add GetNodeConfig() function to backend API (#2216)

api/backend.go

@@ -22,6 +22,7 @@ type StatusBackend interface {
 	StopNode() error
 	// RestartNode() error // NOTE: Only used in tests
 
+	GetNodeConfig() (*params.NodeConfig, error)
 	UpdateRootDataDir(datadir string)
 
 	// SelectAccount(loginParams account.LoginParams) error

api/geth_backend.go

@@ -68,6 +68,8 @@ var (
 	// ErrRPCClientUnavailable is returned if an RPC client can't be retrieved.
 	// This is a normal situation when a node is stopped.
 	ErrRPCClientUnavailable = errors.New("JSON-RPC client is unavailable")
+	// ErrDBNotAvailable is returned if a method is called before the DB is available for usage
+	ErrDBNotAvailable = errors.New("DB is unavailable")
 )
 
 var _ StatusBackend = (*GethStatusBackend)(nil)
@@ -538,6 +540,13 @@ func (b *GethStatusBackend) loadNodeConfig() (*params.NodeConfig, error) {
 	return &conf, nil
 }
 
+func (b *GethStatusBackend) GetNodeConfig() (*params.NodeConfig, error) {
+	if b.appDB == nil {
+		return nil, ErrDBNotAvailable
+	}
+	return b.loadNodeConfig()
+}
+
 func (b *GethStatusBackend) rpcFiltersService() gethnode.ServiceConstructor {
 	return func(*gethnode.ServiceContext) (gethnode.Service, error) {
 		return rpcfilters.New(b.statusNode), nil

api/nimbus_backend.go

@@ -51,6 +51,8 @@ var (
 	// ErrRPCClientUnavailable is returned if an RPC client can't be retrieved.
 	// This is a normal situation when a node is stopped.
 	ErrRPCClientUnavailable = errors.New("JSON-RPC client is unavailable")
+	// ErrDBNotAvailable is returned if a method is called before the DB is available for usage
+	ErrDBNotAvailable = errors.New("DB is unavailable")
 )
 
 var _ StatusBackend = (*nimbusStatusBackend)(nil)
@@ -380,6 +382,13 @@ func (b *nimbusStatusBackend) loadNodeConfig() (*params.NodeConfig, error) {
 	return &conf, nil
 }
 
+func (b *GethStatusBackend) GetNodeConfig() (*params.NodeConfig, error) {
+	if b.appDB == nil {
+		return nil, ErrDBNotAvailable
+	}
+	return b.loadNodeConfig()
+}
+
 func (b *nimbusStatusBackend) rpcFiltersService() nimbussvc.ServiceConstructor {
 	return func(*nimbussvc.ServiceContext) (nimbussvc.Service, error) {
 		return rpcfilters.New(b.statusNode), nil

mobile/status.go

@@ -87,6 +87,22 @@ func SignGroupMembership(content string) string {
 	return string(data)
 }
 
+// GetNodeConfig returns the current config of the Status node
+func GetNodeConfig() string {
+	conf, err := statusBackend.GetNodeConfig()
+	if err != nil {
+		return makeJSONResponse(err)
+	}
+
+	respJSON, err := json.Marshal(conf)
+
+	if err != nil {
+		return makeJSONResponse(err)
+	}
+
+	return string(respJSON)
+}
+
 // ValidateNodeConfig validates config for the Status node.
 func ValidateNodeConfig(configJSON string) string {
 	var resp APIDetailedResponse