4628e3ace8
Update the lightningd <-> channeld interface with lots of new commands to needed to facilitate spicing. Implement the channeld splicing protocol leveraging the interactivetx protocol. Implement lightningd’s channel_control to support channeld in its splicing efforts. Changelog-Added: Added the features to enable splicing & resizing of active channels.
2.4 KiB
lightning-splice_init -- Command to initiate a channel to a peer
SYNOPSIS
(WARNING: experimental-splicing only)
splice_init channel_id relative_amount [initalpsbt] [feerate_per_kw] [force_feerate]
DESCRIPTION
splice_init is a low level RPC command which initiates a channel splice for a
given channel specified by channel_id.
channel_id is the channel id of the channel to be spliced.
relative_amount is a positive or negative amount of satoshis to add or subtract from the channel.
initalpsbt is the (optional) base 64 encoded PSBT to begin with. If not specified, one will be generated automatically.
feerate_per_kw is the miner fee we promise our peer to pay for our side of
the splice transaction. It is calculated by feerate_per_kw *
our_bytes_in_splice_tx / 1000.
force_feerate is a boolean flag. By default splices will fail if the fee
provided looks too high. This is to protect against accidentally setting your
fee higher than intended. Set force_feerate to true to skip this saftey check.
Here is an example set of splice commands that will splice in 100,000 sats to
the first channel that comes out of listpeerchannels. The example assumes
you already have at least one confirmed channel.
RESULT=$(lightning-cli listpeerchannels)
CHANNEL_ID=$(echo $RESULT| jq -r ".channels[0].channel_id")
echo $RESULT
RESULT=$(lightning-cli fundpsbt -k satoshi=100000sat feerate=urgent startweight=800 excess_as_change=true)
INITIALPSBT=$(echo $RESULT | jq -r ".psbt")
echo $RESULT
RESULT=$(lightning-cli splice_init $CHANNEL_ID 100000 $INITIALPSBT)
PSBT=$(echo $RESULT | jq -r ".psbt")
echo $RESULT
RESULT=$(lightning-cli splice_update $CHANNEL_ID $PSBT)
PSBT=$(echo $RESULT | jq -r ".psbt")
echo $RESULT
RESULT=$(lightning-cli signpsbt $PSBT)
PSBT=$(echo $RESULT | jq -r ".signed_psbt")
echo $RESULT
lightning-cli splice_signed $CHANNEL_ID $PSBT
RETURN VALUE
On success, an object is returned, containing:
- psbt (string): the (incomplete) PSBT of the splice transaction
SEE ALSO
AUTHOR
@dusty_daemon
RESOURCES
Main web site: https://github.com/ElementsProject/lightning