Connect FTP NDJSON file and Mailchimp 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 HttpTargetMailchimpCreateEmailSuscribers {
    async init() {
        // TODO: Create your http credential with mailchimp information:
        // More info at https://yepcode.io/docs/integrations/http/#credential-configuration
        // Official docs: https://mailchimp.com/developer/marketing/api/
        this.mailchimp = await yepcode.integration.http(
            "your-mailchimp-credential-name"
        );
    }
    async consume(item) {
        // TODO: Create an email suscriber to a workflow indicating workflow id, workflow emaail id and email address you want to suscribe.
        // More info at https://mailchimp.com/developer/marketing/api/automation-email-queue/add-subscriber-to-workflow-email/
        await this.mailchimp.post(
            `/automations/${item.workflowId}/emails/${item.workflowEmailId}/queue`, {
                workflow_id: item.workflowId,
                workflow_email_id: item.workflowEmailId,
                email_address: item.emailAddress,
            }
        );
    }

    async close() {}
}