@iden3/js-jwz/dist/node/esm/authGroth16.js

JS implementation of JWZ

import { ProvingMethodAlg } from './proving';
import { Id } from '@iden3/js-iden3-core';
import { AuthCircuit, Groth16, prove, verify } from './common';
// ProvingMethodGroth16Auth defines proofs family and specific circuit
class ProvingMethodGroth16Auth {
    constructor(methodAlg) {
        this.methodAlg = methodAlg;
    }
    get alg() {
        return this.methodAlg.alg;
    }
    get circuitId() {
        return this.methodAlg.circuitId;
    }
    unmarshall(pubsignals) {
        const outputs = {};
        if (pubsignals.length != 3) {
            throw new Error(`invalid number of Output values expected ${3} got ${pubsignals.length}`);
        }
        outputs.challenge = BigInt(pubsignals[0]);
        outputs.userState = BigInt(pubsignals[1]);
        outputs.userId = Id.fromBigInt(BigInt(pubsignals[2]));
        return outputs;
    }
    async verify(messageHash, proof, verificationKey) {
        return verify(messageHash, proof, verificationKey, this.unmarshall);
    }
    prove(inputs, provingKey, wasm) {
        return prove(inputs, provingKey, wasm);
    }
}
export const provingMethodGroth16AuthInstance = new ProvingMethodGroth16Auth(new ProvingMethodAlg(Groth16, AuthCircuit));