mirror of
https://github.com/aljazceru/lightning.git
synced 2025-12-20 15:44:21 +01:00
def3d77a70
The peer->seed needs to be unique for each channel, since bitcoin pubkeys and the shachain are generated from it. However we also need to guarantee that the same seed is generated for a given channel every time, e.g., upon a restart. The DB channel ID is guaranteed to be unique, and will not change throughout the lifetime of a channel, so we simply mix it in, instead of a separate increasing counter. We also needed to make sure to store in the DB before deriving the seed, in order to get an ID assigned by the DB. Signed-off-by: Christian Decker <decker.christian@gmail.com>
93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
#ifndef LIGHTNING_LIGHTNINGD_LIGHTNINGD_H
|
|
#define LIGHTNING_LIGHTNINGD_LIGHTNINGD_H
|
|
#include "config.h"
|
|
#include <bitcoin/chainparams.h>
|
|
#include <bitcoin/privkey.h>
|
|
#include <ccan/container_of/container_of.h>
|
|
#include <daemon/lightningd.h>
|
|
#include <lightningd/htlc_end.h>
|
|
#include <wallet/wallet.h>
|
|
|
|
/* BOLT #1:
|
|
*
|
|
* The default TCP port is 9735. This corresponds to hexadecimal
|
|
* `0x2607`, the Unicode code point for LIGHTNING.
|
|
*/
|
|
#define DEFAULT_PORT 0x2607
|
|
|
|
/* FIXME: This is two structures, during the migration from old setup to new */
|
|
struct lightningd {
|
|
/* Must be first, since things assume we can tal() off it */
|
|
struct lightningd_state dstate;
|
|
|
|
/* The directory to find all the subdaemons. */
|
|
const char *daemon_dir;
|
|
|
|
/* Log for general stuff. */
|
|
struct log *log;
|
|
|
|
/* Bearer of all my secrets. */
|
|
int hsm_fd;
|
|
|
|
/* Daemon looking after peers during init / before channel. */
|
|
struct subd *gossip;
|
|
|
|
/* All peers we're tracking. */
|
|
struct list_head peers;
|
|
/* FIXME: This should stay in HSM */
|
|
struct secret peer_seed;
|
|
/* Used to give a unique seed to every peer. */
|
|
u64 peer_counter;
|
|
|
|
/* Public base for bip32 keys, and max we've ever used. */
|
|
struct ext_key *bip32_base;
|
|
|
|
/* Our bitcoind context. */
|
|
struct bitcoind *bitcoind;
|
|
|
|
/* Our chain topology. */
|
|
struct chain_topology *topology;
|
|
|
|
/* If we want to debug a subdaemon. */
|
|
const char *dev_debug_subdaemon;
|
|
|
|
/* If we have a --dev-disconnect file */
|
|
int dev_disconnect_fd;
|
|
|
|
/* HTLCs in flight. */
|
|
struct htlc_in_map htlcs_in;
|
|
struct htlc_out_map htlcs_out;
|
|
|
|
u32 broadcast_interval;
|
|
|
|
struct wallet *wallet;
|
|
|
|
const struct chainparams *chainparams;
|
|
};
|
|
|
|
/**
|
|
* derive_peer_seed - Generate a unique secret for this peer's channel
|
|
*
|
|
* @ld: the lightning daemon to get global secret from
|
|
* @peer_seed: where to store the generated secret
|
|
* @peer_id: the id node_id of the remote peer
|
|
* @chan_id: channel ID
|
|
*
|
|
* This method generates a unique secret from the given parameters. It
|
|
* is important that this secret be unique for each channel, but it
|
|
* must be reproducible for the same channel in case of
|
|
* reconnection. We use the DB channel ID to guarantee unique secrets
|
|
* per channel.
|
|
*/
|
|
void derive_peer_seed(struct lightningd *ld, struct privkey *peer_seed,
|
|
const struct pubkey *peer_id, const u64 channel_id);
|
|
|
|
struct peer *find_peer_by_unique_id(struct lightningd *ld, u64 unique_id);
|
|
/* FIXME */
|
|
static inline struct lightningd *
|
|
ld_from_dstate(const struct lightningd_state *dstate)
|
|
{
|
|
return container_of(dstate, struct lightningd, dstate);
|
|
}
|
|
#endif /* LIGHTNING_LIGHTNINGD_LIGHTNINGD_H */
|