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peer_control.c
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#include "lightningd.h"
#include "peer_control.h"
#include "subd.h"
#include <arpa/inet.h>
#include <bitcoin/script.h>
#include <bitcoin/tx.h>
#include <ccan/fdpass/fdpass.h>
#include <ccan/io/io.h>
#include <ccan/noerr/noerr.h>
#include <ccan/str/str.h>
#include <ccan/take/take.h>
#include <ccan/tal/str/str.h>
#include <channeld/gen_channel_wire.h>
#include <closingd/gen_closing_wire.h>
#include <common/close_tx.h>
#include <common/dev_disconnect.h>
#include <common/features.h>
#include <common/funding_tx.h>
#include <common/initial_commit_tx.h>
#include <common/key_derive.h>
#include <common/status.h>
#include <common/timeout.h>
#include <common/wire_error.h>
#include <errno.h>
#include <fcntl.h>
#include <gossipd/gen_gossip_wire.h>
#include <hsmd/capabilities.h>
#include <hsmd/gen_hsm_client_wire.h>
#include <inttypes.h>
#include <lightningd/build_utxos.h>
#include <lightningd/chaintopology.h>
#include <lightningd/gen_peer_state_names.h>
#include <lightningd/hsm_control.h>
#include <lightningd/jsonrpc.h>
#include <lightningd/log.h>
#include <lightningd/netaddress.h>
#include <lightningd/options.h>
#include <lightningd/peer_htlcs.h>
#include <onchaind/gen_onchain_wire.h>
#include <onchaind/onchain_wire.h>
#include <openingd/gen_opening_wire.h>
#include <unistd.h>
#include <wally_bip32.h>
#include <wire/gen_onion_wire.h>
#include <wire/peer_wire.h>
#include <wire/wire_sync.h>
struct connect {
struct list_node list;
struct pubkey id;
struct command *cmd;
};
/* FIXME: Reorder */
struct funding_channel;
static void peer_offer_channel(struct lightningd *ld,
struct funding_channel *fc,
const struct wireaddr *addr,
const struct crypto_state *cs,
u64 gossip_index,
const u8 *gfeatures, const u8 *lfeatures,
int peer_fd, int gossip_fd);
static bool peer_start_channeld(struct peer *peer,
const struct crypto_state *cs,
u64 gossip_index,
int peer_fd, int gossip_fd,
const u8 *funding_signed,
bool reconnected);
static void peer_start_closingd(struct peer *peer,
struct crypto_state *cs,
u64 gossip_index,
int peer_fd, int gossip_fd,
bool reconnected);
static void peer_accept_channel(struct lightningd *ld,
const struct pubkey *peer_id,
const struct wireaddr *addr,
const struct crypto_state *cs,
u64 gossip_index,
const u8 *gfeatures, const u8 *lfeatures,
int peer_fd, int gossip_fd,
const u8 *open_msg);
static void peer_set_owner(struct peer *peer, struct subd *owner)
{
struct subd *old_owner = peer->owner;
peer->owner = owner;
if (old_owner)
subd_release_peer(old_owner, peer);
}
static void destroy_peer(struct peer *peer)
{
/* Must not have any HTLCs! */
struct htlc_out_map_iter outi;
struct htlc_out *hout;
struct htlc_in_map_iter ini;
struct htlc_in *hin;
for (hout = htlc_out_map_first(&peer->ld->htlcs_out, &outi);
hout;
hout = htlc_out_map_next(&peer->ld->htlcs_out, &outi)) {
if (hout->key.peer != peer)
continue;
fatal("Freeing peer %s has hout %s",
peer_state_name(peer->state),
htlc_state_name(hout->hstate));
}
for (hin = htlc_in_map_first(&peer->ld->htlcs_in, &ini);
hin;
hin = htlc_in_map_next(&peer->ld->htlcs_in, &ini)) {
if (hin->key.peer != peer)
continue;
fatal("Freeing peer %s has hin %s",
peer_state_name(peer->state),
htlc_state_name(hin->hstate));
}
/* Free any old owner still hanging around. */
peer_set_owner(peer, NULL);
list_del_from(&peer->ld->peers, &peer->list);
}
static void sign_last_tx(struct peer *peer)
{
const tal_t *tmpctx = tal_tmpctx(peer);
u8 *funding_wscript;
struct pubkey local_funding_pubkey;
struct secrets secrets;
secp256k1_ecdsa_signature sig;
assert(!peer->last_tx->input[0].witness);
derive_basepoints(peer->seed, &local_funding_pubkey, NULL, &secrets,
NULL);
funding_wscript = bitcoin_redeem_2of2(tmpctx,
&local_funding_pubkey,
&peer->channel_info->remote_fundingkey);
/* Need input amount for signing */
peer->last_tx->input[0].amount = tal_dup(peer->last_tx->input, u64,
&peer->funding_satoshi);
sign_tx_input(peer->last_tx, 0, NULL, funding_wscript,
&secrets.funding_privkey,
&local_funding_pubkey,
&sig);
peer->last_tx->input[0].witness
= bitcoin_witness_2of2(peer->last_tx->input,
peer->last_sig,
&sig,
&peer->channel_info->remote_fundingkey,
&local_funding_pubkey);
tal_free(tmpctx);
}
static void remove_sig(struct bitcoin_tx *signed_tx)
{
signed_tx->input[0].amount = tal_free(signed_tx->input[0].amount);
signed_tx->input[0].witness = tal_free(signed_tx->input[0].witness);
}
static void drop_to_chain(struct peer *peer)
{
sign_last_tx(peer);
/* Keep broadcasting until we say stop (can fail due to dup,
* if they beat us to the broadcast). */
broadcast_tx(peer->ld->topology, peer, peer->last_tx, NULL);
remove_sig(peer->last_tx);
}
/* This lets us give a more detailed error than just a destructor. */
static void free_peer(struct peer *peer, const char *why)
{
if (peer->opening_cmd) {
command_fail(peer->opening_cmd, "%s", why);
peer->opening_cmd = NULL;
}
tal_free(peer);
}
void peer_fail_permanent(struct peer *peer, const char *fmt, ...)
{
va_list ap;
char *why;
va_start(ap, fmt);
why = tal_vfmt(peer, fmt, ap);
va_end(ap);
log_unusual(peer->log, "Peer permanent failure in %s: %s",
peer_state_name(peer->state), why);
/* We can have multiple errors, eg. onchaind failures. */
if (!peer->error) {
/* BOLT #1:
*
* The channel is referred to by `channel_id` unless `channel_id` is
* zero (ie. all bytes zero), in which case it refers to all
* channels. */
static const struct channel_id all_channels;
u8 *msg = tal_dup_arr(peer, u8, (const u8 *)why, strlen(why), 0);
peer->error = towire_error(peer, &all_channels, msg);
tal_free(msg);
}
peer_set_owner(peer, NULL);
if (peer_persists(peer)) {
drop_to_chain(peer);
tal_free(why);
} else
free_peer(peer, why);
}
void peer_internal_error(struct peer *peer, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
log_broken(peer->log, "Peer internal error %s: ",
peer_state_name(peer->state));
logv_add(peer->log, fmt, ap);
va_end(ap);
peer_fail_permanent(peer, "Internal error");
}
void peer_fail_transient(struct peer *peer, const char *fmt, ...)
{
va_list ap;
const char *why;
va_start(ap, fmt);
why = tal_vfmt(peer, fmt, ap);
va_end(ap);
log_info(peer->log, "Peer transient failure in %s: %s",
peer_state_name(peer->state), why);
#if DEVELOPER
if (dev_disconnect_permanent(peer->ld)) {
tal_free(why);
peer_internal_error(peer, "dev_disconnect permfail");
return;
}
#endif
peer_set_owner(peer, NULL);
/* If we haven't reached awaiting locked, we don't need to reconnect */
if (!peer_persists(peer)) {
log_info(peer->log, "Only reached state %s: forgetting",
peer_state_name(peer->state));
free_peer(peer, why);
return;
}
tal_free(why);
/* Reconnect unless we've dropped/are dropping to chain. */
if (!peer_on_chain(peer) && peer->state != CLOSINGD_COMPLETE) {
/* Don't schedule an attempt if we disabled reconnections with
* the `--no-reconnect` flag */
if (peer->ld->config.no_reconnect)
return;
u8 *msg = towire_gossipctl_reach_peer(peer, &peer->id);
subd_send_msg(peer->ld->gossip, take(msg));
}
}
void peer_set_condition(struct peer *peer, enum peer_state old_state,
enum peer_state state)
{
log_info(peer->log, "state: %s -> %s",
peer_state_name(peer->state), peer_state_name(state));
if (peer->state != old_state)
fatal("peer state %s should be %s",
peer_state_name(peer->state), peer_state_name(old_state));
peer->state = state;
/* We only persist channels/peers that have reached the opening state */
if (peer_persists(peer)) {
assert(peer->channel != NULL);
/* TODO(cdecker) Selectively save updated fields to DB */
wallet_channel_save(peer->ld->wallet, peer->channel, 0);
}
}
static void destroy_connect(struct connect *c)
{
list_del(&c->list);
}
static struct connect *new_connect(struct lightningd *ld,
const struct pubkey *id,
struct command *cmd)
{
struct connect *c = tal(cmd, struct connect);
c->id = *id;
c->cmd = cmd;
list_add(&ld->connects, &c->list);
tal_add_destructor(c, destroy_connect);
return c;
}
static void connect_succeeded(struct lightningd *ld, const struct pubkey *id)
{
struct connect *i, *next;
/* Careful! Completing command frees connect. */
list_for_each_safe(&ld->connects, i, next, list) {
struct json_result *response;
if (!pubkey_eq(&i->id, id))
continue;
response = new_json_result(i->cmd);
json_object_start(response, NULL);
json_add_pubkey(response, "id", id);
json_object_end(response);
command_success(i->cmd, response);
}
}
static void connect_failed(struct lightningd *ld, const struct pubkey *id,
const char *error)
{
struct connect *i, *next;
/* Careful! Completing command frees connect. */
list_for_each_safe(&ld->connects, i, next, list) {
if (pubkey_eq(&i->id, id))
command_fail(i->cmd, "%s", error);
}
}
static struct peer *new_peer(struct lightningd *ld,
const struct pubkey *id,
const struct wireaddr *addr,
const u8 *gfeatures, const u8 *lfeatures,
int peer_fd)
{
struct peer *peer;
/* Need to memset since storing will access all fields */
peer = talz(ld, struct peer);
peer->error = NULL;
peer->id = *id;
peer->addr = *addr;
peer->funding_txid = NULL;
peer->remote_funding_locked = false;
peer->scid = NULL;
peer->seed = NULL;
peer->our_msatoshi = NULL;
peer->state = UNINITIALIZED;
peer->opening_cmd = NULL;
peer->channel_info = NULL;
peer->last_tx = NULL;
peer->last_sig = NULL;
peer->last_htlc_sigs = NULL;
peer->last_was_revoke = false;
peer->last_sent_commit = NULL;
peer->remote_shutdown_scriptpubkey = NULL;
peer->local_shutdown_idx = -1;
peer->next_index[LOCAL]
= peer->next_index[REMOTE] = 0;
peer->next_htlc_id = 0;
wallet_shachain_init(ld->wallet, &peer->their_shachain);
/* FIXME: db should be keyed by (peer_id, channel_id) */
/* If we have the peer in the DB, this'll populate the fields,
* failure just indicates that the peer wasn't found in the
* DB */
wallet_peer_by_nodeid(ld->wallet, id, peer);
/* peer->channel gets populated as soon as we start opening a channel */
peer->channel = NULL;
list_add_tail(&ld->peers, &peer->list);
populate_peer(ld, peer);
return peer;
}
/**
* peer_channel_new -- Instantiate a new channel for the given peer and save it
*
* We are about to open a channel with the peer, either due to a
* nongossip message from remote, or because we initiated an
* open. This creates the `struct wallet_channel` for the peer and
* stores it in the database.
*
* @w: the wallet to store the information in
* @peer: the peer we are opening a channel to
*
* This currently overwrites peer->channel, so can only be used if we
* allow a single channel per peer.
*/
static struct wallet_channel *peer_channel_new(struct wallet *w,
struct peer *peer)
{
struct wallet_channel *wc = tal(peer, struct wallet_channel);
wc->peer = peer;
wallet_peer_by_nodeid(w, &peer->id, peer);
wc->id = 0;
wallet_channel_save(w, wc, get_block_height(peer->ld->topology));
return wc;
}
static void channel_config(struct lightningd *ld,
struct channel_config *ours,
u32 *max_to_self_delay,
u32 *max_minimum_depth,
u64 *min_effective_htlc_capacity_msat)
{
/* FIXME: depend on feerate. */
*max_to_self_delay = ld->config.locktime_max;
*max_minimum_depth = ld->config.anchor_confirms_max;
/* This is 1c at $1000/BTC */
*min_effective_htlc_capacity_msat = 1000000;
/* BOLT #2:
*
* The sender SHOULD set `dust_limit_satoshis` to a sufficient
* value to allow commitment transactions to propagate through
* the Bitcoin network.
*/
ours->dust_limit_satoshis = 546;
ours->max_htlc_value_in_flight_msat = UINT64_MAX;
/* Don't care */
ours->htlc_minimum_msat = 0;
/* BOLT #2:
*
* The sender 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;
/* BOLT #2:
*
* It MUST fail the channel if `max_accepted_htlcs` is greater than
* 483.
*/
ours->max_accepted_htlcs = 483;
/* This is filled in by lightning_openingd, for consistency. */
ours->channel_reserve_satoshis = 0;
};
/* Gossipd tells us a peer has connected */
void peer_connected(struct lightningd *ld, const u8 *msg,
int peer_fd, int gossip_fd)
{
struct pubkey id;
struct crypto_state cs;
u8 *gfeatures, *lfeatures;
u8 *error;
u8 *supported_global_features;
u8 *supported_local_features;
struct peer *peer;
struct wireaddr addr;
u64 gossip_index;
if (!fromwire_gossip_peer_connected(msg, msg, NULL,
&id, &addr, &cs, &gossip_index,
&gfeatures, &lfeatures))
fatal("Gossip gave bad GOSSIP_PEER_CONNECTED message %s",
tal_hex(msg, msg));
if (unsupported_features(gfeatures, lfeatures)) {
log_unusual(ld->log, "peer %s offers unsupported features %s/%s",
type_to_string(msg, struct pubkey, &id),
tal_hex(msg, gfeatures),
tal_hex(msg, lfeatures));
supported_global_features = get_supported_global_features(msg);
supported_local_features = get_supported_local_features(msg);
error = towire_errorfmt(msg, NULL,
"We only support globalfeatures %s"
" and localfeatures %s",
tal_hexstr(msg,
supported_global_features,
tal_len(supported_global_features)),
tal_hexstr(msg,
supported_local_features,
tal_len(supported_local_features)));
goto send_error;
}
/* Now, do we already know this peer? */
peer = peer_by_id(ld, &id);
if (peer) {
log_debug(peer->log, "Peer has reconnected, state %s",
peer_state_name(peer->state));
/* FIXME: We can have errors for multiple channels. */
if (peer->error) {
error = peer->error;
goto send_error;
}
#if DEVELOPER
if (dev_disconnect_permanent(ld)) {
peer_internal_error(peer, "dev_disconnect permfail");
error = peer->error;
goto send_error;
}
#endif
switch (peer->state) {
/* This can't happen. */
case UNINITIALIZED:
abort();
/* Reconnect: discard old one. */
case OPENINGD:
free_peer(peer, "peer reconnected");
peer = NULL;
goto return_to_gossipd;
case ONCHAIND_CHEATED:
case ONCHAIND_THEIR_UNILATERAL:
case ONCHAIND_OUR_UNILATERAL:
case FUNDING_SPEND_SEEN:
case ONCHAIND_MUTUAL:
/* If they try to reestablish channel, we'll send
* error then */
goto return_to_gossipd;
case CHANNELD_AWAITING_LOCKIN:
case CHANNELD_NORMAL:
case CHANNELD_SHUTTING_DOWN:
/* Stop any existing daemon, without triggering error
* on this peer. */
peer_set_owner(peer, NULL);
peer->addr = addr;
peer_start_channeld(peer, &cs, gossip_index,
peer_fd, gossip_fd, NULL,
true);
return;
case CLOSINGD_SIGEXCHANGE:
case CLOSINGD_COMPLETE:
/* Stop any existing daemon, without triggering error
* on this peer. */
peer_set_owner(peer, NULL);
peer->addr = addr;
peer_start_closingd(peer, &cs, gossip_index,
peer_fd, gossip_fd,
true);
return;
}
abort();
}
return_to_gossipd:
/* Otherwise, we hand back to gossipd, to continue. */
msg = towire_gossipctl_hand_back_peer(msg, &id, &cs, gossip_index, NULL);
subd_send_msg(ld->gossip, take(msg));
subd_send_fd(ld->gossip, peer_fd);
subd_send_fd(ld->gossip, gossip_fd);
/* If we were waiting for connection, we succeeded. */
connect_succeeded(ld, &id);
return;
send_error:
/* Hand back to gossipd, with an error packet. */
connect_failed(ld, &id, sanitize_error(msg, error, NULL));
msg = towire_gossipctl_hand_back_peer(msg, &id, &cs, gossip_index,
error);
subd_send_msg(ld->gossip, take(msg));
subd_send_fd(ld->gossip, peer_fd);
subd_send_fd(ld->gossip, gossip_fd);
}
/* Gossipd tells us peer was already connected. */
void peer_already_connected(struct lightningd *ld, const u8 *msg)
{
struct pubkey id;
if (!fromwire_gossip_peer_already_connected(msg, NULL, &id))
fatal("Gossip gave bad GOSSIP_PEER_ALREADY_CONNECTED message %s",
tal_hex(msg, msg));
/* If we were waiting for connection, we succeeded. */
connect_succeeded(ld, &id);
}
void peer_sent_nongossip(struct lightningd *ld,
const struct pubkey *id,
const struct wireaddr *addr,
const struct crypto_state *cs,
u64 gossip_index,
const u8 *gfeatures,
const u8 *lfeatures,
int peer_fd, int gossip_fd,
const u8 *in_msg)
{
struct channel_id *channel_id, extracted_channel_id;
struct peer *peer;
u8 *error, *msg;
if (!extract_channel_id(in_msg, &extracted_channel_id))
channel_id = NULL;
else
channel_id = &extracted_channel_id;
/* FIXME: match state too; we can have multiple onchain
* (ie. dead) channels for the same peer. */
peer = peer_by_id(ld, id);
if (peer) {
error = towire_errorfmt(ld, channel_id,
"Unexpected message %i in state %s",
fromwire_peektype(in_msg),
peer_state_name(peer->state));
goto send_error;
}
/* Open request? */
if (fromwire_peektype(in_msg) == WIRE_OPEN_CHANNEL) {
peer_accept_channel(ld, id, addr, cs, gossip_index,
gfeatures, lfeatures,
peer_fd, gossip_fd, in_msg);
return;
}
/* Weird request. */
error = towire_errorfmt(ld, channel_id,
"Unexpected message %i for unknown peer",
fromwire_peektype(in_msg));
send_error:
/* Hand back to gossipd, with an error packet. */
connect_failed(ld, id, sanitize_error(error, error, NULL));
msg = towire_gossipctl_hand_back_peer(ld, id, cs, gossip_index, error);
subd_send_msg(ld->gossip, take(msg));
subd_send_fd(ld->gossip, peer_fd);
subd_send_fd(ld->gossip, gossip_fd);
tal_free(error);
}
/* We copy per-peer entries above --log-level into the main log. */
static void copy_to_parent_log(const char *prefix,
enum log_level level,
bool continued,
const char *str,
struct peer *peer)
{
const char *idstr = type_to_string(peer, struct pubkey, &peer->id);
if (continued)
log_add(peer->ld->log, "peer %s: ... %s", idstr, str);
else
log_(peer->ld->log, level, "peer %s: %s", idstr, str);
tal_free(idstr);
}
void populate_peer(struct lightningd *ld, struct peer *peer)
{
const char *idname;
struct pubkey *id = &peer->id;
idname = type_to_string(peer, struct pubkey, id);
peer->ld = ld;
/* Max 128k per peer. */
peer->log_book = new_log_book(peer, 128*1024,
get_log_level(ld->log_book));
peer->log = new_log(peer, peer->log_book, "peer %s:", idname);
set_log_outfn(peer->log_book, copy_to_parent_log, peer);
tal_free(idname);
tal_add_destructor(peer, destroy_peer);
}
struct peer *peer_by_id(struct lightningd *ld, const struct pubkey *id)
{
struct peer *p;
list_for_each(&ld->peers, p, list)
if (pubkey_eq(&p->id, id))
return p;
return NULL;
}
static void json_connect(struct command *cmd,
const char *buffer, const jsmntok_t *params)
{
jsmntok_t *hosttok, *porttok, *idtok;
struct pubkey id;
const char *name;
struct wireaddr addr;
u8 *msg;
if (!json_get_params(buffer, params,
"id", &idtok,
"?host", &hosttok,
"?port", &porttok,
NULL)) {
command_fail(cmd, "Need id to connect");
return;
}
if (!json_tok_pubkey(buffer, idtok, &id)) {
command_fail(cmd, "id %.*s not valid",
idtok->end - idtok->start,
buffer + idtok->start);
return;
}
if (porttok && !hosttok) {
command_fail(cmd, "Can't specify port without host");
return;
}
if (hosttok) {
name = tal_strndup(cmd, buffer + hosttok->start,
hosttok->end - hosttok->start);
if (porttok) {
u32 port;
if (!json_tok_number(buffer, porttok, &port)) {
command_fail(cmd, "port %.*s not valid",
porttok->end - porttok->start,
buffer + porttok->start);
return;
}
addr.port = port;
} else {
addr.port = DEFAULT_PORT;
}
if (!parse_wireaddr(name, &addr, addr.port) || !addr.port) {
command_fail(cmd, "host %s:%u not valid",
name, addr.port);
return;
}
/* Tell it about the address. */
msg = towire_gossipctl_peer_addrhint(cmd, &id, &addr);
subd_send_msg(cmd->ld->gossip, take(msg));
}
/* Now tell it to try reaching it. */
msg = towire_gossipctl_reach_peer(cmd, &id);
subd_send_msg(cmd->ld->gossip, take(msg));
/* Leave this here for gossip_peer_connected */
new_connect(cmd->ld, &id, cmd);
command_still_pending(cmd);
}
static const struct json_command connect_command = {
"connect",
json_connect,
"Connect to {id} at {host} (which can end in ':port' if not default)",
"Returns the {id} on success (once channel established)"
};
AUTODATA(json_command, &connect_command);
struct log_info {
enum log_level level;
struct json_result *response;
};
/* FIXME: Share this with jsonrpc.c's code! */
static void log_to_json(unsigned int skipped,
struct timerel diff,
enum log_level level,
const char *prefix,
const char *log,
struct log_info *info)
{
if (level < info->level)
return;
if (level != LOG_IO)
json_add_string(info->response, NULL, log);
}
struct getpeers_args {
struct command *cmd;
/* If non-NULL, they want logs too */
enum log_level *ll;
/* If set, only report on a specific id. */
struct pubkey *specific_id;
};
static void gossipd_getpeers_complete(struct subd *gossip, const u8 *msg,
const int *fds,
struct getpeers_args *gpa)
{
/* This is a little sneaky... */
struct pubkey *ids;
struct wireaddr *addrs;
struct json_result *response = new_json_result(gpa->cmd);
struct peer *p;
if (!fromwire_gossip_getpeers_reply(msg, msg, NULL, &ids, &addrs)) {
command_fail(gpa->cmd, "Bad response from gossipd");
return;
}
/* First the peers not just gossiping. */
json_object_start(response, NULL);
json_array_start(response, "peers");
list_for_each(&gpa->cmd->ld->peers, p, list) {
bool connected;
if (gpa->specific_id && !pubkey_eq(gpa->specific_id, &p->id))
continue;
json_object_start(response, NULL);
json_add_pubkey(response, "id", &p->id);
connected = (p->owner != NULL && !peer_state_on_chain(p->state));
json_add_bool(response, "connected", connected);
if (connected) {
json_array_start(response, "netaddr");
if (p->addr.type != ADDR_TYPE_PADDING)
json_add_string(response, NULL,
type_to_string(response,
struct wireaddr,
&p->addr));
json_array_end(response);
}
/* FIXME: We only support one channel per peer, but API must
* support multiple already! */
json_array_start(response, "channels");
json_object_start(response, NULL);
json_add_string(response, "state", peer_state_name(p->state));
if (p->owner)
json_add_string(response, "owner", p->owner->name);
if (p->scid)
json_add_short_channel_id(response,
"short_channel_id", p->scid);
if (p->funding_txid)
json_add_txid(response,
"funding_txid", p->funding_txid);
if (p->our_msatoshi) {
json_add_u64(response, "msatoshi_to_us",
*p->our_msatoshi);
json_add_u64(response, "msatoshi_total",
p->funding_satoshi * 1000);
}
json_object_end(response);
json_array_end(response);
if (gpa->ll) {
struct log_info info;
info.level = *gpa->ll;
info.response = response;
json_array_start(response, "log");
log_each_line(p->log_book, log_to_json, &info);
json_array_end(response);
}
json_object_end(response);
}
for (size_t i = 0; i < tal_count(ids); i++) {
/* Don't report peers in both, which can happen if they're
* reconnecting */
if (peer_by_id(gpa->cmd->ld, ids + i))
continue;
json_object_start(response, NULL);
/* Fake state. */
json_add_string(response, "state", "GOSSIPING");
json_add_pubkey(response, "id", ids+i);
json_array_start(response, "netaddr");
if (addrs[i].type != ADDR_TYPE_PADDING)
json_add_string(response, NULL,
type_to_string(response, struct wireaddr,
addrs + i));
json_array_end(response);
json_add_bool(response, "connected", true);
json_add_string(response, "owner", gossip->name);
json_object_end(response);
}
json_array_end(response);
json_object_end(response);
command_success(gpa->cmd, response);
}
static void json_listpeers(struct command *cmd,
const char *buffer, const jsmntok_t *params)
{
jsmntok_t *leveltok;
struct getpeers_args *gpa = tal(cmd, struct getpeers_args);
jsmntok_t *idtok;
gpa->cmd = cmd;
gpa->specific_id = NULL;
if (!json_get_params(buffer, params,
"?id", &idtok,
"?level", &leveltok,
NULL)) {
command_fail(cmd, "Invalid arguments");
return;
}
if (idtok) {
gpa->specific_id = tal_arr(cmd, struct pubkey, 1);
if (!json_tok_pubkey(buffer, idtok, gpa->specific_id)) {
command_fail(cmd, "id %.*s not valid",
idtok->end - idtok->start,
buffer + idtok->start);
return;
}
}
if (leveltok) {
gpa->ll = tal(gpa, enum log_level);
if (json_tok_streq(buffer, leveltok, "debug"))
*gpa->ll = LOG_DBG;
else if (json_tok_streq(buffer, leveltok, "info"))
*gpa->ll = LOG_INFORM;
else if (json_tok_streq(buffer, leveltok, "unusual"))
*gpa->ll = LOG_UNUSUAL;
else if (json_tok_streq(buffer, leveltok, "broken"))
*gpa->ll = LOG_BROKEN;
else {
command_fail(cmd, "Invalid level param");
return;
}
} else
gpa->ll = NULL;
/* Get peers from gossipd. */
subd_req(cmd, cmd->ld->gossip,
take(towire_gossip_getpeers_request(cmd, gpa->specific_id)),
-1, 0, gossipd_getpeers_complete, gpa);
command_still_pending(cmd);
}
static const struct json_command listpeers_command = {
"listpeers",
json_listpeers,
"List the current peers, if {level} is set, include {log}s",
"Returns a 'peers' array"
};
AUTODATA(json_command, &listpeers_command);
struct peer *peer_from_json(struct lightningd *ld,
const char *buffer,
jsmntok_t *peeridtok)
{
struct pubkey peerid;
if (!json_tok_pubkey(buffer, peeridtok, &peerid))
return NULL;
return peer_by_id(ld, &peerid);
}
struct funding_channel {
struct command *cmd; /* Which also owns us. */
/* Peer we're trying to reach. */
struct pubkey peerid;
/* Details of how to make funding. */
const struct utxo **utxomap;
u64 change;
u32 change_keyindex;
u64 funding_satoshi, push_msat;
/* Peer, once we have one. */
struct peer *peer;
};
static void funding_broadcast_failed(struct peer *peer,
int exitstatus, const char *err)
{
peer_internal_error(peer, "Funding broadcast exited with %i: %s",
exitstatus, err);
}
static enum watch_result funding_announce_cb(struct peer *peer,
const struct bitcoin_tx *tx,
unsigned int depth,
void *unused)
{
if (depth < ANNOUNCE_MIN_DEPTH) {
return KEEP_WATCHING;
}
if (!peer->owner || !streq(peer->owner->name, "lightning_channeld")) {
log_debug(peer->ld->log,
"Funding tx announce ready, but peer is not owned by channeld");
return KEEP_WATCHING;