Improve envvar docs
This commit is contained in:
Neil Booth
parent
b33cf8b8ce
commit
8c54111139
@ -16,188 +16,194 @@ must set **HOST** appropriately; see below.
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Required
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--------
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========
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These environment variables are always required:
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* **COIN**
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.. envvar:: COIN
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Must be a *NAME* from one of the **Coin** classes in
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Must be a :attr:`NAME` from one of the :class:`Coin` classes in
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`lib/coins.py`_.
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* **DB_DIRECTORY**
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.. envvar:: DB_DIRECTORY
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The path to the database directory. Relative paths should be
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relative to the parent process working directory. This is the
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directory of the `run` script if you use it.
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* **DAEMON_URL**
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.. envvar:: DAEMON_URL
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A comma-separated list of daemon URLs. If more than one is provided
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ElectrumX will initially connect to the first, and failover to
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subsequent ones round-robin style if one stops working.
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The generic form of a daemon URL is:
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The generic form of a daemon URL is::
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`http://username:password@hostname:port/`
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http://username:password@hostname:port/
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The leading `http://` is optional, as is the trailing slash. The
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`:port` part is also optional and will default to the standard RPC
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port for **COIN** and **NET** if omitted.
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The leading ``http://`` is optional, as is the trailing slash. The
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``:port`` part is also optional and will default to the standard RPC
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port for :envvar:`COIN` and :envvar:`NET` if omitted.
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For the `run` script
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--------------------
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For the ``run`` script
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======================
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The following are required if you use the `run` script:
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The following are required if you use the ``run`` script:
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* **ELECTRUMX**
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.. envvar:: ELECTRUMX
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The path to the electrumx_server.py script. Relative paths should
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be relative to the directory of the `run` script.
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be relative to the directory of the ``run`` script.
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* **USERNAME**
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.. envvar:: USERNAME
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The username the server will run as.
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Miscellaneous
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-------------
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=============
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These environment variables are optional:
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* **LOG_FORMAT**
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.. envvar:: LOG_FORMAT
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The Python logging `format string
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<https://docs.python.org/3/library/logging.html#logrecord-attributes>`_
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to use. Defaults to `%(levelname)s:%(name)s:%(message)s`.
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to use. Defaults to ``%(levelname)s:%(name)s:%(message)s``.
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* **ALLOW_ROOT**
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.. envvar:: ALLOW_ROOT
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Set this environment variable to anything non-empty to allow running
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ElectrumX as root.
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* **NET**
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.. envvar:: NET
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Must be a *NET* from one of the **Coin** classes in `lib/coins.py`_.
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Defaults to `mainnet`.
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Must be a :envvar:`NET` from one of the **Coin** classes in
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`lib/coins.py`_. Defaults to ``mainnet``.
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* **DB_ENGINE**
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.. envvar:: DB_ENGINE
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Database engine for the UTXO and history database. The default is
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`leveldb`. The other alternative is `rocksdb`. You will need to
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install the appropriate python package for your engine. The value
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is not case sensitive.
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``leveldb``. The other alternative is ``rocksdb``. You will need
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to install the appropriate python package for your engine. The
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value is not case sensitive.
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* **HOST**
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.. envvar:: HOST
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The host or IP address that the TCP and SSL servers will use when
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binding listening sockets. Defaults to `localhost`. To listen on
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binding listening sockets. Defaults to ``localhost``. To listen on
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multiple specific addresses specify a comma-separated list. Set to
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an empty string to listen on all available interfaces (likely both
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IPv4 and IPv6).
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* **TCP_PORT**
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.. envvar:: TCP_PORT
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If set ElectrumX will serve TCP clients on **HOST**:**TCP_PORT**.
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If set ElectrumX will serve TCP clients on
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:envvar:`HOST`\::envvar:`TCP_PORT`.
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**Note**: ElectrumX will not serve TCP connections until it has
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fully caught up with your daemon.
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.. note:: ElectrumX will not serve TCP connections until it has
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fully caught up with your daemon.
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* **SSL_PORT**
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.. envvar:: SSL_PORT
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If set ElectrumX will serve SSL clients on **HOST**:**SSL_PORT**.
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If set then SSL_CERTFILE and SSL_KEYFILE must be defined and be
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filesystem paths to those SSL files.
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If set ElectrumX will serve SSL clients on
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:envvar:`HOST`\::envvar:`SSL_PORT`. If set then
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:envvar:`SSL_CERTFILE` and :envvar:`SSL_KEYFILE` must be defined
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environment variables with values the filesystem paths to those SSL
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files.
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**Note**: ElectrumX will not serve SSL connections until it has
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fully caught up with your daemon.
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.. note:: ElectrumX will not serve SSL connections until it has
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fully caught up with your daemon.
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* **RPC_HOST**
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.. envvar:: RPC_HOST
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The host or IP address that the RPC server will listen on and
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defaults to `localhost`. To listen on multiple specific addresses
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defaults to ``localhost``. To listen on multiple specific addresses
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specify a comma-separated list. Servers with unusual networking
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setups might want to specify e.g. `::1` or `127.0.0.1` explicitly
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rather than defaulting to `localhost`.
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setups might want to specify e.g. ``::1`` or ``127.0.0.1``
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explicitly rather than defaulting to ``localhost``.
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An empty string (normally indicating all interfaces) is interpreted
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as `localhost`, because allowing access to the server's RPC
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interface to arbitrary connections across the internet is not a
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good idea.
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as ``localhost``, because allowing access to the server's RPC
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interface to arbitrary connections across the internet is not a good
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idea.
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* **RPC_PORT**
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.. envvar:: RPC_PORT
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ElectrumX will listen on this port for local RPC connections.
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ElectrumX listens for RPC connections unless this is explicitly set
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to blank. The default depends on **COIN** and **NET** (e.g., 8000
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for Bitcoin mainnet) if not set, as indicated in `lib/coins.py`_.
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to blank. The default depends on :envvar:`COIN` and :attr:`NET`
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(e.g., 8000 for Bitcoin mainnet) if not set, as indicated in
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`lib/coins.py`_.
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* **DONATION_ADDRESS**
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.. envvar:: DONATION_ADDRESS
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The server donation address reported to Electrum clients. Defaults
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to empty, which Electrum interprets as meaning there is none.
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* **BANNER_FILE**
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.. envvar:: BANNER_FILE
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The path to a banner file to serve to clients in Electrum's
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"Console" tab. Relative file paths must be relative to
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**DB_DIRECTORY**. The banner file is re-read for each new client.
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:envvar:`DB_DIRECTORY`. The banner file is re-read for each new
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client.
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You can place several meta-variables in your banner file, which will be
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replaced before serving to a client.
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+ **$SERVER_VERSION** is replaced with the ElectrumX version you are
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running, such as *1.0.10*.
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+ **$SERVER_SUBVERSION** is replaced with the ElectrumX user agent
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string. For example, `ElectrumX 1.0.10`.
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+ **$DAEMON_VERSION** is replaced with the daemon's version as a
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dot-separated string. For example *0.12.1*.
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+ **$DAEMON_SUBVERSION** is replaced with the daemon's user agent
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string. For example, `/BitcoinUnlimited:0.12.1(EB16; AD4)/`.
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+ **$DONATION_ADDRESS** is replaced with the address from the
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**DONATION_ADDRESS** environment variable.
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+ ``$SERVER_VERSION`` is replaced with the ElectrumX version you are
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running, such as ``1.0.10``.
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+ ``$SERVER_SUBVERSION`` is replaced with the ElectrumX user agent
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string. For example, ``ElectrumX 1.0.10``.
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+ ``$DAEMON_VERSION`` is replaced with the daemon's version as a
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dot-separated string. For example ``0.12.1``.
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+ ``$DAEMON_SUBVERSION`` is replaced with the daemon's user agent
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string. For example, ``/BitcoinUnlimited:0.12.1(EB16; AD4)/``.
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+ ``$DONATION_ADDRESS`` is replaced with the address from the
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:envvar:`DONATION_ADDRESS` environment variable.
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See https://github.com/shsmith/electrumx-banner-updater for a script
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that updates a banner file periodically with useful statistics about
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fees, last block time and height, etc.
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See `here <https://github.com/shsmith/electrumx-banner-updater>`_
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for a script that updates a banner file periodically with useful
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statistics about fees, last block time and height, etc.
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* **TOR_BANNER_FILE**
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.. envvar:: TOR_BANNER_FILE
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As for **BANNER_FILE** (which is also the default) but shown to
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incoming connections believed to be to your Tor hidden service.
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As for :envvar:`BANNER_FILE` (which is also the default) but shown
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to incoming connections believed to be to your Tor hidden service.
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* **ANON_LOGS**
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.. envvar:: ANON_LOGS
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Set to anything non-empty to replace IP addresses in logs with
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redacted text like 'xx.xx.xx.xx:xxx'. By default IP addresses will
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be written to logs.
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redacted text like ``xx.xx.xx.xx:xxx``. By default IP addresses
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will be written to logs.
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* **LOG_SESSIONS**
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.. envvar:: LOG_SESSIONS
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The number of seconds between printing session statistics to the
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log. The output is identical to the **sessions** RPC command except
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that **ANON_LOGS** is honoured. Defaults to 3600. Set to zero to
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suppress this logging.
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log. The output is identical to the :ref:`sessions` RPC command
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except that :envvar:`ANON_LOGS` is honoured. Defaults to 3600. Set
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to zero to suppress this logging.
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* **REORG_LIMIT**
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.. envvar:: REORG_LIMIT
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The maximum number of blocks to be able to handle in a chain
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reorganisation. ElectrumX retains some fairly compact undo
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information for this many blocks in levelDB. The default is a
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function of **COIN** and **NET**; for Bitcoin mainnet it is 200.
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function of :envvar:`COIN` and :attr:`NET`; for Bitcoin mainnet it
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is 200.
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* **EVENT_LOOP_POLICY**
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.. envvar:: EVENT_LOOP_POLICY
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The name of an event loop policy to replace the default asyncio
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policy, if any. At present only `uvloop` is accepted, in which case
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you must have installed the `uvloop`_ Python package.
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policy, if any. At present only ``uvloop`` is accepted, in which
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case you must have installed the `uvloop`_ Python package.
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If you are not sure what this means leave it unset.
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Resource Usage Limits
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---------------------
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=====================
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The following environment variables are all optional and help to limit
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server resource consumption and prevent simple DoS.
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@ -207,13 +213,13 @@ Address subscriptions in ElectrumX are very cheap - they consume about
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two subscription-related defaults below are low and encourage you to
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raise them.
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* **MAX_SESSIONS**
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.. envvar:: MAX_SESSIONS
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The maximum number of incoming connections. Once reached, TCP and
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SSL listening sockets are closed until the session count drops
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naturally to 95% of the limit. Defaults to 1,000.
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* **MAX_SEND**
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.. envvar:: MAX_SEND
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The maximum size of a response message to send over the wire, in
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bytes. Defaults to 1,000,000. Values smaller than 350,000 are
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@ -222,28 +228,28 @@ raise them.
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The Electrum protocol has a flaw in that address histories must be
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served all at once or not at all, an obvious avenue for abuse.
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**MAX_SEND** is a stop-gap until the protocol is improved to admit
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incremental history requests. Each history entry is approximately
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100 bytes so the default is equivalent to a history limit of around
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10,000 entries, which should be ample for most legitimate users. If
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you use a higher default bear in mind one client can request history
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for multiple addresses. Also note that the largest raw transaction
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you will be able to serve to a client is just under half of
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MAX_SEND, as each raw byte becomes 2 hexadecimal ASCII characters on
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the wire. Very few transactions on Bitcoin mainnet are over 500KB
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in size.
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:envvar:`MAX_SEND` is a stop-gap until the protocol is improved to
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admit incremental history requests. Each history entry is
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approximately 100 bytes so the default is equivalent to a history
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limit of around 10,000 entries, which should be ample for most
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legitimate users. If you use a higher default bear in mind one
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client can request history for multiple addresses. Also note that
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the largest raw transaction you will be able to serve to a client is
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just under half of :envvar:`MAX_SEND`, as each raw byte becomes 2
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hexadecimal ASCII characters on the wire. Very few transactions on
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Bitcoin mainnet are over 500KB in size.
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* **MAX_SUBS**
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.. envvar:: MAX_SUBS
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The maximum number of address subscriptions across all sessions.
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Defaults to 250,000.
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* **MAX_SESSION_SUBS**
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.. envvar:: MAX_SESSION_SUBS
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The maximum number of address subscriptions permitted to a single
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session. Defaults to 50,000.
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* **BANDWIDTH_LIMIT**
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.. envvar:: BANDWIDTH_LIMIT
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Per-session periodic bandwidth usage limit in bytes. This is a soft,
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not hard, limit. Currently the period is hard-coded to be one hour.
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@ -261,7 +267,7 @@ raise them.
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Bandwidth usage is gradually reduced over time by "refunding" a
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proportional part of the limit every now and then.
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* **SESSION_TIMEOUT**
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.. envvar:: SESSION_TIMEOUT
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An integer number of seconds defaulting to 600. Sessions with no
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activity for longer than this are disconnected. Properly
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@ -270,10 +276,10 @@ raise them.
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Peer Discovery
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--------------
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==============
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In response to the `server.peers.subscribe` RPC call, ElectrumX will
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only return peer servers that it has recently connected to and
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In response to the :func:`server.peers.subscribe` RPC call, ElectrumX
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will only return peer servers that it has recently connected to and
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verified basic functionality.
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If you are not running a Tor proxy ElectrumX will be unable to connect
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@ -287,19 +293,20 @@ ElectrumX will perform peer-discovery by default and announce itself
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to other peers. If your server is private you may wish to disable
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some of this.
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* **PEER_DISCOVERY**
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.. envvar:: PEER_DISCOVERY
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This environment variable is case-insensitive and defaults to `on`.
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This environment variable is case-insensitive and defaults to
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``on``.
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If `on`, ElectrumX will occasionally connect to and verify its
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If ``on``, ElectrumX will occasionally connect to and verify its
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network of peer servers.
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If `off`, peer discovery is disabled and a hard-coded default list
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of servers will be read in and served. If set to `self` then peer
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If ``off``, peer discovery is disabled and a hard-coded default list
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of servers will be read in and served. If set to ``self`` then peer
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discovery is disabled and the server will only return itself in the
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peers list.
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* **PEER_ANNOUNCE**
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.. envvar:: PEER_ANNOUNCE
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Set this environment variable to empty to disable announcing itself.
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If not defined, or non-empty, ElectrumX will announce itself to
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@ -310,21 +317,22 @@ some of this.
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peer discovery if it notices it is not present in the peer's
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returned list.
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* **FORCE_PROXY**
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.. envvar:: FORCE_PROXY
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By default peer discovery happens over the clear internet. Set this
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to non-empty to force peer discovery to be done via the proxy. This
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might be useful if you are running a Tor service exclusively and
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wish to keep your IP address private.
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* **TOR_PROXY_HOST**
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.. envvar:: TOR_PROXY_HOST
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The host where your Tor proxy is running. Defaults to *localhost*.
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The host where your Tor proxy is running. Defaults to
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``localhost``.
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If you are not running a Tor proxy just leave this environment
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variable undefined.
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* **TOR_PROXY_PORT**
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.. envvar:: TOR_PROXY_PORT
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The port on which the Tor proxy is running. If not set, ElectrumX
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will autodetect any proxy running on the usual ports 9050 (Tor),
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@ -332,50 +340,52 @@ some of this.
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Server Advertising
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------------------
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==================
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These environment variables affect how your server is advertised
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by peer discovery (if enabled).
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* **REPORT_HOST**
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.. envvar:: REPORT_HOST
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The clearnet host to advertise. If not set, no clearnet host is
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advertised.
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* **REPORT_TCP_PORT**
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.. envvar:: REPORT_TCP_PORT
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The clearnet TCP port to advertise if **REPORT_HOST** is set.
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Defaults to **TCP_PORT**. '0' disables publishing a TCP port.
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The clearnet TCP port to advertise if :envvar:`REPORT_HOST` is set.
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Defaults to :envvar:`TCP_PORT`. ``0`` disables publishing a TCP
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port.
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* **REPORT_SSL_PORT**
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.. envvar:: REPORT_SSL_PORT
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The clearnet SSL port to advertise if **REPORT_HOST** is set.
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Defaults to **SSL_PORT**. '0' disables publishing an SSL port.
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The clearnet SSL port to advertise if :envvar:`REPORT_HOST` is set.
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Defaults to :envvar:`SSL_PORT`. ``0`` disables publishing an SSL
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port.
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* **REPORT_HOST_TOR**
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.. envvar:: REPORT_HOST_TOR
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If you wish run a Tor service, this is the Tor host name to
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advertise and must end with `.onion`.
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advertise and must end with ``.onion``.
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* **REPORT_TCP_PORT_TOR**
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.. envvar:: REPORT_TCP_PORT_TOR
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The Tor TCP port to advertise. The default is the clearnet
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**REPORT_TCP_PORT**, unless disabled or it is '0', otherwise
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**TCP_PORT**. '0' disables publishing a Tor TCP port.
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:envvar:`REPORT_TCP_PORT`, unless disabled or it is ``0``, otherwise
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:envvar:`TCP_PORT`. ``0`` disables publishing a Tor TCP port.
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* **REPORT_SSL_PORT_TOR**
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.. envvar:: REPORT_SSL_PORT_TOR
|
||||
|
||||
The Tor SSL port to advertise. The default is the clearnet
|
||||
**REPORT_SSL_PORT**, unless disabled or it is '0', otherwise
|
||||
**SSL_PORT**. '0' disables publishing a Tor SSL port.
|
||||
:envvar:`REPORT_SSL_PORT`, unless disabled or it is ``0``, otherwise
|
||||
:envvar:`SSL_PORT`. ``0`` disables publishing a Tor SSL port.
|
||||
|
||||
**NOTE**: Certificate-Authority signed certificates don't work over
|
||||
Tor, so you should set **REPORT_SSL_PORT_TOR** to 0 if yours is not
|
||||
self-signed.
|
||||
.. note:: Certificate-Authority signed certificates don't work over
|
||||
Tor, so you should set :envvar:`REPORT_SSL_PORT_TOR` to
|
||||
``0`` if yours is not self-signed.
|
||||
|
||||
|
||||
Cache
|
||||
-----
|
||||
=====
|
||||
|
||||
If synchronizing from the Genesis block your performance might change
|
||||
by tweaking the cache size. Cache size is only checked roughly every
|
||||
@ -387,7 +397,7 @@ your available physical RAM:
|
||||
|
||||
.. _CACHE:
|
||||
|
||||
* **CACHE_MB**
|
||||
.. envvar:: CACHE_MB
|
||||
|
||||
The amount of cache, in MB, to use. The default is 1,200.
|
||||
|
||||
@ -400,9 +410,8 @@ your available physical RAM:
|
||||
fact performance begins to fall, probably because LevelDB already
|
||||
caches, and also because of Python GC.
|
||||
|
||||
I do not recommend raising this above 2000. If upgrading from prior
|
||||
versions, a value of 90% of the sum of the old UTXO_MB and HIST_MB
|
||||
variables is roughly equivalent.
|
||||
I do not recommend raising this above 2000.
|
||||
|
||||
.. _lib/coins.py: https://github.com/kyuupichan/electrumx/blob/master/lib/coins.py
|
||||
.. _lib/coins.py:
|
||||
https://github.com/kyuupichan/electrumx/blob/master/lib/coins.py
|
||||
.. _uvloop: https://pypi.python.org/pypi/uvloop
|
||||
|
||||
@ -92,7 +92,7 @@ html_theme_options = {
|
||||
# Add any paths that contain custom static files (such as style sheets) here,
|
||||
# relative to this directory. They are copied after the builtin static files,
|
||||
# so a file named "default.css" will overwrite the builtin "default.css".
|
||||
html_static_path = ['_static']
|
||||
# html_static_path = ['_static']
|
||||
|
||||
# Custom sidebar templates, must be a dictionary that maps document names
|
||||
# to template names.
|
||||
|
||||
@ -172,6 +172,8 @@ That number of blocks will be backed up - using undo information
|
||||
stored in ElectrumX's database - and then ElectrumX will move forwards
|
||||
on the daemon's main chain to its current height.
|
||||
|
||||
.. _sessions:
|
||||
|
||||
sessions
|
||||
--------
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user