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closingd: use the final commitment tx fee as the maximum.

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We shouldn't fail negotiation just because they exceeded what we thought
fair: we're better off as long as it's actually <= final commitment fee.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2018-02-02 11:16:18 +10:30
committed by Christian Decker
parent 4ed13401ce
commit 5deebb85c3
3 changed files with 4 additions and 8 deletions
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8
lightningd/peer_control.c
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@@ -1888,7 +1888,7 @@ static void peer_start_closingd(struct peer *peer,
{
const tal_t *tmpctx = tal_tmpctx(peer);
u8 *initmsg, *local_scriptpubkey;
u64 minfee, maxfee, startfee, feelimit;
u64 minfee, startfee, feelimit;
u64 num_revocations;
u64 funding_msatoshi, our_msatoshi, their_msatoshi;
@@ -1936,15 +1936,11 @@ static void peer_start_closingd(struct peer *peer,
feelimit = commit_tx_base_fee(peer->channel_info->feerate_per_kw[LOCAL],
0);
maxfee = commit_tx_base_fee(get_feerate(peer->ld->topology,
FEERATE_IMMEDIATE), 0);
minfee = commit_tx_base_fee(get_feerate(peer->ld->topology,
FEERATE_SLOW), 0);
startfee = commit_tx_base_fee(get_feerate(peer->ld->topology,
FEERATE_NORMAL), 0);
if (maxfee > feelimit)
maxfee = feelimit;
if (startfee > feelimit)
startfee = feelimit;
if (minfee > feelimit)
@@ -1974,7 +1970,7 @@ static void peer_start_closingd(struct peer *peer,
our_msatoshi / 1000, /* Rounds down */
their_msatoshi / 1000, /* Rounds down */
peer->our_config.dust_limit_satoshis,
minfee, maxfee, startfee,
minfee, feelimit, startfee,
local_scriptpubkey,
peer->remote_shutdown_scriptpubkey,
reconnected,