IsInitialized > walletLoaded & panic recovery (#266)

* isInitialized update
update walletInitialized to return true is walled.db exist,
add walletLoaded that check if wallet property is nil

* panic handler

server/internal/interface/grpc/interceptors/panic.go

@@ -0,0 +1,45 @@
+package interceptors
+
+import (
+	"context"
+	"runtime/debug"
+
+	log "github.com/sirupsen/logrus"
+	"google.golang.org/grpc"
+)
+
+func unaryPanicRecoveryInterceptor() grpc.UnaryServerInterceptor {
+	return func(
+		ctx context.Context,
+		req interface{},
+		info *grpc.UnaryServerInfo,
+		handler grpc.UnaryHandler,
+	) (interface{}, error) {
+		defer func() {
+			if r := recover(); r != nil {
+				log.Errorf("panic-recovery middleware recovered from panic: %v", r)
+				log.Tracef("panic-recovery middleware recovered from panic: %v", string(debug.Stack()))
+			}
+		}()
+
+		return handler(ctx, req)
+	}
+}
+
+func streamPanicRecoveryInterceptor() grpc.StreamServerInterceptor {
+	return func(
+		srv interface{},
+		stream grpc.ServerStream,
+		info *grpc.StreamServerInfo,
+		handler grpc.StreamHandler,
+	) error {
+		defer func() {
+			if r := recover(); r != nil {
+				log.Errorf("panic-recovery middleware recovered from panic: %v", r)
+				log.Tracef("panic-recovery middleware recovered from panic: %v", string(debug.Stack()))
+			}
+		}()
+
+		return handler(srv, stream)
+	}
+}