Added DarkGravityWave (DGW), Hard fork at 34140!

README.md

@@ -11,14 +11,12 @@ What is DarkCoin?
 
 DarkCoin is a lite version of Bitcoin using X11 as a proof-of-work algorithm.
  - Super secure hashing algorithm: 11 rounds of scientific hashing functions (blake, bmw, groestl, jh, keccak, skein, luffa, cubehash, shavite, simd, echo)
- - Block reward is controlled by moore's law: (11111 / (((Difficulty+51)/6) ^ 2))
- - CPU only mining
+ - Block reward is controlled by moore's law: 2222222/(((Difficulty+2600)/9)^2)
+ - GPU/CPU only mining
  - Block generation: 2.5 minutes
- - Difficulty Retargets every 576 blocks
- - 84 Million Coins Max
- - Block reward halving every 2 years
- - Encrypted transaction network: Work In Progress
- - Anonymous blockchain using coinjoin technology: Work In Progress
+ - Difficulty Retargets every block using Dark Gravity Wave
+ - Est. ~7M Coins in 2015, ~13M in 2020, ~23M in 2030
+ - Anonymous blockchain using DarkSend technology (Based on CoinJoin): Beta Testing
 
 For more information, as well as an immediately useable, binary version of
 the DarkCoin client sofware, see http://www.darkcoin.io.

bitcoin-qt.pro

@@ -1,7 +1,7 @@
 TEMPLATE = app
 TARGET = darkcoin-qt
 macx:TARGET = "DarkCoin-Qt"
-VERSION = 0.8.9.0
+VERSION = 0.9.0.0
 INCLUDEPATH += src src/json src/qt
 QT += core gui network
 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

share/setup.nsi

@@ -5,8 +5,8 @@ SetCompressor /SOLID lzma
 
 # General Symbol Definitions
 !define REGKEY "SOFTWARE\$(^Name)"
-!define VERSION 0.8.9.0
 !define COMPANY "DarkCoin project"
+!define VERSION 0.9.0.0
 !define URL http://www.darkcoin.io/
 
 # MUI Symbol Definitions
@@ -45,13 +45,13 @@ Var StartMenuGroup
 !insertmacro MUI_LANGUAGE English
 
 # Installer attributes
-OutFile darkcoin-0.8.0.0-win32-setup.exe
+OutFile darkcoin-0.9.0.0-win32-setup.exe
 InstallDir $PROGRAMFILES\DarkCoin
 CRCCheck on
 XPStyle on
 BrandingText " "
 ShowInstDetails show
-VIProductVersion 0.8.9.0
+VIProductVersion 0.9.0.0
 VIAddVersionKey ProductName DarkCoin
 VIAddVersionKey ProductVersion "${VERSION}"
 VIAddVersionKey CompanyName "${COMPANY}"

src/clientversion.h

@@ -7,8 +7,8 @@
 
 // These need to be macros, as version.cpp's and bitcoin-qt.rc's voodoo requires it
 #define CLIENT_VERSION_MAJOR       0
-#define CLIENT_VERSION_MINOR       8
-#define CLIENT_VERSION_REVISION    9
+#define CLIENT_VERSION_MINOR       9
+#define CLIENT_VERSION_REVISION    0
 #define CLIENT_VERSION_BUILD       0
 
 // Set to true for release, false for prerelease or test build

src/main.cpp

@@ -918,6 +918,26 @@ int CMerkleTx::GetDepthInMainChain(CBlockIndex* &pindexRet) const
 }
 
 
+double ConvertBitsToDouble(unsigned int nBits){
+    int nShift = (nBits >> 24) & 0xff;
+
+    double dDiff =
+        (double)0x0000ffff / (double)(nBits & 0x00ffffff);
+
+    while (nShift < 29)
+    {
+        dDiff *= 256.0;
+        nShift++;
+    }
+    while (nShift > 29)
+    {
+        dDiff /= 256.0;
+        nShift--;
+    }
+
+    return dDiff;
+}
+
 int CMerkleTx::GetBlocksToMaturity() const
 {
     if (!IsCoinBase())
@@ -1064,24 +1084,11 @@ uint256 static GetOrphanRoot(const CBlockHeader* pblock)
 
 int64 static GetBlockValue(int nBits, int nHeight, int64 nFees)
 {
-    int nShift = (nBits >> 24) & 0xff;
-
     double dDiff =
         (double)0x0000ffff / (double)(nBits & 0x00ffffff);
 
     /* fixed bug caused diff to not be correctly calculated */
-    if(nHeight > 4500) {
-        while (nShift < 29)
-        {
-            dDiff *= 256.0;
-            nShift++;
-        }
-        while (nShift > 29)
-        {
-            dDiff /= 256.0;
-            nShift--;
-        }
-    }
+    if(nHeight > 4500) dDiff = ConvertBitsToDouble(nBits);
 
     int64 nSubsidy = 0; 
     if(nHeight >= 5465) {
@@ -1206,7 +1213,6 @@ unsigned int static GetNextWorkRequired_V1(const CBlockIndex* pindexLast, const
 }
 
 unsigned int static KimotoGravityWell(const CBlockIndex* pindexLast, const CBlockHeader *pblock, uint64 TargetBlocksSpacingSeconds, uint64 PastBlocksMin, uint64 PastBlocksMax) {
-        /* current difficulty formula, megacoin - kimoto gravity well */
         const CBlockIndex *BlockLastSolved = pindexLast;
         const CBlockIndex *BlockReading = pindexLast;
         const CBlockHeader *BlockCreating = pblock;
@@ -1254,7 +1260,84 @@ unsigned int static KimotoGravityWell(const CBlockIndex* pindexLast, const CBloc
                 bnNew *= PastRateActualSeconds;
                 bnNew /= PastRateTargetSeconds;
         }
-    if (bnNew > bnProofOfWorkLimit) { bnNew = bnProofOfWorkLimit; }
+
+    if (bnNew > bnProofOfWorkLimit) {
+        bnNew = bnProofOfWorkLimit; 
+    }
+        
+    return bnNew.GetCompact();
+}
+
+unsigned int static DarkGravityWave(const CBlockIndex* pindexLast, const CBlockHeader *pblock) {
+    /* current difficulty formula, darkcoin - DarkGravity, written by Evan Duffield - evan@darkcoin.io */
+    const CBlockIndex *BlockLastSolved = pindexLast;
+    const CBlockIndex *BlockReading = pindexLast;
+    const CBlockHeader *BlockCreating = pblock;
+    BlockCreating = BlockCreating;
+    int64 nBlockTimeAverage = 0;
+    int64 nBlockTimeAveragePrev = 0;
+    int64 nBlockTimeCount = 0;
+    int64 nBlockTimeSum2 = 0;
+    int64 nBlockTimeCount2 = 0;
+    int64 LastBlockTime = 0;
+    int64 PastBlocksMin = 14;
+    int64 PastBlocksMax = 140;
+    int64 CountBlocks = 0;
+    CBigNum PastDifficultyAverage;
+    CBigNum PastDifficultyAveragePrev;
+
+    if (BlockLastSolved == NULL || BlockLastSolved->nHeight == 0 || BlockLastSolved->nHeight < PastBlocksMin) { return bnProofOfWorkLimit.GetCompact(); }
+        
+    for (unsigned int i = 1; BlockReading && BlockReading->nHeight > 0; i++) {
+        if (PastBlocksMax > 0 && i > PastBlocksMax) { break; }
+        CountBlocks++;
+
+        if(CountBlocks <= PastBlocksMin) {
+            if (CountBlocks == 1) { PastDifficultyAverage.SetCompact(BlockReading->nBits); }
+            else { PastDifficultyAverage = ((CBigNum().SetCompact(BlockReading->nBits) - PastDifficultyAveragePrev) / CountBlocks) + PastDifficultyAveragePrev; }
+            PastDifficultyAveragePrev = PastDifficultyAverage;
+        }
+
+        if(LastBlockTime > 0){
+            int64 Diff = (LastBlockTime - BlockReading->GetBlockTime());
+            if(Diff < 0) Diff = 0;
+            if(nBlockTimeCount <= PastBlocksMin) {
+                nBlockTimeCount++;
+
+                if (nBlockTimeCount == 1) { nBlockTimeAverage = Diff; }
+                else { nBlockTimeAverage = ((Diff - nBlockTimeAveragePrev) / nBlockTimeCount) + nBlockTimeAveragePrev; }
+                nBlockTimeAveragePrev = nBlockTimeAverage;
+            }
+            nBlockTimeCount2++;
+            nBlockTimeSum2 += Diff;
+        }
+        LastBlockTime = BlockReading->GetBlockTime();      
+
+        if (BlockReading->pprev == NULL) { assert(BlockReading); break; }
+        BlockReading = BlockReading->pprev;
+    }
+    
+    CBigNum bnNew(PastDifficultyAverage);
+    if (nBlockTimeCount != 0 && nBlockTimeCount2 != 0) {
+            double SmartAverage = (((nBlockTimeAverage)*0.7)+((nBlockTimeSum2 / nBlockTimeCount2)*0.3));
+            if(SmartAverage < 1) SmartAverage = 1;
+            double Shift = nTargetSpacing/SmartAverage;
+
+            int64 nActualTimespan = (CountBlocks*nTargetSpacing)/Shift;
+            int64 nTargetTimespan = (CountBlocks*nTargetSpacing);
+            if (nActualTimespan < nTargetTimespan/3)
+                nActualTimespan = nTargetTimespan/3;
+            if (nActualTimespan > nTargetTimespan*3)
+                nActualTimespan = nTargetTimespan*3;
+
+            // Retarget
+            bnNew *= nActualTimespan;
+            bnNew /= nTargetTimespan;
+    }
+
+    if (bnNew > bnProofOfWorkLimit){
+        bnNew = bnProofOfWorkLimit;
+    }
      
     return bnNew.GetCompact();
 }
@@ -1272,20 +1355,21 @@ unsigned int static GetNextWorkRequired_V2(const CBlockIndex* pindexLast, const
         return KimotoGravityWell(pindexLast, pblock, BlocksTargetSpacing, PastBlocksMin, PastBlocksMax);
 }
 
-
 unsigned int static GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHeader *pblock)
 {
         int DiffMode = 1;
         if (fTestNet) {
-                if (pindexLast->nHeight+1 >= 10) { DiffMode = 2; }
+                if (pindexLast->nHeight+1 >= 5) { DiffMode = 3; }
         }
         else {
-                if (pindexLast->nHeight+1 >= 15200) { DiffMode = 2; }
+                if (pindexLast->nHeight+1 >= 34140) { DiffMode = 3; }
+                else if (pindexLast->nHeight+1 >= 15200) { DiffMode = 2; }
         }
 
         if (DiffMode == 1) { return GetNextWorkRequired_V1(pindexLast, pblock); }
         else if (DiffMode == 2) { return GetNextWorkRequired_V2(pindexLast, pblock); }
-        return GetNextWorkRequired_V2(pindexLast, pblock);
+        else if (DiffMode == 3) { return DarkGravityWave(pindexLast, pblock); }
+        return DarkGravityWave(pindexLast, pblock);
 }
 
 
@@ -4527,8 +4611,6 @@ CBlockTemplate* CreateNewBlock(const CScript& scriptPubKeyIn)
         nLastBlockSize = nBlockSize;
         printf("CreateNewBlock(): total size %"PRI64u"\n", nBlockSize);
 
-        float dDiff =
-                (float)0x0000ffff / (float)(pindexPrev->nBits & 0x00ffffff);
         pblock->vtx[0].vout[0].nValue = GetBlockValue(pindexPrev->nBits, pindexPrev->nHeight, nFees);
 
         pblocktemplate->vTxFees[0] = -nFees;