Issue #3063729 by embeau, rbrownell: Error bad character content for element 'amount'

src/Plugin/Commerce/PaymentGateway/Onsite.php

@@ -110,7 +110,7 @@ class Onsite extends OnsitePaymentGatewayBase implements OnsiteInterface {
     $this->assertPaymentMethod($payment_method);
 
     $amount = $payment->getAmount();
-    $number = $amount->getNumber();
+    $number = number_format($amount->getNumber(), 2);
     $payment_method_token = $payment_method->getRemoteId();
 
     $moneris_order_id = $payment->getOrderId() . '-' . $payment->uuid() . '-' . date("dmy-G:i:s");
@@ -151,7 +151,7 @@ class Onsite extends OnsitePaymentGatewayBase implements OnsiteInterface {
     $this->assertPaymentState($payment, ['authorization']);
     // If not specified, capture the entire amount.
     $amount = $amount ?: $payment->getAmount();
-    $number = $amount->getNumber();
+    $number = number_format($amount->getNumber(), 2);
 
     $remote_id = explode('|', $payment->getRemoteId());
 
@@ -235,7 +235,7 @@ class Onsite extends OnsitePaymentGatewayBase implements OnsiteInterface {
     // Validate the requested amount.
     $this->assertRefundAmount($payment, $amount);
 
-    $number = $amount->getNumber();
+    $number = number_format($amount->getNumber(), 2);
 
     $remote_id = explode('|', $payment->getRemoteId());