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/interceptor.go

@@ -9,6 +9,7 @@ import (
 // UnaryInterceptor returns the unary interceptor
 func UnaryInterceptor(svc *macaroons.Service) grpc.ServerOption {
 	return grpc.UnaryInterceptor(middleware.ChainUnaryServer(
+		unaryPanicRecoveryInterceptor(),
 		unaryLogger,
 		unaryMacaroonAuthHandler(svc),
 	))
@@ -17,6 +18,7 @@ func UnaryInterceptor(svc *macaroons.Service) grpc.ServerOption {
 // StreamInterceptor returns the stream interceptor with a logrus log
 func StreamInterceptor(svc *macaroons.Service) grpc.ServerOption {
 	return grpc.StreamInterceptor(middleware.ChainStreamServer(
+		streamPanicRecoveryInterceptor(),
 		streamLogger,
 		streamMacaroonAuthHandler(svc),
 	))