Add mainnet checkpoint at block 67500

src/chainparams.cpp

@@ -128,11 +128,12 @@ public:
             boost::assign::map_list_of
             (0, consensus.hashGenesisBlock)
             (2500, uint256S("0x00000006dc968f600be11a86cbfbf7feb61c7577f45caced2e82b6d261d19744"))
-            (15000, uint256S("0x00000000b6bc56656812a5b8dcad69d6ad4446dec23b5ec456c18641fb5381ba")),
-            1479851027,     // * UNIX timestamp of last checkpoint block
-            110415,         // * total number of transactions between genesis and last checkpoint
+            (15000, uint256S("0x00000000b6bc56656812a5b8dcad69d6ad4446dec23b5ec456c18641fb5381ba"))
+            (67500, uint256S("0x000000006b366d2c1649a6ebb4787ac2b39c422f451880bc922e3a6fbd723616")),
+            1487767578,     // * UNIX timestamp of last checkpoint block
+            325430,         // * total number of transactions between genesis and last checkpoint
                             //   (the tx=... number in the SetBestChain debug.log lines)
-            4240            // * estimated number of transactions per day after checkpoint
+            2777            // * estimated number of transactions per day after checkpoint
                             //   total number of tx / (checkpoint block height / (24 * 24))
         };