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rgb-cln/daemon/lightningd.c

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#include "bitcoind.h"
#include "chaintopology.h"
#include "configdir.h"
#include "controlled_time.h"
#include "db.h"
#include "jsonrpc.h"
#include "lightningd.h"
#include "log.h"
#include "opt_time.h"
#include "peer.h"
#include "routing.h"
#include "secrets.h"
#include "timeout.h"
#include <ccan/container_of/container_of.h>
#include <ccan/err/err.h>
#include <ccan/io/io.h>
#include <ccan/opt/opt.h>
#include <ccan/tal/str/str.h>
#include <ccan/tal/tal.h>
#include <ccan/time/time.h>
#include <ccan/timer/timer.h>
#include <errno.h>
#include <inttypes.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <version.h>
static char *opt_set_u64(const char *arg, u64 *u)
{
char *endp;
unsigned long long l;
/* 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;
/* 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;
/* 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 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 config_register_opts(struct lightningd_state *dstate)
{
opt_register_arg("--locktime-blocks", opt_set_u32, opt_show_u32,
&dstate->config.locktime_blocks,
"Blocks before peer can unilaterally spend funds");
opt_register_arg("--max-locktime-blocks", opt_set_u32, opt_show_u32,
&dstate->config.locktime_max,
"Maximum seconds peer can lock up our funds");
opt_register_arg("--anchor-confirms", opt_set_u32, opt_show_u32,
&dstate->config.anchor_confirms,
"Confirmations required for anchor transaction");
opt_register_arg("--max-anchor-confirms", opt_set_u32, opt_show_u32,
&dstate->config.anchor_confirms_max,
"Maximum confirmations other side can wait for anchor transaction");
opt_register_arg("--forever-confirms", opt_set_u32, opt_show_u32,
&dstate->config.forever_confirms,
"Confirmations after which we consider a reorg impossible");
opt_register_arg("--commit-fee-min=<percent>", opt_set_u32, opt_show_u32,
&dstate->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,
&dstate->config.commitment_fee_max_percent,
"Maximum percentage of fee to accept for commitment");
opt_register_arg("--commit-fee=<percent>", opt_set_u32, opt_show_u32,
&dstate->config.commitment_fee_percent,
"Percentage of fee to request for their commitment");
opt_register_arg("--default-fee-rate", opt_set_u64, opt_show_u64,
&dstate->config.default_fee_rate,
"Satoshis per kb if can't estimate fees");
opt_register_arg("--min-htlc-expiry", opt_set_u32, opt_show_u32,
&dstate->config.min_htlc_expiry,
"Minimum number of blocks to accept an HTLC before expiry");
opt_register_arg("--max-htlc-expiry", opt_set_u32, opt_show_u32,
&dstate->config.max_htlc_expiry,
"Maximum number of blocks to accept an HTLC before expiry");
opt_register_arg("--deadline-blocks", opt_set_u32, opt_show_u32,
&dstate->config.deadline_blocks,
"Number of blocks before HTLC timeout before we drop connection");
opt_register_arg("--bitcoind-poll", opt_set_time, opt_show_time,
&dstate->config.poll_time,
"Time between polling for new transactions");
opt_register_arg("--commit-time", opt_set_time, opt_show_time,
&dstate->config.commit_time,
"Time after changes before sending out COMMIT");
opt_register_arg("--fee-base", opt_set_u32, opt_show_u32,
&dstate->config.fee_base,
"Millisatoshi minimum to charge for HTLC");
opt_register_arg("--fee-per-satoshi", opt_set_s32, opt_show_s32,
&dstate->config.fee_per_satoshi,
"Microsatoshi fee for every satoshi in HTLC");
opt_register_arg("--add-route", opt_add_route, NULL,
dstate,
"Add route of form srcid/dstid/base/var/delay/minblocks"
"(base in millisatoshi, var in millionths of satoshi per satoshi)");
}
static void dev_register_opts(struct lightningd_state *dstate)
{
controlled_time_register_opts();
opt_register_noarg("--dev-no-routefail", opt_set_bool,
&dstate->dev_never_routefail, opt_hidden);
}
static void default_config(struct config *config)
{
/* aka. "Dude, where's my coins?" */
config->testnet = true;
/* ~one day to catch cheating attempts. */
config->locktime_blocks = 6 * 24;
/* They can have up to 3 days. */
config->locktime_max = 3 * 6 * 24;
/* We're fairly trusting, under normal circumstances. */
config->anchor_confirms = 3;
/* More than 10 confirms seems overkill. */
config->anchor_confirms_max = 10;
/* At some point, you've got to let it go... */
/* BOLT #onchain:
*
* Outputs... are considered *irrevocably resolved* once they
* are included in a block at least 100 deep on the most-work
* blockchain. 100 blocks is far greater than the longest
* known bitcoin fork, and the same value used to wait for
* confirmations of miner's rewards[1].
*/
config->forever_confirms = 100;
/* Insist between 2 and 20 times the 2-block fee. */
config->commitment_fee_min_percent = 200;
config->commitment_fee_max_percent = 2000;
/* We offer to pay 5 times 2-block fee */
config->commitment_fee_percent = 500;
/* Use this rate by default if estimatefee doesn't estimate. */
config->default_fee_rate = 40000;
/* Don't bother me unless I have 6 hours to collect. */
config->min_htlc_expiry = 6 * 6;
/* Don't lock up channel for more than 5 days. */
config->max_htlc_expiry = 5 * 6 * 24;
/* If we're closing on HTLC expiry, and you're unresponsive, we abort. */
config->deadline_blocks = 10;
/* How often to bother bitcoind. */
config->poll_time = time_from_sec(30);
/* Send commit 10msec after receiving; almost immediately. */
config->commit_time = time_from_msec(10);
/* Discourage dust payments */
config->fee_base = 546000;
/* Take 0.001% */
config->fee_per_satoshi = 10;
}
static void check_config(struct lightningd_state *dstate)
{
/* We do this by ensuring it's less than the minimum we would accept. */
if (dstate->config.commitment_fee_max_percent
< dstate->config.commitment_fee_min_percent)
fatal("Commitment fee invalid min-max %u-%u",
dstate->config.commitment_fee_min_percent,
dstate->config.commitment_fee_max_percent);
if (dstate->config.forever_confirms < 100)
log_unusual(dstate->base_log,
"Warning: forever-confirms of %u is less than 100!",
dstate->config.forever_confirms);
/* BOLT #2:
*
* a node MUST estimate the deadline for successful redemption
* for each HTLC it offers. A node MUST NOT offer a HTLC
* after this deadline */
if (dstate->config.deadline_blocks >= dstate->config.min_htlc_expiry)
fatal("Deadline %u can't be more than minimum expiry %u",
dstate->config.deadline_blocks,
dstate->config.min_htlc_expiry);
}
static struct lightningd_state *lightningd_state(void)
{
struct lightningd_state *dstate = tal(NULL, struct lightningd_state);
dstate->log_record = new_log_record(dstate, 20*1024*1024, LOG_INFORM);
dstate->base_log = new_log(dstate, dstate->log_record,
"lightningd(%u):", (int)getpid());
list_head_init(&dstate->peers);
list_head_init(&dstate->pay_commands);
timers_init(&dstate->timers, controlled_time());
txwatch_hash_init(&dstate->txwatches);
txowatch_hash_init(&dstate->txowatches);
dstate->secpctx = secp256k1_context_create(SECP256K1_CONTEXT_VERIFY
| SECP256K1_CONTEXT_SIGN);
default_config(&dstate->config);
list_head_init(&dstate->bitcoin_req);
list_head_init(&dstate->wallet);
list_head_init(&dstate->payments);
list_head_init(&dstate->addresses);
dstate->dev_never_routefail = false;
dstate->bitcoin_req_running = false;
dstate->nodes = empty_node_map(dstate);
dstate->reexec = NULL;
return dstate;
}
/* Tal wrappers for opt. */
static void *opt_allocfn(size_t size)
{
return tal_alloc_(NULL, size, false, TAL_LABEL("opt_allocfn", ""));
}
static void *tal_reallocfn(void *ptr, size_t size)
{
if (!ptr)
return opt_allocfn(size);
tal_resize_(&ptr, 1, size, false);
return ptr;
}
static void tal_freefn(void *ptr)
{
tal_free(ptr);
}
int main(int argc, char *argv[])
{
struct lightningd_state *dstate = lightningd_state();
unsigned int portnum = 0;
err_set_progname(argv[0]);
opt_set_alloc(opt_allocfn, tal_reallocfn, tal_freefn);
if (!streq(protobuf_c_version(), PROTOBUF_C_VERSION))
errx(1, "Compiled against protobuf %s, but have %s",
PROTOBUF_C_VERSION, protobuf_c_version());
opt_register_noarg("--help|-h", opt_usage_and_exit,
"\n"
"A bitcoin lightning daemon.",
"Print this message.");
opt_register_arg("--port", opt_set_uintval, NULL, &portnum,
"Port to bind to (otherwise, dynamic port is used)");
opt_register_arg("--bitcoin-datadir", opt_set_charp, NULL,
&bitcoin_datadir,
"-datadir arg for bitcoin-cli");
opt_register_logging(dstate->base_log);
opt_register_version();
configdir_register_opts(dstate,
&dstate->config_dir, &dstate->rpc_filename);
config_register_opts(dstate);
dev_register_opts(dstate);
/* Get any configdir 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));
}
/* Activate crash log now we're in the right place. */
crashlog_activate(dstate->base_log);
/* 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);
check_bitcoind_config(dstate);
/* Set up node ID and private key. */
secrets_init(dstate);
new_node(dstate, &dstate->id);
/* Read or create database. */
db_init(dstate);
/* Initialize block topology. */
setup_topology(dstate);
/* Create RPC socket (if any) */
setup_jsonrpc(dstate, dstate->rpc_filename);
/* Set up connections from peers. */
setup_listeners(dstate, portnum);
/* Make sure we use the artificially-controlled time for timers */
io_time_override(controlled_time);
log_info(dstate->base_log, "Hello world!");
/* If we loaded peers from database, reconnect now. */
reconnect_peers(dstate);
for (;;) {
struct timer *expired;
void *v = io_loop(&dstate->timers, &expired);
/* We use io_break(dstate) to shut down. */
if (v == dstate)
break;
if (expired)
timer_expired(dstate, expired);
else
cleanup_peers(dstate);
}
if (dstate->reexec) {
int fd;
char *mocktimearg;
log_unusual(dstate->base_log, "Restart at user request");
fflush(stdout);
fflush(stderr);
/* Manually close all fds (or near enough!) */
for (fd = 3; fd < 1024; fd++)
close(fd);
/* Maybe append mocktime arg. */
mocktimearg = controlled_time_arg(dstate->reexec);
if (mocktimearg) {
size_t n = tal_count(dstate->reexec);
tal_resizez(&dstate->reexec, n+1);
dstate->reexec[n-1] = mocktimearg;
}
if (dstate->dev_never_routefail) {
size_t n = tal_count(dstate->reexec);
tal_resizez(&dstate->reexec, n+1);
dstate->reexec[n-1] = "--dev-no-routefail";
}
execvp(dstate->reexec[0], dstate->reexec);
fatal("Exec '%s' failed: %s",
dstate->reexec[0], strerror(errno));
}
tal_free(dstate);
opt_free_table();
return 0;
}
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