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Remove ban of EXTCODESIZE #147

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Remove ban of EXTCODESIZE #147

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4 changes: 2 additions & 2 deletions spec/eof.md
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Original file line number Diff line number Diff line change
Expand Up @@ -111,10 +111,10 @@ Code executing within an EOF environment will behave differently than legacy cod

- Execution starts at the first byte of code section 0, and `pc` is set to 0.
- `pc` is scoped to the executing code section
- The instructions `CALL`, `CALLCODE`, `DELEGATECALL`, `STATICCALL`, `SELFDESTRUCT`, `JUMP`, `JUMPI`, `PC`, `CREATE`, `CREATE2`, `CODESIZE`, `CODECOPY`, `EXTCODESIZE`, `EXTCODECOPY`, `EXTCODEHASH`, `GAS` are deprecated and rejected by validation in EOF contracts. They are only available in legacy contracts.
- The instructions `CALL`, `CALLCODE`, `DELEGATECALL`, `STATICCALL`, `SELFDESTRUCT`, `JUMP`, `JUMPI`, `PC`, `CREATE`, `CREATE2`, `CODESIZE`, `CODECOPY`, `EXTCODECOPY`, `EXTCODEHASH`, `GAS` are deprecated and rejected by validation in EOF contracts. They are only available in legacy contracts.
- When executed from a legacy contract, if the target account of `EXTCODECOPY` is an EOF contract, then it will copy up to 2 bytes from `EF00`, as if that would be the code.
- When executed from a legacy contract, if the target account of `EXTCODEHASH` is an EOF contract, then it will return `0x9dbf3648db8210552e9c4f75c6a1c3057c0ca432043bd648be15fe7be05646f5` (the hash of `EF00`, as if that would be the code).
- When executed from a legacy contract, if the target account of `EXTCODESIZE` is an EOF contract, then it will return 2.
- if the target account of `EXTCODESIZE` is an EOF contract, then it will return 2.
- The instruction `JUMPDEST` is renamed to `NOP` and remains charging 1 gas without any effect.
- Note: jumpdest-analysis is not performed anymore.
- EOF contract may not deploy legacy code (it is naturally rejected on the code validation stage)
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