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utils tidy

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Alexey 2019-07-15 21:59:39 +03:00
parent 77e2974d5a
commit 28bdd4508f
1 changed files with 0 additions and 25 deletions
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scripts/utils.js
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@ -1,40 +1,15 @@
// This file is a bit of a mess because of different bigInt formats in websnark and snarkjs
// It will be rewritten during browser integration
const fs = require('fs');
const circom = require("circom");
const snarkjs = require("snarkjs"); const snarkjs = require("snarkjs");
const groth = snarkjs["groth"]; const groth = snarkjs["groth"];
const crypto = require("crypto"); const crypto = require("crypto");
const circomlib = require('circomlib'); const circomlib = require('circomlib');
const pedersen = circomlib.pedersenHash; const pedersen = circomlib.pedersenHash;
const babyjub = circomlib.babyJub; const babyjub = circomlib.babyJub;
const bigInt = snarkjs.bigInt;
const buildGroth16 = require('websnark/src/groth16');
const websnarkUtils = require('websnark/src/utils'); const websnarkUtils = require('websnark/src/utils');
const stringifyBigInts = require("websnark/tools/stringifybigint").stringifyBigInts;
const unstringifyBigInts = require("websnark/tools/stringifybigint").unstringifyBigInts;
const stringifyBigInts2 = require("snarkjs/src/stringifybigint").stringifyBigInts;
const unstringifyBigInts2 = require("snarkjs/src/stringifybigint").unstringifyBigInts; const unstringifyBigInts2 = require("snarkjs/src/stringifybigint").unstringifyBigInts;
const rbigint = (nbytes) => snarkjs.bigInt.leBuff2int(crypto.randomBytes(nbytes)); const rbigint = (nbytes) => snarkjs.bigInt.leBuff2int(crypto.randomBytes(nbytes));
const pedersenHash = (data) => babyjub.unpackPoint(pedersen.hash(data))[0]; const pedersenHash = (data) => babyjub.unpackPoint(pedersen.hash(data))[0];
async function snarkProof(input) {
const witness = require("../build/circuits/withdraw.json");
const pwd = process.cwd();
let pathToProvingKey = 'build/circuits/withdraw_proving_key.bin';
if (pwd.split('/').pop() === 'scripts') {
pathToProvingKey = '../build/circuits/withdraw_proving_key.bin'
}
const proving_key = fs.readFileSync(pathToProvingKey);
const groth16 = await buildGroth16();
let proof = await websnarkUtils.genWitnessAndProve(groth16, input, witness, proving_key.buffer);
return websnarkUtils.toSolidityInput(proof);
}
async function snarkVerify(proof) { async function snarkVerify(proof) {
proof = unstringifyBigInts2(websnarkUtils.fromSolidityInput(proof)); proof = unstringifyBigInts2(websnarkUtils.fromSolidityInput(proof));
const verification_key = unstringifyBigInts2(require('../build/circuits/withdraw_verification_key.json')); const verification_key = unstringifyBigInts2(require('../build/circuits/withdraw_verification_key.json'));