From 82afa858be3517ba477b4448809d3f7a3355ec01 Mon Sep 17 00:00:00 2001
From: alex <alex@alex-VirtualBox.(none)>
Date: Wed, 10 Apr 2013 02:01:45 +0400
Subject: [PATCH] Add getworkex

---
 src/bitcoinrpc.cpp |  133 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 133 insertions(+), 0 deletions(-)

diff --git a/src/bitcoinrpc.cpp b/src/bitcoinrpc.cpp
index f149dd2..3020691 100644
--- a/src/bitcoinrpc.cpp
+++ b/src/bitcoinrpc.cpp
@@ -1956,6 +1956,138 @@ Value validatepubkey(const Array& params, bool fHelp)
     return ret;
 }
 
+Value getworkex(const Array& params, bool fHelp)
+{
+    if (fHelp || params.size() > 2)
+        throw runtime_error(
+            "getworkex [data, coinbase]\n"
+            "If [data, coinbase] is not specified, returns extended work data.\n"
+        );
+
+    if (vNodes.empty())
+        throw JSONRPCError(-9, "NovaCoin is not connected!");
+
+    if (IsInitialBlockDownload())
+        throw JSONRPCError(-10, "NovaCoin is downloading blocks...");
+
+    typedef map<uint256, pair<CBlock*, CScript> > mapNewBlock_t;
+    static mapNewBlock_t mapNewBlock;
+    static vector<CBlock*> vNewBlock;
+    static CReserveKey reservekey(pwalletMain);
+
+    if (params.size() == 0)
+    {
+        // Update block
+        static unsigned int nTransactionsUpdatedLast;
+        static CBlockIndex* pindexPrev;
+        static int64 nStart;
+        static CBlock* pblock;
+        if (pindexPrev != pindexBest ||
+            (nTransactionsUpdated != nTransactionsUpdatedLast && GetTime() - nStart > 60))
+        {
+            if (pindexPrev != pindexBest)
+            {
+                // Deallocate old blocks since they're obsolete now
+                mapNewBlock.clear();
+                BOOST_FOREACH(CBlock* pblock, vNewBlock)
+                    delete pblock;
+                vNewBlock.clear();
+            }
+            nTransactionsUpdatedLast = nTransactionsUpdated;
+            pindexPrev = pindexBest;
+            nStart = GetTime();
+
+            // Create new block
+            pblock = CreateNewBlock(pwalletMain);
+            if (!pblock)
+                throw JSONRPCError(-7, "Out of memory");
+            vNewBlock.push_back(pblock);
+        }
+
+        // Update nTime
+        pblock->nTime = max(pindexPrev->GetMedianTimePast()+1, GetAdjustedTime());
+        pblock->nNonce = 0;
+
+        // Update nExtraNonce
+        static unsigned int nExtraNonce = 0;
+        IncrementExtraNonce(pblock, pindexPrev, nExtraNonce);
+
+        // Save
+        mapNewBlock[pblock->hashMerkleRoot] = make_pair(pblock, pblock->vtx[0].vin[0].scriptSig);
+
+        // Prebuild hash buffers
+        char pmidstate[32];
+        char pdata[128];
+        char phash1[64];
+        FormatHashBuffers(pblock, pmidstate, pdata, phash1);
+
+        uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
+
+        CTransaction coinbaseTx = pblock->vtx[0];
+        std::vector<uint256> merkle = pblock->GetMerkleBranch(0);
+
+        Object result;
+        result.push_back(Pair("data",     HexStr(BEGIN(pdata), END(pdata))));
+        result.push_back(Pair("target",   HexStr(BEGIN(hashTarget), END(hashTarget))));
+
+        CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
+        ssTx << coinbaseTx;
+        result.push_back(Pair("coinbase", HexStr(ssTx.begin(), ssTx.end())));
+
+        Array merkle_arr;
+        printf("DEBUG: merkle size %i\n", merkle.size());
+
+        BOOST_FOREACH(uint256 merkleh, merkle) {
+            printf("%s\n", merkleh.ToString().c_str());
+            merkle_arr.push_back(HexStr(BEGIN(merkleh), END(merkleh)));
+        }
+
+        result.push_back(Pair("merkle", merkle_arr));
+
+
+        return result;
+    }
+    else
+    {
+        // Parse parameters
+        vector<unsigned char> vchData = ParseHex(params[0].get_str());
+        vector<unsigned char> coinbase;
+
+        if(params.size() == 2)
+            coinbase = ParseHex(params[1].get_str());
+
+        if (vchData.size() != 128)
+            throw JSONRPCError(-8, "Invalid parameter");
+
+        CBlock* pdata = (CBlock*)&vchData[0];
+
+        // Byte reverse
+        for (int i = 0; i < 128/4; i++)
+            ((unsigned int*)pdata)[i] = ByteReverse(((unsigned int*)pdata)[i]);
+
+        // Get saved block
+        if (!mapNewBlock.count(pdata->hashMerkleRoot))
+            return false;
+        CBlock* pblock = mapNewBlock[pdata->hashMerkleRoot].first;
+
+        pblock->nTime = pdata->nTime;
+        pblock->nNonce = pdata->nNonce;
+
+        if(coinbase.size() == 0)
+            pblock->vtx[0].vin[0].scriptSig = mapNewBlock[pdata->hashMerkleRoot].second;
+        else
+            CDataStream(coinbase, SER_NETWORK, PROTOCOL_VERSION) >> pblock->vtx[0]; // FIXME - HACK!
+
+        pblock->hashMerkleRoot = pblock->BuildMerkleTree();
+
+        if (!pblock->SignBlock(*pwalletMain))
+            throw JSONRPCError(-100, "Unable to sign block, wallet locked?");
+
+
+        return CheckWork(pblock, *pwalletMain, reservekey);
+    }
+}
+
 
 Value getwork(const Array& params, bool fHelp)
 {
@@ -2705,6 +2837,7 @@ static const CRPCCommand vRPCCommands[] =
     { "signmessage",            &signmessage,            false },
     { "verifymessage",          &verifymessage,          false },
     { "getwork",                &getwork,                true },
+    { "getworkex",              &getworkex,              true },
     { "listaccounts",           &listaccounts,           false },
     { "settxfee",               &settxfee,               false },
     { "getmemorypool",          &getmemorypool,          true },
-- 
1.7.1