.. py:module:: ethereum.byzantium.vm.precompiled_contracts.modexp

Ethereum Virtual Machine (EVM) MODEXP PRECOMPILED CONTRACT
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

.. contents:: Table of Contents
    :backlinks: none
    :local:

Introduction
------------

Implementation of the `MODEXP` precompiled contract.


.. only:: stage1

Module Contents
---------------


Functions
~~~~~~~~~

.. autoapisummary::
   :nosignatures:

   ethereum.byzantium.vm.precompiled_contracts.modexp.modexp
   ethereum.byzantium.vm.precompiled_contracts.modexp.get_mult_complexity



Attributes
~~~~~~~~~~

.. autoapisummary::

   ethereum.byzantium.vm.precompiled_contracts.modexp.GQUADDIVISOR


Module Details
---------------

GQUADDIVISOR
~~~~~~~~~~~~



.. py:data:: GQUADDIVISOR
   
   

.. undocinclude:: /../src/ethereum/byzantium/vm/precompiled_contracts/modexp.py
   :language: python
   :lines: 20-20


modexp
~~~~~~


.. function:: modexp(evm: ethereum.byzantium.vm.Evm) -> None
   :noindexentry:

   Calculates `(base**exp) % modulus` for arbitary sized `base`, `exp` and.
   `modulus`. The return value is the same length as the modulus.




.. undocinclude:: /../src/ethereum/byzantium/vm/precompiled_contracts/modexp.py
   :language: python
   :pyobject: modexp

get_mult_complexity
~~~~~~~~~~~~~~~~~~~


.. function:: get_mult_complexity(x: ethereum.base_types.Uint) -> ethereum.base_types.Uint
   :noindexentry:

   Estimate the complexity of performing Karatsuba multiplication.




.. undocinclude:: /../src/ethereum/byzantium/vm/precompiled_contracts/modexp.py
   :language: python
   :pyobject: get_mult_complexity