Feature: Enhanced Error Handling and Retry Logic

[pomadev]

Description

Implement robust error handling with intelligent retry mechanisms to ensure the bot can recover from temporary failures and provide detailed diagnostics when permanent failures occur.

Implementation Details

• Implement exponential backoff for retries
• Create error categorization system
• Add dead letter queue for failed purchases
• Enhance error notifications with actionable information

Key Features

1. Intelligent Retry Logic

   • Exponential backoff with jitter
   • Different retry strategies for different error types
   • Maximum retry limits with circuit breaker

2. Error Categorization

   • Network errors (retry immediately)
   • API rate limits (retry with backoff)
   • Insufficient funds (notify, don't retry)
   • Invalid API credentials (notify, halt)
   • Exchange maintenance (retry later)

3. Dead Letter Queue

   • Store failed purchase attempts
   • Manual retry capability
   • Automatic retry after conditions improve
   • Detailed failure analysis

4. Enhanced Notifications

   • Specific error descriptions
   • Suggested actions for resolution
   • Error frequency tracking
   • Escalation for critical errors

Acceptance Criteria

• All API calls have proper retry logic
• Errors are categorized correctly
• Retry attempts are logged
• Dead letter queue stores failed attempts
• Notifications include actionable information
• Circuit breaker prevents cascade failures
• Error metrics are tracked
• Recovery procedures are documented

Error Handling Example

type ErrorCategory int

const (
    NetworkError ErrorCategory = iota
    RateLimitError
    InsufficientFundsError
    AuthenticationError
    ExchangeMaintenanceError
    UnknownError
)

type RetryConfig struct {
    MaxAttempts     int
    InitialDelay    time.Duration
    MaxDelay        time.Duration
    Multiplier      float64
    Jitter          float64
}

Technical Considerations

• Use context for timeout management
• Implement proper error wrapping
• Consider using a message queue for dead letters
• Monitor error rates and patterns
• Plan for graceful degradation

Priority: High
Estimated Effort: Medium