mirror of
https://github.com/ElementsProject/lightning.git
synced 2024-11-19 18:11:28 +01:00
8375857116
Also, we split the more sophisticated json_add helpers to avoid pulling in everything into lightning-cli, and unify the routines to print struct short_channel_id (it's ':', not '/' too). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
464 lines
12 KiB
C
464 lines
12 KiB
C
/* Code for talking to bitcoind. We use bitcoin-cli. */
|
|
#include "bitcoin/base58.h"
|
|
#include "bitcoin/block.h"
|
|
#include "bitcoin/shadouble.h"
|
|
#include "bitcoin/tx.h"
|
|
#include "bitcoind.h"
|
|
#include "lightningd.h"
|
|
#include "log.h"
|
|
#include <ccan/cast/cast.h>
|
|
#include <ccan/io/io.h>
|
|
#include <ccan/pipecmd/pipecmd.h>
|
|
#include <ccan/str/hex/hex.h>
|
|
#include <ccan/take/take.h>
|
|
#include <ccan/tal/grab_file/grab_file.h>
|
|
#include <ccan/tal/path/path.h>
|
|
#include <ccan/tal/str/str.h>
|
|
#include <ccan/tal/tal.h>
|
|
#include <common/json.h>
|
|
#include <common/utils.h>
|
|
#include <errno.h>
|
|
#include <inttypes.h>
|
|
|
|
#define BITCOIN_CLI "bitcoin-cli"
|
|
|
|
char *bitcoin_datadir;
|
|
|
|
static char **gather_args(struct bitcoind *bitcoind,
|
|
const tal_t *ctx, const char *cmd, va_list ap)
|
|
{
|
|
size_t n = 0;
|
|
char **args = tal_arr(ctx, char *, 2);
|
|
|
|
args[n++] = cast_const(char *, bitcoind->chainparams->cli);
|
|
if (bitcoind->chainparams->cli_args) {
|
|
args[n++] = cast_const(char *, bitcoind->chainparams->cli_args);
|
|
tal_resize(&args, n + 1);
|
|
}
|
|
|
|
if (bitcoind->datadir) {
|
|
args[n++] = tal_fmt(args, "-datadir=%s", bitcoind->datadir);
|
|
tal_resize(&args, n + 1);
|
|
}
|
|
args[n++] = cast_const(char *, cmd);
|
|
tal_resize(&args, n + 1);
|
|
|
|
while ((args[n] = va_arg(ap, char *)) != NULL) {
|
|
args[n] = tal_strdup(args, args[n]);
|
|
n++;
|
|
tal_resize(&args, n + 1);
|
|
}
|
|
return args;
|
|
}
|
|
|
|
struct bitcoin_cli {
|
|
struct list_node list;
|
|
struct bitcoind *bitcoind;
|
|
int fd;
|
|
int *exitstatus;
|
|
pid_t pid;
|
|
char **args;
|
|
char *output;
|
|
size_t output_bytes;
|
|
size_t new_output;
|
|
void (*process)(struct bitcoin_cli *);
|
|
void *cb;
|
|
void *cb_arg;
|
|
struct bitcoin_cli **stopper;
|
|
};
|
|
|
|
static struct io_plan *read_more(struct io_conn *conn, struct bitcoin_cli *bcli)
|
|
{
|
|
bcli->output_bytes += bcli->new_output;
|
|
if (bcli->output_bytes == tal_count(bcli->output))
|
|
tal_resize(&bcli->output, bcli->output_bytes * 2);
|
|
return io_read_partial(conn, bcli->output + bcli->output_bytes,
|
|
tal_count(bcli->output) - bcli->output_bytes,
|
|
&bcli->new_output, read_more, bcli);
|
|
}
|
|
|
|
static struct io_plan *output_init(struct io_conn *conn, struct bitcoin_cli *bcli)
|
|
{
|
|
bcli->output_bytes = bcli->new_output = 0;
|
|
bcli->output = tal_arr(bcli, char, 100);
|
|
return read_more(conn, bcli);
|
|
}
|
|
|
|
static void next_bcli(struct bitcoind *bitcoind);
|
|
|
|
/* For printing: simple string of args. */
|
|
static char *bcli_args(struct bitcoin_cli *bcli)
|
|
{
|
|
size_t i;
|
|
char *ret = tal_strdup(bcli, bcli->args[0]);
|
|
|
|
for (i = 1; bcli->args[i]; i++) {
|
|
ret = tal_strcat(bcli, take(ret), " ");
|
|
ret = tal_strcat(bcli, take(ret), bcli->args[i]);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void bcli_finished(struct io_conn *conn, struct bitcoin_cli *bcli)
|
|
{
|
|
int ret, status;
|
|
struct bitcoind *bitcoind = bcli->bitcoind;
|
|
|
|
/* FIXME: If we waited for SIGCHILD, this could never hang! */
|
|
ret = waitpid(bcli->pid, &status, 0);
|
|
if (ret != bcli->pid)
|
|
fatal("%s %s", bcli_args(bcli),
|
|
ret == 0 ? "not exited?" : strerror(errno));
|
|
|
|
if (!WIFEXITED(status))
|
|
fatal("%s died with signal %i",
|
|
bcli_args(bcli),
|
|
WTERMSIG(status));
|
|
|
|
if (!bcli->exitstatus) {
|
|
if (WEXITSTATUS(status) != 0) {
|
|
fatal("%s exited %u: '%.*s'", bcli_args(bcli),
|
|
WEXITSTATUS(status),
|
|
(int)bcli->output_bytes,
|
|
bcli->output);
|
|
}
|
|
} else
|
|
*bcli->exitstatus = WEXITSTATUS(status);
|
|
|
|
bitcoind->req_running = false;
|
|
bcli->process(bcli);
|
|
|
|
next_bcli(bitcoind);
|
|
}
|
|
|
|
static void next_bcli(struct bitcoind *bitcoind)
|
|
{
|
|
struct bitcoin_cli *bcli;
|
|
struct io_conn *conn;
|
|
|
|
if (bitcoind->req_running)
|
|
return;
|
|
|
|
bcli = list_pop(&bitcoind->pending, struct bitcoin_cli, list);
|
|
if (!bcli)
|
|
return;
|
|
|
|
bcli->pid = pipecmdarr(&bcli->fd, NULL, &bcli->fd, bcli->args);
|
|
if (bcli->pid < 0)
|
|
fatal("%s exec failed: %s", bcli->args[0], strerror(errno));
|
|
|
|
bitcoind->req_running = true;
|
|
conn = io_new_conn(bitcoind, bcli->fd, output_init, bcli);
|
|
tal_steal(conn, bcli);
|
|
io_set_finish(conn, bcli_finished, bcli);
|
|
}
|
|
|
|
static void process_donothing(struct bitcoin_cli *bcli)
|
|
{
|
|
}
|
|
|
|
/* If stopper gets freed first, set process() to a noop. */
|
|
static void stop_process_bcli(struct bitcoin_cli **stopper)
|
|
{
|
|
(*stopper)->process = process_donothing;
|
|
(*stopper)->stopper = NULL;
|
|
}
|
|
|
|
/* It command finishes first, free stopper. */
|
|
static void remove_stopper(struct bitcoin_cli *bcli)
|
|
{
|
|
/* Calls stop_process_bcli, but we don't care. */
|
|
tal_free(bcli->stopper);
|
|
}
|
|
|
|
/* If ctx is non-NULL, and is freed before we return, we don't call process() */
|
|
static void
|
|
start_bitcoin_cli(struct bitcoind *bitcoind,
|
|
const tal_t *ctx,
|
|
void (*process)(struct bitcoin_cli *),
|
|
bool nonzero_exit_ok,
|
|
void *cb, void *cb_arg,
|
|
char *cmd, ...)
|
|
{
|
|
va_list ap;
|
|
struct bitcoin_cli *bcli = tal(bitcoind, struct bitcoin_cli);
|
|
|
|
bcli->bitcoind = bitcoind;
|
|
bcli->process = process;
|
|
bcli->cb = cb;
|
|
bcli->cb_arg = cb_arg;
|
|
if (ctx) {
|
|
/* Create child whose destructor will stop us calling */
|
|
bcli->stopper = tal(ctx, struct bitcoin_cli *);
|
|
*bcli->stopper = bcli;
|
|
tal_add_destructor(bcli->stopper, stop_process_bcli);
|
|
tal_add_destructor(bcli, remove_stopper);
|
|
} else
|
|
bcli->stopper = NULL;
|
|
|
|
if (nonzero_exit_ok)
|
|
bcli->exitstatus = tal(bcli, int);
|
|
else
|
|
bcli->exitstatus = NULL;
|
|
va_start(ap, cmd);
|
|
bcli->args = gather_args(bitcoind, bcli, cmd, ap);
|
|
va_end(ap);
|
|
|
|
list_add_tail(&bitcoind->pending, &bcli->list);
|
|
next_bcli(bitcoind);
|
|
}
|
|
|
|
static void process_estimatefee_6(struct bitcoin_cli *bcli)
|
|
{
|
|
double fee;
|
|
char *p, *end;
|
|
u64 fee_rate;
|
|
void (*cb)(struct bitcoind *, u64, void *) = bcli->cb;
|
|
|
|
p = tal_strndup(bcli, bcli->output, bcli->output_bytes);
|
|
fee = strtod(p, &end);
|
|
if (end == p || *end != '\n')
|
|
fatal("%s: gave non-numeric fee %s",
|
|
bcli_args(bcli), p);
|
|
|
|
if (fee < 0) {
|
|
log_unusual(bcli->bitcoind->log,
|
|
"Unable to estimate fee");
|
|
fee_rate = 0;
|
|
} else {
|
|
/* Since we used 6 as an estimate, double it. */
|
|
fee *= 2;
|
|
fee_rate = fee * 100000000;
|
|
}
|
|
|
|
cb(bcli->bitcoind, fee_rate, bcli->cb_arg);
|
|
}
|
|
|
|
static void process_estimatefee_2(struct bitcoin_cli *bcli)
|
|
{
|
|
double fee;
|
|
char *p, *end;
|
|
u64 fee_rate;
|
|
void (*cb)(struct bitcoind *, u64, void *) = bcli->cb;
|
|
|
|
p = tal_strndup(bcli, bcli->output, bcli->output_bytes);
|
|
fee = strtod(p, &end);
|
|
if (end == p || *end != '\n')
|
|
fatal("%s: gave non-numeric fee %s",
|
|
bcli_args(bcli), p);
|
|
|
|
/* Don't know at 2? Try 6... */
|
|
if (fee < 0) {
|
|
start_bitcoin_cli(bcli->bitcoind, NULL, process_estimatefee_6,
|
|
false, bcli->cb, bcli->cb_arg,
|
|
"estimatefee", "6", NULL);
|
|
return;
|
|
}
|
|
fee_rate = fee * 100000000;
|
|
cb(bcli->bitcoind, fee_rate, bcli->cb_arg);
|
|
}
|
|
|
|
void bitcoind_estimate_fee_(struct bitcoind *bitcoind,
|
|
void (*cb)(struct bitcoind *bitcoind,
|
|
u64, void *),
|
|
void *arg)
|
|
{
|
|
start_bitcoin_cli(bitcoind, NULL, process_estimatefee_2, false, cb, arg,
|
|
"estimatefee", "2", NULL);
|
|
}
|
|
|
|
static void process_sendrawtx(struct bitcoin_cli *bcli)
|
|
{
|
|
void (*cb)(struct bitcoind *bitcoind,
|
|
int, const char *msg, void *) = bcli->cb;
|
|
const char *msg = tal_strndup(bcli, (char *)bcli->output,
|
|
bcli->output_bytes);
|
|
|
|
log_debug(bcli->bitcoind->log, "sendrawtx exit %u, gave %s",
|
|
*bcli->exitstatus, msg);
|
|
|
|
cb(bcli->bitcoind, *bcli->exitstatus, msg, bcli->cb_arg);
|
|
}
|
|
|
|
void bitcoind_sendrawtx_(struct bitcoind *bitcoind,
|
|
const char *hextx,
|
|
void (*cb)(struct bitcoind *bitcoind,
|
|
int exitstatus, const char *msg, void *),
|
|
void *arg)
|
|
{
|
|
log_debug(bitcoind->log, "sendrawtransaction: %s", hextx);
|
|
start_bitcoin_cli(bitcoind, NULL, process_sendrawtx, true, cb, arg,
|
|
"sendrawtransaction", hextx, NULL);
|
|
}
|
|
|
|
static void process_chaintips(struct bitcoin_cli *bcli)
|
|
{
|
|
const jsmntok_t *tokens, *t, *end;
|
|
bool valid;
|
|
size_t i;
|
|
struct sha256_double tip;
|
|
void (*cb)(struct bitcoind *bitcoind,
|
|
struct sha256_double *tipid,
|
|
void *arg) = bcli->cb;
|
|
|
|
tokens = json_parse_input(bcli->output, bcli->output_bytes, &valid);
|
|
if (!tokens)
|
|
fatal("%s: %s response",
|
|
bcli_args(bcli),
|
|
valid ? "partial" : "invalid");
|
|
|
|
if (tokens[0].type != JSMN_ARRAY)
|
|
fatal("%s: gave non-array (%.*s)?",
|
|
bcli_args(bcli),
|
|
(int)bcli->output_bytes, bcli->output);
|
|
|
|
valid = false;
|
|
end = json_next(tokens);
|
|
for (i = 0, t = tokens + 1; t < end; t = json_next(t), i++) {
|
|
const jsmntok_t *status = json_get_member(bcli->output, t, "status");
|
|
const jsmntok_t *hash = json_get_member(bcli->output, t, "hash");
|
|
|
|
if (!json_tok_streq(bcli->output, status, "active")) {
|
|
log_debug(bcli->bitcoind->log,
|
|
"Ignoring chaintip %.*s status %.*s",
|
|
hash->end - hash->start,
|
|
bcli->output + hash->start,
|
|
status->end - status->start,
|
|
bcli->output + status->start);
|
|
continue;
|
|
}
|
|
if (valid) {
|
|
log_unusual(bcli->bitcoind->log,
|
|
"%s: Two active chaintips? %.*s",
|
|
bcli_args(bcli),
|
|
(int)bcli->output_bytes, bcli->output);
|
|
continue;
|
|
}
|
|
if (!bitcoin_blkid_from_hex(bcli->output + hash->start,
|
|
hash->end - hash->start,
|
|
&tip))
|
|
fatal("%s: gave bad hash for %zu'th tip (%.*s)?",
|
|
bcli_args(bcli), i,
|
|
(int)bcli->output_bytes, bcli->output);
|
|
valid = true;
|
|
}
|
|
if (!valid)
|
|
fatal("%s: gave no active chaintips (%.*s)?",
|
|
bcli_args(bcli), (int)bcli->output_bytes, bcli->output);
|
|
|
|
cb(bcli->bitcoind, &tip, bcli->cb_arg);
|
|
}
|
|
|
|
void bitcoind_get_chaintip_(struct bitcoind *bitcoind,
|
|
void (*cb)(struct bitcoind *bitcoind,
|
|
const struct sha256_double *tipid,
|
|
void *arg),
|
|
void *arg)
|
|
{
|
|
start_bitcoin_cli(bitcoind, NULL, process_chaintips, false, cb, arg,
|
|
"getchaintips", NULL);
|
|
}
|
|
|
|
static void process_rawblock(struct bitcoin_cli *bcli)
|
|
{
|
|
struct bitcoin_block *blk;
|
|
void (*cb)(struct bitcoind *bitcoind,
|
|
struct bitcoin_block *blk,
|
|
void *arg) = bcli->cb;
|
|
|
|
/* FIXME: Just get header if we can't get full block. */
|
|
blk = bitcoin_block_from_hex(bcli, bcli->output, bcli->output_bytes);
|
|
if (!blk)
|
|
fatal("%s: bad block '%.*s'?",
|
|
bcli_args(bcli),
|
|
(int)bcli->output_bytes, (char *)bcli->output);
|
|
|
|
cb(bcli->bitcoind, blk, bcli->cb_arg);
|
|
}
|
|
|
|
void bitcoind_getrawblock_(struct bitcoind *bitcoind,
|
|
const struct sha256_double *blockid,
|
|
void (*cb)(struct bitcoind *bitcoind,
|
|
struct bitcoin_block *blk,
|
|
void *arg),
|
|
void *arg)
|
|
{
|
|
char hex[hex_str_size(sizeof(*blockid))];
|
|
|
|
bitcoin_blkid_to_hex(blockid, hex, sizeof(hex));
|
|
start_bitcoin_cli(bitcoind, NULL, process_rawblock, false, cb, arg,
|
|
"getblock", hex, "false", NULL);
|
|
}
|
|
|
|
static void process_getblockcount(struct bitcoin_cli *bcli)
|
|
{
|
|
u32 blockcount;
|
|
char *p, *end;
|
|
void (*cb)(struct bitcoind *bitcoind,
|
|
u32 blockcount,
|
|
void *arg) = bcli->cb;
|
|
|
|
p = tal_strndup(bcli, bcli->output, bcli->output_bytes);
|
|
blockcount = strtol(p, &end, 10);
|
|
if (end == p || *end != '\n')
|
|
fatal("%s: gave non-numeric blockcount %s",
|
|
bcli_args(bcli), p);
|
|
|
|
cb(bcli->bitcoind, blockcount, bcli->cb_arg);
|
|
}
|
|
|
|
void bitcoind_getblockcount_(struct bitcoind *bitcoind,
|
|
void (*cb)(struct bitcoind *bitcoind,
|
|
u32 blockcount,
|
|
void *arg),
|
|
void *arg)
|
|
{
|
|
start_bitcoin_cli(bitcoind, NULL, process_getblockcount, false, cb, arg,
|
|
"getblockcount", NULL);
|
|
}
|
|
|
|
static void process_getblockhash(struct bitcoin_cli *bcli)
|
|
{
|
|
struct sha256_double blkid;
|
|
void (*cb)(struct bitcoind *bitcoind,
|
|
const struct sha256_double *blkid,
|
|
void *arg) = bcli->cb;
|
|
|
|
if (bcli->output_bytes == 0
|
|
|| !bitcoin_blkid_from_hex(bcli->output, bcli->output_bytes-1,
|
|
&blkid)) {
|
|
fatal("%s: bad blockid '%.*s'",
|
|
bcli_args(bcli), (int)bcli->output_bytes, bcli->output);
|
|
}
|
|
|
|
cb(bcli->bitcoind, &blkid, bcli->cb_arg);
|
|
}
|
|
|
|
void bitcoind_getblockhash_(struct bitcoind *bitcoind,
|
|
u32 height,
|
|
void (*cb)(struct bitcoind *bitcoind,
|
|
const struct sha256_double *blkid,
|
|
void *arg),
|
|
void *arg)
|
|
{
|
|
char str[STR_MAX_CHARS(height)];
|
|
sprintf(str, "%u", height);
|
|
|
|
start_bitcoin_cli(bitcoind, NULL, process_getblockhash, false, cb, arg,
|
|
"getblockhash", str, NULL);
|
|
}
|
|
|
|
struct bitcoind *new_bitcoind(const tal_t *ctx, struct log *log)
|
|
{
|
|
struct bitcoind *bitcoind = tal(ctx, struct bitcoind);
|
|
|
|
/* Use testnet by default, change later if we want another network */
|
|
bitcoind->chainparams = chainparams_for_network("testnet");
|
|
bitcoind->datadir = NULL;
|
|
bitcoind->log = log;
|
|
bitcoind->req_running = false;
|
|
list_head_init(&bitcoind->pending);
|
|
|
|
return bitcoind;
|
|
}
|