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# Error Handling
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Functions for formatting GraphQL errors and extracting error information for client responses.
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## Capabilities
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### Error Formatting
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```python { .api }
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def format_error(error: Exception, debug: bool = False) -> dict:
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    """
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    Format GraphQL error for client response.
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    Parameters:
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    - error: Exception to format
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    - debug: Include debug information
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    Returns:
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    Formatted error dict with message, locations, path
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    """
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def get_error_extension(error: Exception) -> Optional[dict]:
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    """Extract extension data from error."""
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def get_formatted_error_context(error: dict) -> Optional[Any]:
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    """Get context information from formatted error."""
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def get_formatted_error_traceback(error: dict) -> Optional[str]:
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    """Get traceback from formatted error."""
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def unwrap_graphql_error(error: Exception) -> Exception:
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    """Unwrap GraphQL error to get original exception."""
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```
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## Usage Examples
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```python
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from ariadne import format_error
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# Custom error formatting
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def custom_error_formatter(error, debug=False):
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    formatted = format_error(error, debug)
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    formatted["timestamp"] = datetime.now().isoformat()
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    return formatted
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```