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dualopend: use a lower feerate for first commitment tx for anchors.

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We need to know both, because in theory we could negotiate a
non-anchor channel even if they support it.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2023-06-26 08:42:21 +09:30
parent 96e198f751
commit 6087decec3
4 changed files with 14 additions and 2 deletions
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3
doc/lightning-openchannel_init.7.md
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@ -27,7 +27,8 @@ every input. An error (code 309) will be returned if this requirement
is not met.
*commitment\_feerate* is an optional field. Sets the feerate for
commitment transactions: see **fundchannel**.
commitment transactions for non-anchor channels: see **fundchannel**.
For anchor channels, it is ignored.
*funding\_feerate* is an optional field. Sets the feerate for the
funding transaction. Defaults to 'opening' feerate.

2
lightningd/dual_open_control.c
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@ -2936,6 +2936,7 @@ static struct command_result *json_openchannel_init(struct command *cmd,
oa->our_upfront_shutdown_script,
our_upfront_shutdown_script_wallet_index,
*feerate_per_kw,
unilateral_feerate(cmd->ld->topology, true),
*feerate_per_kw_funding,
channel->channel_flags,
amount_sat_zero(*request_amt) ?
@ -3478,6 +3479,7 @@ static struct command_result *json_queryrates(struct command *cmd,
oa->our_upfront_shutdown_script,
our_upfront_shutdown_script_wallet_index,
*feerate_per_kw,
unilateral_feerate(cmd->ld->topology, true),
*feerate_per_kw_funding,
channel->channel_flags,
amount_sat_zero(*request_amt) ?

10
openingd/dualopend.c
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@ -2929,13 +2929,15 @@ static void opener_start(struct state *state, u8 *msg)
struct tx_state *tx_state = state->tx_state;
struct amount_sat *requested_lease;
size_t locktime;
u32 nonanchor_feerate, anchor_feerate;
if (!fromwire_dualopend_opener_init(state, msg,
&tx_state->psbt,
&tx_state->opener_funding,
&state->upfront_shutdown_script[LOCAL],
&state->local_upfront_shutdown_wallet_index,
&state->feerate_per_kw_commitment,
&nonanchor_feerate,
&anchor_feerate,
&tx_state->feerate_per_kw_funding,
&state->channel_flags,
&requested_lease,
@ -2962,6 +2964,12 @@ static void opener_start(struct state *state, u8 *msg)
state->their_features);
open_tlv->channel_type = state->channel_type->features;
/* Given channel type, which feerate do we use? */
if (channel_type_has_anchors(state->channel_type))
state->feerate_per_kw_commitment = anchor_feerate;
else
state->feerate_per_kw_commitment = nonanchor_feerate;
if (requested_lease)
state->requested_lease = tal_steal(state, requested_lease);

1
openingd/dualopend_wire.csv
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@ -188,6 +188,7 @@ msgdata,dualopend_opener_init,local_shutdown_len,u16,
msgdata,dualopend_opener_init,local_shutdown_scriptpubkey,u8,local_shutdown_len
msgdata,dualopend_opener_init,local_shutdown_wallet_index,?u32,
msgdata,dualopend_opener_init,feerate_per_kw,u32,
msgdata,dualopend_opener_init,anchor_feerate_per_kw,u32,
msgdata,dualopend_opener_init,feerate_per_kw_funding,u32,
msgdata,dualopend_opener_init,channel_flags,u8,
msgdata,dualopend_opener_init,requested_sats,?amount_sat,

Can't render this file because it has a wrong number of fields in line 16.