43 lines
3.0 KiB
Markdown
43 lines
3.0 KiB
Markdown
# Requirements Document
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## Introduction
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The WebSocket COB Data Fix is needed to address a critical issue in the trading system where WebSocket COB (Change of Basis) data processing is failing with the error `'NoneType' object has no attribute 'append'`. This error is occurring for both BTC/USDT and ETH/USDT pairs and is preventing the dashboard from functioning properly. The fix will ensure proper initialization and handling of data structures in the COB data processing pipeline.
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## Requirements
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### Requirement 1: Fix WebSocket COB Data Processing
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**User Story:** As a trader, I want the WebSocket COB data processing to work reliably without errors, so that I can monitor market data in real-time and make informed trading decisions.
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#### Acceptance Criteria
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1. WHEN WebSocket COB data is received for any trading pair THEN the system SHALL process it without throwing 'NoneType' object has no attribute 'append' errors
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2. WHEN the dashboard is started THEN all data structures for COB processing SHALL be properly initialized
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3. WHEN COB data is processed THEN the system SHALL handle edge cases such as missing or incomplete data gracefully
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4. WHEN a WebSocket connection is established THEN the system SHALL verify that all required data structures are initialized before processing data
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5. WHEN COB data is being processed THEN the system SHALL log appropriate debug information to help diagnose any issues
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### Requirement 2: Ensure Data Structure Consistency
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**User Story:** As a system administrator, I want consistent data structures throughout the COB processing pipeline, so that data can flow smoothly between components without errors.
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#### Acceptance Criteria
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1. WHEN the multi_exchange_cob_provider initializes THEN it SHALL properly initialize all required data structures
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2. WHEN the standardized_data_provider receives COB data THEN it SHALL validate the data structure before processing
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3. WHEN COB data is passed between components THEN the system SHALL ensure type consistency
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4. WHEN new COB data arrives THEN the system SHALL update the data structures atomically to prevent race conditions
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5. WHEN a component subscribes to COB updates THEN the system SHALL verify the subscriber can handle the data format
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### Requirement 3: Improve Error Handling and Recovery
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**User Story:** As a system operator, I want robust error handling and recovery mechanisms in the COB data processing pipeline, so that temporary failures don't cause the entire system to crash.
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#### Acceptance Criteria
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1. WHEN an error occurs in COB data processing THEN the system SHALL log detailed error information
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2. WHEN a WebSocket connection fails THEN the system SHALL attempt to reconnect automatically
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3. WHEN data processing fails THEN the system SHALL continue operation with the last valid data
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4. WHEN the system recovers from an error THEN it SHALL restore normal operation without manual intervention
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5. WHEN multiple consecutive errors occur THEN the system SHALL implement exponential backoff to prevent overwhelming the system |