251 lines
10 KiB
JavaScript
251 lines
10 KiB
JavaScript
require('dotenv').config()
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const logger = require('../logger')('eventsUtils')
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const {
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BRIDGE_MODES,
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ERC_TYPES,
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getBridgeABIs,
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getBridgeMode,
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HOME_ERC_TO_ERC_ABI,
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ERC20_ABI,
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ERC677_BRIDGE_TOKEN_ABI,
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getTokenType,
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ZERO_ADDRESS,
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OLD_AMB_USER_REQUEST_FOR_SIGNATURE_ABI,
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OLD_AMB_USER_REQUEST_FOR_AFFIRMATION_ABI
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} = require('../../commons')
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const { normalizeEventInformation } = require('./message')
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const { filterTransferBeforeES } = require('./tokenUtils')
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const { writeFile, readCacheFile } = require('./file')
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const { web3Home, web3Foreign, getHomeBlockNumber, getForeignBlockNumber } = require('./web3')
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const { getPastEvents } = require('./web3Cache')
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const { COMMON_HOME_BRIDGE_ADDRESS, COMMON_FOREIGN_BRIDGE_ADDRESS, MONITOR_CACHE_EVENTS } = process.env
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const MONITOR_HOME_START_BLOCK = Number(process.env.MONITOR_HOME_START_BLOCK) || 0
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const MONITOR_FOREIGN_START_BLOCK = Number(process.env.MONITOR_FOREIGN_START_BLOCK) || 0
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const cacheFilePath = '/tmp/cachedEvents.json'
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async function main(mode) {
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if (MONITOR_CACHE_EVENTS === 'true') {
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logger.debug('checking existing events cache')
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const cachedEvents = readCacheFile(cacheFilePath)
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if (cachedEvents !== false) {
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logger.debug('returning events stored in cache')
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return cachedEvents
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}
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}
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const homeErcBridge = new web3Home.eth.Contract(HOME_ERC_TO_ERC_ABI, COMMON_HOME_BRIDGE_ADDRESS)
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const bridgeMode = mode || (await getBridgeMode(homeErcBridge))
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const { HOME_ABI, FOREIGN_ABI } = getBridgeABIs(bridgeMode)
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const homeBridge = new web3Home.eth.Contract(HOME_ABI, COMMON_HOME_BRIDGE_ADDRESS)
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const foreignBridge = new web3Foreign.eth.Contract(FOREIGN_ABI, COMMON_FOREIGN_BRIDGE_ADDRESS)
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const v1Bridge = bridgeMode === BRIDGE_MODES.NATIVE_TO_ERC_V1
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let isExternalErc20
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let erc20Contract
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let erc20Address
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let normalizeEvent = normalizeEventInformation
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if (bridgeMode !== BRIDGE_MODES.ARBITRARY_MESSAGE) {
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const erc20MethodName = bridgeMode === BRIDGE_MODES.NATIVE_TO_ERC || v1Bridge ? 'erc677token' : 'erc20token'
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erc20Address = await foreignBridge.methods[erc20MethodName]().call()
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const tokenType = await getTokenType(
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new web3Foreign.eth.Contract(ERC677_BRIDGE_TOKEN_ABI, erc20Address),
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COMMON_FOREIGN_BRIDGE_ADDRESS
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)
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isExternalErc20 = tokenType === ERC_TYPES.ERC20
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erc20Contract = new web3Foreign.eth.Contract(ERC20_ABI, erc20Address)
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} else {
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normalizeEvent = e => e
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}
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logger.debug('getting last block numbers')
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const homeBlockNumber = await getHomeBlockNumber()
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const foreignBlockNumber = await getForeignBlockNumber()
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const homeConfirmations = await homeBridge.methods.requiredBlockConfirmations().call()
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const foreignConfirmations = await foreignBridge.methods.requiredBlockConfirmations().call()
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const homeDelayedBlockNumber = homeBlockNumber - homeConfirmations
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const foreignDelayedBlockNumber = foreignBlockNumber - foreignConfirmations
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let homeToForeignRequests = []
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let foreignToHomeRequests = []
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let homeMigrationBlock = MONITOR_HOME_START_BLOCK
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let foreignMigrationBlock = MONITOR_FOREIGN_START_BLOCK
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if (bridgeMode === BRIDGE_MODES.ARBITRARY_MESSAGE) {
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const oldHomeBridge = new web3Home.eth.Contract(OLD_AMB_USER_REQUEST_FOR_SIGNATURE_ABI, COMMON_HOME_BRIDGE_ADDRESS)
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const oldForeignBridge = new web3Foreign.eth.Contract(
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OLD_AMB_USER_REQUEST_FOR_AFFIRMATION_ABI,
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COMMON_FOREIGN_BRIDGE_ADDRESS
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)
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logger.debug("calling oldHomeBridge.getPastEvents('UserRequestForSignature(bytes)')")
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homeToForeignRequests = (await getPastEvents(oldHomeBridge, {
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event: 'UserRequestForSignature',
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fromBlock: MONITOR_HOME_START_BLOCK,
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toBlock: homeDelayedBlockNumber,
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chain: 'home'
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})).map(normalizeEvent)
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logger.debug(`found ${homeToForeignRequests.length} events`)
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if (homeToForeignRequests.length > 0) {
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homeMigrationBlock = Math.max(...homeToForeignRequests.map(x => x.blockNumber))
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}
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logger.debug("calling oldForeignBridge.getPastEvents('UserRequestForAffirmation(bytes)')")
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foreignToHomeRequests = (await getPastEvents(oldForeignBridge, {
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event: 'UserRequestForAffirmation',
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fromBlock: MONITOR_FOREIGN_START_BLOCK,
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toBlock: foreignDelayedBlockNumber,
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chain: 'foreign'
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})).map(normalizeEvent)
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logger.debug(`found ${foreignToHomeRequests.length} events`)
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if (foreignToHomeRequests.length > 0) {
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foreignMigrationBlock = Math.max(...foreignToHomeRequests.map(x => x.blockNumber))
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}
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}
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logger.debug("calling homeBridge.getPastEvents('UserRequestForSignature')")
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const homeToForeignRequestsNew = (await getPastEvents(homeBridge, {
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event: v1Bridge ? 'Deposit' : 'UserRequestForSignature',
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fromBlock: homeMigrationBlock,
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toBlock: homeDelayedBlockNumber,
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chain: 'home'
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})).map(normalizeEvent)
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homeToForeignRequests = [...homeToForeignRequests, ...homeToForeignRequestsNew]
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logger.debug("calling foreignBridge.getPastEvents('RelayedMessage')")
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const homeToForeignConfirmations = (await getPastEvents(foreignBridge, {
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event: v1Bridge ? 'Deposit' : 'RelayedMessage',
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fromBlock: MONITOR_FOREIGN_START_BLOCK,
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toBlock: foreignBlockNumber,
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chain: 'foreign',
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safeToBlock: foreignDelayedBlockNumber
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})).map(normalizeEvent)
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logger.debug("calling homeBridge.getPastEvents('AffirmationCompleted')")
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const foreignToHomeConfirmations = (await getPastEvents(homeBridge, {
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event: v1Bridge ? 'Withdraw' : 'AffirmationCompleted',
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fromBlock: MONITOR_HOME_START_BLOCK,
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toBlock: homeBlockNumber,
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chain: 'home',
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safeToBlock: homeDelayedBlockNumber
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})).map(normalizeEvent)
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logger.debug("calling foreignBridge.getPastEvents('UserRequestForAffirmation')")
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const foreignToHomeRequestsNew = (await getPastEvents(foreignBridge, {
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event: v1Bridge ? 'Withdraw' : 'UserRequestForAffirmation',
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fromBlock: foreignMigrationBlock,
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toBlock: foreignDelayedBlockNumber,
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chain: 'foreign'
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})).map(normalizeEvent)
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foreignToHomeRequests = [...foreignToHomeRequests, ...foreignToHomeRequestsNew]
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if (isExternalErc20) {
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logger.debug("calling erc20Contract.getPastEvents('Transfer')")
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let transferEvents = (await getPastEvents(erc20Contract, {
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event: 'Transfer',
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fromBlock: MONITOR_FOREIGN_START_BLOCK,
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toBlock: foreignDelayedBlockNumber,
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options: {
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filter: { to: COMMON_FOREIGN_BRIDGE_ADDRESS }
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},
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chain: 'foreign'
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})).map(normalizeEvent)
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let directTransfers = transferEvents
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const tokensSwappedAbiExists = FOREIGN_ABI.filter(e => e.type === 'event' && e.name === 'TokensSwapped')[0]
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if (tokensSwappedAbiExists) {
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logger.debug('collecting half duplex tokens participated in the bridge balance')
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logger.debug("calling foreignBridge.getPastEvents('TokensSwapped')")
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const tokensSwappedEvents = await getPastEvents(foreignBridge, {
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event: 'TokensSwapped',
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fromBlock: MONITOR_FOREIGN_START_BLOCK,
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toBlock: foreignBlockNumber,
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chain: 'foreign',
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safeToBlock: foreignDelayedBlockNumber
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})
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// Get token swap events emitted by foreign bridge
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const bridgeTokensSwappedEvents = tokensSwappedEvents.filter(e => e.address === COMMON_FOREIGN_BRIDGE_ADDRESS)
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// Get transfer events for each previous erc20
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const uniqueTokenAddressesSet = new Set(bridgeTokensSwappedEvents.map(e => e.returnValues.from))
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// Exclude chai token from previous erc20
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try {
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logger.debug('calling foreignBridge.chaiToken() to remove it from half duplex tokens list')
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const chaiToken = await foreignBridge.methods.chaiToken().call()
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uniqueTokenAddressesSet.delete(chaiToken)
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} catch (e) {
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logger.debug('call to foreignBridge.chaiToken() failed')
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}
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// Exclude dai token from previous erc20
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try {
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logger.debug('calling foreignBridge.erc20token() to remove it from half duplex tokens list')
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const daiToken = await foreignBridge.methods.erc20token().call()
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uniqueTokenAddressesSet.delete(daiToken)
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} catch (e) {
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logger.debug('call to foreignBridge.erc20token() failed')
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}
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const uniqueTokenAddresses = [...uniqueTokenAddressesSet]
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await Promise.all(
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uniqueTokenAddresses.map(async tokenAddress => {
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const halfDuplexTokenContract = new web3Foreign.eth.Contract(ERC20_ABI, tokenAddress)
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logger.debug('Half duplex token:', tokenAddress)
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logger.debug("calling halfDuplexTokenContract.getPastEvents('Transfer')")
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const halfDuplexTransferEvents = (await getPastEvents(halfDuplexTokenContract, {
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event: 'Transfer',
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fromBlock: MONITOR_FOREIGN_START_BLOCK,
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toBlock: foreignDelayedBlockNumber,
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options: {
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filter: { to: COMMON_FOREIGN_BRIDGE_ADDRESS }
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},
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chain: 'foreign'
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})).map(normalizeEvent)
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// Remove events after the ES
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logger.debug('filtering half duplex transfers happened before ES')
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const validHalfDuplexTransfers = await filterTransferBeforeES(halfDuplexTransferEvents)
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transferEvents = [...validHalfDuplexTransfers, ...transferEvents]
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})
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)
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// filter transfer that is part of a token swap
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directTransfers = transferEvents.filter(
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e =>
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bridgeTokensSwappedEvents.findIndex(
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t => t.transactionHash === e.referenceTx && e.recipient === ZERO_ADDRESS
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) === -1
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)
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}
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// Get transfer events that didn't have a UserRequestForAffirmation event in the same transaction
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directTransfers = directTransfers.filter(
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e => foreignToHomeRequests.findIndex(t => t.referenceTx === e.referenceTx) === -1
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)
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foreignToHomeRequests = [...foreignToHomeRequests, ...directTransfers]
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}
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logger.debug('Done')
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const result = {
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homeToForeignRequests,
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homeToForeignConfirmations,
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foreignToHomeConfirmations,
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foreignToHomeRequests,
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isExternalErc20,
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bridgeMode,
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homeDelayedBlockNumber,
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foreignDelayedBlockNumber
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}
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if (MONITOR_CACHE_EVENTS === 'true') {
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logger.debug('saving obtained events into cache file')
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writeFile(cacheFilePath, result, false)
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}
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return result
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}
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module.exports = main
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