'\" t
.\"     Title: lightning-listchannels
.\"    Author: [see the "AUTHOR" section]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: 01/09/2019
.\"    Manual: \ \&
.\"    Source: \ \&
.\"  Language: English
.\"
.TH "LIGHTNING\-LISTCHANN" "7" "01/09/2019" "\ \&" "\ \&"
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.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
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.\" * MAIN CONTENT STARTS HERE *
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.SH "NAME"
lightning-listchannels \- Command to query active lightning channels in the entire network\&.
.SH "SYNOPSIS"
.sp
\fBlistchannels\fR [\fIshort_channel_id\fR] [\fIsource\fR]
.SH "DESCRIPTION"
.sp
The \fBlistchannels\fR RPC command returns data on channels that are known to the node\&. Because channels may be bidirectional, up to 2 objects will be returned for each channel (one for each direction)\&.
.sp
If \fIshort_channel_id\fR is supplied, then only known channels with a matching \fIshort_channel_id\fR are returned\&.
.sp
If \fIsource\fR is supplied, then only channels leading from that node id are returned\&.
.sp
If neither is supplied, data on all lightning channels known to this node, are returned\&. These can be local channels or public channels broadcast on the gossip network\&.
.SH "RETURN VALUE"
.sp
On success, an object with a "channels" key is returned containing a list of 0 or more objects\&.
.sp
Each object in the list contains the following data:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fIsource\fR
: The node providing entry to the channel, specifying the fees charged for using the channel in that direction\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fIdestination\fR
: The node providing the exit point for the channel\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fIshort_channel_id\fR
: The channel identifier\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fIpublic\fR
: Boolean value, is publicly available\&. Non\-local channels will only ever have this value set to true\&. Local channels are side\-loaded by this node, rather than obtained through the gossip network, and so may have this value set to false\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fIsatoshis\fR
: Funds available in the channel\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fImessage_flags\fR
: Bitfield showing the presence of optional fields in the
\fIchannel_update\fR
message (BOLT #7)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fIchannel_flags\fR
: Bitfields indicating the direction of the channel and signaling various options concerning the channel\&. (BOLT #7)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fIactive\fR
: Boolean value, is available for routing\&. This is linked to the channel flags data, where if the second bit is set, signals a channels temporary unavailability (due to loss of connectivity) OR permanent unavailability where the channel has been closed but not settlement on\-chain\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fIlast_update\fR
: Unix timestamp (seconds) showing when the last channel_update message was received\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fIbase_fee_millisatoshi\fR
: The base fee (in millisatoshi) charged for the HTLC (BOLT #2)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fIfee_per_millionth\fR
: The amount (in millionths of a satoshi) charged per transferred satoshi (BOLT #2)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fIdelay\fR
: The number of blocks delay required to wait for on\-chain settlement when unilaterally closing the channel (BOLT #2)\&.
.RE
.sp
If \fIshort_channel_id\fR or \fIsource\fR is supplied and no matching channels are found, a "channels" object with an empty list is returned\&.
.SH "ERRORS"
.sp
If \fIshort_channel_id\fR is not a valid short_channel_id, an error message will be returned:
.sp
.if n \{\
.RS 4
.\}
.nf
{ "code" : \-32602,
  "message" : "\*(Aqshort_channel_id\*(Aq should be a short channel id, not \*(Aq\&.\&.\&.\*(Aq" }
.fi
.if n \{\
.RE
.\}
.sp
Similarly if \fIsource\fR is not a valid pubkey\&.
.SH "AUTHOR"
.sp
Michael Hawkins <michael\&.hawkins@protonmail\&.com>\&.
.SH "SEE ALSO"
.sp
lightning\-fundchannel(7), lightning\-listnodes(7)
.SH "RESOURCES"
.sp
Main web site: https://github\&.com/ElementsProject/lightning
.sp
Lightning RFC site
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
BOLT #2:
https://github\&.com/lightningnetwork/lightning\-rfc/blob/master/02\-peer\-protocol\&.md
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
BOLT #7:
https://github\&.com/lightningnetwork/lightning\-rfc/blob/master/07\-routing\-gossip\&.md
.RE