1 files changed, 35 insertions, 0 deletions
diff --git a/core/errors.go b/core/errors.go
new file mode 100644
index 0000000..fd1133e
--- /dev/null
+++ b/core/errors.go
@@ -0,0 +1,35 @@
+package core
+
+import "fmt"
+
+type PermanentError struct {
+	err error
+}
+
+func NewPermanentError(err error) *PermanentError {
+	if err == nil {
+		return nil
+	}
+
+	return &PermanentError{err: err}
+}
+
+func (e *PermanentError) Error() string {
+	return fmt.Sprintf("permanent client error: %s", e.err.Error())
+}
+
+type UnexpectedError struct {
+	err error
+}
+
+func NewUnexpectedError(err error) *UnexpectedError {
+	if err == nil {
+		return nil
+	}
+
+	return &UnexpectedError{err: err}
+}
+
+func (e *UnexpectedError) Error() string {
+	return fmt.Sprintf("unexpected client error: %s", e.err.Error())
+}