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import { formatters, orderFactory } from '@0xproject/order-utils';
import { Provider, SignedOrder, Token } from '@0xproject/types';
import { BigNumber } from '@0xproject/utils';
import { Web3Wrapper } from '@0xproject/web3-wrapper';
import * as _ from 'lodash';
import { artifacts } from './artifacts';
import { constants } from './constants';
import { DummyTokenContract } from './generated_contract_wrappers/dummy_token';
import { ExchangeContract } from './generated_contract_wrappers/exchange';
import { TokenContract } from './generated_contract_wrappers/token';
const INITIAL_COINBASE_TOKEN_SUPPLY_IN_UNITS = new BigNumber(100);
export class FillScenarios {
private _web3Wrapper: Web3Wrapper;
private _userAddresses: string[];
private _tokens: Token[];
private _coinbase: string;
private _zrxTokenAddress: string;
private _exchangeContractAddress: string;
constructor(
provider: Provider,
userAddresses: string[],
tokens: Token[],
zrxTokenAddress: string,
exchangeContractAddress: string,
) {
this._web3Wrapper = new Web3Wrapper(provider);
this._userAddresses = userAddresses;
this._tokens = tokens;
this._coinbase = userAddresses[0];
this._zrxTokenAddress = zrxTokenAddress;
this._exchangeContractAddress = exchangeContractAddress;
}
public async initTokenBalancesAsync(): Promise<void> {
for (const token of this._tokens) {
if (token.symbol !== 'ZRX' && token.symbol !== 'WETH') {
const dummyToken = new DummyTokenContract(
artifacts.DummyToken.abi,
token.address,
this._web3Wrapper.getProvider(),
this._web3Wrapper.getContractDefaults(),
);
const tokenSupply = Web3Wrapper.toBaseUnitAmount(
INITIAL_COINBASE_TOKEN_SUPPLY_IN_UNITS,
token.decimals,
);
const txHash = await dummyToken.setBalance.sendTransactionAsync(this._coinbase, tokenSupply, {
from: this._coinbase,
});
await this._web3Wrapper.awaitTransactionMinedAsync(txHash);
}
}
}
public async createFillableSignedOrderAsync(
makerTokenAddress: string,
takerTokenAddress: string,
makerAddress: string,
takerAddress: string,
fillableAmount: BigNumber,
expirationUnixTimestampSec?: BigNumber,
): Promise<SignedOrder> {
return this.createAsymmetricFillableSignedOrderAsync(
makerTokenAddress,
takerTokenAddress,
makerAddress,
takerAddress,
fillableAmount,
fillableAmount,
expirationUnixTimestampSec,
);
}
public async createFillableSignedOrderWithFeesAsync(
makerTokenAddress: string,
takerTokenAddress: string,
makerFee: BigNumber,
takerFee: BigNumber,
makerAddress: string,
takerAddress: string,
fillableAmount: BigNumber,
feeRecepient: string,
expirationUnixTimestampSec?: BigNumber,
): Promise<SignedOrder> {
return this._createAsymmetricFillableSignedOrderWithFeesAsync(
makerTokenAddress,
takerTokenAddress,
makerFee,
takerFee,
makerAddress,
takerAddress,
fillableAmount,
fillableAmount,
feeRecepient,
expirationUnixTimestampSec,
);
}
public async createAsymmetricFillableSignedOrderAsync(
makerTokenAddress: string,
takerTokenAddress: string,
makerAddress: string,
takerAddress: string,
makerFillableAmount: BigNumber,
takerFillableAmount: BigNumber,
expirationUnixTimestampSec?: BigNumber,
): Promise<SignedOrder> {
const makerFee = new BigNumber(0);
const takerFee = new BigNumber(0);
const feeRecepient = constants.NULL_ADDRESS;
return this._createAsymmetricFillableSignedOrderWithFeesAsync(
makerTokenAddress,
takerTokenAddress,
makerFee,
takerFee,
makerAddress,
takerAddress,
makerFillableAmount,
takerFillableAmount,
feeRecepient,
expirationUnixTimestampSec,
);
}
public async createPartiallyFilledSignedOrderAsync(
makerTokenAddress: string,
takerTokenAddress: string,
takerAddress: string,
fillableAmount: BigNumber,
partialFillAmount: BigNumber,
): Promise<SignedOrder> {
const [makerAddress] = this._userAddresses;
const signedOrder = await this.createAsymmetricFillableSignedOrderAsync(
makerTokenAddress,
takerTokenAddress,
makerAddress,
takerAddress,
fillableAmount,
fillableAmount,
);
const shouldThrowOnInsufficientBalanceOrAllowance = false;
const exchangeInstance = new ExchangeContract(
artifacts.Exchange.abi,
signedOrder.exchangeContractAddress,
this._web3Wrapper.getProvider(),
this._web3Wrapper.getContractDefaults(),
);
const [orderAddresses, orderValues] = formatters.getOrderAddressesAndValues(signedOrder);
await exchangeInstance.fillOrder.sendTransactionAsync(
orderAddresses,
orderValues,
partialFillAmount,
shouldThrowOnInsufficientBalanceOrAllowance,
signedOrder.ecSignature.v,
signedOrder.ecSignature.r,
signedOrder.ecSignature.s,
{ from: takerAddress },
);
return signedOrder;
}
private async _createAsymmetricFillableSignedOrderWithFeesAsync(
makerTokenAddress: string,
takerTokenAddress: string,
makerFee: BigNumber,
takerFee: BigNumber,
makerAddress: string,
takerAddress: string,
makerFillableAmount: BigNumber,
takerFillableAmount: BigNumber,
feeRecepient: string,
expirationUnixTimestampSec?: BigNumber,
): Promise<SignedOrder> {
await Promise.all([
this._increaseBalanceAndAllowanceAsync(makerTokenAddress, makerAddress, makerFillableAmount),
this._increaseBalanceAndAllowanceAsync(takerTokenAddress, takerAddress, takerFillableAmount),
]);
await Promise.all([
this._increaseBalanceAndAllowanceAsync(this._zrxTokenAddress, makerAddress, makerFee),
this._increaseBalanceAndAllowanceAsync(this._zrxTokenAddress, takerAddress, takerFee),
]);
const signedOrder = await orderFactory.createSignedOrderAsync(
this._web3Wrapper.getProvider(),
makerAddress,
takerAddress,
makerFee,
takerFee,
makerFillableAmount,
makerTokenAddress,
takerFillableAmount,
takerTokenAddress,
this._exchangeContractAddress,
feeRecepient,
expirationUnixTimestampSec,
);
return signedOrder;
}
private async _increaseBalanceAndAllowanceAsync(
tokenAddress: string,
address: string,
amount: BigNumber,
): Promise<void> {
if (amount.isZero() || address === constants.NULL_ADDRESS) {
return; // noop
}
await Promise.all([
this._increaseBalanceAsync(tokenAddress, address, amount),
this._increaseAllowanceAsync(tokenAddress, address, amount),
]);
}
private async _increaseBalanceAsync(tokenAddress: string, address: string, amount: BigNumber): Promise<void> {
const token = new TokenContract(
artifacts.Token.abi,
tokenAddress,
this._web3Wrapper.getProvider(),
this._web3Wrapper.getContractDefaults(),
);
await token.transfer.sendTransactionAsync(address, amount, {
from: this._coinbase,
});
}
private async _increaseAllowanceAsync(tokenAddress: string, address: string, amount: BigNumber): Promise<void> {
const tokenInstance = new TokenContract(
artifacts.Token.abi,
tokenAddress,
this._web3Wrapper.getProvider(),
this._web3Wrapper.getContractDefaults(),
);
const networkId = await this._web3Wrapper.getNetworkIdAsync();
const networkArtifactsIfExists = artifacts.TokenTransferProxy.networks[networkId];
if (_.isUndefined(networkArtifactsIfExists)) {
throw new Error(`Did not find network artifacts for networkId: ${networkId}`);
}
const proxyAddress = networkArtifactsIfExists.address;
const oldMakerAllowance = await tokenInstance.allowance.callAsync(address, proxyAddress);
const newMakerAllowance = oldMakerAllowance.plus(amount);
await tokenInstance.approve.sendTransactionAsync(proxyAddress, newMakerAllowance, {
from: address,
});
}
}
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