Add tests for hashing libs

contracts/tec/test/libs.ts

@@ -0,0 +1,65 @@
+import { chaiSetup, constants, provider, txDefaults, web3Wrapper } from '@0x/contracts-test-utils';
+import { BlockchainLifecycle } from '@0x/dev-utils';
+import { BigNumber } from '@0x/utils';
+import * as chai from 'chai';
+
+import { approvalHashUtils, artifacts, TestLibsContract } from '../src';
+
+chaiSetup.configure();
+const expect = chai.expect;
+const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
+
+describe('Libs tests', () => {
+    let testLibs: TestLibsContract;
+
+    before(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    after(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    before(async () => {
+        testLibs = await TestLibsContract.deployFrom0xArtifactAsync(artifacts.TestLibs, provider, txDefaults);
+    });
+    beforeEach(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    afterEach(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+
+    describe('getTransactionHash', () => {
+        it('should return the correct transaction hash', async () => {
+            const tx = {
+                verifyingContractAddress: testLibs.address,
+                salt: new BigNumber(0),
+                signerAddress: constants.NULL_ADDRESS,
+                data: '0x1234',
+            };
+            const expectedTxHash = approvalHashUtils._getTransactionHashHex(tx);
+            const txHash = await testLibs.publicGetTransactionHash.callAsync(tx);
+            expect(expectedTxHash).to.eq(txHash);
+        });
+    });
+
+    describe('getApprovalHash', () => {
+        it('should return the correct approval hash', async () => {
+            const signedTx = {
+                verifyingContractAddress: testLibs.address,
+                salt: new BigNumber(0),
+                signerAddress: constants.NULL_ADDRESS,
+                data: '0x1234',
+                signature: '0x5678',
+            };
+            const approvalExpirationTimeSeconds = new BigNumber(0);
+            const approval = {
+                transactionHash: approvalHashUtils._getTransactionHashHex(signedTx),
+                transactionSignature: signedTx.signature,
+                approvalExpirationTimeSeconds,
+            };
+            const expectedApprovalHash = approvalHashUtils.getApprovalHashHex(signedTx, approvalExpirationTimeSeconds);
+            const approvalHash = await testLibs.publicGetTECApprovalHash.callAsync(approval);
+            expect(expectedApprovalHash).to.eq(approvalHash);
+        });
+    });
+});

contracts/tec/test/utils/approval_hash.ts

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+import { eip712Utils, EXCHANGE_ZEROEX_TRANSACTION_SCHEMA } from '@0x/order-utils';
+import { SignedZeroExTransaction, ZeroExTransaction } from '@0x/types';
+import { BigNumber, signTypedDataUtils } from '@0x/utils';
+import * as _ from 'lodash';
+
+import { constants } from './constants';
+
+export const approvalHashUtils = {
+    getApprovalHashBuffer(transaction: SignedZeroExTransaction, approvalExpirationTimeSeconds: BigNumber): Buffer {
+        const domain = {
+            name: constants.TEC_DOMAIN_NAME,
+            version: constants.TEC_DOMAIN_VERSION,
+            verifyingContractAddress: transaction.verifyingContractAddress,
+        };
+        const transactionHash = approvalHashUtils._getTransactionHashHex(transaction);
+        const approval = {
+            transactionHash,
+            transactionSignature: transaction.signature,
+            approvalExpirationTimeSeconds: approvalExpirationTimeSeconds.toString(),
+        };
+        const typedData = eip712Utils.createTypedData(
+            constants.TEC_APPROVAL_SCHEMA.name,
+            {
+                TECApproval: constants.TEC_APPROVAL_SCHEMA.parameters,
+            },
+            approval,
+            domain,
+        );
+        const hashBuffer = signTypedDataUtils.generateTypedDataHash(typedData);
+        return hashBuffer;
+    },
+    getApprovalHashHex(transaction: SignedZeroExTransaction, approvalExpirationTimeSeconds: BigNumber): string {
+        const hashHex = `0x${approvalHashUtils
+            .getApprovalHashBuffer(transaction, approvalExpirationTimeSeconds)
+            .toString('hex')}`;
+        return hashHex;
+    },
+    _getTransactionHashBuffer(transaction: ZeroExTransaction | SignedZeroExTransaction): Buffer {
+        const domain = {
+            name: constants.TEC_DOMAIN_NAME,
+            version: constants.TEC_DOMAIN_VERSION,
+            verifyingContractAddress: transaction.verifyingContractAddress,
+        };
+        const normalizedTransaction = _.mapValues(transaction, value => {
+            return !_.isString(value) ? value.toString() : value;
+        });
+        const typedData = eip712Utils.createTypedData(
+            EXCHANGE_ZEROEX_TRANSACTION_SCHEMA.name,
+            { ZeroExTransaction: EXCHANGE_ZEROEX_TRANSACTION_SCHEMA.parameters },
+            normalizedTransaction,
+            domain,
+        );
+        const hashBuffer = signTypedDataUtils.generateTypedDataHash(typedData);
+        return hashBuffer;
+    },
+    _getTransactionHashHex(transaction: ZeroExTransaction | SignedZeroExTransaction): string {
+        const hashHex = `0x${approvalHashUtils._getTransactionHashBuffer(transaction).toString('hex')}`;
+        return hashHex;
+    },
+};

contracts/tec/test/utils/index.ts

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+export { approvalHashUtils } from './approval_hash';