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BOLT #2: Set an initiator in quiescence.
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This is especially useful for protocols such as splicing; for
simplified commitment transactions, there is already an implied
initiator at each point, so having the negotiation at splicing
time would be redundant.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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rustyrussell committed May 24, 2021
1 parent 439c635 commit b96218b
Showing 1 changed file with 13 additions and 2 deletions.
15 changes: 13 additions & 2 deletions 02-peer-protocol.md
Original file line number Diff line number Diff line change
Expand Up @@ -458,13 +458,18 @@ channel by indicating that "SomeThing Fundamental is Underway".
1. type: 2 (`stfu`)
2. data:
* [`channel_id`:`channel_id`]
* [`u8`:`initiator`]

### Requirements

The sender of `stfu`:
- MUST NOT send `stfu` if any of the sender's htlc additions, htlc removals
or fee updates are pending for either peer.
- MUST NOT send `stfu` twice.
- if it is replying to an `stfu`:
- MUST set `initiator` to 0
- otherwise:
- MUST set `initiator` to 1
- MUST set `channel_id` to the id of the channel to quiesce.
- MUST now consider the channel to be quiescing.
- MUST NOT send an update message after `stfu`.
Expand All @@ -483,8 +488,14 @@ Upon disconnection:

The normal use would be to cease sending updates, then wait for all
the current updates to be acknowledged by both peers, then start
quiescence. If both sides send `stfu` simultaneously, the result is
exactly the same as if one had replied to the other.
quiescence. For some protocols, choosing the initiator matters,
so this flag is sent.

If both sides send `stfu` simultaneously, they will both set
`initiator` to `1`, in which case the "initiator" is arbitrarily
considered to be the channel funder (the sender of `open_channel`).
The quiescence effect is exactly the same as if one had replied to the
other.

## Channel Close

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