The highly anticipated Fusaka hard fork upgrade of the Ethereum (ETH) network is scheduled to take place in the third or fourth quarter of 2025, but the controversial EVM Object Format (EOF) update will not be included in this package.
Tomasz Kajetan Stańczak, one of the co-managers of the Ethereum Foundation, recently announced that the targeted date for the significant upgrade of the Ethereum network, the Fusaka hard fork, is in the third or fourth quarter of this year. Although the exact date has not yet been finalized, it was stated that the EVM Object Format (EOF) update, which is one of the most critical parts of the upgrade, has been excluded from the package due to technical uncertainties.
Ethereum core developer Tim Beiko stated that the EOF has been removed from the Fusaka upgrade due to technical risks and the likelihood of delays in the upgrade. EOF includes a series of Ethereum Improvement Proposals (EIPs) designed for the Ethereum Virtual Machine (EVM) aimed at making smart contracts operate more efficiently. By standardizing the smart contract codes known as bytecode, EOF promised to make contracts operate more securely and quickly.
One of the significant updates discussed under EOF was the removal of the dynamically operating JUMP and JUMPI commands, which increase the risk of errors, and their replacement with the RJUMP and RJUMPI commands. With the new commands, it was planned to make smart contract bytecodes more secure, preventing unexpected bugs and the insertion of malicious software within the codes.
EOF has both strong supporters and powerful opponents in the Ethereum community. Ethereum developer Pascal Caversaccio argues that EOF is overly complex and would make the Ethereum network even more complicated.