mirror of
https://github.com/ElementsProject/lightning.git
synced 2024-11-19 18:11:28 +01:00
209 lines
7.2 KiB
C
209 lines
7.2 KiB
C
#ifndef LIGHTNING_COMMON_GOSSMAP_H
|
|
#define LIGHTNING_COMMON_GOSSMAP_H
|
|
#include "config.h"
|
|
#include <bitcoin/short_channel_id.h>
|
|
#include <ccan/take/take.h>
|
|
#include <ccan/typesafe_cb/typesafe_cb.h>
|
|
#include <common/amount.h>
|
|
#include <common/fp16.h>
|
|
|
|
struct node_id;
|
|
struct point32;
|
|
|
|
struct gossmap_node {
|
|
/* Offset in memory map for node_announce, or 0. */
|
|
u32 nann_off;
|
|
u32 num_chans;
|
|
u32 *chan_idxs;
|
|
};
|
|
|
|
struct gossmap_chan {
|
|
u32 cann_off;
|
|
u32 private: 1;
|
|
/* Technically redundant, but we have a hole anyway: from cann_off */
|
|
u32 plus_scid_off: 31;
|
|
/* Offsets of cupdates (0 if missing). Logically inside half_chan,
|
|
* but that would add padding. */
|
|
u32 cupdate_off[2];
|
|
/* two nodes we connect (lesser idx first) */
|
|
struct half_chan {
|
|
/* Top bit indicates it's enabled */
|
|
u32 enabled: 1;
|
|
u32 nodeidx : 31;
|
|
fp16_t htlc_min, htlc_max;
|
|
|
|
/* millisatoshi. */
|
|
u64 base_fee : 24;
|
|
/* millionths */
|
|
u64 proportional_fee : 20;
|
|
/* Delay for HTLC in blocks. */
|
|
u64 delay : 20;
|
|
} half[2];
|
|
};
|
|
|
|
/* If num_channel_updates_rejected is not NULL, indicates how many channels we
|
|
* marked inactive because their values were too high to be represented. */
|
|
struct gossmap *gossmap_load(const tal_t *ctx, const char *filename,
|
|
size_t *num_channel_updates_rejected);
|
|
|
|
/* Call this before using to ensure it's up-to-date. Returns true if something
|
|
* was updated. Note: this can scramble node and chan indexes! */
|
|
bool gossmap_refresh(struct gossmap *map, size_t *num_channel_updates_rejected);
|
|
|
|
/* Local modifications. */
|
|
struct gossmap_localmods *gossmap_localmods_new(const tal_t *ctx);
|
|
|
|
/* Create a local-only channel; if this conflicts with a real channel when added,
|
|
* that will be used instead.
|
|
* Returns false (and does nothing) if scid was already in localmods.
|
|
*/
|
|
bool gossmap_local_addchan(struct gossmap_localmods *localmods,
|
|
const struct node_id *n1,
|
|
const struct node_id *n2,
|
|
const struct short_channel_id *scid,
|
|
const u8 *features)
|
|
NON_NULL_ARGS(1,2,3,4);
|
|
|
|
/* Create a local-only channel_update: can apply to lcoal-only or
|
|
* normal channels. Returns false if amounts don't fit in our
|
|
* internal representation (implies channel unusable anyway). */
|
|
bool gossmap_local_updatechan(struct gossmap_localmods *localmods,
|
|
const struct short_channel_id *scid,
|
|
struct amount_msat htlc_min,
|
|
struct amount_msat htlc_max,
|
|
u32 base_fee,
|
|
u32 proportional_fee,
|
|
u16 delay,
|
|
bool enabled,
|
|
int dir)
|
|
NO_NULL_ARGS;
|
|
|
|
/* Apply localmods to this map */
|
|
void gossmap_apply_localmods(struct gossmap *map,
|
|
struct gossmap_localmods *localmods);
|
|
|
|
/* Remove localmods from this map */
|
|
void gossmap_remove_localmods(struct gossmap *map,
|
|
const struct gossmap_localmods *localmods);
|
|
|
|
/* Each channel has a unique (low) index. */
|
|
u32 gossmap_node_idx(const struct gossmap *map, const struct gossmap_node *node);
|
|
u32 gossmap_chan_idx(const struct gossmap *map, const struct gossmap_chan *chan);
|
|
|
|
/* Every node_idx/chan_idx will be < these.
|
|
* These values can change across calls to gossmap_check. */
|
|
u32 gossmap_max_node_idx(const struct gossmap *map);
|
|
u32 gossmap_max_chan_idx(const struct gossmap *map);
|
|
|
|
/* Find node with this node_id */
|
|
struct gossmap_node *gossmap_find_node(const struct gossmap *map,
|
|
const struct node_id *id);
|
|
/* Find chan with this short_channel_id */
|
|
struct gossmap_chan *gossmap_find_chan(const struct gossmap *map,
|
|
const struct short_channel_id *scid);
|
|
|
|
/* Get the short_channel_id of this chan */
|
|
struct short_channel_id gossmap_chan_scid(const struct gossmap *map,
|
|
const struct gossmap_chan *c);
|
|
|
|
/* Given a struct node, get the node_id */
|
|
void gossmap_node_get_id(const struct gossmap *map,
|
|
const struct gossmap_node *node,
|
|
struct node_id *id);
|
|
|
|
/* Do we have any values for this halfchannel ? */
|
|
static inline bool gossmap_chan_set(const struct gossmap_chan *chan, int dir)
|
|
{
|
|
return chan->cupdate_off[dir] != 0;
|
|
}
|
|
|
|
/* Return capacity if it's known (fails only on race condition) */
|
|
bool gossmap_chan_get_capacity(const struct gossmap *map,
|
|
const struct gossmap_chan *c,
|
|
struct amount_sat *amount);
|
|
|
|
/* Get the announcement msg which created this chan */
|
|
u8 *gossmap_chan_get_announce(const tal_t *ctx,
|
|
const struct gossmap *map,
|
|
const struct gossmap_chan *c);
|
|
|
|
/* Get the announcement msg (if any) for this node. */
|
|
u8 *gossmap_node_get_announce(const tal_t *ctx,
|
|
const struct gossmap *map,
|
|
const struct gossmap_node *n);
|
|
|
|
/* Return the feature bit (odd or even), or -1 if neither. */
|
|
int gossmap_chan_get_feature(const struct gossmap *map,
|
|
const struct gossmap_chan *c,
|
|
int fbit);
|
|
|
|
/* Return the feature bitmap */
|
|
u8 *gossmap_chan_get_features(const tal_t *ctx,
|
|
const struct gossmap *map,
|
|
const struct gossmap_chan *c);
|
|
|
|
/* Return the feature bit (odd or even), or -1 if neither (or no announcement) */
|
|
int gossmap_node_get_feature(const struct gossmap *map,
|
|
const struct gossmap_node *n,
|
|
int fbit);
|
|
|
|
/* Returns details from channel_update (must be gossmap_chan_set, and
|
|
* does not work for local_updatechan! */
|
|
void gossmap_chan_get_update_details(const struct gossmap *map,
|
|
const struct gossmap_chan *chan,
|
|
int dir,
|
|
u32 *timestamp,
|
|
u8 *message_flags,
|
|
u8 *channel_flags,
|
|
u32 *fee_base_msat,
|
|
u32 *fee_proportional_millionths,
|
|
struct amount_msat *htlc_minimum_msat,
|
|
/* iff message_flags & 1 */
|
|
struct amount_msat *htlc_maximum_msat);
|
|
|
|
/* Given a struct node, get the nth channel, and tell us if we're half[0/1].
|
|
* n must be less than node->num_chans */
|
|
struct gossmap_chan *gossmap_nth_chan(const struct gossmap *map,
|
|
const struct gossmap_node *node,
|
|
u32 n,
|
|
int *which_half);
|
|
|
|
/* Given a struct chan, get the nth node, where n is 0 or 1. */
|
|
struct gossmap_node *gossmap_nth_node(const struct gossmap *map,
|
|
const struct gossmap_chan *chan,
|
|
int n);
|
|
|
|
/* Can this channel send this amount? */
|
|
bool gossmap_chan_capacity(const struct gossmap_chan *chan,
|
|
int direction,
|
|
struct amount_msat amount);
|
|
|
|
/* Remove a channel from the map (warning! realloc can move gossmap_chan
|
|
* and gossmap_node ptrs!) */
|
|
void gossmap_remove_chan(struct gossmap *map, struct gossmap_chan *chan);
|
|
|
|
/* Remove node (by removing all its channels) */
|
|
void gossmap_remove_node(struct gossmap *map, struct gossmap_node *node);
|
|
|
|
/* Unsorted iterate through (do not add/remove channels or nodes!) */
|
|
size_t gossmap_num_nodes(const struct gossmap *map);
|
|
|
|
struct gossmap_node *gossmap_first_node(const struct gossmap *map);
|
|
struct gossmap_node *gossmap_next_node(const struct gossmap *map,
|
|
const struct gossmap_node *prev);
|
|
|
|
/* Unsorted iterate through (do not add/remove channels or nodes!) */
|
|
size_t gossmap_num_chans(const struct gossmap *map);
|
|
|
|
struct gossmap_chan *gossmap_first_chan(const struct gossmap *map);
|
|
struct gossmap_chan *gossmap_next_chan(const struct gossmap *map,
|
|
struct gossmap_chan *prev);
|
|
|
|
/* Each x-only pubkey has two possible values: we can figure out which by
|
|
* examining the gossmap. */
|
|
void gossmap_guess_node_id(const struct gossmap *map,
|
|
const struct point32 *point32,
|
|
struct node_id *id);
|
|
|
|
#endif /* LIGHTNING_COMMON_GOSSMAP_H */
|