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lightning-openchannel_update - Command to update a collab channel open

openchannel_update channel_id psbt

openchannel_update is a low level RPC command which continues an open channel, as specified by channel_id. An updated psbt is passed in; any changes from the PSBT last returned (either from openchannel_init or a previous call to openchannel_update) will be communicated to the peer.

Must be called after openchannel_init and before openchannel_signed.

Must be called until commitments_secured is returned as true, at which point openchannel_signed should be called with a signed version of the PSBT returned by the last call to openchannel_update.

channel_id is the id of the channel.

psbt is the updated PSBT to be sent to the peer. May be identical to the PSBT last returned by either openchannel_init or openchannel_update.

On success, an object is returned, containing:

channel_id (hex): the channel id of the channel (always 64 characters)
psbt (string): the PSBT of the funding transaction
commitments_secured (boolean): whether the psbt is complete (if true, sign psbt and call openchannel_signed to complete the channel open)
funding_outnum (u32): The index of the funding output in the psbt
close_to (hex, optional): scriptPubkey which we have to close to if we mutual close

If commitments_secured is true, will also return:

The derived channel_id.
A close_to script, iff a close_to address was provided to openchannel_init and the peer supports option_upfront_shutdownscript.
The funding_outnum, the index of the funding output for this channel in the funding transaction.

-32602: If the given parameters are wrong.
-1: Catchall nonspecific error.
305: Peer is not connected.
309: PSBT missing required fields
311: Unknown channel id.
312: Channel in an invalid state

lightning-openchannel_init(7), lightning-openchannel_signed(7), lightning-openchannel_bump(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)

@niftynei <> is mainly responsible.

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