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options.c
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options.c
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#include <ccan/array_size/array_size.h>
#include <ccan/err/err.h>
#include <ccan/mem/mem.h>
#include <ccan/opt/opt.h>
#include <ccan/opt/private.h>
#include <ccan/str/hex/hex.h>
#include <ccan/tal/path/path.h>
#include <ccan/tal/str/str.h>
#include <common/configdir.h>
#include <common/features.h>
#include <common/hsm_encryption.h>
#include <common/json_command.h>
#include <common/json_helpers.h>
#include <common/json_tok.h>
#include <common/param.h>
#include <common/type_to_string.h>
#include <common/version.h>
#include <common/wireaddr.h>
#include <dirent.h>
#include <errno.h>
#include <lightningd/chaintopology.h>
#include <lightningd/options.h>
#include <lightningd/plugin.h>
#include <lightningd/subd.h>
#include <sys/stat.h>
#include <sys/wait.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_force_feerates(const char *arg, struct lightningd *ld)
{
char **vals = tal_strsplit(tmpctx, arg, "/", STR_EMPTY_OK);
size_t n;
/* vals has NULL at end, enum feerate is 0 based */
if (tal_count(vals) - 1 > FEERATE_PENALTY + 1)
return "Too many values";
if (!ld->force_feerates)
ld->force_feerates = tal_arr(ld, u32, FEERATE_PENALTY + 1);
n = 0;
for (size_t i = 0; i < tal_count(ld->force_feerates); i++) {
char *err = opt_set_u32(vals[n], &ld->force_feerates[i]);
if (err)
return err;
fprintf(stderr, "Set feerate %zu based on val %zu\n", i, n);
if (vals[n+1])
n++;
}
return NULL;
}
static char *fmt_force_feerates(const tal_t *ctx, const u32 *force_feerates)
{
char *ret;
size_t last;
if (!force_feerates)
return NULL;
ret = tal_fmt(ctx, "%i", force_feerates[0]);
last = 0;
for (size_t i = 1; i < tal_count(force_feerates); i++) {
if (force_feerates[i] == force_feerates[i-1])
continue;
/* Different? Catchup! */
for (size_t j = last + 1; j <= i; j++)
tal_append_fmt(&ret, "/%i", force_feerates[j]);
last = i;
}
return ret;
}
#if EXPERIMENTAL_FEATURES
static char *opt_set_accept_extra_tlv_types(const char *arg,
struct lightningd *ld)
{
char *endp, **elements = tal_strsplit(NULL, arg, ",", STR_NO_EMPTY);;
unsigned long long l;
u64 u;
for (int i = 0; elements[i] != NULL; i++) {
/* This is how the manpage says to do it. Yech. */
errno = 0;
l = strtoull(elements[i], &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);
tal_arr_expand(&ld->accept_extra_tlv_types, u);
}
tal_free(elements);
return NULL;
}
#endif
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;
bool dns_ok;
char *address;
u16 port;
assert(arg != NULL);
dns_ok = !ld->always_use_proxy && ld->config.use_dns;
if (!separate_address_and_port(tmpctx, arg, &address, &port))
return tal_fmt(NULL, "Unable to parse address:port '%s'", arg);
if (is_ipaddr(address) || is_toraddr(address) || ala != ADDR_ANNOUNCE) {
if (!parse_wireaddr_internal(arg, &wi, ld->portnum,
wildcard_ok, dns_ok, false,
deprecated_apis, &err_msg)) {
return tal_fmt(NULL, "Unable to parse address '%s': %s", arg, err_msg);
}
/* Sanity check for exact duplicates. */
for (size_t i = 0; i < tal_count(ld->proposed_wireaddr); i++) {
/* Only compare announce vs announce and bind vs bind */
if ((ld->proposed_listen_announce[i] & ala) == 0)
continue;
if (wireaddr_internal_eq(&ld->proposed_wireaddr[i], &wi))
return tal_fmt(NULL, "Duplicate %s address %s",
ala & ADDR_ANNOUNCE ? "announce" : "listen",
type_to_string(tmpctx, struct wireaddr_internal, &wi));
}
tal_arr_expand(&ld->proposed_listen_announce, ala);
tal_arr_expand(&ld->proposed_wireaddr, wi);
}
#if EXPERIMENTAL_FEATURES /* BOLT7 DNS RFC #911 */
/* Add ADDR_TYPE_DNS to announce DNS hostnames */
if (is_dnsaddr(address) && ala & ADDR_ANNOUNCE) {
memset(&wi, 0, sizeof(wi));
wi.itype = ADDR_INTERNAL_WIREADDR;
wi.u.wireaddr.type = ADDR_TYPE_DNS;
wi.u.wireaddr.addrlen = strlen(address);
strncpy((char * restrict)&wi.u.wireaddr.addr,
address, sizeof(wi.u.wireaddr.addr) - 1);
wi.u.wireaddr.port = port;
tal_arr_expand(&ld->proposed_listen_announce, ADDR_ANNOUNCE);
tal_arr_expand(&ld->proposed_wireaddr, wi);
}
#endif
return NULL;
}
static char *opt_add_announce_addr(const char *arg, struct lightningd *ld)
{
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);
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,
deprecated_apis, NULL)) {
if (addr.itype == ADDR_INTERNAL_WIREADDR &&
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,
deprecated_apis, NULL)) {
if (addr.itype == ADDR_INTERNAL_WIREADDR &&
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->always_use_proxy ? &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, false, NULL, 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;
}
static char *opt_important_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, true, NULL, NULL);
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)
{
char *passwd, *passwd_confirmation, *err;
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:\n");
/* 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);
passwd = read_stdin_pass(&err);
if (!passwd)
return err;
printf("Confirm hsm_secret password:\n");
fflush(stdout);
passwd_confirmation = read_stdin_pass(&err);
if (!passwd_confirmation)
return err;
printf("\n");
ld->config.keypass = tal(NULL, struct secret);
err = hsm_secret_encryption_key(passwd, ld->config.keypass);
if (err)
return err;
ld->encrypted_hsm = true;
free(passwd);
free(passwd_confirmation);
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 char *opt_force_featureset(const char *optarg,
struct lightningd *ld)
{
char **parts = tal_strsplit(tmpctx, optarg, "/", STR_EMPTY_OK);
if (tal_count(parts) != NUM_FEATURE_PLACE) {
if (!strstarts(optarg, "-") && !strstarts(optarg, "+"))
return "Expected 5 feature sets (init, globalinit,"
" node_announce, channel, bolt11) separated"
" by / OR +/-<feature_num>";
char *endp;
long int n = strtol(optarg + 1, &endp, 10);
const struct feature_set *f;
if (*endp || endp == optarg + 1)
return "Invalid feature number";
f = feature_set_for_feature(NULL, n);
if (strstarts(optarg, "-")
&& !feature_set_sub(ld->our_features, take(f)))
return "Feature unknown";
if (strstarts(optarg, "+")
&& !feature_set_or(ld->our_features, take(f)))
return "Feature already flagged-on";
return NULL;
}
for (size_t i = 0; parts[i]; i++) {
char **bits = tal_strsplit(tmpctx, parts[i], ",", STR_EMPTY_OK);
tal_resize(&ld->our_features->bits[i], 0);
for (size_t j = 0; bits[j]; j++) {
char *endp;
long int n = strtol(bits[j], &endp, 10);
if (*endp || endp == bits[j])
return "Invalid bitnumber";
set_feature_bit(&ld->our_features->bits[i], n);
}
}
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_early_noarg("--dev-no-plugin-checksum", opt_set_bool,
&ld->dev_no_plugin_checksum,
"Don't checksum plugins to detect changes");
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->dev_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");
opt_register_early_noarg("--dev-builtin-plugins-unimportant",
opt_set_bool,
&ld->plugins->dev_builtin_plugins_unimportant,
"Make builtin plugins unimportant so you can plugin stop them.");
opt_register_arg("--dev-force-features", opt_force_featureset, NULL, ld,
"Force the init/globalinit/node_announce/channel/bolt11 features, each comma-separated bitnumbers");
opt_register_arg("--dev-timeout-secs", opt_set_u32, opt_show_u32,
&ld->config.connection_timeout_secs,
"Seconds to timeout if we don't receive INIT from peer");
opt_register_noarg("--dev-no-modern-onion", opt_set_bool,
&ld->dev_ignore_modern_onion,
"Ignore modern onion messages");
opt_register_noarg("--dev-no-obsolete-onion", opt_set_bool,
&ld->dev_ignore_obsolete_onion,
"Ignore obsolete onion messages");
}
#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 blockspace is free. */
.max_concurrent_htlcs = 483,
/* Max amount of dust allowed per channel (50ksat) */
.max_dust_htlc_exposure_msat = AMOUNT_MSAT(50000000),
/* 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$/BTC this is 10ct */
.min_capacity_sat = 10000,
.use_v3_autotor = true,
/* 1 minute should be enough for anyone! */
.connection_timeout_secs = 60,
.exp_offers = IFEXPERIMENTAL(true, false),
};
/* aka. "Dude, where's my coins?" */
static const struct config mainnet_config = {
/* ~one day to catch cheating attempts. */
.locktime_blocks = 6 * 24,
/* They can have up to 14 days, maximumu value that lnd will ask for by default. */
/* FIXME Convince lnd to use more reasonable defaults... */
.locktime_max = 14 * 24 * 6,
/* We're fairly trusting, under normal circumstances. */
.anchor_confirms = 3,
/* While up to 483 htlcs are possible we do 30 by default (as eclair does) to save blockspace */
.max_concurrent_htlcs = 30,
/* Max amount of dust allowed per channel (50ksat) */
.max_dust_htlc_exposure_msat = AMOUNT_MSAT(50000000),
/* BOLT #2:
*
* 1. the `cltv_expiry_delta` for channels, `3R+2G+2S`: if in doubt, a
* `cltv_expiry_delta` of at least 34 is reasonable (R=2, G=2, S=12)
*/
/* R = 2, G = 2, S = 12 */
.cltv_expiry_delta = 34,
/* BOLT #2:
*
* 4. the minimum `cltv_expiry` accepted for terminal payments: the
* worst case for the terminal node C is `2R+G+S` blocks */
.cltv_final = 18,
/* Send commit 10msec after receiving; almost immediately. */
.commit_time_ms = 10,
/* Discourage dust payments */
.fee_base = 1000,
/* Take 0.001% */
.fee_per_satoshi = 10,
/* Mainnet should have more stable fees */
.ignore_fee_limits = false,
/* Rescan 2.5 hours of blocks on startup, it's not so reorg happy */
.rescan = 15,
.use_dns = true,
/* Sets min_effective_htlc_capacity - at 1000$/BTC this is 10ct */
.min_capacity_sat = 10000,
/* Allow to define the default behavior of tor services calls*/
.use_v3_autotor = true,
/* 1 minute should be enough for anyone! */
.connection_timeout_secs = 60,
.exp_offers = IFEXPERIMENTAL(true, false),
};
static void check_config(struct lightningd *ld)
{
/* 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->always_use_proxy && !ld->proxyaddr)
fatal("--always-use-proxy needs --proxy");
if (ld->daemon_parent_fd != -1 && !ld->logfile)
fatal("--daemon needs --log-file");
}
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]);
#if EXPERIMENTAL_FEATURES
printf("supports_open_accept_channel_type\n");
#endif
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_msat(const char *arg, struct amount_msat *amt)
{
if (!parse_amount_msat(amt, arg, strlen(arg)))
return tal_fmt(NULL, "Unable to parse millisatoshi '%s'", arg);
return NULL;
}
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 char *opt_set_websocket_port(const char *arg, struct lightningd *ld)
{
u32 port COMPILER_WANTS_INIT("9.3.0 -O2");
char *err;
err = opt_set_u32(arg, &port);
if (err)
return err;
ld->websocket_port = port;
if (ld->websocket_port != port)
return tal_fmt(NULL, "'%s' is out of range", arg);
return NULL;
}
static char *opt_set_dual_fund(struct lightningd *ld)
{
/* Dual funding implies anchor outputs */
feature_set_or(ld->our_features,
take(feature_set_for_feature(NULL,
OPTIONAL_FEATURE(OPT_ANCHOR_OUTPUTS))));
feature_set_or(ld->our_features,
take(feature_set_for_feature(NULL,
OPTIONAL_FEATURE(OPT_DUAL_FUND))));
return NULL;
}
static char *opt_set_onion_messages(struct lightningd *ld)
{
feature_set_or(ld->our_features,
take(feature_set_for_feature(NULL,
OPTIONAL_FEATURE(OPT_ONION_MESSAGES))));
return NULL;
}
static char *opt_set_shutdown_wrong_funding(struct lightningd *ld)
{
feature_set_or(ld->our_features,
take(feature_set_for_feature(NULL,
OPTIONAL_FEATURE(OPT_SHUTDOWN_WRONG_FUNDING))));
return NULL;
}
static char *opt_set_offers(struct lightningd *ld)
{
ld->config.exp_offers = true;
return opt_set_onion_messages(ld);
}
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");
opt_register_early_arg("--important-plugin", opt_important_plugin,
NULL, ld,
"Add an important plugin to be run (can be used multiple times). Die if the plugin dies.");
/* Early, as it suppresses DNS lookups from cmdline too. */
opt_register_early_arg("--always-use-proxy",
opt_set_bool_arg, opt_show_bool,
&ld->always_use_proxy, "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_early_noarg("--experimental-dual-fund",
opt_set_dual_fund, ld,
"experimental: Advertise dual-funding"
" and allow peers to establish channels"
" via v2 channel open protocol.");
/* This affects our features, so set early. */
opt_register_early_noarg("--experimental-onion-messages",
opt_set_onion_messages, ld,
"EXPERIMENTAL: enable send, receive and relay"
" of onion messages");
opt_register_early_noarg("--experimental-offers",
opt_set_offers, ld,
"EXPERIMENTAL: enable send and receive of offers"
" (also sets experimental-onion-messages)");
opt_register_early_noarg("--experimental-shutdown-wrong-funding",
opt_set_shutdown_wrong_funding, ld,
"EXPERIMENTAL: allow shutdown with alternate txids");
opt_register_noarg("--help|-h", opt_lightningd_usage, ld,
"Print this message.");
opt_register_arg("--rgb", opt_set_rgb, NULL, ld,