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@ -22,7 +22,7 @@ Currently this is not possible. There are two practical ways to revert a transac
## Specification
The `REVERT` instruction is introduced at `0xfd`. It expects two stack items, the top item is the `memory_offset` followed by `memory_length`. It does not produce any stack elements because it stops execution.
On blocks with `block.number >= BYZANTIUM_FORK_BLKNUM`, the `REVERT` instruction is introduced at `0xfd`. It expects two stack items, the top item is the `memory_offset` followed by `memory_length`. It does not produce any stack elements because it stops execution.
The semantics of `REVERT` with respect to memory and memory cost are identical to those of `RETURN`. The sequence of bytes given by `memory_offset` and `memory_length` is called "error message" in the following.
@ -55,4 +55,4 @@ should:
## Copyright
Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).
Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).