[CHORE] Testnet config (#663)

Author: Michał Mrożek

src/main/resources/chains/private.conf

@@ -1,8 +1,20 @@
 {
-  include "base.conf"
-  chain-id = "0x2A"
-  network-id = 42
-  custom-genesis-file = "chains/private-genesis.json"
-  dao = null
-  bootstrap-nodes = []
+    include "base.conf"
+    frontier-block-number = "0"
+    homestead-block-number = "0"
+    eip150-block-number = "0"
+    eip155-block-number = "0"
+    eip160-block-number = "0"
+    difficulty-bomb-pause-block-number = "0"
+    difficulty-bomb-continue-block-number = "0"
+    difficulty-bomb-removal-block-number = "0"
+    atlantis-block-number = "0"
+    agharta-block-number = "0"
+    phoenix-block-number = "0"
+
+    chain-id = "0x2A"
+    network-id = 42
+    custom-genesis-file = "chains/private.json"
+    dao = null
+    bootstrap-nodes = []
 }

src/universal/conf/private-testnet.conf

@@ -12,12 +12,21 @@ mantis {
     # Set to false to disable broadcasting the NewBlockHashes message, as its usefulness is debatable,
     # especially in the context of private networks
     broadcast-new-block-hashes = false
+
+    pruning {
+        mode = "archive"
+    }
   }
 
   blockchains {
     network = "private"
   }
 
+  consensus {
+    coinbase = "0011223344556677889900112233445566778899" # has to be changed for each node
+    mining-enabled = true
+  }
+
   network {
     discovery {
       # We assume a fixed cluster, so `bootstrap-nodes` must not be empty