ethereum.arrow_glacier.vm.precompiled_contracts.identity
Ethereum Virtual Machine (EVM) IDENTITY PRECOMPILED CONTRACT ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.. contents:: Table of Contents :backlinks: none :local:
Introduction
Implementation of the IDENTITY
precompiled contract.
identity
Writes the message data to output.
Parameters
evm : The current EVM frame.
def identity(evm: Evm) -> None:
22 | """ |
---|---|
23 | Writes the message data to output. |
24 |
|
25 | Parameters |
26 | ---------- |
27 | evm : |
28 | The current EVM frame. |
29 | """ |
30 | data = evm.message.data |
31 | |
32 | # GAS |
33 | word_count = ceil32(Uint(len(data))) // 32 |
34 | charge_gas(evm, GAS_IDENTITY + GAS_IDENTITY_WORD * word_count) |
35 | |
36 | # OPERATION |
37 | evm.output = data |