Modify chain consensus parameters to be height aware (#1396)

* Modify chain consensus parameters to be height aware
* Correct implementation of simplified rewards in parameters
* Correct max money
* Use base block version in IsSuperMajority() instead of full version
* Correct mining of blocks in AuxPoW tests
* Add in missing pre-AuxPoW consensus checks

1 files changed, 16 insertions, 0 deletions

diff --git a/src/pow.cpp b/src/pow.cpp
index b569e709a..b0deab393 100644
--- a/src/pow.cpp
+++ b/src/pow.cpp
@@ -13,6 +13,22 @@
 #include "uint256.h"
 #include "util.h"
 
+// Determine if the for the given block, a min difficulty setting applies
+bool AllowMinDifficultyForBlock(const CBlockIndex* pindexLast, const CBlockHeader *pblock, const Consensus::Params& params)
+{
+    // check if the chain allows minimum difficulty blocks
+    if (!params.fPowAllowMinDifficultyBlocks)
+        return false;
+
+    // Dogecoin: Magic number at which reset protocol switches
+    // check if we allow minimum difficulty at this block-height
+    if (pindexLast->nHeight < 157500)
+        return false;
+
+    // Allow for a minimum block time if the elapsed time > 2*nTargetSpacing
+    return (pblock->GetBlockTime() > pindexLast->GetBlockTime() + params.nPowTargetSpacing*2);
+}
+
 unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHeader *pblock, const Consensus::Params& params)
 {
     unsigned int nProofOfWorkLimit = UintToArith256(params.powLimit).GetCompact();