SomberNight 731756f6e8 dns hacks: use a default timeout of 30 sec for dns requests
dnspython changed the overall timeout for a request from 30 sec to 5 sec in version 2.0
(see 7ed1648b84 )

5 seconds is not enough in some network conditions...
We manually set the timeout back to 30 sec.

Note that in case these dns hacks are applied, and the timeout is reached,
we fallback to the system dns resolver, which hopefully can get a response.

-----

log was full of:

I | dns_hacks | dnspython failed to resolve dns (AAAA) for 'electrum.org' with error: Timeout('The DNS operation timed out after 5.000827789306641 seconds')
I | dns_hacks | dnspython failed to resolve dns (A) for 'electrum.org' with error: Timeout('The DNS operation timed out after 5.000998020172119 seconds')
I | dns_hacks | dnspython failed to resolve dns (AAAA) for 'electrum.hsmiths.com' with error: Timeout('The DNS operation timed out after 5.000227451324463 seconds')
I | dns_hacks | dnspython failed to resolve dns (A) for 'electrum.hsmiths.com' with error: Timeout('The DNS operation timed out after 5.000523328781128 seconds')
...
2020-12-22 10:48:10 +01:00
2019-09-04 12:39:02 +02:00
2020-12-18 19:15:45 +01:00
2020-12-11 15:53:33 +01:00
2020-12-18 19:40:39 +01:00
2019-12-06 21:47:28 +01:00
2020-03-04 20:33:02 +01:00

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

::

  Licence: MIT Licence
  Author: Thomas Voegtlin
  Language: Python (>= 3.6)
  Homepage: https://electrum.org/


.. image:: https://travis-ci.org/spesmilo/electrum.svg?branch=master
    :target: https://travis-ci.org/spesmilo/electrum
    :alt: Build Status
.. image:: https://coveralls.io/repos/github/spesmilo/electrum/badge.svg?branch=master
    :target: https://coveralls.io/github/spesmilo/electrum?branch=master
    :alt: Test coverage statistics
.. image:: https://d322cqt584bo4o.cloudfront.net/electrum/localized.svg
    :target: https://crowdin.com/project/electrum
    :alt: Help translate Electrum online





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



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`.
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