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import {Web3Wrapper} from '@0xproject/web3-wrapper';
import BigNumber from 'bignumber.js';
import {SignedOrder, Token, ZeroEx} from '../../src';
import {artifacts} from '../../src/artifacts';
import {DummyTokenContract} from '../../src/contract_wrappers/generated/dummy_token';
import {orderFactory} from '../utils/order_factory';
import {constants} from './constants';
const INITIAL_COINBASE_TOKEN_SUPPLY_IN_UNITS = new BigNumber(100);
export class FillScenarios {
private _zeroEx: ZeroEx;
private _userAddresses: string[];
private _tokens: Token[];
private _coinbase: string;
private _zrxTokenAddress: string;
private _exchangeContractAddress: string;
constructor(zeroEx: ZeroEx, userAddresses: string[],
tokens: Token[], zrxTokenAddress: string, exchangeContractAddress: string) {
this._zeroEx = zeroEx;
this._userAddresses = userAddresses;
this._tokens = tokens;
this._coinbase = userAddresses[0];
this._zrxTokenAddress = zrxTokenAddress;
this._exchangeContractAddress = exchangeContractAddress;
}
public async initTokenBalancesAsync() {
const web3Wrapper = (this._zeroEx as any)._web3Wrapper as Web3Wrapper;
for (const token of this._tokens) {
if (token.symbol !== 'ZRX' && token.symbol !== 'WETH') {
const contractInstance = web3Wrapper.getContractInstance(
artifacts.DummyTokenArtifact.abi, token.address,
);
const defaults = {};
const dummyToken = new DummyTokenContract(contractInstance, defaults);
const tokenSupply = ZeroEx.toBaseUnitAmount(INITIAL_COINBASE_TOKEN_SUPPLY_IN_UNITS, token.decimals);
const txHash = await dummyToken.setBalance.sendTransactionAsync(this._coinbase, tokenSupply, {
from: this._coinbase,
});
await this._zeroEx.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) {
const [makerAddress] = this._userAddresses;
const signedOrder = await this.createAsymmetricFillableSignedOrderAsync(
makerTokenAddress, takerTokenAddress, makerAddress, takerAddress,
fillableAmount, fillableAmount,
);
const shouldThrowOnInsufficientBalanceOrAllowance = false;
await this._zeroEx.exchange.fillOrderAsync(
signedOrder, partialFillAmount, shouldThrowOnInsufficientBalanceOrAllowance, 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._zeroEx,
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 === ZeroEx.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> {
await this._zeroEx.token.transferAsync(tokenAddress, this._coinbase, address, amount);
}
private async _increaseAllowanceAsync(
tokenAddress: string, address: string, amount: BigNumber): Promise<void> {
const oldMakerAllowance = await this._zeroEx.token.getProxyAllowanceAsync(tokenAddress, address);
const newMakerAllowance = oldMakerAllowance.plus(amount);
await this._zeroEx.token.setProxyAllowanceAsync(
tokenAddress, address, newMakerAllowance,
);
}
}
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