tornadocash
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tornado-relayer
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This commit is contained in:
Alexey 2020-08-04 10:39:56 +03:00
parent cb6cd89665
commit 850cfb3f7e
11 changed files with 155 additions and 117 deletions
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21
.eslintrc.json
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@ -21,23 +21,12 @@
"SwitchCase": 1
}
],
"linebreak-style": [
"error",
"unix"
],
"quotes": [
"error",
"single"
],
"semi": [
"error",
"never"
],
"object-curly-spacing": [
"error",
"always"
],
"linebreak-style": ["error", "unix"],
"quotes": ["error", "single"],
"semi": ["error", "never"],
"object-curly-spacing": ["error", "always"],
"require-await": "error",
"comma-dangle": ["error", "never"],
"space-before-function-paren": [
"error",
{

7
.prettierrc Normal file
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@ -0,0 +1,7 @@
{
"semi": false,
"arrowParens": "always",
"singleQuote": true,
"printWidth": 110,
"trailingComma": "none"
}

41
README.md
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@ -1,18 +1,21 @@
# Relayer for Tornado Cash [![Build Status](https://travis-ci.org/tornadocash/relayer.svg?branch=master)](https://travis-ci.org/tornadocash/relayer) [![Docker Cloud Build Status](https://img.shields.io/docker/cloud/build/tornadocash/relayer.svg)](https://hub.docker.com/r/tornadocash/relayer/builds)
## Run locally
1. `npm i`
2. `cp .env.example .env`
3. Modify `.env` as needed
4. `npm run start`
5. Go to `http://127.0.0.1:8000`
6. In order to execute withdraw request, you can run following command
6. In order to execute withdraw request, you can run following command
```bash
curl -X POST -H 'content-type:application/json' --data '<input data>' http://127.0.0.1:8000/relay
```
Relayer should return a transaction hash.
*Note.* If you want to change contracts' addresses go to [config.js](./config.js) file.
_Note._ If you want to change contracts' addresses go to [config.js](./config.js) file.
## Deploy with docker-compose
@ -20,11 +23,11 @@ docker-compose.yml contains a stack that will automatically provision SSL certif
1. Download docker-compose.yml
2. Change environment variables for `kovan` containers as appropriate
* add `PRIVATE_KEY` for your relayer address (without 0x prefix)
* set `VIRTUAL_HOST` and `LETSENCRYPT_HOST` to your domain and add DNS record pointing to your relayer ip address
* customize `RELAYER_FEE`
* update `RPC_URL` if needed
* update `REDIS_URL` if needed
- add `PRIVATE_KEY` for your relayer address (without 0x prefix)
- set `VIRTUAL_HOST` and `LETSENCRYPT_HOST` to your domain and add DNS record pointing to your relayer ip address
- customize `RELAYER_FEE`
- update `RPC_URL` if needed
- update `REDIS_URL` if needed
3. Run `docker-compose up -d`
## Run as a Docker container
@ -33,26 +36,26 @@ docker-compose.yml contains a stack that will automatically provision SSL certif
2. Modify `.env` as needed
3. `docker run -d --env-file .env -p 80:8000 tornadocash/relayer`
In that case you will need to add https termination yourself because browsers with default settings will prevent https
In that case you will need to add https termination yourself because browsers with default settings will prevent https
tornado.cash UI from submitting your request over http connection
## Input data example
```json
{
"proof": "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",
"args": [
"0x1579d41e5290ab5bcec9a7df16705e49b5c0b869095299196c19c5e14462c9e3",
"0x0cf7f49c5b35c48b9e1d43713e0b46a75977e3d10521e9ac1e4c3cd5e3da1c5d",
"0x03ebd0748aa4d1457cf479cce56309641e0a98f5",
"0xbd4369dc854c5d5b79fe25492e3a3cfcb5d02da5",
"0x000000000000000000000000000000000000000000000000058d15e176280000",
"0x0000000000000000000000000000000000000000000000000000000000000000"
],
"contract": "0xA27E34Ad97F171846bAf21399c370c9CE6129e0D"
"proof": "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",
"args": [
"0x1579d41e5290ab5bcec9a7df16705e49b5c0b869095299196c19c5e14462c9e3",
"0x0cf7f49c5b35c48b9e1d43713e0b46a75977e3d10521e9ac1e4c3cd5e3da1c5d",
"0x03ebd0748aa4d1457cf479cce56309641e0a98f5",
"0xbd4369dc854c5d5b79fe25492e3a3cfcb5d02da5",
"0x000000000000000000000000000000000000000000000000058d15e176280000",
"0x0000000000000000000000000000000000000000000000000000000000000000"
],
"contract": "0xA27E34Ad97F171846bAf21399c370c9CE6129e0D"
}
```
Disclaimer:
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

2
app.js
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@ -1 +1 @@
module.exports = require('./src/index')
module.exports = require('./src/index')

4
src/Fetcher.js
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@ -30,9 +30,7 @@ class Fetcher {
}
async fetchPrices() {
try {
let prices = await this.oracle.methods
.getPricesInETH(this.tokenAddresses, this.oneUintAmount)
.call()
let prices = await this.oracle.methods.getPricesInETH(this.tokenAddresses, this.oneUintAmount).call()
this.ethPrices = prices.reduce((acc, price, i) => {
acc[this.currencyLookup[this.tokenAddresses[i]]] = price
return acc

14
src/index.js
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@ -34,16 +34,17 @@ app.use(function (req, res, next) {
app.get('/', function (req, res) {
// just for testing purposes
res.send('This is <a href=https://tornado.cash>tornado.cash</a> Relayer service. Check the <a href=/status>/status</a> for settings')
res.send(
'This is <a href=https://tornado.cash>tornado.cash</a> Relayer service. Check the <a href=/status>/status</a> for settings'
)
})
app.get('/status', async function (req, res) {
let nonce = await redisClient.get('nonce')
let latestBlock = null
try {
latestBlock = await web3.eth.getBlockNumber()
} catch(e) {
} catch (e) {
console.error('Problem with RPC', e)
}
const { ethPrices } = fetcher
@ -74,7 +75,12 @@ console.log(`mixers: ${JSON.stringify(mixers)}`)
console.log(`netId: ${netId}`)
console.log(`ethPrices: ${JSON.stringify(fetcher.ethPrices)}`)
const { GAS_PRICE_BUMP_PERCENTAGE, ALLOWABLE_PENDING_TX_TIMEOUT, NONCE_WATCHER_INTERVAL, MAX_GAS_PRICE } = process.env
const {
GAS_PRICE_BUMP_PERCENTAGE,
ALLOWABLE_PENDING_TX_TIMEOUT,
NONCE_WATCHER_INTERVAL,
MAX_GAS_PRICE
} = process.env
if (!NONCE_WATCHER_INTERVAL) {
console.log(`NONCE_WATCHER_INTERVAL is not set. Using default value ${watherInterval / 1000} sec`)
}

2
src/redis.js
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@ -16,4 +16,4 @@ const redisOpts = {
}
}
module.exports = { redisOpts, redisClient }
module.exports = { redisOpts, redisClient }

36
src/relayController.js
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@ -1,9 +1,7 @@
const Queue = require('bull')
const { numberToHex, toWei, toHex, toBN, toChecksumAddress } = require('web3-utils')
const mixerABI = require('../abis/mixerABI.json')
const {
isValidProof, isValidArgs, isKnownContract, isEnoughFee
} = require('./utils')
const { isValidProof, isValidArgs, isKnownContract, isEnoughFee } = require('./utils')
const config = require('../config')
const { redisClient, redisOpts } = require('./redis')
@ -28,14 +26,15 @@ async function relayController(req, resp) {
return resp.status(400).json({ error: 'Proof format is invalid' })
}
({ valid, reason } = isValidArgs(args))
// eslint-disable-next-line no-extra-semi
;({ valid, reason } = isValidArgs(args))
if (!valid) {
console.log('Args are invalid:', reason)
return resp.status(400).json({ error: 'Withdraw arguments are invalid' })
}
let currency, amount
({ valid, currency, amount } = isKnownContract(contract))
;({ valid, currency, amount } = isKnownContract(contract))
if (!valid) {
console.log('Contract does not exist:', contract)
return resp.status(400).json({ error: 'This relayer does not support the token' })
@ -59,9 +58,20 @@ async function relayController(req, resp) {
return resp.status(400).json({ error: 'Relayer address is invalid' })
}
requestJob = await withdrawQueue.add({
contract, nullifierHash, root, proof, args, currency, amount, fee: fee.toString(), refund: refund.toString()
}, { removeOnComplete: true })
requestJob = await withdrawQueue.add(
{
contract,
nullifierHash,
root,
proof,
args,
currency,
amount,
fee: fee.toString(),
refund: refund.toString()
},
{ removeOnComplete: true }
)
reponseCbs[requestJob.id] = resp
}
@ -102,7 +112,15 @@ withdrawQueue.process(async function (job, done) {
gas += 50000
const ethPrices = fetcher.ethPrices
const { isEnough, reason } = isEnoughFee({ gas, gasPrices, currency, amount, refund: toBN(refund), ethPrices, fee: toBN(fee) })
const { isEnough, reason } = isEnoughFee({
gas,
gasPrices,
currency,
amount,
refund: toBN(refund),
ethPrices,
fee: toBN(fee)
})
if (!isEnough) {
console.log(`Wrong fee: ${reason}`)
done(null, {

67
src/sender.js
View File

@ -38,38 +38,43 @@ class Sender {
let signedTx = await this.web3.eth.accounts.signTransaction(tx, config.privateKey)
let result = this.web3.eth.sendSignedTransaction(signedTx.rawTransaction)
result.once('transactionHash', (txHash) => {
console.log(`A new successfully sent tx ${txHash}`)
if (done) {
done(null, {
status: 200,
msg: { txHash }
})
}
}).on('error', async (e) => {
console.log(`Error for tx with nonce ${tx.nonce}\n${e.message}`)
if (e.message === 'Returned error: Transaction gas price supplied is too low. There is another transaction with same nonce in the queue. Try increasing the gas price or incrementing the nonce.'
|| e.message === 'Returned error: Transaction nonce is too low. Try incrementing the nonce.'
|| e.message === 'Returned error: nonce too low'
|| e.message === 'Returned error: replacement transaction underpriced') {
console.log('nonce too low, retrying')
if (retryAttempt <= 10) {
retryAttempt++
const newNonce = tx.nonce + 1
tx.nonce = newNonce
await redisClient.set('nonce', newNonce)
await redisClient.set('tx:' + newNonce, JSON.stringify(tx))
this.sendTx(tx, done, retryAttempt)
return
result
.once('transactionHash', (txHash) => {
console.log(`A new successfully sent tx ${txHash}`)
if (done) {
done(null, {
status: 200,
msg: { txHash }
})
}
}
if (done) {
done(null, {
status: 400,
msg: { error: 'Internal Relayer Error. Please use a different relayer service' }
})
}
})
})
.on('error', async (e) => {
console.log(`Error for tx with nonce ${tx.nonce}\n${e.message}`)
if (
e.message ===
'Returned error: Transaction gas price supplied is too low. There is another transaction with same nonce in the queue. Try increasing the gas price or incrementing the nonce.' ||
e.message === 'Returned error: Transaction nonce is too low. Try incrementing the nonce.' ||
e.message === 'Returned error: nonce too low' ||
e.message === 'Returned error: replacement transaction underpriced'
) {
console.log('nonce too low, retrying')
if (retryAttempt <= 10) {
retryAttempt++
const newNonce = tx.nonce + 1
tx.nonce = newNonce
await redisClient.set('nonce', newNonce)
await redisClient.set('tx:' + newNonce, JSON.stringify(tx))
this.sendTx(tx, done, retryAttempt)
return
}
}
if (done) {
done(null, {
status: 400,
msg: { error: 'Internal Relayer Error. Please use a different relayer service' }
})
}
})
}
}

4
src/setupWeb3.js
View File

@ -8,9 +8,9 @@ function setup() {
web3.eth.accounts.wallet.add('0x' + privateKey)
web3.eth.defaultAccount = account.address
return web3
} catch(e) {
} catch (e) {
console.error('web3 failed')
}
}
const web3 = setup()
module.exports = web3
module.exports = web3

74
src/utils.js
View File

@ -4,7 +4,7 @@ const { netId, mixers, relayerServiceFee } = require('../config')
function isValidProof(proof) {
// validator expects `websnarkUtils.toSolidityInput(proof)` output
if (!(proof)) {
if (!proof) {
return { valid: false, reason: 'The proof is empty.' }
}
@ -16,8 +16,7 @@ function isValidProof(proof) {
}
function isValidArgs(args) {
if (!(args)) {
if (!args) {
return { valid: false, reason: 'Args are empty' }
}
@ -25,18 +24,20 @@ function isValidArgs(args) {
return { valid: false, reason: 'Length of args is lower than 6' }
}
for(let signal of args) {
for (let signal of args) {
if (!isHexStrict(signal)) {
return { valid: false, reason: `Corrupted signal ${signal}` }
}
}
if (args[0].length !== 66 ||
args[1].length !== 66 ||
args[2].length !== 42 ||
args[3].length !== 42 ||
args[4].length !== 66 ||
args[5].length !== 66) {
if (
args[0].length !== 66 ||
args[1].length !== 66 ||
args[2].length !== 42 ||
args[3].length !== 42 ||
args[4].length !== 66 ||
args[5].length !== 66
) {
return { valid: false, reason: 'The length one of the signals is incorrect' }
}
@ -56,7 +57,7 @@ function isKnownContract(contract) {
}
function sleep(ms) {
return new Promise(resolve => setTimeout(resolve, ms))
return new Promise((resolve) => setTimeout(resolve, ms))
}
function fromDecimals(value, decimals) {
@ -77,9 +78,7 @@ function fromDecimals(value, decimals) {
// Split it into a whole and fractional part
const comps = ether.split('.')
if (comps.length > 2) {
throw new Error(
'[ethjs-unit] while converting number ' + value + ' to wei, too many decimal points'
)
throw new Error('[ethjs-unit] while converting number ' + value + ' to wei, too many decimal points')
}
let whole = comps[0]
@ -92,9 +91,7 @@ function fromDecimals(value, decimals) {
fraction = '0'
}
if (fraction.length > baseLength) {
throw new Error(
'[ethjs-unit] while converting number ' + value + ' to wei, too many decimal places'
)
throw new Error('[ethjs-unit] while converting number ' + value + ' to wei, too many decimal places')
}
while (fraction.length < baseLength) {
@ -114,9 +111,15 @@ function fromDecimals(value, decimals) {
function isEnoughFee({ gas, gasPrices, currency, amount, refund, ethPrices, fee }) {
const { decimals } = mixers[`netId${netId}`][currency]
const decimalsPoint = Math.floor(relayerServiceFee) === relayerServiceFee ? 0 : relayerServiceFee.toString().split('.')[1].length
const decimalsPoint =
Math.floor(relayerServiceFee) === relayerServiceFee
? 0
: relayerServiceFee.toString().split('.')[1].length
const roundDecimal = 10 ** decimalsPoint
const feePercent = toBN(fromDecimals(amount, decimals)).mul(toBN(relayerServiceFee * roundDecimal)).div(toBN(roundDecimal * 100))
const feePercent = toBN(fromDecimals(amount, decimals))
.mul(toBN(relayerServiceFee * roundDecimal))
.div(toBN(roundDecimal * 100))
const expense = toBN(toWei(gasPrices.fast.toString(), 'gwei')).mul(toBN(gas))
let desiredFee
switch (currency) {
@ -125,18 +128,23 @@ function isEnoughFee({ gas, gasPrices, currency, amount, refund, ethPrices, fee
break
}
default: {
desiredFee =
expense.add(refund)
.mul(toBN(10 ** decimals))
.div(toBN(ethPrices[currency]))
desiredFee = expense
.add(refund)
.mul(toBN(10 ** decimals))
.div(toBN(ethPrices[currency]))
desiredFee = desiredFee.add(feePercent)
break
}
}
console.log('sent fee, desired fee, feePercent', fee.toString(), desiredFee.toString(), feePercent.toString())
console.log(
'sent fee, desired fee, feePercent',
fee.toString(),
desiredFee.toString(),
feePercent.toString()
)
if (fee.lt(desiredFee)) {
return { isEnough: false, reason: 'Not enough fee' }
}
}
return { isEnough: true }
}
@ -148,11 +156,7 @@ function getArgsForOracle() {
Object.entries(tokens).map(([currency, data]) => {
if (currency !== 'eth') {
tokenAddresses.push(data.tokenAddress)
oneUintAmount.push(
toBN('10')
.pow(toBN(data.decimals.toString()))
.toString()
)
oneUintAmount.push(toBN('10').pow(toBN(data.decimals.toString())).toString())
currencyLookup[data.tokenAddress] = currency
}
})
@ -163,4 +167,12 @@ function getMixers() {
return mixers[`netId${netId}`]
}
module.exports = { isValidProof, isValidArgs, sleep, isKnownContract, isEnoughFee, getMixers, getArgsForOracle }
module.exports = {
isValidProof,
isValidArgs,
sleep,
isKnownContract,
isEnoughFee,
getMixers,
getArgsForOracle
}