125 lines
3.9 KiB
JavaScript
125 lines
3.9 KiB
JavaScript
const MerkleTree = require('fixed-merkle-tree')
|
|
const { redisUrl, wsRpcUrl, minerMerkleTreeHeight, torn } = require('./config')
|
|
const { poseidonHash2 } = require('./utils')
|
|
const { toBN } = require('web3-utils')
|
|
const Redis = require('ioredis')
|
|
const redis = new Redis(redisUrl)
|
|
const ENSResolver = require('./resolver')
|
|
const resolver = new ENSResolver()
|
|
const Web3 = require('web3')
|
|
const web3 = new Web3(
|
|
new Web3.providers.WebsocketProvider(wsRpcUrl, {
|
|
clientConfig: {
|
|
maxReceivedFrameSize: 100000000,
|
|
maxReceivedMessageSize: 100000000,
|
|
},
|
|
}),
|
|
)
|
|
const MinerABI = require('../abis/mining.abi.json')
|
|
let contract
|
|
|
|
let tree, eventSubscription, blockSubscription
|
|
|
|
// todo handle the situation when we have two rewards in one block
|
|
async function fetchEvents(from = 0, to = 'latest') {
|
|
try {
|
|
const events = await contract.getPastEvents('NewAccount', {
|
|
fromBlock: from,
|
|
toBlock: to,
|
|
})
|
|
return events
|
|
.sort((a, b) => a.returnValues.index - b.returnValues.index)
|
|
.map(e => toBN(e.returnValues.commitment))
|
|
} catch (e) {
|
|
console.error('error fetching events', e)
|
|
}
|
|
}
|
|
|
|
async function processNewEvent(err, event) {
|
|
if (err) {
|
|
throw new Error(`Event handler error: ${err}`)
|
|
// console.error(err)
|
|
// return
|
|
}
|
|
|
|
console.log(
|
|
`New account event
|
|
Index: ${event.returnValues.index}
|
|
Commitment: ${event.returnValues.commitment}
|
|
Nullifier: ${event.returnValues.nullifier}
|
|
EncAcc: ${event.returnValues.encryptedAccount}`,
|
|
)
|
|
const { commitment, index } = event.returnValues
|
|
if (tree.elements().length === Number(index)) {
|
|
tree.insert(toBN(commitment))
|
|
await updateRedis()
|
|
} else if (tree.elements().length === Number(index) + 1) {
|
|
console.log('Replacing element', index)
|
|
tree.update(index, toBN(commitment))
|
|
await updateRedis()
|
|
} else {
|
|
console.log(`Invalid element index ${index}, rebuilding tree`)
|
|
rebuild()
|
|
}
|
|
}
|
|
|
|
async function processNewBlock(err) {
|
|
if (err) {
|
|
throw new Error(`Event handler error: ${err}`)
|
|
// console.error(err)
|
|
// return
|
|
}
|
|
// what if updateRedis takes more than 15 sec?
|
|
await updateRedis()
|
|
}
|
|
|
|
async function updateRedis() {
|
|
const rootOnContract = await contract.methods.getLastAccountRoot().call()
|
|
if (!tree.root().eq(toBN(rootOnContract))) {
|
|
console.log(`Invalid tree root: ${tree.root()} != ${toBN(rootOnContract)}, rebuilding tree`)
|
|
rebuild()
|
|
return
|
|
}
|
|
const rootInRedis = await redis.get('tree:root')
|
|
if (!rootInRedis || !tree.root().eq(toBN(rootInRedis))) {
|
|
const serializedTree = JSON.stringify(tree.serialize())
|
|
await redis.set('tree:elements', serializedTree)
|
|
await redis.set('tree:root', tree.root().toString())
|
|
await redis.publish('treeUpdate', tree.root().toString())
|
|
console.log('Updated tree in redis, new root:', tree.root().toString())
|
|
} else {
|
|
console.log('Tree in redis is up to date, skipping update')
|
|
}
|
|
}
|
|
|
|
function rebuild() {
|
|
process.exit(1)
|
|
// await eventSubscription.unsubscribe()
|
|
// await blockSubscription.unsubscribe()
|
|
// setTimeout(init, 3000)
|
|
}
|
|
|
|
async function init() {
|
|
try {
|
|
console.log('Initializing')
|
|
const miner = await resolver.resolve(torn.miningV2.address)
|
|
contract = new web3.eth.Contract(MinerABI, miner)
|
|
const block = await web3.eth.getBlockNumber()
|
|
const events = await fetchEvents(0, block)
|
|
tree = new MerkleTree(minerMerkleTreeHeight, events, { hashFunction: poseidonHash2 })
|
|
await updateRedis()
|
|
console.log(`Rebuilt tree with ${events.length} elements, root: ${tree.root()}`)
|
|
eventSubscription = contract.events.NewAccount({ fromBlock: block + 1 }, processNewEvent)
|
|
blockSubscription = web3.eth.subscribe('newBlockHeaders', processNewBlock)
|
|
} catch (e) {
|
|
console.error('error on init treeWatcher', e.message)
|
|
}
|
|
}
|
|
|
|
init()
|
|
|
|
process.on('unhandledRejection', error => {
|
|
console.error('Unhandled promise rejection', error)
|
|
process.exit(1)
|
|
})
|