Contracts using floating pragma

[hats-bug-reporter[bot]]

Github username: -- Twitter username: -- Submission hash (on-chain): 0x7eab7f2fb6837d2516e7b494d658617f0d003ebb5116b00b3030a4f8fff48220 Severity: low

Description: Description\ Both AtomWallet.sol and EthMultiVault.sol have used pragma solidity ^0.8.21; version.

An outdated compiler version might introduce the vulnerabilities which can affect the contracts negatively or recently released pragma versions may have unknown security vulnerabilities.

Using an outdated compiler version can be problematic especially if there are publicly disclosed bugs and issues mentioned here can affect the current compiler version.

Solidity bugs fixes for each version can be checked at https://github.com/ethereum/solidity/releases

Recommendation to fix\ Contracts should be deployed with same solidity version and Lock the solidity version in contracts and avoid using floating pragma version.

For example, if contracts intends to deployed with 0.8.21 then:

- pragma solidity ^0.8.21;
+ pragma solidity 0.8.21;