feat(tx_cache): surface auth token retrieval errors#116
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init4samwise merged 4 commits intomainfrom Feb 8, 2026
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ENG-1798: Add BuilderTxCacheError enum to properly surface auth token retrieval failures instead of silently using an empty string. Changes: - Add BuilderTxCacheError with TokenRetrieval variant wrapping RecvError - Add TxCache variant wrapping existing TxCacheError - Replace unwrap_or_else with ? operator to propagate errors - Update local Result type alias to use BuilderTxCacheError This is a breaking change for consumers that expect the old Result type, but surfaces the actual error cause for better debugging.
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Feb 6, 2026
Fraser999
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The BuilderTxCacheError::TxCache(TxCacheError::Reqwest(err)) issue is a blocker I think.
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| assert!(matches!( | ||
| bundles, | ||
| BuilderTxCacheError::TxCache(TxCacheError::NotOurSlot) | ||
| )); |
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I don't think this matches the new behaviour, but the test is ignored, so not picked up in CI.
prestwich
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Feb 7, 2026
src/perms/tx_cache.rs
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| #[derive(Debug, Error)] | ||
| pub enum BuilderTxCacheError { | ||
| /// Failed to retrieve the authentication token. | ||
| #[error("failed to retrieve auth token: {0}")] |
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this isn't a "failed to retrieve" right? this error is permanent and persistent, and implies something has gone wrong with the background auth task resulting in the sender being dropped?
- Use TxCacheError::from(err) to properly map reqwest errors to appropriate variants (NotFound, NotOurSlot, or Reqwest) - Use core::result::Result for consistency - Improve TokenRetrieval error message to clarify it indicates the background auth task stopped
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Addressed review feedback:
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Fraser999
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It'd be good to have the test issue resolved, but that's probably not a blocker, so approving to unblock the PR.
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Summary
Surfaces auth token retrieval errors instead of silently using an empty string.
Changes
BuilderTxCacheErrorenum with:TokenRetrievalvariant wrappingwatch::error::RecvErrorTxCachevariant wrapping existingTxCacheErrorunwrap_or_elsewith?operator to propagate errorsResulttype alias to useBuilderTxCacheErrorBreaking Change
This changes the return type from
signet_tx_cache::error::Resultto a new localResulttype. Consumers will need to handle the newBuilderTxCacheErrortype.Why
Per the ticket: "Right now, an empty string is used if the token retrieval fails, placing the responsibility of returning an appropriate error on the service being called. We should wrap the original error type, and add a variant that points out that there was a problem retrieving the token instead, surfacing the inner Recv error."
Closes ENG-1798