Fix error handling when fetching fresh token in App Check #8829
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Fixes #8822
Issue:
When calling Firebase App Check’s getToken with
forceRefresh: true
while a cached token exists, if fetching a new token failed, the error is stored ininternalError
but not returned or thrown to third-party callers. This leads to silent failures, causing the function to return a cached token instead of propagating the error.Impact:
This misleads the caller, who has no clue that the cached token was returned instead of a new one, preventing proper error handling. While the cached token may still be valid, forceRefresh is intended to fetch a new token, making this behavior inconsistent with its purpose.
Fix:
Now, when
forceRefresh
istrue
, the function returns both the error and token, ensuring failure is recognized.Why This is Correct:
This aligns with the expected behavior—if forceRefresh is requested, failures should be surfaced, not masked.
Benefit:
Allows third-party apps to handle errors properly and take proper corrective actions.