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-rw-r--r--src/contract_wrappers/exchange_wrapper.ts37
1 files changed, 37 insertions, 0 deletions
diff --git a/src/contract_wrappers/exchange_wrapper.ts b/src/contract_wrappers/exchange_wrapper.ts
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+++ b/src/contract_wrappers/exchange_wrapper.ts
@@ -0,0 +1,37 @@
+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<boolean> {
+ 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;
+ }
+}