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#ifndef LIGHTNING_GOSSIPD_GOSSIP_STORE_H
#define LIGHTNING_GOSSIPD_GOSSIP_STORE_H
#include "config.h"
#include <bitcoin/short_channel_id.h>
#include <ccan/short_types/short_types.h>
#include <ccan/tal/tal.h>
#include <gossipd/routing.h>
/**
* gossip_store -- On-disk storage related information
*/
struct gossip_store;
struct routing_state;
struct gossip_store *gossip_store_new(struct routing_state *rstate,
struct list_head *peers);
/**
* Load the initial gossip store, if any.
*
* @param rstate The routing state to load init.
* @param gs The `gossip_store` to read from
*
* Returns the last-modified time of the store, or 0 if it was created new.
*/
u32 gossip_store_load(struct routing_state *rstate, struct gossip_store *gs);
/**
* Add a private channel_update message to the gossip_store
*/
u64 gossip_store_add_private_update(struct gossip_store *gs, const u8 *update);
/**
* Add a gossip message to the gossip_store (and optional addendum)
* @gs: gossip store
* @gossip_msg: the gossip message to insert.
* @timestamp: the timestamp for filtering of this messsage.
* @push: true if this should be sent to peers despite any timestamp filters.
* @addendum: another message to append immediately after this
* (for appending amounts to channel_announcements for internal use).
*/
u64 gossip_store_add(struct gossip_store *gs, const u8 *gossip_msg,
u32 timestamp, bool push, const u8 *addendum);
/**
* Delete the broadcast associated with this (if any).
*
* In developer mode, checks that type is correct.
*/
void gossip_store_delete(struct gossip_store *gs,
struct broadcastable *bcast,
int type);
/**
* Mark that the channel is about to be deleted, for convenience of
* others mapping the gossip_store.
*/
void gossip_store_mark_channel_deleted(struct gossip_store *gs,
const struct short_channel_id *scid);
/**
* Direct store accessor: loads gossip msg back from store.
*
* Caller must ensure offset != 0. Never returns NULL.
*/
const u8 *gossip_store_get(const tal_t *ctx,
struct gossip_store *gs,
u64 offset);
/**
* Direct store accessor: loads private gossip msg back from store.
*
* Caller must ensure offset != 0. Never returns NULL.
*/
const u8 *gossip_store_get_private_update(const tal_t *ctx,
struct gossip_store *gs,
u64 offset);
/* Exposed for dev-compact-gossip-store to force compaction. */
bool gossip_store_compact(struct gossip_store *gs);
/**
* Get a readonly fd for the gossip_store.
* @gs: the gossip store.
*
* Returns -1 on failure, and sets errno.
*/
int gossip_store_readonly_fd(struct gossip_store *gs);
/* Callback inside gossipd when store is compacted */
void update_peers_broadcast_index(struct list_head *peers, u32 offset);
#endif /* LIGHTNING_GOSSIPD_GOSSIP_STORE_H */