core: notify consensus height for genesis rounds (#296)

* Add notifyGenesisRounds
* Log round for types.Vote and types.Block

1 files changed, 25 insertions, 0 deletions

diff --git a/core/constant.go b/core/constant.go
new file mode 100644
index 0000000..9a61c0a
--- /dev/null
+++ b/core/constant.go
@@ -0,0 +1,25 @@
+// Copyright 2018 The dexon-consensus Authors
+// This file is part of the dexon-consensus library.
+//
+// The dexon-consensus library is free software: you can redistribute it
+// and/or modify it under the terms of the GNU Lesser General Public License as
+// published by the Free Software Foundation, either version 3 of the License,
+// or (at your option) any later version.
+//
+// The dexon-consensus library is distributed in the hope that it will be
+// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
+// General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the dexon-consensus library. If not, see
+// <http://www.gnu.org/licenses/>.
+
+package core
+
+// round shift refers to the difference between block's round and config round
+// derived from its state.
+//
+// For example, when round shift is 2, a block in round 0 should derive config
+// for round 2.
+const roundShift uint64 = 2