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 "chain.h"
   8 #include "clientversion.h"
   9 #include "core_io.h"
  10 #include "crypto/ripemd160.h"
  11 #include "init.h"
  12 #include "validation.h"
  13 #include "httpserver.h"
  14 #include "net.h"
  15 #include "netbase.h"
  16 #include "rpc/blockchain.h"
  17 #include "rpc/server.h"
  18 #include "timedata.h"
  19 #include "util.h"
  20 #include "utilstrencodings.h"
  21 #ifdef ENABLE_WALLET
  22 #include "wallet/rpcwallet.h"
  23 #include "wallet/wallet.h"
  24 #include "wallet/walletdb.h"
  25 #endif
  26 #include "warnings.h"
  27
  28 #include <stdint.h>
  29 #ifdef HAVE_MALLOC_INFO
  30 #include <malloc.h>
  31 #endif
  32
  33 #include <univalue.h>
  34
  35 #ifdef ENABLE_WALLET
  36 class DescribeAddressVisitor : public boost::static_visitor<UniValue>
  37 {
  38 public:
  39     CWallet * const pwallet;
  40
  41     explicit DescribeAddressVisitor(CWallet *_pwallet) : pwallet(_pwallet) {}
  42
  43     UniValue operator()(const CNoDestination &dest) const { return UniValue(UniValue::VOBJ); }
  44
  45     UniValue operator()(const CKeyID &keyID) const {
  46         UniValue obj(UniValue::VOBJ);
  47         CPubKey vchPubKey;
  48         obj.push_back(Pair("isscript", false));
  49         obj.push_back(Pair("iswitness", false));
  50         if (pwallet && pwallet->GetPubKey(keyID, vchPubKey)) {
  51             obj.push_back(Pair("pubkey", HexStr(vchPubKey)));
  52             obj.push_back(Pair("iscompressed", vchPubKey.IsCompressed()));
  53         }
  54         return obj;
  55     }
  56
  57     UniValue operator()(const CScriptID &scriptID) const {
  58         UniValue obj(UniValue::VOBJ);
  59         CScript subscript;
  60         obj.push_back(Pair("isscript", true));
  61         obj.push_back(Pair("iswitness", false));
  62         if (pwallet && pwallet->GetCScript(scriptID, subscript)) {
  63             std::vector<CTxDestination> addresses;
  64             txnouttype whichType;
  65             int nRequired;
  66             ExtractDestinations(subscript, whichType, addresses, nRequired);
  67             obj.push_back(Pair("script", GetTxnOutputType(whichType)));
  68             obj.push_back(Pair("hex", HexStr(subscript.begin(), subscript.end())));
  69             UniValue a(UniValue::VARR);
  70             for (const CTxDestination& addr : addresses) {
  71                 a.push_back(EncodeDestination(addr));
  72             }
  73             obj.push_back(Pair("addresses", a));
  74             if (whichType == TX_MULTISIG)
  75                 obj.push_back(Pair("sigsrequired", nRequired));
  76         }
  77         return obj;
  78     }
  79
  80     UniValue operator()(const WitnessV0KeyHash& id) const
  81     {
  82         UniValue obj(UniValue::VOBJ);
  83         CPubKey pubkey;
  84         obj.push_back(Pair("isscript", false));
  85         obj.push_back(Pair("iswitness", true));
  86         obj.push_back(Pair("witness_version", 0));
  87         obj.push_back(Pair("witness_program", HexStr(id.begin(), id.end())));
  88         if (pwallet && pwallet->GetPubKey(CKeyID(id), pubkey)) {
  89             obj.push_back(Pair("pubkey", HexStr(pubkey)));
  90         }
  91         return obj;
  92     }
  93
  94     UniValue operator()(const WitnessV0ScriptHash& id) const
  95     {
  96         UniValue obj(UniValue::VOBJ);
  97         CScript subscript;
  98         obj.push_back(Pair("isscript", true));
  99         obj.push_back(Pair("iswitness", true));
 100         obj.push_back(Pair("witness_version", 0));
 101         obj.push_back(Pair("witness_program", HexStr(id.begin(), id.end())));
 102         CRIPEMD160 hasher;
 103         uint160 hash;
 104         hasher.Write(id.begin(), 32).Finalize(hash.begin());
 105         if (pwallet && pwallet->GetCScript(CScriptID(hash), subscript)) {
 106             obj.push_back(Pair("hex", HexStr(subscript.begin(), subscript.end())));
 107         }
 108         return obj;
 109     }
 110
 111     UniValue operator()(const WitnessUnknown& id) const
 112     {
 113         UniValue obj(UniValue::VOBJ);
 114         CScript subscript;
 115         obj.push_back(Pair("iswitness", true));
 116         obj.push_back(Pair("witness_version", (int)id.version));
 117         obj.push_back(Pair("witness_program", HexStr(id.program, id.program + id.length)));
 118         return obj;
 119     }
 120 };
 121 #endif
 122
 123 UniValue validateaddress(const JSONRPCRequest& request)
 124 {
 125     if (request.fHelp || request.params.size() != 1)
 126         throw std::runtime_error(
 127             "validateaddress \"address\"\n"
 128             "\nReturn information about the given bitcoin address.\n"
 129             "\nArguments:\n"
 130             "1. \"address\"     (string, required) The bitcoin address to validate\n"
 131             "\nResult:\n"
 132             "{\n"
 133             "  \"isvalid\" : true|false,       (boolean) If the address is valid or not. If not, this is the only property returned.\n"
 134             "  \"address\" : \"address\", (string) The bitcoin address validated\n"
 135             "  \"scriptPubKey\" : \"hex\",       (string) The hex encoded scriptPubKey generated by the address\n"
 136             "  \"ismine\" : true|false,        (boolean) If the address is yours or not\n"
 137             "  \"iswatchonly\" : true|false,   (boolean) If the address is watchonly\n"
 138             "  \"isscript\" : true|false,      (boolean) If the key is a script\n"
 139             "  \"script\" : \"type\"             (string, optional) The output script type. Possible types: nonstandard, pubkey, pubkeyhash, scripthash, multisig, nulldata, witness_v0_keyhash, witness_v0_scripthash\n"
 140             "  \"hex\" : \"hex\",                (string, optional) The redeemscript for the p2sh address\n"
 141             "  \"addresses\"                   (string, optional) Array of addresses associated with the known redeemscript\n"
 142             "    [\n"
 143             "      \"address\"\n"
 144             "      ,...\n"
 145             "    ]\n"
 146             "  \"sigsrequired\" : xxxxx        (numeric, optional) Number of signatures required to spend multisig output\n"
 147             "  \"pubkey\" : \"publickeyhex\",    (string) The hex value of the raw public key\n"
 148             "  \"iscompressed\" : true|false,  (boolean) If the address is compressed\n"
 149             "  \"account\" : \"account\"         (string) DEPRECATED. The account associated with the address, \"\" is the default account\n"
 150             "  \"timestamp\" : timestamp,        (number, optional) The creation time of the key if available in seconds since epoch (Jan 1 1970 GMT)\n"
 151             "  \"hdkeypath\" : \"keypath\"       (string, optional) The HD keypath if the key is HD and available\n"
 152             "  \"hdmasterkeyid\" : \"<hash160>\" (string, optional) The Hash160 of the HD master pubkey\n"
 153             "}\n"
 154             "\nExamples:\n"
 155             + HelpExampleCli("validateaddress", "\"1PSSGeFHDnKNxiEyFrD1wcEaHr9hrQDDWc\"")
 156             + HelpExampleRpc("validateaddress", "\"1PSSGeFHDnKNxiEyFrD1wcEaHr9hrQDDWc\"")
 157         );
 158
 159 #ifdef ENABLE_WALLET
 160     CWallet * const pwallet = GetWalletForJSONRPCRequest(request);
 161
 162     LOCK2(cs_main, pwallet ? &pwallet->cs_wallet : nullptr);
 163 #else
 164     LOCK(cs_main);
 165 #endif
 166
 167     CTxDestination dest = DecodeDestination(request.params[0].get_str());
 168     bool isValid = IsValidDestination(dest);
 169
 170     UniValue ret(UniValue::VOBJ);
 171     ret.push_back(Pair("isvalid", isValid));
 172     if (isValid)
 173     {
 174         std::string currentAddress = EncodeDestination(dest);
 175         ret.push_back(Pair("address", currentAddress));
 176
 177         CScript scriptPubKey = GetScriptForDestination(dest);
 178         ret.push_back(Pair("scriptPubKey", HexStr(scriptPubKey.begin(), scriptPubKey.end())));
 179
 180 #ifdef ENABLE_WALLET
 181         isminetype mine = pwallet ? IsMine(*pwallet, dest) : ISMINE_NO;
 182         ret.push_back(Pair("ismine", bool(mine & ISMINE_SPENDABLE)));
 183         ret.push_back(Pair("iswatchonly", bool(mine & ISMINE_WATCH_ONLY)));
 184         UniValue detail = boost::apply_visitor(DescribeAddressVisitor(pwallet), dest);
 185         ret.pushKVs(detail);
 186         if (pwallet && pwallet->mapAddressBook.count(dest)) {
 187             ret.push_back(Pair("account", pwallet->mapAddressBook[dest].name));
 188         }
 189         if (pwallet) {
 190             const auto& meta = pwallet->mapKeyMetadata;
 191             const CKeyID *keyID = boost::get<CKeyID>(&dest);
 192             auto it = keyID ? meta.find(*keyID) : meta.end();
 193             if (it == meta.end()) {
 194                 it = meta.find(CScriptID(scriptPubKey));
 195             }
 196             if (it != meta.end()) {
 197                 ret.push_back(Pair("timestamp", it->second.nCreateTime));
 198                 if (!it->second.hdKeypath.empty()) {
 199                     ret.push_back(Pair("hdkeypath", it->second.hdKeypath));
 200                     ret.push_back(Pair("hdmasterkeyid", it->second.hdMasterKeyID.GetHex()));
 201                 }
 202             }
 203         }
 204 #endif
 205     }
 206     return ret;
 207 }
 208
 209 // Needed even with !ENABLE_WALLET, to pass (ignored) pointers around
 210 class CWallet;
 211
 212 /**
 213  * Used by addmultisigaddress / createmultisig:
 214  */
 215 CScript _createmultisig_redeemScript(CWallet * const pwallet, const UniValue& params)
 216 {
 217     int nRequired = params[0].get_int();
 218     const UniValue& keys = params[1].get_array();
 219
 220     // Gather public keys
 221     if (nRequired < 1)
 222         throw std::runtime_error("a multisignature address must require at least one key to redeem");
 223     if ((int)keys.size() < nRequired)
 224         throw std::runtime_error(
 225             strprintf("not enough keys supplied "
 226                       "(got %u keys, but need at least %d to redeem)", keys.size(), nRequired));
 227     if (keys.size() > 16)
 228         throw std::runtime_error("Number of addresses involved in the multisignature address creation > 16\nReduce the number");
 229     std::vector<CPubKey> pubkeys;
 230     pubkeys.resize(keys.size());
 231     for (unsigned int i = 0; i < keys.size(); i++)
 232     {
 233         const std::string& ks = keys[i].get_str();
 234 #ifdef ENABLE_WALLET
 235         // Case 1: Bitcoin address and we have full public key:
 236         CTxDestination dest = DecodeDestination(ks);
 237         if (pwallet && IsValidDestination(dest)) {
 238             const CKeyID *keyID = boost::get<CKeyID>(&dest);
 239             if (!keyID) {
 240                 throw std::runtime_error(strprintf("%s does not refer to a key", ks));
 241             }
 242             CPubKey vchPubKey;
 243             if (!pwallet->GetPubKey(*keyID, vchPubKey)) {
 244                 throw std::runtime_error(strprintf("no full public key for address %s", ks));
 245             }
 246             if (!vchPubKey.IsFullyValid())
 247                 throw std::runtime_error(" Invalid public key: "+ks);
 248             pubkeys[i] = vchPubKey;
 249         }
 250
 251         // Case 2: hex public key
 252         else
 253 #endif
 254         if (IsHex(ks))
 255         {
 256             CPubKey vchPubKey(ParseHex(ks));
 257             if (!vchPubKey.IsFullyValid())
 258                 throw std::runtime_error(" Invalid public key: "+ks);
 259             pubkeys[i] = vchPubKey;
 260         }
 261         else
 262         {
 263             throw std::runtime_error(" Invalid public key: "+ks);
 264         }
 265     }
 266     CScript result = GetScriptForMultisig(nRequired, pubkeys);
 267
 268     if (result.size() > MAX_SCRIPT_ELEMENT_SIZE)
 269         throw std::runtime_error(
 270                 strprintf("redeemScript exceeds size limit: %d > %d", result.size(), MAX_SCRIPT_ELEMENT_SIZE));
 271
 272     return result;
 273 }
 274
 275 UniValue createmultisig(const JSONRPCRequest& request)
 276 {
 277 #ifdef ENABLE_WALLET
 278     CWallet * const pwallet = GetWalletForJSONRPCRequest(request);
 279 #else
 280     CWallet * const pwallet = nullptr;
 281 #endif
 282
 283     if (request.fHelp || request.params.size() < 2 || request.params.size() > 2)
 284     {
 285         std::string msg = "createmultisig nrequired [\"key\",...]\n"
 286             "\nCreates a multi-signature address with n signature of m keys required.\n"
 287             "It returns a json object with the address and redeemScript.\n"
 288
 289             "\nArguments:\n"
 290             "1. nrequired      (numeric, required) The number of required signatures out of the n keys or addresses.\n"
 291             "2. \"keys\"       (string, required) A json array of keys which are bitcoin addresses or hex-encoded public keys\n"
 292             "     [\n"
 293             "       \"key\"    (string) bitcoin address or hex-encoded public key\n"
 294             "       ,...\n"
 295             "     ]\n"
 296
 297             "\nResult:\n"
 298             "{\n"
 299             "  \"address\":\"multisigaddress\",  (string) The value of the new multisig address.\n"
 300             "  \"redeemScript\":\"script\"       (string) The string value of the hex-encoded redemption script.\n"
 301             "}\n"
 302
 303             "\nExamples:\n"
 304             "\nCreate a multisig address from 2 addresses\n"
 305             + HelpExampleCli("createmultisig", "2 \"[\\\"16sSauSf5pF2UkUwvKGq4qjNRzBZYqgEL5\\\",\\\"171sgjn4YtPu27adkKGrdDwzRTxnRkBfKV\\\"]\"") +
 306             "\nAs a json rpc call\n"
 307             + HelpExampleRpc("createmultisig", "2, \"[\\\"16sSauSf5pF2UkUwvKGq4qjNRzBZYqgEL5\\\",\\\"171sgjn4YtPu27adkKGrdDwzRTxnRkBfKV\\\"]\"")
 308         ;
 309         throw std::runtime_error(msg);
 310     }
 311
 312     // Construct using pay-to-script-hash:
 313     CScript inner = _createmultisig_redeemScript(pwallet, request.params);
 314     CScriptID innerID(inner);
 315
 316     UniValue result(UniValue::VOBJ);
 317     result.push_back(Pair("address", EncodeDestination(innerID)));
 318     result.push_back(Pair("redeemScript", HexStr(inner.begin(), inner.end())));
 319
 320     return result;
 321 }
 322
 323 UniValue verifymessage(const JSONRPCRequest& request)
 324 {
 325     if (request.fHelp || request.params.size() != 3)
 326         throw std::runtime_error(
 327             "verifymessage \"address\" \"signature\" \"message\"\n"
 328             "\nVerify a signed message\n"
 329             "\nArguments:\n"
 330             "1. \"address\"         (string, required) The bitcoin address to use for the signature.\n"
 331             "2. \"signature\"       (string, required) The signature provided by the signer in base 64 encoding (see signmessage).\n"
 332             "3. \"message\"         (string, required) The message that was signed.\n"
 333             "\nResult:\n"
 334             "true|false   (boolean) If the signature is verified or not.\n"
 335             "\nExamples:\n"
 336             "\nUnlock the wallet for 30 seconds\n"
 337             + HelpExampleCli("walletpassphrase", "\"mypassphrase\" 30") +
 338             "\nCreate the signature\n"
 339             + HelpExampleCli("signmessage", "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\" \"my message\"") +
 340             "\nVerify the signature\n"
 341             + HelpExampleCli("verifymessage", "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\" \"signature\" \"my message\"") +
 342             "\nAs json rpc\n"
 343             + HelpExampleRpc("verifymessage", "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\", \"signature\", \"my message\"")
 344         );
 345
 346     LOCK(cs_main);
 347
 348     std::string strAddress  = request.params[0].get_str();
 349     std::string strSign     = request.params[1].get_str();
 350     std::string strMessage  = request.params[2].get_str();
 351
 352     CTxDestination destination = DecodeDestination(strAddress);
 353     if (!IsValidDestination(destination)) {
 354         throw JSONRPCError(RPC_TYPE_ERROR, "Invalid address");
 355     }
 356
 357     const CKeyID *keyID = boost::get<CKeyID>(&destination);
 358     if (!keyID) {
 359         throw JSONRPCError(RPC_TYPE_ERROR, "Address does not refer to key");
 360     }
 361
 362     bool fInvalid = false;
 363     std::vector<unsigned char> vchSig = DecodeBase64(strSign.c_str(), &fInvalid);
 364
 365     if (fInvalid)
 366         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Malformed base64 encoding");
 367
 368     CHashWriter ss(SER_GETHASH, 0);
 369     ss << strMessageMagic;
 370     ss << strMessage;
 371
 372     CPubKey pubkey;
 373     if (!pubkey.RecoverCompact(ss.GetHash(), vchSig))
 374         return false;
 375
 376     return (pubkey.GetID() == *keyID);
 377 }
 378
 379 UniValue signmessagewithprivkey(const JSONRPCRequest& request)
 380 {
 381     if (request.fHelp || request.params.size() != 2)
 382         throw std::runtime_error(
 383             "signmessagewithprivkey \"privkey\" \"message\"\n"
 384             "\nSign a message with the private key of an address\n"
 385             "\nArguments:\n"
 386             "1. \"privkey\"         (string, required) The private key to sign the message with.\n"
 387             "2. \"message\"         (string, required) The message to create a signature of.\n"
 388             "\nResult:\n"
 389             "\"signature\"          (string) The signature of the message encoded in base 64\n"
 390             "\nExamples:\n"
 391             "\nCreate the signature\n"
 392             + HelpExampleCli("signmessagewithprivkey", "\"privkey\" \"my message\"") +
 393             "\nVerify the signature\n"
 394             + HelpExampleCli("verifymessage", "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\" \"signature\" \"my message\"") +
 395             "\nAs json rpc\n"
 396             + HelpExampleRpc("signmessagewithprivkey", "\"privkey\", \"my message\"")
 397         );
 398
 399     std::string strPrivkey = request.params[0].get_str();
 400     std::string strMessage = request.params[1].get_str();
 401
 402     CBitcoinSecret vchSecret;
 403     bool fGood = vchSecret.SetString(strPrivkey);
 404     if (!fGood)
 405         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid private key");
 406     CKey key = vchSecret.GetKey();
 407     if (!key.IsValid())
 408         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Private key outside allowed range");
 409
 410     CHashWriter ss(SER_GETHASH, 0);
 411     ss << strMessageMagic;
 412     ss << strMessage;
 413
 414     std::vector<unsigned char> vchSig;
 415     if (!key.SignCompact(ss.GetHash(), vchSig))
 416         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Sign failed");
 417
 418     return EncodeBase64(vchSig.data(), vchSig.size());
 419 }
 420
 421 UniValue setmocktime(const JSONRPCRequest& request)
 422 {
 423     if (request.fHelp || request.params.size() != 1)
 424         throw std::runtime_error(
 425             "setmocktime timestamp\n"
 426             "\nSet the local time to given timestamp (-regtest only)\n"
 427             "\nArguments:\n"
 428             "1. timestamp  (integer, required) Unix seconds-since-epoch timestamp\n"
 429             "   Pass 0 to go back to using the system time."
 430         );
 431
 432     if (!Params().MineBlocksOnDemand())
 433         throw std::runtime_error("setmocktime for regression testing (-regtest mode) only");
 434
 435     // For now, don't change mocktime if we're in the middle of validation, as
 436     // this could have an effect on mempool time-based eviction, as well as
 437     // IsCurrentForFeeEstimation() and IsInitialBlockDownload().
 438     // TODO: figure out the right way to synchronize around mocktime, and
 439     // ensure all call sites of GetTime() are accessing this safely.
 440     LOCK(cs_main);
 441
 442     RPCTypeCheck(request.params, {UniValue::VNUM});
 443     SetMockTime(request.params[0].get_int64());
 444
 445     return NullUniValue;
 446 }
 447
 448 static UniValue RPCLockedMemoryInfo()
 449 {
 450     LockedPool::Stats stats = LockedPoolManager::Instance().stats();
 451     UniValue obj(UniValue::VOBJ);
 452     obj.push_back(Pair("used", uint64_t(stats.used)));
 453     obj.push_back(Pair("free", uint64_t(stats.free)));
 454     obj.push_back(Pair("total", uint64_t(stats.total)));
 455     obj.push_back(Pair("locked", uint64_t(stats.locked)));
 456     obj.push_back(Pair("chunks_used", uint64_t(stats.chunks_used)));
 457     obj.push_back(Pair("chunks_free", uint64_t(stats.chunks_free)));
 458     return obj;
 459 }
 460
 461 #ifdef HAVE_MALLOC_INFO
 462 static std::string RPCMallocInfo()
 463 {
 464     char *ptr = nullptr;
 465     size_t size = 0;
 466     FILE *f = open_memstream(&ptr, &size);
 467     if (f) {
 468         malloc_info(0, f);
 469         fclose(f);
 470         if (ptr) {
 471             std::string rv(ptr, size);
 472             free(ptr);
 473             return rv;
 474         }
 475     }
 476     return "";
 477 }
 478 #endif
 479
 480 UniValue getmemoryinfo(const JSONRPCRequest& request)
 481 {
 482     /* Please, avoid using the word "pool" here in the RPC interface or help,
 483      * as users will undoubtedly confuse it with the other "memory pool"
 484      */
 485     if (request.fHelp || request.params.size() > 1)
 486         throw std::runtime_error(
 487             "getmemoryinfo (\"mode\")\n"
 488             "Returns an object containing information about memory usage.\n"
 489             "Arguments:\n"
 490             "1. \"mode\" determines what kind of information is returned. This argument is optional, the default mode is \"stats\".\n"
 491             "  - \"stats\" returns general statistics about memory usage in the daemon.\n"
 492             "  - \"mallocinfo\" returns an XML string describing low-level heap state (only available if compiled with glibc 2.10+).\n"
 493             "\nResult (mode \"stats\"):\n"
 494             "{\n"
 495             "  \"locked\": {               (json object) Information about locked memory manager\n"
 496             "    \"used\": xxxxx,          (numeric) Number of bytes used\n"
 497             "    \"free\": xxxxx,          (numeric) Number of bytes available in current arenas\n"
 498             "    \"total\": xxxxxxx,       (numeric) Total number of bytes managed\n"
 499             "    \"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"
 500             "    \"chunks_used\": xxxxx,   (numeric) Number allocated chunks\n"
 501             "    \"chunks_free\": xxxxx,   (numeric) Number unused chunks\n"
 502             "  }\n"
 503             "}\n"
 504             "\nResult (mode \"mallocinfo\"):\n"
 505             "\"<malloc version=\"1\">...\"\n"
 506             "\nExamples:\n"
 507             + HelpExampleCli("getmemoryinfo", "")
 508             + HelpExampleRpc("getmemoryinfo", "")
 509         );
 510
 511     std::string mode = request.params[0].isNull() ? "stats" : request.params[0].get_str();
 512     if (mode == "stats") {
 513         UniValue obj(UniValue::VOBJ);
 514         obj.push_back(Pair("locked", RPCLockedMemoryInfo()));
 515         return obj;
 516     } else if (mode == "mallocinfo") {
 517 #ifdef HAVE_MALLOC_INFO
 518         return RPCMallocInfo();
 519 #else
 520         throw JSONRPCError(RPC_INVALID_PARAMETER, "mallocinfo is only available when compiled with glibc 2.10+");
 521 #endif
 522     } else {
 523         throw JSONRPCError(RPC_INVALID_PARAMETER, "unknown mode " + mode);
 524     }
 525 }
 526
 527 uint32_t getCategoryMask(UniValue cats) {
 528     cats = cats.get_array();
 529     uint32_t mask = 0;
 530     for (unsigned int i = 0; i < cats.size(); ++i) {
 531         uint32_t flag = 0;
 532         std::string cat = cats[i].get_str();
 533         if (!GetLogCategory(&flag, &cat)) {
 534             throw JSONRPCError(RPC_INVALID_PARAMETER, "unknown logging category " + cat);
 535         }
 536         mask |= flag;
 537     }
 538     return mask;
 539 }
 540
 541 UniValue logging(const JSONRPCRequest& request)
 542 {
 543     if (request.fHelp || request.params.size() > 2) {
 544         throw std::runtime_error(
 545             "logging [include,...] <exclude>\n"
 546             "Gets and sets the logging configuration.\n"
 547             "When called without an argument, returns the list of categories that are currently being debug logged.\n"
 548             "When called with arguments, adds or removes categories from debug logging.\n"
 549             "The valid logging categories are: " + ListLogCategories() + "\n"
 550             "libevent logging is configured on startup and cannot be modified by this RPC during runtime."
 551             "Arguments:\n"
 552             "1. \"include\" (array of strings) add debug logging for these categories.\n"
 553             "2. \"exclude\" (array of strings) remove debug logging for these categories.\n"
 554             "\nResult: <categories>  (string): a list of the logging categories that are active.\n"
 555             "\nExamples:\n"
 556             + HelpExampleCli("logging", "\"[\\\"all\\\"]\" \"[\\\"http\\\"]\"")
 557             + HelpExampleRpc("logging", "[\"all\"], \"[libevent]\"")
 558         );
 559     }
 560
 561     uint32_t originalLogCategories = logCategories;
 562     if (request.params[0].isArray()) {
 563         logCategories |= getCategoryMask(request.params[0]);
 564     }
 565
 566     if (request.params[1].isArray()) {
 567         logCategories &= ~getCategoryMask(request.params[1]);
 568     }
 569
 570     // Update libevent logging if BCLog::LIBEVENT has changed.
 571     // If the library version doesn't allow it, UpdateHTTPServerLogging() returns false,
 572     // in which case we should clear the BCLog::LIBEVENT flag.
 573     // Throw an error if the user has explicitly asked to change only the libevent
 574     // flag and it failed.
 575     uint32_t changedLogCategories = originalLogCategories ^ logCategories;
 576     if (changedLogCategories & BCLog::LIBEVENT) {
 577         if (!UpdateHTTPServerLogging(logCategories & BCLog::LIBEVENT)) {
 578             logCategories &= ~BCLog::LIBEVENT;
 579             if (changedLogCategories == BCLog::LIBEVENT) {
 580             throw JSONRPCError(RPC_INVALID_PARAMETER, "libevent logging cannot be updated when using libevent before v2.1.1.");
 581             }
 582         }
 583     }
 584
 585     UniValue result(UniValue::VOBJ);
 586     std::vector<CLogCategoryActive> vLogCatActive = ListActiveLogCategories();
 587     for (const auto& logCatActive : vLogCatActive) {
 588         result.pushKV(logCatActive.category, logCatActive.active);
 589     }
 590
 591     return result;
 592 }
 593
 594 UniValue echo(const JSONRPCRequest& request)
 595 {
 596     if (request.fHelp)
 597         throw std::runtime_error(
 598             "echo|echojson \"message\" ...\n"
 599             "\nSimply echo back the input arguments. This command is for testing.\n"
 600             "\nThe difference between echo and echojson is that echojson has argument conversion enabled in the client-side table in"
 601             "bitcoin-cli and the GUI. There is no server-side difference."
 602         );
 603
 604     return request.params;
 605 }
 606
 607 static const CRPCCommand commands[] =
 608 { //  category              name                      actor (function)         argNames
 609   //  --------------------- ------------------------  -----------------------  ----------
 610     { "control",            "getmemoryinfo",          &getmemoryinfo,          {"mode"} },
 611     { "control",            "logging",                &logging,                {"include", "exclude"}},
 612     { "util",               "validateaddress",        &validateaddress,        {"address"} }, /* uses wallet if enabled */
 613     { "util",               "createmultisig",         &createmultisig,         {"nrequired","keys"} },
 614     { "util",               "verifymessage",          &verifymessage,          {"address","signature","message"} },
 615     { "util",               "signmessagewithprivkey", &signmessagewithprivkey, {"privkey","message"} },
 616
 617     /* Not shown in help */
 618     { "hidden",             "setmocktime",            &setmocktime,            {"timestamp"}},
 619     { "hidden",             "echo",                   &echo,                   {"arg0","arg1","arg2","arg3","arg4","arg5","arg6","arg7","arg8","arg9"}},
 620     { "hidden",             "echojson",               &echo,                   {"arg0","arg1","arg2","arg3","arg4","arg5","arg6","arg7","arg8","arg9"}},
 621 };
 622
 623 void RegisterMiscRPCCommands(CRPCTable &t)
 624 {
 625     for (unsigned int vcidx = 0; vcidx < ARRAYLEN(commands); vcidx++)
 626         t.appendCommand(commands[vcidx].name, &commands[vcidx]);
 627 }