import 'dotenv/config' import fs from 'fs' import BloomFilter from 'bloomfilter.js' import { MerkleTree } from 'fixed-merkle-tree' import { buildMimcSponge } from 'circomlibjs' import networkConfig, { enabledChains } from '../networkConfig' import { loadCachedEvents, save } from './helpers' const TREES_FOLDER = 'static/trees' const TREES_PATH = './static/trees/' const EVENTS_PATH = './static/events/' const EVENTS = ['deposit'] let mimcHash const trees = { PARTS_COUNT: 4, LEVELS: 20 // const from contract } function getName({ path, type, netId, instance, format = '.json', currName = 'eth' }) { return `${path}${type.toLowerCase()}s_${netId}_${currName}_${instance}${format}` } function createTreeZip(netId) { try { const { tokens, nativeCurrency, currencyName } = networkConfig[`netId${netId}`] const CONTRACTS = tokens[nativeCurrency].instanceAddress for (const type of EVENTS) { for (const [instance] of Object.entries(CONTRACTS)) { const baseFilename = getName({ type, instance, netId, format: '', path: TREES_PATH, currName: currencyName.toLowerCase() }) const treesFolder = fs.readdirSync(TREES_FOLDER) treesFolder.forEach((fileName) => { fileName = `${TREES_PATH}${fileName}` const isInstanceFile = !fileName.includes('.gz') && fileName.includes(baseFilename) if (isInstanceFile) { save(fileName) } }) } } } catch {} } async function createTree(netId) { try { const config = networkConfig[`netId${netId}`] const { nativeCurrency, currencyName, deployedBlock } = config const CONTRACTS = config.tokens[nativeCurrency].instanceAddress for (const type of EVENTS) { for (const [instance] of Object.entries(CONTRACTS)) { const filePath = getName({ type, instance, netId, format: '', path: TREES_PATH, currName: currencyName.toLowerCase() }) console.log('createTree', { type, instance }) const { events } = loadCachedEvents({ name: `${type}s_${netId}_${nativeCurrency}_${instance}.json`, directory: EVENTS_PATH, deployedBlock }) 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 (${leafIndex}) !== i (${i})`) } 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.error(e.message) } } async function initMimc() { const mimcSponge = await buildMimcSponge() mimcHash = (left, right) => mimcSponge.F.toString(mimcSponge.multiHash([BigInt(left), BigInt(right)])) } async function main() { const [, , , chain] = process.argv if (!enabledChains.includes(chain)) { throw new Error(`Supported chain ids ${enabledChains.join(', ')}`) } await initMimc() await createTree(chain) createTreeZip(chain) } main()