38 lines
1.9 KiB
Markdown
38 lines
1.9 KiB
Markdown
# `bitcoin.conf` Configuration File
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The configuration file is used by `bitcoind`, `bitcoin-qt` and `bitcoin-cli`.
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All command-line options (except for `-?`, `-help`, `-version` and `-conf`) may be specified in a configuration file, and all configuration file options (except for `includeconf`) may also be specified on the command line. Command-line options override values set in the configuration file and configuration file options override values set in the GUI.
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## Configuration File Format
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The configuration file is a plain text file and consists of `option=value` entries, one per line. Leading and trailing whitespaces are removed.
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In contrast to the command-line usage:
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- an option must be specified without leading `-`;
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- a value of the given option is mandatory; e.g., `testnet=1` (for chain selection options), `noconnect=1` (for negated options).
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### Blank lines
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Blank lines are allowed and ignored by the parser.
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### Comments
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A comment starts with a number sign (`#`) and extends to the end of the line. All comments are ignored by the parser.
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Comments may appear in two ways:
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- on their own on an otherwise empty line (_preferable_);
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- after an `option=value` entry.
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### Network specific options
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Network specific options can be:
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- placed into sections with headers `[main]` (not `[mainnet]`), `[test]` (not `[testnet]`) or `[regtest]`;
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- prefixed with a chain name; e.g., `regtest.maxmempool=100`.
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## Configuration File Path
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The configuration file is not automatically created; you can create it using your favorite text editor. By default, the configuration file name is `bitcoin.conf` and it is located in the Bitcoin data directory, but both the Bitcoin data directory and the configuration file path may be changed using the `-datadir` and `-conf` command-line options.
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The `includeconf=<file>` option in the `bitcoin.conf` file can be used to include additional configuration files.
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