@stellot/crypto/lib/esm/blindSignature/SignerSession.js

Crypto libraries for front and backend

import { ed25519 } from './index';
import { randomScalar } from './utils';
export default class SignerSession {
    constructor(secretKey) {
        const keypair = ed25519.keyFromSecret(secretKey);
        this.x = keypair.priv();
        this.P = keypair.pub();
        this.k = randomScalar();
        this.R = ed25519.curve.g.mul(this.k);
    }
    publicKey() {
        return this.P;
    }
    publicNonce() {
        return this.R;
    }
    sign(challenge) {
        return this.x
            .mul(challenge)
            .add(this.k)
            .umod(ed25519.curve.n);
    }
}