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core-lightning/lightningd/options.c
Michael Schmoock 3fa539fc1b chore: increase min-capacity-sat to 10k 
The old value of 1000 sat was too small to cover the dust reserves.
This lead to the situation when trying to open a channel with minimal
amount, the channels got refused because they were not able cover the
commitment fees.

For this reason the minimal capacity should be increased to i.e. 10k
satoshi, as the technical minimum that also accounts for fees and
reserves is somewhere around 6k sat.
2019-04-16 15:01:28 -07:00

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#include <bitcoin/chainparams.h>
#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/read_write_all/read_write_all.h>
#include <ccan/short_types/short_types.h>
#include <ccan/tal/grab_file/grab_file.h>
#include <ccan/tal/path/path.h>
#include <ccan/tal/str/str.h>
#include <common/configdir.h>
#include <common/json_command.h>
#include <common/json_escaped.h>
#include <common/jsonrpc_errors.h>
#include <common/memleak.h>
#include <common/param.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 <stdio.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <wire/wire.h>
bool deprecated_apis = true;
/* Tal wrappers for opt. */
static void *opt_allocfn(size_t size)
{
return tal_arr_label(NULL, char, size, TAL_LABEL("opt_allocfn", ""));
}
static void *tal_reallocfn(void *ptr, size_t size)
{
if (!ptr) {
/* realloc(NULL) call is to allocate opt_table */
static bool opt_table_alloced = false;
if (!opt_table_alloced) {
opt_table_alloced = true;
return notleak(opt_allocfn(size));
}
return opt_allocfn(size);
}
tal_resize_(&ptr, 1, size, false);
return ptr;
}
static void tal_freefn(void *ptr)
{
tal_free(ptr);
}
/* 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_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_addr(const char *arg, struct lightningd *ld)
{
return opt_add_addr_withtype(arg, ld, ADDR_LISTEN_AND_ANNOUNCE, true);
}
static char *opt_add_bind_addr(const char *arg, struct lightningd *ld)
{
return opt_add_addr_withtype(arg, ld, ADDR_LISTEN, true);
}
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 = 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 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 char *opt_set_network(const char *arg, struct lightningd *ld)
{
assert(arg != NULL);
ld->topology->bitcoind->chainparams = chainparams_for_network(arg);
if (!ld->topology->bitcoind->chainparams)
return tal_fmt(NULL, "Unknown network name '%s'", arg);
return NULL;
}
static char *opt_set_testnet(struct lightningd *ld)
{
return opt_set_network("testnet", ld);
}
static char *opt_set_mainnet(struct lightningd *ld)
{
return opt_set_network("bitcoin", ld);
}
static void opt_show_network(char buf[OPT_SHOW_LEN],
const struct lightningd *ld)
{
snprintf(buf, OPT_SHOW_LEN, "%s", get_chainparams(ld)->network_name);
}
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`:`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)
{
plugin_register(ld->plugins, arg);
return NULL;
}
static char *opt_disable_plugin(const char *arg, struct lightningd *ld)
{
if (plugin_remove(ld->plugins, arg))
return NULL;
return tal_fmt(NULL, "Could not find plugin %s", arg);
}
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 void config_register_opts(struct lightningd *ld)
{
opt_register_early_arg("--conf=<file>", opt_set_talstr, NULL,
&ld->config_filename,
"Specify configuration file. Relative paths will be prefixed by lightning-dir location. (default: config)");
/* 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_noarg("--daemon", opt_set_bool, &ld->daemon,
"Run in the background, suppress stdout/stderr");
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("--commit-fee=<percent>", opt_set_u32, opt_show_u32,
&ld->config.commitment_fee_percent,
"Percentage of fee to request for their commitment");
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("--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_early_arg("--network", opt_set_network, opt_show_network,
ld,
"Select the network parameters (bitcoin, testnet,"
" regtest, litecoin or litecoin-testnet)");
opt_register_early_noarg("--testnet", opt_set_testnet, ld,
"Alias for --network=testnet");
opt_register_early_noarg("--mainnet", opt_set_mainnet, ld,
"Alias for --network=bitcoin");
opt_register_early_arg("--allow-deprecated-apis",
opt_set_bool_arg, opt_show_bool,
&deprecated_apis,
"Enable deprecated options, JSONRPC commands, fields, etc.");
opt_register_arg("--autocleaninvoice-cycle",
opt_set_u64, opt_show_u64,
&ld->ini_autocleaninvoice_cycle,
"Perform cleanup of expired invoices every given seconds, or do not autoclean if 0");
opt_register_arg("--autocleaninvoice-expired-by",
opt_set_u64, opt_show_u64,
&ld->ini_autocleaninvoice_expiredby,
"If expired invoice autoclean enabled, invoices that have expired for at least this given seconds are cleaned");
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");
/* 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");
opt_register_noarg("--disable-dns", opt_set_invbool, &ld->config.use_dns,
"Disable DNS lookups of peers");
#if DEVELOPER
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.");
#endif
}
#if DEVELOPER
static char *opt_subprocess_debug(const char *optarg, struct lightningd *ld)
{
ld->dev_debug_subprocess = optarg;
return NULL;
}
static char *opt_set_dev_unknown_channel_satoshis(const char *optarg,
struct lightningd *ld)
{
tal_free(ld->dev_unknown_channel_satoshis);
ld->dev_unknown_channel_satoshis = tal(ld, struct amount_sat);
return opt_set_u64(optarg,
&ld->dev_unknown_channel_satoshis->satoshis); /* Raw: dev code */
}
static void dev_register_opts(struct lightningd *ld)
{
opt_register_noarg("--dev-no-reconnect", opt_set_invbool,
&ld->reconnect,
"Disable automatic reconnect attempts");
opt_register_noarg("--dev-fail-on-subdaemon-fail", opt_set_bool,
&ld->dev_subdaemon_fail, opt_hidden);
opt_register_early_arg("--dev-debugger=<subprocess>", opt_subprocess_debug, NULL,
ld, "Invoke gdb at start of <subprocess>");
opt_register_arg("--dev-broadcast-interval=<ms>", opt_set_uintval,
opt_show_uintval, &ld->config.broadcast_interval_msec,
"Time between gossip broadcasts in milliseconds");
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_arg("--dev-max-fee-multiplier", opt_set_u32, opt_show_u32,
&ld->config.max_fee_multiplier,
"Allow the fee proposed by the remote end to be up to "
"multiplier times higher than our own. Small values "
"will cause channels to be closed more often due to "
"fee fluctuations, large values may result in large "
"fees.");
opt_register_arg(
"--dev-channel-update-interval=<s>", opt_set_u32, opt_show_u32,
&ld->config.channel_update_interval,
"Time in seconds between channel updates for our own channels.");
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-unknown-channel-satoshis",
opt_set_dev_unknown_channel_satoshis, NULL, ld,
"Amount to pretend is in channels which we can't find funding tx for.");
}
#endif
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,
/* We offer to pay 5 times 2-block fee */
.commitment_fee_percent = 500,
/* 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,
/* BOLT #7:
*
* - SHOULD flush outgoing gossip messages once every 60
* seconds, independently of the arrival times of the messages.
*/
.broadcast_interval_msec = 60000,
/* Send a keepalive update at least every week, prune every twice that */
.channel_update_interval = 1209600/2,
/* Testnet sucks */
.ignore_fee_limits = true,
/* Rescan 5 hours of blocks on testnet, it's reorg happy */
.rescan = 30,
/* Fees may be in the range our_fee - 10*our_fee */
.max_fee_multiplier = 10,
.use_dns = true,
/* Sets min_effective_htlc_capacity - at 1000$/BTC this is 10ct */
.min_capacity_sat = 10000,
};
/* aka. "Dude, where's my coins?" */
static const struct config mainnet_config = {
/* ~one day to catch cheating attempts. */
.locktime_blocks = 6 * 24,
/* They can have up to 14 days, maximumu value that lnd will ask for by default. */
/* FIXME Convince lnd to use more reasonable defaults... */
.locktime_max = 14 * 24 * 6,
/* We're fairly trusting, under normal circumstances. */
.anchor_confirms = 3,
/* Insist between 2 and 20 times the 2-block fee. */
.commitment_fee_min_percent = 200,
.commitment_fee_max_percent = 2000,
/* We offer to pay 5 times 2-block fee */
.commitment_fee_percent = 500,
/* BOLT #2:
*
* 1. the `cltv_expiry_delta` for channels, `3R+2G+2S`: if in doubt, a
* `cltv_expiry_delta` of 12 is reasonable (R=2, G=1, S=2)
*/
/* R = 2, G = 1, S = 3 */
.cltv_expiry_delta = 14,
/* BOLT #2:
*
* 4. the minimum `cltv_expiry` accepted for terminal payments: the
* worst case for the terminal node C is `2R+G+S` blocks */
.cltv_final = 10,
/* Send commit 10msec after receiving; almost immediately. */
.commit_time_ms = 10,
/* Discourage dust payments */
.fee_base = 1000,
/* Take 0.001% */
.fee_per_satoshi = 10,
/* BOLT #7:
*
* - SHOULD flush outgoing gossip messages once every 60
* seconds, independently of the arrival times of the messages.
*/
.broadcast_interval_msec = 60000,
/* Send a keepalive update at least every week, prune every twice that */
.channel_update_interval = 1209600/2,
/* Mainnet should have more stable fees */
.ignore_fee_limits = false,
/* Rescan 2.5 hours of blocks on startup, it's not so reorg happy */
.rescan = 15,
/* Fees may be in the range our_fee - 10*our_fee */
.max_fee_multiplier = 10,
.use_dns = true,
/* Sets min_effective_htlc_capacity - at 1000$/BTC this is 10ct */
.min_capacity_sat = 10000,
};
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);
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 void setup_default_config(struct lightningd *ld)
{
if (get_chainparams(ld)->testnet)
ld->config = testnet_config;
else
ld->config = mainnet_config;
/* Set default PID file name to be per-network */
tal_free(ld->pidfile);
ld->pidfile = tal_fmt(ld, "lightningd-%s.pid", get_chainparams(ld)->network_name);
}
/* FIXME: make this nicer! */
static int config_parse_line_number = 0;
static void config_log_stderr_exit(const char *fmt, ...)
{
char *msg;
va_list ap;
va_start(ap, fmt);
/* This is the format we expect:*/
if (streq(fmt, "%s: %.*s: %s")) {
const char *argv0 = va_arg(ap, const char *);
unsigned int len = va_arg(ap, unsigned int);
const char *arg = va_arg(ap, const char *);
const char *problem = va_arg(ap, const char *);
assert(argv0 != NULL);
assert(arg != NULL);
assert(problem != NULL);
/*mangle it to remove '--' and add the line number.*/
msg = tal_fmt(NULL, "%s line %d: %.*s: %s",
argv0, config_parse_line_number, len-2, arg+2, problem);
} else {
msg = tal_vfmt(NULL, fmt, ap);
}
va_end(ap);
fatal("%s", msg);
}
/**
* We turn the config file into cmdline arguments. @early tells us
* whether to parse early options only, or the non-early options.
*/
static void opt_parse_from_config(struct lightningd *ld, bool early)
{
char *contents, **lines;
char **all_args; /*For each line: either argument string or NULL*/
char *argv[3];
int i, argc;
char *filename;
if (ld->config_filename != NULL)
filename = ld->config_filename;
else
filename = path_join(tmpctx, ld->config_dir, "config");
contents = grab_file(ld, filename);
/* The default config doesn't have to exist, but if the config was
* specified on the command line it has to exist. */
if (!contents) {
if ((errno != ENOENT) || (ld->config_filename != NULL))
fatal("Opening and reading %s: %s",
filename, strerror(errno));
/* Now we can set up defaults, since no config file. */
setup_default_config(ld);
return;
}
lines = tal_strsplit(contents, contents, "\r\n", STR_NO_EMPTY);
/* We have to keep all_args around, since opt will point into it */
all_args = notleak(tal_arr(ld, char *, tal_count(lines) - 1));
for (i = 0; i < tal_count(lines) - 1; i++) {
if (strstarts(lines[i], "#")) {
all_args[i] = NULL;
}
else {
/* Only valid forms are "foo" and "foo=bar" */
all_args[i] = tal_fmt(all_args, "--%s", lines[i]);
}
}
/*
For each line we construct a fake argc,argv commandline.
argv[1] is the only element that changes between iterations.
*/
argc = 2;
argv[0] = "lightning config file";
argv[argc] = NULL;
if (early) {
for (i = 0; i < tal_count(all_args); i++) {
if (all_args[i] != NULL) {
config_parse_line_number = i + 1;
argv[1] = all_args[i];
opt_early_parse_incomplete(argc, argv,
config_log_stderr_exit);
}
}
/* Now we can set up defaults, depending on whether testnet or
* not */
setup_default_config(ld);
} else {
for (i = 0; i < tal_count(all_args); i++) {
if (all_args[i] != NULL) {
config_parse_line_number = i + 1;
argv[1] = all_args[i];
opt_parse(&argc, argv, config_log_stderr_exit);
argc = 2; /* opt_parse might have changed it */
}
}
}
tal_free(contents);
}
static char *test_subdaemons_and_exit(struct lightningd *ld)
{
test_subdaemons(ld);
exit(0);
return NULL;
}
static char *opt_lightningd_usage(struct lightningd *ld)
{
/* Reload config so that --help has the correct network defaults
* to display before it exits */
setup_default_config(ld);
char *extra = tal_fmt(NULL, "\nA bitcoin lightning daemon (default "
"values shown for network: %s).",
get_chainparams(ld)->network_name);
opt_usage_and_exit(extra);
tal_free(extra);
return NULL;
}
void register_opts(struct lightningd *ld)
{
opt_set_alloc(opt_allocfn, tal_reallocfn, tal_freefn);
opt_register_noarg("--help|-h", opt_lightningd_usage, ld,
"Print this message.");
opt_register_early_noarg("--test-daemons-only",
test_subdaemons_and_exit,
ld, opt_hidden);
opt_register_arg("--bitcoin-datadir", opt_set_talstr, NULL,
&ld->topology->bitcoind->datadir,
"-datadir arg for bitcoin-cli");
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("--bitcoin-cli", opt_set_talstr, NULL,
&ld->topology->bitcoind->cli,
"bitcoin-cli pathname");
opt_register_arg("--bitcoin-rpcuser", opt_set_talstr, NULL,
&ld->topology->bitcoind->rpcuser,
"bitcoind RPC username");
opt_register_arg("--bitcoin-rpcpassword", opt_set_talstr, NULL,
&ld->topology->bitcoind->rpcpass,
"bitcoind RPC password");
opt_register_arg("--bitcoin-rpcconnect", opt_set_talstr, NULL,
&ld->topology->bitcoind->rpcconnect,
"bitcoind RPC host to connect to");
opt_register_arg("--bitcoin-rpcport", opt_set_talstr, NULL,
&ld->topology->bitcoind->rpcport,
"bitcoind RPC port");
opt_register_arg("--pid-file=<file>", opt_set_talstr, opt_show_charp,
&ld->pidfile,
"Specify pid file");
opt_register_logging(ld);
opt_register_version();
configdir_register_opts(ld, &ld->config_dir, &ld->rpc_filename);
config_register_opts(ld);
#if DEVELOPER
dev_register_opts(ld);
#endif
}
/* 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],
codename_noun[noun]);
#if DEVELOPER
assert(strlen(name) < 32);
int taillen = 31 - strlen(name);
if (taillen > strlen(version()))
taillen = strlen(version());
/* Fit as much of end of version() as possible */
tal_append_fmt(&name, "-%s",
version() + strlen(version()) - taillen);
#endif
assert(strlen(name) <= 32);
ld->alias = tal_arrz(ld, u8, 33);
strcpy((char*)ld->alias, name);
tal_free(name);
}
}
void handle_early_opts(struct lightningd *ld, int argc, char *argv[])
{
/* Load defaults. The actual values loaded here will be overwritten
* later by opt_parse_from_config. */
setup_default_config(ld);
/* Get any configdir/testnet options first. */
opt_early_parse_incomplete(argc, argv, opt_log_stderr_exit);
/* Now look for config file, but only handle the early
* options, others may be added on-demand */
opt_parse_from_config(ld, true);
}
void handle_opts(struct lightningd *ld, int argc, char *argv[])
{
/* Now look for config file, but only handle non-early
* options, early ones have been parsed in
* handle_early_opts */
opt_parse_from_config(ld, false);
/* Move to config dir, to save ourselves the hassle of path manip. */
if (chdir(ld->config_dir) != 0) {
log_unusual(ld->log, "Creating configuration directory %s",
ld->config_dir);
if (mkdir(ld->config_dir, 0700) != 0)
fatal("Could not make directory %s: %s",
ld->config_dir, strerror(errno));
if (chdir(ld->config_dir) != 0)
fatal("Could not change directory %s: %s",
ld->config_dir, strerror(errno));
}
opt_parse(&argc, argv, opt_log_stderr_exit);
if (argc != 1)
errx(1, "no arguments accepted");
/* We keep a separate variable rather than overriding use_proxy_always,
* so listconfigs shows the correct thing. */
if (tal_count(ld->proposed_wireaddr) != 0
&& all_tor_addresses(ld->proposed_wireaddr)) {
ld->pure_tor_setup = true;
if (!ld->proxyaddr)
log_info(ld->log, "Pure Tor setup with no --proxy:"
" you won't be able to make connections out");
}
check_config(ld);
}
/* FIXME: This is a hack! Expose somehow in ccan/opt.*/
/* Returns string after first '-'. */
static const char *first_name(const char *names, unsigned *len)
{
*len = strcspn(names + 1, "|= ");
return names + 1;
}
static const char *next_name(const char *names, unsigned *len)
{
names += *len;
if (names[0] == ' ' || names[0] == '=' || names[0] == '\0')
return NULL;
return first_name(names + 1, len);
}
static void json_add_opt_addrs(struct json_stream *response,
const char *name0,
const struct wireaddr_internal *wireaddrs,
const enum addr_listen_announce *listen_announce,
enum addr_listen_announce ala)
{
for (size_t i = 0; i < tal_count(wireaddrs); i++) {
if (listen_announce[i] != ala)
continue;
json_add_string(response,
name0,
fmt_wireaddr_internal(name0, wireaddrs+i));
}
}
static void add_config(struct lightningd *ld,
struct json_stream *response,
const struct opt_table *opt,
const char *name, size_t len)
{
char *name0 = tal_strndup(response, name, len);
const char *answer = NULL;
if (opt->type & OPT_NOARG) {
if (opt->cb == (void *)opt_usage_and_exit
|| opt->cb == (void *)version_and_exit
/* These two show up as --network= */
|| opt->cb == (void *)opt_set_testnet
|| opt->cb == (void *)opt_set_mainnet
|| opt->cb == (void *)opt_lightningd_usage
|| opt->cb == (void *)test_subdaemons_and_exit
/* FIXME: we can't recover this. */
|| opt->cb == (void *)opt_clear_plugins) {
/* These are not important */
} else if (opt->cb == (void *)opt_set_bool) {
const bool *b = opt->u.carg;
answer = tal_fmt(name0, "%s", *b ? "true" : "false");
} else if (opt->cb == (void *)opt_set_invbool) {
const bool *b = opt->u.carg;
answer = tal_fmt(name0, "%s", !*b ? "true" : "false");
} else if (opt->cb == (void *)opt_set_offline) {
answer = tal_fmt(name0, "%s",
(!ld->reconnect && !ld->listen)
? "true" : "false");
} else {
/* Insert more decodes here! */
assert(!"A noarg option was added but was not handled");
}
} else if (opt->type & OPT_HASARG) {
if (opt->desc == opt_hidden) {
/* Ignore hidden options (deprecated) */
} else if (opt->show) {
char *buf = tal_arr(name0, char, OPT_SHOW_LEN+1);
opt->show(buf, opt->u.carg);
if (streq(buf, "true") || streq(buf, "false")
|| strspn(buf, "0123456789.") == strlen(buf)) {
/* Let pure numbers and true/false through as
* literals. */
json_add_literal(response, name0,
buf, strlen(buf));
return;
}
/* opt_show_charp surrounds with "", strip them */
if (strstarts(buf, "\"")) {
buf[strlen(buf)-1] = '\0';
answer = buf + 1;
} else
answer = buf;
} else if (opt->cb_arg == (void *)opt_set_talstr
|| opt->cb_arg == (void *)opt_set_charp) {
const char *arg = *(char **)opt->u.carg;
if (arg)
answer = tal_fmt(name0, "%s", arg);
} else if (opt->cb_arg == (void *)opt_set_rgb) {
if (ld->rgb)
answer = tal_hexstr(name0, ld->rgb, 3);
} else if (opt->cb_arg == (void *)opt_set_alias) {
answer = (const char *)ld->alias;
} else if (opt->cb_arg == (void *)arg_log_to_file) {
answer = ld->logfile;
} else if (opt->cb_arg == (void *)opt_add_addr) {
json_add_opt_addrs(response, name0,
ld->proposed_wireaddr,
ld->proposed_listen_announce,
ADDR_LISTEN_AND_ANNOUNCE);
return;
} else if (opt->cb_arg == (void *)opt_add_bind_addr) {
json_add_opt_addrs(response, name0,
ld->proposed_wireaddr,
ld->proposed_listen_announce,
ADDR_LISTEN);
return;
} else if (opt->cb_arg == (void *)opt_add_announce_addr) {
json_add_opt_addrs(response, name0,
ld->proposed_wireaddr,
ld->proposed_listen_announce,
ADDR_ANNOUNCE);
return;
} else if (opt->cb_arg == (void *)opt_add_proxy_addr) {
if (ld->proxyaddr)
answer = fmt_wireaddr(name0, ld->proxyaddr);
} else if (opt->cb_arg == (void *)opt_add_plugin) {
json_add_opt_plugins(response, ld->plugins);
} else if (opt->cb_arg == (void *)opt_add_plugin_dir
|| opt->cb_arg == (void *)opt_disable_plugin
|| opt->cb_arg == (void *)plugin_opt_set) {
/* FIXME: We actually treat it as if they specified
* --plugin for each one, so ignore these */
#if DEVELOPER
} else if (strstarts(name, "dev-")) {
/* Ignore dev settings */
#endif
} else {
/* Insert more decodes here! */
abort();
}
}
if (answer) {
struct json_escaped *esc = json_escape(NULL, answer);
json_add_escaped_string(response, name0, take(esc));
}
tal_free(name0);
}
static struct command_result *json_listconfigs(struct command *cmd,
const char *buffer,
const jsmntok_t *obj UNNEEDED,
const jsmntok_t *params)
{
size_t i;
struct json_stream *response = NULL;
const jsmntok_t *configtok;
if (!param(cmd, buffer, params,
p_opt("config", param_tok, &configtok),
NULL))
return command_param_failed();
if (!configtok) {
response = json_stream_success(cmd);
json_object_start(response, NULL);
json_add_string(response, "# version", version());
}
for (i = 0; i < opt_count; i++) {
unsigned int len;
const char *name;
/* FIXME: Print out comment somehow? */
if (opt_table[i].type == OPT_SUBTABLE)
continue;
for (name = first_name(opt_table[i].names, &len);
name;
name = next_name(name, &len)) {
/* Skips over first -, so just need to look for one */
if (name[0] != '-')
continue;
if (configtok
&& !memeq(buffer + configtok->start,
configtok->end - configtok->start,
name + 1, len - 1))
continue;
if (!response) {
response = json_stream_success(cmd);
json_object_start(response, NULL);
}
add_config(cmd->ld, response, &opt_table[i],
name+1, len-1);
}
}
if (configtok && !response) {
return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
"Unknown config option '%.*s'",
json_tok_full_len(configtok),
json_tok_full(buffer, configtok));
}
json_object_end(response);
return command_success(cmd, response);
}
static const struct json_command listconfigs_command = {
"listconfigs",
json_listconfigs,
"List all configuration options, or with [config], just that one.",
.verbose = "listconfigs [config]\n"
"Outputs an object, with each field a config options\n"
"(Option names which start with # are comments)\n"
"With [config], object only has that field"
};
AUTODATA(json_command, &listconfigs_command);
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