In application development that interacts with DEXs, handling exceptional scenarios is crucial. Often, these edge cases can lead to severe financial losses, and responsibility attribution is often unclear.

This requires developers to adopt a conservative approach when designing API call logic — not only implementing basic functions but also deploying comprehensive monitoring and alerting mechanisms. Simple API timeouts are manageable, but the more unpredictable issue is when protocols return abnormal data. For example, some DEXs may return incorrect quotes or balance data due to on-chain congestion or contract bugs.

Recommended practice: perform data validation before each interaction, double-check key return values, set anomaly thresholds for alerts, and ensure timely intervention when incidents occur.