Summary

The Solidity version 0.8.20 introduces the new PUSH0 opcode, which is incompatible with the Arbitrum.

Vulnerability Details

As indicated in the contest details, the deployed contracts will be on the following chains:

The contracts are using the version ^0.8.20 of the compiler.

Solidity version 0.8.20 and higher are incompatible with the Arbitrum due to the introduction of the new PUSH0 opcode.

• Arbitrum resource: https://docs.arbitrum.io/for-devs/concepts/differences-between-arbitrum-ethereum/solidity-support

Impact

Contracts deployed on Arbitrum may not function as intended or not work.

Tools Used

Manual Review.

Recommendations

Change the compiler version to 0.8.19 or lower.