classic-ui/updateTree.js

184 lines
4.8 KiB
JavaScript
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2022-04-22 06:05:56 +03:00
const fs = require('fs')
const Jszip = require('jszip')
const zipper = require('zip-local')
const BloomFilter = require('bloomfilter.js')
const jszip = new Jszip()
const EVENTS = ['deposit']
const { MerkleTree } = require('fixed-merkle-tree')
const { buildMimcSponge } = require('circomlibjs')
const networkConfig = require('./networkConfig')
const treesPath = './static/trees/'
const eventsPath = './static/events/'
let mimcHash
const trees = {
PARTS_COUNT: 4,
LEVELS: 20 // const from contract
}
function getName({ path, type, instance, format = '.json', currName = 'eth' }) {
return `${path}${type.toLowerCase()}s_${currName}_${instance}${format}`
}
const TREES_FOLDER = 'static/trees'
function createTreeZip(netId) {
try {
const config = networkConfig[`netId${netId}`]
const { instanceAddress: CONTRACTS } = config.tokens.eth
for (const type of EVENTS) {
for (const [instance] of Object.entries(CONTRACTS)) {
const baseFilename = getName({
type,
instance,
format: '',
path: treesPath,
currName: config.currencyName.toLowerCase()
})
const treesFolder = fs.readdirSync(TREES_FOLDER)
treesFolder.forEach((fileName) => {
fileName = `${treesPath}${fileName}`
const isInstanceFile = !fileName.includes('.zip') && fileName.includes(baseFilename)
if (isInstanceFile) {
zipper.sync
.zip(`${fileName}`)
.compress()
.save(`${fileName}.zip`)
fs.unlinkSync(fileName)
}
})
}
}
} catch {}
}
async function createTree(netId) {
try {
const config = networkConfig[`netId${netId}`]
const currName = config.currencyName.toLowerCase()
const { instanceAddress: CONTRACTS } = config.tokens.eth
for (const type of EVENTS) {
for (const [instance] of Object.entries(CONTRACTS)) {
const filePath = getName({
type,
instance,
currName,
format: '',
path: treesPath
})
console.log('createTree', { type, instance })
const events = await loadCachedEvents({ type, amount: instance, currName })
console.log('events', events.length)
const bloom = new BloomFilter(events.length) // to reduce the number of false positives
const eventsData = events.reduce(
(acc, { leafIndex, commitment, ...rest }, i) => {
if (leafIndex !== i) {
throw new Error('leafIndex !== i', i, leafIndex)
}
const leave = commitment.toString()
acc.leaves.push(leave)
acc.metadata[leave] = { ...rest, leafIndex }
return acc
},
{ leaves: [], metadata: {} }
)
console.log('leaves', eventsData.leaves.length)
const tree = new MerkleTree(trees.LEVELS, eventsData.leaves, {
zeroElement: '21663839004416932945382355908790599225266501822907911457504978515578255421292',
hashFunction: mimcHash
})
const slices = tree.getTreeSlices(trees.PARTS_COUNT) // [edge(PARTS_COUNT)]
slices.forEach((slice, index) => {
slice.metadata = slice.elements.reduce((acc, curr) => {
if (index < trees.PARTS_COUNT - 1) {
bloom.add(curr)
}
acc.push(eventsData.metadata[curr])
return acc
}, [])
const sliceJson = JSON.stringify(slice, null, 2) + '\n'
fs.writeFileSync(`${filePath}_slice${index + 1}.json`, sliceJson)
})
const bloomCache = bloom.serialize()
fs.writeFileSync(`${filePath}_bloom.json`, bloomCache)
}
}
} catch (e) {
console.log(e.message)
}
}
async function download({ name, contentType }) {
const path = `${name}.zip`
const data = fs.readFileSync(path)
const zip = await jszip.loadAsync(data)
const file = zip.file(
path
.replace(eventsPath, '')
.slice(0, -4)
.toLowerCase()
)
const content = await file.async(contentType)
return content
}
async function loadCachedEvents({ type, amount, currName = 'eth', path = '' }) {
try {
const module = await download({
contentType: 'string',
name: path || getName({ path: eventsPath, type, instance: amount, currName })
})
if (module) {
return JSON.parse(module)
}
} catch (err) {
throw new Error(`Method loadCachedEvents has error: ${err.message}`)
}
}
async function initMimc() {
const mimcSponge = await buildMimcSponge()
mimcHash = (left, right) => mimcSponge.F.toString(mimcSponge.multiHash([BigInt(left), BigInt(right)]))
}
async function main() {
await initMimc()
const NETWORKS = [1]
for await (const netId of NETWORKS) {
await createTree(netId)
await createTreeZip(netId)
}
}
main()