src/rpcmining.cpp

   1 // Copyright (c) 2010 Satoshi Nakamoto
   2 // Copyright (c) 2009-2012 The Bitcoin developers
   3 // Distributed under the MIT/X11 software license, see the accompanying
   4 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   5
   6 #include "main.h"
   7 #include "db.h"
   8 #include "txdb.h"
   9 #include "init.h"
  10 #include "miner.h"
  11 #include "kernel.h"
  12 #include "bitcoinrpc.h"
  13
  14 using namespace json_spirit;
  15 using namespace std;
  16
  17 extern uint256 nPoWBase;
  18 extern uint64_t nStakeInputsMapSize;
  19
  20 Value getsubsidy(const Array& params, bool fHelp)
  21 {
  22     if (fHelp || params.size() > 1)
  23         throw runtime_error(
  24             "getsubsidy [nTarget]\n"
  25             "Returns proof-of-work subsidy value for the specified value of target.");
  26
  27     unsigned int nBits = 0;
  28
  29     if (params.size() != 0)
  30     {
  31         CBigNum bnTarget(uint256(params[0].get_str()));
  32         nBits = bnTarget.GetCompact();
  33     }
  34     else
  35     {
  36         nBits = GetNextTargetRequired(pindexBest, false);
  37     }
  38
  39     return (uint64_t)GetProofOfWorkReward(nBits);
  40 }
  41
  42 Value getmininginfo(const Array& params, bool fHelp)
  43 {
  44     if (fHelp || params.size() != 0)
  45         throw runtime_error(
  46             "getmininginfo\n"
  47             "Returns an object containing mining-related information.");
  48
  49     Object obj, diff, weight;
  50     obj.push_back(Pair("blocks",        (int)nBestHeight));
  51     obj.push_back(Pair("currentblocksize",(uint64_t)nLastBlockSize));
  52     obj.push_back(Pair("currentblocktx",(uint64_t)nLastBlockTx));
  53
  54     diff.push_back(Pair("proof-of-work",        GetDifficulty()));
  55     diff.push_back(Pair("proof-of-stake",       GetDifficulty(GetLastBlockIndex(pindexBest, true))));
  56     diff.push_back(Pair("search-interval",      (int)nLastCoinStakeSearchInterval));
  57     obj.push_back(Pair("difficulty",    diff));
  58
  59     obj.push_back(Pair("blockvalue",    (uint64_t)GetProofOfWorkReward(GetLastBlockIndex(pindexBest, false)->nBits)));
  60     obj.push_back(Pair("netmhashps",    GetPoWMHashPS()));
  61     obj.push_back(Pair("netstakeweight",GetPoSKernelPS()));
  62     obj.push_back(Pair("errors",        GetWarnings("statusbar")));
  63     obj.push_back(Pair("pooledtx",      (uint64_t)mempool.size()));
  64
  65     obj.push_back(Pair("stakeinputs",   (uint64_t)nStakeInputsMapSize));
  66     obj.push_back(Pair("stakeinterest", GetProofOfStakeReward(0, GetLastBlockIndex(pindexBest, true)->nBits, GetLastBlockIndex(pindexBest, true)->nTime, true)));
  67
  68     obj.push_back(Pair("testnet",       fTestNet));
  69     return obj;
  70 }
  71
  72 Value scaninput(const Array& params, bool fHelp)
  73 {
  74     if (fHelp || params.size() > 4 || params.size() < 2)
  75         throw runtime_error(
  76             "scaninput <txid> <nout> [difficulty] [days]\n"
  77             "Scan specified input for suitable kernel solutions.\n"
  78             "    [difficulty] - upper limit for difficulty, current difficulty by default;\n"
  79             "    [days] - time window, 365 days by default.\n"
  80         );
  81
  82
  83     uint256 hash;
  84     hash.SetHex(params[0].get_str());
  85
  86     uint32_t nOut = params[1].get_int(), nBits = GetNextTargetRequired(pindexBest, true), nDays = 365;
  87
  88     if (params.size() > 2)
  89     {
  90         CBigNum bnTarget(nPoWBase);
  91         bnTarget *= 1000;
  92         bnTarget /= (int) (params[2].get_real() * 1000);
  93         nBits = bnTarget.GetCompact();
  94     }
  95
  96     if (params.size() > 3)
  97     {
  98         nDays = params[3].get_int();
  99     }
 100
 101     CTransaction tx;
 102     uint256 hashBlock = 0;
 103     if (GetTransaction(hash, tx, hashBlock))
 104     {
 105         if (nOut > tx.vout.size())
 106             throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Incorrect output number");
 107
 108         if (hashBlock == 0)
 109             throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Unable to find transaction in the blockchain");
 110
 111         CTxDB txdb("r");
 112
 113         CBlock block;
 114         CTxIndex txindex;
 115
 116         // Load transaction index item
 117         if (!txdb.ReadTxIndex(tx.GetHash(), txindex))
 118             throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Unable to read block index item");
 119
 120         // Read block header
 121         if (!block.ReadFromDisk(txindex.pos.nFile, txindex.pos.nBlockPos, false))
 122             throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "CBlock::ReadFromDisk() failed");
 123
 124         uint64_t nStakeModifier = 0;
 125         if (!GetKernelStakeModifier(block.GetHash(), nStakeModifier))
 126             throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "No kernel stake modifier generated yet");
 127
 128         std::pair<uint32_t, uint32_t> interval;
 129         interval.first = GetTime();
 130         // Only count coins meeting min age requirement
 131         if (nStakeMinAge + block.nTime > interval.first)
 132             interval.first += (nStakeMinAge + block.nTime - interval.first);
 133         interval.second = interval.first + nDays * 86400;
 134
 135         SHA256_CTX ctx;
 136         GetKernelMidstate(nStakeModifier, block.nTime, txindex.pos.nTxPos - txindex.pos.nBlockPos, tx.nTime, nOut, ctx);
 137
 138         std::vector<std::pair<uint256, uint32_t> > solutions;
 139         if (ScanMidstateForward(ctx, nBits, tx.nTime, tx.vout[nOut].nValue, interval, solutions))
 140         {
 141             Array sols;
 142
 143             BOOST_FOREACH(const PAIRTYPE(uint256, uint32_t) solution, solutions)
 144             {
 145
 146                 Object r;
 147                 r.push_back(Pair("hash", solution.first.GetHex()));
 148                 r.push_back(Pair("time", DateTimeStrFormat(solution.second)));
 149
 150                 sols.push_back(r);
 151             }
 152
 153             return sols;
 154         }
 155     }
 156     else
 157         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "No information available about transaction");
 158
 159     return Value::null;
 160 }
 161
 162 Value getworkex(const Array& params, bool fHelp)
 163 {
 164     if (fHelp || params.size() > 2)
 165         throw runtime_error(
 166             "getworkex [data, coinbase]\n"
 167             "If [data, coinbase] is not specified, returns extended work data.\n"
 168         );
 169
 170     if (vNodes.empty())
 171         throw JSONRPCError(-9, "NovaCoin is not connected!");
 172
 173     if (IsInitialBlockDownload())
 174         throw JSONRPCError(-10, "NovaCoin is downloading blocks...");
 175
 176     typedef map<uint256, pair<CBlock*, CScript> > mapNewBlock_t;
 177     static mapNewBlock_t mapNewBlock;
 178     static vector<CBlock*> vNewBlock;
 179     static CReserveKey reservekey(pwalletMain);
 180
 181     if (params.size() == 0)
 182     {
 183         // Update block
 184         static unsigned int nTransactionsUpdatedLast;
 185         static CBlockIndex* pindexPrev;
 186         static int64_t nStart;
 187         static CBlock* pblock;
 188         if (pindexPrev != pindexBest ||
 189             (nTransactionsUpdated != nTransactionsUpdatedLast && GetTime() - nStart > 60))
 190         {
 191             if (pindexPrev != pindexBest)
 192             {
 193                 // Deallocate old blocks since they're obsolete now
 194                 mapNewBlock.clear();
 195                 BOOST_FOREACH(CBlock* pblock, vNewBlock)
 196                     delete pblock;
 197                 vNewBlock.clear();
 198             }
 199             nTransactionsUpdatedLast = nTransactionsUpdated;
 200             pindexPrev = pindexBest;
 201             nStart = GetTime();
 202
 203             // Create new block
 204             pblock = CreateNewBlock(pwalletMain);
 205             if (!pblock)
 206                 throw JSONRPCError(-7, "Out of memory");
 207             vNewBlock.push_back(pblock);
 208         }
 209
 210         // Update nTime
 211         pblock->nTime = max(pindexPrev->GetMedianTimePast()+1, GetAdjustedTime());
 212         pblock->nNonce = 0;
 213
 214         // Update nExtraNonce
 215         static unsigned int nExtraNonce = 0;
 216         IncrementExtraNonce(pblock, pindexPrev, nExtraNonce);
 217
 218         // Save
 219         mapNewBlock[pblock->hashMerkleRoot] = make_pair(pblock, pblock->vtx[0].vin[0].scriptSig);
 220
 221         // Prebuild hash buffers
 222         char pmidstate[32];
 223         char pdata[128];
 224         char phash1[64];
 225         FormatHashBuffers(pblock, pmidstate, pdata, phash1);
 226
 227         uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
 228
 229         CTransaction coinbaseTx = pblock->vtx[0];
 230         std::vector<uint256> merkle = pblock->GetMerkleBranch(0);
 231
 232         Object result;
 233         result.push_back(Pair("data",     HexStr(BEGIN(pdata), END(pdata))));
 234         result.push_back(Pair("target",   HexStr(BEGIN(hashTarget), END(hashTarget))));
 235
 236         CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
 237         ssTx << coinbaseTx;
 238         result.push_back(Pair("coinbase", HexStr(ssTx.begin(), ssTx.end())));
 239
 240         Array merkle_arr;
 241
 242         BOOST_FOREACH(uint256 merkleh, merkle) {
 243             merkle_arr.push_back(HexStr(BEGIN(merkleh), END(merkleh)));
 244         }
 245
 246         result.push_back(Pair("merkle", merkle_arr));
 247
 248
 249         return result;
 250     }
 251     else
 252     {
 253         // Parse parameters
 254         vector<unsigned char> vchData = ParseHex(params[0].get_str());
 255         vector<unsigned char> coinbase;
 256
 257         if(params.size() == 2)
 258             coinbase = ParseHex(params[1].get_str());
 259
 260         if (vchData.size() != 128)
 261             throw JSONRPCError(-8, "Invalid parameter");
 262
 263         CBlock* pdata = (CBlock*)&vchData[0];
 264
 265         // Byte reverse
 266         for (int i = 0; i < 128/4; i++)
 267             ((unsigned int*)pdata)[i] = ByteReverse(((unsigned int*)pdata)[i]);
 268
 269         // Get saved block
 270         if (!mapNewBlock.count(pdata->hashMerkleRoot))
 271             return false;
 272         CBlock* pblock = mapNewBlock[pdata->hashMerkleRoot].first;
 273
 274         pblock->nTime = pdata->nTime;
 275         pblock->nNonce = pdata->nNonce;
 276
 277         if(coinbase.size() == 0)
 278             pblock->vtx[0].vin[0].scriptSig = mapNewBlock[pdata->hashMerkleRoot].second;
 279         else
 280             CDataStream(coinbase, SER_NETWORK, PROTOCOL_VERSION) >> pblock->vtx[0]; // FIXME - HACK!
 281
 282         pblock->hashMerkleRoot = pblock->BuildMerkleTree();
 283
 284         return CheckWork(pblock, *pwalletMain, reservekey);
 285     }
 286 }
 287
 288
 289 Value getwork(const Array& params, bool fHelp)
 290 {
 291     if (fHelp || params.size() > 1)
 292         throw runtime_error(
 293             "getwork [data]\n"
 294             "If [data] is not specified, returns formatted hash data to work on:\n"
 295             "  \"midstate\" : precomputed hash state after hashing the first half of the data (DEPRECATED)\n" // deprecated
 296             "  \"data\" : block data\n"
 297             "  \"hash1\" : formatted hash buffer for second hash (DEPRECATED)\n" // deprecated
 298             "  \"target\" : little endian hash target\n"
 299             "If [data] is specified, tries to solve the block and returns true if it was successful.");
 300
 301     if (vNodes.empty())
 302         throw JSONRPCError(RPC_CLIENT_NOT_CONNECTED, "NovaCoin is not connected!");
 303
 304     if (IsInitialBlockDownload())
 305         throw JSONRPCError(RPC_CLIENT_IN_INITIAL_DOWNLOAD, "NovaCoin is downloading blocks...");
 306
 307     typedef map<uint256, pair<CBlock*, CScript> > mapNewBlock_t;
 308     static mapNewBlock_t mapNewBlock;    // FIXME: thread safety
 309     static vector<CBlock*> vNewBlock;
 310     static CReserveKey reservekey(pwalletMain);
 311
 312     if (params.size() == 0)
 313     {
 314         // Update block
 315         static unsigned int nTransactionsUpdatedLast;
 316         static CBlockIndex* pindexPrev;
 317         static int64_t nStart;
 318         static CBlock* pblock;
 319         if (pindexPrev != pindexBest ||
 320             (nTransactionsUpdated != nTransactionsUpdatedLast && GetTime() - nStart > 60))
 321         {
 322             if (pindexPrev != pindexBest)
 323             {
 324                 // Deallocate old blocks since they're obsolete now
 325                 mapNewBlock.clear();
 326                 BOOST_FOREACH(CBlock* pblock, vNewBlock)
 327                     delete pblock;
 328                 vNewBlock.clear();
 329             }
 330
 331             // Clear pindexPrev so future getworks make a new block, despite any failures from here on
 332             pindexPrev = NULL;
 333
 334             // Store the pindexBest used before CreateNewBlock, to avoid races
 335             nTransactionsUpdatedLast = nTransactionsUpdated;
 336             CBlockIndex* pindexPrevNew = pindexBest;
 337             nStart = GetTime();
 338
 339             // Create new block
 340             pblock = CreateNewBlock(pwalletMain);
 341             if (!pblock)
 342                 throw JSONRPCError(RPC_OUT_OF_MEMORY, "Out of memory");
 343             vNewBlock.push_back(pblock);
 344
 345             // Need to update only after we know CreateNewBlock succeeded
 346             pindexPrev = pindexPrevNew;
 347         }
 348
 349         // Update nTime
 350         pblock->UpdateTime(pindexPrev);
 351         pblock->nNonce = 0;
 352
 353         // Update nExtraNonce
 354         static unsigned int nExtraNonce = 0;
 355         IncrementExtraNonce(pblock, pindexPrev, nExtraNonce);
 356
 357         // Save
 358         mapNewBlock[pblock->hashMerkleRoot] = make_pair(pblock, pblock->vtx[0].vin[0].scriptSig);
 359
 360         // Pre-build hash buffers
 361         char pmidstate[32];
 362         char pdata[128];
 363         char phash1[64];
 364         FormatHashBuffers(pblock, pmidstate, pdata, phash1);
 365
 366         uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
 367
 368         Object result;
 369         result.push_back(Pair("midstate", HexStr(BEGIN(pmidstate), END(pmidstate)))); // deprecated
 370         result.push_back(Pair("data",     HexStr(BEGIN(pdata), END(pdata))));
 371         result.push_back(Pair("hash1",    HexStr(BEGIN(phash1), END(phash1)))); // deprecated
 372         result.push_back(Pair("target",   HexStr(BEGIN(hashTarget), END(hashTarget))));
 373         return result;
 374     }
 375     else
 376     {
 377         // Parse parameters
 378         vector<unsigned char> vchData = ParseHex(params[0].get_str());
 379         if (vchData.size() != 128)
 380             throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter");
 381         CBlock* pdata = (CBlock*)&vchData[0];
 382
 383         // Byte reverse
 384         for (int i = 0; i < 128/4; i++)
 385             ((unsigned int*)pdata)[i] = ByteReverse(((unsigned int*)pdata)[i]);
 386
 387         // Get saved block
 388         if (!mapNewBlock.count(pdata->hashMerkleRoot))
 389             return false;
 390         CBlock* pblock = mapNewBlock[pdata->hashMerkleRoot].first;
 391
 392         pblock->nTime = pdata->nTime;
 393         pblock->nNonce = pdata->nNonce;
 394         pblock->vtx[0].vin[0].scriptSig = mapNewBlock[pdata->hashMerkleRoot].second;
 395         pblock->hashMerkleRoot = pblock->BuildMerkleTree();
 396
 397         return CheckWork(pblock, *pwalletMain, reservekey);
 398     }
 399 }
 400
 401
 402 Value getblocktemplate(const Array& params, bool fHelp)
 403 {
 404     if (fHelp || params.size() > 1)
 405         throw runtime_error(
 406             "getblocktemplate [params]\n"
 407             "Returns data needed to construct a block to work on:\n"
 408             "  \"version\" : block version\n"
 409             "  \"previousblockhash\" : hash of current highest block\n"
 410             "  \"transactions\" : contents of non-coinbase transactions that should be included in the next block\n"
 411             "  \"coinbaseaux\" : data that should be included in coinbase\n"
 412             "  \"coinbasevalue\" : maximum allowable input to coinbase transaction, including the generation award and transaction fees\n"
 413             "  \"target\" : hash target\n"
 414             "  \"mintime\" : minimum timestamp appropriate for next block\n"
 415             "  \"curtime\" : current timestamp\n"
 416             "  \"mutable\" : list of ways the block template may be changed\n"
 417             "  \"noncerange\" : range of valid nonces\n"
 418             "  \"sigoplimit\" : limit of sigops in blocks\n"
 419             "  \"sizelimit\" : limit of block size\n"
 420             "  \"bits\" : compressed target of next block\n"
 421             "  \"height\" : height of the next block\n"
 422             "See https://en.bitcoin.it/wiki/BIP_0022 for full specification.");
 423
 424     std::string strMode = "template";
 425     if (params.size() > 0)
 426     {
 427         const Object& oparam = params[0].get_obj();
 428         const Value& modeval = find_value(oparam, "mode");
 429         if (modeval.type() == str_type)
 430             strMode = modeval.get_str();
 431         else if (modeval.type() == null_type)
 432         {
 433             /* Do nothing */
 434         }
 435         else
 436             throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid mode");
 437     }
 438
 439     if (strMode != "template")
 440         throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid mode");
 441
 442     if (vNodes.empty())
 443         throw JSONRPCError(RPC_CLIENT_NOT_CONNECTED, "NovaCoin is not connected!");
 444
 445     if (IsInitialBlockDownload())
 446         throw JSONRPCError(RPC_CLIENT_IN_INITIAL_DOWNLOAD, "NovaCoin is downloading blocks...");
 447
 448     static CReserveKey reservekey(pwalletMain);
 449
 450     // Update block
 451     static unsigned int nTransactionsUpdatedLast;
 452     static CBlockIndex* pindexPrev;
 453     static int64_t nStart;
 454     static CBlock* pblock;
 455     if (pindexPrev != pindexBest ||
 456         (nTransactionsUpdated != nTransactionsUpdatedLast && GetTime() - nStart > 5))
 457     {
 458         // Clear pindexPrev so future calls make a new block, despite any failures from here on
 459         pindexPrev = NULL;
 460
 461         // Store the pindexBest used before CreateNewBlock, to avoid races
 462         nTransactionsUpdatedLast = nTransactionsUpdated;
 463         CBlockIndex* pindexPrevNew = pindexBest;
 464         nStart = GetTime();
 465
 466         // Create new block
 467         if(pblock)
 468         {
 469             delete pblock;
 470             pblock = NULL;
 471         }
 472         pblock = CreateNewBlock(pwalletMain);
 473         if (!pblock)
 474             throw JSONRPCError(RPC_OUT_OF_MEMORY, "Out of memory");
 475
 476         // Need to update only after we know CreateNewBlock succeeded
 477         pindexPrev = pindexPrevNew;
 478     }
 479
 480     // Update nTime
 481     pblock->UpdateTime(pindexPrev);
 482     pblock->nNonce = 0;
 483
 484     Array transactions;
 485     map<uint256, int64_t> setTxIndex;
 486     int i = 0;
 487     CTxDB txdb("r");
 488     BOOST_FOREACH (CTransaction& tx, pblock->vtx)
 489     {
 490         uint256 txHash = tx.GetHash();
 491         setTxIndex[txHash] = i++;
 492
 493         if (tx.IsCoinBase() || tx.IsCoinStake())
 494             continue;
 495
 496         Object entry;
 497
 498         CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
 499         ssTx << tx;
 500         entry.push_back(Pair("data", HexStr(ssTx.begin(), ssTx.end())));
 501
 502         entry.push_back(Pair("hash", txHash.GetHex()));
 503
 504         MapPrevTx mapInputs;
 505         map<uint256, CTxIndex> mapUnused;
 506         bool fInvalid = false;
 507         if (tx.FetchInputs(txdb, mapUnused, false, false, mapInputs, fInvalid))
 508         {
 509             entry.push_back(Pair("fee", (int64_t)(tx.GetValueIn(mapInputs) - tx.GetValueOut())));
 510
 511             Array deps;
 512             BOOST_FOREACH (MapPrevTx::value_type& inp, mapInputs)
 513             {
 514                 if (setTxIndex.count(inp.first))
 515                     deps.push_back(setTxIndex[inp.first]);
 516             }
 517             entry.push_back(Pair("depends", deps));
 518
 519             int64_t nSigOps = tx.GetLegacySigOpCount();
 520             nSigOps += tx.GetP2SHSigOpCount(mapInputs);
 521             entry.push_back(Pair("sigops", nSigOps));
 522         }
 523
 524         transactions.push_back(entry);
 525     }
 526
 527     Object aux;
 528     aux.push_back(Pair("flags", HexStr(COINBASE_FLAGS.begin(), COINBASE_FLAGS.end())));
 529
 530     uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
 531
 532     static Array aMutable;
 533     if (aMutable.empty())
 534     {
 535         aMutable.push_back("time");
 536         aMutable.push_back("transactions");
 537         aMutable.push_back("prevblock");
 538     }
 539
 540     Object result;
 541     result.push_back(Pair("version", pblock->nVersion));
 542     result.push_back(Pair("previousblockhash", pblock->hashPrevBlock.GetHex()));
 543     result.push_back(Pair("transactions", transactions));
 544     result.push_back(Pair("coinbaseaux", aux));
 545     result.push_back(Pair("coinbasevalue", (int64_t)pblock->vtx[0].vout[0].nValue));
 546     result.push_back(Pair("target", hashTarget.GetHex()));
 547     result.push_back(Pair("mintime", (int64_t)pindexPrev->GetMedianTimePast()+1));
 548     result.push_back(Pair("mutable", aMutable));
 549     result.push_back(Pair("noncerange", "00000000ffffffff"));
 550     result.push_back(Pair("sigoplimit", (int64_t)MAX_BLOCK_SIGOPS));
 551     result.push_back(Pair("sizelimit", (int64_t)MAX_BLOCK_SIZE));
 552     result.push_back(Pair("curtime", (int64_t)pblock->nTime));
 553     result.push_back(Pair("bits", HexBits(pblock->nBits)));
 554     result.push_back(Pair("height", (int64_t)(pindexPrev->nHeight+1)));
 555
 556     return result;
 557 }
 558
 559 Value submitblock(const Array& params, bool fHelp)
 560 {
 561     if (fHelp || params.size() < 1 || params.size() > 2)
 562         throw runtime_error(
 563             "submitblock <hex data> [optional-params-obj]\n"
 564             "[optional-params-obj] parameter is currently ignored.\n"
 565             "Attempts to submit new block to network.\n"
 566             "See https://en.bitcoin.it/wiki/BIP_0022 for full specification.");
 567
 568     vector<unsigned char> blockData(ParseHex(params[0].get_str()));
 569     CDataStream ssBlock(blockData, SER_NETWORK, PROTOCOL_VERSION);
 570     CBlock block;
 571     try {
 572         ssBlock >> block;
 573     }
 574     catch (const std::exception&) {
 575         throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "Block decode failed");
 576     }
 577
 578     bool fAccepted = ProcessBlock(NULL, &block);
 579     if (!fAccepted)
 580         return "rejected";
 581
 582     return Value::null;
 583 }
 584