server/src/Core/Services/IAppleIapService.cs

using System;
using System.Threading.Tasks;
using Bit.Billing.Models;

namespace Bit.Core.Services
{
    public interface IAppleIapService
    {
        Task<AppleReceiptStatus> GetVerifiedReceiptStatusAsync(string receiptData);
        Task SaveReceiptAsync(AppleReceiptStatus receiptStatus, Guid userId);
        Task<Tuple<string, Guid?>> GetReceiptAsync(string originalTransactionId);
    }
}