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Contract Deposit call successfully called with zkproof

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arnaucube
2020-05-14 00:19:29 +02:00
parent 571e85e61c
commit 693d634064
4 changed files with 97 additions and 13 deletions
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81
index.js
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@@ -1,6 +1,8 @@
var circuit = {};
var provingKey = {};
var witnessCalc = {};
const abi = JSON.parse(`[{"inputs":[{"internalType":"address","name":"_depositVerifierContractAddr","type":"address"},{"internalType":"address","name":"_withdrawVerifierContractAddr","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"uint256","name":"_commitment","type":"uint256"},{"internalType":"uint256","name":"_root","type":"uint256"},{"internalType":"uint256[2]","name":"a","type":"uint256[2]"},{"internalType":"uint256[2][2]","name":"b","type":"uint256[2][2]"},{"internalType":"uint256[2]","name":"c","type":"uint256[2]"}],"name":"deposit","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"getCommitments","outputs":[{"internalType":"uint256[]","name":"","type":"uint256[]"},{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address payable","name":"_address","type":"address"},{"internalType":"uint256","name":"nullifier","type":"uint256"},{"internalType":"uint256[2]","name":"a","type":"uint256[2]"},{"internalType":"uint256[2][2]","name":"b","type":"uint256[2][2]"},{"internalType":"uint256[2]","name":"c","type":"uint256[2]"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]`);
const miksiAddress = "0x6E77f4bB1356426baD1Bd014d04388eFAc197Fe1";
function loadCircuit(circuitname) {
fetch("circuits-files/"+circuitname+"-proving_key.bin").then( (response) => {
@@ -20,19 +22,26 @@ function loadCircuit(circuitname) {
}
async function deposit(circuitname) {
document.getElementById("depositRes").innerHTML = `
Generating zkProof & making the deposit
`;
console.log("circuit:", circuitname);
// TODO
const secret = "1234567890";
const nullifier = "567891234";
const commitments = [];
// getCommitments from the tree
// witness
// calculate witness
console.log(witnessCalc[circuitname]);
const witness = await miksi.calcWitness(witnessCalc[circuitname], secret, nullifier, commitments);
const cw = await miksi.calcWitness(witnessCalc[circuitname], secret, nullifier, commitments);
const witness = cw.witness;
const publicInputs = cw.publicInputs;
console.log("w", witness);
console.log("pi", publicInputs);
// proof
// generate proof
const start = new Date().getTime();
console.log(provingKey[circuitname]);
const proof = await window.groth16GenProof(witness.buffer, provingKey[circuitname]);
@@ -40,10 +49,74 @@ async function deposit(circuitname) {
const time = end - start;
console.log("circuit " + circuitname + " took " + time + "ms to compute");
console.log(proof);
// send tx
const accounts = await web3.eth.getAccounts();
const sender = accounts[0];
console.log("SENDER", sender);
console.log("sc call data",
publicInputs.commitment,
publicInputs.root.toString(),
[proof.pi_a[0], proof.pi_a[1]],
[
[proof.pi_b[0][1], proof.pi_b[0][0]],
[proof.pi_b[1][1], proof.pi_b[1][0]]
],
[proof.pi_c[0], proof.pi_c[1]],
);
miksiContract.methods.deposit(
publicInputs.commitment,
publicInputs.root.toString(),
[proof.pi_a[0], proof.pi_a[1]],
[
[proof.pi_b[0][1], proof.pi_b[0][0]],
[proof.pi_b[1][1], proof.pi_b[1][0]]
],
[proof.pi_c[0], proof.pi_c[1]],
).send(
{from: sender, value: 1000000000000000000},
function(error, transactionHash){
console.log("https://goerli.etherscan.io/tx/"+transactionHash);
console.log(error);
});
// print secret & nullifier
document.getElementById("depositRes").innerHTML = `
Secret: <b>`+secret+`</b><br>
Nullifier: <b>`+nullifier+`</b><br>
`;
}
loadCircuit("deposit");
loadCircuit("withdraw");
// var web3 = new Web3(Web3.givenProvider || "ws://localhost:8545");
let miksiContract;
function connectMetamask() {
const ethEnabled = () => {
if (window.web3) {
window.web3 = new Web3(window.web3.currentProvider);
window.ethereum.enable();
return true;
}
return false;
}
if (!ethEnabled()) {
alert("Please install MetaMask to use miksi");
}
console.log("abi", abi);
miksiContract = new web3.eth.Contract(abi, miksiAddress);
console.log("miksiContract", miksiContract);
web3.eth.getBalance("0x35d4dCDdB728CeBF80F748be65bf84C776B0Fbaf", function(err, res){console.log("BAL", JSON.stringify(res));});
miksiContract.methods.getCommitments().call()
.then(console.log);
}