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/* This represents a channel with no HTLCs: all that's required for openingd. */
#ifndef LIGHTNING_COMMON_INITIAL_CHANNEL_H
#define LIGHTNING_COMMON_INITIAL_CHANNEL_H
#include "config.h"
#include <bitcoin/pubkey.h>
#include <bitcoin/shadouble.h>
#include <ccan/short_types/short_types.h>
#include <ccan/tal/tal.h>
#include <common/amount.h>
#include <common/channel_config.h>
#include <common/derive_basepoints.h>
#include <common/htlc.h>
#include <stdbool.h>
struct signature;
struct added_htlc;
struct failed_htlc;
struct fulfilled_htlc;
/* View from each side */
struct channel_view {
/* Current feerate in satoshis per 1000 weight. */
u32 feerate_per_kw;
/* How much is owed to each side (includes pending changes) */
struct amount_msat owed[NUM_SIDES];
};
struct channel {
/* Funding txid and output. */
struct bitcoin_txid funding_txid;
unsigned int funding_txout;
/* Keys used to spend funding tx. */
struct pubkey funding_pubkey[NUM_SIDES];
/* satoshis in from commitment tx */
struct amount_sat funding;
/* Who is paying fees. */
enum side funder;
/* Limits and settings on this channel. */
struct channel_config config[NUM_SIDES];
/* Basepoints for deriving keys. */
struct basepoints basepoints[NUM_SIDES];
/* Mask for obscuring the encoding of the commitment number. */
u64 commitment_number_obscurer;
/* All live HTLCs for this channel */
struct htlc_map *htlcs;
/* Do we have changes pending for ourselves/other? */
bool changes_pending[NUM_SIDES];
/* What it looks like to each side. */
struct channel_view view[NUM_SIDES];
/* Chain params to check against */
const struct chainparams *chainparams;
};
/**
* new_initial_channel: Given initial fees and funding, what is initial state?
* @ctx: tal context to allocate return value from.
* @chain_hash: Which blockchain are we talking about?
* @funding_txid: The commitment transaction id.
* @funding_txout: The commitment transaction output number.
* @funding_satoshis: The commitment transaction amount.
* @local_msatoshi: The amount for the local side (remainder goes to remote)
* @feerate_per_kw: feerate per kiloweight (satoshis) for the commitment
* transaction and HTLCS (at this stage, same for both sides)
* @local: local channel configuration
* @remote: remote channel configuration
* @local_basepoints: local basepoints.
* @remote_basepoints: remote basepoints.
* @local_fundingkey: local funding key
* @remote_fundingkey: remote funding key
* @funder: which side initiated it.
*
* Returns channel, or NULL if malformed.
*/
struct channel *new_initial_channel(const tal_t *ctx,
const struct bitcoin_blkid *chain_hash,
const struct bitcoin_txid *funding_txid,
unsigned int funding_txout,
struct amount_sat funding,
struct amount_msat local_msatoshi,
u32 feerate_per_kw,
const struct channel_config *local,
const struct channel_config *remote,
const struct basepoints *local_basepoints,
const struct basepoints *remote_basepoints,
const struct pubkey *local_funding_pubkey,
const struct pubkey *remote_funding_pubkey,
enum side funder);
/**
* initial_channel_tx: Get the current commitment tx for the *empty* channel.
* @ctx: tal context to allocate return value from.
* @wscript: wscripts for the commitment tx.
* @channel: The channel to evaluate
* @per_commitment_point: Per-commitment point to determine keys
* @side: which side to get the commitment transaction for
*
* Returns the unsigned initial commitment transaction for @side, or NULL
* if the channel size was insufficient to cover fees or reserves.
*/
struct bitcoin_tx *initial_channel_tx(const tal_t *ctx,
const u8 **wscript,
const struct channel *channel,
const struct pubkey *per_commitment_point,
enum side side);
#endif /* LIGHTNING_COMMON_INITIAL_CHANNEL_H */