[#446] innerring: Rename `server.Index` to `server.InnerRingIndex`

With different indexes for inner ring list and alphabet list this
is the better naming.

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

pkg/innerring/processors/alphabet/process_emit.go

@@ -10,7 +10,7 @@ import (
 )
 
 func (np *Processor) processEmit() {
-	index := np.irList.Index()
+	index := np.irList.InnerRingIndex()
 	if index < 0 {
 		np.log.Info("passive mode, ignore gas emission event")
 

pkg/innerring/processors/alphabet/processor.go

@@ -12,7 +12,7 @@ import (
 type (
 	// Indexer is a callback interface for inner ring global state.
 	Indexer interface {
-		Index() int
+		InnerRingIndex() int
 	}
 
 	// Contracts is an interface of the storage

pkg/innerring/processors/audit/processor.go

@@ -21,7 +21,7 @@ import (
 type (
 	// Indexer is a callback interface for inner ring global state.
 	Indexer interface {
-		Index() int
+		InnerRingIndex() int
 		InnerRingSize() int
 	}
 

pkg/innerring/processors/audit/scheduler.go

@@ -27,7 +27,7 @@ func (ap *Processor) selectContainersToAudit(epoch uint64) ([]*container.ID, err
 		return strings.Compare(containers[i].String(), containers[j].String()) < 0
 	})
 
-	ind := ap.irList.Index()
+	ind := ap.irList.InnerRingIndex()
 	irSize := ap.irList.InnerRingSize()
 
 	if ind < 0 || ind >= irSize {

pkg/innerring/state.go

@@ -21,12 +21,12 @@ func (s *Server) SetEpochCounter(val uint64) {
 
 // IsActive is a getter for a global active flag state.
 func (s *Server) IsActive() bool {
-	return s.Index() >= 0
+	return s.InnerRingIndex() >= 0
 }
 
-// Index is a getter for a global index of node in inner ring list. Negative
+// InnerRingIndex is a getter for a global index of node in inner ring list. Negative
 // index means that node is not in the inner ring list.
-func (s *Server) Index() int {
+func (s *Server) InnerRingIndex() int {
 	index, err := s.statusIndex.InnerRingIndex()
 	if err != nil {
 		s.log.Error("can't get inner ring index", zap.String("error", err.Error()))
@@ -49,7 +49,7 @@ func (s *Server) InnerRingSize() int {
 }
 
 func (s *Server) voteForSidechainValidator(validators []keys.PublicKey) error {
-	index := s.Index()
+	index := s.InnerRingIndex()
 	if s.contracts.alphabet.indexOutOfRange(index) {
 		s.log.Info("ignore validator vote: node not in alphabet range")