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

JS implementation of JWZ

import { witnessBuilder } from './witness_calculator';
import { groth16 } from 'snarkjs';
import { fromBigEndian } from '@iden3/js-iden3-core';
export const Groth16 = 'groth16';
export const AuthCircuit = 'auth';
export const AuthV2Circuit = 'authV2';
const textDecoder = new TextDecoder();
export async function prove(inputs, provingKey, wasm) {
    const witnessCalculator = await witnessBuilder(wasm);
    const jsonString = new TextDecoder().decode(inputs);
    const parsedData = JSON.parse(jsonString);
    const wtnsBytes = await witnessCalculator.calculateWTNSBin(parsedData, 0);
    const { proof, publicSignals } = await groth16.prove(provingKey, wtnsBytes);
    return {
        proof: proof,
        pub_signals: publicSignals
    };
}
export async function verify(messageHash, proof, verificationKey, unmarshall) {
    const outputs = unmarshall(proof.pub_signals);
    if (outputs.challenge !== fromBigEndian(messageHash)) {
        throw new Error('challenge is not equal to message hash');
    }
    const result = await groth16.verify(JSON.parse(textDecoder.decode(verificationKey)), proof.pub_signals, proof.proof);
    return result;
}