EIP-8163
Reserve `EXTENSION (0xae)` opcode
Reserve an opcode to be used as an extension prefix in non-Ethereum-L1 EVM chains
ReviewSplurge
Status history
- Draft13 Feb 2026
- Reviewdate not observed
Abstract
Reserve an opcode EXTENSION (0xae) which will be guaranteed to not become a valid opcode on Ethereum L1 EVM, but which will be available to be used in other EVMs as a prefix to encode extension instructions.