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funding: funding_find_htlc and funding_remove_htlc.

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Helpers for daemon.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2016-01-22 06:41:47 +10:30
parent 6d6abd57e7
commit d5c30ee30b
2 changed files with 40 additions and 0 deletions
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22
funding.c
View file

@ -1,5 +1,6 @@
#include "funding.h" #include "funding.h"
#include <assert.h> #include <assert.h>
#include <ccan/structeq/structeq.h>
#include <string.h> #include <string.h>
static bool subtract_fees(uint64_t *funder, uint64_t *non_funder, static bool subtract_fees(uint64_t *funder, uint64_t *non_funder,
@ -154,6 +155,27 @@ void funding_add_htlc(struct channel_oneside *creator,
creator->htlcs[n].rhash = *rhash; creator->htlcs[n].rhash = *rhash;
} }
size_t funding_find_htlc(struct channel_oneside *creator,
const struct sha256 *rhash)
{
size_t i;
for (i = 0; i < tal_count(creator->htlcs); i++) {
if (structeq(&creator->htlcs[i].rhash, rhash))
break;
}
return i;
}
void funding_remove_htlc(struct channel_oneside *creator, size_t i)
{
size_t n = tal_count(creator->htlcs);
assert(i < n);
memmove(creator->htlcs + i, creator->htlcs + i + 1,
(n - i - 1) * sizeof(*creator->htlcs));
tal_resize(&creator->htlcs, n-1);
}
struct channel_state *copy_funding(const tal_t *ctx, struct channel_state *copy_funding(const tal_t *ctx,
const struct channel_state *cstate) const struct channel_state *cstate)
{ {

18
funding.h
View file

@ -85,4 +85,22 @@ void funding_add_htlc(struct channel_oneside *creator,
u32 msatoshis, const struct abs_locktime *expiry, u32 msatoshis, const struct abs_locktime *expiry,
const struct sha256 *rhash); const struct sha256 *rhash);
/**
* funding_find_htlc: find an HTLC on this side of the channel.
* @creator: channel_state->a or channel_state->b, whichever originated htlc
* @rhash: hash of redeem secret
*
* Returns a number < tal_count(creator->htlcs), or == tal_count(creator->htlcs)
* on fail.
*/
size_t funding_find_htlc(struct channel_oneside *creator,
const struct sha256 *rhash);
/**
* funding_remove_htlc: remove an HTLC from this side of the channel.
* @creator: channel_state->a or channel_state->b, whichever originated htlc
* @i: index returned from funding_find_htlc.
*/
void funding_remove_htlc(struct channel_oneside *creator, size_t i);
#endif /* LIGHTNING_FUNDING_H */ #endif /* LIGHTNING_FUNDING_H */