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#ifndef LIGHTNING_STATE_H
#define LIGHTNING_STATE_H
#include "config.h"
#include <ccan/tal/tal.h>
#include <state_types.h>
#include <stdbool.h>
/*
* This is the core state machine.
*
* Calling the state machine updates updates peer->state, and may call
* various peer_ callbacks. It also returns the status of the current
* command.
*/
static inline bool state_is_error(enum state s)
{
return s >= STATE_ERR_BREAKDOWN && s <= STATE_ERR_INTERNAL;
}
static inline bool state_is_shutdown(enum state s)
{
return s == STATE_SHUTDOWN || s == STATE_SHUTDOWN_COMMITTING;
}
static inline bool state_is_onchain(enum state s)
{
return s >= STATE_CLOSE_ONCHAIN_CHEATED
&& s <= STATE_CLOSE_ONCHAIN_MUTUAL;
}
static inline bool state_is_normal(enum state s)
{
return s == STATE_NORMAL || s == STATE_NORMAL_COMMITTING;
}
static inline bool state_is_opening(enum state s)
{
return s < STATE_NORMAL;
}
static inline bool state_is_waiting_for_anchor(enum state s)
{
return s == STATE_OPEN_WAITING_OURANCHOR
|| s == STATE_OPEN_WAITING_OURANCHOR_THEYCOMPLETED
|| s == STATE_OPEN_WAITING_THEIRANCHOR
|| s == STATE_OPEN_WAITING_THEIRANCHOR_THEYCOMPLETED;
}
static inline bool state_can_io(enum state s)
{
if (state_is_error(s))
return false;
if (s == STATE_CLOSED)
return false;
if (state_is_onchain(s))
return false;
return true;
}
static inline bool state_can_commit(enum state s)
{
return s == STATE_NORMAL || s == STATE_SHUTDOWN;
}
/* BOLT #2:
*
* A node MUST NOT send a `update_add_htlc` after a `close_shutdown`
*/
static inline bool state_can_add_htlc(enum state s)
{
return state_is_normal(s);
}
static inline bool state_can_remove_htlc(enum state s)
{
return state_is_normal(s) || state_is_shutdown(s);
}
struct peer;
struct bitcoin_tx;
struct commit_info;
static inline bool input_is_pkt(enum state_input input)
{
return input <= PKT_ERROR;
}
enum state state(struct peer *peer,
const enum state_input input,
const Pkt *pkt,
const struct bitcoin_tx **broadcast);
/* a == b? */
static inline bool input_is(enum state_input a, enum state_input b)
{
return a == b;
}
/**
* peer_watch_anchor: create a watch for the anchor transaction.
* @peer: the state data for this peer.
* @depth: depth at which to fire @depthok.
* @depthok: the input to give when anchor reaches expected depth.
* @timeout: the input to give if anchor doesn't reach depth in time.
*
* @depthok can be INPUT_NONE if it's our anchor (we don't time
* ourselves out).
*/
void peer_watch_anchor(struct peer *peer,
int depth,
enum state_input depthok,
enum state_input timeout);
/* Start creation of the bitcoin anchor tx. */
void bitcoin_create_anchor(struct peer *peer);
/* Get the bitcoin anchor tx. */
const struct bitcoin_tx *bitcoin_anchor(struct peer *peer);
/* We didn't end up broadcasting the anchor: release the utxos.
* If done != INPUT_NONE, remove existing create_anchor too. */
void bitcoin_release_anchor(struct peer *peer, enum state_input done);
#endif /* LIGHTNING_STATE_H */