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#include <assert.h>
#include <bitcoin/script.h>
#include <ccan/tal/str/str.h>
#include <common/initial_channel.h>
#include <common/initial_commit_tx.h>
#include <common/keyset.h>
#include <common/type_to_string.h>
#include <inttypes.h>
struct channel *new_initial_channel(const tal_t *ctx,
const struct bitcoin_txid *funding_txid,
unsigned int funding_txout,
u64 funding_satoshis,
u64 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)
{
struct channel *channel = tal(ctx, struct channel);
channel->funding_txid = *funding_txid;
channel->funding_txout = funding_txout;
if (funding_satoshis > UINT64_MAX / 1000)
return tal_free(channel);
channel->funding_msat = funding_satoshis * 1000;
if (local_msatoshi > channel->funding_msat)
return tal_free(channel);
channel->funder = funder;
channel->config[LOCAL] = local;
channel->config[REMOTE] = remote;
channel->funding_pubkey[LOCAL] = *local_funding_pubkey;
channel->funding_pubkey[REMOTE] = *remote_funding_pubkey;
channel->htlcs = NULL;
channel->changes_pending[LOCAL] = channel->changes_pending[REMOTE]
= false;
channel->view[LOCAL].feerate_per_kw
= channel->view[REMOTE].feerate_per_kw
= feerate_per_kw;
channel->view[LOCAL].owed_msat[LOCAL]
= channel->view[REMOTE].owed_msat[LOCAL]
= local_msatoshi;
channel->view[REMOTE].owed_msat[REMOTE]
= channel->view[LOCAL].owed_msat[REMOTE]
= channel->funding_msat - local_msatoshi;
channel->basepoints[LOCAL] = *local_basepoints;
channel->basepoints[REMOTE] = *remote_basepoints;
channel->commitment_number_obscurer
= commit_number_obscurer(&channel->basepoints[funder].payment,
&channel->basepoints[!funder].payment);
return channel;
}
/* FIXME: We could cache this. */
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)
{
struct keyset keyset;
/* This assumes no HTLCs! */
assert(!channel->htlcs);
if (!derive_keyset(per_commitment_point,
&channel->basepoints[side].payment,
&channel->basepoints[!side].payment,
&channel->basepoints[side].htlc,
&channel->basepoints[!side].htlc,
&channel->basepoints[side].delayed_payment,
&channel->basepoints[!side].revocation,
&keyset))
return NULL;
*wscript = bitcoin_redeem_2of2(ctx,
&channel->funding_pubkey[side],
&channel->funding_pubkey[!side]);
return initial_commit_tx(ctx, &channel->funding_txid,
channel->funding_txout,
channel->funding_msat / 1000,
channel->funder,
to_self_delay(channel, side),
&keyset,
channel->view[side].feerate_per_kw,
dust_limit_satoshis(channel, side),
channel->view[side].owed_msat[side],
channel->view[side].owed_msat[!side],
0 ^ channel->commitment_number_obscurer,
side);
}
static char *fmt_channel_view(const tal_t *ctx, const struct channel_view *view)
{
return tal_fmt(ctx, "{ feerate_per_kw=%"PRIu32","
" owed_local=%"PRIu64","
" owed_remote=%"PRIu64" }",
view->feerate_per_kw,
view->owed_msat[LOCAL],
view->owed_msat[REMOTE]);
}
/* FIXME: This should reference HTLCs somehow. */
static char *fmt_channel(const tal_t *ctx, const struct channel *channel)
{
return tal_fmt(ctx, "{ funding_msat=%"PRIu64","
" funder=%s,"
" local=%s,"
" remote=%s }",
channel->funding_msat,
side_to_str(channel->funder),
fmt_channel_view(ctx, &channel->view[LOCAL]),
fmt_channel_view(ctx, &channel->view[REMOTE]));
}
REGISTER_TYPE_TO_STRING(channel, fmt_channel);