Necesita cerrar la interfaz de pago si el pago falla. Ahora muestra un error en lugar de cerrar.

 paymentRequest.on('paymentmethod', function(ev) { console.log('ev response',ev) that.accountService.makePaymentIntent(totAmt).then((data)=>{ console.log("Promise resolved with: " + JSON.stringify(data)); let clientSecret = data.data.client_secret; // Confirm the PaymentIntent without handling potential next actions (yet). stripe.confirmCardPayment( clientSecret, {payment_method: ev.paymentMethod.id}, {handleActions: false} ).then(function(confirmResult) { console.log('confirmResult',confirmResult); if (confirmResult.error) { // Report to the browser that the payment failed, prompting it to // re-show the payment interface, or show an error message and close // the payment interface. ev.complete('fail'); } else { // Report to the browser that the confirmation was successful, prompting // it to close the browser payment method collection interface. ev.complete('success'); // Check if the PaymentIntent requires any actions and if so let Stripe.js // handle the flow. If using an API version older than "2019-02-11" // instead check for: `paymentIntent.status === "requires_source_action"`. if (confirmResult.paymentIntent.status === "requires_action") { // Let Stripe.js handle the rest of the payment flow. stripe.confirmCardPayment(clientSecret).then(function(result) { console.log('confirmCardPayment result',result); if (result.error) { // The payment failed -- ask your customer for a new payment method. } else { that.orderComplete(confirmResult, ev); } }); } else { // The payment has succeeded. that.orderComplete(confirmResult, ev); } } }); }).catch((error)=>{ ev.complete('success'); console.log("Promise rejected with " + JSON.stringify(error)); that.orderFailed(error); }); });