snark.js

const snarkjs = require("snarkjs");
const fs = require("fs");
const circomlibjs = require("circomlibjs");
async function run() {
  const poseidon = await circomlibjs.buildPoseidon();
  //   const hash = poseidon.F.toString(poseidon([5]));
  const a = "122";
  const hash =
    "14467678450995291425695410446001142759740457319727550794584424937448392560063";
  const { proof, publicSignals } = await snarkjs.groth16.fullProve(
    { a: a, b: hash },
    "./circuit_js/circuit.wasm",
    "./circuit_final.zkey"
  );

  console.log("Proof: ");
  console.log(JSON.stringify(proof, null, 1));
  console.log("Result: ");
  console.log(publicSignals);

  const vKey = JSON.parse(fs.readFileSync("./verification_key.json"));

  const res = await snarkjs.groth16.verify(vKey, publicSignals, proof);

  if (res === true) {
    console.log("Verification OK");
  } else {
    console.log("Invalid proof");
  }
}

run().then(() => {
  process.exit(0);
});