Connect FTP NDJSON file and Firebase Realtime Database in our serverless environment

class SftpSourceReadRemoteNdjson {
    async init() {
        // TODO: Create your sftp credential
        // More info at https://yepcode.io/docs/integrations/sftp/#credential-configuration
        this.sftp = await yepcode.integration.sftp("your-sftp-credential-name");
    }

    async fetch(publish, done) {
        // TODO: Customize your ndjson file path to download
        const stream = new PassThrough();
        stream
            .pipe(ndjson.parse())
            .on("data", async (line) => {
                await publish(line);
            })
            .on("end", done);

        // TODO: Customize the ndjson file location
        await this.sftp.get("/remoteDirPath/fileName.ndjson", stream);
    }

    async close() {
        await this.sftp.end();
    }
}

class FirebaseTargetInsertInRealtimeDb {
    async init() {
        // TODO: Create your firebase credential
        // More info at https://yepcode.io/docs/integrations/firebase/#credential-configuration
        this.firebase = yepcode.integration.firebase(
            "your-firebase-credential-name"
        );
        this.db = getDatabase(this.firebase);
    }

    async consume(item) {
        // TODO: Customize the path of your item in firebase
        const pathToObject = `/${item.id}`;
        await set(ref(this.db, pathToObject), item);
    }

    async close() {
        deleteApp(this.firebase);
    }
}