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#ifndef LIGHTNING_COMMON_FEE_STATES_H
#define LIGHTNING_COMMON_FEE_STATES_H
#include "config.h"
#include <ccan/tal/tal.h>
#include <common/htlc.h>
struct fee_states {
/* Current feerate in satoshis per 1000 weight: goes through same
* state machine as htlc addition, but can only have one rate at a
* time in any state and are never removed.
*
* We need to know if there's an actual change pending though (even if
* it's a "change" to an idential feerate!) so we use pointers.
*/
u32 *feerate[HTLC_STATE_INVALID];
};
/**
* new_fee_states: Initialize a fee_states structure as at open-of-channel.
* @ctx: the tal ctx to allocate off
* @funder: which side funded the channel (and thus, proposes fee updates).
* @feerate_per_kw: the initial feerate (if any).
*/
struct fee_states *new_fee_states(const tal_t *ctx,
enum side funder,
const u32 *feerate_per_kw);
/**
* dup_fee_states: copy a fee_states structure.
* @ctx: the tal ctx to allocate off
* @fee_states: the fee_states to copy.
*/
struct fee_states *dup_fee_states(const tal_t *ctx,
const struct fee_states *fee_states TAKES);
/**
* get_feerate: Get the current feerate
* @fee_states: the fee state machine
* @funder: which side funded the channel (and thus, proposes fee updates).
* @side: which side to get the feerate for
*/
u32 get_feerate(const struct fee_states *fee_states,
enum side funder,
enum side side);
/**
* first_fee_state: get the initial fee state.
* @funder: which side funded the channel (and thus, proposes fee updates).
*/
enum htlc_state first_fee_state(enum side funder);
/**
* last_fee_state: get the final fee state.
* @funder: which side funded the channel (and thus, proposes fee updates).
*/
enum htlc_state last_fee_state(enum side funder);
/**
* start_fee_update: feed a new fee update into state machine.
* @fee_states: the fee state machine
* @funder: which side funded the channel (and thus, proposes fee updates).
* @feerate_per_kw: the new feerate.
*/
void start_fee_update(struct fee_states *fee_states,
enum side funder,
u32 feerate_per_kw);
/**
* inc_fee_state: move this feerate to the next state.
* @fee_states: the fee state machine
* @hstate: state
*
* Moves fee_states[hstate] to fee_states[hstate+1], if not NULL.
* Returns true if it wasn't NULL.
*/
bool inc_fee_state(struct fee_states *fee_states, enum htlc_state hstate);
/* Marshal and unmarshal */
void towire_fee_states(u8 **pptr, const struct fee_states *fee_states);
/* FIXME: You must check that fee_states_valid! */
struct fee_states *fromwire_fee_states(const tal_t *ctx,
const u8 **cursor, size_t *max);
/**
* Is this fee_state struct valid for this funding side?
*/
bool fee_states_valid(const struct fee_states *fee_states, enum side funder);
#endif /* LIGHTNING_COMMON_FEE_STATES_H */