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openingd: Add method to set absolute reserve

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This commit is contained in:
Christian Decker 2022-06-08 10:36:30 +02:00
parent fcd2320de7
commit 7159a25e73
1 changed files with 18 additions and 7 deletions
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25
openingd/openingd.c
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@ -138,12 +138,10 @@ static void NORETURN negotiation_failed(struct state *state,
negotiation_aborted(state, errmsg);
}
/* We always set channel_reserve_satoshis to 1%, rounded down. */
static void set_reserve(struct state *state, const struct amount_sat dust_limit)
static void set_reserve_absolute(struct state * state, const struct amount_sat dust_limit, struct amount_sat reserve_sat)
{
state->localconf.channel_reserve
= amount_sat_div(state->funding_sats, 100);
status_debug("Setting their reserve to %s",
type_to_string(tmpctx, struct amount_sat, &reserve_sat));
/* BOLT #2:
*
* The sending node:
@ -151,10 +149,23 @@ static void set_reserve(struct state *state, const struct amount_sat dust_limit)
* - MUST set `channel_reserve_satoshis` greater than or equal to
* `dust_limit_satoshis` from the `open_channel` message.
*/
if (amount_sat_greater(dust_limit,
state->localconf.channel_reserve))
if (amount_sat_greater(dust_limit, reserve_sat)) {
status_debug(
"Their reserve is too small, bumping to dust_limit: %s < %s",
type_to_string(tmpctx, struct amount_sat, &reserve_sat),
type_to_string(tmpctx, struct amount_sat, &dust_limit));
state->localconf.channel_reserve
= dust_limit;
} else {
state->localconf.channel_reserve = reserve_sat;
}
}
/* We always set channel_reserve_satoshis to 1%, rounded down. */
static void set_reserve(struct state *state, const struct amount_sat dust_limit)
{
set_reserve_absolute(state, dust_limit,
amount_sat_div(state->funding_sats, 100));
}
/*~ Handle random messages we might get during opening negotiation, (eg. gossip)