[#1557] morph/event: Remove embedded structs from scriptHashWithValue

Also, make them public, because otherwise `unused` linter complains.
```
pkg/morph/event/utils.go:25:2  unused  field `typ` is unused
```
This complain is wrong, though: we _use_ `typ` field because the whole
struct is used as a map key.

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

pkg/morph/event/listener.go

@@ -180,7 +180,7 @@ func (l *listener) subscribe(errCh chan error) {
 	// fill the list with the contracts with set event parsers.
 	l.mtx.RLock()
 	for hashType := range l.notificationParsers {
-		scHash := hashType.ScriptHash()
+		scHash := hashType.Hash
 
 		// prevent repetitions
 		for _, hash := range hashes {
@@ -189,7 +189,7 @@ func (l *listener) subscribe(errCh chan error) {
 			}
 		}
 
-		hashes = append(hashes, hashType.ScriptHash())
+		hashes = append(hashes, hashType.Hash)
 	}
 	l.mtx.RUnlock()
 
@@ -326,9 +326,7 @@ func (l *listener) parseAndHandleNotification(ctx context.Context, notifyEvent *
 	)
 
 	// get the event parser
-	keyEvent := scriptHashWithType{}
-	keyEvent.SetScriptHash(notifyEvent.ScriptHash)
-	keyEvent.SetType(typEvent)
+	keyEvent := scriptHashWithType{Hash: notifyEvent.ScriptHash, Type: typEvent}
 
 	l.mtx.RLock()
 	parser, ok := l.notificationParsers[keyEvent]
@@ -451,9 +449,7 @@ func (l *listener) RegisterNotificationHandler(hi NotificationHandlerInfo) {
 	l.mtx.Lock()
 	defer l.mtx.Unlock()
 
-	var k scriptHashWithType
-	k.hash = hi.Contract
-	k.typ = hi.Type
+	k := scriptHashWithType{Hash: hi.Contract, Type: hi.Type}
 
 	l.notificationParsers[k] = hi.Parser
 	l.notificationHandlers[k] = append(

pkg/morph/event/utils.go

@@ -20,13 +20,9 @@ type scriptHashValue struct {
 	hash util.Uint160
 }
 
-type typeValue struct {
-	typ Type
-}
-
 type scriptHashWithType struct {
-	scriptHashValue
-	typeValue
+	Hash util.Uint160
+	Type Type
 }
 
 type notaryRequestTypes struct {
@@ -73,16 +69,6 @@ func (s scriptHashValue) ScriptHash() util.Uint160 {
 	return s.hash
 }
 
-// SetType is an event type setter.
-func (s *typeValue) SetType(v Type) {
-	s.typ = v
-}
-
-// GetType is an event type getter.
-func (s typeValue) GetType() Type {
-	return s.typ
-}
-
 // WorkerPoolHandler sets closure over worker pool w with passed handler h.
 func WorkerPoolHandler(w util2.WorkerPool, h Handler, log *logger.Logger) Handler {
 	return func(ctx context.Context, e Event) {