Non-Fixed and Outdated Solidity Compiler Version
Description
The contract uses a floating compiler version with the caret (^) operator. This allows compilation with any Solidity version from 0.8.4 up to but not including 0.9.0. While all 0.8.x versions include important safety features like overflow checks, using floating versions can lead to non-deterministic compilation results across different development environments and deployments.
Additionally, the specified minimum version 0.8.4 is outdated. The latest stable Solidity version includes important optimizations and bug fixes
Impact
Using a floating compiler version could potentially lead to:
Inconsistent bytecode across different deployments
Missing out on compiler optimizations and security improvements
Potential introduction of bugs if compiled with different versions
Tools Used
Manual Review
Recommendations
Lock the compiler version to a specific release by removing the caret (^)
Update to the latest stable 0.8.x version
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