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#ifndef LIGHTNING_GOSSIPD_GOSSIPD_H
#define LIGHTNING_GOSSIPD_GOSSIPD_H
#include "config.h"
#include <bitcoin/block.h>
#include <ccan/bitmap/bitmap.h>
#include <ccan/list/list.h>
#include <ccan/short_types/short_types.h>
#include <ccan/timer/timer.h>
#include <common/bigsize.h>
#include <common/node_id.h>
/* We talk to `hsmd` to sign our gossip messages with the node key */
#define HSM_FD 3
/* connectd asks us for help finding nodes, and gossip fds for new peers */
#define CONNECTD_FD 4
struct chan;
struct broadcastable;
/*~ The core daemon structure: */
struct daemon {
/* Who am I? Helps us find ourself in the routing map. */
struct node_id id;
/* Peers we are gossiping to: id is unique */
struct list_head peers;
/* Current blockheight: 0 means we're not up-to-date. */
u32 current_blockheight;
/* Connection to lightningd. */
struct daemon_conn *master;
/* Connection to connect daemon. */
struct daemon_conn *connectd;
/* Routing information */
struct routing_state *rstate;
/* chainhash for checking/making gossip msgs */
struct bitcoin_blkid chain_hash;
/* Timers: we batch gossip, and also refresh announcements */
struct timers timers;
/* Global features to list in node_announcement. */
u8 *globalfeatures;
/* Alias (not NUL terminated) and favorite color for node_announcement */
u8 alias[32];
u8 rgb[3];
/* What addresses we can actually announce. */
struct wireaddr *announcable;
/* Do we think we're missing gossip? Contains timer to re-check */
struct oneshot *gossip_missing;
/* Channels we've heard about, but don't know. */
struct short_channel_id *unknown_scids;
/* Timer until we can send a new node_announcement */
struct oneshot *node_announce_timer;
/* Channels we have an announce for, but aren't deep enough. */
struct short_channel_id *deferred_txouts;
};
/*~ How gossipy do we ask a peer to be? */
enum gossip_level {
/* Give us everything since epoch */
GOSSIP_HIGH,
/* Give us everything from 24 hours ago. */
GOSSIP_MEDIUM,
/* Give us everything from now. */
GOSSIP_LOW,
/* Give us nothing. */
GOSSIP_NONE,
};
/* This represents each peer we're gossiping with */
struct peer {
/* daemon->peers */
struct list_node list;
/* parent pointer. */
struct daemon *daemon;
/* The ID of the peer (always unique) */
struct node_id id;
/* The two features gossip cares about (so far) */
bool gossip_queries_feature, initial_routing_sync_feature;
/* Are there outstanding responses for queries on short_channel_ids? */
const struct short_channel_id *scid_queries;
const bigsize_t *scid_query_flags;
size_t scid_query_idx;
/* Are there outstanding node_announcements from scid_queries? */
struct node_id *scid_query_nodes;
size_t scid_query_nodes_idx;
/* Do we have an scid_query outstanding? What to call when it's done? */
bool scid_query_outstanding;
void (*scid_query_cb)(struct peer *peer, bool complete);
/* How many pongs are we expecting? */
size_t num_pings_outstanding;
/* Map of outstanding channel_range requests. */
bitmap *query_channel_blocks;
/* What we're querying: [range_first_blocknum, range_end_blocknum) */
u32 range_first_blocknum, range_end_blocknum;
u32 range_blocks_remaining;
struct short_channel_id *query_channel_scids;
void (*query_channel_range_cb)(struct peer *peer,
u32 first_blocknum, u32 number_of_blocks,
const struct short_channel_id *scids,
bool complete);
/* Are we asking this peer to give us lot of gossip? */
enum gossip_level gossip_level;
/* The daemon_conn used to queue messages to/from the peer. */
struct daemon_conn *dc;
};
/* Search for a peer. */
struct peer *find_peer(struct daemon *daemon, const struct node_id *id);
/* Queue a gossip message for the peer: the subdaemon on the other end simply
* forwards it to the peer. */
void queue_peer_msg(struct peer *peer, const u8 *msg TAKES);
/* Queue a gossip_store message for the peer: the subdaemon on the
* other end simply forwards it to the peer. */
void queue_peer_from_store(struct peer *peer,
const struct broadcastable *bcast);
#endif /* LIGHTNING_GOSSIPD_GOSSIPD_H */