What's causing the sudden increase in failed transactions on the Coinbase mobile app?

Introduction

The sudden increase in failed transactions on the Coinbase mobile app is a critical issue that demands immediate attention. As we delve into this problem, we'll employ a systematic approach to identify, validate, and address the root cause while considering both short-term fixes and long-term strategic implications.

Our analysis will follow a structured framework, covering issue identification, hypothesis generation, validation, and solution development. This approach ensures we leave no stone unturned in our quest to resolve the problem and prevent future occurrences.

Step 1

Clarifying Questions (3 minutes)

• I'm noticing the emphasis on "sudden increase." Has this spike occurred within the last 24-48 hours?

Why it matters: Timing is crucial for identifying potential triggers and narrowing down the scope of investigation. Expected answer: Yes, the increase has been observed in the last 24-48 hours. Impact on approach: A recent spike would focus our investigation on recent changes or events.

• Given the nature of Coinbase's business, I'm wondering if this increase correlates with any significant market volatility. Have there been any major cryptocurrency price fluctuations recently?

Why it matters: Market conditions can significantly impact transaction volumes and potentially system performance. Expected answer: There have been some market fluctuations, but nothing out of the ordinary. Impact on approach: If market conditions are stable, we'd focus more on internal factors.

• I'm thinking about user segments. Is this issue affecting all users equally, or are we seeing higher failure rates for specific user groups or transaction types?

Why it matters: Identifying patterns in affected users can point to specific areas of the system or user journey that may be problematic. Expected answer: The issue seems to be affecting all users, but with a slightly higher rate for high-volume traders. Impact on approach: This would lead us to investigate both general system issues and potential capacity problems during peak trading times.

• Considering the app's functionality, I'm curious about the definition of a "failed transaction." Are we seeing errors at the initiation, processing, or confirmation stage?

Why it matters: The stage at which transactions are failing can provide crucial clues about the nature of the problem. Expected answer: Most failures are occurring at the processing stage. Impact on approach: This would direct our focus to backend systems and transaction processing pipelines.

• Given that this is a mobile app issue, I'm wondering if there have been any recent app updates or changes to the API that the app relies on?

Why it matters: Recent changes are often the culprit in sudden performance issues. Expected answer: An app update was rolled out 3 days ago, but no significant API changes. Impact on approach: This would prompt a thorough review of the recent app update and its potential impact on transaction processing.