tokenbridge/monitor/validators.js
2020-11-04 14:24:42 +03:00

185 lines
6.5 KiB
JavaScript

require('dotenv').config()
const Web3Utils = require('web3').utils
const fetch = require('node-fetch')
const logger = require('./logger')('validators')
const { getBridgeABIs, BRIDGE_VALIDATORS_ABI, gasPriceFromSupplier } = require('../commons')
const { web3Home, web3Foreign, getHomeBlockNumber, getForeignBlockNumber } = require('./utils/web3')
const { getValidatorList } = require('./utils/getValidatorsList')
const {
COMMON_HOME_BRIDGE_ADDRESS,
COMMON_FOREIGN_BRIDGE_ADDRESS,
COMMON_HOME_GAS_PRICE_SUPPLIER_URL,
COMMON_HOME_GAS_PRICE_SPEED_TYPE,
COMMON_HOME_GAS_PRICE_FALLBACK,
COMMON_HOME_GAS_PRICE_FACTOR,
COMMON_FOREIGN_GAS_PRICE_SUPPLIER_URL,
COMMON_FOREIGN_GAS_PRICE_SPEED_TYPE,
COMMON_FOREIGN_GAS_PRICE_FALLBACK,
COMMON_FOREIGN_GAS_PRICE_FACTOR
} = process.env
const MONITOR_VALIDATOR_HOME_TX_LIMIT = Number(process.env.MONITOR_VALIDATOR_HOME_TX_LIMIT) || 0
const MONITOR_VALIDATOR_FOREIGN_TX_LIMIT = Number(process.env.MONITOR_VALIDATOR_FOREIGN_TX_LIMIT) || 0
const homeGasPriceSupplierOpts = {
speedType: COMMON_HOME_GAS_PRICE_SPEED_TYPE,
factor: COMMON_HOME_GAS_PRICE_FACTOR,
logger
}
const foreignGasPriceSupplierOpts = {
speedType: COMMON_FOREIGN_GAS_PRICE_SPEED_TYPE,
factor: COMMON_FOREIGN_GAS_PRICE_FACTOR,
logger
}
const asyncForEach = async (array, callback) => {
for (let index = 0; index < array.length; index++) {
await callback(array[index], index, array)
}
}
async function main(bridgeMode) {
const { HOME_ABI, FOREIGN_ABI } = getBridgeABIs(bridgeMode)
const homeBridge = new web3Home.eth.Contract(HOME_ABI, COMMON_HOME_BRIDGE_ADDRESS)
const foreignBridge = new web3Foreign.eth.Contract(FOREIGN_ABI, COMMON_FOREIGN_BRIDGE_ADDRESS)
const homeValidatorsAddress = await homeBridge.methods.validatorContract().call()
const homeBridgeValidators = new web3Home.eth.Contract(BRIDGE_VALIDATORS_ABI, homeValidatorsAddress)
logger.debug('getting last block numbers')
const homeBlockNumber = await getHomeBlockNumber()
const foreignBlockNumber = await getForeignBlockNumber()
const homeConfirmations = await homeBridge.methods.requiredBlockConfirmations().call()
const foreignConfirmations = await foreignBridge.methods.requiredBlockConfirmations().call()
const homeDelayedBlockNumber = homeBlockNumber - homeConfirmations
const foreignDelayedBlockNumber = foreignBlockNumber - foreignConfirmations
logger.debug('calling foreignBridge.methods.validatorContract().call()')
const foreignValidatorsAddress = await foreignBridge.methods.validatorContract().call()
const foreignBridgeValidators = new web3Foreign.eth.Contract(BRIDGE_VALIDATORS_ABI, foreignValidatorsAddress)
logger.debug('calling foreignBridgeValidators getValidatorList()')
const foreignValidators = (await getValidatorList(foreignValidatorsAddress, web3Foreign.eth, {
toBlock: foreignBlockNumber,
logger,
chain: 'foreign',
safeToBlock: foreignDelayedBlockNumber
})).map(web3Foreign.utils.toChecksumAddress)
logger.debug('calling homeBridgeValidators getValidatorList()')
const homeValidators = (await getValidatorList(homeValidatorsAddress, web3Home.eth, {
toBlock: homeBlockNumber,
logger,
chain: 'home',
safeToBlock: homeDelayedBlockNumber
})).map(web3Home.utils.toChecksumAddress)
const foreignVBalances = {}
const homeVBalances = {}
let homeGasPrice
let homeGasPriceGwei
let homeTxCost
if (MONITOR_VALIDATOR_HOME_TX_LIMIT) {
logger.debug('calling home getGasPrices')
homeGasPrice =
(await gasPriceFromSupplier(() => fetch(COMMON_HOME_GAS_PRICE_SUPPLIER_URL), homeGasPriceSupplierOpts)) ||
Web3Utils.toBN(COMMON_HOME_GAS_PRICE_FALLBACK)
homeGasPriceGwei = Web3Utils.fromWei(homeGasPrice.toString(), 'gwei')
homeTxCost = homeGasPrice.mul(Web3Utils.toBN(MONITOR_VALIDATOR_HOME_TX_LIMIT))
}
let foreignGasPrice
let foreignGasPriceGwei
let foreignTxCost
if (MONITOR_VALIDATOR_FOREIGN_TX_LIMIT) {
logger.debug('calling foreign getGasPrices')
const fetchFn =
COMMON_FOREIGN_GAS_PRICE_SUPPLIER_URL === 'gas-price-oracle'
? null
: () => fetch(COMMON_FOREIGN_GAS_PRICE_SUPPLIER_URL)
foreignGasPrice =
(await gasPriceFromSupplier(fetchFn, foreignGasPriceSupplierOpts)) ||
Web3Utils.toBN(COMMON_FOREIGN_GAS_PRICE_FALLBACK)
foreignGasPriceGwei = Web3Utils.fromWei(foreignGasPrice.toString(), 'gwei')
foreignTxCost = foreignGasPrice.mul(Web3Utils.toBN(MONITOR_VALIDATOR_FOREIGN_TX_LIMIT))
}
let validatorsMatch = true
logger.debug('calling asyncForEach foreignValidators foreignVBalances')
await asyncForEach(foreignValidators, async v => {
const balance = await web3Foreign.eth.getBalance(v)
if (MONITOR_VALIDATOR_FOREIGN_TX_LIMIT) {
const leftTx = Web3Utils.toBN(balance)
.div(foreignTxCost)
.toString(10)
foreignVBalances[v] = {
balance: Web3Utils.fromWei(balance),
leftTx: Number(leftTx),
gasPrice: Number(foreignGasPriceGwei)
}
} else {
foreignVBalances[v] = {
balance: Web3Utils.fromWei(balance)
}
}
if (!homeValidators.includes(v)) {
validatorsMatch = false
foreignVBalances[v].onlyOnForeign = true
}
})
logger.debug('calling asyncForEach homeValidators homeVBalances')
await asyncForEach(homeValidators, async v => {
const balance = await web3Home.eth.getBalance(v)
if (MONITOR_VALIDATOR_HOME_TX_LIMIT) {
const leftTx = Web3Utils.toBN(balance)
.div(homeTxCost)
.toString(10)
homeVBalances[v] = {
balance: Web3Utils.fromWei(balance),
leftTx: Number(leftTx),
gasPrice: Number(homeGasPriceGwei)
}
} else {
homeVBalances[v] = {
balance: Web3Utils.fromWei(balance)
}
}
if (!foreignValidators.includes(v)) {
validatorsMatch = false
homeVBalances[v].onlyOnHome = true
}
})
logger.debug('calling homeBridgeValidators.methods.requiredSignatures().call()')
const reqSigHome = await homeBridgeValidators.methods.requiredSignatures().call()
logger.debug('calling foreignBridgeValidators.methods.requiredSignatures().call()')
const reqSigForeign = await foreignBridgeValidators.methods.requiredSignatures().call()
logger.debug('Done')
return {
home: {
validators: {
...homeVBalances
},
requiredSignatures: Number(reqSigHome)
},
foreign: {
validators: {
...foreignVBalances
},
requiredSignatures: Number(reqSigForeign)
},
requiredSignaturesMatch: reqSigHome === reqSigForeign,
validatorsMatch,
lastChecked: Math.floor(Date.now() / 1000)
}
}
module.exports = main