core-lightning/plugins/renepay/disabledmap.h

#ifndef LIGHTNING_PLUGINS_RENEPAY_DISABLEDMAP_H
#define LIGHTNING_PLUGINS_RENEPAY_DISABLEDMAP_H

#include "config.h"
#include <bitcoin/short_channel_id.h>
#include <ccan/bitmap/bitmap.h>
#include <ccan/htable/htable_type.h>
#include <common/gossmap.h>
#include <common/node_id.h>

static inline size_t hash_scidd(const struct short_channel_id_dir scidd)
{
	/* scids cost money to generate, so simple hash works here. Letting same
	 * scid with two directions collide. */
	return (scidd.scid.u64 >> 32) ^ (scidd.scid.u64 >> 16) ^ scidd.scid.u64;
}

static inline struct short_channel_id_dir
self_scidd(const struct short_channel_id_dir *self)
{
	return *self;
}

static inline bool
my_short_channel_id_dir_eq(const struct short_channel_id_dir *scidd_a,
			   const struct short_channel_id_dir scidd_b)
{
	return short_channel_id_eq(scidd_a->scid, scidd_b.scid) &&
	       scidd_a->dir == scidd_b.dir;
}

/* A htable for short_channel_id_dir, the structure itself is the element key.
 */
HTABLE_DEFINE_TYPE(struct short_channel_id_dir, self_scidd, hash_scidd,
		   my_short_channel_id_dir_eq, scidd_map);

struct disabledmap {
	/* Channels we decided to disable for various reasons. */
	struct scidd_map *disabled_map;
	tal_t *disabled_ctx;

	/* Channels that we flagged for failures. If warned two times we will
	 * disable it. */
	struct scidd_map *warned_map;
	tal_t *warned_ctx;

	/* nodes we disable */
	// FIXME: use a map also for nodes
	struct node_id *disabled_nodes;
};

void disabledmap_reset(struct disabledmap *p);
struct disabledmap *disabledmap_new(const tal_t *ctx);
void disabledmap_add_channel(struct disabledmap *p,
			     struct short_channel_id_dir scidd);
void disabledmap_warn_channel(struct disabledmap *p,
			      struct short_channel_id_dir scidd);
void disabledmap_add_node(struct disabledmap *p, struct node_id node);
bool disabledmap_channel_is_warned(struct disabledmap *p,
				   struct short_channel_id_dir scidd);
bitmap *tal_disabledmap_get_bitmap(const tal_t *ctx, struct disabledmap *p,
				   const struct gossmap *gossmap);

#endif /* LIGHTNING_PLUGINS_RENEPAY_DISABLEDMAP_H */