src/rpc/misc.cpp

   1 // Copyright (c) 2010 Satoshi Nakamoto
   2 // Copyright (c) 2009-2016 The Bitcoin Core developers
   3 // Distributed under the MIT software license, see the accompanying
   4 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   5
   6 #include "base58.h"
   7 #include "clientversion.h"
   8 #include "init.h"
   9 #include "validation.h"
  10 #include "net.h"
  11 #include "netbase.h"
  12 #include "rpc/blockchain.h"
  13 #include "rpc/server.h"
  14 #include "timedata.h"
  15 #include "util.h"
  16 #include "utilstrencodings.h"
  17 #ifdef ENABLE_WALLET
  18 #include "wallet/rpcwallet.h"
  19 #include "wallet/wallet.h"
  20 #include "wallet/walletdb.h"
  21 #endif
  22
  23 #include <stdint.h>
  24 #ifdef HAVE_MALLOC_INFO
  25 #include <malloc.h>
  26 #endif
  27
  28 #include <boost/assign/list_of.hpp>
  29
  30 #include <univalue.h>
  31
  32 /**
  33  * @note Do not add or change anything in the information returned by this
  34  * method. `getinfo` exists for backwards-compatibility only. It combines
  35  * information from wildly different sources in the program, which is a mess,
  36  * and is thus planned to be deprecated eventually.
  37  *
  38  * Based on the source of the information, new information should be added to:
  39  * - `getblockchaininfo`,
  40  * - `getnetworkinfo` or
  41  * - `getwalletinfo`
  42  *
  43  * Or alternatively, create a specific query method for the information.
  44  **/
  45 UniValue getinfo(const JSONRPCRequest& request)
  46 {
  47     if (request.fHelp || request.params.size() != 0)
  48         throw std::runtime_error(
  49             "getinfo\n"
  50             "\nDEPRECATED. Returns an object containing various state info.\n"
  51             "\nResult:\n"
  52             "{\n"
  53             "  \"version\": xxxxx,           (numeric) the server version\n"
  54             "  \"protocolversion\": xxxxx,   (numeric) the protocol version\n"
  55             "  \"walletversion\": xxxxx,     (numeric) the wallet version\n"
  56             "  \"balance\": xxxxxxx,         (numeric) the total bitcoin balance of the wallet\n"
  57             "  \"blocks\": xxxxxx,           (numeric) the current number of blocks processed in the server\n"
  58             "  \"timeoffset\": xxxxx,        (numeric) the time offset\n"
  59             "  \"connections\": xxxxx,       (numeric) the number of connections\n"
  60             "  \"proxy\": \"host:port\",     (string, optional) the proxy used by the server\n"
  61             "  \"difficulty\": xxxxxx,       (numeric) the current difficulty\n"
  62             "  \"testnet\": true|false,      (boolean) if the server is using testnet or not\n"
  63             "  \"keypoololdest\": xxxxxx,    (numeric) the timestamp (seconds since Unix epoch) of the oldest pre-generated key in the key pool\n"
  64             "  \"keypoolsize\": xxxx,        (numeric) how many new keys are pre-generated\n"
  65             "  \"unlocked_until\": ttt,      (numeric) the timestamp in seconds since epoch (midnight Jan 1 1970 GMT) that the wallet is unlocked for transfers, or 0 if the wallet is locked\n"
  66             "  \"paytxfee\": x.xxxx,         (numeric) the transaction fee set in " + CURRENCY_UNIT + "/kB\n"
  67             "  \"relayfee\": x.xxxx,         (numeric) minimum relay fee for transactions in " + CURRENCY_UNIT + "/kB\n"
  68             "  \"errors\": \"...\"           (string) any error messages\n"
  69             "}\n"
  70             "\nExamples:\n"
  71             + HelpExampleCli("getinfo", "")
  72             + HelpExampleRpc("getinfo", "")
  73         );
  74
  75 #ifdef ENABLE_WALLET
  76     CWallet * const pwallet = GetWalletForJSONRPCRequest(request);
  77
  78     LOCK2(cs_main, pwallet ? &pwallet->cs_wallet : NULL);
  79 #else
  80     LOCK(cs_main);
  81 #endif
  82
  83     proxyType proxy;
  84     GetProxy(NET_IPV4, proxy);
  85
  86     UniValue obj(UniValue::VOBJ);
  87     obj.push_back(Pair("version", CLIENT_VERSION));
  88     obj.push_back(Pair("protocolversion", PROTOCOL_VERSION));
  89 #ifdef ENABLE_WALLET
  90     if (pwallet) {
  91         obj.push_back(Pair("walletversion", pwallet->GetVersion()));
  92         obj.push_back(Pair("balance",       ValueFromAmount(pwallet->GetBalance())));
  93     }
  94 #endif
  95     obj.push_back(Pair("blocks",        (int)chainActive.Height()));
  96     obj.push_back(Pair("timeoffset",    GetTimeOffset()));
  97     if(g_connman)
  98         obj.push_back(Pair("connections",   (int)g_connman->GetNodeCount(CConnman::CONNECTIONS_ALL)));
  99     obj.push_back(Pair("proxy",         (proxy.IsValid() ? proxy.proxy.ToStringIPPort() : std::string())));
 100     obj.push_back(Pair("difficulty",    (double)GetDifficulty()));
 101     obj.push_back(Pair("testnet",       Params().NetworkIDString() == CBaseChainParams::TESTNET));
 102 #ifdef ENABLE_WALLET
 103     if (pwallet) {
 104         obj.push_back(Pair("keypoololdest", pwallet->GetOldestKeyPoolTime()));
 105         obj.push_back(Pair("keypoolsize",   (int)pwallet->GetKeyPoolSize()));
 106     }
 107     if (pwallet && pwallet->IsCrypted()) {
 108         obj.push_back(Pair("unlocked_until", pwallet->nRelockTime));
 109     }
 110     obj.push_back(Pair("paytxfee",      ValueFromAmount(payTxFee.GetFeePerK())));
 111 #endif
 112     obj.push_back(Pair("relayfee",      ValueFromAmount(::minRelayTxFee.GetFeePerK())));
 113     obj.push_back(Pair("errors",        GetWarnings("statusbar")));
 114     return obj;
 115 }
 116
 117 #ifdef ENABLE_WALLET
 118 class DescribeAddressVisitor : public boost::static_visitor<UniValue>
 119 {
 120 public:
 121     CWallet * const pwallet;
 122
 123     DescribeAddressVisitor(CWallet *_pwallet) : pwallet(_pwallet) {}
 124
 125     UniValue operator()(const CNoDestination &dest) const { return UniValue(UniValue::VOBJ); }
 126
 127     UniValue operator()(const CKeyID &keyID) const {
 128         UniValue obj(UniValue::VOBJ);
 129         CPubKey vchPubKey;
 130         obj.push_back(Pair("isscript", false));
 131         if (pwallet && pwallet->GetPubKey(keyID, vchPubKey)) {
 132             obj.push_back(Pair("pubkey", HexStr(vchPubKey)));
 133             obj.push_back(Pair("iscompressed", vchPubKey.IsCompressed()));
 134         }
 135         return obj;
 136     }
 137
 138     UniValue operator()(const CScriptID &scriptID) const {
 139         UniValue obj(UniValue::VOBJ);
 140         CScript subscript;
 141         obj.push_back(Pair("isscript", true));
 142         if (pwallet && pwallet->GetCScript(scriptID, subscript)) {
 143             std::vector<CTxDestination> addresses;
 144             txnouttype whichType;
 145             int nRequired;
 146             ExtractDestinations(subscript, whichType, addresses, nRequired);
 147             obj.push_back(Pair("script", GetTxnOutputType(whichType)));
 148             obj.push_back(Pair("hex", HexStr(subscript.begin(), subscript.end())));
 149             UniValue a(UniValue::VARR);
 150             BOOST_FOREACH(const CTxDestination& addr, addresses)
 151                 a.push_back(CBitcoinAddress(addr).ToString());
 152             obj.push_back(Pair("addresses", a));
 153             if (whichType == TX_MULTISIG)
 154                 obj.push_back(Pair("sigsrequired", nRequired));
 155         }
 156         return obj;
 157     }
 158 };
 159 #endif
 160
 161 UniValue validateaddress(const JSONRPCRequest& request)
 162 {
 163     if (request.fHelp || request.params.size() != 1)
 164         throw std::runtime_error(
 165             "validateaddress \"address\"\n"
 166             "\nReturn information about the given bitcoin address.\n"
 167             "\nArguments:\n"
 168             "1. \"address\"     (string, required) The bitcoin address to validate\n"
 169             "\nResult:\n"
 170             "{\n"
 171             "  \"isvalid\" : true|false,       (boolean) If the address is valid or not. If not, this is the only property returned.\n"
 172             "  \"address\" : \"address\", (string) The bitcoin address validated\n"
 173             "  \"scriptPubKey\" : \"hex\",       (string) The hex encoded scriptPubKey generated by the address\n"
 174             "  \"ismine\" : true|false,        (boolean) If the address is yours or not\n"
 175             "  \"iswatchonly\" : true|false,   (boolean) If the address is watchonly\n"
 176             "  \"isscript\" : true|false,      (boolean) If the key is a script\n"
 177             "  \"pubkey\" : \"publickeyhex\",    (string) The hex value of the raw public key\n"
 178             "  \"iscompressed\" : true|false,  (boolean) If the address is compressed\n"
 179             "  \"account\" : \"account\"         (string) DEPRECATED. The account associated with the address, \"\" is the default account\n"
 180             "  \"timestamp\" : timestamp,        (number, optional) The creation time of the key if available in seconds since epoch (Jan 1 1970 GMT)\n"
 181             "  \"hdkeypath\" : \"keypath\"       (string, optional) The HD keypath if the key is HD and available\n"
 182             "  \"hdmasterkeyid\" : \"<hash160>\" (string, optional) The Hash160 of the HD master pubkey\n"
 183             "}\n"
 184             "\nExamples:\n"
 185             + HelpExampleCli("validateaddress", "\"1PSSGeFHDnKNxiEyFrD1wcEaHr9hrQDDWc\"")
 186             + HelpExampleRpc("validateaddress", "\"1PSSGeFHDnKNxiEyFrD1wcEaHr9hrQDDWc\"")
 187         );
 188
 189 #ifdef ENABLE_WALLET
 190     CWallet * const pwallet = GetWalletForJSONRPCRequest(request);
 191
 192     LOCK2(cs_main, pwallet ? &pwallet->cs_wallet : NULL);
 193 #else
 194     LOCK(cs_main);
 195 #endif
 196
 197     CBitcoinAddress address(request.params[0].get_str());
 198     bool isValid = address.IsValid();
 199
 200     UniValue ret(UniValue::VOBJ);
 201     ret.push_back(Pair("isvalid", isValid));
 202     if (isValid)
 203     {
 204         CTxDestination dest = address.Get();
 205         std::string currentAddress = address.ToString();
 206         ret.push_back(Pair("address", currentAddress));
 207
 208         CScript scriptPubKey = GetScriptForDestination(dest);
 209         ret.push_back(Pair("scriptPubKey", HexStr(scriptPubKey.begin(), scriptPubKey.end())));
 210
 211 #ifdef ENABLE_WALLET
 212         isminetype mine = pwallet ? IsMine(*pwallet, dest) : ISMINE_NO;
 213         ret.push_back(Pair("ismine", (mine & ISMINE_SPENDABLE) ? true : false));
 214         ret.push_back(Pair("iswatchonly", (mine & ISMINE_WATCH_ONLY) ? true: false));
 215         UniValue detail = boost::apply_visitor(DescribeAddressVisitor(pwallet), dest);
 216         ret.pushKVs(detail);
 217         if (pwallet && pwallet->mapAddressBook.count(dest)) {
 218             ret.push_back(Pair("account", pwallet->mapAddressBook[dest].name));
 219         }
 220         CKeyID keyID;
 221         if (pwallet) {
 222             const auto& meta = pwallet->mapKeyMetadata;
 223             auto it = address.GetKeyID(keyID) ? meta.find(keyID) : meta.end();
 224             if (it == meta.end()) {
 225                 it = meta.find(CScriptID(scriptPubKey));
 226             }
 227             if (it != meta.end()) {
 228                 ret.push_back(Pair("timestamp", it->second.nCreateTime));
 229                 if (!it->second.hdKeypath.empty()) {
 230                     ret.push_back(Pair("hdkeypath", it->second.hdKeypath));
 231                     ret.push_back(Pair("hdmasterkeyid", it->second.hdMasterKeyID.GetHex()));
 232                 }
 233             }
 234         }
 235 #endif
 236     }
 237     return ret;
 238 }
 239
 240 // Needed even with !ENABLE_WALLET, to pass (ignored) pointers around
 241 class CWallet;
 242
 243 /**
 244  * Used by addmultisigaddress / createmultisig:
 245  */
 246 CScript _createmultisig_redeemScript(CWallet * const pwallet, const UniValue& params)
 247 {
 248     int nRequired = params[0].get_int();
 249     const UniValue& keys = params[1].get_array();
 250
 251     // Gather public keys
 252     if (nRequired < 1)
 253         throw std::runtime_error("a multisignature address must require at least one key to redeem");
 254     if ((int)keys.size() < nRequired)
 255         throw std::runtime_error(
 256             strprintf("not enough keys supplied "
 257                       "(got %u keys, but need at least %d to redeem)", keys.size(), nRequired));
 258     if (keys.size() > 16)
 259         throw std::runtime_error("Number of addresses involved in the multisignature address creation > 16\nReduce the number");
 260     std::vector<CPubKey> pubkeys;
 261     pubkeys.resize(keys.size());
 262     for (unsigned int i = 0; i < keys.size(); i++)
 263     {
 264         const std::string& ks = keys[i].get_str();
 265 #ifdef ENABLE_WALLET
 266         // Case 1: Bitcoin address and we have full public key:
 267         CBitcoinAddress address(ks);
 268         if (pwallet && address.IsValid()) {
 269             CKeyID keyID;
 270             if (!address.GetKeyID(keyID))
 271                 throw std::runtime_error(
 272                     strprintf("%s does not refer to a key",ks));
 273             CPubKey vchPubKey;
 274             if (!pwallet->GetPubKey(keyID, vchPubKey)) {
 275                 throw std::runtime_error(
 276                     strprintf("no full public key for address %s",ks));
 277             }
 278             if (!vchPubKey.IsFullyValid())
 279                 throw std::runtime_error(" Invalid public key: "+ks);
 280             pubkeys[i] = vchPubKey;
 281         }
 282
 283         // Case 2: hex public key
 284         else
 285 #endif
 286         if (IsHex(ks))
 287         {
 288             CPubKey vchPubKey(ParseHex(ks));
 289             if (!vchPubKey.IsFullyValid())
 290                 throw std::runtime_error(" Invalid public key: "+ks);
 291             pubkeys[i] = vchPubKey;
 292         }
 293         else
 294         {
 295             throw std::runtime_error(" Invalid public key: "+ks);
 296         }
 297     }
 298     CScript result = GetScriptForMultisig(nRequired, pubkeys);
 299
 300     if (result.size() > MAX_SCRIPT_ELEMENT_SIZE)
 301         throw std::runtime_error(
 302                 strprintf("redeemScript exceeds size limit: %d > %d", result.size(), MAX_SCRIPT_ELEMENT_SIZE));
 303
 304     return result;
 305 }
 306
 307 UniValue createmultisig(const JSONRPCRequest& request)
 308 {
 309 #ifdef ENABLE_WALLET
 310     CWallet * const pwallet = GetWalletForJSONRPCRequest(request);
 311 #else
 312     CWallet * const pwallet = NULL;
 313 #endif
 314
 315     if (request.fHelp || request.params.size() < 2 || request.params.size() > 2)
 316     {
 317         std::string msg = "createmultisig nrequired [\"key\",...]\n"
 318             "\nCreates a multi-signature address with n signature of m keys required.\n"
 319             "It returns a json object with the address and redeemScript.\n"
 320
 321             "\nArguments:\n"
 322             "1. nrequired      (numeric, required) The number of required signatures out of the n keys or addresses.\n"
 323             "2. \"keys\"       (string, required) A json array of keys which are bitcoin addresses or hex-encoded public keys\n"
 324             "     [\n"
 325             "       \"key\"    (string) bitcoin address or hex-encoded public key\n"
 326             "       ,...\n"
 327             "     ]\n"
 328
 329             "\nResult:\n"
 330             "{\n"
 331             "  \"address\":\"multisigaddress\",  (string) The value of the new multisig address.\n"
 332             "  \"redeemScript\":\"script\"       (string) The string value of the hex-encoded redemption script.\n"
 333             "}\n"
 334
 335             "\nExamples:\n"
 336             "\nCreate a multisig address from 2 addresses\n"
 337             + HelpExampleCli("createmultisig", "2 \"[\\\"16sSauSf5pF2UkUwvKGq4qjNRzBZYqgEL5\\\",\\\"171sgjn4YtPu27adkKGrdDwzRTxnRkBfKV\\\"]\"") +
 338             "\nAs a json rpc call\n"
 339             + HelpExampleRpc("createmultisig", "2, \"[\\\"16sSauSf5pF2UkUwvKGq4qjNRzBZYqgEL5\\\",\\\"171sgjn4YtPu27adkKGrdDwzRTxnRkBfKV\\\"]\"")
 340         ;
 341         throw std::runtime_error(msg);
 342     }
 343
 344     // Construct using pay-to-script-hash:
 345     CScript inner = _createmultisig_redeemScript(pwallet, request.params);
 346     CScriptID innerID(inner);
 347     CBitcoinAddress address(innerID);
 348
 349     UniValue result(UniValue::VOBJ);
 350     result.push_back(Pair("address", address.ToString()));
 351     result.push_back(Pair("redeemScript", HexStr(inner.begin(), inner.end())));
 352
 353     return result;
 354 }
 355
 356 UniValue verifymessage(const JSONRPCRequest& request)
 357 {
 358     if (request.fHelp || request.params.size() != 3)
 359         throw std::runtime_error(
 360             "verifymessage \"address\" \"signature\" \"message\"\n"
 361             "\nVerify a signed message\n"
 362             "\nArguments:\n"
 363             "1. \"address\"         (string, required) The bitcoin address to use for the signature.\n"
 364             "2. \"signature\"       (string, required) The signature provided by the signer in base 64 encoding (see signmessage).\n"
 365             "3. \"message\"         (string, required) The message that was signed.\n"
 366             "\nResult:\n"
 367             "true|false   (boolean) If the signature is verified or not.\n"
 368             "\nExamples:\n"
 369             "\nUnlock the wallet for 30 seconds\n"
 370             + HelpExampleCli("walletpassphrase", "\"mypassphrase\" 30") +
 371             "\nCreate the signature\n"
 372             + HelpExampleCli("signmessage", "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\" \"my message\"") +
 373             "\nVerify the signature\n"
 374             + HelpExampleCli("verifymessage", "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\" \"signature\" \"my message\"") +
 375             "\nAs json rpc\n"
 376             + HelpExampleRpc("verifymessage", "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\", \"signature\", \"my message\"")
 377         );
 378
 379     LOCK(cs_main);
 380
 381     std::string strAddress  = request.params[0].get_str();
 382     std::string strSign     = request.params[1].get_str();
 383     std::string strMessage  = request.params[2].get_str();
 384
 385     CBitcoinAddress addr(strAddress);
 386     if (!addr.IsValid())
 387         throw JSONRPCError(RPC_TYPE_ERROR, "Invalid address");
 388
 389     CKeyID keyID;
 390     if (!addr.GetKeyID(keyID))
 391         throw JSONRPCError(RPC_TYPE_ERROR, "Address does not refer to key");
 392
 393     bool fInvalid = false;
 394     std::vector<unsigned char> vchSig = DecodeBase64(strSign.c_str(), &fInvalid);
 395
 396     if (fInvalid)
 397         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Malformed base64 encoding");
 398
 399     CHashWriter ss(SER_GETHASH, 0);
 400     ss << strMessageMagic;
 401     ss << strMessage;
 402
 403     CPubKey pubkey;
 404     if (!pubkey.RecoverCompact(ss.GetHash(), vchSig))
 405         return false;
 406
 407     return (pubkey.GetID() == keyID);
 408 }
 409
 410 UniValue signmessagewithprivkey(const JSONRPCRequest& request)
 411 {
 412     if (request.fHelp || request.params.size() != 2)
 413         throw std::runtime_error(
 414             "signmessagewithprivkey \"privkey\" \"message\"\n"
 415             "\nSign a message with the private key of an address\n"
 416             "\nArguments:\n"
 417             "1. \"privkey\"         (string, required) The private key to sign the message with.\n"
 418             "2. \"message\"         (string, required) The message to create a signature of.\n"
 419             "\nResult:\n"
 420             "\"signature\"          (string) The signature of the message encoded in base 64\n"
 421             "\nExamples:\n"
 422             "\nCreate the signature\n"
 423             + HelpExampleCli("signmessagewithprivkey", "\"privkey\" \"my message\"") +
 424             "\nVerify the signature\n"
 425             + HelpExampleCli("verifymessage", "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\" \"signature\" \"my message\"") +
 426             "\nAs json rpc\n"
 427             + HelpExampleRpc("signmessagewithprivkey", "\"privkey\", \"my message\"")
 428         );
 429
 430     std::string strPrivkey = request.params[0].get_str();
 431     std::string strMessage = request.params[1].get_str();
 432
 433     CBitcoinSecret vchSecret;
 434     bool fGood = vchSecret.SetString(strPrivkey);
 435     if (!fGood)
 436         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid private key");
 437     CKey key = vchSecret.GetKey();
 438     if (!key.IsValid())
 439         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Private key outside allowed range");
 440
 441     CHashWriter ss(SER_GETHASH, 0);
 442     ss << strMessageMagic;
 443     ss << strMessage;
 444
 445     std::vector<unsigned char> vchSig;
 446     if (!key.SignCompact(ss.GetHash(), vchSig))
 447         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Sign failed");
 448
 449     return EncodeBase64(&vchSig[0], vchSig.size());
 450 }
 451
 452 UniValue setmocktime(const JSONRPCRequest& request)
 453 {
 454     if (request.fHelp || request.params.size() != 1)
 455         throw std::runtime_error(
 456             "setmocktime timestamp\n"
 457             "\nSet the local time to given timestamp (-regtest only)\n"
 458             "\nArguments:\n"
 459             "1. timestamp  (integer, required) Unix seconds-since-epoch timestamp\n"
 460             "   Pass 0 to go back to using the system time."
 461         );
 462
 463     if (!Params().MineBlocksOnDemand())
 464         throw std::runtime_error("setmocktime for regression testing (-regtest mode) only");
 465
 466     // For now, don't change mocktime if we're in the middle of validation, as
 467     // this could have an effect on mempool time-based eviction, as well as
 468     // IsCurrentForFeeEstimation() and IsInitialBlockDownload().
 469     // TODO: figure out the right way to synchronize around mocktime, and
 470     // ensure all call sites of GetTime() are accessing this safely.
 471     LOCK(cs_main);
 472
 473     RPCTypeCheck(request.params, boost::assign::list_of(UniValue::VNUM));
 474     SetMockTime(request.params[0].get_int64());
 475
 476     return NullUniValue;
 477 }
 478
 479 static UniValue RPCLockedMemoryInfo()
 480 {
 481     LockedPool::Stats stats = LockedPoolManager::Instance().stats();
 482     UniValue obj(UniValue::VOBJ);
 483     obj.push_back(Pair("used", uint64_t(stats.used)));
 484     obj.push_back(Pair("free", uint64_t(stats.free)));
 485     obj.push_back(Pair("total", uint64_t(stats.total)));
 486     obj.push_back(Pair("locked", uint64_t(stats.locked)));
 487     obj.push_back(Pair("chunks_used", uint64_t(stats.chunks_used)));
 488     obj.push_back(Pair("chunks_free", uint64_t(stats.chunks_free)));
 489     return obj;
 490 }
 491
 492 #ifdef HAVE_MALLOC_INFO
 493 static std::string RPCMallocInfo()
 494 {
 495     char *ptr = nullptr;
 496     size_t size = 0;
 497     FILE *f = open_memstream(&ptr, &size);
 498     if (f) {
 499         malloc_info(0, f);
 500         fclose(f);
 501         if (ptr) {
 502             std::string rv(ptr, size);
 503             free(ptr);
 504             return rv;
 505         }
 506     }
 507     return "";
 508 }
 509 #endif
 510
 511 UniValue getmemoryinfo(const JSONRPCRequest& request)
 512 {
 513     /* Please, avoid using the word "pool" here in the RPC interface or help,
 514      * as users will undoubtedly confuse it with the other "memory pool"
 515      */
 516     if (request.fHelp || request.params.size() > 1)
 517         throw std::runtime_error(
 518             "getmemoryinfo (\"mode\")\n"
 519             "Returns an object containing information about memory usage.\n"
 520             "Arguments:\n"
 521             "1. \"mode\" determines what kind of information is returned. This argument is optional, the default mode is \"stats\".\n"
 522             "  - \"stats\" returns general statistics about memory usage in the daemon.\n"
 523             "  - \"mallocinfo\" returns an XML string describing low-level heap state (only available if compiled with glibc 2.10+).\n"
 524             "\nResult (mode \"stats\"):\n"
 525             "{\n"
 526             "  \"locked\": {               (json object) Information about locked memory manager\n"
 527             "    \"used\": xxxxx,          (numeric) Number of bytes used\n"
 528             "    \"free\": xxxxx,          (numeric) Number of bytes available in current arenas\n"
 529             "    \"total\": xxxxxxx,       (numeric) Total number of bytes managed\n"
 530             "    \"locked\": xxxxxx,       (numeric) Amount of bytes that succeeded locking. If this number is smaller than total, locking pages failed at some point and key data could be swapped to disk.\n"
 531             "    \"chunks_used\": xxxxx,   (numeric) Number allocated chunks\n"
 532             "    \"chunks_free\": xxxxx,   (numeric) Number unused chunks\n"
 533             "  }\n"
 534             "}\n"
 535             "\nResult (mode \"mallocinfo\"):\n"
 536             "\"<malloc version=\"1\">...\"\n"
 537             "\nExamples:\n"
 538             + HelpExampleCli("getmemoryinfo", "")
 539             + HelpExampleRpc("getmemoryinfo", "")
 540         );
 541
 542     std::string mode = (request.params.size() < 1 || request.params[0].isNull()) ? "stats" : request.params[0].get_str();
 543     if (mode == "stats") {
 544         UniValue obj(UniValue::VOBJ);
 545         obj.push_back(Pair("locked", RPCLockedMemoryInfo()));
 546         return obj;
 547     } else if (mode == "mallocinfo") {
 548 #ifdef HAVE_MALLOC_INFO
 549         return RPCMallocInfo();
 550 #else
 551         throw JSONRPCError(RPC_INVALID_PARAMETER, "mallocinfo is only available when compiled with glibc 2.10+");
 552 #endif
 553     } else {
 554         throw JSONRPCError(RPC_INVALID_PARAMETER, "unknown mode " + mode);
 555     }
 556 }
 557
 558 UniValue echo(const JSONRPCRequest& request)
 559 {
 560     if (request.fHelp)
 561         throw std::runtime_error(
 562             "echo|echojson \"message\" ...\n"
 563             "\nSimply echo back the input arguments. This command is for testing.\n"
 564             "\nThe difference between echo and echojson is that echojson has argument conversion enabled in the client-side table in"
 565             "bitcoin-cli and the GUI. There is no server-side difference."
 566         );
 567
 568     return request.params;
 569 }
 570
 571 static const CRPCCommand commands[] =
 572 { //  category              name                      actor (function)         okSafeMode
 573   //  --------------------- ------------------------  -----------------------  ----------
 574     { "control",            "getinfo",                &getinfo,                true,  {} }, /* uses wallet if enabled */
 575     { "control",            "getmemoryinfo",          &getmemoryinfo,          true,  {"mode"} },
 576     { "util",               "validateaddress",        &validateaddress,        true,  {"address"} }, /* uses wallet if enabled */
 577     { "util",               "createmultisig",         &createmultisig,         true,  {"nrequired","keys"} },
 578     { "util",               "verifymessage",          &verifymessage,          true,  {"address","signature","message"} },
 579     { "util",               "signmessagewithprivkey", &signmessagewithprivkey, true,  {"privkey","message"} },
 580
 581     /* Not shown in help */
 582     { "hidden",             "setmocktime",            &setmocktime,            true,  {"timestamp"}},
 583     { "hidden",             "echo",                   &echo,                   true,  {"arg0","arg1","arg2","arg3","arg4","arg5","arg6","arg7","arg8","arg9"}},
 584     { "hidden",             "echojson",               &echo,                  true,  {"arg0","arg1","arg2","arg3","arg4","arg5","arg6","arg7","arg8","arg9"}},
 585 };
 586
 587 void RegisterMiscRPCCommands(CRPCTable &t)
 588 {
 589     for (unsigned int vcidx = 0; vcidx < ARRAYLEN(commands); vcidx++)
 590         t.appendCommand(commands[vcidx].name, &commands[vcidx]);
 591 }