42 lines
1.5 KiB
TypeScript
42 lines
1.5 KiB
TypeScript
import { signingUtils } from '@0x/contracts-test-utils';
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import { SignatureType } from '@0x/types';
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import { BigNumber } from '@0x/utils';
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import * as ethUtil from 'ethereumjs-util';
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import { hashUtils } from './hash_utils';
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import { SignedStakingPoolApproval } 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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private readonly _chainId: number;
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constructor(privateKey: Buffer, verifyingContractAddress: string, chainId: number) {
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this._privateKey = privateKey;
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this._verifyingContractAddress = verifyingContractAddress;
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this._chainId = chainId;
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}
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public newSignedApproval(
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poolId: string,
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makerAddress: string,
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signatureType: SignatureType = SignatureType.EthSign,
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): SignedStakingPoolApproval {
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const approvalHashBuff = hashUtils.getStakingPoolApprovalHashBuffer(
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poolId,
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makerAddress,
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this._verifyingContractAddress,
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this._chainId,
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);
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const signatureBuff = signingUtils.signMessage(approvalHashBuff, this._privateKey, signatureType);
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const signedApproval = {
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makerAddress,
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poolId,
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verifyingContractAddress: this._verifyingContractAddress,
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chainId: this._chainId,
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signature: ethUtil.addHexPrefix(signatureBuff.toString('hex')),
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};
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return signedApproval;
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}
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}
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