Add Inner Ring code

pkg/innerring/timers/epoch.go

@@ -0,0 +1,12 @@
+package timers
+
+// NewEpochTick is a new epoch local ticker event.
+type NewEpochTick struct{}
+
+// MorphEvent implements Event interface.
+func (NewEpochTick) MorphEvent() {}
+
+// ResetEpochTimer to start it again when event has been processed.
+func (t *Timers) ResetEpochTimer() {
+	t.epoch.timer.Reset(t.epoch.duration)
+}