fix: rip-7212 implementation incorrect return value

[ulerdogan]

Pull Request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build-related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

The current implementation doesn't meet with actual RIP-7212 behavior for the return values. It returns unwanted 0 value for some cases.

Resolves: #

What is the new behavior?

The changes apply true behavior for the RIP-7212.

- **Output data:**
    - If the signature verification process succeeds, it returns 1 in 32 bytes format.
    - If the signature verification process fails, it does not return any output data.

Does this introduce a breaking change?

• Yes
• No

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This change is 

[enitrat]

lgtm ❤️