Below is the definition for the IAggregateCartRequest interface used in the Pricing Totalling callback.

public interface IAggregateCartRequest : ICartBaseRequest
    {
        /// <summary>
        /// Get Cart Context
        /// </summary>
        /// <returns></returns>
        public ICartContext GetCartContext ();

        /// <summary>
        /// Request Id
        /// </summary>
        public string RequestId { get; }
    }

Method	Description
ICartBaseRequest	This is the base Interface which IAggregatecartrequest inherits.
GetCartContext	This method provides the context of the cart.
RequestId	This property provides the request ID.

Below is the definition of the ICartBaseRequest interface which IAggregateCartRequest inherits.

public interface ICartBaseRequest : ICallbackBaseRequest
    {
        /// <summary>
        /// Cart Id
        /// </summary>
        public string CartId { get; }
 
        /// <summary>
        /// Cart Object
        /// </summary>
        public IProductConfigurationModel GetCart();
    }

Method	Description
GetCart	This method provides the details of the cart.
CartId	This property provides the value of the cart id.

Below are the ICartContext interface details which is used by GetCartContext() method in IAggregateCartRequest interface.

public interface ICartContext
    {
        /// <summary>
        /// Cart header model
        /// </summary>
        public IProductConfigurationModel GetCart();
 
        /// <summary>
        /// All product lines present in the cart
        /// </summary>
        public List<IProductLineItemModel> GetLineItems();
 
        /// <summary>
        /// Get Summary Groups
        /// </summary>
        List<ISummaryGroup> GetSummaryGroups();
    }

Method	Description
GetCart	This method provides the details of the cart.
GetLineItems	This method provides the data about the lineitems inside the cart.
GetSummaryGroups	This method provides the details of all summary groups present in the cart.

IProductConfigurationModel interface is used by GetCart() method in ICartBaseRequest interface.

Public interface IProductConfigurationModel : IBaseModel<IProductConfiguration>
    {
 
    }
 
IProductConfigurationModel  is inheriting IProductConfiguration so below is the definition of IProductConfiguration.
 
public interface IProductConfiguration : IBaseEntity
    {
        /// <summary>
        /// Sold to Account Id.
        /// </summary>
        public string AccountId { get; set; }
 
        /// <summary>
        /// Price List Id.
        /// </summary>
        public string PriceListId { get; set; }
 
        /// <summary>
        /// Cart Approval Preview Status (pending or complete)
        /// </summary>
        public string ApprovalPreviewStatus { get; set; }
 
        /// <summary>
        /// Cart Approval Status
        /// </summary>
        public string ApprovalStatus { get; set; }
 
        /// <summary>
        /// Billing Preference Id
        /// </summary>
        public string BillingPreferenceId { get; set; }
 
        /// <summary>
        /// Pricing Date for the Cart.
        /// </summary>
        public DateTime? PricingDate { get; set; }
 
        /// <summary>
        /// Start date for the Cart.
        /// </summary>
        public DateTime? ExpectedStartDate { get; set; }
 
        /// <summary>
        /// End date for the Cart.
        /// </summary>
        public DateTime? ExpectedEndDate { get; set; }
 
        /// <summary>
        /// Contract Numbers for querying Price Lists.
        /// </summary>
        public string ContractNumbers { get; set; }
 
        /// <summary>
        /// CouponCodes
        /// </summary>
        public string CouponCodes { get; set; }
 
        /// <summary>
        /// Contains the Effective Price List Id (Quote PriceList)
        /// </summary>
        public string EffectivePriceListId { get; set; }
 
        /// <summary>
        /// To identify cart business object type
        /// </summary>
        public string BusinessObjectType { get; set; }
 
        /// <summary>
        /// Cart Status
        /// </summary>
        public string Status { get; set; }
    }

Method	Description
AccountId	This property provides the details of an account Id against the cart that has been created.
PriceListId	This property contains the details of a Price List id.
ApprovalPreviewStatus	This property contains the details of the status of a cart approval (pending or complete).
ApprovalStatus	This property contains the details of the status of the cart approval.
BillingPreferenceId	This property contains the details of the billing preference ID.
PricingDate	This property contains the details of the date and time of the pricing for the cart.
ExpectedStartDate	This property contains the details of the start date and time of the cart.
ExpectedEndDate	This property contains the details of the end date and time of the cart.
ContractNumbers	This property contains the details of the contact numbers for querying price lists.
CouponCodes	This property contains the details of the coupon codes applied on the cart.
EffectivePriceListId	This property contains the details of the effective price list id of the quote price list.
BusinessObjectType	This property contains the details of the identified business object type of the cart.
Status	This property contains the details of the cart status.