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import { assetProxyUtils, orderFactory } from '@0xproject/order-utils';
import { OrderWithoutExchangeAddress, SignedOrder } from '@0xproject/types';
import { BigNumber } from '@0xproject/utils';
import { Web3Wrapper } from '@0xproject/web3-wrapper';
import { Provider } from 'ethereum-types';
import * as _ from 'lodash';
import { artifacts } from './artifacts';
import { constants } from './constants';
import { ERC20TokenContract } from './generated_contract_wrappers/erc20_token';
import { ExchangeContract } from './generated_contract_wrappers/exchange';
export class FillScenarios {
private readonly _web3Wrapper: Web3Wrapper;
private readonly _userAddresses: string[];
private readonly _coinbase: string;
private readonly _zrxTokenAddress: string;
private readonly _exchangeAddress: string;
private readonly _erc20ProxyAddress: string;
constructor(
provider: Provider,
userAddresses: string[],
zrxTokenAddress: string,
exchangeAddress: string,
erc20ProxyAddress: string,
) {
this._web3Wrapper = new Web3Wrapper(provider);
this._userAddresses = userAddresses;
this._coinbase = userAddresses[0];
this._zrxTokenAddress = zrxTokenAddress;
this._exchangeAddress = exchangeAddress;
this._erc20ProxyAddress = erc20ProxyAddress;
}
public async createFillableSignedOrderAsync(
makerAssetData: string,
takerAssetData: string,
makerAddress: string,
takerAddress: string,
fillableAmount: BigNumber,
expirationTimeSeconds?: BigNumber,
): Promise<SignedOrder> {
return this.createAsymmetricFillableSignedOrderAsync(
makerAssetData,
takerAssetData,
makerAddress,
takerAddress,
fillableAmount,
fillableAmount,
expirationTimeSeconds,
);
}
public async createFillableSignedOrderWithFeesAsync(
makerAssetData: string,
takerAssetData: string,
makerFee: BigNumber,
takerFee: BigNumber,
makerAddress: string,
takerAddress: string,
fillableAmount: BigNumber,
feeRecepientAddress: string,
expirationTimeSeconds?: BigNumber,
): Promise<SignedOrder> {
return this._createAsymmetricFillableSignedOrderWithFeesAsync(
makerAssetData,
takerAssetData,
makerFee,
takerFee,
makerAddress,
takerAddress,
fillableAmount,
fillableAmount,
feeRecepientAddress,
expirationTimeSeconds,
);
}
public async createAsymmetricFillableSignedOrderAsync(
makerAssetData: string,
takerAssetData: string,
makerAddress: string,
takerAddress: string,
makerFillableAmount: BigNumber,
takerFillableAmount: BigNumber,
expirationTimeSeconds?: BigNumber,
): Promise<SignedOrder> {
const makerFee = new BigNumber(0);
const takerFee = new BigNumber(0);
const feeRecepientAddress = constants.NULL_ADDRESS;
return this._createAsymmetricFillableSignedOrderWithFeesAsync(
makerAssetData,
takerAssetData,
makerFee,
takerFee,
makerAddress,
takerAddress,
makerFillableAmount,
takerFillableAmount,
feeRecepientAddress,
expirationTimeSeconds,
);
}
public async createPartiallyFilledSignedOrderAsync(
makerAssetData: string,
takerAssetData: string,
takerAddress: string,
fillableAmount: BigNumber,
partialFillAmount: BigNumber,
): Promise<SignedOrder> {
const [makerAddress] = this._userAddresses;
const signedOrder = await this.createAsymmetricFillableSignedOrderAsync(
makerAssetData,
takerAssetData,
makerAddress,
takerAddress,
fillableAmount,
fillableAmount,
);
const exchangeInstance = new ExchangeContract(
artifacts.Exchange.compilerOutput.abi,
signedOrder.exchangeAddress,
this._web3Wrapper.getProvider(),
this._web3Wrapper.getContractDefaults(),
);
const orderWithoutExchangeAddress = _.omit(signedOrder, [
'signature',
'exchangeAddress',
]) as OrderWithoutExchangeAddress;
await exchangeInstance.fillOrder.sendTransactionAsync(
orderWithoutExchangeAddress,
partialFillAmount,
signedOrder.signature,
{ from: takerAddress },
);
return signedOrder;
}
private async _createAsymmetricFillableSignedOrderWithFeesAsync(
makerAssetData: string,
takerAssetData: string,
makerFee: BigNumber,
takerFee: BigNumber,
makerAddress: string,
takerAddress: string,
makerFillableAmount: BigNumber,
takerFillableAmount: BigNumber,
feeRecepientAddress: string,
expirationTimeSeconds?: BigNumber,
): Promise<SignedOrder> {
const makerERC20AssetData = assetProxyUtils.decodeERC20AssetData(makerAssetData);
const makerTokenAddress = makerERC20AssetData.tokenAddress;
const takerERC20AssetData = assetProxyUtils.decodeERC20AssetData(takerAssetData);
const takerTokenAddress = takerERC20AssetData.tokenAddress;
await Promise.all([
this._increaseERC20BalanceAndAllowanceAsync(makerTokenAddress, makerAddress, makerFillableAmount),
this._increaseERC20BalanceAndAllowanceAsync(takerTokenAddress, takerAddress, takerFillableAmount),
]);
await Promise.all([
this._increaseERC20BalanceAndAllowanceAsync(this._zrxTokenAddress, makerAddress, makerFee),
this._increaseERC20BalanceAndAllowanceAsync(this._zrxTokenAddress, takerAddress, takerFee),
]);
const senderAddress = constants.NULL_ADDRESS;
const signedOrder = await orderFactory.createSignedOrderAsync(
this._web3Wrapper.getProvider(),
makerAddress,
takerAddress,
senderAddress,
makerFee,
takerFee,
makerFillableAmount,
makerAssetData,
takerFillableAmount,
takerAssetData,
this._exchangeAddress,
feeRecepientAddress,
expirationTimeSeconds,
);
return signedOrder;
}
private async _increaseERC20BalanceAndAllowanceAsync(
tokenAddress: string,
address: string,
amount: BigNumber,
): Promise<void> {
if (amount.isZero() || address === constants.NULL_ADDRESS) {
return; // noop
}
await Promise.all([
this._increaseERC20BalanceAsync(tokenAddress, address, amount),
this._increaseERC20AllowanceAsync(tokenAddress, address, amount),
]);
}
private async _increaseERC20BalanceAsync(tokenAddress: string, address: string, amount: BigNumber): Promise<void> {
const token = new ERC20TokenContract(
artifacts.ERC20Token.compilerOutput.abi,
tokenAddress,
this._web3Wrapper.getProvider(),
this._web3Wrapper.getContractDefaults(),
);
await token.transfer.sendTransactionAsync(address, amount, {
from: this._coinbase,
});
}
private async _increaseERC20AllowanceAsync(
tokenAddress: string,
address: string,
amount: BigNumber,
): Promise<void> {
const tokenInstance = new ERC20TokenContract(
artifacts.ERC20Token.compilerOutput.abi,
tokenAddress,
this._web3Wrapper.getProvider(),
this._web3Wrapper.getContractDefaults(),
);
const oldMakerAllowance = await tokenInstance.allowance.callAsync(address, this._erc20ProxyAddress);
const newMakerAllowance = oldMakerAllowance.plus(amount);
await tokenInstance.approve.sendTransactionAsync(this._erc20ProxyAddress, newMakerAllowance, {
from: address,
});
}
}
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