add getblocktemplate support

diff --git a/src/bitcoinrpc.cpp b/src/bitcoinrpc.cpp
index 0a53c7f..d626895 100644 (file)
--- a/src/bitcoinrpc.cpp
+++ b/src/bitcoinrpc.cpp
@@ -1909,7 +1909,6 @@ Value getwork(const Array& params, bool fHelp)
     }
 }
 
-
 Value getmemorypool(const Array& params, bool fHelp)
 {
     if (fHelp || params.size() > 1)
@@ -2001,6 +2000,191 @@ Value getmemorypool(const Array& params, bool fHelp)
     }
 }
 
+
+Value getblocktemplate(const Array& params, bool fHelp)
+{
+    if (fHelp || params.size() > 1)
+        throw runtime_error(
+            "getblocktemplate [params]\n"
+            "Returns data needed to construct a block to work on:\n"
+            "  \"version\" : block version\n"
+            "  \"previousblockhash\" : hash of current highest block\n"
+            "  \"transactions\" : contents of non-coinbase transactions that should be included in the next block\n"
+            "  \"coinbaseaux\" : data that should be included in coinbase\n"
+            "  \"coinbasevalue\" : maximum allowable input to coinbase transaction, including the generation award and transaction fees\n"
+            "  \"target\" : hash target\n"
+            "  \"mintime\" : minimum timestamp appropriate for next block\n"
+            "  \"curtime\" : current timestamp\n"
+            "  \"mutable\" : list of ways the block template may be changed\n"
+            "  \"noncerange\" : range of valid nonces\n"
+            "  \"sigoplimit\" : limit of sigops in blocks\n"
+            "  \"sizelimit\" : limit of block size\n"
+            "  \"bits\" : compressed target of next block\n"
+            "  \"height\" : height of the next block\n"
+            "See https://en.bitcoin.it/wiki/BIP_0022 for full specification.");
+
+    std::string strMode = "template";
+    if (params.size() > 0)
+    {
+        const Object& oparam = params[0].get_obj();
+        const Value& modeval = find_value(oparam, "mode");
+        if (modeval.type() == str_type)
+            strMode = modeval.get_str();
+        else
+            throw JSONRPCError(-8, "Invalid mode");
+    }
+
+    if (strMode != "template")
+        throw JSONRPCError(-8, "Invalid mode");
+
+    if (vNodes.empty())
+        throw JSONRPCError(-9, "NovaCoin is not connected!");
+
+    if (IsInitialBlockDownload())
+        throw JSONRPCError(-10, "NovaCoin is downloading blocks...");
+
+    static CReserveKey reservekey(pwalletMain);
+
+    // Update block
+    static unsigned int nTransactionsUpdatedLast;
+    static CBlockIndex* pindexPrev;
+    static int64 nStart;
+    static CBlock* pblock;
+    if (pindexPrev != pindexBest ||
+        (nTransactionsUpdated != nTransactionsUpdatedLast && GetTime() - nStart > 5))
+    {
+        // Clear pindexPrev so future calls make a new block, despite any failures from here on
+        pindexPrev = NULL;
+
+        // Store the pindexBest used before CreateNewBlock, to avoid races
+        nTransactionsUpdatedLast = nTransactionsUpdated;
+        CBlockIndex* pindexPrevNew = pindexBest;
+        nStart = GetTime();
+
+        // Create new block
+        if(pblock)
+        {
+            delete pblock;
+            pblock = NULL;
+        }
+        pblock = CreateNewBlock(pwalletMain);
+        if (!pblock)
+            throw JSONRPCError(-7, "Out of memory");
+
+        // Need to update only after we know CreateNewBlock succeeded
+        pindexPrev = pindexPrevNew;
+    }
+
+    // Update nTime
+    pblock->UpdateTime(pindexPrev);
+    pblock->nNonce = 0;
+
+    Array transactions;
+    map<uint256, int64_t> setTxIndex;
+    int i = 0;
+    CTxDB txdb("r");
+    BOOST_FOREACH (CTransaction& tx, pblock->vtx)
+    {
+        uint256 txHash = tx.GetHash();
+        setTxIndex[txHash] = i++;
+
+        if (tx.IsCoinBase() || tx.IsCoinStake())
+            continue;
+
+        Object entry;
+
+        CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
+        ssTx << tx;
+        entry.push_back(Pair("data", HexStr(ssTx.begin(), ssTx.end())));
+
+        entry.push_back(Pair("hash", txHash.GetHex()));
+
+        MapPrevTx mapInputs;
+        map<uint256, CTxIndex> mapUnused;
+        bool fInvalid = false;
+        if (tx.FetchInputs(txdb, mapUnused, false, false, mapInputs, fInvalid))
+        {
+            entry.push_back(Pair("fee", (int64_t)(tx.GetValueIn(mapInputs) - tx.GetValueOut())));
+
+            Array deps;
+            BOOST_FOREACH (MapPrevTx::value_type& inp, mapInputs)
+            {
+                if (setTxIndex.count(inp.first))
+                    deps.push_back(setTxIndex[inp.first]);
+            }
+            entry.push_back(Pair("depends", deps));
+
+            int64_t nSigOps = tx.GetLegacySigOpCount();
+            nSigOps += tx.GetP2SHSigOpCount(mapInputs);
+            entry.push_back(Pair("sigops", nSigOps));
+        }
+
+        transactions.push_back(entry);
+    }
+
+    Object aux;
+    aux.push_back(Pair("flags", HexStr(COINBASE_FLAGS.begin(), COINBASE_FLAGS.end())));
+
+    uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
+
+    static Array aMutable;
+    if (aMutable.empty())
+    {
+        aMutable.push_back("time");
+        aMutable.push_back("transactions");
+        aMutable.push_back("prevblock");
+    }
+
+    Object result;
+    result.push_back(Pair("version", pblock->nVersion));
+    result.push_back(Pair("previousblockhash", pblock->hashPrevBlock.GetHex()));
+    result.push_back(Pair("transactions", transactions));
+    result.push_back(Pair("coinbaseaux", aux));
+    result.push_back(Pair("coinbasevalue", (int64_t)pblock->vtx[0].vout[0].nValue));
+    result.push_back(Pair("target", hashTarget.GetHex()));
+    result.push_back(Pair("mintime", (int64_t)pindexPrev->GetMedianTimePast()+1));
+    result.push_back(Pair("mutable", aMutable));
+    result.push_back(Pair("noncerange", "00000000ffffffff"));
+    result.push_back(Pair("sigoplimit", (int64_t)MAX_BLOCK_SIGOPS));
+    result.push_back(Pair("sizelimit", (int64_t)MAX_BLOCK_SIZE));
+    result.push_back(Pair("curtime", (int64_t)pblock->nTime));
+    result.push_back(Pair("bits", HexBits(pblock->nBits)));
+    result.push_back(Pair("height", (int64_t)(pindexPrev->nHeight+1)));
+
+    return result;
+}
+
+Value submitblock(const Array& params, bool fHelp)
+{
+    if (fHelp || params.size() < 1 || params.size() > 2)
+        throw runtime_error(
+            "submitblock <hex data> [optional-params-obj]\n"
+            "[optional-params-obj] parameter is currently ignored.\n"
+            "Attempts to submit new block to network.\n"
+            "See https://en.bitcoin.it/wiki/BIP_0022 for full specification.");
+
+    vector<unsigned char> blockData(ParseHex(params[0].get_str()));
+    CDataStream ssBlock(blockData, SER_NETWORK, PROTOCOL_VERSION);
+    CBlock block;
+    try {
+        ssBlock >> block;
+    }
+    catch (std::exception &e) {
+        throw JSONRPCError(-22, "Block decode failed");
+    }
+
+    static CReserveKey reservekey(pwalletMain);
+
+    if(!block.SignBlock(*pwalletMain))
+        throw JSONRPCError(-100, "Unable to sign block, wallet locked?");
+
+    bool fAccepted = CheckWork(&block, *pwalletMain, reservekey);
+    if (!fAccepted)
+        return "rejected";
+
+    return Value::null;
+}
+
 Value getnewpubkey(const Array& params, bool fHelp)
 {
     if (fHelp || params.size() > 1)
@@ -2329,6 +2513,8 @@ static const CRPCCommand vRPCCommands[] =
     { "listaccounts",           &listaccounts,           false },
     { "settxfee",               &settxfee,               false },
     { "getmemorypool",          &getmemorypool,          true },
+    { "getblocktemplate",       &getblocktemplate,       true },
+    { "submitblock",            &submitblock,            false },
     { "listsinceblock",         &listsinceblock,         false },
     { "dumpprivkey",            &dumpprivkey,            false },
     { "importprivkey",          &importprivkey,          false },