evolution-api/src/db/db.connect.ts

import mongoose from 'mongoose';

import { configService, Database } from '../config/env.config';
import { Logger } from '../config/logger.config';

const logger = new Logger('MongoDB');

const db = configService.get<Database>('DATABASE');
export const dbserver = (() => {
    if (db.ENABLED) {
        logger.verbose('connecting');
        const dbs = mongoose.createConnection(db.CONNECTION.URI, {
            dbName: db.CONNECTION.DB_PREFIX_NAME + '-whatsapp-api',
        });
        logger.verbose('connected in ' + db.CONNECTION.URI);
        logger.info('ON - dbName: ' + dbs['$dbName']);

        process.on('beforeExit', () => {
            logger.verbose('instance destroyed');
            dbserver.destroy(true, (error) => logger.error(error));
        });

        return dbs;
    }
})();