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const DepositVerifier = artifacts.require("../../contracts/DepositVerifier");
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const WithdrawVerifier = artifacts.require("../../contracts/WithdrawVerifier");
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const Miksi = artifacts.require("../../contracts/Miksi.sol");
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const chai = require("chai");
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const expect = chai.expect;
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const truffleAssert = require('truffle-assertions');
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const fs = require("fs");
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const { groth } = require('snarkjs');
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const { stringifyBigInts, unstringifyBigInts } = require('ffjavascript').utils;
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const WitnessCalculatorBuilder = require("circom_runtime").WitnessCalculatorBuilder;
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const circomlib = require("circomlib");
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const smt = require("circomlib").smt;
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let insVerifier;
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let insMiksi;
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const nLevels = 5;
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const secret = ["1234567890", "987654321", "123"];
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const coinCode = "0"; // refearing to ETH
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const ethAmount = '1';
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const amount = web3.utils.toWei(ethAmount, 'ether');
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const nullifier = ["567891234", "432198765", "321"];
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let commitment = [];
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let tree;
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let oldKey = [];
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let oldValue = [];
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let siblingsOld = [];
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let siblingsNew = [];
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let rootOld = [];
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let rootNew = [];
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// let commitment = [];
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let proof = [];
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let publicSignals = [];
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let commitmentsArray = [];
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let currKey=0;
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let u = 0;
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contract("miksi", (accounts) => {
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const {
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0: owner,
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1: addr1, // used for the deposit
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2: addr2, // used for the withdraw
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3: addr3,
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4: addr4,
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} = accounts;
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before(async () => {
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insDepositVerifier = await DepositVerifier.new();
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insWithdrawVerifier = await WithdrawVerifier.new();
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insMiksi = await Miksi.new(insDepositVerifier.address, insWithdrawVerifier.address);
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});
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before(async() => {
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let balance_wei = await web3.eth.getBalance(addr1);
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// console.log("Balance at " + addr1, web3.utils.fromWei(balance_wei, 'ether'));
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expect(balance_wei).to.be.equal('100000000000000000000');
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tree = await smt.newMemEmptyTrie();
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await tree.insert(currKey, 0);
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await computeTree(0);
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expect(rootOld[0].toString()).to.be.equal('7191590165524151132621032034309259185021876706372059338263145339926209741311');
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// expect(rootNew[0].toString()).to.be.equal('9328869343897770565751281504295758914771207504252217956739346620422361279598');
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});
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it("Make first deposit", async () => {
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await makeDeposit(0, addr1);
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balance_wei = await web3.eth.getBalance(addr1);
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// console.log("Balance at " + addr1, web3.utils.fromWei(balance_wei, 'ether'));
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// expect(balance_wei).to.be.equal('98993526980000000000');
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});
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it("Make second deposit", async () => {
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await computeTree(1);
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await makeDeposit(1, addr3);
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});
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it("Make 3rd deposit", async () => {
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await computeTree(2);
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await makeDeposit(2, addr3);
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});
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it("Get the commitments data", async () => {
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// getCommitments data
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let res = await insMiksi.getCommitments();
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expect(res[0][0].toString()).to.be.equal('189025084074544266465422070282645213792582195466360448472858620722286781863');
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// expect(res[1].toString()).to.be.equal('9328869343897770565751281504295758914771207504252217956739346620422361279598');
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console.log(res[0]);
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commitmentsArray[0] = res[0];
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currKey = res[2];
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});
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it("Rebuild the tree from sc commitments", async () => {
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let treeTmp = await smt.newMemEmptyTrie();
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await treeTmp.insert(0, 0);
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for (let i=0; i<commitmentsArray[0].length; i++) {
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await treeTmp.insert(i+1, commitmentsArray[0][i]);
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}
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expect(treeTmp.root).to.be.equal(tree.root);
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});
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it("Calculate witness and generate the zkProof", async () => {
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await genZKProof(0, addr2, "1");
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await genZKProof(1, addr4, "2");
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await genZKProof(2, addr4, "3");
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});
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it("Try to use the zkProof with another address and get revert", async () => {
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// console.log("Try to reuse the zkproof and expect revert");
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await truffleAssert.fails(
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withdrawSC(0, addr1),
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truffleAssert.ErrorType.REVERT,
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"zkProof withdraw could not be verified"
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);
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});
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it("Withdraw 1 ETH with the zkProof of the 1st deposit to addr2", async () => {
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// withdraw
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// console.log("Withdraw of " + ethAmount + " ETH to " + addr2);
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let resW = await withdrawSC(0, addr2);
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// console.log("resW", resW);
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balance_wei = await web3.eth.getBalance(addr2);
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// console.log("Balance at " + addr2, web3.utils.fromWei(balance_wei, 'ether'));
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expect(balance_wei).to.be.equal('101000000000000000000');
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});
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it("Try to reuse the zkProof and get revert", async () => {
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// console.log("Try to reuse the zkproof and expect revert");
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await truffleAssert.fails(
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withdrawSC(0, addr2),
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truffleAssert.ErrorType.REVERT,
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"nullifier already used"
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);
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balance_wei = await web3.eth.getBalance(addr2);
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expect(balance_wei).to.be.equal('101000000000000000000');
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});
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it("Withdraw 1 ETH with the zkProof of the 2nd deposit to addr4", async () => {
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let resW = await withdrawSC(1, addr4);
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balance_wei = await web3.eth.getBalance(addr4);
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expect(balance_wei).to.be.equal('101000000000000000000');
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});
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it("Withdraw 1 ETH with the zkProof of the 3rd deposit to addr4", async () => {
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let resW = await withdrawSC(2, addr4);
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balance_wei = await web3.eth.getBalance(addr4);
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expect(balance_wei).to.be.equal('102000000000000000000');
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});
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});
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async function computeTree(u) {
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const poseidon = circomlib.poseidon.createHash(6, 8, 57);
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commitment[u] = poseidon([coinCode, amount, secret[u], nullifier[u]]).toString();
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// deposit
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// add commitment into SMT
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// console.log("currKey", currKey);
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rootOld[u] = tree.root;
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const resC = await tree.find(currKey+1);
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assert(!resC.found);
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oldKey[u] = "0";
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oldValue[u] = "0";
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if (!resC.found) {
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oldKey[u] = resC.notFoundKey.toString();
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oldValue[u] = resC.notFoundValue.toString();
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}
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// console.log(oldValue[u]);
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// console.log("FIND", resC);
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siblingsOld[u] = resC.siblings;
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while (siblingsOld[u].length < nLevels) {
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siblingsOld[u].push("0");
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};
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await tree.insert(currKey+1, commitment[u]);
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rootNew[u] = tree.root;
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currKey += 1;
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// console.log("currKey", currKey);
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}
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async function makeDeposit(u, addr) {
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const resC = await tree.find(currKey);
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assert(resC.found);
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siblingsNew[u] = resC.siblings;
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while (siblingsNew[u].length < nLevels) {
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siblingsNew[u].push("0");
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};
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// calculate witness
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const wasm = await fs.promises.readFile("./build/deposit.wasm");
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const input = unstringifyBigInts({
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"coinCode": coinCode,
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"amount": amount,
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"secret": secret[u],
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"nullifier": nullifier[u],
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"oldKey": oldKey[u],
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"oldValue": oldValue[u],
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"siblingsOld": siblingsOld[u],
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"siblingsNew": siblingsNew[u],
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"rootOld": rootOld[u],
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"rootNew": rootNew[u],
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"commitment": commitment[u],
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"key": currKey
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});
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const options = {};
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// console.log("Calculate witness");
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const wc = await WitnessCalculatorBuilder(wasm, options);
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const w = await wc.calculateWitness(input);
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const witness = unstringifyBigInts(stringifyBigInts(w));
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// generate zkproof of commitment using snarkjs (as is a test)
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const provingKey = unstringifyBigInts(JSON.parse(fs.readFileSync("./build/deposit-proving_key.json", "utf8")));
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// console.log("Generate zkSNARK proof");
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const res = groth.genProof(provingKey, witness);
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proof[u] = res.proof;
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publicSignals[u] = res.publicSignals;
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const verificationKey = unstringifyBigInts(JSON.parse(fs.readFileSync("./build/deposit-verification_key.json", "utf8")));
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let pubI = unstringifyBigInts([coinCode, amount, rootOld[u].toString(), rootNew[u].toString(), commitment[u], currKey]);
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let validCheck = groth.isValid(verificationKey, proof[u], pubI);
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assert(validCheck);
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await insMiksi.deposit(
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commitment[u],
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tree.root.toString(),
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[proof[u].pi_a[0].toString(), proof[u].pi_a[1].toString()],
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[
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[proof[u].pi_b[0][1].toString(), proof[u].pi_b[0][0].toString()],
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[proof[u].pi_b[1][1].toString(), proof[u].pi_b[1][0].toString()]
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],
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[proof[u].pi_c[0].toString(), proof[u].pi_c[1].toString()],
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{from: addr, value: amount}
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);
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}
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async function genZKProof(u, addr, k) {
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const resC = await tree.find(k);
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assert(resC.found);
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let siblings = resC.siblings;
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while (siblings.length < nLevels) {
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siblings.push("0");
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};
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// console.log("siblings", siblings);
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// calculate witness
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const wasm = await fs.promises.readFile("./build/withdraw.wasm");
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const input = unstringifyBigInts({
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"coinCode": coinCode,
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"amount": amount,
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"secret": secret[u],
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"nullifier": nullifier[u],
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"siblings": siblings,
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"root": tree.root,
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"address": addr,
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"key": k
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});
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const options = {};
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// console.log("Calculate witness");
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const wc = await WitnessCalculatorBuilder(wasm, options);
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const w = await wc.calculateWitness(input);
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const witness = unstringifyBigInts(stringifyBigInts(w));
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// generate zkproof of commitment using snarkjs (as is a test)
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const provingKey = unstringifyBigInts(JSON.parse(fs.readFileSync("./build/withdraw-proving_key.json", "utf8")));
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// console.log("Generate zkSNARK proof");
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const res = groth.genProof(provingKey, witness);
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proof[u] = res.proof;
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publicSignals[u] = res.publicSignals;
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}
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async function withdrawSC(u, addr) {
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return insMiksi.withdraw(
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addr,
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nullifier[u],
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[proof[u].pi_a[0].toString(), proof[u].pi_a[1].toString()],
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[
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[proof[u].pi_b[0][1].toString(), proof[u].pi_b[0][0].toString()],
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[proof[u].pi_b[1][1].toString(), proof[u].pi_b[1][0].toString()]
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],
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[proof[u].pi_c[0].toString(), proof[u].pi_c[1].toString()]
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);
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}
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