Verifying Real Ethereum Bytecode Without Trusting Compilers

If you hang around Ethereum long enough, you know smart contracts are ultimate law once deployed. But how do we actually know that raw compiled bytecode on the blockchain will behave as expected without hidden bugs? I came across a fascinating new study that tackles this exact challenge. The researchers set out to mathematically prove the behavior of raw bytecode without relying on compiler assumptions or simplified machine models.

To do this, the authors built a verification tool named Blanc and an EVM engine named Jaune, which passed all 34,205 relevant Ethereum test cases. They analyzed eight real code artifacts deployed from 2017 to 2026 that were produced by seven compiler versions and an assembler. Their proofs confirmed core security guarantees for the EIP-7002 contract, a Uniswap V2 pair and WETH9 withdrawals, matching exact gas usage across 3,748 mainnet receipts over 30,000 blocks. They also tested Curve pool bytecode to show how fixed compiler output successfully blocks the reentrancy exploit from 2023. Impressively, AI agents generated these proofs in fifteen days under the direction of one author.

If you want the full details, the paper is called Verifying deployed bytecode against executable EVM semantics, with exact gas and no added axioms and it was written by Seulkee Baek. You can find it at arxiv.org/abs/2610.19764.

This is not financial advice. The information provided is for educational and informational purposes only.

The cover image was generated by AI.