[fix] Add missing parameters for creating orders (#561)

- Port missing create shipment parameters to create order
- Update changelog
- Update examples submodule

CHANGELOG.md

@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## Next Release
+
+- Add missing parameters for `Order.Create` parameter set
+
 ## v6.3.1 (2024-04-12)
 
 - Fix `CarrierFields` serialization bug causing carrier account operations to fail

EasyPost/Parameters/Order/Create.cs

@@ -12,6 +12,13 @@ public class Create : BaseParameters<Models.API.Order>, IOrderParameter
     {
         #region Request Parameters
 
+        /// <summary>
+        ///     The <see cref="Address"/> (or <see cref="Address.Create"/> parameters) of the buyer for the new <see cref="Models.API.Order"/>.
+        ///     Defaults to <see cref="ToAddress"/> if not provided.
+        /// </summary>
+        [TopLevelRequestParameter(Necessity.Optional, "order", "buyer_address")]
+        public IAddressParameter? BuyerAddress { get; set; }
+
         /// <summary>
         ///     List of <see cref="Models.API.CarrierAccount"/>s to use to create the new <see cref="Models.API.Order"/>.
         ///     The provided <see cref="Models.API.CarrierAccount"/>s must exist prior to making the API call.
@@ -31,6 +38,13 @@ public class Create : BaseParameters<Models.API.Order>, IOrderParameter
         [TopLevelRequestParameter(Necessity.Optional, "order", "reference")]
         public string? Reference { get; set; }
 
+        /// <summary>
+        ///     The return <see cref="Models.API.Address"/> (or <see cref="Address.Create"/> parameters) for the new <see cref="Models.API.Order"/>.
+        ///     Defaults to <see cref="FromAddress"/> if not provided.
+        /// </summary>
+        [TopLevelRequestParameter(Necessity.Optional, "order", "return_address")]
+        public IAddressParameter? ReturnAddress { get; set; }
+
         /// <summary>
         ///     List of <see cref="Models.API.Shipment"/>s (or <see cref="Shipment.Create"/> parameter sets) for the new <see cref="Models.API.Order"/>.
         /// </summary>