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transaction_pool.ts
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transaction_pool.ts
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/*
* Copyright © 2018 Lisk Foundation
*
* See the LICENSE file at the top-level directory of this distribution
* for licensing information.
*
* Unless otherwise agreed in a custom licensing agreement with the Lisk Foundation,
* no part of this software, including this file, may be copied, modified,
* propagated, or distributed except according to the terms contained in the
* LICENSE file.
*
* Removal or modification of this copyright notice is prohibited.
*
*/
import { EventEmitter } from 'events';
import {
CheckerFunction,
CheckTransactionsResponseWithPassAndFail,
CheckTransactionsResponseWithPassFailAndPending,
checkTransactionsWithPassAndFail,
checkTransactionsWithPassFailAndPending,
Status,
TransactionResponse,
} from './check_transactions';
import { Job } from './job';
import { Queue } from './queue';
import * as queueCheckers from './queue_checkers';
export interface TransactionObject {
readonly id: string;
receivedAt?: Date;
readonly recipientId: string;
readonly senderPublicKey: string;
signatures?: ReadonlyArray<string>;
readonly type: number;
readonly senderId: string;
containsUniqueData?: boolean;
}
export interface SignatureObject {
transactionId: string;
signature: string;
publicKey: string;
}
export interface TransactionFunctions {
isExpired(date: Date): boolean;
verifyAgainstOtherTransactions(
otherTransactions: ReadonlyArray<Transaction>,
): boolean;
addVerifiedSignature(signature: string): TransactionResponse;
isReady(): boolean;
}
export interface TransactionPoolConfiguration {
readonly expireTransactionsInterval: number;
readonly maxTransactionsPerQueue: number;
readonly receivedTransactionsLimitPerProcessing: number;
readonly receivedTransactionsProcessingInterval: number;
readonly validatedTransactionsLimitPerProcessing: number;
readonly validatedTransactionsProcessingInterval: number;
readonly verifiedTransactionsLimitPerProcessing: number;
readonly verifiedTransactionsProcessingInterval: number;
readonly pendingTransactionsProcessingLimit: number;
}
export interface AddTransactionResult {
readonly alreadyExists: boolean;
readonly isFull: boolean;
readonly queueName: QueueNames;
}
interface TransactionPoolDependencies {
processTransactions: CheckerFunction;
validateTransactions: CheckerFunction;
verifyTransactions: CheckerFunction;
}
type TransactionPoolOptions = TransactionPoolConfiguration &
TransactionPoolDependencies;
export type Transaction = TransactionObject & TransactionFunctions;
export type QueueNames =
| 'received'
| 'validated'
| 'verified'
| 'pending'
| 'ready';
interface Queues {
readonly [queue: string]: Queue;
}
const DEFAULT_PENDING_TRANSACTIONS_PROCESSING_LIMIT = 5;
const DEFAULT_EXPIRE_TRANSACTION_INTERVAL = 30000;
const DEFAULT_MAX_TRANSACTIONS_PER_QUEUE = 1000;
const DEFAULT_RECEIVED_TRANSACTIONS_PROCESSING_INTERVAL = 30000;
const DEFAULT_RECEIVED_TRANSACTIONS_LIMIT_PER_PROCESSING = 100;
const DEFAULT_VALIDATED_TRANSACTIONS_PROCESSING_INTERVAL = 30000;
const DEFAULT_VALIDATED_TRANSACTIONS_LIMIT_PER_PROCESSING = 100;
const DEFAULT_VERIFIED_TRANSACTIONS_PROCESSING_INTERVAL = 30000;
const DEFAULT_VERIFIED_TRANSACTIONS_LIMIT_PER_PROCESSING = 100;
export const EVENT_ADDED_TRANSACTIONS = 'transactionsAdded';
export const EVENT_REMOVED_TRANSACTIONS = 'transactionsRemoved';
export const ACTION_ADD_VERIFIED_REMOVED_TRANSACTIONS =
'addVerifiedRemovedTransactions';
export const ACTION_REMOVE_CONFIRMED_TRANSACTIONS =
'removeConfirmedTransactions';
export const ACTION_ADD_TRANSACTIONS = 'addTransactions';
export const ACTION_EXPIRE_TRANSACTIONS = 'expireTransactions';
export const ACTION_PROCESS_VERIFIED_TRANSACTIONS =
'processVerifiedTransactions';
export const ACTION_VALIDATE_RECEIVED_TRANSACTIONS =
'validateReceivedTransactions';
export const ACTION_VERIFY_VALIDATED_TRANSACTIONS =
'verifyValidatedTransactions';
export class TransactionPool extends EventEmitter {
private readonly _pendingTransactionsProcessingLimit: number;
private readonly _expireTransactionsInterval: number;
private readonly _expireTransactionsJob: Job<ReadonlyArray<Transaction>>;
private readonly _maxTransactionsPerQueue: number;
private readonly _queues: Queues;
private readonly _receivedTransactionsProcessingInterval: number;
private readonly _receivedTransactionsProcessingLimitPerInterval: number;
private readonly _validatedTransactionsProcessingInterval: number;
private readonly _validatedTransactionsProcessingLimitPerInterval: number;
private readonly _verifiedTransactionsProcessingInterval: number;
private readonly _verifiedTransactionsProcessingLimitPerInterval: number;
private readonly _validateTransactions: CheckerFunction;
private readonly _validateTransactionsJob: Job<
CheckTransactionsResponseWithPassAndFail
>;
private readonly _verifyTransactions: CheckerFunction;
private readonly _verifyTransactionsJob: Job<
CheckTransactionsResponseWithPassAndFail
>;
private readonly _processTransactions: CheckerFunction;
private readonly _processTransactionsJob: Job<
CheckTransactionsResponseWithPassAndFail
>;
public constructor({
expireTransactionsInterval = DEFAULT_EXPIRE_TRANSACTION_INTERVAL,
maxTransactionsPerQueue = DEFAULT_MAX_TRANSACTIONS_PER_QUEUE,
receivedTransactionsProcessingInterval = DEFAULT_RECEIVED_TRANSACTIONS_PROCESSING_INTERVAL,
receivedTransactionsLimitPerProcessing = DEFAULT_RECEIVED_TRANSACTIONS_LIMIT_PER_PROCESSING,
validatedTransactionsProcessingInterval = DEFAULT_VALIDATED_TRANSACTIONS_PROCESSING_INTERVAL,
validatedTransactionsLimitPerProcessing = DEFAULT_VALIDATED_TRANSACTIONS_LIMIT_PER_PROCESSING,
verifiedTransactionsProcessingInterval = DEFAULT_VERIFIED_TRANSACTIONS_PROCESSING_INTERVAL,
verifiedTransactionsLimitPerProcessing = DEFAULT_VERIFIED_TRANSACTIONS_LIMIT_PER_PROCESSING,
pendingTransactionsProcessingLimit = DEFAULT_PENDING_TRANSACTIONS_PROCESSING_LIMIT,
validateTransactions,
verifyTransactions,
processTransactions,
}: TransactionPoolOptions) {
super();
this._maxTransactionsPerQueue = maxTransactionsPerQueue;
this._pendingTransactionsProcessingLimit = pendingTransactionsProcessingLimit;
this._queues = {
received: new Queue(),
validated: new Queue(),
verified: new Queue(),
pending: new Queue(),
ready: new Queue(),
};
this._expireTransactionsInterval = expireTransactionsInterval;
this._expireTransactionsJob = new Job(
this.expireTransactions.bind(this),
this._expireTransactionsInterval,
);
// tslint:disable-next-line:no-floating-promises
this._expireTransactionsJob.start();
this._receivedTransactionsProcessingInterval = receivedTransactionsProcessingInterval;
this._receivedTransactionsProcessingLimitPerInterval = receivedTransactionsLimitPerProcessing;
this._validateTransactions = validateTransactions;
this._validateTransactionsJob = new Job(
this.validateReceivedTransactions.bind(this),
this._receivedTransactionsProcessingInterval,
);
// tslint:disable-next-line:no-floating-promises
this._validateTransactionsJob.start();
this._validatedTransactionsProcessingInterval = validatedTransactionsProcessingInterval;
this._validatedTransactionsProcessingLimitPerInterval = validatedTransactionsLimitPerProcessing;
this._verifyTransactions = verifyTransactions;
this._verifyTransactionsJob = new Job(
this.verifyValidatedTransactions.bind(this),
this._validatedTransactionsProcessingInterval,
);
// tslint:disable-next-line:no-floating-promises
this._verifyTransactionsJob.start();
this._verifiedTransactionsProcessingInterval = verifiedTransactionsProcessingInterval;
this._verifiedTransactionsProcessingLimitPerInterval = verifiedTransactionsLimitPerProcessing;
this._processTransactions = processTransactions;
this._processTransactionsJob = new Job(
this.processVerifiedTransactions.bind(this),
this._verifiedTransactionsProcessingInterval,
);
// tslint:disable-next-line:no-floating-promises
this._processTransactionsJob.start();
}
public cleanup(): void {
this.removeTransactionsFromQueues(
Object.keys(this.queues),
queueCheckers.returnTrueUntilLimit(this._maxTransactionsPerQueue),
);
this._expireTransactionsJob.stop();
this._validateTransactionsJob.stop();
this._verifyTransactionsJob.stop();
this._processTransactionsJob.stop();
}
public addTransaction(transaction: Transaction): AddTransactionResult {
const receivedQueue: QueueNames = 'received';
return this.addTransactionToQueue(receivedQueue, transaction);
}
public addPendingTransaction(transaction: Transaction): AddTransactionResult {
const pendingQueue: QueueNames = 'pending';
return this.addTransactionToQueue(pendingQueue, transaction);
}
public addVerifiedTransaction(
transaction: Transaction,
): AddTransactionResult {
const verifiedQueue: QueueNames = 'verified';
return this.addTransactionToQueue(verifiedQueue, transaction);
}
public addVerifiedRemovedTransactions(
transactions: ReadonlyArray<Transaction>,
): void {
const { received, validated, ...otherQueues } = this._queues;
// Move transactions from the validated queue to the received queue where account was a receipient in the verified removed transactions
// Rationale is explained in issue #963
const removedTransactionsByRecipientIdFromValidatedQueue = this._queues.validated.removeFor(
queueCheckers.checkTransactionForSenderIdWithRecipientIds(transactions),
);
this._queues.received.enqueueMany(
removedTransactionsByRecipientIdFromValidatedQueue,
);
// Move transactions from the verified, pending and ready queues to the validated queue where account was a receipient in the verified removed transactions
const removedTransactionsByRecipientIdFromOtherQueues = this.removeTransactionsFromQueues(
Object.keys(otherQueues),
queueCheckers.checkTransactionForSenderIdWithRecipientIds(transactions),
);
this._queues.validated.enqueueMany(
removedTransactionsByRecipientIdFromOtherQueues,
);
// Add transactions to the verified queue which were included in the verified removed transactions
this._queues.verified.enqueueMany(transactions);
this.emit(EVENT_ADDED_TRANSACTIONS, {
action: ACTION_ADD_VERIFIED_REMOVED_TRANSACTIONS,
to: 'verified',
payload: transactions,
});
}
// It is assumed that signature is verified for this transaction before this function is called
public addVerifiedSignature(
signatureObject: SignatureObject,
): TransactionResponse {
const transaction = this.findInTransactionPool(
signatureObject.transactionId,
);
if (transaction) {
return transaction.addVerifiedSignature(signatureObject.signature);
}
return {
id: signatureObject.transactionId,
status: Status.FAIL,
errors: [new Error('Could not find transaction in transaction pool')],
};
}
public existsInTransactionPool(id: string): boolean {
return Object.keys(this._queues).reduce(
(previousValue, queueName) =>
previousValue || this._queues[queueName].exists(id),
false,
);
}
public findInTransactionPool(id: string): Transaction | undefined {
return Object.keys(this._queues).reduce(
(previousValue: Transaction | undefined, queueName) =>
previousValue || this._queues[queueName].index[id],
undefined,
);
}
public get queues(): Queues {
return this._queues;
}
public getProcessableTransactions(limit: number): ReadonlyArray<Transaction> {
return this._queues.ready.peekUntil(
queueCheckers.returnTrueUntilLimit(limit),
);
}
public removeConfirmedTransactions(
transactions: ReadonlyArray<Transaction>,
): void {
// Remove transactions in the transaction pool which were included in the confirmed transactions
const removedTransactions = this.removeTransactionsFromQueues(
Object.keys(this._queues),
queueCheckers.checkTransactionForId(transactions),
);
const { received, validated, ...otherQueues } = this._queues;
const confirmedTransactionsWithUniqueData = transactions.filter(
(transaction: Transaction) => transaction.containsUniqueData,
);
// Remove transactions from the validated queue which were sent from the accounts in the confirmed transactions
const removedTransactionsBySenderPublicKeysFromValidatedQueue = this._queues.validated.removeFor(
queueCheckers.checkTransactionForSenderPublicKey(transactions),
);
// Remove transactions from the validated queue if they are of a type which includes unique data and that type is included in the confirmed transactions
const removedTransactionsByTypesFromValidatedQueue = this._queues.validated.removeFor(
queueCheckers.checkTransactionForTypes(
confirmedTransactionsWithUniqueData,
),
);
// Add removed transactions from the validated queue to the received queue
// Rationale is explained in issue #963
this._queues.received.enqueueMany([
...removedTransactionsBySenderPublicKeysFromValidatedQueue,
...removedTransactionsByTypesFromValidatedQueue,
]);
// Remove transactions from the verified, pending and ready queues which were sent from the accounts in the confirmed transactions
const removedTransactionsBySenderPublicKeysFromOtherQueues = this.removeTransactionsFromQueues(
Object.keys(otherQueues),
queueCheckers.checkTransactionForSenderPublicKey(transactions),
);
// Remove all transactions from the verified, pending and ready queues if they are of a type which includes unique data and that type is included in the confirmed transactions
const removedTransactionsByTypesFromOtherQueues = this.removeTransactionsFromQueues(
Object.keys(otherQueues),
queueCheckers.checkTransactionForTypes(
confirmedTransactionsWithUniqueData,
),
);
this.emit(EVENT_REMOVED_TRANSACTIONS, {
action: ACTION_REMOVE_CONFIRMED_TRANSACTIONS,
payload: removedTransactions,
});
// Add transactions which need to be reverified to the validated queue
this._queues.validated.enqueueMany([
...removedTransactionsBySenderPublicKeysFromOtherQueues,
...removedTransactionsByTypesFromOtherQueues,
]);
}
public reverifyTransactionsFromSenders(
senderPublicKeys: ReadonlyArray<string>,
): void {
const { received, validated, ...otherQueues } = this._queues;
const senderProperty: queueCheckers.TransactionFilterableKeys =
'senderPublicKey';
// Move transactions from the validated queue to the received queue which were sent from sender accounts
// Rationale is explained in issue #963
const removedTransactionsBySenderPublicKeysFromValidatedQueue = this._queues.validated.removeFor(
queueCheckers.checkTransactionPropertyForValues(
senderPublicKeys,
senderProperty,
),
);
this._queues.received.enqueueMany(
removedTransactionsBySenderPublicKeysFromValidatedQueue,
);
// Move transactions from the verified, pending and ready queues to the validated queue which were sent from sender accounts
const removedTransactionsBySenderPublicKeysFromOtherQueues = this.removeTransactionsFromQueues(
Object.keys(otherQueues),
queueCheckers.checkTransactionPropertyForValues(
senderPublicKeys,
senderProperty,
),
);
this._queues.validated.enqueueMany(
removedTransactionsBySenderPublicKeysFromOtherQueues,
);
}
// This function is currently unused, the usability of this function will be decided after performance tests
public validateTransactionAgainstTransactionsInPool(
transaction: Transaction,
): boolean {
return transaction.verifyAgainstOtherTransactions([
...this.queues.ready.transactions,
...this.queues.pending.transactions,
...this.queues.verified.transactions,
]);
}
private addTransactionToQueue(
queueName: QueueNames,
transaction: Transaction,
): AddTransactionResult {
if (this.existsInTransactionPool(transaction.id)) {
return {
isFull: false,
alreadyExists: true,
queueName,
};
}
if (this._queues[queueName].size() >= this._maxTransactionsPerQueue) {
return {
isFull: true,
alreadyExists: false,
queueName,
};
}
// Add receivedAt property for the transaction
transaction.receivedAt = new Date();
this._queues[queueName].enqueueOne(transaction);
this.emit(EVENT_ADDED_TRANSACTIONS, {
action: ACTION_ADD_TRANSACTIONS,
to: queueName,
payload: [transaction],
});
return {
isFull: false,
alreadyExists: false,
queueName,
};
}
private async expireTransactions(): Promise<ReadonlyArray<Transaction>> {
const expiredTransactions = this.removeTransactionsFromQueues(
Object.keys(this._queues),
queueCheckers.checkTransactionForExpiry(),
);
this.emit(EVENT_REMOVED_TRANSACTIONS, {
action: ACTION_EXPIRE_TRANSACTIONS,
payload: expiredTransactions,
});
return expiredTransactions;
}
private async processVerifiedTransactions(): Promise<
CheckTransactionsResponseWithPassAndFail
> {
const transactionsInReadyQueue = this._queues.ready.size();
const transactionsInVerifiedQueue = this._queues.verified.size();
const processableTransactionsInPendingQueue = this._queues.pending.sizeBy(
transaction => transaction.isReady(),
);
if (
transactionsInReadyQueue >=
this._verifiedTransactionsProcessingLimitPerInterval ||
(transactionsInVerifiedQueue === 0 &&
processableTransactionsInPendingQueue === 0)
) {
return {
passedTransactions: [],
failedTransactions: [],
};
}
const additionalTransactionsToProcessLimit =
this._verifiedTransactionsProcessingLimitPerInterval -
transactionsInReadyQueue;
const transactionsFromPendingQueueLimit = Math.min(
additionalTransactionsToProcessLimit,
this._pendingTransactionsProcessingLimit,
);
// Filter at max transactionsFromPendingQueueLimit from the pending queue which are also ready
const transactionsFromPendingQueue = this._queues.pending
.filter(transaction => transaction.isReady())
.slice(0, transactionsFromPendingQueueLimit);
const additionalVerifiedTransactionsToProcessLimit =
additionalTransactionsToProcessLimit -
transactionsFromPendingQueue.length;
const transactionsFromVerifiedQueue = this._queues.verified.peekUntil(
queueCheckers.returnTrueUntilLimit(
additionalVerifiedTransactionsToProcessLimit,
),
);
const transactionsFromReadyQueue = this._queues.ready.peekUntil(
queueCheckers.returnTrueUntilLimit(transactionsInReadyQueue),
);
const toProcessTransactions = [
...transactionsFromReadyQueue,
...transactionsFromPendingQueue,
...transactionsFromVerifiedQueue,
];
const {
passedTransactions,
failedTransactions,
} = await checkTransactionsWithPassAndFail(
toProcessTransactions,
this._processTransactions,
);
const { received, validated, ...otherQueues } = this._queues;
// Remove invalid transactions from verified, pending and ready queues
const removedTransactions = this.removeTransactionsFromQueues(
Object.keys(otherQueues),
queueCheckers.checkTransactionForId(failedTransactions),
);
// Keep transactions in the ready queue which still exist
this._queues.ready.enqueueMany(
this._queues.ready.removeFor(
queueCheckers.checkTransactionForId(passedTransactions),
),
);
// Move processeable transactions from the verified queue to the ready queue
this._queues.ready.enqueueMany(
this._queues.verified.removeFor(
queueCheckers.checkTransactionForId(passedTransactions),
),
);
// Move processable transactions from the pending queue to the ready queue
this._queues.ready.enqueueMany(
this._queues.pending.removeFor(
queueCheckers.checkTransactionForId(passedTransactions),
),
);
this.emit(EVENT_REMOVED_TRANSACTIONS, {
action: ACTION_PROCESS_VERIFIED_TRANSACTIONS,
payload: removedTransactions,
});
return {
passedTransactions,
failedTransactions,
};
}
private removeTransactionsFromQueues(
queueNames: ReadonlyArray<string>,
condition: (transaction: Transaction) => boolean,
): ReadonlyArray<Transaction> {
return queueNames
.map(queueName => this._queues[queueName].removeFor(condition))
.reduce(
(
transactionsAccumulatedFromQueues: ReadonlyArray<Transaction>,
transactionsFromCurrentQueue: ReadonlyArray<Transaction>,
) =>
transactionsAccumulatedFromQueues.concat(
transactionsFromCurrentQueue,
),
[],
);
}
private async validateReceivedTransactions(): Promise<
CheckTransactionsResponseWithPassAndFail
> {
if (
this.queues.validated.size() >= this._maxTransactionsPerQueue ||
this.queues.received.size() === 0
) {
return {
passedTransactions: [],
failedTransactions: [],
};
}
const toValidateTransactions = this._queues.received.peekUntil(
queueCheckers.returnTrueUntilLimit(
this._receivedTransactionsProcessingLimitPerInterval,
),
);
const {
passedTransactions,
failedTransactions,
} = await checkTransactionsWithPassAndFail(
toValidateTransactions,
this._validateTransactions,
);
// Remove invalid transactions
const removedTransactions = this._queues.received.removeFor(
queueCheckers.checkTransactionForId(failedTransactions),
);
// Move valid transactions from the received queue to the validated queue
this._queues.validated.enqueueMany(
this._queues.received.removeFor(
queueCheckers.checkTransactionForId(passedTransactions),
),
);
this.emit(EVENT_REMOVED_TRANSACTIONS, {
action: ACTION_VALIDATE_RECEIVED_TRANSACTIONS,
payload: removedTransactions,
});
return {
passedTransactions,
failedTransactions,
};
}
private async verifyValidatedTransactions(): Promise<
CheckTransactionsResponseWithPassFailAndPending
> {
if (
this.queues.verified.size() >= this._maxTransactionsPerQueue ||
this.queues.validated.size() === 0
) {
return {
passedTransactions: [],
failedTransactions: [],
pendingTransactions: [],
};
}
const toVerifyTransactions = this._queues.validated.peekUntil(
queueCheckers.returnTrueUntilLimit(
this._validatedTransactionsProcessingLimitPerInterval,
),
);
const {
failedTransactions,
pendingTransactions,
passedTransactions,
} = await checkTransactionsWithPassFailAndPending(
toVerifyTransactions,
this._verifyTransactions,
);
// Remove invalid transactions
const removedTransactions = this._queues.validated.removeFor(
queueCheckers.checkTransactionForId(failedTransactions),
);
// Move verified transactions from the validated queue to the verified queue
this._queues.verified.enqueueMany(
this._queues.validated.removeFor(
queueCheckers.checkTransactionForId(passedTransactions),
),
);
// Move verified pending transactions from the validated queue to the pending queue
this._queues.pending.enqueueMany(
this._queues.validated.removeFor(
queueCheckers.checkTransactionForId(pendingTransactions),
),
);
this.emit(EVENT_REMOVED_TRANSACTIONS, {
action: ACTION_VERIFY_VALIDATED_TRANSACTIONS,
payload: removedTransactions,
});
return {
passedTransactions,
failedTransactions,
pendingTransactions,
};
}
}