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Explicitly add a way for the splice receiving node to reject a splice #3

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@ddustin ddustin commented Apr 30, 2022

they don't like. For instance if a node has a policy of only accepting channels of a certain size and then their peer tries to lower it with splice.

rustyrussell and others added 11 commits May 9, 2021 14:47
Signed-off-by: Rusty Russell <[email protected]>
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 <[email protected]>
… channel.

The initiator (in the case of simultaneity, the higher feepayer) pays
for the input and output, and sets the feerate.

We freeze the channel while this construction is going on: it should
be quick.

Signed-off-by: Rusty Russell <[email protected]>


Header from folded patch 'fixup3.patch':

fixup! splicing: use the generic negotiation mechanism to splice in/out of a channel.

- Remove 1 per minute restriction: 25% growth limits us a lot (@niftynei)
- Nomenclature: initiator, splice transaction, channel funding output.
- Weaken reserve check to only cover iff they extract funds.
This is much simpler.

Signed-off-by: Rusty Russell <[email protected]>
Signed-off-by: Rusty Russell <[email protected]>


Header from folded patch 'fixup2.patch':

fixup! splice_locked: terminate this splice once one reaches agreed depths.

Use 6; we need to start announcing then anyway, so keep it simple.
This was Matt Corallo's idea; a simple flag means you should keep
using the channel as it's being replaced.

Signed-off-by: Rusty Russell <[email protected]>
Signed-off-by: Rusty Russell <[email protected]>


Header from folded patch 'fixup.patch':

fixup! gossip: make sure to send new announcement_signatures post-splice.

It's called `splice_locked` and it's always sent 6 blocks.
…etting fees.

Any changes must be valid for all possible commitment transactions.  A minor
change, but for implementations which quote the spec and check those quotes
this will highlight the changes needed.

Signed-off-by: Rusty Russell <[email protected]>
@ddustin ddustin force-pushed the guilt/splice branch 2 times, most recently from 92d647b to 03c47c1 Compare February 13, 2024 20:12
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2 participants