use contract api as a fallback for decoding if signature based fails

[iuwqyir]

TL;DR

Improved transaction and log decoding logic by adding fallback mechanisms and validation checks.

What changed?

• Extracted decoding logic into separate functions decodeLogsIfNeeded and decodeTransactionsIfNeeded
• Added validation to check if ABI decoding was successful by verifying name and signature fields
• Implemented fallback to contract service decoding when ABI decoding fails
• Simplified the main handler logic by consolidating decoding paths

How to test?

1. Test log decoding with valid ABI:
   • Send request with decode=true and valid event ABI
   • Verify logs are decoded correctly
2. Test transaction decoding with invalid ABI:
   • Send request with decode=true and invalid function ABI
   • Verify fallback to contract service decoding
3. Test with decoding disabled:
   • Send request with decode=false
   • Verify raw logs/transactions are returned

Why make this change?

The previous implementation didn't handle ABI decoding failures gracefully. This change ensures more reliable decoding by validating the results and falling back to the contract service when needed, improving the overall robustness of the API.

[iuwqyir]

• use consistent read when deleting data #171
• use contract api as a fallback for decoding if signature based fails #170 👈 (View in Graphite)
• fix signature handling #169
• main

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