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options.c
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#include <ccan/array_size/array_size.h>
#include <ccan/err/err.h>
#include <ccan/json_escape/json_escape.h>
#include <ccan/mem/mem.h>
#include <ccan/opt/opt.h>
#include <ccan/opt/private.h>
#include <ccan/read_write_all/read_write_all.h>
#include <ccan/short_types/short_types.h>
#include <ccan/str/hex/hex.h>
#include <ccan/tal/path/path.h>
#include <ccan/tal/str/str.h>
#include <common/base64.h>
#include <common/channel_id.h>
#include <common/derive_basepoints.h>
#include <common/features.h>
#include <common/json_command.h>
#include <common/jsonrpc_errors.h>
#include <common/memleak.h>
#include <common/param.h>
#include <common/utils.h>
#include <common/version.h>
#include <common/wireaddr.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <lightningd/bitcoind.h>
#include <lightningd/chaintopology.h>
#include <lightningd/json.h>
#include <lightningd/jsonrpc.h>
#include <lightningd/lightningd.h>
#include <lightningd/log.h>
#include <lightningd/options.h>
#include <lightningd/plugin.h>
#include <lightningd/subd.h>
#include <sodium.h>
#include <stdio.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <termios.h>
#include <unistd.h>
#include <wire/wire.h>
/* Declare opt_add_addr here, because we we call opt_add_addr
* and opt_announce_addr vice versa
*/
static char *opt_add_addr(const char *arg, struct lightningd *ld);
/* FIXME: Put into ccan/time. */
#define TIME_FROM_SEC(sec) { { .tv_nsec = 0, .tv_sec = sec } }
#define TIME_FROM_MSEC(msec) \
{ { .tv_nsec = ((msec) % 1000) * 1000000, .tv_sec = (msec) / 1000 } }
static char *opt_set_u64(const char *arg, u64 *u)
{
char *endp;
unsigned long long l;
assert(arg != NULL);
/* This is how the manpage says to do it. Yech. */
errno = 0;
l = strtoull(arg, &endp, 0);
if (*endp || !arg[0])
return tal_fmt(NULL, "'%s' is not a number", arg);
*u = l;
if (errno || *u != l)
return tal_fmt(NULL, "'%s' is out of range", arg);
return NULL;
}
static char *opt_set_u32(const char *arg, u32 *u)
{
char *endp;
unsigned long l;
assert(arg != NULL);
/* This is how the manpage says to do it. Yech. */
errno = 0;
l = strtoul(arg, &endp, 0);
if (*endp || !arg[0])
return tal_fmt(NULL, "'%s' is not a number", arg);
*u = l;
if (errno || *u != l)
return tal_fmt(NULL, "'%s' is out of range", arg);
return NULL;
}
static char *opt_set_s32(const char *arg, s32 *u)
{
char *endp;
long l;
assert(arg != NULL);
/* This is how the manpage says to do it. Yech. */
errno = 0;
l = strtol(arg, &endp, 0);
if (*endp || !arg[0])
return tal_fmt(NULL, "'%s' is not a number", arg);
*u = l;
if (errno || *u != l)
return tal_fmt(NULL, "'%s' is out of range", arg);
return NULL;
}
static char *opt_set_mode(const char *arg, mode_t *m)
{
char *endp;
long l;
assert(arg != NULL);
/* Ensure length, and starts with 0. */
if (strlen(arg) != 4 || arg[0] != '0')
return tal_fmt(NULL, "'%s' is not a file mode", arg);
/* strtol, manpage, yech. */
errno = 0;
l = strtol(arg, &endp, 8); /* Octal. */
if (errno || *endp)
return tal_fmt(NULL, "'%s' is not a file mode", arg);
*m = l;
/* Range check not needed, previous strlen checks ensures only
* 9-bit, which fits mode_t (unless your Unix is seriously borked).
*/
return NULL;
}
static char *opt_add_addr_withtype(const char *arg,
struct lightningd *ld,
enum addr_listen_announce ala,
bool wildcard_ok)
{
char const *err_msg;
struct wireaddr_internal wi;
assert(arg != NULL);
tal_arr_expand(&ld->proposed_listen_announce, ala);
if (!parse_wireaddr_internal(arg, &wi,
ld->portnum,
wildcard_ok, !ld->use_proxy_always, false,
&err_msg)) {
return tal_fmt(NULL, "Unable to parse address '%s': %s", arg, err_msg);
}
tal_arr_expand(&ld->proposed_wireaddr, wi);
return NULL;
}
static char *opt_add_announce_addr(const char *arg, struct lightningd *ld)
{
const struct wireaddr *wn;
size_t n = tal_count(ld->proposed_wireaddr);
char *err;
/* Check for autotor and reroute the call to --addr */
if (strstarts(arg, "autotor:"))
return opt_add_addr(arg, ld);
/* Check for statictor and reroute the call to --addr */
if (strstarts(arg, "statictor:"))
return opt_add_addr(arg, ld);
err = opt_add_addr_withtype(arg, ld, ADDR_ANNOUNCE, false);
if (err)
return err;
/* Can't announce anything that's not a normal wireaddr. */
if (ld->proposed_wireaddr[n].itype != ADDR_INTERNAL_WIREADDR)
return tal_fmt(NULL, "address '%s' is not announcable",
arg);
/* gossipd will refuse to announce the second one, sure, but it's
* better to check and fail now if they've explicitly asked for it. */
wn = &ld->proposed_wireaddr[n].u.wireaddr;
for (size_t i = 0; i < n; i++) {
const struct wireaddr *wi;
if (ld->proposed_listen_announce[i] != ADDR_ANNOUNCE)
continue;
assert(ld->proposed_wireaddr[i].itype == ADDR_INTERNAL_WIREADDR);
wi = &ld->proposed_wireaddr[i].u.wireaddr;
if (wn->type != wi->type)
continue;
return tal_fmt(NULL, "Cannot announce address %s;"
" already have %s which is the same type",
type_to_string(tmpctx, struct wireaddr, wn),
type_to_string(tmpctx, struct wireaddr, wi));
}
return NULL;
}
static char *opt_add_addr(const char *arg, struct lightningd *ld)
{
struct wireaddr_internal addr;
/* handle in case you used the addr option with an .onion */
if (parse_wireaddr_internal(arg, &addr, 0, true, false, true, NULL)) {
if (addr.itype == ADDR_INTERNAL_WIREADDR && (
addr.u.wireaddr.type == ADDR_TYPE_TOR_V2 ||
addr.u.wireaddr.type == ADDR_TYPE_TOR_V3)) {
log_unusual(ld->log, "You used `--addr=%s` option with an .onion address, please use"
" `--announce-addr` ! You are lucky in this node live some wizards and"
" fairies, we have done this for you and announce, Be as hidden as wished",
arg);
return opt_add_announce_addr(arg, ld);
}
}
/* the intended call */
return opt_add_addr_withtype(arg, ld, ADDR_LISTEN_AND_ANNOUNCE, true);
}
static char *opt_subdaemon(const char *arg, struct lightningd *ld)
{
char *subdaemon;
char *sdpath;
/* example arg: "hsmd:remote_hsmd" */
size_t colonoff = strcspn(arg, ":");
if (!arg[colonoff])
return tal_fmt(NULL, "argument must contain ':'");
subdaemon = tal_strndup(ld, arg, colonoff);
if (!is_subdaemon(subdaemon))
return tal_fmt(NULL, "\"%s\" is not a subdaemon", subdaemon);
/* Make the value a tal-child of the subdaemon */
sdpath = tal_strdup(subdaemon, arg + colonoff + 1);
/* Remove any preexisting alt subdaemon mapping (and
* implicitly, the sdpath). */
tal_free(strmap_del(&ld->alt_subdaemons, subdaemon, NULL));
strmap_add(&ld->alt_subdaemons, subdaemon, sdpath);
return NULL;
}
static char *opt_add_bind_addr(const char *arg, struct lightningd *ld)
{
struct wireaddr_internal addr;
/* handle in case you used the bind option with an .onion */
if (parse_wireaddr_internal(arg, &addr, 0, true, false, true, NULL)) {
if (addr.itype == ADDR_INTERNAL_WIREADDR && (
addr.u.wireaddr.type == ADDR_TYPE_TOR_V2 ||
addr.u.wireaddr.type == ADDR_TYPE_TOR_V3)) {
log_unusual(ld->log, "You used `--bind-addr=%s` option with an .onion address,"
" You are lucky in this node live some wizards and"
" fairies, we have done this for you and don't announce, Be as hidden as wished",
arg);
return NULL;
}
}
/* the intended call */
return opt_add_addr_withtype(arg, ld, ADDR_LISTEN, true);
}
static void opt_show_u64(char buf[OPT_SHOW_LEN], const u64 *u)
{
snprintf(buf, OPT_SHOW_LEN, "%"PRIu64, *u);
}
static void opt_show_u32(char buf[OPT_SHOW_LEN], const u32 *u)
{
snprintf(buf, OPT_SHOW_LEN, "%"PRIu32, *u);
}
static void opt_show_s32(char buf[OPT_SHOW_LEN], const s32 *u)
{
snprintf(buf, OPT_SHOW_LEN, "%"PRIi32, *u);
}
static void opt_show_mode(char buf[OPT_SHOW_LEN], const mode_t *m)
{
snprintf(buf, OPT_SHOW_LEN, "\"%04o\"", (int) *m);
}
static char *opt_set_rgb(const char *arg, struct lightningd *ld)
{
assert(arg != NULL);
ld->rgb = tal_free(ld->rgb);
/* BOLT #7:
*
* - Note: the first byte of `rgb_color` is the red value, the second
* byte is the green value, and the last byte is the blue value.
*/
ld->rgb = tal_hexdata(ld, arg, strlen(arg));
if (!ld->rgb || tal_count(ld->rgb) != 3)
return tal_fmt(NULL, "rgb '%s' is not six hex digits", arg);
return NULL;
}
static char *opt_set_alias(const char *arg, struct lightningd *ld)
{
assert(arg != NULL);
ld->alias = tal_free(ld->alias);
/* BOLT #7:
*
* * [`32*byte`:`alias`]
*...
* - MUST set `alias` to a valid UTF-8 string, with any
* `alias` trailing-bytes equal to 0.
*/
if (strlen(arg) > 32)
return tal_fmt(NULL, "Alias '%s' is over 32 characters", arg);
ld->alias = tal_arrz(ld, u8, 33);
strncpy((char*)ld->alias, arg, 32);
return NULL;
}
static char *opt_set_offline(struct lightningd *ld)
{
ld->reconnect = false;
ld->listen = false;
return NULL;
}
static char *opt_add_proxy_addr(const char *arg, struct lightningd *ld)
{
bool needed_dns = false;
tal_free(ld->proxyaddr);
/* We use a tal_arr here, so we can marshal it to gossipd */
ld->proxyaddr = tal_arr(ld, struct wireaddr, 1);
if (!parse_wireaddr(arg, ld->proxyaddr, 9050,
ld->use_proxy_always ? &needed_dns : NULL,
NULL)) {
return tal_fmt(NULL, "Unable to parse Tor proxy address '%s' %s",
arg, needed_dns ? " (needed dns)" : "");
}
return NULL;
}
static char *opt_add_plugin(const char *arg, struct lightningd *ld)
{
if (plugin_blacklisted(ld->plugins, arg)) {
log_info(ld->log, "%s: disabled via disable-plugin", arg);
return NULL;
}
plugin_register(ld->plugins, arg, NULL);
return NULL;
}
static char *opt_disable_plugin(const char *arg, struct lightningd *ld)
{
plugin_blacklist(ld->plugins, arg);
return NULL;
}
static char *opt_add_plugin_dir(const char *arg, struct lightningd *ld)
{
return add_plugin_dir(ld->plugins, arg, false);
}
static char *opt_clear_plugins(struct lightningd *ld)
{
clear_plugins(ld->plugins);
return NULL;
}
/* Prompt the user to enter a password, from which will be derived the key used
* for `hsm_secret` encryption.
* The algorithm used to derive the key is Argon2(id), to which libsodium
* defaults. However argon2id-specific constants are used in case someone runs it
* with a libsodium version which default constants differs (typically <1.0.9).
*/
static char *opt_set_hsm_password(struct lightningd *ld)
{
struct termios current_term, temp_term;
char *passwd = NULL;
size_t passwd_size = 0;
u8 salt[16] = "c-lightning\0\0\0\0\0";
ld->encrypted_hsm = true;
ld->config.keypass = tal(NULL, struct secret);
/* Don't swap the encryption key ! */
if (sodium_mlock(ld->config.keypass->data,
sizeof(ld->config.keypass->data)) != 0)
return "Could not lock hsm_secret encryption key memory.";
/* Get the password from stdin, but don't echo it. */
if (tcgetattr(fileno(stdin), ¤t_term) != 0)
return "Could not get current terminal options.";
temp_term = current_term;
temp_term.c_lflag &= ~ECHO;
if (tcsetattr(fileno(stdin), TCSAFLUSH, &temp_term) != 0)
return "Could not disable password echoing.";
printf("The hsm_secret is encrypted with a password. In order to "
"decrypt it and start the node you must provide the password.\n");
printf("Enter hsm_secret password: ");
/* If we don't flush we might end up being buffered and we might seem
* to hang while we wait for the password. */
fflush(stdout);
if (getline(&passwd, &passwd_size, stdin) < 0)
return "Could not read password from stdin.";
if (passwd[strlen(passwd) - 1] == '\n')
passwd[strlen(passwd) - 1] = '\0';
if (tcsetattr(fileno(stdin), TCSAFLUSH, ¤t_term) != 0)
return "Could not restore terminal options.";
printf("\n");
/* Derive the key from the password. */
if (strlen(passwd) < crypto_pwhash_argon2id_PASSWD_MIN)
return "Password too short to be able to derive a key from it.";
if (strlen(passwd) > crypto_pwhash_argon2id_PASSWD_MAX)
return "Password too long to be able to derive a key from it.";
if (crypto_pwhash(ld->config.keypass->data, sizeof(ld->config.keypass->data),
passwd, strlen(passwd), salt,
/* INTERACTIVE needs 64 MiB of RAM, MODERATE needs 256,
* and SENSITIVE needs 1024. */
crypto_pwhash_argon2id_OPSLIMIT_MODERATE,
crypto_pwhash_argon2id_MEMLIMIT_MODERATE,
crypto_pwhash_ALG_ARGON2ID13) != 0)
return "Could not derive a key from the password.";
free(passwd);
return NULL;
}
#if DEVELOPER
static char *opt_subprocess_debug(const char *optarg, struct lightningd *ld)
{
ld->dev_debug_subprocess = optarg;
return NULL;
}
static char *opt_force_privkey(const char *optarg, struct lightningd *ld)
{
tal_free(ld->dev_force_privkey);
ld->dev_force_privkey = tal(ld, struct privkey);
if (!hex_decode(optarg, strlen(optarg),
ld->dev_force_privkey, sizeof(*ld->dev_force_privkey)))
return tal_fmt(NULL, "Unable to parse privkey '%s'", optarg);
return NULL;
}
static char *opt_force_bip32_seed(const char *optarg, struct lightningd *ld)
{
tal_free(ld->dev_force_bip32_seed);
ld->dev_force_bip32_seed = tal(ld, struct secret);
if (!hex_decode(optarg, strlen(optarg),
ld->dev_force_bip32_seed,
sizeof(*ld->dev_force_bip32_seed)))
return tal_fmt(NULL, "Unable to parse secret '%s'", optarg);
return NULL;
}
static char *opt_force_tmp_channel_id(const char *optarg, struct lightningd *ld)
{
tal_free(ld->dev_force_tmp_channel_id);
ld->dev_force_tmp_channel_id = tal(ld, struct channel_id);
if (!hex_decode(optarg, strlen(optarg),
ld->dev_force_tmp_channel_id,
sizeof(*ld->dev_force_tmp_channel_id)))
return tal_fmt(NULL, "Unable to parse channel id '%s'", optarg);
return NULL;
}
static char *opt_force_channel_secrets(const char *optarg,
struct lightningd *ld)
{
char **strs;
tal_free(ld->dev_force_channel_secrets);
tal_free(ld->dev_force_channel_secrets_shaseed);
ld->dev_force_channel_secrets = tal(ld, struct secrets);
ld->dev_force_channel_secrets_shaseed = tal(ld, struct sha256);
strs = tal_strsplit(tmpctx, optarg, "/", STR_EMPTY_OK);
if (tal_count(strs) != 7) /* Last is NULL */
return "Expected 6 hex secrets separated by /";
if (!hex_decode(strs[0], strlen(strs[0]),
&ld->dev_force_channel_secrets->funding_privkey,
sizeof(ld->dev_force_channel_secrets->funding_privkey))
|| !hex_decode(strs[1], strlen(strs[1]),
&ld->dev_force_channel_secrets->revocation_basepoint_secret,
sizeof(ld->dev_force_channel_secrets->revocation_basepoint_secret))
|| !hex_decode(strs[2], strlen(strs[2]),
&ld->dev_force_channel_secrets->payment_basepoint_secret,
sizeof(ld->dev_force_channel_secrets->payment_basepoint_secret))
|| !hex_decode(strs[3], strlen(strs[3]),
&ld->dev_force_channel_secrets->delayed_payment_basepoint_secret,
sizeof(ld->dev_force_channel_secrets->delayed_payment_basepoint_secret))
|| !hex_decode(strs[4], strlen(strs[4]),
&ld->dev_force_channel_secrets->htlc_basepoint_secret,
sizeof(ld->dev_force_channel_secrets->htlc_basepoint_secret))
|| !hex_decode(strs[5], strlen(strs[5]),
ld->dev_force_channel_secrets_shaseed,
sizeof(*ld->dev_force_channel_secrets_shaseed)))
return "Expected 6 hex secrets separated by /";
return NULL;
}
static void dev_register_opts(struct lightningd *ld)
{
/* We might want to debug plugins, which are started before normal
* option parsing */
opt_register_early_arg("--dev-debugger=<subprocess>", opt_subprocess_debug, NULL,
ld, "Invoke gdb at start of <subprocess>");
opt_register_noarg("--dev-no-reconnect", opt_set_invbool,
&ld->reconnect,
"Disable automatic reconnect-attempts by this node, but accept incoming");
opt_register_noarg("--dev-fail-on-subdaemon-fail", opt_set_bool,
&ld->dev_subdaemon_fail, opt_hidden);
opt_register_arg("--dev-disconnect=<filename>", opt_subd_dev_disconnect,
NULL, ld, "File containing disconnection points");
opt_register_noarg("--dev-allow-localhost", opt_set_bool,
&ld->dev_allow_localhost,
"Announce and allow announcments for localhost address");
opt_register_arg("--dev-bitcoind-poll", opt_set_u32, opt_show_u32,
&ld->topology->poll_seconds,
"Time between polling for new transactions");
opt_register_noarg("--dev-fast-gossip", opt_set_bool,
&ld->dev_fast_gossip,
"Make gossip broadcast 1 second, etc");
opt_register_noarg("--dev-fast-gossip-prune", opt_set_bool,
&ld->dev_fast_gossip_prune,
"Make gossip pruning 30 seconds");
opt_register_arg("--dev-gossip-time", opt_set_u32, opt_show_u32,
&ld->dev_gossip_time,
"UNIX time to override gossipd to use.");
opt_register_arg("--dev-force-privkey", opt_force_privkey, NULL, ld,
"Force HSM to use this as node private key");
opt_register_arg("--dev-force-bip32-seed", opt_force_bip32_seed, NULL, ld,
"Force HSM to use this as bip32 seed");
opt_register_arg("--dev-force-channel-secrets", opt_force_channel_secrets, NULL, ld,
"Force HSM to use these for all per-channel secrets");
opt_register_arg("--dev-max-funding-unconfirmed-blocks",
opt_set_u32, opt_show_u32,
&ld->max_funding_unconfirmed,
"Maximum number of blocks we wait for a channel "
"funding transaction to confirm, if we are the "
"fundee.");
opt_register_arg("--dev-force-tmp-channel-id", opt_force_tmp_channel_id, NULL, ld,
"Force the temporary channel id, instead of random");
opt_register_noarg("--dev-no-htlc-timeout", opt_set_bool,
&ld->dev_no_htlc_timeout,
"Don't kill channeld if HTLCs not confirmed within 30 seconds");
opt_register_noarg("--dev-fail-process-onionpacket", opt_set_bool,
&dev_fail_process_onionpacket,
"Force all processing of onion packets to fail");
opt_register_noarg("--dev-no-version-checks", opt_set_bool,
&ld->dev_no_version_checks,
"Skip calling subdaemons with --version on startup");
}
#endif /* DEVELOPER */
static const struct config testnet_config = {
/* 6 blocks to catch cheating attempts. */
.locktime_blocks = 6,
/* They can have up to 14 days, maximumu value that lnd will ask for by default. */
/* FIXME Convince lnd to use more reasonable defaults... */
.locktime_max = 14 * 24 * 6,
/* We're fairly trusting, under normal circumstances. */
.anchor_confirms = 1,
/* Testnet fees are crazy, allow infinite feerange. */
.commitment_fee_min_percent = 0,
.commitment_fee_max_percent = 0,
/* Testnet blockspace is free. */
.max_concurrent_htlcs = 483,
/* Be aggressive on testnet. */
.cltv_expiry_delta = 6,
.cltv_final = 10,
/* Send commit 10msec after receiving; almost immediately. */
.commit_time_ms = 10,
/* Allow dust payments */
.fee_base = 1,
/* Take 0.001% */
.fee_per_satoshi = 10,
/* Testnet sucks */
.ignore_fee_limits = true,
/* Rescan 5 hours of blocks on testnet, it's reorg happy */
.rescan = 30,
.use_dns = true,
/* Sets min_effective_htlc_capacity - at 1000$/BTC this is 10ct */
.min_capacity_sat = 10000,
.use_v3_autotor = true,
};
/* aka. "Dude, where's my coins?" */
static const struct config mainnet_config = {
/* ~one day to catch cheating attempts. */
.locktime_blocks = 6 * 24,
/* They can have up to 14 days, maximumu value that lnd will ask for by default. */
/* FIXME Convince lnd to use more reasonable defaults... */
.locktime_max = 14 * 24 * 6,
/* We're fairly trusting, under normal circumstances. */
.anchor_confirms = 3,
/* Insist between 2 and 20 times the 2-block fee. */
.commitment_fee_min_percent = 200,
.commitment_fee_max_percent = 2000,
/* While up to 483 htlcs are possible we do 30 by default (as eclair does) to save blockspace */
.max_concurrent_htlcs = 30,
/* BOLT #2:
*
* 1. the `cltv_expiry_delta` for channels, `3R+2G+2S`: if in doubt, a
* `cltv_expiry_delta` of 12 is reasonable (R=2, G=1, S=2)
*/
/* R = 2, G = 1, S = 3 */
.cltv_expiry_delta = 14,
/* BOLT #2:
*
* 4. the minimum `cltv_expiry` accepted for terminal payments: the
* worst case for the terminal node C is `2R+G+S` blocks */
.cltv_final = 10,
/* Send commit 10msec after receiving; almost immediately. */
.commit_time_ms = 10,
/* Discourage dust payments */
.fee_base = 1000,
/* Take 0.001% */
.fee_per_satoshi = 10,
/* Mainnet should have more stable fees */
.ignore_fee_limits = false,
/* Rescan 2.5 hours of blocks on startup, it's not so reorg happy */
.rescan = 15,
.use_dns = true,
/* Sets min_effective_htlc_capacity - at 1000$/BTC this is 10ct */
.min_capacity_sat = 10000,
/* Allow to define the default behavior of tor services calls*/
.use_v3_autotor = true,
};
static void check_config(struct lightningd *ld)
{
/* We do this by ensuring it's less than the minimum we would accept. */
if (ld->config.commitment_fee_max_percent != 0
&& ld->config.commitment_fee_max_percent
< ld->config.commitment_fee_min_percent)
fatal("Commitment fee invalid min-max %u-%u",
ld->config.commitment_fee_min_percent,
ld->config.commitment_fee_max_percent);
/* BOLT #2:
*
* The receiving node MUST fail the channel if:
*...
* - `max_accepted_htlcs` is greater than 483.
*/
if (ld->config.max_concurrent_htlcs < 1 || ld->config.max_concurrent_htlcs > 483)
fatal("--max-concurrent-htlcs value must be between 1 and 483 it is: %u",
ld->config.max_concurrent_htlcs);
if (ld->config.anchor_confirms == 0)
fatal("anchor-confirms must be greater than zero");
if (ld->use_proxy_always && !ld->proxyaddr)
fatal("--always-use-proxy needs --proxy");
}
static char *test_subdaemons_and_exit(struct lightningd *ld)
{
test_subdaemons(ld);
exit(0);
return NULL;
}
static char *list_features_and_exit(struct lightningd *ld)
{
const char **features = list_supported_features(tmpctx, ld->our_features);
for (size_t i = 0; i < tal_count(features); i++)
printf("%s\n", features[i]);
exit(0);
}
static char *opt_lightningd_usage(struct lightningd *ld)
{
char *extra = tal_fmt(NULL, "\nA bitcoin lightning daemon (default "
"values shown for network: %s).", chainparams->network_name);
opt_usage_and_exit(extra);
tal_free(extra);
return NULL;
}
static char *opt_start_daemon(struct lightningd *ld)
{
int fds[2];
int exitcode, pid;
/* Already a daemon? OK. */
if (ld->daemon_parent_fd != -1)
return NULL;
if (pipe(fds) != 0)
err(1, "Creating pipe to talk to --daemon");
pid = fork();
if (pid == -1)
err(1, "Fork failed for --daemon");
if (pid == 0) {
/* Child returns, continues as normal. */
close(fds[0]);
ld->daemon_parent_fd = fds[1];
return NULL;
}
/* OK, we are the parent. We exit with status told to us by
* child. */
close(fds[1]);
if (read(fds[0], &exitcode, sizeof(exitcode)) == sizeof(exitcode))
_exit(exitcode);
/* It died before writing exitcode (presumably 0), so we grab it */
waitpid(pid, &exitcode, 0);
if (WIFEXITED(exitcode))
_exit(WEXITSTATUS(exitcode));
errx(1, "Died with signal %u", WTERMSIG(exitcode));
}
static char *opt_set_wumbo(struct lightningd *ld)
{
feature_set_or(ld->our_features,
take(feature_set_for_feature(NULL,
OPTIONAL_FEATURE(OPT_LARGE_CHANNELS))));
return NULL;
}
static void register_opts(struct lightningd *ld)
{
/* This happens before plugins started */
opt_register_early_noarg("--test-daemons-only",
test_subdaemons_and_exit,
ld, opt_hidden);
/* Register plugins as an early args, so we can initialize them and have
* them register more command line options */
opt_register_early_arg("--plugin", opt_add_plugin, NULL, ld,
"Add a plugin to be run (can be used multiple times)");
opt_register_early_arg("--plugin-dir", opt_add_plugin_dir,
NULL, ld,
"Add a directory to load plugins from (can be used multiple times)");
opt_register_early_noarg("--clear-plugins", opt_clear_plugins,
ld,
"Remove all plugins added before this option");
opt_register_early_arg("--disable-plugin", opt_disable_plugin,
NULL, ld,
"Disable a particular plugin by filename/name");
/* Early, as it suppresses DNS lookups from cmdline too. */
opt_register_early_arg("--always-use-proxy",
opt_set_bool_arg, opt_show_bool,
&ld->use_proxy_always, "Use the proxy always");
/* This immediately makes is a daemon. */
opt_register_early_noarg("--daemon", opt_start_daemon, ld,
"Run in the background, suppress stdout/stderr");
opt_register_early_arg("--wallet", opt_set_talstr, NULL,
&ld->wallet_dsn,
"Location of the wallet database.");
/* This affects our features, so set early. */
opt_register_early_noarg("--large-channels|--wumbo",
opt_set_wumbo, ld,
"Allow channels larger than 0.16777215 BTC");
opt_register_noarg("--help|-h", opt_lightningd_usage, ld,
"Print this message.");
opt_register_arg("--rgb", opt_set_rgb, NULL, ld,
"RRGGBB hex color for node");
opt_register_arg("--alias", opt_set_alias, NULL, ld,
"Up to 32-byte alias for node");
opt_register_arg("--pid-file=<file>", opt_set_talstr, opt_show_charp,
&ld->pidfile,
"Specify pid file");
opt_register_arg("--ignore-fee-limits", opt_set_bool_arg, opt_show_bool,
&ld->config.ignore_fee_limits,
"(DANGEROUS) allow peer to set any feerate");
opt_register_arg("--watchtime-blocks", opt_set_u32, opt_show_u32,
&ld->config.locktime_blocks,
"Blocks before peer can unilaterally spend funds");
opt_register_arg("--max-locktime-blocks", opt_set_u32, opt_show_u32,
&ld->config.locktime_max,
"Maximum blocks funds may be locked for");
opt_register_arg("--funding-confirms", opt_set_u32, opt_show_u32,
&ld->config.anchor_confirms,
"Confirmations required for funding transaction");
opt_register_arg("--commit-fee-min=<percent>", opt_set_u32, opt_show_u32,
&ld->config.commitment_fee_min_percent,
"Minimum percentage of fee to accept for commitment");
opt_register_arg("--commit-fee-max=<percent>", opt_set_u32, opt_show_u32,
&ld->config.commitment_fee_max_percent,
"Maximum percentage of fee to accept for commitment (0 for unlimited)");
opt_register_arg("--cltv-delta", opt_set_u32, opt_show_u32,
&ld->config.cltv_expiry_delta,
"Number of blocks for cltv_expiry_delta");
opt_register_arg("--cltv-final", opt_set_u32, opt_show_u32,
&ld->config.cltv_final,
"Number of blocks for final cltv_expiry");
opt_register_arg("--commit-time=<millseconds>",
opt_set_u32, opt_show_u32,
&ld->config.commit_time_ms,
"Time after changes before sending out COMMIT");
opt_register_arg("--fee-base", opt_set_u32, opt_show_u32,
&ld->config.fee_base,
"Millisatoshi minimum to charge for HTLC");
opt_register_arg("--rescan", opt_set_s32, opt_show_s32,
&ld->config.rescan,
"Number of blocks to rescan from the current head, or "
"absolute blockheight if negative");
opt_register_arg("--fee-per-satoshi", opt_set_u32, opt_show_u32,
&ld->config.fee_per_satoshi,
"Microsatoshi fee for every satoshi in HTLC");
opt_register_arg("--max-concurrent-htlcs", opt_set_u32, opt_show_u32,
&ld->config.max_concurrent_htlcs,
"Number of HTLCs one channel can handle concurrently. Should be between 1 and 483");
opt_register_arg("--min-capacity-sat", opt_set_u64, opt_show_u64,
&ld->config.min_capacity_sat,
"Minimum capacity in satoshis for accepting channels");
opt_register_arg("--addr", opt_add_addr, NULL,
ld,
"Set an IP address (v4 or v6) to listen on and announce to the network for incoming connections");
opt_register_arg("--bind-addr", opt_add_bind_addr, NULL,
ld,
"Set an IP address (v4 or v6) to listen on, but not announce");
opt_register_arg("--announce-addr", opt_add_announce_addr, NULL,
ld,
"Set an IP address (v4 or v6) or .onion v2/v3 to announce, but not listen on");
opt_register_noarg("--offline", opt_set_offline, ld,
"Start in offline-mode (do not automatically reconnect and do not accept incoming connections)");
opt_register_arg("--autolisten", opt_set_bool_arg, opt_show_bool,
&ld->autolisten,
"If true, listen on default port and announce if it seems to be a public interface");
opt_register_arg("--proxy", opt_add_proxy_addr, NULL,
ld,"Set a socks v5 proxy IP address and port");
opt_register_arg("--tor-service-password", opt_set_talstr, NULL,
&ld->tor_service_password,
"Set a Tor hidden service password");
opt_register_noarg("--disable-dns", opt_set_invbool, &ld->config.use_dns,
"Disable DNS lookups of peers");
opt_register_noarg("--enable-autotor-v2-mode", opt_set_invbool, &ld->config.use_v3_autotor,
"Try to get a v2 onion address from the Tor service call, default is v3");
opt_register_noarg("--encrypted-hsm", opt_set_hsm_password, ld,
"Set the password to encrypt hsm_secret with. If no password is passed through command line, "
"you will be prompted to enter it.");
opt_register_arg("--rpc-file-mode", &opt_set_mode, &opt_show_mode,
&ld->rpc_filemode,
"Set the file mode (permissions) for the "
"JSON-RPC socket");
opt_register_arg("--subdaemon", opt_subdaemon, NULL,
ld, "Arg specified as SUBDAEMON:PATH. "
"Specifies an alternate subdaemon binary. "
"If the supplied path is relative the subdaemon "
"binary is found in the working directory. "
"This option may be specified multiple times. "
"For example, "
"--subdaemon=hsmd:remote_signer "
"would use a hypothetical remote signing subdaemon.");
opt_register_logging(ld);
opt_register_version();
#if DEVELOPER
dev_register_opts(ld);
#endif
}
/* We are in ld->config_netdir when this is run! */
static void promote_missing_files(struct lightningd *ld)
{
#ifdef COMPAT_V073
DIR *d_from;
struct dirent *d;
struct stat st;
/* If hsm_secret already exists, we assume we're ugpraded */
if (stat("hsm_secret", &st) == 0)
return;
if (errno != ENOENT)
err(1, "Looking for hsm_secret in lightning dir");
/* If hsm doesn't exist in basedir, we've nothing to upgrade. */
if (stat(path_join(tmpctx, ld->config_basedir, "hsm_secret"), &st) != 0)
return;
d_from = opendir(ld->config_basedir);
if (!d_from)
err(1, "Opening %s", ld->config_basedir);
while ((d = readdir(d_from)) != NULL) {
const char *fullname;
/* Ignore this directory and upper one, and leave
* config and pid files */
if (streq(d->d_name, ".")
|| streq(d->d_name, "..")
|| streq(d->d_name, "config")
|| strends(d->d_name, ".pid"))
continue;
fullname = path_join(tmpctx, ld->config_basedir, d->d_name);
/* Simply remove rpc file: if they use --rpc-file to place it
* here explicitly it will get recreated, but moving it would
* be confusing as it would be unused. */
if (streq(d->d_name, "lightning-rpc")) {
if (unlink(fullname) != 0)
log_unusual(ld->log, "Could not unlink %s: %s",
fullname, strerror(errno));
continue;
}
/* Ignore any directories. */
if (lstat(fullname, &st) != 0)
errx(1, "Could not stat %s", fullname);
if ((st.st_mode & S_IFMT) == S_IFDIR)
continue;
/* Check we don't overwrite something in this dir! */
if (lstat(d->d_name, &st) != -1)
errx(1, "Refusing to overwrite %s into %s/",
fullname, ld->config_netdir);
log_unusual(ld->log, "Moving %s into %s/",
d->d_name, ld->config_netdir);
if (rename(fullname, d->d_name) != 0)
err(1, "Could not move %s/%s to %s",
ld->config_basedir, d->d_name, ld->config_netdir);
}
closedir(d_from);
#endif /* COMPAT_V073 */
}
/* Names stolen from https://github.com/ternus/nsaproductgenerator/blob/master/nsa.js */
static const char *codename_adjective[]
= { "LOUD", "RED", "BLUE", "GREEN", "YELLOW", "IRATE", "ANGRY", "PEEVED",
"HAPPY", "SLIMY", "SLEEPY", "JUNIOR", "SLICKER", "UNITED", "SOMBER",
"BIZARRE", "ODD", "WEIRD", "WRONG", "LATENT", "CHILLY", "STRANGE", "LOUD",
"SILENT", "HOPPING", "ORANGE", "VIOLET", "VIOLENT", "LIGHTNING" };
static const char *codename_noun[]
= { "WHISPER", "FELONY", "MOON", "SUCKER", "PENGUIN", "WAFFLE", "MAESTRO",
"NIGHT", "TRINITY", "DEITY", "MONKEY", "ARK", "SQUIRREL", "IRON", "BOUNCE",
"FARM", "CHEF", "TROUGH", "NET", "TRAWL", "GLEE", "WATER", "SPORK", "PLOW",
"FEED", "SOUFFLE", "ROUTE", "BAGEL", "MONTANA", "ANALYST", "AUTO", "WATCH",
"PHOTO", "YARD", "SOURCE", "MONKEY", "SEAGULL", "TOLL", "SPAWN", "GOPHER",
"CHIPMUNK", "SET", "CALENDAR", "ARTIST", "CHASER", "SCAN", "TOTE", "BEAM",
"ENTOURAGE", "GENESIS", "WALK", "SPATULA", "RAGE", "FIRE", "MASTER" };
void setup_color_and_alias(struct lightningd *ld)
{
if (!ld->rgb)
/* You can't get much red by default */
ld->rgb = tal_dup_arr(ld, u8, ld->id.k, 3, 0);
if (!ld->alias) {
u64 adjective, noun;
char *name;
memcpy(&adjective, ld->id.k+3, sizeof(adjective));
memcpy(&noun, ld->id.k+3+sizeof(adjective), sizeof(noun));
noun %= ARRAY_SIZE(codename_noun);
adjective %= ARRAY_SIZE(codename_adjective);
/* Only use 32 characters */
name = tal_fmt(ld, "%s%s",
codename_adjective[adjective],