35 lines
1.4 KiB
TypeScript
35 lines
1.4 KiB
TypeScript
import { generatePseudoRandomSalt } from '@0x/order-utils';
|
|
import { SignedZeroExTransaction } from '@0x/types';
|
|
import * as ethUtil from 'ethereumjs-util';
|
|
|
|
import { hashUtils, signingUtils, TECSignatureType } from './index';
|
|
|
|
export class TECTransactionFactory {
|
|
private readonly _signerBuff: Buffer;
|
|
private readonly _verifyingContractAddress: string;
|
|
private readonly _privateKey: Buffer;
|
|
constructor(privateKey: Buffer, verifyingContractAddress: string) {
|
|
this._privateKey = privateKey;
|
|
this._verifyingContractAddress = verifyingContractAddress;
|
|
this._signerBuff = ethUtil.privateToAddress(this._privateKey);
|
|
}
|
|
public newSignedTECTransaction(
|
|
data: string,
|
|
signatureType: TECSignatureType = TECSignatureType.EthSign,
|
|
): SignedZeroExTransaction {
|
|
const transaction = {
|
|
verifyingContractAddress: this._verifyingContractAddress,
|
|
signerAddress: ethUtil.addHexPrefix(this._signerBuff.toString('hex')),
|
|
salt: generatePseudoRandomSalt(),
|
|
data,
|
|
};
|
|
const transactionHashBuff = hashUtils.getTransactionHashBuffer(transaction);
|
|
const signatureBuff = signingUtils.signMessage(transactionHashBuff, this._privateKey, signatureType);
|
|
const signedTransaction = {
|
|
...transaction,
|
|
signature: ethUtil.addHexPrefix(signatureBuff.toString('hex')),
|
|
};
|
|
return signedTransaction;
|
|
}
|
|
}
|