31 lines
1.2 KiB
TypeScript
31 lines
1.2 KiB
TypeScript
import * as ethUtil from 'ethereumjs-util';
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import { TECSignatureType } from './types';
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export const signingUtils = {
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signMessage(message: Buffer, privateKey: Buffer, signatureType: TECSignatureType): Buffer {
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if (signatureType === TECSignatureType.EthSign) {
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const prefixedMessage = ethUtil.hashPersonalMessage(message);
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const ecSignature = ethUtil.ecsign(prefixedMessage, privateKey);
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const signature = Buffer.concat([
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ethUtil.toBuffer(ecSignature.v),
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ecSignature.r,
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ecSignature.s,
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ethUtil.toBuffer(signatureType),
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]);
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return signature;
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} else if (signatureType === TECSignatureType.EIP712) {
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const ecSignature = ethUtil.ecsign(message, privateKey);
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const signature = Buffer.concat([
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ethUtil.toBuffer(ecSignature.v),
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ecSignature.r,
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ecSignature.s,
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ethUtil.toBuffer(signatureType),
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]);
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return signature;
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} else {
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throw new Error(`${signatureType} is not a valid signature type`);
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}
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},
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};
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