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robust wait loop for tx manager

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poma 2020-10-01 02:23:31 +03:00
parent c16164876e
commit 14272e8305
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GPG Key ID: BA20CB01FE165657
4 changed files with 231 additions and 110 deletions
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3
package.json
View File

@ -25,7 +25,8 @@
"uuid": "^8.3.0",
"web3": "^1.3.0",
"web3-core-promievent": "^1.3.0",
"web3-utils": "^1.2.2"
"web3-utils": "^1.2.2",
"why-is-node-running": "^2.2.0"
},
"devDependencies": {
"chai": "^4.2.0",

283
src/TxManager.js
View File

@ -13,6 +13,11 @@ const nonceErrors = [
const gasPriceErrors = [
'Returned error: Transaction gas price supplied is too low. There is another transaction with same nonce in the queue. Try increasing the gas price or incrementing the nonce.',
'Returned error: replacement transaction underpriced',
/Returned error: Transaction gas price \d+wei is too low. There is another transaction with same nonce in the queue with gas price: \d+wei. Try increasing the gas price or incrementing the nonce./,
]
const sameTxErrors = [
'Returned error: Transaction with the same hash was already imported.',
]
const defaultConfig = {
@ -36,7 +41,7 @@ class TxManager {
this._web3.eth.defaultAccount = this.address
this._gasPriceOracle = new GasPriceOracle({ defaultRpc: rpcUrl })
this._mutex = new Mutex()
this.nonce
this._nonce = null
}
/**
@ -44,17 +49,8 @@ class TxManager {
*
* @param tx Transaction to send
*/
async createTx(tx) {
try {
await this._mutex.acquire()
if (!this.nonce) {
this.nonce = await this._web3.eth.getTransactionCount(this.address, 'latest')
}
return new Transaction(tx, this)
} catch (e) {
console.log('e', e)
this._mutex.release()
}
createTx(tx) {
return new Transaction(tx, this)
}
}
@ -63,124 +59,209 @@ class Transaction {
Object.assign(this, manager)
this.manager = manager
this.tx = tx
this.promiReceipt = PromiEvent()
this.emitter = this.promiReceipt.eventEmitter
this._promise = PromiEvent()
this._emitter = this._promise.eventEmitter
this.executed = false
this.retries = 0
this.currentTxHash = null
// store all submitted hashes to catch cases when an old tx is mined
// todo: what to do if old tx with the same nonce was submitted
// by other client and we don't have its hash?
this.hashes = []
}
/**
* Submits transaction to Ethereum network. Resolves when tx gets enough confirmations.
* Submits the transaction to Ethereum network. Resolves when tx gets enough confirmations.
* Emits progress events.
*/
send() {
this._prepare()
.then(() => {
this._send()
.then((result) => this.promiReceipt.resolve(result))
.catch((e) => this.promiReceipt.reject(e))
})
.catch((e) => this.promiReceipt.reject(e))
.finally(this.manager._mutex.release())
return this.emitter
if (this.executed) {
throw new Error('The transaction was already executed')
}
this.executed = true
this._execute()
.then(this._promise.resolve)
.catch(this._promise.reject)
return this._emitter
}
/**
* Replaces pending tx.
* Replaces a pending tx.
*
* @param tx Transaction to send
*/
replace(tx) {
// todo check if it's not mined yet
console.log('Replacing...')
async replace(tx) {
// todo throw error if the current transaction is mined already
console.log('Replacing current transaction')
if (!this.executed) {
// Tx was not executed yet, just replace it
this.tx = tx
return
}
if (!tx.gas) {
tx.gas = await this._web3.eth.estimateGas(tx)
}
tx.nonce = this.tx.nonce // can be different from `this.manager._nonce`
tx.gasPrice = Math.max(this.tx.gasPrice, tx.gasPrice || 0) // start no less than current tx gas price
this.tx = tx
return this.send()
this._increaseGasPrice()
await this._send()
}
/**
* Cancels pending tx.
* Cancels a pending tx.
*/
cancel() {
// todo check if it's not mined yet
console.log('Canceling...')
this.tx = {
console.log('Canceling the transaction')
return this.replace({
from: this.address,
to: this.address,
gasPrice: this.tx.gasPrice,
}
this._increaseGasPrice()
return this.send()
value: 0,
gas: 21000,
})
}
/**
* Executes the transaction. Acquires global mutex for transaction duration
*
* @returns {Promise<TransactionReceipt>}
* @private
*/
async _execute() {
const release = await this.manager._mutex.acquire()
try {
await this._prepare()
await this._send()
const receipt = this._waitForConfirmations()
// we could have bumped nonce during execution, so get the latest one + 1
this.manager._nonce = this.tx.nonce + 1
return receipt
} finally {
release()
}
}
/**
* Prepare first transaction before submitting it. Inits `gas`, `gasPrice`, `nonce`
*
* @returns {Promise<void>}
* @private
*/
async _prepare() {
this.tx.gas = await this._web3.eth.estimateGas(this.tx)
const gas = await this._web3.eth.estimateGas(this.tx)
if (!this.tx.gas) {
this.tx.gas = gas
}
if (!this.tx.gasPrice) {
this.tx.gasPrice = await this._getGasPrice('fast')
}
this.tx.nonce = this.manager.nonce
if (!this.manager._nonce) {
this.manager._nonce = await this._web3.eth.getTransactionCount(this.address, 'latest')
}
this.tx.nonce = this.manager._nonce
}
/**
* Send the current transaction
*
* @returns {Promise}
* @private
*/
async _send() {
// todo throw is we attempt to send a tx that attempts to replace already mined tx
const signedTx = await this._web3.eth.accounts.signTransaction(this.tx, this._privateKey)
this.tx.date = Date.now()
this.submitTimestamp = Date.now()
this.tx.hash = signedTx.transactionHash
this.hashes.push(this.tx.hash)
this.emitter.emit('transactionHash', signedTx.transactionHash)
this.hashes.push(signedTx.transactionHash)
try {
await this._broadcast(signedTx.rawTransaction)
console.log('Broadcasted. Start waiting for mining...')
// The most reliable way to see if one of our tx was mined is to track current nonce
} catch (e) {
return this._handleSendError(e)
}
while (this.tx.nonce >= (await this._getLastNonce())) {
if (Date.now() - this.tx.date >= this.config.GAS_BUMP_INTERVAL) {
if (this._increaseGasPrice()) {
console.log('Resubmit with higher gas price')
return this._send()
}
this._emitter.emit('transactionHash', signedTx.transactionHash)
console.log(`Broadcasted transaction ${signedTx.transactionHash}`)
console.log(this.tx)
}
/**
* A loop that waits until the current transaction is mined and gets enough confirmations
*
* @returns {Promise<TransactionReceipt>} The transaction receipt
* @private
*/
async _waitForConfirmations() {
// eslint-disable-next-line no-constant-condition
while (true) {
// We are already waiting on certain tx hash
if (this.currentTxHash) {
const receipt = await this._web3.eth.getTransactionReceipt(this.currentTxHash)
if (!receipt) {
// We were waiting for some tx but it disappeared
// Erase the hash and start over
this.currentTxHash = null
continue
}
const currentBlock = await this._web3.eth.getBlockNumber()
const confirmations = Math.max(0, currentBlock - receipt.blockNumber)
// todo don't emit repeating confirmation count
this._emitter.emit('confirmations', confirmations)
if (confirmations >= this.config.CONFIRMATIONS) {
// Tx is mined and has enough confirmations
return receipt
}
// Tx is mined but doesn't have enough confirmations yet, keep waiting
await sleep(this.config.POLL_INTERVAL)
continue
}
// Tx is still pending
if (await this._getLastNonce() <= this.tx.nonce) {
// todo optionally run estimateGas on each iteration and cancel the transaction if it fails
// We were waiting too long, increase gas price and resubmit
if (Date.now() - this.submitTimestamp >= this.config.GAS_BUMP_INTERVAL) {
if (this._increaseGasPrice()) {
console.log('Resubmitting with higher gas price')
await this._send()
continue
}
}
// Tx is still pending, keep waiting
await sleep(this.config.POLL_INTERVAL)
continue
}
let receipt = await this._getReceipts()
let retryAttempt = 5
while (retryAttempt >= 0 && !receipt) {
await sleep(1000)
receipt = await this._getReceipts()
retryAttempt--
}
// There is a mined tx with current nonce, but it's not one of ours
// Probably other tx submitted by other process/client
if (!receipt) {
// resubmit
console.log('Can\'t find our transaction receipt, retrying a few times')
// Give node a few more attempts to respond with our receipt
let retries = 5
while (!receipt && retries--) {
await sleep(1000)
receipt = await this._getReceipts()
}
// Receipt was not found after a few retries
// Resubmit our tx
if (!receipt) {
console.log('There is a mined tx with our nonce but unknown tx hash, resubmitting with tx with increased nonce')
this.tx.nonce++
// todo drop gas price to original value?
await this._send()
continue
}
}
console.log('Mined. Start waiting for confirmations...')
this.emitter.emit('mined', receipt)
let currentBlock = await this._web3.eth.getBlockNumber()
let confirmations = currentBlock > receipt.blockNumber ? currentBlock - receipt.blockNumber : 0
while (confirmations <= this.config.CONFIRMATIONS) {
this.emitter.emit('confirmations', confirmations)
await sleep(this.config.POLL_INTERVAL)
receipt = await this._getReceipts()
if (!receipt) {
// resubmit
}
currentBlock = await this._web3.eth.getBlockNumber()
confirmations = currentBlock - receipt.blockNumber
}
// we could have bumped nonce during execution, so get the latest one + 1
this.manager.nonce = this.tx.nonce + 1
return receipt
} catch (e) {
console.log('_send', e)
await this._handleSendError()
this._emitter.emit('mined', receipt)
this.currentTxHash = receipt.transactionHash
}
}
@ -213,7 +294,7 @@ class Transaction {
console.log('Got error', e)
// nonce is too low, trying to increase and resubmit
if (nonceErrors.includes(e.message)) {
if (this._hasError(e.message, nonceErrors)) {
console.log(`Nonce ${this.tx.nonce} is too low, increasing and retrying`)
if (this.retries <= this.config.MAX_RETRIES) {
this.tx.nonce++
@ -223,11 +304,28 @@ class Transaction {
}
// there is already a pending tx with higher gas price, trying to bump and resubmit
if (gasPriceErrors.includes(e.message)) {
console.log(`Gas price ${this.tx.gasPrice} gwei is too low, increasing and retrying`)
if (this._hasError(e.message, gasPriceErrors)) {
console.log(`Gas price ${fromWei(this.tx.gasPrice, 'gwei')} gwei is too low, increasing and retrying`)
this._increaseGasPrice()
return this._send()
}
if (this._hasError(e.message, sameTxErrors)) {
console.log('Same transaction is already in mempool, skipping submit')
// do nothing
}
}
/**
* Returns whether error message is contained in errors array
*
* @param message The message to look up
* @param {Array<string|RegExp>} errors Array with errors. Errors can be either string or regexp.
* @returns {boolean} Returns true if error message is present in the `errors` array
* @private
*/
_hasError(message, errors) {
return errors.find(e => typeof e === 'string' ? e === message : message.match(e)) !== undefined
}
_increaseGasPrice() {
@ -243,10 +341,17 @@ class Transaction {
return false
}
this.tx.gasPrice = toHex(BN.min(newGasPrice, maxGasPrice))
console.log(`Increasing gas price to ${fromWei(this.tx.gasPrice, 'Gwei')}`)
console.log(`Increasing gas price to ${fromWei(this.tx.gasPrice, 'gwei')} gwei`)
return true
}
/**
* Fetches gas price from the oracle
*
* @param {'instant'|'fast'|'normal'|'slow'} type
* @returns {Promise<string>} A hex string representing gas price in wei
* @private
*/
async _getGasPrice(type) {
const gasPrices = await this._gasPriceOracle.gasPrices()
const result = gasPrices[type].toString()
@ -254,6 +359,12 @@ class Transaction {
return toHex(toWei(gasPrices[type].toString(), 'gwei'))
}
/**
* Gets current nonce for the current account, ignoring any pending transactions
*
* @returns {Promise<number>}
* @private
*/
_getLastNonce() {
return this._web3.eth.getTransactionCount(this.address, 'latest')
}

37
testTxManager.js
View File

@ -1,8 +1,9 @@
const { toHex, toWei } = require('web3-utils')
const TxManager = require('./src/TxManager')
const { rpcUrl, privateKey } = require('./config')
const logHandles = require('why-is-node-running')
const TxM = new TxManager({
const manager = new TxManager({
privateKey,
rpcUrl,
config: {
@ -11,22 +12,25 @@ const TxM = new TxManager({
},
})
const tx = {
value: 0,
gasPrice: toHex(toWei('0.1', 'gwei')),
const tx1 = {
value: 1,
gasPrice: toHex(toWei('1', 'gwei')),
to: '0xA43Ce8Cc89Eff3AA5593c742fC56A30Ef2427CB0',
}
const tx2 = {
value: 1,
// gasPrice: toHex(toWei('0.1', 'gwei')),
value: 2,
// gasPrice: toHex(toWei('1', 'gwei')),
to: '0x0039F22efB07A647557C7C5d17854CFD6D489eF3',
}
async function main() {
const Tx = await TxM.createTx(tx)
const tx = manager.createTx(tx1)
const receipt1 = await Tx.send()
setTimeout(() => tx.cancel(), 1000)
// setTimeout(() => tx.replace(tx2), 1000)
const receipt = await tx.send()
.on('transactionHash', (hash) => {
console.log('hash', hash)
})
@ -37,21 +41,8 @@ async function main() {
console.log('confirmations', confirmations)
})
// setTimeout(async () => await Tx.cancel(), 800)
// const receipt2 = await Tx.replace(tx2)
// .on('transactionHash', (hash) => {
// console.log('hash', hash)
// })
// .on('mined', (receipt) => {
// console.log('Mined in block', receipt.blockNumber)
// })
// .on('confirmations', (confirmations) => {
// console.log('confirmations', confirmations)
// })
// console.log('receipt2', receipt2)
console.log('receipt1', await receipt1)
console.log('receipt', receipt)
// setTimeout(logHandles, 100)
}
main()

18
yarn.lock
View File

@ -3565,6 +3565,11 @@ shebang-regex@^1.0.0:
resolved "https://registry.yarnpkg.com/shebang-regex/-/shebang-regex-1.0.0.tgz#da42f49740c0b42db2ca9728571cb190c98efea3"
integrity sha1-2kL0l0DAtC2yypcoVxyxkMmO/qM=
siginfo@^2.0.0:
version "2.0.0"
resolved "https://registry.yarnpkg.com/siginfo/-/siginfo-2.0.0.tgz#32e76c70b79724e3bb567cb9d543eb858ccfaf30"
integrity sha512-ybx0WO1/8bSBLEWXZvEd7gMW3Sn3JFlW3TvX1nREbDLRNQNaeNN8WK0meBwPdAaOI7TtRRRJn/Es1zhrrCHu7g==
signal-exit@^3.0.0, signal-exit@^3.0.2:
version "3.0.3"
resolved "https://registry.yarnpkg.com/signal-exit/-/signal-exit-3.0.3.tgz#a1410c2edd8f077b08b4e253c8eacfcaf057461c"
@ -3624,6 +3629,11 @@ sshpk@^1.7.0:
safer-buffer "^2.0.2"
tweetnacl "~0.14.0"
stackback@0.0.2:
version "0.0.2"
resolved "https://registry.yarnpkg.com/stackback/-/stackback-0.0.2.tgz#1ac8a0d9483848d1695e418b6d031a3c3ce68e3b"
integrity sha1-Gsig2Ug4SNFpXkGLbQMaPDzmjjs=
standard-as-callback@^2.0.1:
version "2.0.1"
resolved "https://registry.yarnpkg.com/standard-as-callback/-/standard-as-callback-2.0.1.tgz#ed8bb25648e15831759b6023bdb87e6b60b38126"
@ -4348,6 +4358,14 @@ which@^1.2.9:
dependencies:
isexe "^2.0.0"
why-is-node-running@^2.2.0:
version "2.2.0"
resolved "https://registry.yarnpkg.com/why-is-node-running/-/why-is-node-running-2.2.0.tgz#fd0a73ea9303920fbb45457c6ecc392ebec90bd2"
integrity sha512-rxtN9D0lJaYyP92BR5yoyWecK2txBKmBIuS7GRbOPP5bXsT37/hBqcmTrlrt25DBr9p4WJb6c9LuYSJd89vHRQ==
dependencies:
siginfo "^2.0.0"
stackback "0.0.2"
wide-align@1.1.3:
version "1.1.3"
resolved "https://registry.yarnpkg.com/wide-align/-/wide-align-1.1.3.tgz#ae074e6bdc0c14a431e804e624549c633b000457"