mirror of
https://github.com/ElementsProject/lightning.git
synced 2024-11-20 02:27:51 +01:00
22858f35f9
This simplifies lifetime assumptions. Currently all callers keep the original around, but everything broke when I changed that in the next patch. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
131 lines
4.0 KiB
C
131 lines
4.0 KiB
C
#include <assert.h>
|
|
#include <bitcoin/chainparams.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_blkid *chain_hash,
|
|
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);
|
|
channel->chainparams = chainparams_by_chainhash(chain_hash);
|
|
if (channel->chainparams == NULL)
|
|
return tal_free(channel);
|
|
|
|
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],
|
|
&channel->basepoints[!side],
|
|
&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,
|
|
/* They specify our to_self_delay and v.v. */
|
|
channel->config[!side].to_self_delay,
|
|
&keyset,
|
|
channel->view[side].feerate_per_kw,
|
|
channel->config[side].dust_limit_satoshis,
|
|
channel->view[side].owed_msat[side],
|
|
channel->view[side].owed_msat[!side],
|
|
channel_reserve_msat(channel, 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);
|