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499 lines
15 KiB
499 lines
15 KiB
#include "daemon/bitcoind.h"
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#include "daemon/configdir.h"
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#include "daemon/lightningd.h"
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#include "daemon/log.h"
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#include "daemon/opt_time.h"
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#include "daemon/options.h"
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#include "daemon/routing.h"
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#include "version.h"
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#include <ccan/err/err.h>
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#include <ccan/opt/opt.h>
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#include <ccan/short_types/short_types.h>
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#include <ccan/tal/grab_file/grab_file.h>
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#include <ccan/tal/str/str.h>
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#include <errno.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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/* Tal wrappers for opt. */
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static void *opt_allocfn(size_t size)
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{
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return tal_alloc_(NULL, size, false, false, TAL_LABEL("opt_allocfn", ""));
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}
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static void *tal_reallocfn(void *ptr, size_t size)
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{
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if (!ptr)
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return opt_allocfn(size);
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tal_resize_(&ptr, 1, size, false);
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return ptr;
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}
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static void tal_freefn(void *ptr)
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{
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tal_free(ptr);
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}
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/* FIXME: Put into ccan/time. */
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#define TIME_FROM_SEC(sec) { { .tv_nsec = 0, .tv_sec = sec } }
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#define TIME_FROM_MSEC(msec) \
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{ { .tv_nsec = ((msec) % 1000) * 1000000, .tv_sec = (msec) / 1000 } }
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static char *opt_set_u64(const char *arg, u64 *u)
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{
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char *endp;
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unsigned long long l;
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/* This is how the manpage says to do it. Yech. */
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errno = 0;
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l = strtoull(arg, &endp, 0);
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if (*endp || !arg[0])
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return tal_fmt(NULL, "'%s' is not a number", arg);
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*u = l;
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if (errno || *u != l)
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return tal_fmt(NULL, "'%s' is out of range", arg);
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return NULL;
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}
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static char *opt_set_u32(const char *arg, u32 *u)
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{
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char *endp;
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unsigned long l;
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/* This is how the manpage says to do it. Yech. */
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errno = 0;
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l = strtoul(arg, &endp, 0);
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if (*endp || !arg[0])
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return tal_fmt(NULL, "'%s' is not a number", arg);
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*u = l;
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if (errno || *u != l)
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return tal_fmt(NULL, "'%s' is out of range", arg);
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return NULL;
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}
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static char *opt_set_u16(const char *arg, u16 *u)
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{
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char *endp;
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unsigned long l;
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/* This is how the manpage says to do it. Yech. */
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errno = 0;
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l = strtoul(arg, &endp, 0);
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if (*endp || !arg[0])
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return tal_fmt(NULL, "'%s' is not a number", arg);
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*u = l;
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if (errno || *u != l)
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return tal_fmt(NULL, "'%s' is out of range", arg);
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return NULL;
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}
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static char *opt_set_s32(const char *arg, s32 *u)
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{
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char *endp;
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long l;
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/* This is how the manpage says to do it. Yech. */
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errno = 0;
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l = strtol(arg, &endp, 0);
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if (*endp || !arg[0])
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return tal_fmt(NULL, "'%s' is not a number", arg);
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*u = l;
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if (errno || *u != l)
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return tal_fmt(NULL, "'%s' is out of range", arg);
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return NULL;
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}
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static void opt_show_u64(char buf[OPT_SHOW_LEN], const u64 *u)
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{
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snprintf(buf, OPT_SHOW_LEN, "%"PRIu64, *u);
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}
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static void opt_show_u32(char buf[OPT_SHOW_LEN], const u32 *u)
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{
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snprintf(buf, OPT_SHOW_LEN, "%"PRIu32, *u);
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}
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static void opt_show_s32(char buf[OPT_SHOW_LEN], const s32 *u)
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{
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snprintf(buf, OPT_SHOW_LEN, "%"PRIi32, *u);
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}
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static void opt_show_u16(char buf[OPT_SHOW_LEN], const u16 *u)
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{
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snprintf(buf, OPT_SHOW_LEN, "%u", *u);
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}
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static void config_register_opts(struct lightningd_state *dstate)
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{
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opt_register_noarg("--bitcoind-regtest", opt_set_bool,
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&dstate->config.regtest,
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"Bitcoind is in regtest mode");
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opt_register_arg("--locktime-blocks", opt_set_u32, opt_show_u32,
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&dstate->config.locktime_blocks,
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"Blocks before peer can unilaterally spend funds");
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opt_register_arg("--max-locktime-blocks", opt_set_u32, opt_show_u32,
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&dstate->config.locktime_max,
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"Maximum seconds peer can lock up our funds");
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opt_register_arg("--anchor-onchain", opt_set_u32, opt_show_u32,
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&dstate->config.anchor_onchain_wait,
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"Blocks before we give up on pending anchor transaction");
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opt_register_arg("--anchor-confirms", opt_set_u32, opt_show_u32,
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&dstate->config.anchor_confirms,
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"Confirmations required for anchor transaction");
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opt_register_arg("--max-anchor-confirms", opt_set_u32, opt_show_u32,
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&dstate->config.anchor_confirms_max,
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"Maximum confirmations other side can wait for anchor transaction");
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opt_register_arg("--forever-confirms", opt_set_u32, opt_show_u32,
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&dstate->config.forever_confirms,
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"Confirmations after which we consider a reorg impossible");
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opt_register_arg("--commit-fee-min=<percent>", opt_set_u32, opt_show_u32,
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&dstate->config.commitment_fee_min_percent,
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"Minimum percentage of fee to accept for commitment");
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opt_register_arg("--commit-fee-max=<percent>", opt_set_u32, opt_show_u32,
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&dstate->config.commitment_fee_max_percent,
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"Maximum percentage of fee to accept for commitment (0 for unlimited)");
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opt_register_arg("--commit-fee=<percent>", opt_set_u32, opt_show_u32,
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&dstate->config.commitment_fee_percent,
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"Percentage of fee to request for their commitment");
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opt_register_arg("--override-fee-rate", opt_set_u64, opt_show_u64,
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&dstate->config.override_fee_rate,
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"Force a specific rate in satoshis per kb regardless of estimated fees");
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opt_register_arg("--default-fee-rate", opt_set_u64, opt_show_u64,
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&dstate->config.default_fee_rate,
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"Satoshis per kb if can't estimate fees");
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opt_register_arg("--min-htlc-expiry", opt_set_u32, opt_show_u32,
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&dstate->config.min_htlc_expiry,
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"Minimum number of blocks to accept an HTLC before expiry");
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opt_register_arg("--max-htlc-expiry", opt_set_u32, opt_show_u32,
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&dstate->config.max_htlc_expiry,
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"Maximum number of blocks to accept an HTLC before expiry");
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opt_register_arg("--deadline-blocks", opt_set_u32, opt_show_u32,
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&dstate->config.deadline_blocks,
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"Number of blocks before HTLC timeout before we drop connection");
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opt_register_arg("--bitcoind-poll", opt_set_time, opt_show_time,
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&dstate->config.poll_time,
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"Time between polling for new transactions");
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opt_register_arg("--commit-time", opt_set_time, opt_show_time,
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&dstate->config.commit_time,
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"Time after changes before sending out COMMIT");
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opt_register_arg("--fee-base", opt_set_u32, opt_show_u32,
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&dstate->config.fee_base,
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"Millisatoshi minimum to charge for HTLC");
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opt_register_arg("--fee-per-satoshi", opt_set_s32, opt_show_s32,
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&dstate->config.fee_per_satoshi,
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"Microsatoshi fee for every satoshi in HTLC");
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opt_register_arg("--add-route", opt_add_route, NULL,
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dstate,
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"Add route of form srcid/dstid/base/var/delay/minblocks"
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"(base in millisatoshi, var in millionths of satoshi per satoshi)");
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opt_register_noarg("--disable-irc", opt_set_invbool,
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&dstate->config.use_irc,
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"Disable IRC peer discovery for routing");
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opt_register_noarg("--ignore-dbversion", opt_set_bool,
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&dstate->config.db_version_ignore,
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"Continue despite invalid database version (DANGEROUS!)");
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}
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static void dev_register_opts(struct lightningd_state *dstate)
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{
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opt_register_noarg("--dev-no-routefail", opt_set_bool,
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&dstate->dev_never_routefail, opt_hidden);
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opt_register_noarg("--dev-no-broadcast", opt_set_bool,
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&dstate->dev_no_broadcast, opt_hidden);
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}
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static const struct config testnet_config = {
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/* 6 blocks to catch cheating attempts. */
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.locktime_blocks = 6,
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/* They can have up to 3 days. */
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.locktime_max = 3 * 6 * 24,
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/* Testnet can have long runs of empty blocks. */
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.anchor_onchain_wait = 100,
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/* We're fairly trusting, under normal circumstances. */
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.anchor_confirms = 1,
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/* More than 10 confirms seems overkill. */
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.anchor_confirms_max = 10,
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/* At some point, you've got to let it go... */
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/* BOLT #onchain:
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*
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* Outputs... are considered *irrevocably resolved* once they
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* are included in a block at least 100 deep on the most-work
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* blockchain. 100 blocks is far greater than the longest
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* known bitcoin fork, and the same value used to wait for
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* confirmations of miner's rewards[1].
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*/
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.forever_confirms = 10,
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/* Testnet fees are crazy, allow infinite feerange. */
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.commitment_fee_min_percent = 0,
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.commitment_fee_max_percent = 0,
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/* We offer to pay 5 times 2-block fee */
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.commitment_fee_percent = 500,
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/* Use this rate, if specified, regardless of what estimatefee says. */
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.override_fee_rate = 0,
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/* Use this rate by default if estimatefee doesn't estimate. */
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.default_fee_rate = 40000,
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/* Don't bother me unless I have 6 hours to collect. */
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.min_htlc_expiry = 6 * 6,
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/* Don't lock up channel for more than 5 days. */
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.max_htlc_expiry = 5 * 6 * 24,
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/* If we're closing on HTLC expiry, and you're unresponsive, we abort. */
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.deadline_blocks = 4,
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/* How often to bother bitcoind. */
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.poll_time = TIME_FROM_SEC(10),
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/* Send commit 10msec after receiving; almost immediately. */
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.commit_time = TIME_FROM_MSEC(10),
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/* Allow dust payments */
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.fee_base = 1,
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/* Take 0.001% */
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.fee_per_satoshi = 10,
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/* Discover new peers using IRC */
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.use_irc = true,
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/* Don't ignore database version */
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.db_version_ignore = false,
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};
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/* aka. "Dude, where's my coins?" */
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static const struct config mainnet_config = {
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/* ~one day to catch cheating attempts. */
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.locktime_blocks = 6 * 24,
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/* They can have up to 3 days. */
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.locktime_max = 3 * 6 * 24,
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/* You should get in within 10 blocks. */
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.anchor_onchain_wait = 10,
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/* We're fairly trusting, under normal circumstances. */
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.anchor_confirms = 3,
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/* More than 10 confirms seems overkill. */
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.anchor_confirms_max = 10,
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/* At some point, you've got to let it go... */
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/* BOLT #onchain:
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*
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* Outputs... are considered *irrevocably resolved* once they
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* are included in a block at least 100 deep on the most-work
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* blockchain. 100 blocks is far greater than the longest
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* known bitcoin fork, and the same value used to wait for
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* confirmations of miner's rewards[1].
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*/
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.forever_confirms = 100,
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/* Insist between 2 and 20 times the 2-block fee. */
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.commitment_fee_min_percent = 200,
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.commitment_fee_max_percent = 2000,
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/* We offer to pay 5 times 2-block fee */
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.commitment_fee_percent = 500,
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/* Use this rate, if specified, regardless of what estimatefee says. */
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.override_fee_rate = 0,
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/* Use this rate by default if estimatefee doesn't estimate. */
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.default_fee_rate = 40000,
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/* Don't bother me unless I have 6 hours to collect. */
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.min_htlc_expiry = 6 * 6,
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/* Don't lock up channel for more than 5 days. */
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.max_htlc_expiry = 5 * 6 * 24,
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/* If we're closing on HTLC expiry, and you're unresponsive, we abort. */
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.deadline_blocks = 10,
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/* How often to bother bitcoind. */
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.poll_time = TIME_FROM_SEC(30),
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/* Send commit 10msec after receiving; almost immediately. */
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.commit_time = TIME_FROM_MSEC(10),
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/* Discourage dust payments */
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.fee_base = 546000,
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/* Take 0.001% */
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.fee_per_satoshi = 10,
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/* Discover new peers using IRC */
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.use_irc = true,
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/* Don't ignore database version */
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.db_version_ignore = false,
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};
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static void check_config(struct lightningd_state *dstate)
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{
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/* We do this by ensuring it's less than the minimum we would accept. */
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if (dstate->config.commitment_fee_max_percent != 0
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&& dstate->config.commitment_fee_max_percent
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< dstate->config.commitment_fee_min_percent)
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fatal("Commitment fee invalid min-max %u-%u",
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dstate->config.commitment_fee_min_percent,
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dstate->config.commitment_fee_max_percent);
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if (dstate->config.forever_confirms < 100 && !dstate->testnet)
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log_unusual(dstate->base_log,
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"Warning: forever-confirms of %u is less than 100!",
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dstate->config.forever_confirms);
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if (dstate->config.anchor_confirms == 0)
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fatal("anchor-confirms must be greater than zero");
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/* BOLT #2:
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*
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* a node MUST estimate the deadline for successful redemption
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* for each HTLC it offers. A node MUST NOT offer a HTLC
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* after this deadline */
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if (dstate->config.deadline_blocks >= dstate->config.min_htlc_expiry)
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fatal("Deadline %u can't be more than minimum expiry %u",
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dstate->config.deadline_blocks,
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dstate->config.min_htlc_expiry);
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}
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static void setup_default_config(struct lightningd_state *dstate)
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{
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if (dstate->testnet)
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dstate->config = testnet_config;
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else
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dstate->config = mainnet_config;
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}
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/* FIXME: make this nicer! */
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static void config_log_stderr_exit(const char *fmt, ...)
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{
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char *msg;
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va_list ap;
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va_start(ap, fmt);
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/* This is the format we expect: mangle it to remove '--'. */
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if (streq(fmt, "%s: %.*s: %s")) {
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const char *argv0 = va_arg(ap, const char *);
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unsigned int len = va_arg(ap, unsigned int);
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const char *arg = va_arg(ap, const char *);
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const char *problem = va_arg(ap, const char *);
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msg = tal_fmt(NULL, "%s line %s: %.*s: %s",
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argv0, arg+strlen(arg)+1, len-2, arg+2, problem);
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} else {
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msg = tal_vfmt(NULL, fmt, ap);
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}
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va_end(ap);
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fatal("%s", msg);
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}
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/* We turn the config file into cmdline arguments. */
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static void opt_parse_from_config(struct lightningd_state *dstate)
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{
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char *contents, **lines;
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char **argv;
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int i, argc;
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contents = grab_file(dstate, "config");
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/* Doesn't have to exist. */
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if (!contents) {
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if (errno != ENOENT)
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fatal("Opening and reading config: %s",
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strerror(errno));
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/* Now we can set up defaults, since no config file. */
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setup_default_config(dstate);
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return;
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}
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lines = tal_strsplit(contents, contents, "\r\n", STR_NO_EMPTY);
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/* We have to keep argv around, since opt will point into it */
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argv = tal_arr(dstate, char *, argc = 1);
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argv[0] = "lightning config file";
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for (i = 0; i < tal_count(lines) - 1; i++) {
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if (strstarts(lines[i], "#"))
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continue;
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/* Only valid forms are "foo" and "foo=bar" */
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tal_resize(&argv, argc+1);
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/* Stash line number after nul. */
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argv[argc++] = tal_fmt(argv, "--%s%c%u", lines[i], 0, i+1);
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}
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tal_resize(&argv, argc+1);
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argv[argc] = NULL;
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opt_early_parse(argc, argv, config_log_stderr_exit);
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/* Now we can set up defaults, depending on whether testnet or not */
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setup_default_config(dstate);
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opt_parse(&argc, argv, config_log_stderr_exit);
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tal_free(contents);
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}
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bool handle_opts(struct lightningd_state *dstate, int argc, char *argv[])
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{
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bool newdir = false;
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opt_set_alloc(opt_allocfn, tal_reallocfn, tal_freefn);
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opt_register_noarg("--help|-h", opt_usage_and_exit,
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"\n"
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"A bitcoin lightning daemon.",
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"Print this message.");
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opt_register_arg("--port", opt_set_u16, opt_show_u16, &dstate->portnum,
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"Port to bind to (0 means don't listen)");
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opt_register_arg("--bitcoin-datadir", opt_set_charp, NULL,
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&bitcoin_datadir,
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"-datadir arg for bitcoin-cli");
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opt_register_logging(dstate->base_log);
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opt_register_version();
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configdir_register_opts(dstate,
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&dstate->config_dir, &dstate->rpc_filename);
|
|
config_register_opts(dstate);
|
|
dev_register_opts(dstate);
|
|
|
|
/* Get any configdir/testnet options first. */
|
|
opt_early_parse(argc, argv, opt_log_stderr_exit);
|
|
|
|
/* Move to config dir, to save ourselves the hassle of path manip. */
|
|
if (chdir(dstate->config_dir) != 0) {
|
|
log_unusual(dstate->base_log, "Creating lightningd dir %s"
|
|
" (because chdir gave %s)",
|
|
dstate->config_dir, strerror(errno));
|
|
if (mkdir(dstate->config_dir, 0700) != 0)
|
|
fatal("Could not make directory %s: %s",
|
|
dstate->config_dir, strerror(errno));
|
|
if (chdir(dstate->config_dir) != 0)
|
|
fatal("Could not change directory %s: %s",
|
|
dstate->config_dir, strerror(errno));
|
|
newdir = true;
|
|
}
|
|
|
|
/* Now look for config file */
|
|
opt_parse_from_config(dstate);
|
|
|
|
opt_parse(&argc, argv, opt_log_stderr_exit);
|
|
if (argc != 1)
|
|
errx(1, "no arguments accepted");
|
|
|
|
check_config(dstate);
|
|
return newdir;
|
|
}
|
|
|