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