fix: proof display implemenation hides deserialization errors

[shumkov]

Issue being fixed or feature implemented

The proof display implementation should return an error if we can't deserialize element

What was done?

• Return formatter error in deserialization fails

How Has This Been Tested?

With DET

Breaking Changes

None

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have made corresponding changes to the documentation

For repository code-owners and collaborators only

• I have assigned this pull request to a milestone

Summary by CodeRabbit

• Tests
  • Introduced new tests to ensure reliable data conversion and consistency during serialization and deserialization.
• Refactor
  • Enhanced error handling in proof verification and formatting operations, promoting more robust and graceful management of conversion failures.

[coderabbitai]

Walkthrough

This update adds a new test case for verifying the serialization and deserialization of a CountTree in the element module. Additionally, it enhances error handling in the proof modules by updating multiple function signatures to return Result<String, fmt::Error> and propagating errors with the ? operator. These changes improve robustness in converting operations, nodes, and hexadecimal strings to their string representations.

Changes

File(s)	Change Summary
grovedb/.../element/serialize.rs	Added a new test case for CountTree serialization: includes a new import for StorageFlags, creates a CountTree, serializes/deserializes it, and verifies the output and length.
grovedb/.../operations/proof/{mod.rs,util.rs}	Modified function signatures in error conversion logic to return Result<String, fmt::Error> instead of String, using the ? operator to propagate errors in decoding and formatting.

Possibly related PRs

• feat: serde support for a basic structs #344: Connects to previous modifications for Serde support in the Element type by addressing serialization enhancements.

Suggested reviewers

• QuantumExplorer
• fominok

Poem

I'm a rabbit hopping through lines of code,
Testing and proving in serialization mode.
CountTrees and errors, all handled with care,
My little paws check each byte that's there.
With a hop and a skip, the changes are fun—
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Review profile: CHILL
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📥 Commits

Reviewing files that changed from the base of the PR and between f89e03e and 8a36b23.

📒 Files selected for processing (3)

• grovedb/src/element/serialize.rs (2 hunks)
• grovedb/src/operations/proof/mod.rs (3 hunks)
• grovedb/src/operations/proof/util.rs (3 hunks)

⏰ Context from checks skipped due to timeout of 90000ms (4)

• GitHub Check: Compilation errors
• GitHub Check: Code Coverage
• GitHub Check: Tests
• GitHub Check: Linting

🔇 Additional comments (10)

grovedb/src/element/serialize.rs (2)

51-51: Good addition of StorageFlags import for the new test case.

The StorageFlags import from grovedb_epoch_based_storage_flags properly supports the new CountTree test case.

---

158-191: Well-structured test case for CountTree serialization/deserialization.

This test case thoroughly exercises serialization and deserialization of the CountTree element type, which enhances test coverage. The test properly:

1. Creates a CountTree with controlled values
2. Serializes and deserializes it
3. Verifies equality between original and deserialized objects
4. Compares with a known serialized representation

Consider removing debug print statements (dbg!) before merging to production.

grovedb/src/operations/proof/util.rs (4)

54-54: Error handling improved with proper propagation.

Changed to use the ? operator to properly propagate errors from the updated optional_element_hex_to_ascii function.

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92-93: Error handling improved with proper propagation.

Changed to use the ? operator to properly propagate errors from the updated element_hex_to_ascii function.

---

318-322: Improved error handling in optional_element_hex_to_ascii.

Function signature now returns Result<String, fmt::Error> instead of String, allowing for proper error propagation when deserialization fails. This addresses the objective of the PR to fix proof display hide errors.

---

325-329: Enhanced error handling in element_hex_to_ascii.

The function now properly returns a Result<String, fmt::Error> and uses map_err to convert deserialization errors into formatting errors. This change ensures that deserialization failures are properly handled and reported, rather than silently failing.

grovedb/src/operations/proof/mod.rs (4)

188-188: Error handling improved with proper propagation.

Updated to use the ? operator to propagate errors from the modified decode_merk_proof function.

---

222-238: Enhanced error handling in decode_merk_proof.

Function signature changed to return Result<String, fmt::Error> instead of String, consistent with the PR's objective to fix error handling in proof display.

---

240-251: Improved error handling in op_to_string.

Function now returns Result<String, fmt::Error> and properly handles errors from node_to_string using the ? operator, aligning with the error handling improvements throughout the codebase.

---

253-291: Enhanced error handling in node_to_string.

Function now returns Result<String, fmt::Error> and properly propagates errors from element_hex_to_ascii. This completes the chain of error handling improvements throughout the codebase, ensuring deserialization errors are properly reported.

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