diff --git a/apps/charging-engine/src/errors.rs b/apps/charging-engine/src/errors.rs
index 96c1cb9..aede8a1 100644
--- a/apps/charging-engine/src/errors.rs
+++ b/apps/charging-engine/src/errors.rs
@@ -1,2 +1,8 @@
 pub mod types;
 pub mod helpers;
+
+pub use types::ChargingError;
+pub use helpers::{
+    log_error, validate_amount, validate_bytes, validate_imsi, validate_ip,
+    validate_session_id, ChargingResult, ErrorContext,
+};