@btc-vision/transaction/build/keypair/MessageSigner.js

OPNet transaction library allows you to create and sign transactions for the OPNet network.

import * as ecc from '@bitcoinerlab/secp256k1';
import { crypto, toXOnly } from '@btc-vision/bitcoin';
import { TweakedSigner } from '../signer/TweakedSigner.js';
import { EcKeyPair } from './EcKeyPair.js';
class MessageSignerBase {
    sha256(message) {
        return crypto.sha256(Buffer.from(message));
    }
    tweakAndSignMessage(keypair, message, network) {
        const tweaked = TweakedSigner.tweakSigner(keypair, {
            network,
        });
        return this.signMessage(tweaked, message);
    }
    signMessage(keypair, message) {
        if (typeof message === 'string') {
            message = Buffer.from(message, 'utf-8');
        }
        if (!keypair.privateKey) {
            throw new Error('Private key not found in keypair.');
        }
        const hashedMessage = this.sha256(message);
        return {
            signature: ecc.signSchnorr(hashedMessage, keypair.privateKey),
            message: hashedMessage,
        };
    }
    verifySignature(publicKey, message, signature) {
        if (typeof message === 'string') {
            message = Buffer.from(message, 'utf-8');
        }
        if (signature.length !== 64) {
            throw new Error('Invalid signature length.');
        }
        const hashedMessage = this.sha256(message);
        return ecc.verifySchnorr(hashedMessage, toXOnly(Buffer.from(publicKey)), signature);
    }
    tweakAndVerifySignature(publicKey, message, signature) {
        const tweakedPublicKey = EcKeyPair.tweakPublicKey(Buffer.from(publicKey));
        return this.verifySignature(tweakedPublicKey, message, signature);
    }
}
export const MessageSigner = new MessageSignerBase();