The contracts OracleLib, DecentralizedStableCoin, and DSCEngine are using a floating pragma statement pragma solidity ^0.8.18;. While this is not necessarily a vulnerability, it could potentially introduce backward compatibility issues if a new version of the Solidity compiler introduces breaking changes.
Vulnerability Details
This statement indicates that the contract can be compiled with any Solidity compiler version from 0.8.18 to versions below 0.9.0. While this provides flexibility in using different compiler versions, it could potentially introduce backward compatibility issues if a new version of the Solidity compiler introduces breaking changes.
Tools Used
Manual review
Recommendations
Consider using a fixed version pragma statement to avoid potential issues related to compiler changes.
Usage of floating pragma statement
Severity
Gas Optimization / Informational
Relevant GitHub Links
https://github.com/Cyfrin/2023-07-foundry-defi-stablecoin/blob/main/src/libraries/OracleLib.sol#L3
https://github.com/Cyfrin/2023-07-foundry-defi-stablecoin/blob/main/src/DSCEngine.sol#L24
https://github.com/Cyfrin/2023-07-foundry-defi-stablecoin/blob/main/src/DecentralizedStableCoin.sol#L24
Summary
The contracts
OracleLib,DecentralizedStableCoin, andDSCEngineare using a floating pragma statement pragmasolidity ^0.8.18;. While this is not necessarily a vulnerability, it could potentially introduce backward compatibility issues if a new version of the Solidity compiler introduces breaking changes.Vulnerability Details
This statement indicates that the contract can be compiled with any Solidity compiler version from
0.8.18to versions below0.9.0. While this provides flexibility in using different compiler versions, it could potentially introduce backward compatibility issues if a new version of the Solidity compiler introduces breaking changes.Tools Used
Manual review
Recommendations
Consider using a fixed version pragma statement to avoid potential issues related to compiler changes.