fix: proper error message for payment cancel (#192)

crates/router/src/connector/stripe.rs

@@ -431,9 +431,12 @@ impl
         req: &types::PaymentsCancelRouterData,
     ) -> CustomResult<Option<String>, errors::ConnectorError> {
         let stripe_req = utils::Encode::<stripe::CancelRequest>::convert_and_url_encode(req)
-            .change_context(errors::ConnectorError::RequestEncodingFailed)?;
+            .change_context(errors::ConnectorError::RequestEncodingFailedWithReason(
+                "Invalid cancellation reason".to_string(),
+            ))?;
         Ok(Some(stripe_req))
     }
+
     fn build_request(
         &self,
         req: &types::PaymentsCancelRouterData,

crates/router/src/core/errors.rs

@@ -281,6 +281,8 @@ pub enum ConnectorError {
     FailedToObtainIntegrationUrl,
     #[error("Failed to encode connector request")]
     RequestEncodingFailed,
+    #[error("Request encoding failed : {0}")]
+    RequestEncodingFailedWithReason(String),
     #[error("Failed to deserialize connector response")]
     ResponseDeserializationFailed,
     #[error("Failed to execute a processing step: {0:?}")]

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

@@ -102,6 +102,9 @@ impl ConnectorErrorExt for error_stack::Report<errors::ConnectorError> {
                     }
                 }
             }
+            errors::ConnectorError::RequestEncodingFailedWithReason(reason) => {
+                Some(serde_json::json!(reason))
+            }
             _ => None,
         };
         self.change_context(errors::ApiErrorResponse::PaymentAuthorizationFailed { data })