1 files changed, 6 insertions, 2 deletions
diff --git a/findFilename.go b/findFilename.go
index 1b36f38..85ccbf4 100644
--- a/findFilename.go
+++ b/findFilename.go
@@ -1,12 +1,16 @@
 package config
 
 import (
+	"errors"
 	"fmt"
 
 	"google.golang.org/protobuf/proto"
 	"google.golang.org/protobuf/reflect/protoreflect"
 )
 
+var ErrProtoNoVarName error = errors.New("name not in .proto")
+var ErrProtoVarNotString error = errors.New("name exists but is not a string")
+
 // Gemini AI can help author some pretty good protobuf code.
 // I never remember the syntax for 'reflect' on these things.
 
@@ -35,13 +39,13 @@ func GetFilename(pb proto.Message) (string, error) {
 
 	// 4. Check if the field was found. If not, return false.
 	if fieldDescriptor == nil {
-		return "", fmt.Errorf("fieldDescriptor == nil")
+		return "", ErrProtoNoVarName
 	}
 
 	// 5. (Optional but recommended) Verify the field is a string type.
 	if fieldDescriptor.Kind() != protoreflect.StringKind {
 		// The field exists but is not a string, so we can't return it as one.
-		return "", fmt.Errorf("The field exists but is not a string")
+		return "", ErrProtoVarNotString
 	}
 
 	// 6. If the field exists and is a string, get its value.