EVM Object Format or EOF Frequently Asked Questions

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This was originally posted by /u/OkDragonFruit1929 on ETHFinance and then reposted here with permission.

What is an EVM Object Format?

An EVM Object Format is a binary format used to encode information about a smart contract in Ethereum. It is used to store the compiled opcode of a contract, as well as other information such as application Binary Interface (ABI) and metadata. The format is designed to be both human-readable and machine-readable, allowing for efficient storage and retrieval of smart contract information.

What is an Opcode?

An opcode is an instruction that is executed by the Ethereum Virtual Machine (EVM). Token transfer is implemented on a higher level in smart contracts and use multiple opcodes. Transferring Ether, however, is a single opcode. Ethereum bytecode is the collection of all valid opcodes.

Please see u/0xDepositContract additional clarification here

Why is it being delayed?

The delay in the introduction of the EVM Object Format is due to a number of reasons. Chief among these reasons is that attempting to release EOF in Shanghai would delay Shanghai’s release, which would delay the release of validator withdrawal functionality. Secondly, there is a need for further development and testing of the format. Thirdly, there is a need for consensus among developers and users on the best way to deploy and use the format. Finally, there is a need for an agreement on the technical implications of using the format. All of these factors contribute to the delay in the introduction of the EVM Object Format.

Who proposed the EVM Object format?

The EVM Object format was proposed by the Ethereum Foundation. The format is part of Ethereum’s larger vision of creating an efficient and secure system for distributing and executing smart contracts. The goal is to make it easier to deploy and manage contracts, while also providing a secure environment for execution.

Where are the EVM Object Format opcodes going to be stored?

The EVM Object Format opcodes will be stored on the Ethereum blockchain. This means that they will be accessible to anyone with a node on the network. The blockchain already stores all opcodes for all smart contracts, otherwise they could not be executed. The EIP proposes changes to how the opcodes are stored, making access and execution more efficient and enabling new use cases, e.g. Account Abstraction.

edit: Please see u/0xDepositContract additional clarification here

When will EVM Object Format be released?

The EVM Object Format is currently in the process of being developed and tested. It is expected to be released sometime within the second half of 2023.







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