Payments testing SDK: sharing requests without erasing business differences
Use multi-business reuse and existing subclass compatibility to explain request layering, calling contracts, and the limits of return-code retries.
Payments test APIs and shared SDK
Share request behavior across business APIs while handling protocol changes, existing callers, and retry conditions.
Reusable testability APIs and a shared SDK support money-movement scenarios and existing test suites.
Problem
Share request behavior across business APIs while handling protocol changes, existing callers, and retry conditions.
My work
Contributed to APIs and led the merchant-funds SDK refactor and compatibility work.
Engineering choice
Separate transport capabilities from business semantics: share signing, version routing, and return-code retries while keeping domain parameters and assertions explicit. Preserve old callers and constrain retries by async state and side effects.
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