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splice: Update funding pubkey on splice lock

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Set the remote funding pubkey on both lightningd and channeld when mutual splice lock is achieved.

This will be needed once rotating funding keys is enabled during splicing

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This commit is contained in:
Dusty Daemon 2024-10-04 16:40:31 -04:00 • committed by Rusty Russell
parent 5f330b3cd6
commit 03d7d8f45a
2 changed files with 6 additions and 0 deletions
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2
channeld/channeld.c
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@ -491,6 +491,8 @@ static void check_mutual_splice_locked(struct peer *peer)
"Splice lock unable to update funding. %s",
error);
peer->channel->funding_pubkey[REMOTE] = inflight->remote_funding;
status_debug("mutual splice_locked, channel updated to: %s",
fmt_channel(tmpctx, peer->channel));

4
lightningd/peer_control.c
View file

@ -2058,6 +2058,10 @@ void update_channel_from_inflight(struct lightningd *ld,
bitcoin_tx_with_psbt(channel, psbt_copy),
&inflight->last_sig);
/* If the remote side rotated their pubkey during splice, update now */
if (inflight->funding->splice_remote_funding)
channel->channel_info.remote_fundingkey = *inflight->funding->splice_remote_funding;
/* Update the reserve */
channel_update_reserve(channel,
&channel->channel_info.their_config,