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258 lines
6.6 KiB
258 lines
6.6 KiB
.TH "LIGHTNINGD" "8" "" "" "lightningd"
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.SH NAME
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lightningd - Daemon for running a Lightning Network node
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.SH SYNOPSIS
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.nf
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.RS
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lightningd [--conf=<config-file>] [OPTIONS]…
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.RE
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.fi
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.SH DESCRIPTION
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\fBlightningd\fR starts the C-Lightning daemon, which implements a
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standards-compliant Lightning Network node\.
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.SH CONFIGURATION OPTIONS
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\fB--conf\fR=\fIFILE\fR
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Specify configuration file\. If not an absolute path, will be relative
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from the lightning-dir location\. Defaults to \fIconfig\fR\.
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\fB--lightning-dir\fR=\fIDIR\fR
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Set the directory for the C-Lightning daemon\. Defaults to
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\fI$HOME/\.lightning\fR\.
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.SH MORE OPTIONS
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Command line options are mirrored as configuration options in the
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configuration file, so \fIfoo\fR in the configuration file simply becomes
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\fB--foo\fR on the command line, and \fBfoo=bar\fR becomes \fB--foo=bar\fR\.
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See \fBlightningd-config\fR(5) for a comprehensive list of all available
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options\.
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.SH LOGGING AND COMMANDING C-LIGHTNING
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By default, C-Lightning will log to the standard output\.
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To log to a specific file, use \fB--log-file\fR=\fIPATH\fR\.
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Sending SIGHUP will cause C-Lightning to reopen this file,
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for example to do log rotation\.
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C-Lightning will set up a Unix domain socket for receiving
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commands\.
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By default this will be the file \fBlightning-rpc\fR in your
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specified \fBlightning-dir\fR\.
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You can use \fBlightning-cli\fR(1) to send commands to C-Lightning
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once \fBlightningd\fR has started; you need to match the
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\fB--lightning-dir\fR and \fB--rpc-file\fR options between them\.
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Commands for C-Lightning are described in various manpages
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in section 7, with the common prefix \fBlightning-\fR\.
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.SH QUICK START
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First, decide on and create a directory for \fIlightning-dir\fR, or just use
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the default \fI$HOME/\.lightning\fR\. Then create a \fIconfig\fR file in this
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directory containing your configuration\.
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Your other main preparation would be to set up a mainnet Bitcoin
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fullnode, i\.e\. run a \fBbitcoind\fR(1) instance\. The rest of this quick start
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guide will assume you are reckless and want to spend real funds on
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Lightning\. Indicate \fInetwork=bitcoin\fR in your \fIconfig\fR file explicitly\.
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C-Lightning needs to communicate with the Bitcoin Core RPC\. You can set
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this up using \fIbitcoin-datadir\fR, \fIbitcoin-rpcconnect\fR,
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\fIbitcoin-rpcport\fR, \fIbitcoin-rpcuser\fR, and \fIbitcoin-rpcpassword\fR options
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in your \fIconfig\fR file\.
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Finally, just to keep yourself sane, decide on a log file name and
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indicate it using \fIlog-file=lightningd\.log\fR in your \fIconfig\fR file\. You
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might be interested in viewing it periodically as you follow along on
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this guide\.
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Once the \fBbitcoind\fR instance is running, start \fBlightningd\fR(8):
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.nf
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.RS
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$ lightningd --lightning-dir=$HOME/.lightning --daemon
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.RE
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.fi
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This starts \fBlightningd\fR in the background due to the \fI--daemon\fR
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option\.
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Check if things are working:
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.nf
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.RS
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$ lightning-cli --lightning-dir=%HOME/.lightning help
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$ lightning-cli --lightning-dir=%HOME/.lightning getinfo
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.RE
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.fi
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The \fBgetinfo\fR command in particular will return a \fIblockheight\fR field,
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which indicates the block height to which \fBlightningd\fR has been
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synchronized to (this is separate from the block height that your
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\fBbitcoind\fR has been synchronized to, and will always lag behind
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\fBbitcoind\fR)\. You will have to wait until the \fIblockheight\fR has reached
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the actual blockheight of the Bitcoin network\.
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Before you can get funds offchain, you need to have some funds onchain
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owned by \fBlightningd\fR (which has a separate wallet from the
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\fBbitcoind\fR it connects to)\. Get an address for \fBlightningd\fR via
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\fBlightning-newaddr\fR(7) command as below (\fI--lightning-dir\fR option has been
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elided, specify it if you selected your own \fIlightning-dir\fR):
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.nf
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.RS
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$ lightning-cli newaddr
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.RE
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.fi
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This will provide a native SegWit bech32 address\. In case all your money
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is in services that do not support native SegWit and have to use
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P2SH-wrapped addresses, instead use:
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.nf
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.RS
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$ lightning-cli newaddr p2sh-segwit
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.RE
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.fi
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Transfer a small amount of onchain funds to the given address\. Check the
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status of all your funds (onchain and on-Lightning) via
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\fBlightning-listfunds\fR(7):
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.nf
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.RS
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$ lightning-cli listfunds
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.RE
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.fi
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Now you need to look for an arbitrary Lightning node to connect to,
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which you can do by using \fBdig\fR(1) and querying \fIlseed\.bitcoinstats\.com\fR:
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.nf
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.RS
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$ dig lseed.bitcoinstats.com A
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.RE
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.fi
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This will give 25 IPv4 addresses, you can select any one of those\. You
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will also need to learn the corresponding public key, which you can
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determine by searching the IP addrss on \fIhttps://1ml.com/\fR \. The public
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key is a long hex string, like so:
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\fI024772ee4fa461febcef09d5869e1238f932861f57be7a6633048514e3f56644a1\fR\.
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(this example public key is not used as of this writing)
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After determining a public key, use \fBlightning-connect\fR(7) to connect to
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that public key at that IP:
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.nf
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.RS
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$ lightning-cli connect $PUBLICKEY $IP
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.RE
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.fi
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Then open a channel to that node using \fBlightning-fundchannel\fR(7):
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.nf
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.RS
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$ lightning-cli fundchannel $PUBLICKEY $SATOSHI
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.RE
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.fi
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This will require that the funding transaction be confirmed before you
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can send funds over Lightning\. To track this, use \fBlightning-listpeers\fR(7)
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and look at the \fIstate\fR of the channel:
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.nf
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.RS
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$ lightning-cli listpeers $PUBLICKEY
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.RE
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.fi
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The channel will initially start with a \fIstate\fR of
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\fICHANNELD_AWAITING_LOCKIN\fR\. You need to wait for the channel \fIstate\fR
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to become \fICHANNELD_NORMAL\fR, meaning the funding transaction has been
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confirmed deeply\.
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Once the channel \fIstate\fR is \fICHANNELD_NORMAL\fR, you can start paying
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merchants over Lightning\. Acquire a Lightning invoice from your favorite
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merchant, and use \fBlightning-pay\fR(7) to pay it:
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.nf
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.RS
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$ lightning-cli pay $INVOICE
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.RE
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.fi
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.SH BUGS
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You should report bugs on our github issues page, and maybe submit a fix
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to gain our eternal gratitude!
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.SH AUTHOR
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ZmnSCPxj \fI<ZmnSCPxj@protonmail.com\fR> wrote the initial version of
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this man page, but many others did the hard work of actually
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implementing a standards-compliant Lightning Network node
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implementation\.
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.SH SEE ALSO
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\fBlightning-listconfigs\fR(7), \fBlightning-config\fR(5), \fBlightning-cli\fR(1),
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\fBlightning-newaddr\fR(7), \fBlightning-listfunds\fR(7), \fBlightning-connect\fR(7),
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\fBlightning-fundchannel\fR(7), \fBlightning-listpeers\fR(7), \fBlightning-pay\fR(7)
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.SH RESOURCES
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Main web site: \fIhttps://github.com/ElementsProject/lightning\fR
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.SH COPYING
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Note: the modules in the ccan/ directory have their own licenses, but
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the rest of the code is covered by the BSD-style MIT license\.
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