Refactor error handling and recategorize errors #295
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Categorized errors into FatalError, ExternalError, and UserError. FatalError, ExternalError, and UserError implement Unwrap(). The word "pluggable" here describes interfaces or callback functions that can potentially be implemented by external packages. Basically, when Atree: - creates an error, create either FatalError or UserError. - receives error from known packages, wrap the error in FatalError or UserError. - receives error from pluggable interfaces or callback functions, wrap the error as ExternalError only if it is not categorized already. - receives error from its own functions, then there's no need to categorize error because it's already categorized. Just wrap the error with more context if needed. Pluggable interfaces include: - Ledger - BaseStorage - SlabStorage - TypeInfo - Value - Storable - DigesterBuilder - Digester Pluggable callback functions include: - StorableDecoder - TypeInfoDecoder - ValueComparator - StorableComparator - HashInputProvider - ArrayElementProvider - MapElementProvider - ArrayIterationFunc - MapEntryIterationFunc - MapElementIterationFunc
Codecov Report
@@ Coverage Diff @@
## main #295 +/- ##
==========================================
- Coverage 69.05% 64.62% -4.44%
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Files 14 14
Lines 7314 7991 +677
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+ Hits 5051 5164 +113
- Misses 1629 2152 +523
- Partials 634 675 +41
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SupunS
approved these changes
Mar 10, 2023
Co-authored-by: Supun Setunga <supun.setunga@gmail.com>
turbolent
approved these changes
Mar 22, 2023
| } | ||
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| if len(b) != storageIDSize { | ||
| return nil, NewStorageIDErrorf("incorrect storage id buffer length %d", len(b)) | ||
| id, err := NewStorageIDFromRawBytes(b) |
| @@ -552,11 +575,23 @@ func (e *singleElement) Get(storage SlabStorage, _ Digester, _ uint, _ Digest, c | |||
| // | |||
| // Rehashing only happens when we create new inlineCollisionGroup. | |||
| // Adding new element to existing inlineCollisionGroup doesn't require rehashing. | |||
| func (e *singleElement) Set(storage SlabStorage, address Address, b DigesterBuilder, digester Digester, level uint, hkey Digest, comparator ValueComparator, hip HashInputProvider, key Value, value Value) (element, MapValue, error) { | |||
| func (e *singleElement) Set( | |||
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Changes
This PR improves error handling and error passing between Atree, Cadence, and FVM.
FatalError,ExternalError, andUserError.Unwrap()forFatalError,ExternalError, andUserError.Closes #285
Updates onflow/cadence#1255
Details
Errors are categorized as early as feasible. Changes only affect the error paths (avoids affecting the happy paths).
Here, the word "pluggable" describes interfaces or callback functions that might be implemented by packages external to Atree.
Basically, when Atree:
Pluggable interfaces:
LedgerBaseStorageSlabStorageTypeInfoValueStorableDigesterBuilderDigesterPluggable callback functions:
StorableDecoderTypeInfoDecoderValueComparatorStorableComparatorHashInputProviderArrayElementProviderMapElementProviderArrayIterationFuncMapEntryIterationFuncMapElementIterationFuncmainbranchFiles changedin the Github PR explorer