Add Dogecoin block subsidy calculations.

1 files changed, 39 insertions, 0 deletions

diff --git a/src/dogecoin.cpp b/src/dogecoin.cpp
new file mode 100644
index 000000000..77a8a0093
--- /dev/null
+++ b/src/dogecoin.cpp
@@ -0,0 +1,39 @@
+// Copyright (c) 2015-2017 The Dogecoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <boost/random/uniform_int.hpp>
+#include <boost/random/mersenne_twister.hpp>
+
+#include "dogecoin.h"
+
+int static generateMTRandom(unsigned int s, int range)
+{
+    boost::mt19937 gen(s);
+    boost::uniform_int<> dist(1, range);
+    return dist(gen);
+}
+
+CAmount GetDogecoinBlockSubsidy(int nHeight, const Consensus::Params& consensusParams, uint256 prevHash)
+{
+    int halvings = nHeight / consensusParams.nSubsidyHalvingInterval;
+
+    if (nHeight < 145000) // && !consensusParams.SimplifiedRewards())
+    {
+        // Old-style rewards derived from the previous block hash
+        const std::string cseed_str = prevHash.ToString().substr(7, 7);
+        const char* cseed = cseed_str.c_str();
+        char* endp = NULL;
+        long seed = strtol(cseed, &endp, 16);
+        CAmount maxReward = (1000000 >> halvings) - 1;
+        int rand = generateMTRandom(seed, maxReward);
+
+        return (1 + rand) * COIN;
+    } else if (nHeight < (6 * consensusParams.nSubsidyHalvingInterval)) {
+        // New-style constant rewards for each halving interval
+        return (500000 * COIN) >> halvings;
+    } else {
+        // Constant inflation
+        return 10000 * COIN;
+    }
+}