Grokking Modern Mobile System Design Interview
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Networking Library

Design a networking library that centralizes request construction, authentication, caching, retries, and diagnostics. The goal is consistent behavior across callers, not a wrapper that hides every important failure.

1. Define requests and results

Request: method, destination, headers, body source,
         account scope, deadline, priority, retry contract
Result: status, headers, decoded value or typed failure,
        operation and attempt timing
Transport: execute one prepared attempt

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