Add Inner Ring code

pkg/innerring/state.go

@@ -0,0 +1,17 @@
+package innerring
+
+// EpochCounter is a getter for a global epoch counter.
+func (s *Server) EpochCounter() uint64 {
+	return s.epochCounter.Load()
+}
+
+// SetEpochCounter is a setter for contract processors to update global
+// epoch counter.
+func (s *Server) SetEpochCounter(val uint64) {
+	s.epochCounter.Store(val)
+}
+
+// IsActive is a getter for a global active flag state.
+func (s *Server) IsActive() bool {
+	return s.activeState.Load()
+}