import * as _ from 'lodash'; import {Web3Wrapper} from '../web3_wrapper'; import {ECSignature, ZeroExError, ExchangeContract} 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'; export class ExchangeWrapper extends ContractWrapper { constructor(web3Wrapper: Web3Wrapper) { super(web3Wrapper); } public async isValidSignatureAsync(dataHex: string, ecSignature: ECSignature, signerAddressHex: string): Promise { assert.isHexString('dataHex', dataHex); assert.doesConformToSchema('ecSignature', ecSignature, ECSignatureSchema); assert.isETHAddressHex('signerAddressHex', signerAddressHex); const senderAddressIfExists = await this.web3Wrapper.getSenderAddressIfExistsAsync(); assert.assert(!_.isUndefined(senderAddressIfExists), ZeroExError.USER_HAS_NO_ASSOCIATED_ADDRESSES); const contractInstance = await this.instantiateContractIfExistsAsync((ExchangeArtifacts as any)); const exchangeInstance = contractInstance as ExchangeContract; const isValidSignature = await exchangeInstance.isValidSignature.call( signerAddressHex, dataHex, ecSignature.v, ecSignature.r, ecSignature.s, { from: senderAddressIfExists, }, ); return isValidSignature; } }