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#ifndef LIGHTNING_LIGHTNINGD_CHAINTOPOLOGY_H
#define LIGHTNING_LIGHTNINGD_CHAINTOPOLOGY_H
#include "config.h"
#include <bitcoin/block.h>
#include <bitcoin/tx.h>
#include <ccan/list/list.h>
#include <ccan/short_types/short_types.h>
#include <ccan/structeq/structeq.h>
#include <ccan/time/time.h>
#include <jsmn.h>
#include <lightningd/json.h>
#include <lightningd/watch.h>
#include <math.h>
#include <stddef.h>
struct bitcoin_tx;
struct bitcoind;
struct command;
struct lightningd;
struct peer;
struct txwatch;
/* FIXME: move all feerate stuff out to new lightningd/feerate.[ch] files */
enum feerate {
FEERATE_URGENT, /* Aka: aim for next block. */
FEERATE_NORMAL, /* Aka: next 4 blocks or so. */
FEERATE_SLOW, /* Aka: next 100 blocks or so. */
};
#define NUM_FEERATES (FEERATE_SLOW+1)
/* We keep the last three in case there are outliers (for min/max) */
#define FEE_HISTORY_NUM 3
/* Off topology->outgoing_txs */
struct outgoing_tx {
struct list_node list;
struct channel *channel;
const char *hextx;
struct bitcoin_txid txid;
void (*failed_or_success)(struct channel *channel, int exitstatus, const char *err);
};
struct block {
u32 height;
/* Actual header. */
struct bitcoin_block_hdr hdr;
/* Previous block (if any). */
struct block *prev;
/* Next block (if any). */
struct block *next;
/* Key for hash table */
struct bitcoin_blkid blkid;
/* And their associated index in the block */
u32 *txnums;
/* Full copy of txs (trimmed to txs list in connect_block) */
struct bitcoin_tx **full_txs;
};
/* Hash blocks by sha */
static inline const struct bitcoin_blkid *keyof_block_map(const struct block *b)
{
return &b->blkid;
}
static inline size_t hash_sha(const struct bitcoin_blkid *key)
{
size_t ret;
memcpy(&ret, key, sizeof(ret));
return ret;
}
static inline bool block_eq(const struct block *b, const struct bitcoin_blkid *key)
{
return bitcoin_blkid_eq(&b->blkid, key);
}
HTABLE_DEFINE_TYPE(struct block, keyof_block_map, hash_sha, block_eq, block_map);
struct chain_topology {
struct lightningd *ld;
struct block *root;
struct block *prev_tip, *tip;
struct block_map block_map;
u32 feerate[NUM_FEERATES];
bool feerate_uninitialized;
u32 feehistory[NUM_FEERATES][FEE_HISTORY_NUM];
/* Where to log things. */
struct log *log;
/* What range of blocks do we have in our database? */
u32 min_blockheight, max_blockheight;
/* How often to poll. */
u32 poll_seconds;
/* struct sync_waiters waiting for us to catch up with bitcoind (and
* once that has caught up with the network). NULL if we're already
* caught up. */
struct list_head *sync_waiters;
/* The bitcoind. */
struct bitcoind *bitcoind;
/* Our timer list. */
struct timers *timers;
/* Bitcoin transactions we're broadcasting */
struct list_head outgoing_txs;
/* Transactions/txos we are watching. */
struct txwatch_hash txwatches;
struct txowatch_hash txowatches;
};
/* Information relevant to locating a TX in a blockchain. */
struct txlocator {
/* The height of the block that includes this transaction */
u32 blkheight;
/* Position of the transaction in the transactions list */
u32 index;
};
/* This is the number of blocks which would have to be mined to invalidate
* the tx */
size_t get_tx_depth(const struct chain_topology *topo,
const struct bitcoin_txid *txid);
/* Get highest block number. */
u32 get_block_height(const struct chain_topology *topo);
/* Get fee rate in satoshi per kiloweight, or 0 if unavailable! */
u32 try_get_feerate(const struct chain_topology *topo, enum feerate feerate);
/* Get range of feerates to insist other side abide by for normal channels.
* If we have to guess, sets *unknown to true, otherwise false. */
u32 feerate_min(struct lightningd *ld, bool *unknown);
u32 feerate_max(struct lightningd *ld, bool *unknown);
u32 mutual_close_feerate(struct chain_topology *topo);
u32 opening_feerate(struct chain_topology *topo);
u32 unilateral_feerate(struct chain_topology *topo);
/* We always use feerate-per-ksipa, ie. perkw */
u32 feerate_from_style(u32 feerate, enum feerate_style style);
u32 feerate_to_style(u32 feerate_perkw, enum feerate_style style);
const char *feerate_name(enum feerate feerate);
/* Set feerate_per_kw to this estimate & return NULL, or fail cmd */
struct command_result *param_feerate_estimate(struct command *cmd,
u32 **feerate_per_kw,
enum feerate feerate);
/* Broadcast a single tx, and rebroadcast as reqd (copies tx).
* If failed is non-NULL, call that and don't rebroadcast. */
void broadcast_tx(struct chain_topology *topo,
struct channel *channel, const struct bitcoin_tx *tx,
void (*failed)(struct channel *channel,
int exitstatus,
const char *err));
struct chain_topology *new_topology(struct lightningd *ld, struct log *log);
void setup_topology(struct chain_topology *topology, struct timers *timers,
u32 min_blockheight, u32 max_blockheight);
void begin_topology(struct chain_topology *topo);
struct txlocator *locate_tx(const void *ctx, const struct chain_topology *topo, const struct bitcoin_txid *txid);
static inline bool topology_synced(const struct chain_topology *topo)
{
return topo->sync_waiters == NULL;
}
/**
* topology_add_sync_waiter: wait for lightningd to sync with bitcoin network
* @ctx: context to allocate the waiter from.
* @topo: chain topology
* @cb: callback to call when we're synced.
* @arg: arg for @cb
*
* topology_synced() must be false when this is called. It will be true
* when @cb is called. @cb will not be called if @ctx is freed first.
*/
void topology_add_sync_waiter_(const tal_t *ctx,
struct chain_topology *topo,
void (*cb)(struct chain_topology *topo,
void *arg),
void *arg);
#define topology_add_sync_waiter(ctx, topo, cb, arg) \
topology_add_sync_waiter_((ctx), (topo), \
typesafe_cb_preargs(void, void *, \
(cb), (arg), \
struct chain_topology *), \
(arg))
/* In channel_control.c */
void notify_feerate_change(struct lightningd *ld);
#endif /* LIGHTNING_LIGHTNINGD_CHAINTOPOLOGY_H */