mirror of
https://github.com/mempool/mempool.git
synced 2025-01-04 20:54:26 +01:00
377 lines
12 KiB
TypeScript
377 lines
12 KiB
TypeScript
import logger from '../logger';
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import * as WebSocket from 'ws';
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import { Block, TransactionExtended, WebsocketResponse, MempoolBlock, OptimizedStatistic } from '../interfaces';
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import blocks from './blocks';
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import memPool from './mempool';
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import backendInfo from './backend-info';
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import mempoolBlocks from './mempool-blocks';
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import fiatConversion from './fiat-conversion';
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import { Common } from './common';
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class WebsocketHandler {
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private static INITIAL_BLOCK_AMOUNT = 8;
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private wss: WebSocket.Server | undefined;
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private nativeAssetId = '6f0279e9ed041c3d710a9f57d0c02928416460c4b722ae3457a11eec381c526d';
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private extraInitProperties = {};
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constructor() { }
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setWebsocketServer(wss: WebSocket.Server) {
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this.wss = wss;
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}
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setExtraInitProperties(property: string, value: any) {
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this.extraInitProperties[property] = value;
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}
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setupConnectionHandling() {
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if (!this.wss) {
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throw new Error('WebSocket.Server is not set');
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}
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this.wss.on('connection', (client: WebSocket) => {
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client.on('message', (message: string) => {
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try {
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const parsedMessage: WebsocketResponse = JSON.parse(message);
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const response = {};
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if (parsedMessage.action === 'want') {
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client['want-blocks'] = parsedMessage.data.indexOf('blocks') > -1;
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client['want-mempool-blocks'] = parsedMessage.data.indexOf('mempool-blocks') > -1;
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client['want-live-2h-chart'] = parsedMessage.data.indexOf('live-2h-chart') > -1;
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client['want-stats'] = parsedMessage.data.indexOf('stats') > -1;
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}
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if (parsedMessage && parsedMessage['track-tx']) {
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if (/^[a-fA-F0-9]{64}$/.test(parsedMessage['track-tx'])) {
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client['track-tx'] = parsedMessage['track-tx'];
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// Client is telling the transaction wasn't found but it might have appeared before we had the time to start watching for it
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if (parsedMessage['watch-mempool']) {
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const tx = memPool.getMempool()[client['track-tx']];
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if (tx) {
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response['tx'] = tx;
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} else {
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client['track-mempool-tx'] = parsedMessage['track-tx'];
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}
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}
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} else {
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client['track-tx'] = null;
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}
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}
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if (parsedMessage && parsedMessage['track-address']) {
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if (/^([a-km-zA-HJ-NP-Z1-9]{26,35}|[a-km-zA-HJ-NP-Z1-9]{80}|[a-z]{2,5}1[ac-hj-np-z02-9]{8,87})$/
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.test(parsedMessage['track-address'])) {
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client['track-address'] = parsedMessage['track-address'];
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} else {
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client['track-address'] = null;
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}
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}
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if (parsedMessage && parsedMessage['track-asset']) {
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if (/^[a-fA-F0-9]{64}$/.test(parsedMessage['track-asset'])) {
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client['track-asset'] = parsedMessage['track-asset'];
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} else {
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client['track-asset'] = null;
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}
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}
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if (parsedMessage.action === 'init') {
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const _blocks = blocks.getBlocks();
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if (!_blocks) {
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return;
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}
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client.send(JSON.stringify({
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'mempoolInfo': memPool.getMempoolInfo(),
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'vBytesPerSecond': memPool.getVBytesPerSecond(),
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'lastDifficultyAdjustment': blocks.getLastDifficultyAdjustmentTime(),
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'blocks': _blocks.slice(Math.max(_blocks.length - WebsocketHandler.INITIAL_BLOCK_AMOUNT, 0)),
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'conversions': fiatConversion.getTickers()['BTCUSD'],
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'mempool-blocks': mempoolBlocks.getMempoolBlocks(),
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'transactions': memPool.getLatestTransactions(),
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'git-commit': backendInfo.gitCommitHash,
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'hostname': backendInfo.hostname,
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...this.extraInitProperties
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}));
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}
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if (parsedMessage.action === 'ping') {
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response['pong'] = true;
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}
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if (parsedMessage['track-donation'] && parsedMessage['track-donation'].length === 22) {
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client['track-donation'] = parsedMessage['track-donation'];
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}
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if (Object.keys(response).length) {
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client.send(JSON.stringify(response));
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}
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} catch (e) {
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logger.err('Error parsing websocket message: ' + e);
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}
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});
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});
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}
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handleNewDonation(id: string) {
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if (!this.wss) {
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throw new Error('WebSocket.Server is not set');
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}
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this.wss.clients.forEach((client: WebSocket) => {
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if (client.readyState !== WebSocket.OPEN) {
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return;
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}
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if (client['track-donation'] === id) {
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client.send(JSON.stringify({ donationConfirmed: true }));
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}
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});
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}
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handleNewStatistic(stats: OptimizedStatistic) {
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if (!this.wss) {
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throw new Error('WebSocket.Server is not set');
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}
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this.wss.clients.forEach((client: WebSocket) => {
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if (client.readyState !== WebSocket.OPEN) {
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return;
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}
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if (!client['want-live-2h-chart']) {
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return;
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}
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client.send(JSON.stringify({
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'live-2h-chart': stats
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}));
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});
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}
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handleMempoolChange(newMempool: { [txid: string]: TransactionExtended },
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newTransactions: TransactionExtended[], deletedTransactions: TransactionExtended[]) {
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if (!this.wss) {
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throw new Error('WebSocket.Server is not set');
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}
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mempoolBlocks.updateMempoolBlocks(newMempool);
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const mBlocks = mempoolBlocks.getMempoolBlocks();
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const mempoolInfo = memPool.getMempoolInfo();
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const vBytesPerSecond = memPool.getVBytesPerSecond();
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const rbfTransactions = Common.findRbfTransactions(newTransactions, deletedTransactions);
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this.wss.clients.forEach((client: WebSocket) => {
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if (client.readyState !== WebSocket.OPEN) {
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return;
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}
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const response = {};
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if (client['want-stats']) {
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response['mempoolInfo'] = mempoolInfo;
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response['vBytesPerSecond'] = vBytesPerSecond;
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response['transactions'] = newTransactions.slice(0, 6).map((tx) => Common.stripTransaction(tx));
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}
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if (client['want-mempool-blocks']) {
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response['mempool-blocks'] = mBlocks;
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}
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if (client['track-mempool-tx']) {
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const tx = newTransactions.find((t) => t.txid === client['track-mempool-tx']);
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if (tx) {
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response['tx'] = tx;
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client['track-mempool-tx'] = null;
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}
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}
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if (client['track-address']) {
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const foundTransactions: TransactionExtended[] = [];
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newTransactions.forEach((tx) => {
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const someVin = tx.vin.some((vin) => !!vin.prevout && vin.prevout.scriptpubkey_address === client['track-address']);
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if (someVin) {
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foundTransactions.push(tx);
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return;
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}
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const someVout = tx.vout.some((vout) => vout.scriptpubkey_address === client['track-address']);
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if (someVout) {
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foundTransactions.push(tx);
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}
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});
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if (foundTransactions.length) {
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response['address-transactions'] = foundTransactions;
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}
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}
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if (client['track-asset']) {
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const foundTransactions: TransactionExtended[] = [];
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newTransactions.forEach((tx) => {
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if (client['track-asset'] === this.nativeAssetId) {
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if (tx.vin.some((vin) => !!vin.is_pegin)) {
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foundTransactions.push(tx);
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return;
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}
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if (tx.vout.some((vout) => !!vout.pegout)) {
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foundTransactions.push(tx);
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}
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} else {
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if (tx.vin.some((vin) => !!vin.issuance && vin.issuance.asset_id === client['track-asset'])) {
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foundTransactions.push(tx);
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return;
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}
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if (tx.vout.some((vout) => !!vout.asset && vout.asset === client['track-asset'])) {
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foundTransactions.push(tx);
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}
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}
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});
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if (foundTransactions.length) {
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response['address-transactions'] = foundTransactions;
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}
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}
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if (client['track-tx'] && rbfTransactions[client['track-tx']]) {
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for (const rbfTransaction in rbfTransactions) {
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if (client['track-tx'] === rbfTransaction) {
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response['rbfTransaction'] = rbfTransactions[rbfTransaction];
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break;
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}
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}
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}
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if (Object.keys(response).length) {
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client.send(JSON.stringify(response));
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}
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});
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}
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handleNewBlock(block: Block, txIds: string[], transactions: TransactionExtended[]) {
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if (!this.wss) {
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throw new Error('WebSocket.Server is not set');
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}
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// Check how many transactions in the new block matches the latest projected mempool block
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// If it's more than 0, recalculate the mempool blocks and send to client in the same update
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let mBlocks: undefined | MempoolBlock[];
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let matchRate = 0;
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const _mempoolBlocks = mempoolBlocks.getMempoolBlocksWithTransactions();
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if (_mempoolBlocks[0]) {
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const matches: string[] = [];
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for (const txId of txIds) {
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if (_mempoolBlocks[0].transactionIds.indexOf(txId) > -1) {
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matches.push(txId);
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}
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}
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matchRate = Math.round((matches.length / (txIds.length - 1)) * 100);
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if (matchRate > 0) {
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const currentMemPool = memPool.getMempool();
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for (const txId of matches) {
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delete currentMemPool[txId];
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}
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mempoolBlocks.updateMempoolBlocks(currentMemPool);
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mBlocks = mempoolBlocks.getMempoolBlocks();
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}
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}
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block.matchRate = matchRate;
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this.wss.clients.forEach((client) => {
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if (client.readyState !== WebSocket.OPEN) {
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return;
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}
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if (!client['want-blocks']) {
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return;
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}
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const response = {
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'block': block,
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'mempoolInfo': memPool.getMempoolInfo(),
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'lastDifficultyAdjustment': blocks.getLastDifficultyAdjustmentTime(),
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};
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if (mBlocks && client['want-mempool-blocks']) {
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response['mempool-blocks'] = mBlocks;
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}
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if (client['track-tx'] && txIds.indexOf(client['track-tx']) > -1) {
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client['track-tx'] = null;
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response['txConfirmed'] = true;
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}
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if (client['track-address']) {
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const foundTransactions: TransactionExtended[] = [];
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transactions.forEach((tx) => {
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if (tx.vin && tx.vin.some((vin) => !!vin.prevout && vin.prevout.scriptpubkey_address === client['track-address'])) {
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foundTransactions.push(tx);
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return;
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}
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if (tx.vout && tx.vout.some((vout) => vout.scriptpubkey_address === client['track-address'])) {
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foundTransactions.push(tx);
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}
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});
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if (foundTransactions.length) {
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foundTransactions.forEach((tx) => {
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tx.status = {
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confirmed: true,
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block_height: block.height,
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block_hash: block.id,
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block_time: block.timestamp,
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};
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});
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response['block-transactions'] = foundTransactions;
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}
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}
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if (client['track-asset']) {
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const foundTransactions: TransactionExtended[] = [];
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transactions.forEach((tx) => {
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if (client['track-asset'] === this.nativeAssetId) {
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if (tx.vin && tx.vin.some((vin) => !!vin.is_pegin)) {
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foundTransactions.push(tx);
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return;
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}
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if (tx.vout && tx.vout.some((vout) => !!vout.pegout)) {
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foundTransactions.push(tx);
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}
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} else {
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if (tx.vin && tx.vin.some((vin) => !!vin.issuance && vin.issuance.asset_id === client['track-asset'])) {
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foundTransactions.push(tx);
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return;
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}
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if (tx.vout && tx.vout.some((vout) => !!vout.asset && vout.asset === client['track-asset'])) {
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foundTransactions.push(tx);
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}
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}
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});
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if (foundTransactions.length) {
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foundTransactions.forEach((tx) => {
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tx.status = {
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confirmed: true,
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block_height: block.height,
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block_hash: block.id,
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block_time: block.timestamp,
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};
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});
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response['block-transactions'] = foundTransactions;
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}
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}
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client.send(JSON.stringify(response));
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});
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}
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}
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export default new WebsocketHandler();
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