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::pair<uint256, uint32_t> solution;
 139         if (ScanMidstateForward(ctx, nBits, tx.nTime, tx.vout[nOut].nValue, interval, solution))
 140         {
 141             Object r;
 142             r.push_back(Pair("hash", solution.first.GetHex()));
 143             r.push_back(Pair("time", DateTimeStrFormat(solution.second)));
 144
 145             return r;
 146         }
 147     }
 148     else
 149         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "No information available about transaction");
 150
 151     return Value::null;
 152 }
 153
 154 Value getworkex(const Array& params, bool fHelp)
 155 {
 156     if (fHelp || params.size() > 2)
 157         throw runtime_error(
 158             "getworkex [data, coinbase]\n"
 159             "If [data, coinbase] is not specified, returns extended work data.\n"
 160         );
 161
 162     if (vNodes.empty())
 163         throw JSONRPCError(-9, "NovaCoin is not connected!");
 164
 165     if (IsInitialBlockDownload())
 166         throw JSONRPCError(-10, "NovaCoin is downloading blocks...");
 167
 168     typedef map<uint256, pair<CBlock*, CScript> > mapNewBlock_t;
 169     static mapNewBlock_t mapNewBlock;
 170     static vector<CBlock*> vNewBlock;
 171     static CReserveKey reservekey(pwalletMain);
 172
 173     if (params.size() == 0)
 174     {
 175         // Update block
 176         static unsigned int nTransactionsUpdatedLast;
 177         static CBlockIndex* pindexPrev;
 178         static int64_t nStart;
 179         static CBlock* pblock;
 180         if (pindexPrev != pindexBest ||
 181             (nTransactionsUpdated != nTransactionsUpdatedLast && GetTime() - nStart > 60))
 182         {
 183             if (pindexPrev != pindexBest)
 184             {
 185                 // Deallocate old blocks since they're obsolete now
 186                 mapNewBlock.clear();
 187                 BOOST_FOREACH(CBlock* pblock, vNewBlock)
 188                     delete pblock;
 189                 vNewBlock.clear();
 190             }
 191             nTransactionsUpdatedLast = nTransactionsUpdated;
 192             pindexPrev = pindexBest;
 193             nStart = GetTime();
 194
 195             // Create new block
 196             pblock = CreateNewBlock(pwalletMain);
 197             if (!pblock)
 198                 throw JSONRPCError(-7, "Out of memory");
 199             vNewBlock.push_back(pblock);
 200         }
 201
 202         // Update nTime
 203         pblock->nTime = max(pindexPrev->GetMedianTimePast()+1, GetAdjustedTime());
 204         pblock->nNonce = 0;
 205
 206         // Update nExtraNonce
 207         static unsigned int nExtraNonce = 0;
 208         IncrementExtraNonce(pblock, pindexPrev, nExtraNonce);
 209
 210         // Save
 211         mapNewBlock[pblock->hashMerkleRoot] = make_pair(pblock, pblock->vtx[0].vin[0].scriptSig);
 212
 213         // Prebuild hash buffers
 214         char pmidstate[32];
 215         char pdata[128];
 216         char phash1[64];
 217         FormatHashBuffers(pblock, pmidstate, pdata, phash1);
 218
 219         uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
 220
 221         CTransaction coinbaseTx = pblock->vtx[0];
 222         std::vector<uint256> merkle = pblock->GetMerkleBranch(0);
 223
 224         Object result;
 225         result.push_back(Pair("data",     HexStr(BEGIN(pdata), END(pdata))));
 226         result.push_back(Pair("target",   HexStr(BEGIN(hashTarget), END(hashTarget))));
 227
 228         CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
 229         ssTx << coinbaseTx;
 230         result.push_back(Pair("coinbase", HexStr(ssTx.begin(), ssTx.end())));
 231
 232         Array merkle_arr;
 233
 234         BOOST_FOREACH(uint256 merkleh, merkle) {
 235             merkle_arr.push_back(HexStr(BEGIN(merkleh), END(merkleh)));
 236         }
 237
 238         result.push_back(Pair("merkle", merkle_arr));
 239
 240
 241         return result;
 242     }
 243     else
 244     {
 245         // Parse parameters
 246         vector<unsigned char> vchData = ParseHex(params[0].get_str());
 247         vector<unsigned char> coinbase;
 248
 249         if(params.size() == 2)
 250             coinbase = ParseHex(params[1].get_str());
 251
 252         if (vchData.size() != 128)
 253             throw JSONRPCError(-8, "Invalid parameter");
 254
 255         CBlock* pdata = (CBlock*)&vchData[0];
 256
 257         // Byte reverse
 258         for (int i = 0; i < 128/4; i++)
 259             ((unsigned int*)pdata)[i] = ByteReverse(((unsigned int*)pdata)[i]);
 260
 261         // Get saved block
 262         if (!mapNewBlock.count(pdata->hashMerkleRoot))
 263             return false;
 264         CBlock* pblock = mapNewBlock[pdata->hashMerkleRoot].first;
 265
 266         pblock->nTime = pdata->nTime;
 267         pblock->nNonce = pdata->nNonce;
 268
 269         if(coinbase.size() == 0)
 270             pblock->vtx[0].vin[0].scriptSig = mapNewBlock[pdata->hashMerkleRoot].second;
 271         else
 272             CDataStream(coinbase, SER_NETWORK, PROTOCOL_VERSION) >> pblock->vtx[0]; // FIXME - HACK!
 273
 274         pblock->hashMerkleRoot = pblock->BuildMerkleTree();
 275
 276         return CheckWork(pblock, *pwalletMain, reservekey);
 277     }
 278 }
 279
 280
 281 Value getwork(const Array& params, bool fHelp)
 282 {
 283     if (fHelp || params.size() > 1)
 284         throw runtime_error(
 285             "getwork [data]\n"
 286             "If [data] is not specified, returns formatted hash data to work on:\n"
 287             "  \"midstate\" : precomputed hash state after hashing the first half of the data (DEPRECATED)\n" // deprecated
 288             "  \"data\" : block data\n"
 289             "  \"hash1\" : formatted hash buffer for second hash (DEPRECATED)\n" // deprecated
 290             "  \"target\" : little endian hash target\n"
 291             "If [data] is specified, tries to solve the block and returns true if it was successful.");
 292
 293     if (vNodes.empty())
 294         throw JSONRPCError(RPC_CLIENT_NOT_CONNECTED, "NovaCoin is not connected!");
 295
 296     if (IsInitialBlockDownload())
 297         throw JSONRPCError(RPC_CLIENT_IN_INITIAL_DOWNLOAD, "NovaCoin is downloading blocks...");
 298
 299     typedef map<uint256, pair<CBlock*, CScript> > mapNewBlock_t;
 300     static mapNewBlock_t mapNewBlock;    // FIXME: thread safety
 301     static vector<CBlock*> vNewBlock;
 302     static CReserveKey reservekey(pwalletMain);
 303
 304     if (params.size() == 0)
 305     {
 306         // Update block
 307         static unsigned int nTransactionsUpdatedLast;
 308         static CBlockIndex* pindexPrev;
 309         static int64_t nStart;
 310         static CBlock* pblock;
 311         if (pindexPrev != pindexBest ||
 312             (nTransactionsUpdated != nTransactionsUpdatedLast && GetTime() - nStart > 60))
 313         {
 314             if (pindexPrev != pindexBest)
 315             {
 316                 // Deallocate old blocks since they're obsolete now
 317                 mapNewBlock.clear();
 318                 BOOST_FOREACH(CBlock* pblock, vNewBlock)
 319                     delete pblock;
 320                 vNewBlock.clear();
 321             }
 322
 323             // Clear pindexPrev so future getworks make a new block, despite any failures from here on
 324             pindexPrev = NULL;
 325
 326             // Store the pindexBest used before CreateNewBlock, to avoid races
 327             nTransactionsUpdatedLast = nTransactionsUpdated;
 328             CBlockIndex* pindexPrevNew = pindexBest;
 329             nStart = GetTime();
 330
 331             // Create new block
 332             pblock = CreateNewBlock(pwalletMain);
 333             if (!pblock)
 334                 throw JSONRPCError(RPC_OUT_OF_MEMORY, "Out of memory");
 335             vNewBlock.push_back(pblock);
 336
 337             // Need to update only after we know CreateNewBlock succeeded
 338             pindexPrev = pindexPrevNew;
 339         }
 340
 341         // Update nTime
 342         pblock->UpdateTime(pindexPrev);
 343         pblock->nNonce = 0;
 344
 345         // Update nExtraNonce
 346         static unsigned int nExtraNonce = 0;
 347         IncrementExtraNonce(pblock, pindexPrev, nExtraNonce);
 348
 349         // Save
 350         mapNewBlock[pblock->hashMerkleRoot] = make_pair(pblock, pblock->vtx[0].vin[0].scriptSig);
 351
 352         // Pre-build hash buffers
 353         char pmidstate[32];
 354         char pdata[128];
 355         char phash1[64];
 356         FormatHashBuffers(pblock, pmidstate, pdata, phash1);
 357
 358         uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
 359
 360         Object result;
 361         result.push_back(Pair("midstate", HexStr(BEGIN(pmidstate), END(pmidstate)))); // deprecated
 362         result.push_back(Pair("data",     HexStr(BEGIN(pdata), END(pdata))));
 363         result.push_back(Pair("hash1",    HexStr(BEGIN(phash1), END(phash1)))); // deprecated
 364         result.push_back(Pair("target",   HexStr(BEGIN(hashTarget), END(hashTarget))));
 365         return result;
 366     }
 367     else
 368     {
 369         // Parse parameters
 370         vector<unsigned char> vchData = ParseHex(params[0].get_str());
 371         if (vchData.size() != 128)
 372             throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter");
 373         CBlock* pdata = (CBlock*)&vchData[0];
 374
 375         // Byte reverse
 376         for (int i = 0; i < 128/4; i++)
 377             ((unsigned int*)pdata)[i] = ByteReverse(((unsigned int*)pdata)[i]);
 378
 379         // Get saved block
 380         if (!mapNewBlock.count(pdata->hashMerkleRoot))
 381             return false;
 382         CBlock* pblock = mapNewBlock[pdata->hashMerkleRoot].first;
 383
 384         pblock->nTime = pdata->nTime;
 385         pblock->nNonce = pdata->nNonce;
 386         pblock->vtx[0].vin[0].scriptSig = mapNewBlock[pdata->hashMerkleRoot].second;
 387         pblock->hashMerkleRoot = pblock->BuildMerkleTree();
 388
 389         return CheckWork(pblock, *pwalletMain, reservekey);
 390     }
 391 }
 392
 393
 394 Value getblocktemplate(const Array& params, bool fHelp)
 395 {
 396     if (fHelp || params.size() > 1)
 397         throw runtime_error(
 398             "getblocktemplate [params]\n"
 399             "Returns data needed to construct a block to work on:\n"
 400             "  \"version\" : block version\n"
 401             "  \"previousblockhash\" : hash of current highest block\n"
 402             "  \"transactions\" : contents of non-coinbase transactions that should be included in the next block\n"
 403             "  \"coinbaseaux\" : data that should be included in coinbase\n"
 404             "  \"coinbasevalue\" : maximum allowable input to coinbase transaction, including the generation award and transaction fees\n"
 405             "  \"target\" : hash target\n"
 406             "  \"mintime\" : minimum timestamp appropriate for next block\n"
 407             "  \"curtime\" : current timestamp\n"
 408             "  \"mutable\" : list of ways the block template may be changed\n"
 409             "  \"noncerange\" : range of valid nonces\n"
 410             "  \"sigoplimit\" : limit of sigops in blocks\n"
 411             "  \"sizelimit\" : limit of block size\n"
 412             "  \"bits\" : compressed target of next block\n"
 413             "  \"height\" : height of the next block\n"
 414             "See https://en.bitcoin.it/wiki/BIP_0022 for full specification.");
 415
 416     std::string strMode = "template";
 417     if (params.size() > 0)
 418     {
 419         const Object& oparam = params[0].get_obj();
 420         const Value& modeval = find_value(oparam, "mode");
 421         if (modeval.type() == str_type)
 422             strMode = modeval.get_str();
 423         else if (modeval.type() == null_type)
 424         {
 425             /* Do nothing */
 426         }
 427         else
 428             throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid mode");
 429     }
 430
 431     if (strMode != "template")
 432         throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid mode");
 433
 434     if (vNodes.empty())
 435         throw JSONRPCError(RPC_CLIENT_NOT_CONNECTED, "NovaCoin is not connected!");
 436
 437     if (IsInitialBlockDownload())
 438         throw JSONRPCError(RPC_CLIENT_IN_INITIAL_DOWNLOAD, "NovaCoin is downloading blocks...");
 439
 440     static CReserveKey reservekey(pwalletMain);
 441
 442     // Update block
 443     static unsigned int nTransactionsUpdatedLast;
 444     static CBlockIndex* pindexPrev;
 445     static int64_t nStart;
 446     static CBlock* pblock;
 447     if (pindexPrev != pindexBest ||
 448         (nTransactionsUpdated != nTransactionsUpdatedLast && GetTime() - nStart > 5))
 449     {
 450         // Clear pindexPrev so future calls make a new block, despite any failures from here on
 451         pindexPrev = NULL;
 452
 453         // Store the pindexBest used before CreateNewBlock, to avoid races
 454         nTransactionsUpdatedLast = nTransactionsUpdated;
 455         CBlockIndex* pindexPrevNew = pindexBest;
 456         nStart = GetTime();
 457
 458         // Create new block
 459         if(pblock)
 460         {
 461             delete pblock;
 462             pblock = NULL;
 463         }
 464         pblock = CreateNewBlock(pwalletMain);
 465         if (!pblock)
 466             throw JSONRPCError(RPC_OUT_OF_MEMORY, "Out of memory");
 467
 468         // Need to update only after we know CreateNewBlock succeeded
 469         pindexPrev = pindexPrevNew;
 470     }
 471
 472     // Update nTime
 473     pblock->UpdateTime(pindexPrev);
 474     pblock->nNonce = 0;
 475
 476     Array transactions;
 477     map<uint256, int64_t> setTxIndex;
 478     int i = 0;
 479     CTxDB txdb("r");
 480     BOOST_FOREACH (CTransaction& tx, pblock->vtx)
 481     {
 482         uint256 txHash = tx.GetHash();
 483         setTxIndex[txHash] = i++;
 484
 485         if (tx.IsCoinBase() || tx.IsCoinStake())
 486             continue;
 487
 488         Object entry;
 489
 490         CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
 491         ssTx << tx;
 492         entry.push_back(Pair("data", HexStr(ssTx.begin(), ssTx.end())));
 493
 494         entry.push_back(Pair("hash", txHash.GetHex()));
 495
 496         MapPrevTx mapInputs;
 497         map<uint256, CTxIndex> mapUnused;
 498         bool fInvalid = false;
 499         if (tx.FetchInputs(txdb, mapUnused, false, false, mapInputs, fInvalid))
 500         {
 501             entry.push_back(Pair("fee", (int64_t)(tx.GetValueIn(mapInputs) - tx.GetValueOut())));
 502
 503             Array deps;
 504             BOOST_FOREACH (MapPrevTx::value_type& inp, mapInputs)
 505             {
 506                 if (setTxIndex.count(inp.first))
 507                     deps.push_back(setTxIndex[inp.first]);
 508             }
 509             entry.push_back(Pair("depends", deps));
 510
 511             int64_t nSigOps = tx.GetLegacySigOpCount();
 512             nSigOps += tx.GetP2SHSigOpCount(mapInputs);
 513             entry.push_back(Pair("sigops", nSigOps));
 514         }
 515
 516         transactions.push_back(entry);
 517     }
 518
 519     Object aux;
 520     aux.push_back(Pair("flags", HexStr(COINBASE_FLAGS.begin(), COINBASE_FLAGS.end())));
 521
 522     uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
 523
 524     static Array aMutable;
 525     if (aMutable.empty())
 526     {
 527         aMutable.push_back("time");
 528         aMutable.push_back("transactions");
 529         aMutable.push_back("prevblock");
 530     }
 531
 532     Object result;
 533     result.push_back(Pair("version", pblock->nVersion));
 534     result.push_back(Pair("previousblockhash", pblock->hashPrevBlock.GetHex()));
 535     result.push_back(Pair("transactions", transactions));
 536     result.push_back(Pair("coinbaseaux", aux));
 537     result.push_back(Pair("coinbasevalue", (int64_t)pblock->vtx[0].vout[0].nValue));
 538     result.push_back(Pair("target", hashTarget.GetHex()));
 539     result.push_back(Pair("mintime", (int64_t)pindexPrev->GetMedianTimePast()+1));
 540     result.push_back(Pair("mutable", aMutable));
 541     result.push_back(Pair("noncerange", "00000000ffffffff"));
 542     result.push_back(Pair("sigoplimit", (int64_t)MAX_BLOCK_SIGOPS));
 543     result.push_back(Pair("sizelimit", (int64_t)MAX_BLOCK_SIZE));
 544     result.push_back(Pair("curtime", (int64_t)pblock->nTime));
 545     result.push_back(Pair("bits", HexBits(pblock->nBits)));
 546     result.push_back(Pair("height", (int64_t)(pindexPrev->nHeight+1)));
 547
 548     return result;
 549 }
 550
 551 Value submitblock(const Array& params, bool fHelp)
 552 {
 553     if (fHelp || params.size() < 1 || params.size() > 2)
 554         throw runtime_error(
 555             "submitblock <hex data> [optional-params-obj]\n"
 556             "[optional-params-obj] parameter is currently ignored.\n"
 557             "Attempts to submit new block to network.\n"
 558             "See https://en.bitcoin.it/wiki/BIP_0022 for full specification.");
 559
 560     vector<unsigned char> blockData(ParseHex(params[0].get_str()));
 561     CDataStream ssBlock(blockData, SER_NETWORK, PROTOCOL_VERSION);
 562     CBlock block;
 563     try {
 564         ssBlock >> block;
 565     }
 566     catch (const std::exception&) {
 567         throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "Block decode failed");
 568     }
 569
 570     bool fAccepted = ProcessBlock(NULL, &block);
 571     if (!fAccepted)
 572         return "rejected";
 573
 574     return Value::null;
 575 }
 576