The POST /api/transaction/setTransactionMemo API method allows users to add or update a memo for a specific card transaction. By providing the unique transaction ID and the desired memo text, users can enhance the tracking and organization of their transactions.

Functionality:

Adds or updates a memo for a specified transaction by its transaction ID.
Allows users to customize transaction records for easier tracking and categorization.
Requires user authentication and authorization for secure access to transaction data.

Key Features:

Transaction Customization: Provides users the ability to add or modify memos for individual transactions, improving personal record-keeping.
Ease of Use: Users can quickly update transaction details without altering the original transaction data.
Secure Access: Ensures that only authenticated and authorized users can modify transaction memos.
Error Handling: Provides clear error responses for missing or invalid transaction IDs or authentication failures.

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This API is useful for users who need additional notes for their transactions, offering a simple and secure way to manage transaction-related memos.