Parse and Validate Transaction Stream | Dataford Interview Questions

Write a clean, well-tested function to parse and validate a stream of incoming transaction payloads, ensuring robust error handling for malformed data.

Implement parse_transaction_stream(payloads), where payloads is a list of JSON strings. Each valid payload must be an object containing a non-empty string transaction_id, a non-negative integer amount, and a three-letter uppercase currency; extra fields are allowed. Return valid decoded objects and indexed error messages while continuing after malformed payloads.

Constraints

0 <= len(payloads) <= 1000
Each payload is normally a JSON string, but malformed test inputs may include non-string values
A valid payload is a JSON object with transaction_id, amount, and currency
amount is an integer in the range 0 through 10^18
Extra object fields must be preserved

Function Signature

def parse_transaction_stream(payloads):

Your question is Parse and Validate Transaction Stream. Start with the requirements in the Question tab.

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Problem

Write a clean, well-tested function to parse and validate a stream of incoming transaction payloads, ensuring robust error handling for malformed data.

Constraints

0 <= len(payloads) <= 1000
Each payload is normally a JSON string, but malformed test inputs may include non-string values
A valid payload is a JSON object with transaction_id, amount, and currency
amount is an integer in the range 0 through 10^18
Extra object fields must be preserved

Function Signature

def parse_transaction_stream(payloads):

Your question is Parse and Validate Transaction Stream. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.