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cf2ebed567
core-lightning/lightningd/peer_control.c
Rusty Russell cf2ebed567 lightningd: close channel ourselves, if we receive an error. 
Previously, we would forward the message to a subd, but now we have
the case where the subd is gone, but we're still connected.  If the
peer anything but a reestablish in that state, we drop the connection.

Instead, an error should always make us fail the channel.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2023-10-23 15:48:50 +10:30

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#include "config.h"
#include <arpa/inet.h>
#include <bitcoin/feerate.h>
#include <bitcoin/script.h>
#include <bitcoin/tx.h>
#include <ccan/array_size/array_size.h>
#include <ccan/cast/cast.h>
#include <ccan/io/io.h>
#include <ccan/mem/mem.h>
#include <ccan/noerr/noerr.h>
#include <ccan/str/str.h>
#include <ccan/take/take.h>
#include <ccan/tal/str/str.h>
#include <channeld/channeld_wiregen.h>
#include <common/addr.h>
#include <common/closing_fee.h>
#include <common/configdir.h>
#include <common/dev_disconnect.h>
#include <common/features.h>
#include <common/htlc_trim.h>
#include <common/initial_commit_tx.h>
#include <common/json_command.h>
#include <common/json_param.h>
#include <common/jsonrpc_errors.h>
#include <common/key_derive.h>
#include <common/scb_wiregen.h>
#include <common/shutdown_scriptpubkey.h>
#include <common/status.h>
#include <common/timeout.h>
#include <common/type_to_string.h>
#include <common/utils.h>
#include <common/version.h>
#include <common/wire_error.h>
#include <connectd/connectd_wiregen.h>
#include <errno.h>
#include <fcntl.h>
#include <gossipd/gossipd_wiregen.h>
#include <hsmd/hsmd_wiregen.h>
#include <inttypes.h>
#include <lightningd/anchorspend.h>
#include <lightningd/bitcoind.h>
#include <lightningd/chaintopology.h>
#include <lightningd/channel.h>
#include <lightningd/channel_control.h>
#include <lightningd/closing_control.h>
#include <lightningd/connect_control.h>
#include <lightningd/dual_open_control.h>
#include <lightningd/hsm_control.h>
#include <lightningd/jsonrpc.h>
#include <lightningd/lightningd.h>
#include <lightningd/log.h>
#include <lightningd/memdump.h>
#include <lightningd/notification.h>
#include <lightningd/onchain_control.h>
#include <lightningd/opening_common.h>
#include <lightningd/opening_control.h>
#include <lightningd/options.h>
#include <lightningd/peer_control.h>
#include <lightningd/peer_fd.h>
#include <lightningd/peer_htlcs.h>
#include <lightningd/plugin_hook.h>
#include <lightningd/subd.h>
#include <limits.h>
#include <onchaind/onchaind_wiregen.h>
#include <openingd/dualopend_wiregen.h>
#include <openingd/openingd_wiregen.h>
#include <stdlib.h>
#include <unistd.h>
#include <wally_bip32.h>
#include <wire/onion_wire.h>
#include <wire/wire_sync.h>
static void destroy_peer(struct peer *peer)
{
peer_node_id_map_del(peer->ld->peers, peer);
if (peer->dbid)
peer_dbid_map_del(peer->ld->peers_by_dbid, peer);
}
void peer_set_dbid(struct peer *peer, u64 dbid)
{
assert(!peer->dbid);
assert(dbid);
peer->dbid = dbid;
peer_dbid_map_add(peer->ld->peers_by_dbid, peer);
}
struct peer *new_peer(struct lightningd *ld, u64 dbid,
const struct node_id *id,
const struct wireaddr_internal *addr,
const u8 *their_features,
bool connected_incoming)
{
/* We are owned by our channels, and freed manually by destroy_channel */
struct peer *peer = tal(NULL, struct peer);
peer->ld = ld;
peer->dbid = dbid;
peer->id = *id;
peer->uncommitted_channel = NULL;
peer->addr = *addr;
peer->connected_incoming = connected_incoming;
peer->remote_addr = NULL;
list_head_init(&peer->channels);
peer->direction = node_id_idx(&peer->ld->id, &peer->id);
peer->connected = PEER_DISCONNECTED;
peer->last_connect_attempt.ts.tv_sec
= peer->last_connect_attempt.ts.tv_nsec = 0;
if (their_features)
peer->their_features = tal_dup_talarr(peer, u8, their_features);
else
peer->their_features = NULL;
peer->dev_ignore_htlcs = false;
peer_node_id_map_add(ld->peers, peer);
if (dbid)
peer_dbid_map_add(ld->peers_by_dbid, peer);
tal_add_destructor(peer, destroy_peer);
return peer;
}
static void delete_peer(struct peer *peer)
{
assert(list_empty(&peer->channels));
assert(!peer->uncommitted_channel);
/* If it only ever existed because of uncommitted channel, it won't
* be in the database */
if (peer->dbid != 0)
wallet_delete_peer_if_unused(peer->ld->wallet, peer->dbid);
tal_free(peer);
}
/* Last one out deletes peer. */
void maybe_delete_peer(struct peer *peer)
{
if (!list_empty(&peer->channels))
return;
if (peer->uncommitted_channel) {
/* This isn't sufficient to keep it in db! */
if (peer->dbid != 0) {
wallet_delete_peer_if_unused(peer->ld->wallet, peer->dbid);
peer_dbid_map_del(peer->ld->peers_by_dbid, peer);
peer->dbid = 0;
}
return;
}
/* Maybe it's reconnected / reconnecting? */
if (peer->connected != PEER_DISCONNECTED)
return;
delete_peer(peer);
}
static void peer_channels_cleanup(struct lightningd *ld,
const struct node_id *id)
{
struct peer *peer;
struct channel *c, **channels;
peer = peer_by_id(ld, id);
if (!peer)
return;
/* Freeing channels can free peer, so gather first. */
channels = tal_arr(tmpctx, struct channel *, 0);
list_for_each(&peer->channels, c, list)
tal_arr_expand(&channels, c);
if (peer->uncommitted_channel) {
/* Frees peer if no channels */
kill_uncommitted_channel(peer->uncommitted_channel,
"Disconnected");
} else if (tal_count(channels) == 0)
/* Was completely idle. */
tal_free(peer);
for (size_t i = 0; i < tal_count(channels); i++) {
c = channels[i];
if (channel_state_wants_peercomms(c->state)) {
channel_cleanup_commands(c, "Disconnected");
channel_fail_transient(c, true, "Disconnected");
} else if (channel_state_uncommitted(c->state)) {
channel_unsaved_close_conn(c, "Disconnected");
}
}
}
struct peer *find_peer_by_dbid(struct lightningd *ld, u64 dbid)
{
return peer_dbid_map_get(ld->peers_by_dbid, dbid);
}
struct peer *peer_by_id(struct lightningd *ld, const struct node_id *id)
{
return peer_node_id_map_get(ld->peers, id);
}
struct peer *peer_from_json(struct lightningd *ld,
const char *buffer,
const jsmntok_t *peeridtok)
{
struct node_id peerid;
if (!json_to_node_id(buffer, peeridtok, &peerid))
return NULL;
return peer_by_id(ld, &peerid);
}
u8 *p2wpkh_for_keyidx(const tal_t *ctx, struct lightningd *ld, u64 keyidx)
{
struct pubkey shutdownkey;
bip32_pubkey(ld, &shutdownkey, keyidx);
return scriptpubkey_p2wpkh(ctx, &shutdownkey);
}
u8 *p2tr_for_keyidx(const tal_t *ctx, struct lightningd *ld, u64 keyidx)
{
struct pubkey shutdownkey;
bip32_pubkey(ld, &shutdownkey, keyidx);
return scriptpubkey_p2tr(ctx, &shutdownkey);
}
static struct bitcoin_tx *sign_last_tx(const tal_t *ctx,
const struct channel *channel,
const struct bitcoin_tx *last_tx,
const struct bitcoin_signature *last_sig)
{
struct lightningd *ld = channel->peer->ld;
struct bitcoin_signature sig;
const u8 *msg;
u8 **witness;
u64 commit_index = channel->next_index[LOCAL] - 1;
struct bitcoin_tx *tx = clone_bitcoin_tx(ctx, last_tx);
assert(!tx->wtx->inputs[0].witness);
msg = towire_hsmd_sign_commitment_tx(NULL,
&channel->peer->id,
channel->dbid,
tx,
&channel->channel_info
.remote_fundingkey,
commit_index);
msg = hsm_sync_req(tmpctx, ld, take(msg));
if (!fromwire_hsmd_sign_commitment_tx_reply(msg, &sig))
fatal("HSM gave bad sign_commitment_tx_reply %s",
tal_hex(tmpctx, msg));
witness =
bitcoin_witness_2of2(tx, last_sig,
&sig, &channel->channel_info.remote_fundingkey,
&channel->local_funding_pubkey);
bitcoin_tx_input_set_witness(tx, 0, take(witness));
return tx;
}
bool invalid_last_tx(const struct bitcoin_tx *tx)
{
/* This problem goes back further, but was discovered just before the
* 0.7.1 release. */
#ifdef COMPAT_V070
/* Old bug had commitment txs with no outputs; bitcoin_txid asserts. */
return !tx || !tx->wtx || tx->wtx->num_outputs == 0;
#else
return false;
#endif
}
static bool commit_tx_send_finished(struct channel *channel,
const struct bitcoin_tx *tx,
bool success,
const char *err,
struct anchor_details *adet)
{
/* We might want to boost immediately! */
if (success)
commit_tx_boost(channel, &tx, adet);
/* Keep trying! */
return false;
}
static struct bitcoin_tx *sign_and_send_last(const tal_t *ctx,
struct lightningd *ld,
struct channel *channel,
const char *cmd_id,
const struct bitcoin_tx *last_tx,
const struct bitcoin_signature *last_sig)
{
struct bitcoin_txid txid;
struct anchor_details *adet;
struct bitcoin_tx *tx;
tx = sign_last_tx(ctx, channel, last_tx, last_sig);
bitcoin_txid(tx, &txid);
wallet_transaction_add(ld->wallet, tx->wtx, 0, 0);
/* Remember anchor information for commit_tx_boost */
adet = create_anchor_details(NULL, channel, tx);
/* Keep broadcasting until we say stop (can fail due to dup,
* if they beat us to the broadcast). */
broadcast_tx(ld->topology, channel, tx, cmd_id, false, 0,
commit_tx_send_finished, commit_tx_boost, take(adet));
return tx;
}
/* FIXME: reorder! */
static enum watch_result funding_spent(struct channel *channel,
const struct bitcoin_tx *tx,
size_t inputnum UNUSED,
const struct block *block);
/* We coop-closed channel: if another inflight confirms, force close */
static enum watch_result closed_inflight_depth_cb(struct lightningd *ld,
const struct bitcoin_txid *txid,
const struct bitcoin_tx *tx,
unsigned int depth,
struct channel_inflight *inflight)
{
if (depth == 0)
return KEEP_WATCHING;
/* This is now the main tx. */
update_channel_from_inflight(ld, inflight->channel, inflight);
channel_fail_permanent(inflight->channel,
REASON_UNKNOWN,
"Inflight tx %s confirmed after mutual close",
type_to_string(tmpctx, struct bitcoin_txid, txid));
return DELETE_WATCH;
}
void drop_to_chain(struct lightningd *ld, struct channel *channel,
bool cooperative)
{
struct channel_inflight *inflight;
const char *cmd_id;
/* If we're not already (e.g. close before channel fully open),
* make sure we're watching for the funding spend */
if (!channel->funding_spend_watch) {
log_debug(channel->log, "Adding funding_spend_watch");
channel->funding_spend_watch = watch_txo(channel,
ld->topology, channel,
&channel->funding,
funding_spent);
}
/* If this was triggered by a close command, get a copy of the cmd id */
cmd_id = cmd_id_from_close_command(tmpctx, ld, channel);
/* BOLT #2:
*
* - if `next_revocation_number` is greater than expected
* above, AND `your_last_per_commitment_secret` is correct for that
* `next_revocation_number` minus 1:
* - MUST NOT broadcast its commitment transaction.
*/
if (channel->future_per_commitment_point && !cooperative) {
log_broken(channel->log,
"Cannot broadcast our commitment tx:"
" they have a future one");
} else if (invalid_last_tx(channel->last_tx)) {
log_broken(channel->log,
"Cannot broadcast our commitment tx:"
" it's invalid! (ancient channel?)");
} else {
struct bitcoin_tx *tx COMPILER_WANTS_INIT("gcc 12.3.0");
/* We need to drop *every* commitment transaction to chain */
if (!cooperative && !list_empty(&channel->inflights)) {
list_for_each(&channel->inflights, inflight, list)
tx = sign_and_send_last(tmpctx, ld, channel, cmd_id,
inflight->last_tx,
&inflight->last_sig);
} else
tx = sign_and_send_last(tmpctx, ld, channel, cmd_id, channel->last_tx,
&channel->last_sig);
resolve_close_command(ld, channel, cooperative, tx);
}
/* In cooperative mode, we're assuming that we closed the right one:
* this might not happen if we're splicing, or dual-funding still
* opening. So, if we get any unexpected inflight confirming, we
* force close. */
if (cooperative) {
list_for_each(&channel->inflights, inflight, list) {
if (bitcoin_outpoint_eq(&inflight->funding->outpoint,
&channel->funding)) {
continue;
}
watch_txid(inflight, ld->topology,
&inflight->funding->outpoint.txid,
closed_inflight_depth_cb, inflight);
}
}
}
void resend_closing_transactions(struct lightningd *ld)
{
struct peer *peer;
struct channel *channel;
struct peer_node_id_map_iter it;
for (peer = peer_node_id_map_first(ld->peers, &it);
peer;
peer = peer_node_id_map_next(ld->peers, &it)) {
list_for_each(&peer->channels, channel, list) {
switch (channel->state) {
case CHANNELD_AWAITING_LOCKIN:
case CHANNELD_NORMAL:
case DUALOPEND_OPEN_INIT:
case DUALOPEND_OPEN_COMMITTED:
case DUALOPEND_AWAITING_LOCKIN:
case CHANNELD_AWAITING_SPLICE:
case CHANNELD_SHUTTING_DOWN:
case CLOSINGD_SIGEXCHANGE:
case FUNDING_SPEND_SEEN:
case ONCHAIN:
case CLOSED:
continue;
case CLOSINGD_COMPLETE:
drop_to_chain(ld, channel, true);
continue;
case AWAITING_UNILATERAL:
drop_to_chain(ld, channel, false);
continue;
}
abort();
}
}
}
void channel_errmsg(struct channel *channel,
struct peer_fd *peer_fd,
const char *desc,
const u8 *err_for_them,
bool disconnect,
bool warning)
{
/* Clean up any in-progress open attempts */
channel_cleanup_commands(channel, desc);
if (channel_state_uncommitted(channel->state)) {
log_info(channel->log, "%s", "Unsaved peer failed."
" Deleting channel.");
delete_channel(channel);
return;
}
/* No peer_fd means a subd crash or disconnection. */
if (!peer_fd) {
/* If the channel is unsaved, we forget it */
channel_fail_transient(channel, disconnect, "%s: %s",
channel->owner->name, desc);
return;
}
/* Do we have an error to send? */
if (err_for_them && !channel->error && !warning)
channel->error = tal_dup_talarr(channel, u8, err_for_them);
/* LND sends "internal error" and we close the channel. But
* prior to 0.11 we would turn this into a warning, and they
* would recover after a reconnect. So we downgrade, but snark
* about it in the logs. */
if (!err_for_them && strends(desc, "internal error")) {
channel_fail_transient(channel, disconnect, "%s: %s",
channel->owner->name,
"lnd sent 'internal error':"
" let's give it some space");
return;
}
/* This is us, sending a warning. */
if (warning) {
channel_fail_transient(channel, disconnect, "%s sent %s",
channel->owner->name,
desc);
return;
}
/* BOLT #1:
*
* A sending node:
*...
* - when sending `error`:
* - MUST fail the channel(s) referred to by the error message.
* - MAY set `channel_id` to all zero to indicate all channels.
*/
/* FIXME: Close if it's an all-channels error sent or rcvd */
/* BOLT #1:
*
* A sending node:
*...
* - when sending `error`:
* - MUST fail the channel(s) referred to by the error message.
* - MAY set `channel_id` to all zero to indicate all channels.
*...
* The receiving node:
* - upon receiving `error`:
* - if `channel_id` is all zero:
* - MUST fail all channels with the sending node.
* - otherwise:
* - MUST fail the channel referred to by `channel_id`, if that channel is with the
* sending node.
*/
/* FIXME: We don't close all channels */
/* We should immediately forget the channel if we receive error during
* CHANNELD_AWAITING_LOCKIN if we are fundee. */
if (!err_for_them && channel->opener == REMOTE
&& channel->state == CHANNELD_AWAITING_LOCKIN)
channel_fail_forget(channel, "%s: %s %s",
channel->owner->name,
err_for_them ? "sent" : "received", desc);
else
channel_fail_permanent(channel,
err_for_them ? REASON_LOCAL : REASON_PROTOCOL,
"%s: %s %s",
channel->owner->name,
err_for_them ? "sent" : "received", desc);
}
static void json_add_htlcs(struct lightningd *ld,
struct json_stream *response,
const struct channel *channel)
{
/* FIXME: make per-channel htlc maps! */
const struct htlc_in *hin;
struct htlc_in_map_iter ini;
const struct htlc_out *hout;
struct htlc_out_map_iter outi;
u32 local_feerate = get_feerate(channel->fee_states,
channel->opener, LOCAL);
/* FIXME: Add more fields. */
json_array_start(response, "htlcs");
for (hin = htlc_in_map_first(ld->htlcs_in, &ini);
hin;
hin = htlc_in_map_next(ld->htlcs_in, &ini)) {
if (hin->key.channel != channel)
continue;
json_object_start(response, NULL);
json_add_string(response, "direction", "in");
json_add_u64(response, "id", hin->key.id);
json_add_amount_msat(response, "amount_msat", hin->msat);
json_add_u32(response, "expiry", hin->cltv_expiry);
json_add_sha256(response, "payment_hash", &hin->payment_hash);
json_add_string(response, "state",
htlc_state_name(hin->hstate));
if (htlc_is_trimmed(REMOTE, hin->msat, local_feerate,
channel->our_config.dust_limit, LOCAL,
channel_has(channel, OPT_ANCHOR_OUTPUTS),
channel_has(channel, OPT_ANCHORS_ZERO_FEE_HTLC_TX)))
json_add_bool(response, "local_trimmed", true);
if (hin->status != NULL)
json_add_string(response, "status", hin->status);
json_object_end(response);
}
for (hout = htlc_out_map_first(ld->htlcs_out, &outi);
hout;
hout = htlc_out_map_next(ld->htlcs_out, &outi)) {
if (hout->key.channel != channel)
continue;
json_object_start(response, NULL);
json_add_string(response, "direction", "out");
json_add_u64(response, "id", hout->key.id);
json_add_amount_msat(response, "amount_msat", hout->msat);
json_add_u64(response, "expiry", hout->cltv_expiry);
json_add_sha256(response, "payment_hash", &hout->payment_hash);
json_add_string(response, "state",
htlc_state_name(hout->hstate));
if (htlc_is_trimmed(LOCAL, hout->msat, local_feerate,
channel->our_config.dust_limit, LOCAL,
channel_has(channel, OPT_ANCHOR_OUTPUTS),
channel_has(channel, OPT_ANCHORS_ZERO_FEE_HTLC_TX)))
json_add_bool(response, "local_trimmed", true);
json_object_end(response);
}
json_array_end(response);
}
/* Fee a commitment transaction would currently cost */
static struct amount_sat commit_txfee(const struct channel *channel,
struct amount_msat amount,
enum side side)
{
/* FIXME: make per-channel htlc maps! */
const struct htlc_in *hin;
struct htlc_in_map_iter ini;
const struct htlc_out *hout;
struct htlc_out_map_iter outi;
struct lightningd *ld = channel->peer->ld;
size_t num_untrimmed_htlcs = 0;
u32 feerate = get_feerate(channel->fee_states,
channel->opener, side);
struct amount_sat dust_limit;
struct amount_sat fee;
bool option_anchor_outputs = channel_has(channel, OPT_ANCHOR_OUTPUTS);
bool option_anchors_zero_fee_htlc_tx = channel_has(channel, OPT_ANCHORS_ZERO_FEE_HTLC_TX);
if (side == LOCAL)
dust_limit = channel->our_config.dust_limit;
if (side == REMOTE)
dust_limit = channel->channel_info.their_config.dust_limit;
/* Assume we tried to add "amount" */
if (!htlc_is_trimmed(side, amount, feerate, dust_limit, side,
option_anchor_outputs, option_anchors_zero_fee_htlc_tx))
num_untrimmed_htlcs++;
for (hin = htlc_in_map_first(ld->htlcs_in, &ini);
hin;
hin = htlc_in_map_next(ld->htlcs_in, &ini)) {
if (hin->key.channel != channel)
continue;
if (!htlc_is_trimmed(!side, hin->msat, feerate, dust_limit,
side, option_anchor_outputs, option_anchors_zero_fee_htlc_tx))
num_untrimmed_htlcs++;
}
for (hout = htlc_out_map_first(ld->htlcs_out, &outi);
hout;
hout = htlc_out_map_next(ld->htlcs_out, &outi)) {
if (hout->key.channel != channel)
continue;
if (!htlc_is_trimmed(side, hout->msat, feerate, dust_limit,
side, option_anchor_outputs, option_anchors_zero_fee_htlc_tx))
num_untrimmed_htlcs++;
}
/*
* BOLT #2:
* A sending node:
*...
* - SHOULD NOT offer `amount_msat` if, after adding that HTLC to its
* commitment transaction, its remaining balance doesn't allow it to
* pay the commitment transaction fee when receiving or sending a
* future additional non-dust HTLC while maintaining its channel
* reserve. It is recommended that this "fee spike buffer" can
* handle twice the current `feerate_per_kw` to ensure
* predictability between implementations.
*/
fee = commit_tx_base_fee(2 * feerate, num_untrimmed_htlcs + 1,
option_anchor_outputs, option_anchors_zero_fee_htlc_tx);
if (option_anchor_outputs || option_anchors_zero_fee_htlc_tx) {
/* BOLT #3:
* If `option_anchors` applies to the commitment
* transaction, also subtract two times the fixed anchor size
* of 330 sats from the funder (either `to_local` or
* `to_remote`).
*/
if (!amount_sat_add(&fee, fee, AMOUNT_SAT(660)))
; /* fee is somehow astronomical already.... */
}
return fee;
}
static void subtract_offered_htlcs(const struct channel *channel,
struct amount_msat *amount)
{
const struct htlc_out *hout;
struct htlc_out_map_iter outi;
struct lightningd *ld = channel->peer->ld;
for (hout = htlc_out_map_first(ld->htlcs_out, &outi);
hout;
hout = htlc_out_map_next(ld->htlcs_out, &outi)) {
if (hout->key.channel != channel)
continue;
if (!amount_msat_sub(amount, *amount, hout->msat))
*amount = AMOUNT_MSAT(0);
}
}
static void subtract_received_htlcs(const struct channel *channel,
struct amount_msat *amount)
{
const struct htlc_in *hin;
struct htlc_in_map_iter ini;
struct lightningd *ld = channel->peer->ld;
for (hin = htlc_in_map_first(ld->htlcs_in, &ini);
hin;
hin = htlc_in_map_next(ld->htlcs_in, &ini)) {
if (hin->key.channel != channel)
continue;
if (!amount_msat_sub(amount, *amount, hin->msat))
*amount = AMOUNT_MSAT(0);
}
}
struct amount_msat channel_amount_spendable(const struct channel *channel)
{
struct amount_msat spendable;
bool wumbo;
/* Compute how much we can send via this channel in one payment. */
if (!amount_msat_sub_sat(&spendable,
channel->our_msat,
channel->channel_info.their_config.channel_reserve))
return AMOUNT_MSAT(0);
/* Take away any currently-offered HTLCs. */
subtract_offered_htlcs(channel, &spendable);
/* If we're opener, subtract txfees we'll need to spend this */
if (channel->opener == LOCAL) {
if (!amount_msat_sub_sat(&spendable, spendable,
commit_txfee(channel, spendable,
LOCAL)))
return AMOUNT_MSAT(0);
}
/* We can't offer an HTLC less than the other side will accept. */
if (amount_msat_less(spendable,
channel->channel_info.their_config.htlc_minimum))
return AMOUNT_MSAT(0);
wumbo = feature_negotiated(channel->peer->ld->our_features,
channel->peer->their_features,
OPT_LARGE_CHANNELS);
/* We can't offer an HTLC over the max payment threshold either. */
if (amount_msat_greater(spendable, chainparams->max_payment)
&& !wumbo) {
spendable = chainparams->max_payment;
}
return spendable;
}
struct amount_msat channel_amount_receivable(const struct channel *channel)
{
struct amount_msat their_msat, receivable;
bool wumbo;
/* Compute how much we can receive via this channel in one payment */
if (!amount_sat_sub_msat(&their_msat,
channel->funding_sats, channel->our_msat))
their_msat = AMOUNT_MSAT(0);
if (!amount_msat_sub_sat(&receivable,
their_msat,
channel->our_config.channel_reserve))
return AMOUNT_MSAT(0);
/* Take away any currently-offered HTLCs. */
subtract_received_htlcs(channel, &receivable);
/* If they're opener, subtract txfees they'll need to spend this */
if (channel->opener == REMOTE) {
if (!amount_msat_sub_sat(&receivable, receivable,
commit_txfee(channel,
receivable, REMOTE)))
return AMOUNT_MSAT(0);
}
/* They can't offer an HTLC less than what we will accept. */
if (amount_msat_less(receivable, channel->our_config.htlc_minimum))
return AMOUNT_MSAT(0);
wumbo = feature_negotiated(channel->peer->ld->our_features,
channel->peer->their_features,
OPT_LARGE_CHANNELS);
/* They can't offer an HTLC over the max payment threshold either. */
if (amount_msat_greater(receivable, chainparams->max_payment)
&& !wumbo) {
receivable = chainparams->max_payment;
}
return receivable;
}
void json_add_channel_type(struct json_stream *response,
const char *fieldname,
const struct channel_type *channel_type)
{
const char **fnames;
json_object_start(response, fieldname);
json_array_start(response, "bits");
for (size_t i = 0; i < tal_bytelen(channel_type->features) * CHAR_BIT; i++) {
if (!feature_is_set(channel_type->features, i))
continue;
json_add_u64(response, NULL, i);
}
json_array_end(response);
json_array_start(response, "names");
fnames = channel_type_name(tmpctx, channel_type);
for (size_t i = 0; i < tal_count(fnames); i++)
json_add_string(response, NULL, fnames[i]);
json_array_end(response);
json_object_end(response);
}
static void json_add_channel(struct lightningd *ld,
struct json_stream *response, const char *key,
const struct channel *channel,
/* Only set for listpeerchannels */
const struct peer *peer)
{
struct channel_stats channel_stats;
struct amount_msat funding_msat;
struct amount_sat peer_funded_sats;
struct state_change_entry *state_changes;
u32 feerate;
json_object_start(response, key);
if (peer) {
json_add_node_id(response, "peer_id", &peer->id);
json_add_bool(response, "peer_connected", peer->connected == PEER_CONNECTED);
json_add_channel_type(response, "channel_type", channel->type);
if (channel->ignore_fee_limits) {
json_add_bool(response, "ignore_fee_limits", channel->ignore_fee_limits);
}
}
json_add_string(response, "state", channel_state_name(channel));
if (channel->last_tx && !invalid_last_tx(channel->last_tx)) {
struct bitcoin_txid txid;
bitcoin_txid(channel->last_tx, &txid);
json_add_txid(response, "scratch_txid", &txid);
json_add_amount_sat_msat(response, "last_tx_fee_msat",
bitcoin_tx_compute_fee(channel->last_tx));
}
json_object_start(response, "feerate");
feerate = get_feerate(channel->fee_states, channel->opener, LOCAL);
json_add_u32(response, feerate_style_name(FEERATE_PER_KSIPA), feerate);
json_add_u32(response, feerate_style_name(FEERATE_PER_KBYTE),
feerate_to_style(feerate, FEERATE_PER_KBYTE));
json_object_end(response);
if (channel->owner)
json_add_string(response, "owner", channel->owner->name);
if (channel->scid)
json_add_short_channel_id(response, "short_channel_id",
channel->scid);
/* If there is any way we can use the channel we'd better have
* a direction attached. Technically we could always add it,
* as it's just the lexicographic order between node_ids, but
* why bother if we can't use it? */
if (channel->scid || channel->alias[LOCAL] || channel->alias[REMOTE])
json_add_num(response, "direction",
node_id_idx(&ld->id, &channel->peer->id));
json_add_string(response, "channel_id",
type_to_string(tmpctx, struct channel_id, &channel->cid));
json_add_txid(response, "funding_txid", &channel->funding.txid);
json_add_num(response, "funding_outnum", channel->funding.n);
if (!list_empty(&channel->inflights)) {
struct channel_inflight *initial, *inflight;
u32 last_feerate, next_feerate;
initial = list_top(&channel->inflights,
struct channel_inflight, list);
json_add_string(response, "initial_feerate",
tal_fmt(tmpctx, "%d%s",
initial->funding->feerate,
feerate_style_name(FEERATE_PER_KSIPA)));
last_feerate = channel_last_funding_feerate(channel);
assert(last_feerate > 0);
json_add_string(response, "last_feerate",
tal_fmt(tmpctx, "%d%s", last_feerate,
feerate_style_name(FEERATE_PER_KSIPA)));
/* BOLT-9e7723387c8859b511e178485605a0b9133b9869 #2:
* - MUST set `funding_feerate_perkw` greater than or equal to
* 65/64 times the last sent `funding_feerate_perkw`
* rounded down.
*/
next_feerate = last_feerate * 65 / 64;
assert(next_feerate > last_feerate);
json_add_string(response, "next_feerate",
tal_fmt(tmpctx, "%d%s", next_feerate,
feerate_style_name(FEERATE_PER_KSIPA)));
/* List the inflights */
json_array_start(response, "inflight");
list_for_each(&channel->inflights, inflight, list) {
struct bitcoin_txid txid;
json_object_start(response, NULL);
json_add_txid(response, "funding_txid",
&inflight->funding->outpoint.txid);
json_add_num(response, "funding_outnum",
inflight->funding->outpoint.n);
json_add_string(response, "feerate",
tal_fmt(tmpctx, "%d%s",
inflight->funding->feerate,
feerate_style_name(
FEERATE_PER_KSIPA)));
json_add_amount_sat_msat(response,
"total_funding_msat",
inflight->funding->total_funds);
json_add_amount_sat_msat(response,
"our_funding_msat",
inflight->funding->our_funds);
json_add_s64(response,
"splice_amount",
inflight->funding->splice_amnt);
/* Add the expected commitment tx id also */
bitcoin_txid(inflight->last_tx, &txid);
json_add_txid(response, "scratch_txid", &txid);
json_object_end(response);
}
json_array_end(response);
}
if (channel->shutdown_scriptpubkey[LOCAL]) {
char *addr = encode_scriptpubkey_to_addr(tmpctx,
chainparams,
channel->shutdown_scriptpubkey[LOCAL]);
if (addr)
json_add_string(response, "close_to_addr", addr);
json_add_hex_talarr(response, "close_to",
channel->shutdown_scriptpubkey[LOCAL]);
}
json_add_bool(
response, "private",
!(channel->channel_flags & CHANNEL_FLAGS_ANNOUNCE_CHANNEL));
/* opener and closer */
assert(channel->opener != NUM_SIDES);
json_add_string(response, "opener", channel->opener == LOCAL ?
"local" : "remote");
if (channel->closer != NUM_SIDES)
json_add_string(response, "closer", channel->closer == LOCAL ?
"local" : "remote");
if (channel->alias[LOCAL] || channel->alias[REMOTE]) {
json_object_start(response, "alias");
if (channel->alias[LOCAL])
json_add_short_channel_id(response, "local",
channel->alias[LOCAL]);
if (channel->alias[REMOTE])
json_add_short_channel_id(response, "remote",
channel->alias[REMOTE]);
json_object_end(response);
}
json_array_start(response, "features");
if (channel_has(channel, OPT_STATIC_REMOTEKEY))
json_add_string(response, NULL, "option_static_remotekey");
if (channel_has(channel, OPT_ANCHOR_OUTPUTS))
json_add_string(response, NULL, "option_anchor_outputs");
if (channel_has(channel, OPT_ANCHORS_ZERO_FEE_HTLC_TX))
json_add_string(response, NULL, "option_anchors_zero_fee_htlc_tx");
if (channel_has(channel, OPT_ZEROCONF))
json_add_string(response, NULL, "option_zeroconf");
if (channel_has(channel, OPT_SCID_ALIAS))
json_add_string(response, NULL, "option_scid_alias");
json_array_end(response);
if (!amount_sat_sub(&peer_funded_sats, channel->funding_sats,
channel->our_funds)) {
log_broken(channel->log,
"Overflow subtracing funding %s, our funds %s",
type_to_string(tmpctx, struct amount_sat,
&channel->funding_sats),
type_to_string(tmpctx, struct amount_sat,
&channel->our_funds));
peer_funded_sats = AMOUNT_SAT(0);
}
json_object_start(response, "funding");
if (channel->lease_commit_sig) {
struct amount_sat funds, total;
if (!amount_msat_to_sat(&funds, channel->push)) {
log_broken(channel->log,
"Can't convert channel->push %s to sats"
" (lease fees?)",
type_to_string(tmpctx, struct amount_msat,
&channel->push));
funds = AMOUNT_SAT(0);
}
if (channel->opener == LOCAL) {
if (!amount_sat_add(&total, funds, channel->our_funds)) {
log_broken(channel->log,
"Overflow adding our_funds to push");
total = channel->our_funds;
}
json_add_amount_sat_msat(response, "local_funds_msat", total);
if (!amount_sat_sub(&total, peer_funded_sats, funds)) {
log_broken(channel->log,
"Underflow sub'ing push from"
" peer's funds");
total = peer_funded_sats;
}
json_add_amount_sat_msat(response, "remote_funds_msat", total);
json_add_amount_msat(response, "fee_paid_msat",
channel->push);
} else {
if (!amount_sat_add(&total, peer_funded_sats, funds)) {
log_broken(channel->log,
"Overflow adding peer funds to push");
total = peer_funded_sats;
}
json_add_amount_sat_msat(response, "remote_funds_msat", total);
if (!amount_sat_sub(&total, channel->our_funds, funds)) {
log_broken(channel->log,
"Underflow sub'ing push from"
" our_funds");
total = channel->our_funds;
}
json_add_amount_sat_msat(response, "local_funds_msat", total);
json_add_amount_msat(response, "fee_rcvd_msat",
channel->push);
}
} else {
json_add_amount_sat_msat(response, "local_funds_msat",
channel->our_funds);
json_add_amount_sat_msat(response, "remote_funds_msat",
peer_funded_sats);
json_add_amount_msat(response, "pushed_msat",
channel->push);
}
json_object_end(response);
if (!amount_sat_to_msat(&funding_msat, channel->funding_sats)) {
log_broken(channel->log,
"Overflow converting funding %s",
type_to_string(tmpctx, struct amount_sat,
&channel->funding_sats));
funding_msat = AMOUNT_MSAT(0);
}
json_add_amount_msat(response, "to_us_msat", channel->our_msat);
json_add_amount_msat(response,
"min_to_us_msat", channel->msat_to_us_min);
json_add_amount_msat(response,
"max_to_us_msat", channel->msat_to_us_max);
json_add_amount_msat(response, "total_msat", funding_msat);
/* routing fees */
json_add_amount_msat(response, "fee_base_msat",
amount_msat(channel->feerate_base));
json_add_u32(response, "fee_proportional_millionths",
channel->feerate_ppm);
/* channel config */
json_add_amount_sat_msat(response, "dust_limit_msat",
channel->our_config.dust_limit);
json_add_amount_msat(response, "max_total_htlc_in_msat",
channel->our_config.max_htlc_value_in_flight);
/* The `channel_reserve_satoshis` is imposed on
* the *other* side (see `channel_reserve_msat`
* function in, it uses `!side` to flip sides).
* So our configuration `channel_reserve_satoshis`
* is imposed on their side, while their
* configuration `channel_reserve_satoshis` is
* imposed on ours. */
json_add_amount_sat_msat(response,
"their_reserve_msat",
channel->our_config.channel_reserve);
json_add_amount_sat_msat(response,
"our_reserve_msat",
channel->channel_info.their_config.channel_reserve);
/* append spendable to JSON output */
json_add_amount_msat(response,
"spendable_msat",
channel_amount_spendable(channel));
/* append receivable to JSON output */
json_add_amount_msat(response,
"receivable_msat",
channel_amount_receivable(channel));
json_add_amount_msat(response,
"minimum_htlc_in_msat",
channel->our_config.htlc_minimum);
json_add_amount_msat(response,
"minimum_htlc_out_msat",
channel->htlc_minimum_msat);
json_add_amount_msat(response,
"maximum_htlc_out_msat",
channel->htlc_maximum_msat);
/* The `to_self_delay` is imposed on the *other*
* side, so our configuration `to_self_delay` is
* imposed on their side, while their configuration
* `to_self_delay` is imposed on ours. */
json_add_num(response, "their_to_self_delay",
channel->our_config.to_self_delay);
json_add_num(response, "our_to_self_delay",
channel->channel_info.their_config.to_self_delay);
json_add_num(response, "max_accepted_htlcs",
channel->our_config.max_accepted_htlcs);
state_changes = wallet_state_change_get(ld->wallet, tmpctx, channel->dbid);
json_array_start(response, "state_changes");
for (size_t i = 0; i < tal_count(state_changes); i++) {
json_object_start(response, NULL);
json_add_timeiso(response, "timestamp",
state_changes[i].timestamp);
json_add_string(response, "old_state",
channel_state_str(state_changes[i].old_state));
json_add_string(response, "new_state",
channel_state_str(state_changes[i].new_state));
json_add_string(response, "cause",
channel_change_state_reason_str(state_changes[i].cause));
json_add_string(response, "message", state_changes[i].message);
json_object_end(response);
}
json_array_end(response);
json_array_start(response, "status");
for (size_t i = 0; i < ARRAY_SIZE(channel->billboard.permanent); i++) {
if (!channel->billboard.permanent[i])
continue;
json_add_string(response, NULL,
channel->billboard.permanent[i]);
}
if (channel->billboard.transient)
json_add_string(response, NULL, channel->billboard.transient);
json_array_end(response);
/* Provide channel statistics */
wallet_channel_stats_load(ld->wallet, channel->dbid, &channel_stats);
json_add_u64(response, "in_payments_offered",
channel_stats.in_payments_offered);
json_add_amount_msat(response,
"in_offered_msat",
channel_stats.in_msatoshi_offered);
json_add_u64(response, "in_payments_fulfilled",
channel_stats.in_payments_fulfilled);
json_add_amount_msat(response,
"in_fulfilled_msat",
channel_stats.in_msatoshi_fulfilled);
json_add_u64(response, "out_payments_offered",
channel_stats.out_payments_offered);
json_add_amount_msat(response,
"out_offered_msat",
channel_stats.out_msatoshi_offered);
json_add_u64(response, "out_payments_fulfilled",
channel_stats.out_payments_fulfilled);
json_add_amount_msat(response,
"out_fulfilled_msat",
channel_stats.out_msatoshi_fulfilled);
json_add_htlcs(ld, response, channel);
json_object_end(response);
}
struct peer_connected_hook_payload {
struct lightningd *ld;
struct wireaddr_internal addr;
struct wireaddr *remote_addr;
bool incoming;
/* We don't keep a pointer to peer: it might be freed! */
struct node_id peer_id;
u8 *error;
};
static void
peer_connected_serialize(struct peer_connected_hook_payload *payload,
struct json_stream *stream, struct plugin *plugin)
{
json_object_start(stream, "peer");
json_add_node_id(stream, "id", &payload->peer_id);
json_add_string(stream, "direction", payload->incoming ? "in" : "out");
json_add_string(
stream, "addr",
type_to_string(stream, struct wireaddr_internal, &payload->addr));
if (payload->remote_addr)
json_add_string(
stream, "remote_addr",
type_to_string(stream, struct wireaddr, payload->remote_addr));
/* Since this is start of hook, peer is always in table! */
json_add_hex_talarr(stream, "features",
peer_by_id(payload->ld, &payload->peer_id)
->their_features);
json_object_end(stream); /* .peer */
}
/* Talk to connectd about an active channel */
static void connect_activate_subd(struct lightningd *ld, struct channel *channel)
{
const u8 *error;
int fds[2];
/* If we have a canned error for this channel, send it now */
if (channel->error) {
error = channel->error;
goto send_error;
}
switch (channel->state) {
case ONCHAIN:
case FUNDING_SPEND_SEEN:
case CLOSINGD_COMPLETE:
case CLOSED:
case DUALOPEND_OPEN_INIT:
/* Channel is active */
abort();
case AWAITING_UNILATERAL:
/* channel->error is not saved in db, so this can
* happen if we restart. */
error = towire_errorfmt(tmpctx, &channel->cid,
"Awaiting unilateral close");
goto send_error;
case DUALOPEND_OPEN_COMMITTED:
case DUALOPEND_AWAITING_LOCKIN:
assert(!channel->owner);
if (socketpair(AF_LOCAL, SOCK_STREAM, 0, fds) != 0) {
log_broken(channel->log,
"Failed to create socketpair: %s",
strerror(errno));
error = towire_warningfmt(tmpctx, &channel->cid,
"Trouble in paradise?");
goto send_error;
}
if (peer_restart_dualopend(channel->peer,
new_peer_fd(tmpctx, fds[0]),
channel, false))
goto tell_connectd;
close(fds[1]);
return;
case CHANNELD_AWAITING_LOCKIN:
case CHANNELD_NORMAL:
case CHANNELD_AWAITING_SPLICE:
case CHANNELD_SHUTTING_DOWN:
case CLOSINGD_SIGEXCHANGE:
assert(!channel->owner);
if (socketpair(AF_LOCAL, SOCK_STREAM, 0, fds) != 0) {
log_broken(channel->log,
"Failed to create socketpair: %s",
strerror(errno));
error = towire_warningfmt(tmpctx, &channel->cid,
"Trouble in paradise?");
goto send_error;
}
if (peer_start_channeld(channel,
new_peer_fd(tmpctx, fds[0]),
NULL, true,
NULL)) {
goto tell_connectd;
}
close(fds[1]);
return;
}
abort();
tell_connectd:
subd_send_msg(ld->connectd,
take(towire_connectd_peer_connect_subd(NULL,
&channel->peer->id,
channel->peer->connectd_counter,
&channel->cid)));
subd_send_fd(ld->connectd, fds[1]);
return;
send_error:
log_debug(channel->log, "Telling connectd to send error %s",
tal_hex(tmpctx, error));
/* Get connectd to send error and close. */
subd_send_msg(ld->connectd,
take(towire_connectd_peer_final_msg(NULL, &channel->peer->id,
channel->peer->connectd_counter,
error)));
}
static void peer_connected_hook_final(struct peer_connected_hook_payload *payload STEALS)
{
struct lightningd *ld = payload->ld;
struct channel *channel;
struct wireaddr_internal addr = payload->addr;
struct peer *peer;
u8 *error;
/* Whatever happens, we free payload (it's currently a child
* of the peer, which may be freed if we fail to start
* subd). */
tal_steal(tmpctx, payload);
/* Peer might have gone away while we were waiting for plugin! */
peer = peer_by_id(ld, &payload->peer_id);
if (!peer)
return;
/* If we disconnected in the meantime, forget about it.
* (disconnect will have failed any connect commands).
* And if it has reconnected, and we're the second time the
* hook has been called, it'll be PEER_CONNECTED. */
if (peer->connected != PEER_CONNECTING)
return;
/* Check for specific errors of a hook */
if (payload->error) {
error = payload->error;
goto send_error;
}
/* Now we finally consider ourselves connected! */
assert(peer->connected == PEER_CONNECTING);
peer->connected = PEER_CONNECTED;
/* Succeed any connect() commands */
connect_succeeded(ld, peer, payload->incoming, &payload->addr);
/* Notify anyone who cares */
notify_connect(ld, &peer->id, payload->incoming, &addr);
/* Developer hack to fail all channels on permfail line. */
if (dev_disconnect_permanent(ld)) {
list_for_each(&peer->channels, channel, list) {
channel_fail_permanent(channel, REASON_LOCAL,
"dev_disconnect permfail");
subd_send_msg(ld->connectd,
take(towire_connectd_peer_final_msg(NULL, &peer->id,
peer->connectd_counter,
channel->error)));
}
return;
}
/* connect appropriate subds for all (active) channels! */
list_for_each(&peer->channels, channel, list) {
/* FIXME: It can race by opening a channel before this! */
if (channel_state_wants_peercomms(channel->state) && !channel->owner) {
log_debug(channel->log, "Peer has reconnected, state %s: connecting subd",
channel_state_name(channel));
connect_activate_subd(ld, channel);
}
}
return;
send_error:
log_peer_debug(ld->log, &peer->id, "Telling connectd to send error %s",
tal_hex(tmpctx, error));
/* Get connectd to send error and close. */
subd_send_msg(ld->connectd,
take(towire_connectd_peer_final_msg(NULL, &peer->id,
peer->connectd_counter,
error)));
}
static bool
peer_connected_hook_deserialize(struct peer_connected_hook_payload *payload,
const char *buffer,
const jsmntok_t *toks)
{
struct lightningd *ld = payload->ld;
/* already rejected by prior plugin hook in the chain */
if (payload->error != NULL)
return true;
if (!toks || !buffer)
return true;
/* If we had a hook, interpret result. */
const jsmntok_t *t_res = json_get_member(buffer, toks, "result");
const jsmntok_t *t_err = json_get_member(buffer, toks, "error_message");
/* fail */
if (!t_res)
fatal("Plugin returned an invalid response to the "
"peer_connected hook: %s", buffer);
/* reject */
if (json_tok_streq(buffer, t_res, "disconnect")) {
payload->error = (u8*)"";
if (t_err) {
payload->error = towire_warningfmt(tmpctx, NULL, "%.*s",
t_err->end - t_err->start,
buffer + t_err->start);
}
log_debug(ld->log, "peer_connected hook rejects and says '%s'",
payload->error);
/* At this point we suppress other plugins in the chain and
* directly move to final */
peer_connected_hook_final(payload);
return false;
} else if (!json_tok_streq(buffer, t_res, "continue"))
fatal("Plugin returned an invalid response to the "
"peer_connected hook: %s", buffer);
/* call next hook */
return true;
}
/* Compare and store `remote_addr` and the `peer_id` that reported it.
* If new address was reported by at least one other, do node_announcement */
static void update_remote_addr(struct lightningd *ld,
const struct wireaddr *remote_addr,
const struct node_id peer_id)
{
/* failsafe to prevent privacy leakage. */
if (ld->always_use_proxy ||
ld->config.ip_discovery == OPT_AUTOBOOL_FALSE)
return;
switch (remote_addr->type) {
case ADDR_TYPE_IPV4:
/* init pointers first time */
if (ld->remote_addr_v4 == NULL) {
ld->remote_addr_v4 = tal_dup(ld, struct wireaddr,
remote_addr);
ld->remote_addr_v4_peer = peer_id;
}
/* if updated by the same peer just remember the latest addr */
if (node_id_eq(&ld->remote_addr_v4_peer, &peer_id)) {
*ld->remote_addr_v4 = *remote_addr;
break;
}
/* tell gossip we have a valid update */
if (wireaddr_eq_without_port(ld->remote_addr_v4, remote_addr)) {
ld->discovered_ip_v4 = tal_dup(ld, struct wireaddr,
ld->remote_addr_v4);
ld->discovered_ip_v4->port = ld->config.ip_discovery_port;
subd_send_msg(ld->gossip, towire_gossipd_discovered_ip(
tmpctx,
ld->discovered_ip_v4));
}
/* store latest values */
*ld->remote_addr_v4 = *remote_addr;
ld->remote_addr_v4_peer = peer_id;
break;
case ADDR_TYPE_IPV6:
/* same code :s/4/6/ without the comments ;) */
if (ld->remote_addr_v6 == NULL) {
ld->remote_addr_v6 = tal_dup(ld, struct wireaddr,
remote_addr);
ld->remote_addr_v6_peer = peer_id;
}
if (node_id_eq(&ld->remote_addr_v6_peer, &peer_id)) {
*ld->remote_addr_v6 = *remote_addr;
break;
}
if (wireaddr_eq_without_port(ld->remote_addr_v6, remote_addr)) {
ld->discovered_ip_v6 = tal_dup(ld, struct wireaddr,
ld->remote_addr_v6);
ld->discovered_ip_v6->port = ld->config.ip_discovery_port;
subd_send_msg(ld->gossip, towire_gossipd_discovered_ip(
tmpctx,
ld->discovered_ip_v6));
}
*ld->remote_addr_v6 = *remote_addr;
ld->remote_addr_v6_peer = peer_id;
break;
/* ignore all other cases */
case ADDR_TYPE_TOR_V2_REMOVED:
case ADDR_TYPE_TOR_V3:
case ADDR_TYPE_DNS:
break;
}
}
REGISTER_PLUGIN_HOOK(peer_connected,
peer_connected_hook_deserialize,
peer_connected_hook_final,
peer_connected_serialize,
struct peer_connected_hook_payload *);
/* Connectd tells us a peer has connected: it never hands us duplicates, since
* it holds them until we say peer_disconnected. */
void peer_connected(struct lightningd *ld, const u8 *msg)
{
struct node_id id;
u8 *their_features;
struct peer *peer;
struct peer_connected_hook_payload *hook_payload;
u64 connectd_counter;
const char *cmd_id;
hook_payload = tal(NULL, struct peer_connected_hook_payload);
hook_payload->ld = ld;
hook_payload->error = NULL;
if (!fromwire_connectd_peer_connected(hook_payload, msg,
&id, &connectd_counter,
&hook_payload->addr,
&hook_payload->remote_addr,
&hook_payload->incoming,
&their_features))
fatal("Connectd gave bad CONNECT_PEER_CONNECTED message %s",
tal_hex(msg, msg));
/* When a peer disconnects, we give subds time to clean themselves up
* (this lets connectd ensure they've seen the final messages). But
* now it's reconnected, we've gotta force them out. */
peer_channels_cleanup(ld, &id);
/* If we're already dealing with this peer, hand off to correct
* subdaemon. Otherwise, we'll hand to openingd to wait there. */
peer = peer_by_id(ld, &id);
if (!peer)
peer = new_peer(ld, 0, &id, &hook_payload->addr,
take(their_features), hook_payload->incoming);
else {
tal_free(peer->their_features);
peer->their_features = tal_steal(peer, their_features);
}
/* We track this, because messages can race between connectd and us.
* For example, we could tell it to attach a subd, but it's actually
* already reconnected: we would tell it again when we read the
* "peer_connected" message, and it would get upset (plus, our first
* subd wouldn't die as expected. So we echo this back to connectd
* on peer commands, and it knows to ignore if it's wrong. */
peer->connectd_counter = connectd_counter;
/* We mark peer in "connecting" state until hooks have passed. */
assert(peer->connected == PEER_DISCONNECTED);
peer->connected = PEER_CONNECTING;
/* Update peer address and direction */
peer->addr = hook_payload->addr;
peer->connected_incoming = hook_payload->incoming;
if (peer->remote_addr)
tal_free(peer->remote_addr);
peer->remote_addr = NULL;
hook_payload->peer_id = id;
/* If there's a connect command, use its id as basis for hook id */
cmd_id = connect_any_cmd_id(tmpctx, ld, peer);
/* Log and update remote_addr for Nat/IP discovery. */
if (hook_payload->remote_addr) {
log_peer_debug(ld->log, &id, "Peer says it sees our address as: %s",
fmt_wireaddr(tmpctx, hook_payload->remote_addr));
peer->remote_addr = tal_dup(peer, struct wireaddr,
hook_payload->remote_addr);
/* Currently only from peers we have a channel with, until we
* do stuff like probing for remote_addr to a random node. */
if (!list_empty(&peer->channels))
update_remote_addr(ld, hook_payload->remote_addr, id);
}
plugin_hook_call_peer_connected(ld, cmd_id, hook_payload);
}
/* connectd tells us a peer has a message and we've not already attached
* a subd. Normally this is a race, but it happens for real when opening
* a new channel, or referring to a channel we no longer want to talk to
* it about. */
void peer_spoke(struct lightningd *ld, const u8 *msg)
{
struct node_id id;
u16 msgtype;
u64 connectd_counter;
struct channel *channel;
struct channel_id channel_id;
struct peer *peer;
bool dual_fund;
u8 *error;
int fds[2];
char *errmsg;
if (!fromwire_connectd_peer_spoke(msg, msg, &id, &connectd_counter, &msgtype, &channel_id, &errmsg))
fatal("Connectd gave bad CONNECTD_PEER_SPOKE message %s",
tal_hex(msg, msg));
/* We must know it, and it must be the right connectd_id */
peer = peer_by_id(ld, &id);
assert(peer->connectd_counter == connectd_counter);
/* Do we know what channel they're talking about? */
channel = find_channel_by_id(peer, &channel_id);
if (channel) {
/* If we have a canned error for this channel, send it now */
if (channel->error) {
error = channel->error;
goto send_error;
}
if (channel_state_wants_peercomms(channel->state)) {
/* If they send an error, handle it immediately. */
if (errmsg) {
channel_fail_permanent(channel, REASON_REMOTE,
"They sent %s", errmsg);
return;
}
/* If channel is active there are two possibilities:
* 1. We have started subd, but channeld hasn't processed
* the connectd_peer_connect_subd message yet.
* 2. subd exited */
if (channel->owner) {
/* We raced... */
return;
}
log_debug(channel->log, "channel already active");
if (channel->state == DUALOPEND_AWAITING_LOCKIN) {
if (socketpair(AF_LOCAL, SOCK_STREAM, 0, fds) != 0) {
log_broken(ld->log,
"Failed to create socketpair: %s",
strerror(errno));
error = towire_warningfmt(tmpctx, &channel_id,
"Trouble in paradise?");
goto send_error;
}
if (peer_restart_dualopend(peer, new_peer_fd(tmpctx, fds[0]), channel, false))
goto tell_connectd;
/* FIXME: Send informative error? */
close(fds[1]);
}
return;
}
if (msgtype == WIRE_CHANNEL_REESTABLISH) {
log_debug(channel->log,
"Reestablish on %s channel: using channeld to reply",
channel_state_name(channel));
if (socketpair(AF_LOCAL, SOCK_STREAM, 0, fds) != 0) {
log_broken(channel->log,
"Failed to create socketpair: %s",
strerror(errno));
error = towire_warningfmt(tmpctx, &channel->cid,
"Trouble in paradise?");
goto send_error;
}
if (peer_start_channeld(channel, new_peer_fd(tmpctx, fds[0]), NULL, true, true)) {
goto tell_connectd;
}
/* FIXME: Send informative error? */
close(fds[1]);
return;
}
/* Send generic error. */
error = towire_errorfmt(tmpctx, &channel_id,
"channel in state %s",
channel_state_name(channel));
goto send_error;
}
dual_fund = feature_negotiated(ld->our_features,
peer->their_features,
OPT_DUAL_FUND);
/* OK, it's an unknown channel. Create a new one if they're trying. */
switch (msgtype) {
case WIRE_OPEN_CHANNEL:
if (dual_fund) {
error = towire_errorfmt(tmpctx, &channel_id,
"OPT_DUAL_FUND: cannot use open_channel");
goto send_error;
}
if (peer->uncommitted_channel) {
error = towire_errorfmt(tmpctx, &channel_id,
"Multiple simulteneous opens not supported");
goto send_error;
}
peer->uncommitted_channel = new_uncommitted_channel(peer);
peer->uncommitted_channel->cid = channel_id;
if (socketpair(AF_LOCAL, SOCK_STREAM, 0, fds) != 0) {
log_broken(ld->log,
"Failed to create socketpair: %s",
strerror(errno));
error = towire_warningfmt(tmpctx, &channel_id,
"Trouble in paradise?");
goto send_error;
}
if (peer_start_openingd(peer, new_peer_fd(tmpctx, fds[0]))) {
goto tell_connectd;
}
/* FIXME: Send informative error? */
close(fds[1]);
return;
case WIRE_OPEN_CHANNEL2:
if (!dual_fund) {
error = towire_errorfmt(tmpctx, &channel_id,
"Didn't negotiate OPT_DUAL_FUND: cannot use open_channel2");
goto send_error;
}
channel = new_unsaved_channel(peer,
peer->ld->config.fee_base,
peer->ld->config.fee_per_satoshi);
channel->cid = channel_id;
if (socketpair(AF_LOCAL, SOCK_STREAM, 0, fds) != 0) {
log_broken(ld->log,
"Failed to create socketpair: %s",
strerror(errno));
error = towire_warningfmt(tmpctx, &channel_id,
"Trouble in paradise?");
goto send_error;
}
if (peer_start_dualopend(peer, new_peer_fd(tmpctx, fds[0]), channel))
goto tell_connectd;
/* FIXME: Send informative error? */
close(fds[1]);
return;
}
/* Weird message? Log and reply with error. */
log_peer_unusual(ld->log, &peer->id,
"Unknown channel %s for %s",
type_to_string(tmpctx, struct channel_id,
&channel_id),
peer_wire_name(msgtype));
error = towire_errorfmt(tmpctx, &channel_id,
"Unknown channel for %s", peer_wire_name(msgtype));
send_error:
log_peer_debug(ld->log, &peer->id, "Telling connectd to send error %s",
tal_hex(tmpctx, error));
/* Get connectd to send error and close. */
subd_send_msg(ld->connectd,
take(towire_connectd_peer_final_msg(NULL, &peer->id,
peer->connectd_counter,
error)));
return;
tell_connectd:
subd_send_msg(ld->connectd,
take(towire_connectd_peer_connect_subd(NULL, &id,
peer->connectd_counter,
&channel_id)));
subd_send_fd(ld->connectd, fds[1]);
}
struct disconnect_command {
struct list_node list;
/* Command structure. This is the parent of the close command. */
struct command *cmd;
/* node being disconnected. */
struct node_id id;
};
static void destroy_disconnect_command(struct disconnect_command *dc)
{
list_del(&dc->list);
}
void peer_disconnect_done(struct lightningd *ld, const u8 *msg)
{
struct node_id id;
u64 connectd_counter;
struct disconnect_command *i, *next;
struct peer *p;
if (!fromwire_connectd_peer_disconnect_done(msg, &id, &connectd_counter))
fatal("Connectd gave bad PEER_DISCONNECT_DONE message %s",
tal_hex(msg, msg));
/* If we still have peer, it's disconnected now */
/* FIXME: We should keep peers until it tells us they're disconnected,
* and not free when no more channels. */
p = peer_by_id(ld, &id);
if (p) {
assert(p->connectd_counter == connectd_counter);
log_peer_debug(ld->log, &id, "peer_disconnect_done");
p->connected = PEER_DISCONNECTED;
}
/* If you were trying to connect, it failed. */
connect_failed_disconnect(ld, &id,
p && !p->connected_incoming ? &p->addr : NULL);
/* Fire off plugin notifications */
notify_disconnect(ld, &id);
/* Wake any disconnect commands (removes self from list) */
list_for_each_safe(&ld->disconnect_commands, i, next, list) {
if (!node_id_eq(&i->id, &id))
continue;
was_pending(command_success(i->cmd,
json_stream_success(i->cmd)));
}
/* If connection was only thing keeping it, this will delete it. */
if (p)
maybe_delete_peer(p);
}
void update_channel_from_inflight(struct lightningd *ld,
struct channel *channel,
const struct channel_inflight *inflight)
{
struct wally_psbt *psbt_copy;
channel->funding = inflight->funding->outpoint;
channel->funding_sats = inflight->funding->total_funds;
channel->our_funds = inflight->funding->our_funds;
if (!amount_sat_add_sat_s64(&channel->our_funds, channel->our_funds,
inflight->funding->splice_amnt)) {
channel_fail_permanent(channel,
REASON_LOCAL,
"Updaing channel view for splice causes"
" an invalid satoshi amount wrapping,"
" channel: %s, initial funds: %s, splice"
" banace change: %s",
type_to_string(tmpctx, struct channel_id,
&channel->cid),
type_to_string(tmpctx, struct amount_sat,
&channel->our_funds),
inflight->funding->splice_amnt);
}
/* Lease infos ! */
channel->lease_expiry = inflight->lease_expiry;
channel->push = inflight->lease_fee;
tal_free(channel->lease_commit_sig);
channel->lease_commit_sig
= tal_dup_or_null(channel, secp256k1_ecdsa_signature, inflight->lease_commit_sig);
channel->lease_chan_max_msat = inflight->lease_chan_max_msat;
channel->lease_chan_max_ppt = inflight->lease_chan_max_ppt;
tal_free(channel->blockheight_states);
channel->blockheight_states = new_height_states(channel,
channel->opener,
&inflight->lease_blockheight_start);
/* Make a 'clone' of this tx */
psbt_copy = clone_psbt(channel, inflight->last_tx->psbt);
channel_set_last_tx(channel,
bitcoin_tx_with_psbt(channel, psbt_copy),
&inflight->last_sig);
/* Update the reserve */
channel_update_reserve(channel,
&channel->channel_info.their_config,
inflight->funding->total_funds);
wallet_channel_save(ld->wallet, channel);
}
static enum watch_result funding_depth_cb(struct lightningd *ld,
const struct bitcoin_txid *txid,
const struct bitcoin_tx *tx,
unsigned int depth,
struct channel *channel)
{
/* This is stub channel, we don't activate anything! */
if (is_stub_scid(channel->scid))
return DELETE_WATCH;
/* We only use this to watch the current funding tx */
assert(bitcoin_txid_eq(txid, &channel->funding.txid));
channel->depth = depth;
log_debug(channel->log, "Funding tx %s depth %u of %u",
type_to_string(tmpctx, struct bitcoin_txid, txid),
depth, channel->minimum_depth);
/* Reorged out? */
if (depth == 0) {
/* That's not entirely unexpected in early states */
switch (channel->state) {
case DUALOPEND_AWAITING_LOCKIN:
case DUALOPEND_OPEN_INIT:
case DUALOPEND_OPEN_COMMITTED:
/* Shouldn't be here! */
channel_internal_error(channel,
"Bad %s state: %s",
__func__,
channel_state_name(channel));
return DELETE_WATCH;
case CHANNELD_AWAITING_LOCKIN:
/* That's not entirely unexpected in early states */
log_debug(channel->log, "Funding tx %s reorganized out!",
type_to_string(tmpctx, struct bitcoin_txid, txid));
channel->scid = tal_free(channel->scid);
return KEEP_WATCHING;
/* But it's often Bad News in later states */
case CHANNELD_AWAITING_SPLICE:
case CHANNELD_NORMAL:
/* If we opened, or it's zero-conf, we trust them anyway. */
if (channel->opener == LOCAL
|| channel->minimum_depth == 0) {
const char *str;
str = tal_fmt(tmpctx,
"Funding tx %s reorganized out, but %s...",
type_to_string(tmpctx, struct bitcoin_txid, txid),
channel->opener == LOCAL ? "we opened it" : "zeroconf anyway");
/* Log even if not connected! */
if (!channel->owner)
log_info(channel->log, "%s", str);
channel_fail_transient(channel, true, "%s", str);
return KEEP_WATCHING;
}
/* fall thru */
case AWAITING_UNILATERAL:
case CHANNELD_SHUTTING_DOWN:
case CLOSINGD_SIGEXCHANGE:
case CLOSINGD_COMPLETE:
case FUNDING_SPEND_SEEN:
case ONCHAIN:
case CLOSED:
break;
}
channel_internal_error(channel,
"Funding transaction has been reorged out in state %s!",
channel_state_name(channel));
return KEEP_WATCHING;
}
if (!depthcb_update_scid(channel, txid, &channel->funding))
return DELETE_WATCH;
switch (channel->state) {
/* We should not be in the callback! */
case DUALOPEND_AWAITING_LOCKIN:
case DUALOPEND_OPEN_INIT:
case DUALOPEND_OPEN_COMMITTED:
abort();
case AWAITING_UNILATERAL:
case CHANNELD_SHUTTING_DOWN:
case CLOSINGD_SIGEXCHANGE:
case CLOSINGD_COMPLETE:
case FUNDING_SPEND_SEEN:
case ONCHAIN:
case CLOSED:
/* If not awaiting lockin/announce, it doesn't care any more */
log_debug(channel->log,
"Funding tx %s confirmed, but peer in state %s",
type_to_string(tmpctx, struct bitcoin_txid, txid),
channel_state_name(channel));
return DELETE_WATCH;
case CHANNELD_AWAITING_LOCKIN:
if (depth >= channel->minimum_depth
&& channel->remote_channel_ready) {
lockin_complete(channel, CHANNELD_AWAITING_LOCKIN);
}
/* Fall thru */
case CHANNELD_NORMAL:
case CHANNELD_AWAITING_SPLICE:
channeld_tell_depth(channel, txid, depth);
if (depth < ANNOUNCE_MIN_DEPTH || depth < channel->minimum_depth)
return KEEP_WATCHING;
/* Normal state and past announce depth? Stop bothering us! */
return DELETE_WATCH;
}
abort();
}
static enum watch_result funding_spent(struct channel *channel,
const struct bitcoin_tx *tx,
size_t inputnum UNUSED,
const struct block *block)
{
struct bitcoin_txid txid;
struct channel_inflight *inflight;
bitcoin_txid(tx, &txid);
/* If we're doing a splice, we expect the funding transaction to be
* spent, so don't freak out and just keep watching in that case */
list_for_each(&channel->inflights, inflight, list) {
if (bitcoin_txid_eq(&txid,
&inflight->funding->outpoint.txid)) {
/* splice_locked is a special flag that indicates this
* is a memory-only inflight acting as a race condition
* safeguard. When we see this, it is our responsability
* to clean up this memory-only inflight. */
if (inflight->splice_locked_memonly) {
tal_free(inflight);
return DELETE_WATCH;
}
return KEEP_WATCHING;
}
}
wallet_channeltxs_add(channel->peer->ld->wallet, channel,
WIRE_ONCHAIND_INIT, &txid, 0, block->height);
return onchaind_funding_spent(channel, tx, block->height);
}
void channel_watch_wrong_funding(struct lightningd *ld, struct channel *channel)
{
/* Watch the "wrong" funding too, in case we spend it. */
if (channel->shutdown_wrong_funding) {
watch_txo(channel, ld->topology, channel,
channel->shutdown_wrong_funding,
funding_spent);
}
}
void channel_watch_funding(struct lightningd *ld, struct channel *channel)
{
log_debug(channel->log, "Watching for funding txid: %s",
type_to_string(tmpctx, struct bitcoin_txid, &channel->funding.txid));
watch_txid(channel, ld->topology,
&channel->funding.txid, funding_depth_cb, channel);
tal_free(channel->funding_spend_watch);
channel->funding_spend_watch = watch_txo(channel, ld->topology, channel,
&channel->funding,
funding_spent);
channel_watch_wrong_funding(ld, channel);
}
static void json_add_peer(struct lightningd *ld,
struct json_stream *response,
struct peer *p,
const enum log_level *ll)
{
struct channel *channel;
u32 num_channels;
json_object_start(response, NULL);
json_add_node_id(response, "id", &p->id);
json_add_bool(response, "connected", p->connected == PEER_CONNECTED);
num_channels = 0;
list_for_each(&p->channels, channel, list)
num_channels++;
json_add_num(response, "num_channels", num_channels);
if (p->connected == PEER_CONNECTED) {
json_array_start(response, "netaddr");
json_add_string(response, NULL,
type_to_string(tmpctx,
struct wireaddr_internal,
&p->addr));
json_array_end(response);
/* If peer reports our IP remote_addr, add that here */
if (p->remote_addr)
json_add_string(response, "remote_addr",
fmt_wireaddr(response, p->remote_addr));
}
/* Note: If !PEER_CONNECTED, peer may use different features on reconnect */
json_add_hex_talarr(response, "features", p->their_features);
if (ld->deprecated_apis) {
json_array_start(response, "channels");
json_add_uncommitted_channel(response, p->uncommitted_channel, NULL);
list_for_each(&p->channels, channel, list) {
if (channel_state_uncommitted(channel->state))
json_add_unsaved_channel(response, channel, NULL);
else
json_add_channel(ld, response, NULL, channel, NULL);
}
json_array_end(response);
}
if (ll)
json_add_log(response, ld->log_book, &p->id, *ll);
json_object_end(response);
}
static struct command_result *json_listpeers(struct command *cmd,
const char *buffer,
const jsmntok_t *obj UNNEEDED,
const jsmntok_t *params)
{
enum log_level *ll;
struct node_id *specific_id;
struct peer *peer;
struct json_stream *response;
if (!param(cmd, buffer, params,
p_opt("id", param_node_id, &specific_id),
p_opt("level", param_loglevel, &ll),
NULL))
return command_param_failed();
response = json_stream_success(cmd);
json_array_start(response, "peers");
if (specific_id) {
peer = peer_by_id(cmd->ld, specific_id);
if (peer)
json_add_peer(cmd->ld, response, peer, ll);
} else {
struct peer_node_id_map_iter it;
for (peer = peer_node_id_map_first(cmd->ld->peers, &it);
peer;
peer = peer_node_id_map_next(cmd->ld->peers, &it)) {
json_add_peer(cmd->ld, response, peer, ll);
}
}
json_array_end(response);
return command_success(cmd, response);
}
static const struct json_command listpeers_command = {
"listpeers",
"network",
json_listpeers,
"Show current peers, if {level} is set, include logs for {id}"
};
/* Comment added to satisfice AUTODATA */
AUTODATA(json_command, &listpeers_command);
static void json_add_scb(struct command *cmd,
const char *fieldname,
struct json_stream *response,
struct channel *c)
{
u8 *scb = tal_arr(cmd, u8, 0);
towire_scb_chan(&scb, c->scb);
json_add_hex_talarr(response, fieldname,
scb);
}
/* This will return a SCB for all the channels currently loaded
* in the in-memory channel */
static struct command_result *json_staticbackup(struct command *cmd,
const char *buffer,
const jsmntok_t *obj UNNEEDED,
const jsmntok_t *params)
{
struct json_stream *response;
struct peer *peer;
struct channel *channel;
struct peer_node_id_map_iter it;
if (!param(cmd, buffer, params, NULL))
return command_param_failed();
response = json_stream_success(cmd);
json_array_start(response, "scb");
for (peer = peer_node_id_map_first(cmd->ld->peers, &it);
peer;
peer = peer_node_id_map_next(cmd->ld->peers, &it)) {
list_for_each(&peer->channels, channel, list){
if (!channel->scb)
continue;
json_add_scb(cmd, NULL, response, channel);
}
}
json_array_end(response);
return command_success(cmd, response);
}
static const struct json_command staticbackup_command = {
"staticbackup",
"backup",
json_staticbackup,
"Returns SCB of all the channels currently present in the DB"
};
/* Comment added to satisfice AUTODATA */
AUTODATA(json_command, &staticbackup_command);
static void json_add_peerchannels(struct lightningd *ld,
struct json_stream *response,
const struct peer *peer)
{
struct channel *channel;
json_add_uncommitted_channel(response, peer->uncommitted_channel, peer);
list_for_each(&peer->channels, channel, list) {
if (channel_state_uncommitted(channel->state))
json_add_unsaved_channel(response, channel, peer);
else
json_add_channel(ld, response, NULL, channel, peer);
}
}
static struct command_result *json_listpeerchannels(struct command *cmd,
const char *buffer,
const jsmntok_t *obj UNNEEDED,
const jsmntok_t *params)
{
struct node_id *peer_id;
struct peer *peer;
struct json_stream *response;
/* FIME: filter by status */
if (!param(cmd, buffer, params,
p_opt("id", param_node_id, &peer_id),
NULL))
return command_param_failed();
response = json_stream_success(cmd);
json_array_start(response, "channels");
if (peer_id) {
peer = peer_by_id(cmd->ld, peer_id);
if (peer)
json_add_peerchannels(cmd->ld, response, peer);
} else {
struct peer_node_id_map_iter it;
for (peer = peer_node_id_map_first(cmd->ld->peers, &it);
peer;
peer = peer_node_id_map_next(cmd->ld->peers, &it)) {
json_add_peerchannels(cmd->ld, response, peer);
}
}
json_array_end(response);
return command_success(cmd, response);
}
static const struct json_command listpeerchannels_command = {
"listpeerchannels",
"network",
json_listpeerchannels,
"Show channels with direct peers."
};
AUTODATA(json_command, &listpeerchannels_command);
struct command_result *
command_find_channel(struct command *cmd,
const char *name,
const char *buffer, const jsmntok_t *tok,
struct channel **channel)
{
struct lightningd *ld = cmd->ld;
struct channel_id cid;
struct short_channel_id scid;
struct peer *peer;
if (json_tok_channel_id(buffer, tok, &cid)) {
struct peer_node_id_map_iter it;
for (peer = peer_node_id_map_first(ld->peers, &it);
peer;
peer = peer_node_id_map_next(ld->peers, &it)) {
list_for_each(&peer->channels, (*channel), list) {
if (!channel_state_wants_peercomms((*channel)->state))
continue;
if (channel_id_eq(&(*channel)->cid, &cid))
return NULL;
}
}
return command_fail_badparam(cmd, name, buffer, tok,
"Channel id not found");
} else if (json_to_short_channel_id(buffer, tok, &scid)) {
*channel = any_channel_by_scid(ld, &scid, true);
if (!*channel)
return command_fail_badparam(cmd, name, buffer, tok,
"Short channel id not found");
return NULL;
} else {
return command_fail_badparam(cmd, name, buffer, tok,
"should be a channel ID or short channel ID");
}
}
static void setup_peer(struct peer *peer, u32 delay)
{
struct channel *channel;
struct channel_inflight *inflight;
struct lightningd *ld = peer->ld;
bool connect = false;
list_for_each(&peer->channels, channel, list) {
switch (channel->state) {
case DUALOPEND_OPEN_INIT:
case DUALOPEND_OPEN_COMMITTED:
/* Nothing to watch */
continue;
/* Normal cases where we watch funding */
case CHANNELD_AWAITING_LOCKIN:
case CHANNELD_NORMAL:
case CHANNELD_SHUTTING_DOWN:
case CLOSINGD_SIGEXCHANGE:
/* We still want to watch spend, to tell onchaind: */
case CLOSINGD_COMPLETE:
case AWAITING_UNILATERAL:
case FUNDING_SPEND_SEEN:
case ONCHAIN:
case CLOSED:
channel_watch_funding(ld, channel);
break;
/* We need to watch all inflights which may open channel */
case DUALOPEND_AWAITING_LOCKIN:
list_for_each(&channel->inflights, inflight, list)
watch_opening_inflight(ld, inflight);
break;
/* We need to watch all inflights which may splice */
case CHANNELD_AWAITING_SPLICE:
list_for_each(&channel->inflights, inflight, list)
watch_splice_inflight(ld, inflight);
break;
}
if (channel_state_wants_peercomms(channel->state))
connect = true;
}
/* Make sure connectd knows to try reconnecting. */
if (connect) {
/* To delay, make it seem like we just connected. */
if (delay > 0) {
peer->reconnect_delay = delay;
peer->last_connect_attempt = time_now();
}
try_reconnect(peer, peer, &peer->addr);
}
}
void setup_peers(struct lightningd *ld)
{
struct peer *p;
/* Avoid thundering herd: after first five, delay by 1 second. */
int delay = -5;
struct peer_node_id_map_iter it;
for (p = peer_node_id_map_first(ld->peers, &it);
p;
p = peer_node_id_map_next(ld->peers, &it)) {
setup_peer(p, delay > 0 ? delay : 0);
delay++;
}
}
/* Pull peers, channels and HTLCs from db, and wire them up. */
struct htlc_in_map *load_channels_from_wallet(struct lightningd *ld)
{
struct peer *peer;
struct htlc_in_map *unconnected_htlcs_in = tal(ld, struct htlc_in_map);
struct peer_node_id_map_iter it;
/* Load channels from database */
if (!wallet_init_channels(ld->wallet))
fatal("Could not load channels from the database");
/* First we load the incoming htlcs */
for (peer = peer_node_id_map_first(ld->peers, &it);
peer;
peer = peer_node_id_map_next(ld->peers, &it)) {
struct channel *channel;
list_for_each(&peer->channels, channel, list) {
if (!wallet_htlcs_load_in_for_channel(ld->wallet,
channel,
ld->htlcs_in)) {
fatal("could not load htlcs for channel");
}
}
}
/* Make a copy of the htlc_map: entries removed as they're matched */
htlc_in_map_copy(unconnected_htlcs_in, ld->htlcs_in);
/* Now we load the outgoing HTLCs, so we can connect them. */
for (peer = peer_node_id_map_first(ld->peers, &it);
peer;
peer = peer_node_id_map_next(ld->peers, &it)) {
struct channel *channel;
list_for_each(&peer->channels, channel, list) {
if (!wallet_htlcs_load_out_for_channel(ld->wallet,
channel,
ld->htlcs_out,
unconnected_htlcs_in)) {
fatal("could not load outgoing htlcs for channel");
}
}
}
#ifdef COMPAT_V061
fixup_htlcs_out(ld);
#endif /* COMPAT_V061 */
return unconnected_htlcs_in;
}
static struct command_result *param_peer(struct command *cmd,
const char *name,
const char *buffer,
const jsmntok_t *tok,
struct peer **peer)
{
struct node_id peerid;
if (!json_to_node_id(buffer, tok, &peerid))
return command_fail_badparam(cmd, name, buffer, tok,
"invalid peer id");
*peer = peer_by_id(cmd->ld, &peerid);
if (!*peer)
return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
"Unknown peer '%.*s'",
tok->end - tok->start,
buffer + tok->start);
return NULL;
}
static struct command_result *json_disconnect(struct command *cmd,
const char *buffer,
const jsmntok_t *obj UNNEEDED,
const jsmntok_t *params)
{
struct disconnect_command *dc;
struct peer *peer;
struct channel *channel;
bool *force;
if (!param(cmd, buffer, params,
p_req("id", param_peer, &peer),
p_opt_def("force", param_bool, &force, false),
NULL))
return command_param_failed();
if (peer->connected == PEER_DISCONNECTED) {
return command_fail(cmd, LIGHTNINGD, "Peer not connected");
}
channel = peer_any_channel(peer, channel_state_wants_peercomms, NULL);
if (channel && !*force) {
return command_fail(cmd, LIGHTNINGD,
"Peer has (at least one) channel in state %s",
channel_state_name(channel));
}
force_peer_disconnect(cmd->ld, peer, "disconnect command");
/* Connectd tells us when it's finally disconnected */
dc = tal(cmd, struct disconnect_command);
dc->cmd = cmd;
dc->id = peer->id;
list_add_tail(&cmd->ld->disconnect_commands, &dc->list);
tal_add_destructor(dc, destroy_disconnect_command);
return command_still_pending(cmd);
}
static const struct json_command disconnect_command = {
"disconnect",
"network",
json_disconnect,
"Disconnect from {id} that has previously been connected to using connect; with {force} set, even if it has a current channel"
};
AUTODATA(json_command, &disconnect_command);
static struct command_result *json_getinfo(struct command *cmd,
const char *buffer,
const jsmntok_t *obj UNNEEDED,
const jsmntok_t *params)
{
struct json_stream *response;
struct peer *peer;
struct channel *channel;
unsigned int pending_channels = 0, active_channels = 0,
inactive_channels = 0, num_peers = 0;
size_t count_announceable;
struct peer_node_id_map_iter it;
if (!param(cmd, buffer, params, NULL))
return command_param_failed();
response = json_stream_success(cmd);
json_add_node_id(response, "id", &cmd->ld->id);
json_add_string(response, "alias", (const char *)cmd->ld->alias);
json_add_hex_talarr(response, "color", cmd->ld->rgb);
/* Add some peer and channel stats */
for (peer = peer_node_id_map_first(cmd->ld->peers, &it);
peer;
peer = peer_node_id_map_next(cmd->ld->peers, &it)) {
num_peers++;
list_for_each(&peer->channels, channel, list) {
switch (channel->state) {
case CHANNELD_AWAITING_LOCKIN:
case DUALOPEND_OPEN_INIT:
case DUALOPEND_OPEN_COMMITTED:
case DUALOPEND_AWAITING_LOCKIN:
pending_channels++;
continue;
case CHANNELD_AWAITING_SPLICE:
case CHANNELD_SHUTTING_DOWN:
case CHANNELD_NORMAL:
case CLOSINGD_SIGEXCHANGE:
active_channels++;
continue;
case CLOSINGD_COMPLETE:
case AWAITING_UNILATERAL:
case FUNDING_SPEND_SEEN:
case ONCHAIN:
case CLOSED:
inactive_channels++;
continue;
}
abort();
}
}
json_add_num(response, "num_peers", num_peers);
json_add_num(response, "num_pending_channels", pending_channels);
json_add_num(response, "num_active_channels", active_channels);
json_add_num(response, "num_inactive_channels", inactive_channels);
/* Add network info */
json_array_start(response, "address");
if (cmd->ld->listen) {
/* These are the addresses we're announcing */
count_announceable = tal_count(cmd->ld->announceable);
for (size_t i = 0; i < count_announceable; i++)
json_add_address(response, NULL, cmd->ld->announceable+i);
/* Add discovered IPs if we announce them.
* Also see `create_node_announcement` in `gossip_generation.c`. */
if ((cmd->ld->config.ip_discovery == OPT_AUTOBOOL_AUTO && count_announceable == 0) ||
cmd->ld->config.ip_discovery == OPT_AUTOBOOL_TRUE) {
if (cmd->ld->discovered_ip_v4 != NULL &&
!wireaddr_arr_contains(
cmd->ld->announceable,
cmd->ld->discovered_ip_v4))
json_add_address(response, NULL,
cmd->ld->discovered_ip_v4);
if (cmd->ld->discovered_ip_v6 != NULL &&
!wireaddr_arr_contains(
cmd->ld->announceable,
cmd->ld->discovered_ip_v6))
json_add_address(response, NULL,
cmd->ld->discovered_ip_v6);
}
json_array_end(response);
/* This is what we're actually bound to. */
json_array_start(response, "binding");
for (size_t i = 0; i < tal_count(cmd->ld->binding); i++)
json_add_address_internal(response, NULL,
cmd->ld->binding+i);
}
json_array_end(response);
json_add_string(response, "version", version());
/* If we're still syncing, put the height we're up to here, so
* they can see progress! Otherwise use the height gossipd knows
* about, so tests work properly. */
if (!topology_synced(cmd->ld->topology)) {
json_add_num(response, "blockheight",
get_block_height(cmd->ld->topology));
} else {
json_add_num(response, "blockheight",
cmd->ld->gossip_blockheight);
}
json_add_string(response, "network", chainparams->network_name);
json_add_amount_msat(response,
"fees_collected_msat",
wallet_total_forward_fees(cmd->ld->wallet));
json_add_string(response, "lightning-dir", cmd->ld->config_netdir);
if (!cmd->ld->topology->bitcoind->synced)
json_add_string(response, "warning_bitcoind_sync",
"Bitcoind is not up-to-date with network.");
else if (!topology_synced(cmd->ld->topology))
json_add_string(response, "warning_lightningd_sync",
"Still loading latest blocks from bitcoind.");
u8 **bits = cmd->ld->our_features->bits;
json_object_start(response, "our_features");
json_add_hex_talarr(response, "init",
featurebits_or(cmd,
bits[INIT_FEATURE],
bits[GLOBAL_INIT_FEATURE]));
json_add_hex_talarr(response, "node", bits[NODE_ANNOUNCE_FEATURE]);
json_add_hex_talarr(response, "channel", bits[CHANNEL_FEATURE]);
json_add_hex_talarr(response, "invoice", bits[BOLT11_FEATURE]);
json_object_end(response);
return command_success(cmd, response);
}
static const struct json_command getinfo_command = {
"getinfo",
"utility",
json_getinfo,
"Show information about this node"
};
AUTODATA(json_command, &getinfo_command);
/* Wait for at least a specific blockheight, then return, or time out. */
struct waitblockheight_waiter {
/* struct lightningd::waitblockheight_commands. */
struct list_node list;
/* Command structure. This is the parent of the close command. */
struct command *cmd;
/* The block height being waited for. */
u32 block_height;
/* Whether we have been removed from the list. */
bool removed;
};
/* Completes a pending waitblockheight. */
static struct command_result *
waitblockheight_complete(struct command *cmd,
u32 block_height)
{
struct json_stream *response;
response = json_stream_success(cmd);
json_add_num(response, "blockheight", block_height);
return command_success(cmd, response);
}
/* Called when command is destroyed without being resolved. */
static void
destroy_waitblockheight_waiter(struct waitblockheight_waiter *w)
{
if (!w->removed)
list_del(&w->list);
}
/* Called on timeout. */
static void
timeout_waitblockheight_waiter(struct waitblockheight_waiter *w)
{
list_del(&w->list);
w->removed = true;
tal_steal(tmpctx, w);
was_pending(command_fail(w->cmd, WAIT_TIMEOUT,
"Timed out."));
}
/* Called by lightningd at each new block. */
void waitblockheight_notify_new_block(struct lightningd *ld,
u32 block_height)
{
struct waitblockheight_waiter *w, *n;
char *to_delete = tal(NULL, char);
/* Use safe since we could resolve commands and thus
* trigger removal of list elements.
*/
list_for_each_safe(&ld->waitblockheight_commands, w, n, list) {
/* Skip commands that have not been reached yet. */
if (w->block_height > block_height)
continue;
list_del(&w->list);
w->removed = true;
tal_steal(to_delete, w);
was_pending(waitblockheight_complete(w->cmd,
block_height));
}
tal_free(to_delete);
}
static struct command_result *json_waitblockheight(struct command *cmd,
const char *buffer,
const jsmntok_t *obj,
const jsmntok_t *params)
{
unsigned int *target_block_height;
u32 block_height;
unsigned int *timeout;
struct waitblockheight_waiter *w;
if (!param(cmd, buffer, params,
p_req("blockheight", param_number, &target_block_height),
p_opt_def("timeout", param_number, &timeout, 60),
NULL))
return command_param_failed();
/* Check if already reached anyway. */
block_height = get_block_height(cmd->ld->topology);
if (*target_block_height <= block_height)
return waitblockheight_complete(cmd, block_height);
/* Create a new waitblockheight command. */
w = tal(cmd, struct waitblockheight_waiter);
tal_add_destructor(w, &destroy_waitblockheight_waiter);
list_add(&cmd->ld->waitblockheight_commands, &w->list);
w->cmd = cmd;
w->block_height = *target_block_height;
w->removed = false;
/* Install the timeout. */
(void) new_reltimer(cmd->ld->timers, w, time_from_sec(*timeout),
&timeout_waitblockheight_waiter, w);
return command_still_pending(cmd);
}
static const struct json_command waitblockheight_command = {
"waitblockheight",
"utility",
&json_waitblockheight,
"Wait for the blockchain to reach {blockheight}, up to "
"{timeout} seconds."
};
AUTODATA(json_command, &waitblockheight_command);
static bool channel_state_can_setchannel(enum channel_state state)
{
switch (state) {
case CHANNELD_NORMAL:
case CHANNELD_AWAITING_SPLICE:
case CHANNELD_AWAITING_LOCKIN:
case DUALOPEND_AWAITING_LOCKIN:
return true;
case DUALOPEND_OPEN_INIT:
case DUALOPEND_OPEN_COMMITTED:
case CLOSINGD_SIGEXCHANGE:
case CHANNELD_SHUTTING_DOWN:
case CLOSINGD_COMPLETE:
case AWAITING_UNILATERAL:
case FUNDING_SPEND_SEEN:
case ONCHAIN:
case CLOSED:
return false;
}
abort();
}
static struct command_result *param_channel_or_all(struct command *cmd,
const char *name,
const char *buffer,
const jsmntok_t *tok,
struct channel ***channels)
{
struct command_result *res;
struct peer *peer;
struct channel *channel;
*channels = tal_arr(cmd, struct channel *, 0);
/* early return the easy case */
if (json_tok_streq(buffer, tok, "all")) {
*channels = tal_free(*channels);
return NULL;
}
/* Find channels by peer_id */
peer = peer_from_json(cmd->ld, buffer, tok);
if (peer) {
list_for_each(&peer->channels, channel, list) {
if (channel_state_can_setchannel(channel->state))
tal_arr_expand(channels, channel);
}
if (tal_count(*channels) == 0)
return command_fail(cmd, LIGHTNINGD,
"Could not find any active channels of peer with that id");
return NULL;
}
/* Find channel by id or scid */
res = command_find_channel(cmd, name, buffer, tok, &channel);
if (res)
return res;
/* check channel is found and in valid state */
if (!channel_state_can_setchannel(channel->state))
return command_fail_badparam(cmd, name, buffer, tok,
tal_fmt(tmpctx, "Channel in state %s",
channel_state_name(channel)));
tal_arr_expand(channels, channel);
return NULL;
}
/* Fee base is a u32, but it's convenient to let them specify it using
* msat etc. suffix. */
static struct command_result *param_msat_u32(struct command *cmd,
const char *name,
const char *buffer,
const jsmntok_t *tok,
u32 **num)
{
struct amount_msat *msat;
struct command_result *res;
/* Parse just like an msat. */
res = param_msat(cmd, name, buffer, tok, &msat);
if (res)
return res;
*num = tal(cmd, u32);
if (!amount_msat_to_u32(*msat, *num)) {
return command_fail_badparam(cmd, name, buffer, tok,
"exceeds u32 max");
}
return NULL;
}
static void set_channel_config(struct command *cmd, struct channel *channel,
u32 *base,
u32 *ppm,
struct amount_msat *htlc_min,
struct amount_msat *htlc_max,
u32 delaysecs,
bool *ignore_fee_limits,
struct json_stream *response)
{
bool warn_cannot_set_min = false, warn_cannot_set_max = false;
/* We only need to defer values if we *increase* fees (or drop
* max, increase min); we always allow users to overpay fees. */
if ((base && *base > channel->feerate_base)
|| (ppm && *ppm > channel->feerate_ppm)
|| (htlc_min
&& amount_msat_greater(*htlc_min, channel->htlc_minimum_msat))
|| (htlc_max
&& amount_msat_less(*htlc_max, channel->htlc_maximum_msat))) {
channel->old_feerate_timeout
= timeabs_add(time_now(), time_from_sec(delaysecs));
channel->old_feerate_base = channel->feerate_base;
channel->old_feerate_ppm = channel->feerate_ppm;
channel->old_htlc_minimum_msat = channel->htlc_minimum_msat;
channel->old_htlc_maximum_msat = channel->htlc_maximum_msat;
}
/* set new values */
if (base)
channel->feerate_base = *base;
if (ppm)
channel->feerate_ppm = *ppm;
if (htlc_min) {
struct amount_msat actual_min;
/* We can't send something they'll refuse: check that here. */
actual_min = channel->channel_info.their_config.htlc_minimum;
if (amount_msat_less(*htlc_min, actual_min)) {
warn_cannot_set_min = true;
channel->htlc_minimum_msat = actual_min;
} else
channel->htlc_minimum_msat = *htlc_min;
}
if (htlc_max) {
struct amount_msat actual_max;
/* Can't set it greater than actual capacity. */
actual_max = htlc_max_possible_send(channel);
if (amount_msat_greater(*htlc_max, actual_max)) {
warn_cannot_set_max = true;
channel->htlc_maximum_msat = actual_max;
} else
channel->htlc_maximum_msat = *htlc_max;
}
if (ignore_fee_limits)
channel->ignore_fee_limits = *ignore_fee_limits;
/* tell channeld to make a send_channel_update */
if (channel->owner && streq(channel->owner->name, "channeld")) {
subd_send_msg(channel->owner,
take(towire_channeld_config_channel(NULL, base, ppm,
htlc_min, htlc_max)));
/* Tell it about the new acceptable feerates */
if (ignore_fee_limits)
channel_update_feerates(cmd->ld, channel);
}
/* save values to database */
wallet_channel_save(cmd->ld->wallet, channel);
/* write JSON response entry */
json_object_start(response, NULL);
json_add_node_id(response, "peer_id", &channel->peer->id);
json_add_string(response, "channel_id",
type_to_string(tmpctx, struct channel_id, &channel->cid));
if (channel->scid)
json_add_short_channel_id(response, "short_channel_id", channel->scid);
json_add_amount_msat(response, "fee_base_msat",
amount_msat(channel->feerate_base));
json_add_u32(response, "fee_proportional_millionths",
channel->feerate_ppm);
json_add_amount_msat(response,
"minimum_htlc_out_msat",
channel->htlc_minimum_msat);
if (warn_cannot_set_min)
json_add_string(response, "warning_htlcmin_too_low",
"Set minimum_htlc_out_msat to minimum allowed by peer");
json_add_amount_msat(response,
"maximum_htlc_out_msat",
channel->htlc_maximum_msat);
json_add_bool(response, "ignore_fee_limits", channel->ignore_fee_limits);
if (warn_cannot_set_max)
json_add_string(response, "warning_htlcmax_too_high",
"Set maximum_htlc_out_msat to maximum possible in channel");
json_object_end(response);
}
static struct command_result *json_setchannel(struct command *cmd,
const char *buffer,
const jsmntok_t *obj UNNEEDED,
const jsmntok_t *params)
{
struct json_stream *response;
struct peer *peer;
struct channel **channels;
u32 *base, *ppm, *delaysecs;
struct amount_msat *htlc_min, *htlc_max;
bool *ignore_fee_limits;
/* Parse the JSON command */
if (!param(cmd, buffer, params,
p_req("id", param_channel_or_all, &channels),
p_opt("feebase", param_msat_u32, &base),
p_opt("feeppm", param_number, &ppm),
p_opt("htlcmin", param_msat, &htlc_min),
p_opt("htlcmax", param_msat, &htlc_max),
p_opt_def("enforcedelay", param_number, &delaysecs, 600),
p_opt("ignorefeelimits", param_bool, &ignore_fee_limits),
NULL))
return command_param_failed();
/* Prevent obviously incorrect things! */
if (htlc_min && htlc_max
&& amount_msat_less(*htlc_max, *htlc_min)) {
return command_fail(cmd, LIGHTNINGD,
"htlcmax cannot be less than htlcmin");
}
/* Open JSON response object for later iteration */
response = json_stream_success(cmd);
json_array_start(response, "channels");
/* If the users requested 'all' channels we need to iterate */
if (channels == NULL) {
struct peer_node_id_map_iter it;
for (peer = peer_node_id_map_first(cmd->ld->peers, &it);
peer;
peer = peer_node_id_map_next(cmd->ld->peers, &it)) {
struct channel *channel;
list_for_each(&peer->channels, channel, list) {
if (!channel_state_can_setchannel(channel->state))
continue;
set_channel_config(cmd, channel, base, ppm,
htlc_min, htlc_max,
*delaysecs, ignore_fee_limits,
response);
}
}
/* single peer should be updated */
} else {
for (size_t i = 0; i < tal_count(channels); i++) {
set_channel_config(cmd, channels[i], base, ppm,
htlc_min, htlc_max,
*delaysecs, ignore_fee_limits,
response);
}
}
/* Close and return response */
json_array_end(response);
return command_success(cmd, response);
}
static const struct json_command setchannel_command = {
"setchannel",
"channels",
json_setchannel,
"Sets fees and/or htlc_max for channel with {id} "
"(either peer ID, channel ID, short channel ID or 'all'). "
"If {feebase}, {feeppm} or {htlcmax} is missing, it is unchanged."
"{base} can also be defined in other units, for example '1sat'. "
"If {id} is 'all', the fees will be applied for all channels. "
};
AUTODATA(json_command, &setchannel_command);
/* dev hack, don't use for real interfaces, which have to handle channel ids, or multiple channels */
static struct command_result *param_dev_channel(struct command *cmd,
const char *name,
const char *buffer,
const jsmntok_t *tok,
struct channel **channel)
{
struct peer *peer;
struct command_result *res;
bool more_than_one;
res = param_peer(cmd, name, buffer, tok, &peer);
if (res)
return res;
*channel = peer_any_channel(peer, channel_state_wants_peercomms, &more_than_one);
if (!*channel)
return command_fail_badparam(cmd, name, buffer, tok,
"No channel with that peer");
if (more_than_one)
return command_fail_badparam(cmd, name, buffer, tok,
"More than one channel with that peer");
return NULL;
}
static struct command_result *json_sign_last_tx(struct command *cmd,
const char *buffer,
const jsmntok_t *obj UNNEEDED,
const jsmntok_t *params)
{
struct json_stream *response;
struct channel *channel;
struct bitcoin_tx *tx;
if (!param(cmd, buffer, params,
p_req("id", param_dev_channel, &channel),
NULL))
return command_param_failed();
response = json_stream_success(cmd);
log_debug(channel->log, "dev-sign-last-tx: signing tx with %zu outputs",
channel->last_tx->wtx->num_outputs);
tx = sign_last_tx(cmd, channel, channel->last_tx, &channel->last_sig);
json_add_tx(response, "tx", tx);
/* If we've got inflights, return them */
if (!list_empty(&channel->inflights)) {
struct channel_inflight *inflight;
json_array_start(response, "inflights");
list_for_each(&channel->inflights, inflight, list) {
tx = sign_last_tx(cmd, channel, inflight->last_tx,
&inflight->last_sig);
json_object_start(response, NULL);
json_add_txid(response, "funding_txid",
&inflight->funding->outpoint.txid);
json_add_tx(response, "tx", tx);
json_object_end(response);
}
json_array_end(response);
}
return command_success(cmd, response);
}
static const struct json_command dev_sign_last_tx = {
"dev-sign-last-tx",
"developer",
json_sign_last_tx,
"Sign and show the last commitment transaction with peer {id}",
.dev_only = true,
};
AUTODATA(json_command, &dev_sign_last_tx);
static struct command_result *json_dev_fail(struct command *cmd,
const char *buffer,
const jsmntok_t *obj UNNEEDED,
const jsmntok_t *params)
{
struct channel *channel;
if (!param(cmd, buffer, params,
p_req("id", param_dev_channel, &channel),
NULL))
return command_param_failed();
channel_fail_permanent(channel,
REASON_USER,
"Failing due to dev-fail command");
return command_success(cmd, json_stream_success(cmd));
}
static const struct json_command dev_fail_command = {
"dev-fail",
"developer",
json_dev_fail,
"Fail with peer {id}",
.dev_only = true,
};
AUTODATA(json_command, &dev_fail_command);
static void dev_reenable_commit_finished(struct subd *channeld UNUSED,
const u8 *resp UNUSED,
const int *fds UNUSED,
struct command *cmd)
{
was_pending(command_success(cmd, json_stream_success(cmd)));
}
static struct command_result *json_dev_reenable_commit(struct command *cmd,
const char *buffer,
const jsmntok_t *obj UNNEEDED,
const jsmntok_t *params)
{
u8 *msg;
struct channel *channel;
if (!param(cmd, buffer, params,
p_req("id", param_dev_channel, &channel),
NULL))
return command_param_failed();
if (!channel->owner) {
return command_fail(cmd, LIGHTNINGD,
"Peer has no owner");
}
if (!streq(channel->owner->name, "channeld")) {
return command_fail(cmd, LIGHTNINGD,
"Peer owned by %s", channel->owner->name);
}
msg = towire_channeld_dev_reenable_commit(channel);
subd_req(channel, channel->owner, take(msg), -1, 0,
dev_reenable_commit_finished, cmd);
return command_still_pending(cmd);
}
static const struct json_command dev_reenable_commit = {
"dev-reenable-commit",
"developer",
json_dev_reenable_commit,
"Re-enable the commit timer on peer {id}",
.dev_only = true,
};
AUTODATA(json_command, &dev_reenable_commit);
struct dev_forget_channel_cmd {
struct short_channel_id scid;
struct channel *channel;
bool force;
struct command *cmd;
};
static void process_dev_forget_channel(struct bitcoind *bitcoind UNUSED,
const struct bitcoin_tx_output *txout,
void *arg)
{
struct json_stream *response;
struct dev_forget_channel_cmd *forget = arg;
if (txout != NULL && !forget->force) {
was_pending(command_fail(forget->cmd, LIGHTNINGD,
"Cowardly refusing to forget channel with an "
"unspent funding output, if you know what "
"you're doing you can override with "
"`force=true`, otherwise consider `close` or "
"`dev-fail`! If you force and the channel "
"confirms we will not track the funds in the "
"channel"));
return;
}
response = json_stream_success(forget->cmd);
json_add_bool(response, "forced", forget->force);
json_add_bool(response, "funding_unspent", txout != NULL);
json_add_txid(response, "funding_txid", &forget->channel->funding.txid);
/* Set error so we don't try to reconnect. */
forget->channel->error = towire_errorfmt(forget->channel,
&forget->channel->cid,
"dev_forget_channel");
delete_channel(forget->channel);
was_pending(command_success(forget->cmd, response));
}
static struct command_result *json_dev_forget_channel(struct command *cmd,
const char *buffer,
const jsmntok_t *obj UNNEEDED,
const jsmntok_t *params)
{
struct peer *peer;
struct channel *channel;
struct short_channel_id *scid;
struct channel_id *find_cid;
struct dev_forget_channel_cmd *forget = tal(cmd, struct dev_forget_channel_cmd);
forget->cmd = cmd;
bool *force;
if (!param(cmd, buffer, params,
p_req("id", param_peer, &peer),
p_opt("short_channel_id", param_short_channel_id, &scid),
p_opt("channel_id", param_channel_id, &find_cid),
p_opt_def("force", param_bool, &force, false),
NULL))
return command_param_failed();
forget->force = *force;
forget->channel = NULL;
list_for_each(&peer->channels, channel, list) {
/* Check for channel id first */
if (find_cid) {
if (!channel_id_eq(find_cid, &channel->cid))
continue;
}
if (scid) {
if (!channel->scid)
continue;
if (!short_channel_id_eq(channel->scid, scid))
continue;
}
if (forget->channel) {
return command_fail(cmd, LIGHTNINGD,
"Multiple channels:"
" please specify short_channel_id");
}
forget->channel = channel;
}
if (!forget->channel) {
return command_fail(cmd, LIGHTNINGD,
"No channels matching that peer_id%s",
scid ? " and that short_channel_id" : "");
}
if (channel_has_htlc_out(forget->channel) ||
channel_has_htlc_in(forget->channel)) {
return command_fail(cmd, LIGHTNINGD,
"This channel has HTLCs attached and it is "
"not safe to forget it. Please use `close` "
"or `dev-fail` instead.");
}
if (!channel_state_uncommitted(forget->channel->state))
bitcoind_getutxout(cmd->ld->topology->bitcoind,
&forget->channel->funding,
process_dev_forget_channel, forget);
return command_still_pending(cmd);
}
static const struct json_command dev_forget_channel_command = {
"dev-forget-channel",
"developer",
json_dev_forget_channel,
"Forget the channel with peer {id}, ignore UTXO check with {force}='true'.",
.verbose = "Forget the channel with peer {id}. Checks if the channel is still active by checking its funding transaction. Check can be ignored by setting {force} to 'true'",
.dev_only = true,
};
AUTODATA(json_command, &dev_forget_channel_command);
static void channeld_memleak_req_done(struct subd *channeld,
const u8 *msg, const int *fds UNUSED,
struct leak_detect *leaks)
{
bool found_leak;
if (!fromwire_channeld_dev_memleak_reply(msg, &found_leak))
fatal("Bad channel_dev_memleak");
if (found_leak)
report_subd_memleak(leaks, channeld);
}
static void onchaind_memleak_req_done(struct subd *onchaind,
const u8 *msg, const int *fds UNUSED,
struct leak_detect *leaks)
{
bool found_leak;
if (!fromwire_onchaind_dev_memleak_reply(msg, &found_leak))
fatal("Bad onchaind_dev_memleak");
if (found_leak)
report_subd_memleak(leaks, onchaind);
}
static void openingd_memleak_req_done(struct subd *open_daemon,
const u8 *msg, const int *fds UNUSED,
struct leak_detect *leaks)
{
bool found_leak;
if (!fromwire_openingd_dev_memleak_reply(msg, &found_leak))
fatal("Bad opening_dev_memleak");
if (found_leak)
report_subd_memleak(leaks, open_daemon);
}
static void dualopend_memleak_req_done(struct subd *dualopend,
const u8 *msg, const int *fds UNUSED,
struct leak_detect *leaks)
{
bool found_leak;
if (!fromwire_dualopend_dev_memleak_reply(msg, &found_leak))
fatal("Bad dualopend_dev_memleak");
if (found_leak)
report_subd_memleak(leaks, dualopend);
}
void peer_dev_memleak(struct lightningd *ld, struct leak_detect *leaks)
{
struct peer *p;
struct peer_node_id_map_iter it;
for (p = peer_node_id_map_first(ld->peers, &it);
p;
p = peer_node_id_map_next(ld->peers, &it)) {
struct channel *c;
if (p->uncommitted_channel && p->uncommitted_channel->open_daemon) {
struct subd *openingd = p->uncommitted_channel->open_daemon;
start_leak_request(subd_req(openingd, openingd,
take(towire_openingd_dev_memleak(NULL)),
-1, 0, openingd_memleak_req_done, leaks),
leaks);
}
list_for_each(&p->channels, c, list) {
if (!c->owner)
continue;
if (streq(c->owner->name, "channeld")) {
start_leak_request(subd_req(c, c->owner,
take(towire_channeld_dev_memleak(NULL)),
-1, 0, channeld_memleak_req_done, leaks),
leaks);
} else if (streq(c->owner->name, "onchaind")) {
start_leak_request(subd_req(c, c->owner,
take(towire_onchaind_dev_memleak(NULL)),
-1, 0, onchaind_memleak_req_done, leaks),
leaks);
} else if (streq(c->owner->name, "dualopend")) {
start_leak_request(subd_req(c, c->owner,
take(towire_dualopend_dev_memleak(NULL)),
-1, 0, dualopend_memleak_req_done, leaks),
leaks);
}
}
}
}
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