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dual-funding: update fee_step to be a feerate

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Using a 'feestep' is more restrictive than you'd want, instead we
enforce that the next feerate must be at least 1/64th more than the
last, but put no upper limit on it

Includes update to lnprototest changes

Contributed-By: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>
Changelog-EXPERIMENTAL: Protocol: Replaces init_rbf's `fee_step` for RBF of v2 opens with `funding_feerate_perkw`, breaking change
This commit is contained in:
niftynei
2021-07-09 14:13:20 -05:00
committed by neil saitug
parent 04b6ad06cb
commit 376e6f8bd1
20 changed files with 181 additions and 174 deletions
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28
lightningd/peer_control.c
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@@ -774,32 +774,32 @@ static void json_add_channel(struct lightningd *ld,
if (!list_empty(&channel->inflights)) {
struct channel_inflight *initial, *inflight;
u32 last_feerate, next_feerate, feerate;
u8 feestep;
last_feerate = channel_last_funding_feerate(channel);
assert(last_feerate > 0);
next_feerate = last_feerate + last_feerate / 4;
u32 last_feerate, next_feerate;
initial = list_top(&channel->inflights,
struct channel_inflight, list);
feerate = initial->funding->feerate;
json_add_string(response, "initial_feerate",
tal_fmt(tmpctx, "%d%s", feerate,
tal_fmt(tmpctx, "%d%s",
initial->funding->feerate,
feerate_style_name(FEERATE_PER_KSIPA)));
last_feerate = channel_last_funding_feerate(channel);
assert(last_feerate > 0);
json_add_string(response, "last_feerate",
tal_fmt(tmpctx, "%d%s", last_feerate,
feerate_style_name(FEERATE_PER_KSIPA)));
/* BOLT-9e7723387c8859b511e178485605a0b9133b9869 #2:
* - MUST set `funding_feerate_perkw` greater than or equal to
* 65/64 times the last sent `funding_feerate_perkw`
* rounded down.
*/
next_feerate = last_feerate * 65 / 64;
assert(next_feerate > last_feerate);
json_add_string(response, "next_feerate",
tal_fmt(tmpctx, "%d%s", next_feerate,
feerate_style_name(FEERATE_PER_KSIPA)));
/* Now we derive the feestep */
for (feestep = 0; feerate < next_feerate; feestep++)
feerate += feerate / 4;
json_add_num(response, "next_fee_step", feestep);
/* List the inflights */
json_array_start(response, "inflight");
list_for_each(&channel->inflights, inflight, list) {