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#include <ccan/ccan/tal/str/str.h>
#include <common/json_command.h>
#include <common/jsonrpc_errors.h>
#include <connectd/connectd_wiregen.h>
#include <lightningd/channel.h>
#include <lightningd/log.h>
#include <lightningd/notification.h>
#include <lightningd/opening_common.h>
#include <lightningd/peer_control.h>
#include <lightningd/subd.h>
#include <openingd/dualopend_wiregen.h>
#include <openingd/openingd_wiregen.h>
#include <wallet/wallet.h>
static void destroy_uncommitted_channel(struct uncommitted_channel *uc)
{
if (uc->open_daemon) {
struct subd *open_daemon= uc->open_daemon;
uc->open_daemon = NULL;
subd_release_channel(open_daemon, uc);
}
/* This is how shutdown_subdaemons tells us not to delete from db! */
if (!uc->peer->uncommitted_channel)
return;
uc->peer->uncommitted_channel = NULL;
maybe_delete_peer(uc->peer);
}
struct uncommitted_channel *
new_uncommitted_channel(struct peer *peer)
{
struct lightningd *ld = peer->ld;
struct uncommitted_channel *uc = tal(ld, struct uncommitted_channel);
uc->peer = peer;
assert(!peer->uncommitted_channel);
uc->transient_billboard = NULL;
uc->dbid = wallet_get_channel_dbid(ld->wallet);
uc->log = new_log(uc, ld->log_book, &uc->peer->id,
"chan#%"PRIu64, uc->dbid);
uc->fc = NULL;
uc->our_config.id = 0;
memset(&uc->cid, 0xFF, sizeof(uc->cid));
get_channel_basepoints(ld, &uc->peer->id, uc->dbid,
&uc->local_basepoints, &uc->local_funding_pubkey);
uc->peer->uncommitted_channel = uc;
tal_add_destructor(uc, destroy_uncommitted_channel);
uc->got_offer = false;
return uc;
}
void opend_channel_errmsg(struct uncommitted_channel *uc,
struct per_peer_state *pps,
const struct channel_id *channel_id UNUSED,
const char *desc,
bool soft_error UNUSED,
const u8 *err_for_them UNUSED)
{
/* Close fds, if any. */
tal_free(pps);
uncommitted_channel_disconnect(uc, LOG_INFORM, desc);
tal_free(uc);
}
/* There's nothing permanent in an unconfirmed transaction */
void opend_channel_set_billboard(struct uncommitted_channel *uc,
bool perm UNUSED,
const char *happenings TAKES)
{
uc->transient_billboard = tal_free(uc->transient_billboard);
if (happenings)
uc->transient_billboard = tal_strdup(uc, happenings);
}
void uncommitted_channel_disconnect(struct uncommitted_channel *uc,
enum log_level level,
const char *desc)
{
u8 *msg = towire_connectd_peer_disconnected(tmpctx, &uc->peer->id);
log_(uc->log, level, NULL, false, "%s", desc);
subd_send_msg(uc->peer->ld->connectd, msg);
if (uc->fc && uc->fc->cmd)
was_pending(command_fail(uc->fc->cmd, LIGHTNINGD, "%s", desc));
notify_disconnect(uc->peer->ld, &uc->peer->id);
}
void kill_uncommitted_channel(struct uncommitted_channel *uc,
const char *why)
{
log_info(uc->log, "Killing opening daemon: %s", why);
/* Close opend daemon. */
subd_release_channel(uc->open_daemon, uc);
uc->open_daemon = NULL;
uncommitted_channel_disconnect(uc, LOG_INFORM, why);
tal_free(uc);
}
void channel_config(struct lightningd *ld,
struct channel_config *ours,
u32 *max_to_self_delay,
struct amount_msat *min_effective_htlc_capacity)
{
/* FIXME: depend on feerate. */
*max_to_self_delay = ld->config.locktime_max;
/* Take minimal effective capacity from config min_capacity_sat */
if (!amount_sat_to_msat(min_effective_htlc_capacity,
amount_sat(ld->config.min_capacity_sat)))
fatal("amount_msat overflow for config.min_capacity_sat");
/* BOLT #2:
*
* The sending node SHOULD:
*...
* - set `dust_limit_satoshis` to a sufficient value to allow
* commitment transactions to propagate through the Bitcoin network.
*/
ours->dust_limit = chainparams->dust_limit;
ours->max_htlc_value_in_flight = AMOUNT_MSAT(UINT64_MAX);
/* Don't care */
ours->htlc_minimum = AMOUNT_MSAT(0);
/* BOLT #2:
*
* The sending node SHOULD:
* - set `to_self_delay` sufficient to ensure the sender can
* irreversibly spend a commitment transaction output, in case of
* misbehavior by the receiver.
*/
ours->to_self_delay = ld->config.locktime_blocks;
ours->max_accepted_htlcs = ld->config.max_concurrent_htlcs;
/* This is filled in by lightning_openingd, for consistency. */
ours->channel_reserve = AMOUNT_SAT(UINT64_MAX);
}
#if DEVELOPER
/* Indented to avoid include ordering check */
#include <lightningd/memdump.h>
static void opening_died_forget_memleak(struct subd *open_daemon,
struct command *cmd)
{
/* FIXME: We ignore the remaining opening daemons in this case. */
opening_memleak_done(cmd, NULL);
}
/* Mutual recursion */
static void opening_memleak_req_next(struct command *cmd, struct peer *prev);
static void opening_memleak_req_done(struct subd *open_daemon,
const u8 *msg, const int *fds UNUSED,
struct command *cmd)
{
bool found_leak;
struct uncommitted_channel *uc = open_daemon->channel;
tal_del_destructor2(open_daemon, opening_died_forget_memleak, cmd);
if (!fromwire_openingd_dev_memleak_reply(msg, &found_leak) &&
!fromwire_dualopend_dev_memleak_reply(msg,
&found_leak)) {
was_pending(command_fail(cmd, LIGHTNINGD,
"Bad opening_dev_memleak"));
return;
}
if (found_leak) {
opening_memleak_done(cmd, open_daemon);
return;
}
opening_memleak_req_next(cmd, uc->peer);
}
static void opening_memleak_req_next(struct command *cmd, struct peer *prev)
{
struct peer *p;
u8 *msg;
list_for_each(&cmd->ld->peers, p, list) {
struct subd *open_daemon;
if (!p->uncommitted_channel)
continue;
if (p == prev) {
prev = NULL;
continue;
}
if (prev != NULL)
continue;
open_daemon = p->uncommitted_channel->open_daemon;
if (!open_daemon)
continue;
if (streq(open_daemon->name, "dualopend"))
msg = towire_dualopend_dev_memleak(NULL);
else
msg = towire_openingd_dev_memleak(NULL);
subd_req(p, open_daemon, take(msg), -1, 0,
opening_memleak_req_done, cmd);
/* Just in case it dies before replying! */
tal_add_destructor2(p->uncommitted_channel->open_daemon,
opening_died_forget_memleak, cmd);
return;
}
opening_memleak_done(cmd, NULL);
}
void opening_dev_memleak(struct command *cmd)
{
opening_memleak_req_next(cmd, NULL);
}
#endif /* DEVELOPER */