Summary

The contract is set to be deployed on Arbitrum chain but the solidity version 0.8.20 has opcode PUSH0 which is not supported on Arbitrum, thus it cannot be deployed.

Vulnerability Details

Solc compiler version 0.8.20 switches the default target EVM version to Shanghai, which means that the generated bytecode will include PUSH0 opcodes. Be sure to select the appropriate EVM version in case you intend to deploy on a chain other than mainnet like L2 chains that may not support PUSH0, otherwise deployment of your contracts will fail.

Impact

The impact of using the solidity version 0.8.20 is that it comes with the PUSH0 opcode and this opcode is not supported on Arbitrum causing the smart contract to malfunction and the contract may not execute correctly.

Tools Used

Aderyn

Recommendations

PUSH0 opcode comes with 0.8.20 and higher versions, therefore switching to 0.8.19 will make the smart contract fully compatible to be deployed on Arbitrum chain.