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3f65f0f000
In the case where we can't decrypt the onion, we can't fail it in the normal way (which is encrypted using the onion shared secret), we need to respond with a update_fail_malformed_htlc message. Moreover, we need to remember this for persistence. This means that we really have three conclusions for an HTLC: fulfilled, failed, malformed. Fix up the logic everywhere which assumed failed or fulfilled. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
130 lines
3.4 KiB
C
130 lines
3.4 KiB
C
#ifndef LIGHTNING_LIGHTNINGD_HTLC_END_H
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#define LIGHTNING_LIGHTNINGD_HTLC_END_H
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#include "config.h"
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#include <ccan/htable/htable_type.h>
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#include <ccan/short_types/short_types.h>
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#include <daemon/htlc_state.h>
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#include <lightningd/sphinx.h>
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#include <wire/gen_onion_wire.h>
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/* We look up HTLCs by peer & id */
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struct htlc_key {
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struct peer *peer;
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u64 id;
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};
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/* Incoming HTLC */
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struct htlc_in {
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struct htlc_key key;
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u64 msatoshi;
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u32 cltv_expiry;
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struct sha256 payment_hash;
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enum htlc_state hstate;
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/* Onion information */
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u8 onion_routing_packet[TOTAL_PACKET_SIZE];
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/* Shared secret for us to send any failure message. */
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struct secret shared_secret;
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/* If we failed HTLC, here's the message. */
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const u8 *failuremsg;
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/* If it was malformed, here's the error. */
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enum onion_type malformed;
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/* If they fulfilled, here's the preimage. */
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struct preimage *preimage;
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};
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struct htlc_out {
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struct htlc_key key;
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u64 msatoshi;
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u32 cltv_expiry;
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struct sha256 payment_hash;
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enum htlc_state hstate;
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/* Onion information */
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u8 onion_routing_packet[TOTAL_PACKET_SIZE];
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/* If we failed HTLC, here's the message. */
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const u8 *failuremsg;
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/* If it was malformed, here's the error. */
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enum onion_type malformed;
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/* If we fulfilled, here's the preimage. */
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struct preimage *preimage;
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/* Where it's from, if not going to us. */
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struct htlc_in *in;
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/* Otherwise, payment command which created it. */
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struct pay_command *pay_command;
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};
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static inline const struct htlc_key *keyof_htlc_in(const struct htlc_in *in)
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{
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return &in->key;
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}
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static inline const struct htlc_key *keyof_htlc_out(const struct htlc_out *out)
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{
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return &out->key;
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}
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size_t hash_htlc_key(const struct htlc_key *htlc_key);
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static inline bool htlc_in_eq(const struct htlc_in *in, const struct htlc_key *k)
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{
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return in->key.peer == k->peer && in->key.id == k->id;
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}
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static inline bool htlc_out_eq(const struct htlc_out *out,
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const struct htlc_key *k)
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{
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return out->key.peer == k->peer && out->key.id == k->id;
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}
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HTABLE_DEFINE_TYPE(struct htlc_in, keyof_htlc_in, hash_htlc_key, htlc_in_eq,
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htlc_in_map);
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HTABLE_DEFINE_TYPE(struct htlc_out, keyof_htlc_out, hash_htlc_key, htlc_out_eq,
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htlc_out_map);
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struct htlc_in *find_htlc_in(const struct htlc_in_map *map,
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const struct peer *peer,
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u64 htlc_id);
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struct htlc_out *find_htlc_out(const struct htlc_out_map *map,
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const struct peer *peer,
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u64 htlc_id);
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/* You still need to connect_htlc_in this! */
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struct htlc_in *new_htlc_in(const tal_t *ctx,
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struct peer *peer, u64 id,
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u64 msatoshi, u32 cltv_expiry,
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const struct sha256 *payment_hash,
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const struct secret *shared_secret,
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const u8 *onion_routing_packet);
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/* You need to set the ID, then connect_htlc_out this! */
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struct htlc_out *new_htlc_out(const tal_t *ctx,
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struct peer *peer,
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u64 msatoshi, u32 cltv_expiry,
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const struct sha256 *payment_hash,
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const u8 *onion_routing_packet,
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struct htlc_in *in,
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struct pay_command *pc);
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void connect_htlc_in(struct htlc_in_map *map, struct htlc_in *hin);
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void connect_htlc_out(struct htlc_out_map *map, struct htlc_out *hout);
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struct htlc_out *htlc_out_check(const struct htlc_out *hout,
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const char *abortstr);
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struct htlc_in *htlc_in_check(const struct htlc_in *hin, const char *abortstr);
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#endif /* LIGHTNING_LIGHTNINGD_HTLC_END_H */
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