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litecoin/src/bitcoin-cli.cpp

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2020 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#if defined(HAVE_CONFIG_H)
#include <config/bitcoin-config.h>
#endif
#include <chainparamsbase.h>
#include <clientversion.h>
#include <optional.h>
#include <rpc/client.h>
#include <rpc/mining.h>
#include <rpc/protocol.h>
#include <rpc/request.h>
#include <tinyformat.h>
#include <util/strencodings.h>
#include <util/system.h>
#include <util/translation.h>
#include <util/url.h>
#include <algorithm>
#include <functional>
#include <memory>
#include <stdio.h>
#include <string>
#include <tuple>
#include <event2/buffer.h>
#include <event2/keyvalq_struct.h>
#include <support/events.h>
#include <univalue.h>
#include <compat/stdin.h>
const std::function<std::string(const char*)> G_TRANSLATION_FUN = nullptr;
UrlDecodeFn* const URL_DECODE = urlDecode;
static const char DEFAULT_RPCCONNECT[] = "127.0.0.1";
static const int DEFAULT_HTTP_CLIENT_TIMEOUT=900;
static const bool DEFAULT_NAMED=false;
static const int CONTINUE_EXECUTION=-1;
/** Default number of blocks to generate for RPC generatetoaddress. */
static const std::string DEFAULT_NBLOCKS = "1";
static void SetupCliArgs(ArgsManager& argsman)
{
SetupHelpOptions(argsman);
const auto defaultBaseParams = CreateBaseChainParams(CBaseChainParams::MAIN);
const auto testnetBaseParams = CreateBaseChainParams(CBaseChainParams::TESTNET);
const auto signetBaseParams = CreateBaseChainParams(CBaseChainParams::SIGNET);
const auto regtestBaseParams = CreateBaseChainParams(CBaseChainParams::REGTEST);
argsman.AddArg("-version", "Print version and exit", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-conf=<file>", strprintf("Specify configuration file. Relative paths will be prefixed by datadir location. (default: %s)", BITCOIN_CONF_FILENAME), ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-datadir=<dir>", "Specify data directory", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-generate", strprintf("Generate blocks immediately, equivalent to RPC generatenewaddress followed by RPC generatetoaddress. Optional positional integer arguments are number of blocks to generate (default: %s) and maximum iterations to try (default: %s), equivalent to RPC generatetoaddress nblocks and maxtries arguments. Example: litecoin-cli -generate 4 1000", DEFAULT_NBLOCKS, DEFAULT_MAX_TRIES), ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-getinfo", "Get general information from the remote server. Note that unlike server-side RPC calls, the results of -getinfo is the result of multiple non-atomic requests. Some entries in the result may represent results from different states (e.g. wallet balance may be as of a different block from the chain state reported)", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-netinfo", "Get network peer connection information from the remote server. An optional integer argument from 0 to 4 can be passed for different peers listings (default: 0).", ArgsManager::ALLOW_INT, OptionsCategory::OPTIONS);
SetupChainParamsBaseOptions(argsman);
argsman.AddArg("-named", strprintf("Pass named instead of positional arguments (default: %s)", DEFAULT_NAMED), ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-rpcclienttimeout=<n>", strprintf("Timeout in seconds during HTTP requests, or 0 for no timeout. (default: %d)", DEFAULT_HTTP_CLIENT_TIMEOUT), ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-rpcconnect=<ip>", strprintf("Send commands to node running on <ip> (default: %s)", DEFAULT_RPCCONNECT), ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-rpccookiefile=<loc>", "Location of the auth cookie. Relative paths will be prefixed by a net-specific datadir location. (default: data dir)", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-rpcpassword=<pw>", "Password for JSON-RPC connections", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-rpcport=<port>", strprintf("Connect to JSON-RPC on <port> (default: %u, testnet: %u, signet: %u, regtest: %u)", defaultBaseParams->RPCPort(), testnetBaseParams->RPCPort(), signetBaseParams->RPCPort(), regtestBaseParams->RPCPort()), ArgsManager::ALLOW_ANY | ArgsManager::NETWORK_ONLY, OptionsCategory::OPTIONS);
argsman.AddArg("-rpcuser=<user>", "Username for JSON-RPC connections", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-rpcwait", "Wait for RPC server to start", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-rpcwallet=<walletname>", "Send RPC for non-default wallet on RPC server (needs to exactly match corresponding -wallet option passed to litecoind). This changes the RPC endpoint used, e.g. http://127.0.0.1:8332/wallet/<walletname>", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-stdin", "Read extra arguments from standard input, one per line until EOF/Ctrl-D (recommended for sensitive information such as passphrases). When combined with -stdinrpcpass, the first line from standard input is used for the RPC password.", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-stdinrpcpass", "Read RPC password from standard input as a single line. When combined with -stdin, the first line from standard input is used for the RPC password. When combined with -stdinwalletpassphrase, -stdinrpcpass consumes the first line, and -stdinwalletpassphrase consumes the second.", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-stdinwalletpassphrase", "Read wallet passphrase from standard input as a single line. When combined with -stdin, the first line from standard input is used for the wallet passphrase.", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
}
/** libevent event log callback */
static void libevent_log_cb(int severity, const char *msg)
{
#ifndef EVENT_LOG_ERR // EVENT_LOG_ERR was added in 2.0.19; but before then _EVENT_LOG_ERR existed.
# define EVENT_LOG_ERR _EVENT_LOG_ERR
#endif
// Ignore everything other than errors
if (severity >= EVENT_LOG_ERR) {
throw std::runtime_error(strprintf("libevent error: %s", msg));
}
}
//
// Exception thrown on connection error. This error is used to determine
// when to wait if -rpcwait is given.
//
class CConnectionFailed : public std::runtime_error
{
public:
explicit inline CConnectionFailed(const std::string& msg) :
std::runtime_error(msg)
{}
};
//
// This function returns either one of EXIT_ codes when it's expected to stop the process or
// CONTINUE_EXECUTION when it's expected to continue further.
//
static int AppInitRPC(int argc, char* argv[])
{
SetupCliArgs(gArgs);
std::string error;
if (!gArgs.ParseParameters(argc, argv, error)) {
tfm::format(std::cerr, "Error parsing command line arguments: %s\n", error);
return EXIT_FAILURE;
}
if (argc < 2 || HelpRequested(gArgs) || gArgs.IsArgSet("-version")) {
std::string strUsage = PACKAGE_NAME " RPC client version " + FormatFullVersion() + "\n";
if (!gArgs.IsArgSet("-version")) {
strUsage += "\n"
"Usage: litecoin-cli [options] <command> [params] Send command to " PACKAGE_NAME "\n"
"or: litecoin-cli [options] -named <command> [name=value]... Send command to " PACKAGE_NAME " (with named arguments)\n"
"or: litecoin-cli [options] help List commands\n"
"or: litecoin-cli [options] help <command> Get help for a command\n";
strUsage += "\n" + gArgs.GetHelpMessage();
}
tfm::format(std::cout, "%s", strUsage);
if (argc < 2) {
tfm::format(std::cerr, "Error: too few parameters\n");
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
if (!CheckDataDirOption()) {
tfm::format(std::cerr, "Error: Specified data directory \"%s\" does not exist.\n", gArgs.GetArg("-datadir", ""));
return EXIT_FAILURE;
}
if (!gArgs.ReadConfigFiles(error, true)) {
tfm::format(std::cerr, "Error reading configuration file: %s\n", error);
return EXIT_FAILURE;
}
// Check for chain settings (BaseParams() calls are only valid after this clause)
try {
SelectBaseParams(gArgs.GetChainName());
} catch (const std::exception& e) {
tfm::format(std::cerr, "Error: %s\n", e.what());
return EXIT_FAILURE;
}
return CONTINUE_EXECUTION;
}
/** Reply structure for request_done to fill in */
struct HTTPReply
{
HTTPReply(): status(0), error(-1) {}
int status;
int error;
std::string body;
};
static std::string http_errorstring(int code)
{
switch(code) {
#if LIBEVENT_VERSION_NUMBER >= 0x02010300
case EVREQ_HTTP_TIMEOUT:
return "timeout reached";
case EVREQ_HTTP_EOF:
return "EOF reached";
case EVREQ_HTTP_INVALID_HEADER:
return "error while reading header, or invalid header";
case EVREQ_HTTP_BUFFER_ERROR:
return "error encountered while reading or writing";
case EVREQ_HTTP_REQUEST_CANCEL:
return "request was canceled";
case EVREQ_HTTP_DATA_TOO_LONG:
return "response body is larger than allowed";
#endif
default:
return "unknown";
}
}
static void http_request_done(struct evhttp_request *req, void *ctx)
{
HTTPReply *reply = static_cast<HTTPReply*>(ctx);
if (req == nullptr) {
/* If req is nullptr, it means an error occurred while connecting: the
* error code will have been passed to http_error_cb.
*/
reply->status = 0;
return;
}
reply->status = evhttp_request_get_response_code(req);
struct evbuffer *buf = evhttp_request_get_input_buffer(req);
if (buf)
{
size_t size = evbuffer_get_length(buf);
const char *data = (const char*)evbuffer_pullup(buf, size);
if (data)
reply->body = std::string(data, size);
evbuffer_drain(buf, size);
}
}
#if LIBEVENT_VERSION_NUMBER >= 0x02010300
static void http_error_cb(enum evhttp_request_error err, void *ctx)
{
HTTPReply *reply = static_cast<HTTPReply*>(ctx);
reply->error = err;
}
#endif
/** Class that handles the conversion from a command-line to a JSON-RPC request,
* as well as converting back to a JSON object that can be shown as result.
*/
class BaseRequestHandler
{
public:
virtual ~BaseRequestHandler() {}
virtual UniValue PrepareRequest(const std::string& method, const std::vector<std::string>& args) = 0;
virtual UniValue ProcessReply(const UniValue &batch_in) = 0;
};
/** Process getinfo requests */
class GetinfoRequestHandler: public BaseRequestHandler
{
public:
const int ID_NETWORKINFO = 0;
const int ID_BLOCKCHAININFO = 1;
const int ID_WALLETINFO = 2;
const int ID_BALANCES = 3;
/** Create a simulated `getinfo` request. */
UniValue PrepareRequest(const std::string& method, const std::vector<std::string>& args) override
{
if (!args.empty()) {
throw std::runtime_error("-getinfo takes no arguments");
}
UniValue result(UniValue::VARR);
result.push_back(JSONRPCRequestObj("getnetworkinfo", NullUniValue, ID_NETWORKINFO));
result.push_back(JSONRPCRequestObj("getblockchaininfo", NullUniValue, ID_BLOCKCHAININFO));
result.push_back(JSONRPCRequestObj("getwalletinfo", NullUniValue, ID_WALLETINFO));
result.push_back(JSONRPCRequestObj("getbalances", NullUniValue, ID_BALANCES));
return result;
}
/** Collect values from the batch and form a simulated `getinfo` reply. */
UniValue ProcessReply(const UniValue &batch_in) override
{
UniValue result(UniValue::VOBJ);
const std::vector<UniValue> batch = JSONRPCProcessBatchReply(batch_in);
// Errors in getnetworkinfo() and getblockchaininfo() are fatal, pass them on;
// getwalletinfo() and getbalances() are allowed to fail if there is no wallet.
if (!batch[ID_NETWORKINFO]["error"].isNull()) {
return batch[ID_NETWORKINFO];
}
if (!batch[ID_BLOCKCHAININFO]["error"].isNull()) {
return batch[ID_BLOCKCHAININFO];
}
result.pushKV("version", batch[ID_NETWORKINFO]["result"]["version"]);
result.pushKV("blocks", batch[ID_BLOCKCHAININFO]["result"]["blocks"]);
result.pushKV("headers", batch[ID_BLOCKCHAININFO]["result"]["headers"]);
result.pushKV("verificationprogress", batch[ID_BLOCKCHAININFO]["result"]["verificationprogress"]);
result.pushKV("timeoffset", batch[ID_NETWORKINFO]["result"]["timeoffset"]);
UniValue connections(UniValue::VOBJ);
connections.pushKV("in", batch[ID_NETWORKINFO]["result"]["connections_in"]);
connections.pushKV("out", batch[ID_NETWORKINFO]["result"]["connections_out"]);
connections.pushKV("total", batch[ID_NETWORKINFO]["result"]["connections"]);
result.pushKV("connections", connections);
result.pushKV("proxy", batch[ID_NETWORKINFO]["result"]["networks"][0]["proxy"]);
result.pushKV("difficulty", batch[ID_BLOCKCHAININFO]["result"]["difficulty"]);
result.pushKV("chain", UniValue(batch[ID_BLOCKCHAININFO]["result"]["chain"]));
if (!batch[ID_WALLETINFO]["result"].isNull()) {
result.pushKV("keypoolsize", batch[ID_WALLETINFO]["result"]["keypoolsize"]);
if (!batch[ID_WALLETINFO]["result"]["unlocked_until"].isNull()) {
result.pushKV("unlocked_until", batch[ID_WALLETINFO]["result"]["unlocked_until"]);
}
result.pushKV("paytxfee", batch[ID_WALLETINFO]["result"]["paytxfee"]);
}
if (!batch[ID_BALANCES]["result"].isNull()) {
result.pushKV("balance", batch[ID_BALANCES]["result"]["mine"]["trusted"]);
}
result.pushKV("relayfee", batch[ID_NETWORKINFO]["result"]["relayfee"]);
result.pushKV("warnings", batch[ID_NETWORKINFO]["result"]["warnings"]);
return JSONRPCReplyObj(result, NullUniValue, 1);
}
};
/** Process netinfo requests */
class NetinfoRequestHandler : public BaseRequestHandler
{
private:
static constexpr int8_t UNKNOWN_NETWORK{-1};
static constexpr uint8_t m_networks_size{3};
const std::array<std::string, m_networks_size> m_networks{{"ipv4", "ipv6", "onion"}};
std::array<std::array<uint16_t, m_networks_size + 2>, 3> m_counts{{{}}}; //!< Peer counts by (in/out/total, networks/total/block-relay)
int8_t NetworkStringToId(const std::string& str) const
{
for (uint8_t i = 0; i < m_networks_size; ++i) {
if (str == m_networks.at(i)) return i;
}
return UNKNOWN_NETWORK;
}
uint8_t m_details_level{0}; //!< Optional user-supplied arg to set dashboard details level
bool DetailsRequested() const { return m_details_level > 0 && m_details_level < 5; }
bool IsAddressSelected() const { return m_details_level == 2 || m_details_level == 4; }
bool IsVersionSelected() const { return m_details_level == 3 || m_details_level == 4; }
bool m_is_asmap_on{false};
size_t m_max_addr_length{0};
size_t m_max_age_length{4};
size_t m_max_id_length{2};
struct Peer {
std::string addr;
std::string sub_version;
std::string network;
std::string age;
double min_ping;
double ping;
int64_t last_blck;
int64_t last_recv;
int64_t last_send;
int64_t last_trxn;
int id;
int mapped_as;
int version;
bool is_block_relay;
bool is_outbound;
bool operator<(const Peer& rhs) const { return std::tie(is_outbound, min_ping) < std::tie(rhs.is_outbound, rhs.min_ping); }
};
std::vector<Peer> m_peers;
std::string ChainToString() const
{
if (gArgs.GetChainName() == CBaseChainParams::TESTNET) return " testnet";
if (gArgs.GetChainName() == CBaseChainParams::SIGNET) return " signet";
if (gArgs.GetChainName() == CBaseChainParams::REGTEST) return " regtest";
return "";
}
std::string PingTimeToString(double seconds) const
{
if (seconds < 0) return "";
const double milliseconds{round(1000 * seconds)};
return milliseconds > 999999 ? "-" : ToString(milliseconds);
}
const int64_t m_time_now{GetSystemTimeInSeconds()};
public:
static constexpr int ID_PEERINFO = 0;
static constexpr int ID_NETWORKINFO = 1;
UniValue PrepareRequest(const std::string& method, const std::vector<std::string>& args) override
{
if (!args.empty()) {
uint8_t n{0};
if (ParseUInt8(args.at(0), &n)) {
m_details_level = n;
}
}
UniValue result(UniValue::VARR);
result.push_back(JSONRPCRequestObj("getpeerinfo", NullUniValue, ID_PEERINFO));
result.push_back(JSONRPCRequestObj("getnetworkinfo", NullUniValue, ID_NETWORKINFO));
return result;
}
UniValue ProcessReply(const UniValue& batch_in) override
{
const std::vector<UniValue> batch{JSONRPCProcessBatchReply(batch_in)};
if (!batch[ID_PEERINFO]["error"].isNull()) return batch[ID_PEERINFO];
if (!batch[ID_NETWORKINFO]["error"].isNull()) return batch[ID_NETWORKINFO];
const UniValue& networkinfo{batch[ID_NETWORKINFO]["result"]};
if (networkinfo["version"].get_int() < 209900) {
throw std::runtime_error("-netinfo requires litecoind server to be running v0.21.0 and up");
}
// Count peer connection totals, and if DetailsRequested(), store peer data in a vector of structs.
for (const UniValue& peer : batch[ID_PEERINFO]["result"].getValues()) {
const std::string network{peer["network"].get_str()};
const int8_t network_id{NetworkStringToId(network)};
if (network_id == UNKNOWN_NETWORK) continue;
const bool is_outbound{!peer["inbound"].get_bool()};
const bool is_block_relay{!peer["relaytxes"].get_bool()};
++m_counts.at(is_outbound).at(network_id); // in/out by network
++m_counts.at(is_outbound).at(m_networks_size); // in/out overall
++m_counts.at(2).at(network_id); // total by network
++m_counts.at(2).at(m_networks_size); // total overall
if (is_block_relay) {
++m_counts.at(is_outbound).at(m_networks_size + 1); // in/out block-relay
++m_counts.at(2).at(m_networks_size + 1); // total block-relay
}
if (DetailsRequested()) {
// Push data for this peer to the peers vector.
const int peer_id{peer["id"].get_int()};
const int mapped_as{peer["mapped_as"].isNull() ? 0 : peer["mapped_as"].get_int()};
const int version{peer["version"].get_int()};
const int64_t conn_time{peer["conntime"].get_int64()};
const int64_t last_blck{peer["last_block"].get_int64()};
const int64_t last_recv{peer["lastrecv"].get_int64()};
const int64_t last_send{peer["lastsend"].get_int64()};
const int64_t last_trxn{peer["last_transaction"].get_int64()};
const double min_ping{peer["minping"].isNull() ? -1 : peer["minping"].get_real()};
const double ping{peer["pingtime"].isNull() ? -1 : peer["pingtime"].get_real()};
const std::string addr{peer["addr"].get_str()};
const std::string age{conn_time == 0 ? "" : ToString((m_time_now - conn_time) / 60)};
const std::string sub_version{peer["subver"].get_str()};
m_peers.push_back({addr, sub_version, network, age, min_ping, ping, last_blck, last_recv, last_send, last_trxn, peer_id, mapped_as, version, is_block_relay, is_outbound});
m_max_addr_length = std::max(addr.length() + 1, m_max_addr_length);
m_max_age_length = std::max(age.length(), m_max_age_length);
m_max_id_length = std::max(ToString(peer_id).length(), m_max_id_length);
m_is_asmap_on |= (mapped_as != 0);
}
}
// Generate report header.
std::string result{strprintf("%s %s%s - %i%s\n\n", PACKAGE_NAME, FormatFullVersion(), ChainToString(), networkinfo["protocolversion"].get_int(), networkinfo["subversion"].get_str())};
// Report detailed peer connections list sorted by direction and minimum ping time.
if (DetailsRequested() && !m_peers.empty()) {
std::sort(m_peers.begin(), m_peers.end());
result += strprintf("Peer connections sorted by direction and min ping\n<-> relay net mping ping send recv txn blk %*s ", m_max_age_length, "age");
if (m_is_asmap_on) result += " asmap ";
result += strprintf("%*s %-*s%s\n", m_max_id_length, "id", IsAddressSelected() ? m_max_addr_length : 0, IsAddressSelected() ? "address" : "", IsVersionSelected() ? "version" : "");
for (const Peer& peer : m_peers) {
std::string version{ToString(peer.version) + peer.sub_version};
result += strprintf(
"%3s %5s %5s%7s%7s%5s%5s%5s%5s %*s%*i %*s %-*s%s\n",
peer.is_outbound ? "out" : "in",
peer.is_block_relay ? "block" : "full",
peer.network,
PingTimeToString(peer.min_ping),
PingTimeToString(peer.ping),
peer.last_send == 0 ? "" : ToString(m_time_now - peer.last_send),
peer.last_recv == 0 ? "" : ToString(m_time_now - peer.last_recv),
peer.last_trxn == 0 ? "" : ToString((m_time_now - peer.last_trxn) / 60),
peer.last_blck == 0 ? "" : ToString((m_time_now - peer.last_blck) / 60),
m_max_age_length, // variable spacing
peer.age,
m_is_asmap_on ? 7 : 0, // variable spacing
m_is_asmap_on && peer.mapped_as != 0 ? ToString(peer.mapped_as) : "",
m_max_id_length, // variable spacing
peer.id,
IsAddressSelected() ? m_max_addr_length : 0, // variable spacing
IsAddressSelected() ? peer.addr : "",
IsVersionSelected() && version != "0" ? version : "");
}
result += strprintf(" ms ms sec sec min min %*s\n\n", m_max_age_length, "min");
}
// Report peer connection totals by type.
result += " ipv4 ipv6 onion total block-relay\n";
const std::array<std::string, 3> rows{{"in", "out", "total"}};
for (uint8_t i = 0; i < m_networks_size; ++i) {
result += strprintf("%-5s %5i %5i %5i %5i %5i\n", rows.at(i), m_counts.at(i).at(0), m_counts.at(i).at(1), m_counts.at(i).at(2), m_counts.at(i).at(m_networks_size), m_counts.at(i).at(m_networks_size + 1));
}
// Report local addresses, ports, and scores.
result += "\nLocal addresses";
const std::vector<UniValue>& local_addrs{networkinfo["localaddresses"].getValues()};
if (local_addrs.empty()) {
result += ": n/a\n";
} else {
size_t max_addr_size{0};
for (const UniValue& addr : local_addrs) {
max_addr_size = std::max(addr["address"].get_str().length() + 1, max_addr_size);
}
for (const UniValue& addr : local_addrs) {
result += strprintf("\n%-*s port %6i score %6i", max_addr_size, addr["address"].get_str(), addr["port"].get_int(), addr["score"].get_int());
}
}
return JSONRPCReplyObj(UniValue{result}, NullUniValue, 1);
}
};
/** Process RPC generatetoaddress request. */
class GenerateToAddressRequestHandler : public BaseRequestHandler
{
public:
UniValue PrepareRequest(const std::string& method, const std::vector<std::string>& args) override
{
address_str = args.at(1);
UniValue params{RPCConvertValues("generatetoaddress", args)};
return JSONRPCRequestObj("generatetoaddress", params, 1);
}
UniValue ProcessReply(const UniValue &reply) override
{
UniValue result(UniValue::VOBJ);
result.pushKV("address", address_str);
result.pushKV("blocks", reply.get_obj()["result"]);
return JSONRPCReplyObj(result, NullUniValue, 1);
}
protected:
std::string address_str;
};
/** Process default single requests */
class DefaultRequestHandler: public BaseRequestHandler {
public:
UniValue PrepareRequest(const std::string& method, const std::vector<std::string>& args) override
{
UniValue params;
if(gArgs.GetBoolArg("-named", DEFAULT_NAMED)) {
params = RPCConvertNamedValues(method, args);
} else {
params = RPCConvertValues(method, args);
}
return JSONRPCRequestObj(method, params, 1);
}
UniValue ProcessReply(const UniValue &reply) override
{
return reply.get_obj();
}
};
static UniValue CallRPC(BaseRequestHandler* rh, const std::string& strMethod, const std::vector<std::string>& args, const Optional<std::string>& rpcwallet = {})
{
std::string host;
// In preference order, we choose the following for the port:
// 1. -rpcport
// 2. port in -rpcconnect (ie following : in ipv4 or ]: in ipv6)
// 3. default port for chain
int port = BaseParams().RPCPort();
SplitHostPort(gArgs.GetArg("-rpcconnect", DEFAULT_RPCCONNECT), port, host);
port = gArgs.GetArg("-rpcport", port);
// Obtain event base
raii_event_base base = obtain_event_base();
// Synchronously look up hostname
raii_evhttp_connection evcon = obtain_evhttp_connection_base(base.get(), host, port);
// Set connection timeout
{
const int timeout = gArgs.GetArg("-rpcclienttimeout", DEFAULT_HTTP_CLIENT_TIMEOUT);
if (timeout > 0) {
evhttp_connection_set_timeout(evcon.get(), timeout);
} else {
// Indefinite request timeouts are not possible in libevent-http, so we
// set the timeout to a very long time period instead.
constexpr int YEAR_IN_SECONDS = 31556952; // Average length of year in Gregorian calendar
evhttp_connection_set_timeout(evcon.get(), 5 * YEAR_IN_SECONDS);
}
}
HTTPReply response;
raii_evhttp_request req = obtain_evhttp_request(http_request_done, (void*)&response);
if (req == nullptr)
throw std::runtime_error("create http request failed");
#if LIBEVENT_VERSION_NUMBER >= 0x02010300
evhttp_request_set_error_cb(req.get(), http_error_cb);
#endif
// Get credentials
std::string strRPCUserColonPass;
bool failedToGetAuthCookie = false;
if (gArgs.GetArg("-rpcpassword", "") == "") {
// Try fall back to cookie-based authentication if no password is provided
if (!GetAuthCookie(&strRPCUserColonPass)) {
failedToGetAuthCookie = true;
}
} else {
strRPCUserColonPass = gArgs.GetArg("-rpcuser", "") + ":" + gArgs.GetArg("-rpcpassword", "");
}
struct evkeyvalq* output_headers = evhttp_request_get_output_headers(req.get());
assert(output_headers);
evhttp_add_header(output_headers, "Host", host.c_str());
evhttp_add_header(output_headers, "Connection", "close");
evhttp_add_header(output_headers, "Content-Type", "application/json");
evhttp_add_header(output_headers, "Authorization", (std::string("Basic ") + EncodeBase64(strRPCUserColonPass)).c_str());
// Attach request data
std::string strRequest = rh->PrepareRequest(strMethod, args).write() + "\n";
struct evbuffer* output_buffer = evhttp_request_get_output_buffer(req.get());
assert(output_buffer);
evbuffer_add(output_buffer, strRequest.data(), strRequest.size());
// check if we should use a special wallet endpoint
std::string endpoint = "/";
if (rpcwallet) {
char* encodedURI = evhttp_uriencode(rpcwallet->data(), rpcwallet->size(), false);
if (encodedURI) {
endpoint = "/wallet/" + std::string(encodedURI);
free(encodedURI);
} else {
throw CConnectionFailed("uri-encode failed");
}
}
int r = evhttp_make_request(evcon.get(), req.get(), EVHTTP_REQ_POST, endpoint.c_str());
req.release(); // ownership moved to evcon in above call
if (r != 0) {
throw CConnectionFailed("send http request failed");
}
event_base_dispatch(base.get());
if (response.status == 0) {
std::string responseErrorMessage;
if (response.error != -1) {
responseErrorMessage = strprintf(" (error code %d - \"%s\")", response.error, http_errorstring(response.error));
}
throw CConnectionFailed(strprintf("Could not connect to the server %s:%d%s\n\nMake sure the litecoind server is running and that you are connecting to the correct RPC port.", host, port, responseErrorMessage));
} else if (response.status == HTTP_UNAUTHORIZED) {
if (failedToGetAuthCookie) {
throw std::runtime_error(strprintf(
"Could not locate RPC credentials. No authentication cookie could be found, and RPC password is not set. See -rpcpassword and -stdinrpcpass. Configuration file: (%s)",
GetConfigFile(gArgs.GetArg("-conf", BITCOIN_CONF_FILENAME)).string()));
} else {
throw std::runtime_error("Authorization failed: Incorrect rpcuser or rpcpassword");
}
} else if (response.status >= 400 && response.status != HTTP_BAD_REQUEST && response.status != HTTP_NOT_FOUND && response.status != HTTP_INTERNAL_SERVER_ERROR)
throw std::runtime_error(strprintf("server returned HTTP error %d", response.status));
else if (response.body.empty())
throw std::runtime_error("no response from server");
// Parse reply
UniValue valReply(UniValue::VSTR);
if (!valReply.read(response.body))
throw std::runtime_error("couldn't parse reply from server");
const UniValue reply = rh->ProcessReply(valReply);
if (reply.empty())
throw std::runtime_error("expected reply to have result, error and id properties");
return reply;
}
/**
* ConnectAndCallRPC wraps CallRPC with -rpcwait and an exception handler.
*
* @param[in] rh Pointer to RequestHandler.
* @param[in] strMethod Reference to const string method to forward to CallRPC.
* @param[in] rpcwallet Reference to const optional string wallet name to forward to CallRPC.
* @returns the RPC response as a UniValue object.
* @throws a CConnectionFailed std::runtime_error if connection failed or RPC server still in warmup.
*/
static UniValue ConnectAndCallRPC(BaseRequestHandler* rh, const std::string& strMethod, const std::vector<std::string>& args, const Optional<std::string>& rpcwallet = {})
{
UniValue response(UniValue::VOBJ);
// Execute and handle connection failures with -rpcwait.
const bool fWait = gArgs.GetBoolArg("-rpcwait", false);
do {
try {
response = CallRPC(rh, strMethod, args, rpcwallet);
if (fWait) {
const UniValue& error = find_value(response, "error");
if (!error.isNull() && error["code"].get_int() == RPC_IN_WARMUP) {
throw CConnectionFailed("server in warmup");
}
}
break; // Connection succeeded, no need to retry.
} catch (const CConnectionFailed&) {
if (fWait) {
UninterruptibleSleep(std::chrono::milliseconds{1000});
} else {
throw;
}
}
} while (fWait);
return response;
}
/** Parse UniValue result to update the message to print to std::cout. */
static void ParseResult(const UniValue& result, std::string& strPrint)
{
if (result.isNull()) return;
strPrint = result.isStr() ? result.get_str() : result.write(2);
}
/** Parse UniValue error to update the message to print to std::cerr and the code to return. */
static void ParseError(const UniValue& error, std::string& strPrint, int& nRet)
{
if (error.isObject()) {
const UniValue& err_code = find_value(error, "code");
const UniValue& err_msg = find_value(error, "message");
if (!err_code.isNull()) {
strPrint = "error code: " + err_code.getValStr() + "\n";
}
if (err_msg.isStr()) {
strPrint += ("error message:\n" + err_msg.get_str());
}
if (err_code.isNum() && err_code.get_int() == RPC_WALLET_NOT_SPECIFIED) {
strPrint += "\nTry adding \"-rpcwallet=<filename>\" option to litecoin-cli command line.";
}
} else {
strPrint = "error: " + error.write();
}
nRet = abs(error["code"].get_int());
}
/**
* GetWalletBalances calls listwallets; if more than one wallet is loaded, it then
* fetches mine.trusted balances for each loaded wallet and pushes them to `result`.
*
* @param result Reference to UniValue object the wallet names and balances are pushed to.
*/
static void GetWalletBalances(UniValue& result)
{
DefaultRequestHandler rh;
const UniValue listwallets = ConnectAndCallRPC(&rh, "listwallets", /* args=*/{});
if (!find_value(listwallets, "error").isNull()) return;
const UniValue& wallets = find_value(listwallets, "result");
if (wallets.size() <= 1) return;
UniValue balances(UniValue::VOBJ);
for (const UniValue& wallet : wallets.getValues()) {
const std::string wallet_name = wallet.get_str();
const UniValue getbalances = ConnectAndCallRPC(&rh, "getbalances", /* args=*/{}, wallet_name);
const UniValue& balance = find_value(getbalances, "result")["mine"]["trusted"];
balances.pushKV(wallet_name, balance);
}
result.pushKV("balances", balances);
}
/**
* Call RPC getnewaddress.
* @returns getnewaddress response as a UniValue object.
*/
static UniValue GetNewAddress()
{
Optional<std::string> wallet_name{};
if (gArgs.IsArgSet("-rpcwallet")) wallet_name = gArgs.GetArg("-rpcwallet", "");
DefaultRequestHandler rh;
return ConnectAndCallRPC(&rh, "getnewaddress", /* args=*/{}, wallet_name);
}
/**
* Check bounds and set up args for RPC generatetoaddress params: nblocks, address, maxtries.
* @param[in] address Reference to const string address to insert into the args.
* @param args Reference to vector of string args to modify.
*/
static void SetGenerateToAddressArgs(const std::string& address, std::vector<std::string>& args)
{
if (args.size() > 2) throw std::runtime_error("too many arguments (maximum 2 for nblocks and maxtries)");
if (args.size() == 0) {
args.emplace_back(DEFAULT_NBLOCKS);
} else if (args.at(0) == "0") {
throw std::runtime_error("the first argument (number of blocks to generate, default: " + DEFAULT_NBLOCKS + ") must be an integer value greater than zero");
}
args.emplace(args.begin() + 1, address);
}
static int CommandLineRPC(int argc, char *argv[])
{
std::string strPrint;
int nRet = 0;
try {
// Skip switches
while (argc > 1 && IsSwitchChar(argv[1][0])) {
argc--;
argv++;
}
std::string rpcPass;
if (gArgs.GetBoolArg("-stdinrpcpass", false)) {
NO_STDIN_ECHO();
if (!StdinReady()) {
fputs("RPC password> ", stderr);
fflush(stderr);
}
if (!std::getline(std::cin, rpcPass)) {
throw std::runtime_error("-stdinrpcpass specified but failed to read from standard input");
}
if (StdinTerminal()) {
fputc('\n', stdout);
}
gArgs.ForceSetArg("-rpcpassword", rpcPass);
}
std::vector<std::string> args = std::vector<std::string>(&argv[1], &argv[argc]);
if (gArgs.GetBoolArg("-stdinwalletpassphrase", false)) {
NO_STDIN_ECHO();
std::string walletPass;
if (args.size() < 1 || args[0].substr(0, 16) != "walletpassphrase") {
throw std::runtime_error("-stdinwalletpassphrase is only applicable for walletpassphrase(change)");
}
if (!StdinReady()) {
fputs("Wallet passphrase> ", stderr);
fflush(stderr);
}
if (!std::getline(std::cin, walletPass)) {
throw std::runtime_error("-stdinwalletpassphrase specified but failed to read from standard input");
}
if (StdinTerminal()) {
fputc('\n', stdout);
}
args.insert(args.begin() + 1, walletPass);
}
if (gArgs.GetBoolArg("-stdin", false)) {
// Read one arg per line from stdin and append
std::string line;
while (std::getline(std::cin, line)) {
args.push_back(line);
}
if (StdinTerminal()) {
fputc('\n', stdout);
}
}
std::unique_ptr<BaseRequestHandler> rh;
std::string method;
if (gArgs.IsArgSet("-getinfo")) {
rh.reset(new GetinfoRequestHandler());
} else if (gArgs.GetBoolArg("-netinfo", false)) {
rh.reset(new NetinfoRequestHandler());
} else if (gArgs.GetBoolArg("-generate", false)) {
const UniValue getnewaddress{GetNewAddress()};
const UniValue& error{find_value(getnewaddress, "error")};
if (error.isNull()) {
SetGenerateToAddressArgs(find_value(getnewaddress, "result").get_str(), args);
rh.reset(new GenerateToAddressRequestHandler());
} else {
ParseError(error, strPrint, nRet);
}
} else {
rh.reset(new DefaultRequestHandler());
if (args.size() < 1) {
throw std::runtime_error("too few parameters (need at least command)");
}
method = args[0];
args.erase(args.begin()); // Remove trailing method name from arguments vector
}
if (nRet == 0) {
// Perform RPC call
Optional<std::string> wallet_name{};
if (gArgs.IsArgSet("-rpcwallet")) wallet_name = gArgs.GetArg("-rpcwallet", "");
const UniValue reply = ConnectAndCallRPC(rh.get(), method, args, wallet_name);
// Parse reply
UniValue result = find_value(reply, "result");
const UniValue& error = find_value(reply, "error");
if (error.isNull()) {
if (gArgs.IsArgSet("-getinfo") && !gArgs.IsArgSet("-rpcwallet")) {
GetWalletBalances(result); // fetch multiwallet balances and append to result
}
ParseResult(result, strPrint);
} else {
ParseError(error, strPrint, nRet);
}
}
} catch (const std::exception& e) {
strPrint = std::string("error: ") + e.what();
nRet = EXIT_FAILURE;
} catch (...) {
PrintExceptionContinue(nullptr, "CommandLineRPC()");
throw;
}
if (strPrint != "") {
tfm::format(nRet == 0 ? std::cout : std::cerr, "%s\n", strPrint);
}
return nRet;
}
#ifdef WIN32
// Export main() and ensure working ASLR on Windows.
// Exporting a symbol will prevent the linker from stripping
// the .reloc section from the binary, which is a requirement
// for ASLR. This is a temporary workaround until a fixed
// version of binutils is used for releases.
__declspec(dllexport) int main(int argc, char* argv[])
{
util::WinCmdLineArgs winArgs;
std::tie(argc, argv) = winArgs.get();
#else
int main(int argc, char* argv[])
{
#endif
SetupEnvironment();
if (!SetupNetworking()) {
tfm::format(std::cerr, "Error: Initializing networking failed\n");
return EXIT_FAILURE;
}
event_set_log_callback(&libevent_log_cb);
try {
int ret = AppInitRPC(argc, argv);
if (ret != CONTINUE_EXECUTION)
return ret;
}
catch (const std::exception& e) {
PrintExceptionContinue(&e, "AppInitRPC()");
return EXIT_FAILURE;
} catch (...) {
PrintExceptionContinue(nullptr, "AppInitRPC()");
return EXIT_FAILURE;
}
int ret = EXIT_FAILURE;
try {
ret = CommandLineRPC(argc, argv);
}
catch (const std::exception& e) {
PrintExceptionContinue(&e, "CommandLineRPC()");
} catch (...) {
PrintExceptionContinue(nullptr, "CommandLineRPC()");
}
return ret;
}
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