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#ifndef LIGHTNING_LIGHTNINGD_COMMIT_TX_H
#define LIGHTNING_LIGHTNINGD_COMMIT_TX_H
#include "config.h"
#include <daemon/htlc.h>
struct pubkey;
struct sha256_double;
/* BOLT #3:
*
* This obscures the number of commitments made on the channel in the
* case of unilateral close, yet still provides a useful index for
* both nodes (who know the `payment_basepoint`s) to quickly find a
* revoked commitment transaction.
*/
u64 commit_number_obscurer(const struct pubkey *opener_payment_basepoint,
const struct pubkey *accepter_payment_basepoint);
/* commit_tx needs to know these so it knows what outputs to trim */
u64 htlc_success_fee(u64 feerate_per_kw);
u64 htlc_timeout_fee(u64 feerate_per_kw);
/**
* commit_tx_num_untrimmed: how many of these htlc outputs will commit tx have?
* @htlcs: tal_arr of HTLCs
* @feerate_per_kw: feerate to use
* @dust_limit_satoshis: dust limit below which to trim outputs.
* @side: from which side's point of view
*
* We need @side because HTLC fees are different for offered and
* received HTLCs.
*/
size_t commit_tx_num_untrimmed(const struct htlc **htlcs,
u64 feerate_per_kw, u64 dust_limit_satoshis,
enum side side);
/* Helper to calculate the base fee if we add this extra htlc */
u64 commit_tx_base_fee(u64 feerate_per_kw, size_t num_untrimmed_htlcs);
/**
* commit_tx: create (unsigned) commitment tx to spend the funding tx output
* @ctx: context to allocate transaction and @htlc_map from.
* @funding_txid, @funding_out, @funding_satoshis: funding outpoint.
* @funder: is the LOCAL or REMOTE paying the fee?
* @revocation_pubkey: revocation pubkey for this @side
* @self_delayedey: pubkey for delayed payments to this @side
* @selfkey: pubkey for HTLC payments to this @side
* @otherkey: pubkey for direct and HTLC payments to other side @side
* @feerate_per_kw: feerate to use
* @dust_limit_satoshis: dust limit below which to trim outputs.
* @self_pay_msat: amount to pay directly to self
* @other_pay_msat: amount to pay directly to the other side
* @htlcs: tal_arr of htlcs committed by transaction (some may be trimmed)
* @htlc_map: outputed map of outnum->HTLC (NULL for direct outputs), or NULL.
* @obscured_commitment_number: number to encode in commitment transaction
* @side: side to generate commitment transaction for.
*
* We need to be able to generate the remote side's tx to create signatures,
* but the BOLT is expressed in terms of generating our local commitment
* transaction, so we carefully use the terms "self" and "other" here.
*/
struct bitcoin_tx *commit_tx(const tal_t *ctx,
const struct sha256_double *funding_txid,
unsigned int funding_txout,
u64 funding_satoshis,
enum side funder,
u16 to_self_delay,
const struct pubkey *revocation_pubkey,
const struct pubkey *self_delayedkey,
const struct pubkey *selfkey,
const struct pubkey *otherkey,
u64 feerate_per_kw,
u64 dust_limit_satoshis,
u64 self_pay_msat,
u64 other_pay_msat,
const struct htlc **htlcs,
const struct htlc ***htlcmap,
u64 obscured_commitment_number,
enum side side);
#endif /* LIGHTNING_LIGHTNINGD_COMMIT_TX_H */