How do we restrict Google Pay features to a pilot group using feature flags and policy controls?

Since Juspay does not provide a dedicated, direct SIEM integration for its Safe logs, the most secure and least-privilege approach is to use a server-side API key to pull logs programmatically from the Juspay Dashboard and send them to your SIEM. This method avoids granting broad, interactive dashboard access to a machine and lets you tightly control the credential's scope.

Rollback plan

• 1. Implement a multi-gateway architecture

To avoid a total payment outage, your system should be able to route transactions through multiple gateways. If you are migrating from an existing gateway, keep that gateway fully operational as a fallback option.

Smart routing: Configure a rule-based engine to send a percentage of transactions to the new PayU gateway. This allows you to monitor performance in a live environment without a full-scale migration.

Automated failover: Implement logic to automatically detect a performance degradation in the PayU gateway (e.g., increased latency, higher error rates) and reroute 100% of traffic to the previous or an alternative gateway.

• 2. Define clear rollback triggers

Establish specific, measurable thresholds that, if crossed, automatically or manually trigger a rollback to the previous payment system.

Transaction success rate: A drop of more than 2% in the payment success rate over a 10-minute period.

Gateway response time: An average response time increase of more than 500ms for a sustained period.

Error rate: A spike in 5xx HTTP errors or specific PayU-related decline codes.

Customer complaints: A sudden increase in support tickets mentioning payment failures.

• 3. Create a rollback procedure

A step-by-step guide is critical to a swift and clean rollback.

• Stop new PayU traffic: Immediately stop all new traffic from being routed to PayU by updating the smart routing configuration.
• Verify fallback system: Confirm that the failover to the existing gateway is working correctly and processing new transactions without issue.
• Deploy a hotfix (if necessary): If the regression was caused by a specific code change, prepare a hotfix for a quick redeployment.
• Monitor fallback performance: Continue monitoring the previous gateway to ensure it can handle the full volume of traffic.
• Perform root cause analysis: After the immediate crisis is averted, conduct a post-mortem to determine the precise cause of the performance regression.

Communications plan
The communications plan should be transparent, timely, and empathetic. Pre-drafted messages and a clear escalation path will save critical time during an incident.

• Internal communications

Notification: Establish an automated alert system (e.g., Slack or email) to notify key internal teams immediately when a rollback is triggered.

Incident team: Define an incident response team including a communications manager, technical lead, and customer support lead.

Internal status page: Maintain an internal status page to keep all employees informed of the incident status without distracting the technical team.

• External communications

Acknowledge the issue: If the performance regression significantly affects customers, use multiple channels to acknowledge the problem quickly.

Focus on customer impact: Translate technical issues into language that customers understand. Avoid jargon like gateway timeout and instead say, Some customers may be experiencing failed payments

When transitioning to Checkout.com, a proactive and structured training program is crucial for your support team. The training should address both the common problems that arise with any payment gateway migration and the specifics of the Checkout.com platform to minimize ticket volume and improve customer satisfaction.

You should avoid making significant changes to Braintree features during major holiday periods and peak shopping seasons. Braintree, like other payment processors, does not publish a universal ""change-freeze window"" because maintenance is often handled in an agile manner, but your company should implement its own freezes to mitigate risk.

The most critical window to avoid is the Black Friday/Cyber Monday period in late November, which is a major time for retail sales. For the remainder of September and in October, it is generally safe to enable new Braintree features, but you should still follow best practices for managing risk.

Here is a step-by-step process for a least-privilege setup.

• Create a dedicated API credential

Create a new set of API credentials specifically for SIEM integration in your Adyen Customer Area. This credential should only have the permissions necessary for downloading reports and nothing else.

• Assign least-privilege roles

Ensure the new API credential has only the required permissions. The most critical role for this use case is Merchant Report Download.

• Automate report generation

Instead of relying on real-time event streams that require more complex and permissive webhooks, use Adyen's automated reporting feature to schedule and export comprehensive reports.

• Implement secure file transfer (SFTP) 

Adyen recommends SFTP for secure data distribution. This provides a secure and reliable channel to fetch the logs. 

• Configure the SIEM to ingest logs

Finally, configure your SIEM to connect to the SFTP endpoint and ingest the data.

• Create a scheduled job or use a connector in your SIEM to connect to your SFTP server.
• Configure the job to run after receiving the REPORTING webhook or on a matching schedule.
• The SIEM ingests the decrypted report files and processes the Adyen logs.