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#ifndef LIGHTNING_LIGHTNINGD_HTLC_END_H
#define LIGHTNING_LIGHTNINGD_HTLC_END_H
#include "config.h"
#include <ccan/htable/htable_type.h>
#include <ccan/short_types/short_types.h>
#include <ccan/time/time.h>
#include <common/amount.h>
#include <common/htlc_state.h>
#include <common/sphinx.h>
#include <wire/gen_onion_wire.h>
/* We look up HTLCs by channel & id */
struct htlc_key {
struct channel *channel;
u64 id;
};
#define HTLC_INVALID_ID (-1ULL)
/* Incoming HTLC */
struct htlc_in {
/* The database primary key for this htlc. Must be 0 until it
* is saved to the database, must be >0 after saving to the
* database. */
u64 dbid;
struct htlc_key key;
struct amount_msat msat;
u32 cltv_expiry;
struct sha256 payment_hash;
enum htlc_state hstate;
/* Onion information */
u8 onion_routing_packet[TOTAL_PACKET_SIZE];
/* Shared secret for us to send any failure message (NULL if malformed) */
struct secret *shared_secret;
/* If we couldn't decode the onion, this contains the error code.. */
enum onion_type badonion;
/* Otherwise, this contains the failure message to send. */
const struct onionreply *failonion;
/* If they fulfilled, here's the preimage. */
struct preimage *preimage;
/* Remember the timestamp we received this HTLC so we can later record
* it, and the resolution time, in the forwards table. */
struct timeabs received_time;
/* If it was blinded. */
struct pubkey *blinding;
/* Only set if blinding != NULL */
struct secret blinding_ss;
};
struct htlc_out {
/* The database primary key for this htlc. Must be 0 until it
* is saved to the database, must be >0 after saving to the
* database. */
u64 dbid;
struct htlc_key key;
struct amount_msat msat;
u32 cltv_expiry;
struct sha256 payment_hash;
enum htlc_state hstate;
/* Onion information */
u8 onion_routing_packet[TOTAL_PACKET_SIZE];
/* If a local error, this is non-NULL. */
const u8 *failmsg;
/* For a remote error. */
const struct onionreply *failonion;
/* If we fulfilled, here's the preimage. */
/* FIXME: This is basically unused, except as a bool! */
struct preimage *preimage;
/* Is this a locally-generated payment? Implies ->in is NULL. */
bool am_origin;
/* If am_origin, this is the partid of the payment. */
u64 partid;
/* Where it's from, if not going to us. */
struct htlc_in *in;
/* Blinding to send alongside, if any. */
struct pubkey *blinding;
};
static inline const struct htlc_key *keyof_htlc_in(const struct htlc_in *in)
{
return &in->key;
}
static inline const struct htlc_key *keyof_htlc_out(const struct htlc_out *out)
{
return &out->key;
}
size_t hash_htlc_key(const struct htlc_key *htlc_key);
static inline bool htlc_in_eq(const struct htlc_in *in, const struct htlc_key *k)
{
return in->key.channel == k->channel && in->key.id == k->id;
}
static inline bool htlc_out_eq(const struct htlc_out *out,
const struct htlc_key *k)
{
return out->key.channel == k->channel && out->key.id == k->id;
}
HTABLE_DEFINE_TYPE(struct htlc_in, keyof_htlc_in, hash_htlc_key, htlc_in_eq,
htlc_in_map);
HTABLE_DEFINE_TYPE(struct htlc_out, keyof_htlc_out, hash_htlc_key, htlc_out_eq,
htlc_out_map);
struct htlc_in *find_htlc_in(const struct htlc_in_map *map,
const struct channel *channel,
u64 htlc_id);
/* FIXME: Slow function only used at startup. */
struct htlc_in *remove_htlc_in_by_dbid(struct htlc_in_map *remaining_htlcs_in,
u64 dbid);
struct htlc_out *find_htlc_out(const struct htlc_out_map *map,
const struct channel *channel,
u64 htlc_id);
/* You still need to connect_htlc_in this! */
struct htlc_in *new_htlc_in(const tal_t *ctx,
struct channel *channel, u64 id,
struct amount_msat msat, u32 cltv_expiry,
const struct sha256 *payment_hash,
const struct secret *shared_secret TAKES,
const struct pubkey *blinding TAKES,
const struct secret *blinding_ss,
const u8 *onion_routing_packet);
/* You need to set the ID, then connect_htlc_out this! */
struct htlc_out *new_htlc_out(const tal_t *ctx,
struct channel *channel,
struct amount_msat msat,
u32 cltv_expiry,
const struct sha256 *payment_hash,
const u8 *onion_routing_packet,
const struct pubkey *blinding,
bool am_origin,
u64 partid,
struct htlc_in *in);
void connect_htlc_in(struct htlc_in_map *map, struct htlc_in *hin);
void connect_htlc_out(struct htlc_out_map *map, struct htlc_out *hout);
/* Set up hout->in to be hin (non-NULL), and clear if hin freed. */
void htlc_out_connect_htlc_in(struct htlc_out *hout, struct htlc_in *hin);
struct htlc_out *htlc_out_check(const struct htlc_out *hout,
const char *abortstr);
struct htlc_in *htlc_in_check(const struct htlc_in *hin, const char *abortstr);
#endif /* LIGHTNING_LIGHTNINGD_HTLC_END_H */