creatrd a fallback to ./ for tests

This should be handled by parameter but this is a quick workaround

blockchain/keystore.go

@@ -21,11 +21,18 @@ func NewSimpleKeyStorer(dbPath string) *SimpleKeyStorer {
 		dbPath = "/internal/.secrets"
 	}
 
-	// Create the directory if it doesn't exist
+	// Try to create the directory
 	if _, err := os.Stat(dbPath); os.IsNotExist(err) {
 		err := os.MkdirAll(dbPath, 0755)
 		if err != nil {
-			panic("Failed to create directory: " + err.Error())
+			// Fallback to a local directory
+			dbPath = "./internal/.secrets"
+			if _, err := os.Stat(dbPath); os.IsNotExist(err) {
+				err = os.MkdirAll(dbPath, 0755)
+				if err != nil {
+					panic("Failed to create fallback directory: " + err.Error())
+				}
+			}
 		}
 	}