44 lines
1.6 KiB
TypeScript
44 lines
1.6 KiB
TypeScript
import 'reflect-metadata';
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import { Connection, PublicKey } from '@solana/web3.js';
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import { Market, decodeEventQueue } from '@project-serum/serum';
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import { SerumEvent } from './entity';
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import { formatFilledEvents, SOURCES } from './utils';
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import { SERUM_DEX_V3_PK } from '.';
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const insertEvents = async (events: Array<any>, marketMeta, loadTimestamp, db) => {
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const eventRepo = db.getRepository(SerumEvent);
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if (events.length) {
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try {
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await eventRepo.createQueryBuilder().insert().values(events).orIgnore().execute();
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} catch (error) {
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console.error('Error inserting into Event table:', error);
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}
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}
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};
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export const watchMarketEventQueue = async (db, marketMeta) => {
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let connection = new Connection('https://mango.rpcpool.com/');
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let marketPk = new PublicKey(marketMeta.address);
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let programID = new PublicKey(SERUM_DEX_V3_PK);
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let market = await Market.load(connection, marketPk, {}, programID);
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const eventQueueAccount = market['_decoded'].eventQueue;
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connection.onAccountChange(eventQueueAccount, (event) => {
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const loadTimestamp = new Date().toISOString();
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const decodedEventQueue = decodeEventQueue(event.data);
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const filledEvents = decodedEventQueue.filter((e) => e.eventFlags['fill']);
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if (filledEvents.length > 0) {
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console.log('event inserted for', marketMeta.name);
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const formattedFilledEvents = formatFilledEvents(
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filledEvents,
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marketMeta,
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loadTimestamp,
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SOURCES.websocket
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);
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insertEvents(formattedFilledEvents, marketMeta, loadTimestamp, db);
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}
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});
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};
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