21fb7600f3
This commit introduces a new field `invoice_msat` to the htlc_accepted hook. If this field is specified it will replace the amount of the invoice that belongs to the payment_hash of the HTLC on internal checks. This is useful in scenarios where we actually expect a smaller amount than initially specified in an invoice. Changelog-Changed: Plugins: `htlc_accepted` hook can now override the expected total amount of the invoice that belongs to the HTLC. Signed-off-by: Peter Neuroth <pet.v.ne@gmail.com>
93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
#ifndef LIGHTNING_LIGHTNINGD_HTLC_SET_H
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#define LIGHTNING_LIGHTNINGD_HTLC_SET_H
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#include "config.h"
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#include <ccan/crypto/sha256/sha256.h>
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#include <ccan/crypto/siphash24/siphash24.h>
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#include <ccan/htable/htable_type.h>
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#include <common/amount.h>
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#include <common/pseudorand.h>
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#include <common/utils.h>
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struct lightningd;
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struct logger;
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/* Could be an incoming HTLC, could be a local payment */
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struct incoming_payment {
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/* Where to log */
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struct logger *log;
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/* Amount of this payment */
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struct amount_msat msat;
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/* If it fails */
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void (*fail)(void *arg, const u8 *failmsg TAKES);
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/* If it succeeded: here's the preimage. */
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void (*succeeded)(void *arg, const struct preimage *preimage);
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void *arg;
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};
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/* Set of incoming HTLCs for multi-part-payments */
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struct htlc_set {
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struct lightningd *ld;
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struct amount_msat total_msat, so_far;
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struct sha256 payment_hash;
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struct incoming_payment **inpays;
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struct oneshot *timeout;
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};
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static inline const struct sha256 *keyof_htlc_set(const struct htlc_set *set)
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{
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return &set->payment_hash;
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}
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static inline size_t hash_payment_hash(const struct sha256 *payment_hash)
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{
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return siphash24(siphash_seed(), payment_hash, sizeof(&payment_hash));
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}
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static inline bool htlc_set_eq(const struct htlc_set *set,
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const struct sha256 *payment_hash)
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{
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return sha256_eq(payment_hash, &set->payment_hash);
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}
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HTABLE_DEFINE_NODUPS_TYPE(struct htlc_set,
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keyof_htlc_set,
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hash_payment_hash,
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htlc_set_eq,
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htlc_set_map);
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/* Handles arg: if it completes a set, calls invoice_try_pay */
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void htlc_set_add_(struct lightningd *ld,
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struct logger *log,
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struct amount_msat msat,
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struct amount_msat total_msat,
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const struct amount_msat *invoice_msat_override,
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const struct sha256 *payment_hash,
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const struct secret *payment_secret,
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void (*fail)(void *, const u8 *),
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void (*succeeded)(void *, const struct preimage *),
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void *arg);
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#define htlc_set_add(ld, log, msat, total_msat, invoice_msat_override, \
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payment_hash, payment_secret, fail, succeeded, arg)\
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htlc_set_add_((ld), (log), (msat), (total_msat), \
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(invoice_msat_override), (payment_hash), \
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(payment_secret), \
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typesafe_cb_postargs(void, void *, \
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(fail), (arg), \
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const u8 *), \
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typesafe_cb_postargs(void, void *, \
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(succeeded), (arg), \
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const struct preimage *), \
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(arg))
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/* Fail every htlc in the set: frees set. If failmsg is NULL/zero-length,
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* it sends each one a WIRE_INCORRECT_OR_UNKNOWN_PAYMENT_DETAILS. */
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#define htlc_set_fail(set, failmsg) \
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htlc_set_fail_((set), (failmsg), __FILE__, __LINE__)
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void htlc_set_fail_(struct htlc_set *set, const u8 *failmsg TAKES,
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const char *file, int line);
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/* Fulfill every htlc in the set: frees set */
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void htlc_set_fulfill(struct htlc_set *set, const struct preimage *preimage);
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#endif /* LIGHTNING_LIGHTNINGD_HTLC_SET_H */
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