fix(core): fix amount capturable in payments response (#1437)

crates/router/src/core/payments/operations/payment_response.rs

@@ -284,7 +284,7 @@ impl<F: Clone> PostUpdateTracker<F, PaymentData<F>, types::CompleteAuthorizeData
     }
 }
 
-async fn payment_response_update_tracker<F: Clone, T>(
+async fn payment_response_update_tracker<F: Clone, T: types::Capturable>(
     db: &dyn StorageInterface,
     _payment_id: &api::PaymentIdType,
     mut payment_data: PaymentData<F>,
@@ -428,10 +428,11 @@ async fn payment_response_update_tracker<F: Clone, T>(
             .to_not_found_response(errors::ApiErrorResponse::PaymentNotFound)?,
         None => payment_data.connector_response,
     };
+    let amount = router_data.request.get_capture_amount();
 
     let amount_captured = router_data.amount_captured.or_else(|| {
         if router_data.status == enums::AttemptStatus::Charged {
-            Some(payment_data.payment_intent.amount)
+            amount
         } else {
             None
         }

crates/router/src/core/payments/transformers.rs

@@ -361,13 +361,15 @@ where
                     })
                     .transpose()
                     .unwrap_or_default();
+                let amount_captured = payment_intent.amount_captured.unwrap_or_default();
+                let amount_capturable = Some(payment_attempt.amount - amount_captured);
                 services::ApplicationResponse::Json(
                     response
                         .set_payment_id(Some(payment_attempt.payment_id))
                         .set_merchant_id(Some(payment_attempt.merchant_id))
                         .set_status(payment_intent.status.foreign_into())
                         .set_amount(payment_attempt.amount)
-                        .set_amount_capturable(None)
+                        .set_amount_capturable(amount_capturable)
                         .set_amount_received(payment_intent.amount_captured)
                         .set_connector(routed_through)
                         .set_client_secret(payment_intent.client_secret.map(masking::Secret::new))

crates/router/src/types.rs

@@ -347,6 +347,34 @@ pub struct AccessTokenRequestData {
     // Add more keys if required
 }
 
+pub trait Capturable {
+    fn get_capture_amount(&self) -> Option<i64> {
+        Some(0)
+    }
+}
+
+impl Capturable for PaymentsAuthorizeData {
+    fn get_capture_amount(&self) -> Option<i64> {
+        Some(self.amount)
+    }
+}
+
+impl Capturable for PaymentsCaptureData {
+    fn get_capture_amount(&self) -> Option<i64> {
+        Some(self.amount_to_capture)
+    }
+}
+
+impl Capturable for CompleteAuthorizeData {
+    fn get_capture_amount(&self) -> Option<i64> {
+        Some(self.amount)
+    }
+}
+impl Capturable for VerifyRequestData {}
+impl Capturable for PaymentsCancelData {}
+impl Capturable for PaymentsSessionData {}
+impl Capturable for PaymentsSyncData {}
+
 pub struct AddAccessTokenResult {
     pub access_token_result: Result<Option<AccessToken>, ErrorResponse>,
     pub connector_supports_access_token: bool,