diff --git a/src/error.rs b/src/error.rs
index 214615e..f0613c0 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -46,7 +46,7 @@ impl IntoResponse for ServiceError {
 
     fn into_response(self) -> axum::http::Response<Self::Body> {
         let res = match self {
-            ServiceError::Database(err) => ErrorResponse::new(StatusCode::INTERNAL_SERVER_ERROR, Some(err.to_string())),
+            ServiceError::Database(err) => get_oracle_error_response(err),
             ServiceError::ErrorResponse(code, reason) => ErrorResponse::new(code, reason),
         };
         let status = res.status;
@@ -62,4 +62,18 @@ impl ErrorResponse {
             error: message.unwrap_or_else(|| reason.to_string()),
         }
     }
+}
+
+fn get_oracle_error_response(error: sibyl::Error) -> ErrorResponse {
+    match error {
+        sibyl::Error::Interface(_) => ErrorResponse::new(StatusCode::INTERNAL_SERVER_ERROR, None),
+        sibyl::Error::Oracle(code, message) => {
+            if code == 1 || code == 2291 || code == 20111 {
+                ErrorResponse::new(StatusCode::CONFLICT, Some(message))
+            } else {
+                ErrorResponse::new(StatusCode::INTERNAL_SERVER_ERROR, Some(message))
+            }
+        },
+        sibyl::Error::JoinError(_) => ErrorResponse::new(StatusCode::INTERNAL_SERVER_ERROR, None),
+    }
 }
\ No newline at end of file