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lightning-fundchannel.7
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.TH "LIGHTNING-FUNDCHANNEL" "7" "" "" "lightning-fundchannel"
.SH NAME
lightning-fundchannel - Command for establishing a lightning channel
.SH SYNOPSIS
\fBfundchannel\fR \fIid\fR \fIamount\fR [\fIfeerate\fR \fIannounce\fR] [\fIminconf\fR]
[\fIutxos\fR]
.SH DESCRIPTION
The \fBfundchannel\fR RPC command opens a payment channel with a peer by
committing a funding transaction to the blockchain as defined in BOLT
#2\. \fBfundchannel\fR by itself does not attempt to open a connection\. A
connection must first be established using \fBconnect\fR\. Once the
transaction is confirmed, normal channel operations may begin\. Readiness
is indicated by \fBlistpeers\fR reporting a \fIstate\fR of CHANNELD_NORMAL
for the channel\.
\fIid\fR is the peer id obtained from \fBconnect\fR\.
\fIamount\fR is the amount in satoshis taken from the internal wallet to
fund the channel\. The string \fIall\fR can be used to specify all available
funds (or 16777215 satoshi if more is available)\. Otherwise, it is in
satoshi precision; it can be a whole number, a whole number ending in
\fIsat\fR, a whole number ending in \fI000msat\fR, or a number with 1 to 8
decimal places ending in \fIbtc\fR\. The value cannot be less than the dust
limit, currently set to 546, nor more than 16777215 satoshi\.
\fIfeerate\fR is an optional feerate used for the opening transaction and as
initial feerate for commitment and HTLC transactions\. It can be one of
the strings \fIurgent\fR (aim for next block), \fInormal\fR (next 4 blocks or
so) or \fIslow\fR (next 100 blocks or so) to use lightningd’s internal
estimates: \fInormal\fR is the default\.
\fIannounce\fR is an optional flag that triggers whether to announce this
channel or not\. Defaults to \fBtrue\fR\. An unannounced channel is considered
private\.
Otherwise, \fIfeerate\fR is a number, with an optional suffix: \fIperkw\fR means
the number is interpreted as satoshi-per-kilosipa (weight), and \fIperkb\fR
means it is interpreted bitcoind-style as satoshi-per-kilobyte\. Omitting
the suffix is equivalent to \fIperkb\fR\.
\fIminconf\fR specifies the minimum number of confirmations that used
outputs should have\. Default is 1\.
\fIutxos\fR specifies the utxos to be used to fund the channel, as an array
of "txid:vout"\.
.SH RETURN VALUE
On success, the \fItx\fR and \fItxid\fR of the transaction is returned, as well
as the \fIchannel_id\fR of the newly created channel\. On failure, an error
is reported and the channel is not funded\.
The following error codes may occur:
.IP \[bu]
-1: Catchall nonspecific error\.
.IP \[bu]
300: The maximum allowed funding amount is exceeded\.
.IP \[bu]
301: There are not enough funds in the internal wallet (including fees) to create the transaction\.
.IP \[bu]
302: The output amount is too small, and would be considered dust\.
.IP \[bu]
303: Broadcasting of the funding transaction failed, the internal call to bitcoin-cli returned with an error\.
Failure may also occur if \fBlightningd\fR and the peer cannot agree on
channel parameters (funding limits, channel reserves, fees, etc\.)\.
.SH SEE ALSO
\fBlightning-connect\fR(7), lightning-listfunds(), \fBlightning-listpeers\fR(7)
.SH RESOURCES
Main web site: \fIhttps://github.com/ElementsProject/lightning\fR