fix(router/webhooks): use api error response for returning errors from webhooks core (#1305)

crates/router/src/core/webhooks/utils.rs

@@ -1,4 +1,7 @@
+use error_stack::ResultExt;
+
 use crate::{
+    core::errors,
     db::{get_and_deserialize_key, StorageInterface},
     types::api,
 };
@@ -45,3 +48,30 @@ pub async fn lookup_webhook_event(
         }
     }
 }
+
+pub trait WebhookApiErrorSwitch<T> {
+    fn switch(self) -> errors::RouterResult<T>;
+}
+
+impl<T> WebhookApiErrorSwitch<T> for errors::CustomResult<T, errors::ConnectorError> {
+    fn switch(self) -> errors::RouterResult<T> {
+        match self {
+            Ok(res) => Ok(res),
+            Err(e) => match e.current_context() {
+                errors::ConnectorError::WebhookSourceVerificationFailed => {
+                    Err(e).change_context(errors::ApiErrorResponse::WebhookAuthenticationFailed)
+                }
+
+                errors::ConnectorError::WebhookSignatureNotFound
+                | errors::ConnectorError::WebhookReferenceIdNotFound
+                | errors::ConnectorError::WebhookEventTypeNotFound
+                | errors::ConnectorError::WebhookResourceObjectNotFound
+                | errors::ConnectorError::WebhookBodyDecodingFailed => {
+                    Err(e).change_context(errors::ApiErrorResponse::WebhookBadRequest)
+                }
+
+                _ => Err(e).change_context(errors::ApiErrorResponse::InternalServerError),
+            },
+        }
+    }
+}