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b29d1ed3ff
Note that it's channeld which calculates the shared secret, too. This minimizes the work that lightningd has to do, at cost of passing this through. We also don't yet save the blinding field(s) to the database. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
#ifndef LIGHTNING_CHANNELD_CHANNELD_HTLC_H
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#define LIGHTNING_CHANNELD_CHANNELD_HTLC_H
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#include "config.h"
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#include <bitcoin/locktime.h>
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#include <ccan/short_types/short_types.h>
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#include <common/amount.h>
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#include <common/htlc.h>
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#include <common/pseudorand.h>
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#include <wire/gen_onion_wire.h>
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struct htlc {
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/* What's the status. */
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enum htlc_state state;
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/* The unique ID for this peer and this direction (LOCAL or REMOTE) */
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u64 id;
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/* The amount in millisatoshi. */
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struct amount_msat amount;
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/* When the HTLC can no longer be redeemed. */
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struct abs_locktime expiry;
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/* The hash of the preimage which can redeem this HTLC */
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struct sha256 rhash;
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/* The preimage which hashes to rhash (if known) */
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struct preimage *r;
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/* If they fail the HTLC, we store why here. */
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const struct failed_htlc *failed;
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/* Routing information sent with this HTLC (outgoing only). */
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const u8 *routing;
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/* Blinding (optional). */
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struct pubkey *blinding;
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};
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static inline bool htlc_has(const struct htlc *h, int flag)
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{
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return htlc_state_flags(h->state) & flag;
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}
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static inline enum side htlc_owner(const struct htlc *h)
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{
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return htlc_state_owner(h->state);
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}
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/* htlc_map: ID -> htlc mapping. */
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static inline u64 htlc_key(const struct htlc *h)
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{
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return h->id;
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}
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static inline bool htlc_cmp(const struct htlc *h, u64 id)
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{
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return h->id == id;
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}
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static inline size_t htlc_hash(u64 id)
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{
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return siphash24(siphash_seed(), &id, sizeof(id));
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}
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HTABLE_DEFINE_TYPE(struct htlc, htlc_key, htlc_hash, htlc_cmp, htlc_map);
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static inline struct htlc *htlc_get(struct htlc_map *htlcs, u64 id, enum side owner)
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{
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struct htlc *h;
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struct htlc_map_iter it;
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for (h = htlc_map_getfirst(htlcs, id, &it);
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h;
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h = htlc_map_getnext(htlcs, id, &it)) {
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if (h->id == id && htlc_has(h, HTLC_FLAG(owner,HTLC_F_OWNER)))
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return h;
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}
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return NULL;
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}
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/* FIXME: Move these out of the hash! */
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static inline bool htlc_is_dead(const struct htlc *htlc)
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{
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return htlc->state == RCVD_REMOVE_ACK_REVOCATION
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|| htlc->state == SENT_REMOVE_ACK_REVOCATION;
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}
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#endif /* LIGHTNING_CHANNELD_CHANNELD_HTLC_H */
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