3 files changed, 23 insertions, 1 deletions
diff --git a/rpc/api/eth.go b/rpc/api/eth.go
index 5199bd966..ba87e86c6 100644
--- a/rpc/api/eth.go
+++ b/rpc/api/eth.go
@@ -563,7 +563,12 @@ func (self *ethApi) GetLogs(req *shared.Request) (interface{}, error) {
 
 func (self *ethApi) GetWork(req *shared.Request) (interface{}, error) {
 	self.xeth.SetMining(true, 0)
-	return self.xeth.RemoteMining().GetWork(), nil
+	ret, err := self.xeth.RemoteMining().GetWork()
+	if err != nil {
+		return nil, shared.NewNotReadyError("mining work")
+	} else {
+		return ret, nil
+	}
 }
 
 func (self *ethApi) SubmitWork(req *shared.Request) (interface{}, error) {
diff --git a/rpc/shared/errors.go b/rpc/shared/errors.go
index 85af1bb2f..d5a7011f9 100644
--- a/rpc/shared/errors.go
+++ b/rpc/shared/errors.go
@@ -64,6 +64,20 @@ func NewNotImplementedError(method string) *NotImplementedError {
 	}
 }
 
+type NotReadyError struct {
+	Resource string
+}
+
+func (e *NotReadyError) Error() string {
+	return fmt.Sprintf("%s not ready", e.Resource)
+}
+
+func NewNotReadyError(resource string) *NotReadyError {
+	return &NotReadyError{
+		Resource: resource,
+	}
+}
+
 type DecodeParamError struct {
 	err string
 }
diff --git a/rpc/shared/types.go b/rpc/shared/types.go
index dd9a60aab..db328234d 100644
--- a/rpc/shared/types.go
+++ b/rpc/shared/types.go
@@ -92,6 +92,9 @@ func NewRpcResponse(id interface{}, jsonrpcver string, reply interface{}, err er
 	case *NotImplementedError:
 		jsonerr := &ErrorObject{-32601, err.Error()}
 		response = &ErrorResponse{Jsonrpc: jsonrpcver, Id: id, Error: jsonerr}
+	case *NotReadyError:
+		jsonerr := &ErrorObject{-32000, err.Error()}
+		response = &ErrorResponse{Jsonrpc: jsonrpcver, Id: id, Error: jsonerr}
 	case *DecodeParamError, *InsufficientParamsError, *ValidationError, *InvalidTypeError:
 		jsonerr := &ErrorObject{-32602, err.Error()}
 		response = &ErrorResponse{Jsonrpc: jsonrpcver, Id: id, Error: jsonerr}