core-lightning/lightningd/channel_control.h
Rusty Russell 41b379ed89 lightningd: hand fds to connectd, not receive them from connectd.
Before this patch:
1. connectd says it's connected (peer_connected)
2. we tell connectd we want to talk about each channel (peer_make_active)
3. connectd gives us an fd for each channel, and we connect it to a subd (peer_active)
4. OR, connectd says it sent something about a channel we didn't tell it about, with an fd (peer_active)

Now:
1. connectd says it's connected (peer_connected)
2. we start all appropriate subds and tell connectd to what channels/fds (peer_connect_subd).
3. if connectd says it sent something about a channel we didn't tell it about, we either tell
   it to hang up (peer_final_msg), or connect a new opening daemon (peer_connect_subd).

This is the minimal-size patch, which is why we create socket pairs in
so many places to use the existing functions.  Many cleanups are
possible, since the new flow is so simple.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2022-07-18 20:50:04 -05:00

47 lines
1.4 KiB
C

#ifndef LIGHTNING_LIGHTNINGD_CHANNEL_CONTROL_H
#define LIGHTNING_LIGHTNINGD_CHANNEL_CONTROL_H
#include "config.h"
#include <ccan/short_types/short_types.h>
#include <stdbool.h>
struct channel;
struct crypto_state;
struct lightningd;
struct peer_fd;
struct peer;
bool peer_start_channeld(struct channel *channel,
struct peer_fd *peer_fd,
const u8 *fwd_msg,
bool reconnected,
bool reestablish_only);
/* Returns true if subd told, otherwise false. */
bool channel_tell_depth(struct lightningd *ld,
struct channel *channel,
const struct bitcoin_txid *txid,
u32 depth);
/* Notify channels of new blocks. */
void channel_notify_new_block(struct lightningd *ld,
u32 block_height);
/* Cancel the channel after `fundchannel_complete` succeeds
* but before funding broadcasts. */
struct command_result *cancel_channel_before_broadcast(struct command *cmd,
struct peer *peer);
/* Update the channel info on funding locked */
bool channel_on_funding_locked(struct channel *channel,
struct pubkey *next_per_commitment_point);
/* Record channel open (coin movement notifications) */
void channel_record_open(struct channel *channel);
/* A channel has unrecoverably fallen behind */
void channel_fallen_behind(struct channel *channel, const u8 *msg);
/* Fresh channel_update for this channel. */
void channel_replace_update(struct channel *channel, u8 *update TAKES);
#endif /* LIGHTNING_LIGHTNINGD_CHANNEL_CONTROL_H */