feat(evm): EIP-7851 code-controlled EOA delegation (SETSELFDELEGATE) - #12239
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feat(evm): EIP-7851 code-controlled EOA delegation (SETSELFDELEGATE)#12239MarekM25 wants to merge 1 commit into
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Adds the SETSELFDELEGATE opcode (0xf6 placeholder, 9500 gas): delegated wallet code can rewrite its EOA's designator to the ECDSA-disabled form 0xef0101 || delegate, permanently disabling the ECDSA key. Delegation following (calls) accepts both 0xef0100 and 0xef0101 designators, while sender validation (EIP-3607 path) and EIP-7702 authorization processing keep rejecting ECDSA-disabled accounts — authorizations from them are now explicitly invalid. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Changes
SETSELFDELEGATEopcode (0xf6placeholder — value is TBD in the spec; 9500 gas), gated byIsEip7851Enabled: pops a delegate address, rewrites the executing account's designator to0xef0101 || delegateand pushes 1; pushes 0 without state change for a zero delegate or when the executing account's state code is not a 23-byte designator; exceptional halt in static contextEip7851Constantswith the0xef0101ECDSA-disabled designator helpersICodeInfoRepository.TryGetDelegatedAddress) now accepts both0xef0100and0xef0101, so calls to an ECDSA-disabled EOA still execute its delegate0xef0100check, so ECDSA-authenticated transactions from0xef0101accounts are rejected as contract senders — covered by regression testsIsEip7851Enabledflag +eip7851TransitionTimestampchainspec plumbingSpec: https://eips.ethereum.org/EIPS/eip-7851 (Hegotá / EIP-8081 candidate). Not yet activated in any fork file — activation lands with the Hegotá fork wiring (#12226).
Part of the Hegotá (EIP-8081) PR series.
Types of changes
What types of changes does your code introduce?
Testing
Requires testing
If yes, did you write tests?
Notes on testing
Eip7851Tests(7): success from 0xef0100 and 0xef0101 contexts, zero-delegate failure, non-delegated-context failure, static-context halt, ECDSA-disabled sender rejection, ECDSA-disabled authorization skip. Existing 7702/delegation/transaction-processor suites pass unchanged (119 tests).Documentation
Requires documentation update
Requires explanation in Release Notes
Remarks
The opcode value is marked TBD in the EIP;
0xf6is a placeholder to revisit when the spec assigns one.🤖 Generated with Claude Code