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lightningd/build_utxos: don't lockin the UTXO reservation until confirmed.

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Unless the transaction is confirmed, the UTXOs should be released if
something happens to the peer.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2017-02-24 16:22:56 +10:30
parent be7c7b9732
commit b8472b65ba
2 changed files with 17 additions and 4 deletions
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19
lightningd/build_utxos.c
View File

@ -188,6 +188,19 @@ static void unreserve_utxo(struct lightningd *ld, const struct utxo *unres)
abort();
}
static void destroy_utxos(struct utxo *utxos, struct lightningd *ld)
{
size_t i;
for (i = 0; i < tal_count(utxos); i++)
unreserve_utxo(ld, &utxos[i]);
}
void confirm_utxos(struct lightningd *ld, struct utxo *utxos)
{
tal_del_destructor2(utxos, destroy_utxos, ld);
}
struct utxo *build_utxos(const tal_t *ctx,
struct lightningd *ld, u64 satoshi_out,
u32 feerate_per_kw, u64 dust_limit,
@ -199,6 +212,8 @@ struct utxo *build_utxos(const tal_t *ctx,
/* We assume two outputs for the weight. */
u64 satoshi_in = 0, weight = (4 + (8 + 22) * 2 + 4) * 4;
tal_add_destructor2(utxos, destroy_utxos, ld);
list_for_each(&ld->utxos, utxo, list) {
u64 fee;
@ -230,9 +245,5 @@ struct utxo *build_utxos(const tal_t *ctx,
i++;
}
/* Failed, unmark them all. */
for (i = 0; i < tal_count(utxos); i++)
unreserve_utxo(ld, &utxos[i]);
return tal_free(utxos);
}

2
lightningd/build_utxos.h
View File

@ -11,4 +11,6 @@ struct utxo *build_utxos(const tal_t *ctx,
u32 feerate_per_kw, u64 dust_limit,
u64 *change_amount, u32 *change_keyindex);
/* Once we've spent them, mark them confirmed. */
void confirm_utxos(struct lightningd *ld, struct utxo *utxos);
#endif /* LIGHTNING_LIGHTNINGD_BUILD_UTXOS_H */