Fix [U8; 20] h160 maybe decode as utf8

Author: freehere107

types/Call.go

@@ -14,7 +14,10 @@ type Call struct {
 func (s *Call) Process() {
 	start := s.Data.Offset
 	callIndex := utiles.BytesToHex(s.NextBytes(2))
-	callModule := s.Metadata.CallIndex[callIndex]
+	callModule, ok := s.Metadata.CallIndex[callIndex]
+	if !ok {
+		panic(fmt.Sprintf("Not find Extrinsic Lookup %s, please check metadata info", callIndex))
+	}
 	result := map[string]interface{}{
 		"call_index":  callIndex,
 		"call_name":   callModule.Call.Name,

types/scaleInfo.go

@@ -259,6 +259,10 @@ func (s *ScaleInfo) expandComposite(id int, SiTyp SiType, id2Portable map[int]Si
 			s.RegisteredSiType[id] = "AccountId"
 			return s.RegisteredSiType[id]
 		}
+		if len(SiTyp.Path) > 0 && SiTyp.Path[len(SiTyp.Path)-1] == "AccountId20" {
+			s.RegisteredSiType[id] = "H160"
+			return s.RegisteredSiType[id]
+		}
 		subTypeId := SiTyp.Def.Composite.Fields[0].Type
 		subType, ok := s.RegisteredSiType[subTypeId]
 		if !ok {