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poma 2021-02-11 09:23:18 +03:00
parent c6b442713a
commit 346ffcee3c
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35 changed files with 852 additions and 8943 deletions
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22
minimal-demo.js
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@ -18,13 +18,15 @@ const AMOUNT = '1'
// CURRENCY = 'ETH'
/** Generate random number of specified byte length */
const rbigint = nbytes => bigInt.leBuff2int(crypto.randomBytes(nbytes))
const rbigint = (nbytes) => bigInt.leBuff2int(crypto.randomBytes(nbytes))
/** Compute pedersen hash */
const pedersenHash = data => circomlib.babyJub.unpackPoint(circomlib.pedersenHash.hash(data))[0]
const pedersenHash = (data) => circomlib.babyJub.unpackPoint(circomlib.pedersenHash.hash(data))[0]
/** BigNumber to hex string of specified length */
const toHex = (number, length = 32) => '0x' + (number instanceof Buffer ? number.toString('hex') : bigInt(number).toString(16)).padStart(length * 2, '0')
const toHex = (number, length = 32) =>
'0x' +
(number instanceof Buffer ? number.toString('hex') : bigInt(number).toString(16)).padStart(length * 2, '0')
/**
* Create deposit object from secret and nullifier
@ -43,7 +45,9 @@ function createDeposit(nullifier, secret) {
async function deposit() {
const deposit = createDeposit(rbigint(31), rbigint(31))
console.log('Sending deposit transaction...')
const tx = await contract.methods.deposit(toHex(deposit.commitment)).send({ value: toWei(AMOUNT), from: web3.eth.defaultAccount, gas:2e6 })
const tx = await contract.methods
.deposit(toHex(deposit.commitment))
.send({ value: toWei(AMOUNT), from: web3.eth.defaultAccount, gas: 2e6 })
console.log(`https://kovan.etherscan.io/tx/${tx.transactionHash}`)
return `tornado-eth-${AMOUNT}-${netId}-${toHex(deposit.preimage, 62)}`
}
@ -87,11 +91,11 @@ async function generateMerkleProof(deposit) {
const events = await contract.getPastEvents('Deposit', { fromBlock: 0, toBlock: 'latest' })
const leaves = events
.sort((a, b) => a.returnValues.leafIndex - b.returnValues.leafIndex) // Sort events in chronological order
.map(e => e.returnValues.commitment)
.map((e) => e.returnValues.commitment)
const tree = new merkleTree(MERKLE_TREE_HEIGHT, leaves)
// Find current commitment in the tree
let depositEvent = events.find(e => e.returnValues.commitment === toHex(deposit.commitment))
let depositEvent = events.find((e) => e.returnValues.commitment === toHex(deposit.commitment))
let leafIndex = depositEvent ? depositEvent.returnValues.leafIndex : -1
// Validate that our data is correct (optional)
@ -141,14 +145,16 @@ async function generateSnarkProof(deposit, recipient) {
toHex(input.recipient, 20),
toHex(input.relayer, 20),
toHex(input.fee),
toHex(input.refund)
toHex(input.refund),
]
return { proof, args }
}
async function main() {
web3 = new Web3(new Web3.providers.HttpProvider(RPC_URL, { timeout: 5 * 60 * 1000 }), null, { transactionConfirmationBlocks: 1 })
web3 = new Web3(new Web3.providers.HttpProvider(RPC_URL, { timeout: 5 * 60 * 1000 }), null, {
transactionConfirmationBlocks: 1,
})
circuit = require('./build/circuits/withdraw.json')
proving_key = fs.readFileSync('build/circuits/withdraw_proving_key.bin').buffer
groth16 = await buildGroth16()