/// <summary>
/// Initiates the purchase flow for a set of offers. The callback is triggered after the purchase flow.
/// On success, the set of entitlements that were unlocked will be cached.
/// On success, a Transaction Id will be returned. The Transaction Id can be used to obtain a
/// <see cref="Transaction" /> handle. The handle can then be used to retrieve the entitlements rewarded by the purchase.
/// <seealso cref="Transaction.Release" />
/// <seealso cref="Achievements" />
/// </summary>
/// <param name="options">structure containing filter criteria</param>
/// <param name="clientData">arbitrary data that is passed back to you in the CompletionDelegate</param>
/// <param name="completionDelegate">a callback that is fired when the async operation completes, either successfully or in error</param>
public void Checkout(CheckoutOptions options, object clientData, OnCheckoutCallback completionDelegate)
{
var optionsInternal = Helper.CopyProperties <CheckoutOptionsInternal>(options);
var completionDelegateInternal = new OnCheckoutCallbackInternal(OnCheckout);
var clientDataAddress = IntPtr.Zero;
Helper.AddCallback(ref clientDataAddress, clientData, completionDelegate, completionDelegateInternal);
EOS_Ecom_Checkout(InnerHandle, ref optionsInternal, clientDataAddress, completionDelegateInternal);
Helper.TryMarshalDispose(ref optionsInternal);
}
private static extern void EOS_Ecom_Checkout(IntPtr handle, ref CheckoutOptionsInternal options, IntPtr clientData, OnCheckoutCallbackInternal completionDelegate);
