumber,
        signedFeeOrders: SignedOrder[] = [],
        feePercentage: number = 0,
        feeRecipientAddress: string = constants.NULL_ADDRESS,
        orderTransactionOpts: OrderTransactionOpts = { shouldValidate: true },
    ): Promise<string> {
        // type assertions
        assert.doesConformToSchema('signedOrders', signedOrders, schemas.signedOrdersSchema);
        assert.isBigNumber('makerAssetFillAmount', makerAssetFillAmount);
        await assert.isSenderAddressAsync('takerAddress', takerAddress, this._web3Wrapper);
        assert.isBigNumber('ethAmount', ethAmount);
        assert.doesConformToSchema('signedFeeOrders', signedFeeOrders, schemas.signedOrdersSchema);
        assert.isNumber('feePercentage', feePercentage);
        assert.isETHAddressHex('feeRecipientAddress', feeRecipientAddress);
        assert.doesConformToSchema('orderTransactionOpts', orderTransactionOpts, orderTxOptsSchema, [txOptsSchema]);
        // other assertions
        assert.ordersCanBeUsedForForwarderContract(signedOrders, this.etherTokenAddress);
        assert.feeOrdersCanBeUsedForForwarderContract(signedFeeOrders, this.zrxTokenAddress, this.etherTokenAddress);
        // format feePercentage
        const formattedFeePercentage = utils.numberPercentageToEtherTokenAmountPercentage(feePercentage);
        // lowercase input addresses
        const normalizedTakerAddress = takerAddress.toLowerCase();
        const normalizedFeeRecipientAddress = feeRecipientAddress.toLowerCase();
        // optimize orders
        const optimizedMarketOrders = calldataOptimizationUtils.optimizeForwarderOrders(signedOrders);
        const optimizedFeeOrders = calldataOptimizationUtils.optimizeForwarderFeeOrders(signedFeeOrders);
        // compile signatures
        const signatures = _.map(optimizedMarketOrders, order => order.signature);
        const feeSignatures = _.map(optimizedFeeOrders, order => order.signature);
        // get contract
        const forwarderContractInstance = await this._getForwarderContractAsync();
        // validate transaction
        if (orderTransactionOpts.shouldValidate) {
            await forwarderContractInstance.marketBuyOrdersWithEth.callAsync(
                optimizedMarketOrders,
                makerAssetFillAmount,
                signatures,
                optimizedFeeOrders,
                feeSignatures,
                formattedFeePercentage,
                normalizedFeeRecipientAddress,
                {
                    value: ethAmount,
                    from: normalizedTakerAddress,
                    gas: orderTransactionOpts.gasLimit,
                    gasPrice: orderTransactionOpts.gasPrice,
                    nonce: orderTransactionOpts.nonce,
                },
            );
        }
        // send transaction
        const txHash = await forwarderContractInstance.marketBuyOrdersWithEth.sendTransactionAsync(
            optimizedMarketOrders,
            makerAssetFillAmount,
            signatures,
            optimizedFeeOrders,
            feeSignatures,
            formattedFeePercentage,
            feeRecipientAddress,
            {
                value: ethAmount,
                from: normalizedTakerAddress,
                gas: orderTransactionOpts.gasLimit,
                gasPrice: orderTransactionOpts.gasPrice,
                nonce: orderTransactionOpts.nonce,
            },
        );
        return txHash;
    }
    private async _getForwarderContractAsync(): Promise<ForwarderContract> {
        if (!_.isUndefined(this._forwarderContractIfExists)) {
            return this._forwarderContractIfExists;
        }
        const contractInstance = new ForwarderContract(
            this.abi,
            this.address,
            this._web3Wrapper.getProvider(),
            this._web3Wrapper.getContractDefaults(),
        );
        this._forwarderContractIfExists = contractInstance;
        return this._forwarderContractIfExists;
    }
}