fix: allow DeliverMax in Payment transaction (#3044)

* fix: allow DeliverMax in Payment tx

* add unit test

Author: khancode

packages/xrpl/src/models/transactions/payment.ts

@@ -226,12 +226,6 @@ export function validatePayment(tx: Record<string, unknown>): void {
   }
 
   checkPartialPayment(tx)
-
-  if (tx.DeliverMax != null) {
-    throw new ValidationError(
-      'PaymentTransaction: Cannot have DeliverMax in a submitted transaction',
-    )
-  }
 }
 
 function checkPartialPayment(tx: Record<string, unknown>): void {

packages/xrpl/test/models/payment.test.ts

@@ -45,6 +45,11 @@ describe('Payment', function () {
     assertValid(payment)
   })
 
+  it(`verifies DeliverMax is valid`, function () {
+    payment.DeliverMax = '1234'
+    assertValid(payment)
+  })
+
   it(`throws -- invalid DomainID type`, function () {
     const paymentTx = {
       TransactionType: 'Payment',