32 lines
1.1 KiB
TypeScript
32 lines
1.1 KiB
TypeScript
import { signingUtils } from '@0x/contracts-test-utils';
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import { SignatureType, SignedZeroExTransaction } from '@0x/types';
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import { hexUtils } from '@0x/utils';
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import { hashUtils } from './hash_utils';
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import { SignedCoordinatorApproval } from './types';
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export class ApprovalFactory {
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private readonly _privateKey: Buffer;
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private readonly _verifyingContractAddress: string;
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constructor(privateKey: Buffer, verifyingContract: string) {
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this._privateKey = privateKey;
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this._verifyingContractAddress = verifyingContract;
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}
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public newSignedApproval(
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transaction: SignedZeroExTransaction,
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txOrigin: string,
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signatureType: SignatureType = SignatureType.EthSign,
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): SignedCoordinatorApproval {
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const approvalHashBuff = hashUtils.getApprovalHashBuffer(transaction, this._verifyingContractAddress, txOrigin);
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const signatureBuff = signingUtils.signMessage(approvalHashBuff, this._privateKey, signatureType);
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const signedApproval = {
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txOrigin,
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transaction,
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signature: hexUtils.concat(signatureBuff),
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};
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return signedApproval;
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}
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}
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