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

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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