LIGHTNING-OPENCHANNEL_BUMP(7)

NAME

lightning-openchannel_bump -- Command to initiate a channel RBF

SYNOPSIS

openchannel_bump channel_id amount initalpsbt [funding_feerate]

DESCRIPTION

openchannel_bump is a RPC command which initiates a channel RBF (Replace-By-Fee) for the specified channel. It uses the openchannel protocol which allows for interactive transaction construction.

id is the id of the channel to RBF.

amount is the satoshi value that we will contribute to the channel. This value will be added to the provided PSBT in the output which is encumbered by the 2-of-2 script for this channel.

initialpsbt is the funded, incomplete PSBT that specifies the UTXOs and change output for our channel contribution. It can be updated, see openchannel_update; initialpsbt must have at least one input. Must have the Non-Witness UTXO (PSBT_IN_NON_WITNESS_UTXO) set for every input. An error (code 309) will be returned if this requirement is not met.

funding_feerate is an optional field. Sets the feerate for the funding transaction. Defaults to 1/64th greater than the last feerate used for this channel.

Warning: bumping a leased channel will lose the lease.

RETURN VALUE

On success, an object is returned, containing:

•   channel_id (hex): the channel id of the channel (always 64 characters)

•   channel_type (object): channel_type as negotiated with peer (added v24.02):

    •   bits (array of u32s): Each bit set in this channel_type (added v24.02):

    •   Bit number

    •   names (array of strings): Feature name for each bit set in this channel_type (added v24.02):

    •   Name of feature bit (one of "static_remotekey/even", "anchor_outputs/even", "anchors_zero_fee_htlc_tx/even", "scid_alias/even", "zeroconf/even")

•   psbt (string): the (incomplete) PSBT of the RBF transaction

•   commitments_secured (boolean): whether the psbt is complete (always false)

•   funding_serial (u64): the serial_id of the funding output in the psbt

•   requires_confirmed_inputs (boolean, optional): Does peer require confirmed inputs in psbt?

If the peer does not support option_dual_fund, this command will return an error.

If the channel is not in a state that is eligible for RBF, this command will return an error.

On error the returned object will contain code and message properties, with code being one of the following:

•   -32602: If the given parameters are wrong.

•   -1: Catchall nonspecific error.

•   300: The amount exceeded the maximum configured funding amount.

•   301: The provided PSBT cannot afford the funding amount.

•   305: Peer is not connected.

•   309: PSBT missing required fields

•   311: Unknown channel id.

•   312: Channel in an invalid state

SEE ALSO

lightning-openchannel_init(7), lightning-openchannel_update(7), lightning-openchannel_signed(7), lightning-openchannel_abort(7), lightning-fundchannel_start(7), lightning-fundchannel_complete(7), lightning-fundchannel(7), lightning-fundpsbt(7), lightning-utxopsbt(7), lightning-multifundchannel(7)

AUTHOR

@niftynei <niftynei@gmail.com> is mainly responsible.

RESOURCES

Main web site: https://github.com/ElementsProject/lightning