48 lines
1.7 KiB
TypeScript
48 lines
1.7 KiB
TypeScript
import { constants, eip712Utils, transactionHashUtils } from '@0x/order-utils';
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import { SignedZeroExTransaction } from '@0x/types';
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import { BigNumber, signTypedDataUtils } from '@0x/utils';
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import * as _ from 'lodash';
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export const hashUtils = {
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getApprovalHashBuffer(
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transaction: SignedZeroExTransaction,
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verifyingContractAddress: string,
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txOrigin: string,
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approvalExpirationTimeSeconds: BigNumber,
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): Buffer {
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const domain = {
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name: constants.COORDINATOR_DOMAIN_NAME,
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version: constants.COORDINATOR_DOMAIN_VERSION,
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verifyingContractAddress,
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};
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const transactionHash = transactionHashUtils.getTransactionHashHex(transaction);
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const approval = {
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txOrigin,
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transactionHash,
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transactionSignature: transaction.signature,
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approvalExpirationTimeSeconds: approvalExpirationTimeSeconds.toString(),
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};
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const typedData = eip712Utils.createTypedData(
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constants.COORDINATOR_APPROVAL_SCHEMA.name,
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{
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CoordinatorApproval: constants.COORDINATOR_APPROVAL_SCHEMA.parameters,
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},
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approval,
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domain,
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);
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const hashBuffer = signTypedDataUtils.generateTypedDataHash(typedData);
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return hashBuffer;
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},
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getApprovalHashHex(
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transaction: SignedZeroExTransaction,
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verifyingContractAddress: string,
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txOrigin: string,
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approvalExpirationTimeSeconds: BigNumber,
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): string {
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const hashHex = `0x${hashUtils
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.getApprovalHashBuffer(transaction, verifyingContractAddress, txOrigin, approvalExpirationTimeSeconds)
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.toString('hex')}`;
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return hashHex;
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},
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};
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