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import BigNumber from 'bignumber.js';
import {ZeroEx, Token, SignedOrder} from '../../src';
import {orderFactory} from '../utils/order_factory';
import {constants} from './constants';
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 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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