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import * as _ from 'lodash';
import {Web3Wrapper} from '../web3_wrapper';
import {
ECSignature,
ExchangeContract,
ExchangeContractErrs,
OrderValues,
OrderAddresses,
} from '../types';
import {assert} from '../utils/assert';
import {ContractWrapper} from './contract_wrapper';
import * as ExchangeArtifacts from '../artifacts/Exchange.json';
import {ecSignatureSchema} from '../schemas/ec_signature_schema';
import {ContractResponse} from '../types';
import {constants} from '../utils/constants';
export class ExchangeWrapper extends ContractWrapper {
constructor(web3Wrapper: Web3Wrapper) {
super(web3Wrapper);
}
public async isValidSignatureAsync(dataHex: string, ecSignature: ECSignature,
signerAddressHex: string): Promise<boolean> {
assert.isHexString('dataHex', dataHex);
assert.doesConformToSchema('ecSignature', ecSignature, ecSignatureSchema);
assert.isETHAddressHex('signerAddressHex', signerAddressHex);
const senderAddress = await this.web3Wrapper.getSenderAddressOrThrowAsync();
const exchangeInstance = await this.getExchangeInstanceOrThrowAsync();
const isValidSignature = await exchangeInstance.isValidSignature.call(
signerAddressHex,
dataHex,
ecSignature.v,
ecSignature.r,
ecSignature.s,
{
from: senderAddress,
},
);
return isValidSignature;
}
public async fillOrderAsync(maker: string, taker: string, makerTokenAddress: string,
takerTokenAddress: string, makerTokenAmount: BigNumber.BigNumber,
takerTokenAmount: BigNumber.BigNumber, makerFee: BigNumber.BigNumber,
takerFee: BigNumber.BigNumber, expirationUnixTimestampSec: BigNumber.BigNumber,
feeRecipient: string, fillAmount: BigNumber.BigNumber,
signatureData: ECSignature, salt: BigNumber.BigNumber) {
const senderAddress = await this.web3Wrapper.getSenderAddressOrThrowAsync();
const exchangeInstance = await this.getExchangeInstanceOrThrowAsync();
taker = taker === '' ? constants.NULL_ADDRESS : taker;
const shouldCheckTransfer = true;
const orderAddresses: OrderAddresses = [
maker,
taker,
makerTokenAddress,
takerTokenAddress,
feeRecipient,
];
const orderValues: OrderValues = [
makerTokenAmount,
takerTokenAmount,
makerFee,
takerFee,
expirationUnixTimestampSec,
salt,
];
const response: ContractResponse = await exchangeInstance.fill(
orderAddresses,
orderValues,
fillAmount,
shouldCheckTransfer,
signatureData.v,
signatureData.r,
signatureData.s,
{
from: senderAddress,
},
);
const errEvent = _.find(response.logs, {event: 'LogError'});
if (!_.isUndefined(errEvent)) {
const errCode = errEvent.args.errorId.toNumber();
const humanReadableErrMessage = this.exchangeContractErrToMsg[errCode];
throw new Error(humanReadableErrMessage);
}
return response;
}
private exchangeContractErrToMsg = {
[ExchangeContractErrs.ERROR_FILL_EXPIRED]: 'The order you attempted to fill is expired',
[ExchangeContractErrs.ERROR_CANCEL_EXPIRED]: 'The order you attempted to cancel is expired',
[ExchangeContractErrs.ERROR_FILL_NO_VALUE]: 'This order has already been filled or cancelled',
[ExchangeContractErrs.ERROR_CANCEL_NO_VALUE]: 'This order has already been filled or cancelled',
[ExchangeContractErrs.ERROR_FILL_TRUNCATION]: 'The rounding error was too large when filling this order',
[ExchangeContractErrs.ERROR_FILL_BALANCE_ALLOWANCE]: 'Maker or taker has insufficient balance or allowance',
};
private async getExchangeInstanceOrThrowAsync(): Promise<ExchangeContract> {
const contractInstance = await this.instantiateContractIfExistsAsync((ExchangeArtifacts as any));
return contractInstance as ExchangeContract;
}
}
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