Electrum - Lightweight Bitcoin client
=====================================

::

  Licence: MIT Licence
  Author: Thomas Voegtlin
  Language: Python (>= 3.8)
  Homepage: https://electrum.org/


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Getting started
===============

(*If you've come here looking to simply run Electrum,* `you may download it here`_.)

.. _you may download it here: https://electrum.org/#download

Electrum itself is pure Python, and so are most of the required dependencies,
but not everything. The following sections describe how to run from source, but here
is a TL;DR::

    sudo apt-get install libsecp256k1-0
    python3 -m pip install --user ".[gui,crypto]"


Not pure-python dependencies
----------------------------

If you want to use the Qt interface, install the Qt dependencies::

    sudo apt-get install python3-pyqt5

For elliptic curve operations, `libsecp256k1`_ is a required dependency::

    sudo apt-get install libsecp256k1-0

Alternatively, when running from a cloned repository, a script is provided to build
libsecp256k1 yourself::

    sudo apt-get install automake libtool
    ./contrib/make_libsecp256k1.sh

Due to the need for fast symmetric ciphers, `cryptography`_ is required.
Install from your package manager (or from pip)::

    sudo apt-get install python3-cryptography


If you would like hardware wallet support, see `this`_.

.. _libsecp256k1: https://github.com/bitcoin-core/secp256k1
.. _pycryptodomex: https://github.com/Legrandin/pycryptodome
.. _cryptography: https://github.com/pyca/cryptography
.. _this: https://github.com/spesmilo/electrum-docs/blob/master/hardware-linux.rst

Running from tar.gz
-------------------

If you downloaded the official package (tar.gz), you can run
Electrum from its root directory without installing it on your
system; all the pure python dependencies are included in the 'packages'
directory. To run Electrum from its root directory, just do::

    ./run_electrum

You can also install Electrum on your system, by running this command::

    sudo apt-get install python3-setuptools python3-pip
    python3 -m pip install --user .

This will download and install the Python dependencies used by
Electrum instead of using the 'packages' directory.
It will also place an executable named :code:`electrum` in :code:`~/.local/bin`,
so make sure that is on your :code:`PATH` variable.


Development version (git clone)
-------------------------------

Check out the code from GitHub::

    git clone git://github.com/spesmilo/electrum.git
    cd electrum
    git submodule update --init

Run install (this should install dependencies)::

    python3 -m pip install --user -e .


Create translations (optional)::

    sudo apt-get install python-requests gettext
    ./contrib/pull_locale

Finally, to start Electrum::

    ./run_electrum

Run unit tests with `pytest`:

    pytest electrum/tests -v

To run a single file, specify it directly like this:

    pytest electrum/tests/test_bitcoin.py -v

Creating Binaries
=================

Linux (tarball)
---------------

See :code:`contrib/build-linux/sdist/README.md`.


Linux (AppImage)
----------------

See :code:`contrib/build-linux/appimage/README.md`.


Mac OS X / macOS
----------------

See :code:`contrib/osx/README.md`.


Windows
-------

See :code:`contrib/build-wine/README.md`.


Android
-------

See :code:`contrib/android/Readme.md`.


Contributing
============

Any help testing the software, reporting or fixing bugs, reviewing pull requests
and recent changes, writing tests, or helping with outstanding issues is very welcome.
Implementing new features, or improving/refactoring the codebase, is of course
also welcome, but to avoid wasted effort, especially for larger changes,
we encourage discussing these on the issue tracker or IRC first.

Besides `GitHub`_, most communication about Electrum development happens on IRC, in the
:code:`#electrum` channel on Libera Chat. The easiest way to participate on IRC is
with the web client, `web.libera.chat`_.


.. _web.libera.chat: https://web.libera.chat/#electrum
.. _GitHub: https://github.com/spesmilo/electrum