When Verified Source Lies

📰 Hackernoon

Etherscan verification does not guarantee bytecode accuracy due to Solidity optimizer bugs

intermediate Published 27 Mar 2026

Action Steps

Understand the difference between source code and compiled bytecode
Be aware of known Solidity optimizer bugs like SOL-2022-7
Verify bytecode manually or use additional tools to confirm accuracy

Who Needs to Know This

Developers and auditors on a blockchain project team benefit from understanding the limitations of Etherscan verification to ensure the security and integrity of their smart contracts

Key Insight

💡 Etherscan verification only confirms build reproducibility, not bytecode behavior