Refactor contract type handling in EnvelopeType entity

Replaced Constants.ContractType enum with integer property in EnvelopeType. Updated related references in EnvelopeEditorController. Removed EnvelopeType variable from ModuleSettings. Made EnvelopeType property bindable and initialized in frmEnvelopeMainData to improve consistency and simplify contract type management.

EnvelopeGenerator.Application/Contracts/Repositories/IConfigRepository.cs

@@ -1,7 +1,7 @@
 using DigitalData.Core.Abstraction.Application.Repository;
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Interfaces.Repositories;
+namespace EnvelopeGenerator.Application.Contracts.Repositories;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/Repositories/IDocumentReceiverElementRepository.cs

@@ -1,7 +1,7 @@
 using DigitalData.Core.Abstraction.Application.Repository;
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Interfaces.Repositories;
+namespace EnvelopeGenerator.Application.Contracts.Repositories;
 /// <summary>
 /// 
 /// </summary>

EnvelopeGenerator.Application/Contracts/Repositories/IDocumentStatusRepository.cs

@@ -1,7 +1,7 @@
 using DigitalData.Core.Abstraction.Application.Repository;
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Interfaces.Repositories;
+namespace EnvelopeGenerator.Application.Contracts.Repositories;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/Repositories/IEmailTemplateRepository.cs

@@ -2,7 +2,7 @@
 using EnvelopeGenerator.Domain.Entities;
 using static EnvelopeGenerator.Domain.Constants;
 
-namespace EnvelopeGenerator.Application.Interfaces.Repositories;
+namespace EnvelopeGenerator.Application.Contracts.Repositories;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/Repositories/IEnvelopeCertificateRepository.cs

@@ -0,0 +1,12 @@
+using DigitalData.Core.Abstraction.Application.Repository;
+using EnvelopeGenerator.Domain.Entities;
+
+namespace EnvelopeGenerator.Application.Contracts.Repositories;
+
+/// <summary>
+/// 
+/// </summary>
+[Obsolete("Use Read-method returning IReadQuery<TEntity> instead.")]
+public interface IEnvelopeCertificateRepository : ICRUDRepository<EnvelopeCertificate, int>
+{
+}

EnvelopeGenerator.Application/Contracts/Repositories/IEnvelopeDocumentRepository.cs

@@ -1,7 +1,7 @@
 using DigitalData.Core.Abstraction.Application.Repository;
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Interfaces.Repositories;
+namespace EnvelopeGenerator.Application.Contracts.Repositories;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/Repositories/IEnvelopeHistoryRepository.cs

@@ -2,7 +2,7 @@
 using EnvelopeGenerator.Domain;
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Interfaces.Repositories;
+namespace EnvelopeGenerator.Application.Contracts.Repositories;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/Repositories/IEnvelopeReceiverReadOnlyRepository.cs

@@ -1,7 +1,7 @@
 using DigitalData.Core.Abstraction.Application.Repository;
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Interfaces.Repositories;
+namespace EnvelopeGenerator.Application.Contracts.Repositories;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/Repositories/IEnvelopeReceiverRepository.cs

@@ -1,8 +1,7 @@
 using DigitalData.Core.Abstraction.Application.Repository;
-using EnvelopeGenerator.Domain;
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Interfaces.Repositories;
+namespace EnvelopeGenerator.Application.Contracts.Repositories;
 
 /// <summary>
 /// 
@@ -84,7 +83,7 @@ public interface IEnvelopeReceiverRepository : ICRUDRepository<EnvelopeReceiver,
     /// <param name="max_status"></param>
     /// <param name="ignore_statuses"></param>
     /// <returns></returns>
-    Task<IEnumerable<EnvelopeReceiver>> ReadByUsernameAsync(string username, Constants.EnvelopeStatus? min_status = null, Constants.EnvelopeStatus? max_status = null, params Constants.EnvelopeStatus[] ignore_statuses);
+    Task<IEnumerable<EnvelopeReceiver>> ReadByUsernameAsync(string username, int? min_status = null, int? max_status = null, params int[] ignore_statuses);
 
     /// <summary>
     /// 

EnvelopeGenerator.Application/Contracts/Repositories/IEnvelopeRepository.cs

@@ -1,8 +1,7 @@
 using DigitalData.Core.Abstraction.Application.Repository;
-using EnvelopeGenerator.Domain;
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Interfaces.Repositories;
+namespace EnvelopeGenerator.Application.Contracts.Repositories;
 
 /// <summary>
 /// 
@@ -39,5 +38,5 @@ public interface IEnvelopeRepository : ICRUDRepository<Envelope, int>
     /// <param name="max_status"></param>
     /// <param name="ignore_statuses"></param>
     /// <returns></returns>
-    Task<IEnumerable<Envelope>> ReadByUserAsync(int userId, Constants.EnvelopeStatus? min_status = null, Constants.EnvelopeStatus? max_status = null, params Constants.EnvelopeStatus[] ignore_statuses);
+    Task<IEnumerable<Envelope>> ReadByUserAsync(int userId, int? min_status = null, int? max_status = null, params int[] ignore_statuses);
 }

EnvelopeGenerator.Application/Contracts/Repositories/IEnvelopeTypeRepository.cs

@@ -1,7 +1,7 @@
 using DigitalData.Core.Abstraction.Application.Repository;
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Interfaces.Repositories;
+namespace EnvelopeGenerator.Application.Contracts.Repositories;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/Repositories/IReceiverRepository.cs

@@ -1,7 +1,7 @@
 using DigitalData.Core.Abstraction.Application.Repository;
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Interfaces.Repositories;
+namespace EnvelopeGenerator.Application.Contracts.Repositories;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/SQLExecutor/IDocumentExecutor.cs

@@ -1,6 +1,6 @@
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Interfaces.SQLExecutor;
+namespace EnvelopeGenerator.Application.Contracts.SQLExecutor;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/SQLExecutor/IEnvelopeExecutor.cs

@@ -1,7 +1,7 @@
 using Dapper;
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Interfaces.SQLExecutor;
+namespace EnvelopeGenerator.Application.Contracts.SQLExecutor;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/SQLExecutor/IEnvelopeReceiverExecutor.cs

@@ -1,6 +1,6 @@
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Interfaces.SQLExecutor;
+namespace EnvelopeGenerator.Application.Contracts.SQLExecutor;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/SQLExecutor/IQuery.cs

@@ -1,4 +1,4 @@
-namespace EnvelopeGenerator.Application.Interfaces.SQLExecutor;
+namespace EnvelopeGenerator.Application.Contracts.SQLExecutor;
 
 /// <summary>
 /// Provides methods for executing common queries on a given entity type.

EnvelopeGenerator.Application/Contracts/SQLExecutor/ISQL.cs

@@ -1,4 +1,4 @@
-namespace EnvelopeGenerator.Application.Interfaces.SQLExecutor;
+namespace EnvelopeGenerator.Application.Contracts.SQLExecutor;
 
 /// <summary>
 /// Represents a raw SQL query contract.

EnvelopeGenerator.Application/Contracts/SQLExecutor/ISQLExecutor.cs

@@ -1,4 +1,4 @@
-namespace EnvelopeGenerator.Application.Interfaces.SQLExecutor;
+namespace EnvelopeGenerator.Application.Contracts.SQLExecutor;
 
 /// <summary>
 /// Defines methods for executing raw SQL queries or custom SQL query classes and returning query executors for further operations.

EnvelopeGenerator.Application/Contracts/SQLExecutor/ISQLExecutorBaseEntity.cs

@@ -1,6 +1,6 @@
 using Dapper;
 
-namespace EnvelopeGenerator.Application.Interfaces.SQLExecutor;
+namespace EnvelopeGenerator.Application.Contracts.SQLExecutor;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/Services/IAuthenticator.cs

@@ -1,6 +1,6 @@
 using OtpNet;
 
-namespace EnvelopeGenerator.Application.Interfaces.Services;
+namespace EnvelopeGenerator.Application.Contracts.Services;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/Services/IConfigService.cs

@@ -1,9 +1,9 @@
 using DigitalData.Core.Abstraction.Application;
 using DigitalData.Core.Abstraction.Application.DTO;
-using EnvelopeGenerator.Application.Dto;
+using EnvelopeGenerator.Application.DTOs;
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Interfaces.Services;
+namespace EnvelopeGenerator.Application.Contracts.Services;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/Services/IDocumentReceiverElementService.cs

@@ -1,8 +1,8 @@
 using DigitalData.Core.Abstraction.Application;
-using EnvelopeGenerator.Application.Dto;
+using EnvelopeGenerator.Application.DTOs;
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Interfaces.Services;
+namespace EnvelopeGenerator.Application.Contracts.Services;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/Services/IDocumentStatusService.cs

@@ -1,7 +1,7 @@
 using DigitalData.Core.Abstraction.Application;
-using EnvelopeGenerator.Application.Dto;
+using EnvelopeGenerator.Application.DTOs;
 using EnvelopeGenerator.Domain.Entities;
-namespace EnvelopeGenerator.Application.Interfaces.Services;
+namespace EnvelopeGenerator.Application.Contracts.Services;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/Services/IEmailTemplateService.cs

@@ -1,10 +1,10 @@
 using DigitalData.Core.Abstraction.Application;
 using DigitalData.Core.Abstraction.Application.DTO;
-using EnvelopeGenerator.Application.Dto;
+using EnvelopeGenerator.Application.DTOs;
 using EnvelopeGenerator.Domain.Entities;
 using static EnvelopeGenerator.Domain.Constants;
 
-namespace EnvelopeGenerator.Application.Interfaces.Services;
+namespace EnvelopeGenerator.Application.Contracts.Services;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/Services/IEnvelopeCertificateService.cs

@@ -0,0 +1,13 @@
+using DigitalData.Core.Abstraction.Application;
+using EnvelopeGenerator.Application.DTOs;
+using EnvelopeGenerator.Domain.Entities;
+
+namespace EnvelopeGenerator.Application.Contracts.Services;
+
+/// <summary>
+/// 
+/// </summary>
+[Obsolete("Use MediatR")]
+public interface IEnvelopeCertificateService : IBasicCRUDService<EnvelopeCertificateDto, EnvelopeCertificate, int>
+{
+}

EnvelopeGenerator.Application/Contracts/Services/IEnvelopeDocumentService.cs

@@ -1,8 +1,8 @@
 using DigitalData.Core.Abstraction.Application;
-using EnvelopeGenerator.Application.Dto;
+using EnvelopeGenerator.Application.DTOs;
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Interfaces.Services;
+namespace EnvelopeGenerator.Application.Contracts.Services;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/Services/IEnvelopeHistoryService.cs

@@ -1,11 +1,11 @@
 using DigitalData.Core.Abstraction.Application;
 using DigitalData.Core.Abstraction.Application.DTO;
-using EnvelopeGenerator.Application.Dto.EnvelopeHistory;
-using EnvelopeGenerator.Application.Dto.Receiver;
+using EnvelopeGenerator.Application.DTOs.EnvelopeHistory;
+using EnvelopeGenerator.Application.DTOs.Receiver;
 using EnvelopeGenerator.Domain.Entities;
 using static EnvelopeGenerator.Domain.Constants;
 
-namespace EnvelopeGenerator.Application.Interfaces.Services;
+namespace EnvelopeGenerator.Application.Contracts.Services;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/Services/IEnvelopeMailService.cs

@@ -1,10 +1,10 @@
 using DigitalData.Core.Abstraction.Application.DTO;
 using DigitalData.EmailProfilerDispatcher.Abstraction.Contracts;
-using EnvelopeGenerator.Application.Dto.EnvelopeReceiver;
-using EnvelopeGenerator.Application.Dto.EnvelopeReceiverReadOnly;
+using EnvelopeGenerator.Application.DTOs.EnvelopeReceiver;
+using EnvelopeGenerator.Application.DTOs.EnvelopeReceiverReadOnly;
 using EnvelopeGenerator.Domain;
 
-namespace EnvelopeGenerator.Application.Interfaces.Services;
+namespace EnvelopeGenerator.Application.Contracts.Services;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/Services/IEnvelopeReceiverReadOnlyService.cs

@@ -1,8 +1,8 @@
 using DigitalData.Core.Abstraction.Application;
-using EnvelopeGenerator.Application.Dto.EnvelopeReceiverReadOnly;
+using EnvelopeGenerator.Application.DTOs.EnvelopeReceiverReadOnly;
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Interfaces.Services;
+namespace EnvelopeGenerator.Application.Contracts.Services;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/Services/IEnvelopeReceiverService.cs

@@ -1,15 +1,13 @@
 using CommandDotNet;
 using DigitalData.Core.Abstraction.Application;
 using DigitalData.Core.Abstraction.Application.DTO;
-using EnvelopeGenerator.Application.Dto.EnvelopeReceiver;
-using EnvelopeGenerator.Application.Dto.Messaging;
+using EnvelopeGenerator.Application.DTOs.EnvelopeReceiver;
+using EnvelopeGenerator.Application.DTOs.Messaging;
 using EnvelopeGenerator.Application.Envelopes;
-using EnvelopeGenerator.Application.Envelopes.Queries;
-using EnvelopeGenerator.Application.Receivers.Queries;
-using EnvelopeGenerator.Domain;
+using EnvelopeGenerator.Application.Receivers.Queries.Read;
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Interfaces.Services;
+namespace EnvelopeGenerator.Application.Contracts.Services;
 
 /// <summary>
 /// 
@@ -122,7 +120,7 @@ public interface IEnvelopeReceiverService : IBasicCRUDService<EnvelopeReceiverDt
     /// <param name="receiverQuery"></param>
     /// <param name="ignore_statuses"></param>
     /// <returns></returns>
-    Task<DataResult<IEnumerable<EnvelopeReceiverDto>>> ReadByUsernameAsync(string username, Constants.EnvelopeStatus? min_status = null, Constants.EnvelopeStatus? max_status = null, ReadEnvelopeQuery? envelopeQuery = null, ReadReceiverQuery? receiverQuery = null, params Constants.EnvelopeStatus[] ignore_statuses);
+    Task<DataResult<IEnumerable<EnvelopeReceiverDto>>> ReadByUsernameAsync(string username, int? min_status = null, int? max_status = null, EnvelopeQuery? envelopeQuery = null, ReadReceiverQuery? receiverQuery = null, params int[] ignore_statuses);
 
     /// <summary>
     /// 

EnvelopeGenerator.Application/Contracts/Services/IEnvelopeService.cs

@@ -1,10 +1,9 @@
 using DigitalData.Core.Abstraction.Application;
 using DigitalData.Core.Abstraction.Application.DTO;
-using EnvelopeGenerator.Application.Dto;
-using EnvelopeGenerator.Domain;
+using EnvelopeGenerator.Application.DTOs;
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Interfaces.Services;
+namespace EnvelopeGenerator.Application.Contracts.Services;
 
 /// <summary>
 /// 
@@ -41,5 +40,5 @@ public interface IEnvelopeService : IBasicCRUDService<EnvelopeDto, Envelope, int
     /// <param name="max_status"></param>
     /// <param name="ignore_statuses"></param>
     /// <returns></returns>
-    Task<DataResult<IEnumerable<EnvelopeDto>>> ReadByUserAsync(int userId, Constants.EnvelopeStatus? min_status = null, Constants.EnvelopeStatus? max_status = null, params Constants.EnvelopeStatus[] ignore_statuses);
+    Task<DataResult<IEnumerable<EnvelopeDto>>> ReadByUserAsync(int userId, int? min_status = null, int? max_status = null, params int[] ignore_statuses);
 }

EnvelopeGenerator.Application/Contracts/Services/IEnvelopeSmsHandler.cs

@@ -1,7 +1,7 @@
-using EnvelopeGenerator.Application.Dto.EnvelopeReceiver;
-using EnvelopeGenerator.Application.Dto.Messaging;
+using EnvelopeGenerator.Application.DTOs.EnvelopeReceiver;
+using EnvelopeGenerator.Application.DTOs.Messaging;
 
-namespace EnvelopeGenerator.Application.Interfaces.Services;
+namespace EnvelopeGenerator.Application.Contracts.Services;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/Services/IEnvelopeTypeService.cs

@@ -1,8 +1,8 @@
 using DigitalData.Core.Abstraction.Application;
-using EnvelopeGenerator.Application.Dto;
+using EnvelopeGenerator.Application.DTOs;
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Interfaces.Services;
+namespace EnvelopeGenerator.Application.Contracts.Services;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/Services/IReceiverService.cs

@@ -1,9 +1,9 @@
 using DigitalData.Core.Abstraction.Application;
 using DigitalData.Core.Abstraction.Application.DTO;
-using EnvelopeGenerator.Application.Dto.Receiver;
+using EnvelopeGenerator.Application.DTOs.Receiver;
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Interfaces.Services;
+namespace EnvelopeGenerator.Application.Contracts.Services;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/Contracts/Services/ISmsSender.cs

@@ -1,6 +1,6 @@
-using EnvelopeGenerator.Application.Dto.Messaging;
+using EnvelopeGenerator.Application.DTOs.Messaging;
 
-namespace EnvelopeGenerator.Application.Interfaces.Services;
+namespace EnvelopeGenerator.Application.Contracts.Services;
 
 //TODO: move to DigitalData.Core
 /// <summary>

EnvelopeGenerator.Application/DTOs/ConfigDto.cs

@@ -1,6 +1,6 @@
 using Microsoft.AspNetCore.Mvc;
 
-namespace EnvelopeGenerator.Application.Dto;
+namespace EnvelopeGenerator.Application.DTOs;
 
 /// <summary>
 /// Data Transfer Object representing configuration settings.

EnvelopeGenerator.Application/DTOs/DocumentReceiverElementDto.cs

@@ -1,6 +1,6 @@
 using Microsoft.AspNetCore.Mvc;
 
-namespace EnvelopeGenerator.Application.Dto;
+namespace EnvelopeGenerator.Application.DTOs;
 
 /// <summary>
 /// Data Transfer Object representing a positioned element assigned to a document receiver.

EnvelopeGenerator.Application/DTOs/DocumentStatusDto.cs

@@ -1,6 +1,6 @@
 using Microsoft.AspNetCore.Mvc;
 
-namespace EnvelopeGenerator.Application.Dto;
+namespace EnvelopeGenerator.Application.DTOs;
 
 /// <summary>
 /// Data Transfer Object representing the status of a document for a specific receiver.

EnvelopeGenerator.Application/DTOs/EmailTemplateDto.cs

@@ -1,6 +1,6 @@
 using Microsoft.AspNetCore.Mvc;
 
-namespace EnvelopeGenerator.Application.Dto
+namespace EnvelopeGenerator.Application.DTOs
 {
     /// <summary>
     /// 

EnvelopeGenerator.Application/DTOs/EnvelopeCertificateDto.cs

@@ -0,0 +1,50 @@
+using Microsoft.AspNetCore.Mvc;
+
+namespace EnvelopeGenerator.Application.DTOs;
+
+/// <summary>
+/// Data Transfer Object representing certificate information for an envelope.
+/// </summary>
+[ApiExplorerSettings(IgnoreApi = true)]
+public class EnvelopeCertificateDto
+{
+    /// <summary>
+    /// Gets the unique identifier of the certificate.
+    /// </summary>
+    public int Id { get; init; }
+
+    /// <summary>
+    /// Gets the envelope ID associated with the certificate.
+    /// </summary>
+    public int EnvelopeId { get; init; }
+
+    /// <summary>
+    /// Gets the UUID of the envelope.
+    /// </summary>
+    public string EnvelopeUuid { get; init; } = string.Empty;
+
+    /// <summary>
+    /// Gets the subject of the envelope.
+    /// </summary>
+    public string EnvelopeSubject { get; init; } = string.Empty;
+
+    /// <summary>
+    /// Gets the ID of the creator of the envelope.
+    /// </summary>
+    public int CreatorId { get; init; }
+
+    /// <summary>
+    /// Gets the name of the creator.
+    /// </summary>
+    public string CreatorName { get; init; } = string.Empty;
+
+    /// <summary>
+    /// Gets the email address of the creator.
+    /// </summary>
+    public string CreatorEmail { get; init; } = string.Empty;
+
+    /// <summary>
+    /// Gets the current status of the envelope.
+    /// </summary>
+    public int EnvelopeStatus { get; init; }
+}

EnvelopeGenerator.Application/DTOs/EnvelopeDocumentDto.cs

@@ -1,6 +1,6 @@
 using Microsoft.AspNetCore.Mvc;
 
-namespace EnvelopeGenerator.Application.Dto;
+namespace EnvelopeGenerator.Application.DTOs;
 
 /// <summary>
 /// Data Transfer Object representing a document within an envelope, including optional binary data and form elements.

EnvelopeGenerator.Application/DTOs/EnvelopeDto.cs

@@ -3,7 +3,7 @@ using DigitalData.UserManager.Application.DTOs.User;
 using EnvelopeGenerator.Domain.Entities;
 using Microsoft.AspNetCore.Mvc;
 
-namespace EnvelopeGenerator.Application.Dto;
+namespace EnvelopeGenerator.Application.DTOs;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/DTOs/EnvelopeHistory/EnvelopeHistoryCreateDto.cs

@@ -1,6 +1,6 @@
 using Microsoft.AspNetCore.Mvc;
 
-namespace EnvelopeGenerator.Application.Dto.EnvelopeHistory;
+namespace EnvelopeGenerator.Application.DTOs.EnvelopeHistory;
 
 /// <summary>
 /// Data Transfer Object for creating a new envelope history record.

EnvelopeGenerator.Application/DTOs/EnvelopeHistory/EnvelopeHistoryDto.cs

@@ -1,8 +1,8 @@
 using DigitalData.UserManager.Application.DTOs.User;
-using EnvelopeGenerator.Application.Dto.Receiver;
+using EnvelopeGenerator.Application.DTOs.Receiver;
 using static EnvelopeGenerator.Domain.Constants;
 
-namespace EnvelopeGenerator.Application.Dto.EnvelopeHistory;
+namespace EnvelopeGenerator.Application.DTOs.EnvelopeHistory;
 
 /// <summary>
 /// Data Transfer Object representing the history of an envelope, including status, sender, receiver, and related metadata.
@@ -25,7 +25,7 @@ public record EnvelopeHistoryDto
     public required string UserReference { get; set; }
 
     /// <summary>
-    /// Include code of the envelope at this history point.
+    /// Status code of the envelope at this history point.
     /// </summary>
     public int Status { get; set; }
 

EnvelopeGenerator.Application/DTOs/EnvelopeReceiver/EnvelopeReceiverBasicDto.cs

@@ -1,7 +1,7 @@
 using DigitalData.EmailProfilerDispatcher.Abstraction.Attributes;
 using Microsoft.AspNetCore.Mvc;
 
-namespace EnvelopeGenerator.Application.Dto.EnvelopeReceiver;
+namespace EnvelopeGenerator.Application.DTOs.EnvelopeReceiver;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/DTOs/EnvelopeReceiver/EnvelopeReceiverDto.cs

@@ -1,7 +1,7 @@
-using EnvelopeGenerator.Application.Dto.Receiver;
+using EnvelopeGenerator.Application.DTOs.Receiver;
 using Microsoft.AspNetCore.Mvc;
 
-namespace EnvelopeGenerator.Application.Dto.EnvelopeReceiver;
+namespace EnvelopeGenerator.Application.DTOs.EnvelopeReceiver;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/DTOs/EnvelopeReceiver/EnvelopeReceiverSecretDto.cs

@@ -1,6 +1,6 @@
 using Microsoft.AspNetCore.Mvc;
 
-namespace EnvelopeGenerator.Application.Dto.EnvelopeReceiver;
+namespace EnvelopeGenerator.Application.DTOs.EnvelopeReceiver;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/DTOs/EnvelopeReceiverReadOnly/EnvelopeReceiverReadOnlyCreateDto.cs

@@ -2,7 +2,7 @@
 using System.ComponentModel.DataAnnotations;
 using System.Text.Json.Serialization;
 
-namespace EnvelopeGenerator.Application.Dto.EnvelopeReceiverReadOnly;
+namespace EnvelopeGenerator.Application.DTOs.EnvelopeReceiverReadOnly;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/DTOs/EnvelopeReceiverReadOnly/EnvelopeReceiverReadOnlyDto.cs

@@ -1,7 +1,7 @@
-using EnvelopeGenerator.Application.Dto.Receiver;
+using EnvelopeGenerator.Application.DTOs.Receiver;
 using Microsoft.AspNetCore.Mvc;
 
-namespace EnvelopeGenerator.Application.Dto.EnvelopeReceiverReadOnly;
+namespace EnvelopeGenerator.Application.DTOs.EnvelopeReceiverReadOnly;
 
 /// <summary>
 /// Represents a read-only Data Transfer Object (DTO) for an envelope receiver.

EnvelopeGenerator.Application/DTOs/EnvelopeReceiverReadOnly/EnvelopeReceiverReadOnlyUpdateDto.cs

@@ -1,6 +1,6 @@
 using Microsoft.AspNetCore.Mvc;
 
-namespace EnvelopeGenerator.Application.Dto.EnvelopeReceiverReadOnly;
+namespace EnvelopeGenerator.Application.DTOs.EnvelopeReceiverReadOnly;
 
 /// <summary>
 /// Data Transfer Object for updating a read-only envelope receiver.

EnvelopeGenerator.Application/DTOs/EnvelopeTypeDto.cs

@@ -1,6 +1,6 @@
 using Microsoft.AspNetCore.Mvc;
 
-namespace EnvelopeGenerator.Application.Dto;
+namespace EnvelopeGenerator.Application.DTOs;
 
 /// <summary>
 /// Data Transfer Object representing a type of envelope with its configuration settings.

EnvelopeGenerator.Application/DTOs/MappingProfile.cs

@@ -1,13 +1,13 @@
 using AutoMapper;
-using EnvelopeGenerator.Application.Dto.EnvelopeHistory;
-using EnvelopeGenerator.Application.Dto.EnvelopeReceiver;
-using EnvelopeGenerator.Application.Dto.EnvelopeReceiverReadOnly;
-using EnvelopeGenerator.Application.Dto.Messaging;
-using EnvelopeGenerator.Application.Dto.Receiver;
+using EnvelopeGenerator.Application.DTOs.EnvelopeHistory;
+using EnvelopeGenerator.Application.DTOs.EnvelopeReceiver;
+using EnvelopeGenerator.Application.DTOs.EnvelopeReceiverReadOnly;
+using EnvelopeGenerator.Application.DTOs.Messaging;
+using EnvelopeGenerator.Application.DTOs.Receiver;
 using EnvelopeGenerator.Application.Extensions;
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Dto;
+namespace EnvelopeGenerator.Application.DTOs;
 
 /// <summary>
 /// Represents the AutoMapper profile configuration for mapping between
@@ -27,6 +27,7 @@ public class MappingProfile : Profile
         CreateMap<DocumentStatus, DocumentStatusDto>();
         CreateMap<EmailTemplate, EmailTemplateDto>();
         CreateMap<Envelope, EnvelopeDto>();
+        CreateMap<EnvelopeCertificate, EnvelopeCertificateDto>();
         CreateMap<EnvelopeDocument, EnvelopeDocumentDto>();
         CreateMap<Domain.Entities.EnvelopeHistory, EnvelopeHistoryDto>();
         CreateMap<Domain.Entities.EnvelopeHistory, EnvelopeHistoryCreateDto>();
@@ -44,6 +45,7 @@ public class MappingProfile : Profile
         CreateMap<DocumentStatusDto, DocumentStatus>();
         CreateMap<EmailTemplateDto, EmailTemplate>();
         CreateMap<EnvelopeDto, Envelope>();
+        CreateMap<EnvelopeCertificateDto, EnvelopeCertificate>();
         CreateMap<EnvelopeDocumentDto, EnvelopeDocument>();
         CreateMap<EnvelopeHistoryDto, Domain.Entities.EnvelopeHistory>();
         CreateMap<EnvelopeHistoryCreateDto, Domain.Entities.EnvelopeHistory>();

EnvelopeGenerator.Application/DTOs/Messaging/GtxMessagingResponse.cs

@@ -1,6 +1,6 @@
 using Microsoft.AspNetCore.Mvc;
 
-namespace EnvelopeGenerator.Application.Dto.Messaging;
+namespace EnvelopeGenerator.Application.DTOs.Messaging;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/DTOs/Messaging/SmsResponse.cs

@@ -1,6 +1,6 @@
 using Microsoft.AspNetCore.Mvc;
 
-namespace EnvelopeGenerator.Application.Dto.Messaging;
+namespace EnvelopeGenerator.Application.DTOs.Messaging;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/DTOs/Receiver/ReceiverCreateDto.cs

@@ -3,7 +3,7 @@ using System.ComponentModel.DataAnnotations;
 using System.Security.Cryptography;
 using System.Text;
 
-namespace EnvelopeGenerator.Application.Dto.Receiver;
+namespace EnvelopeGenerator.Application.DTOs.Receiver;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/DTOs/Receiver/ReceiverReadDto.cs

@@ -1,8 +1,8 @@
-using EnvelopeGenerator.Application.Dto.EnvelopeReceiver;
+using EnvelopeGenerator.Application.DTOs.EnvelopeReceiver;
 using Microsoft.AspNetCore.Mvc;
 using System.Text.Json.Serialization;
 
-namespace EnvelopeGenerator.Application.Dto.Receiver;
+namespace EnvelopeGenerator.Application.DTOs.Receiver;
 
 /// <summary>
 /// 

EnvelopeGenerator.Application/DTOs/Receiver/ReceiverUpdateDto.cs

@@ -1,6 +1,6 @@
 using Microsoft.AspNetCore.Mvc;
 
-namespace EnvelopeGenerator.Application.Dto.Receiver;
+namespace EnvelopeGenerator.Application.DTOs.Receiver;
 
 /// <summary>
 /// Data Transfer Object for updating a receiver's information.

EnvelopeGenerator.Application/DependencyInjection.cs

@@ -5,9 +5,9 @@ using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.DependencyInjection.Extensions;
 using DigitalData.Core.Client;
 using QRCoder;
-using EnvelopeGenerator.Application.Interfaces.Services;
+using EnvelopeGenerator.Application.Contracts.Services;
 using System.Reflection;
-using EnvelopeGenerator.Application.EnvelopeReceivers.Commands;
+using EnvelopeGenerator.Application.EnvelopeReceivers.Commands.Create;
 
 namespace EnvelopeGenerator.Application;
 
@@ -33,6 +33,7 @@ public static class DependencyInjection
         services.TryAddScoped<IDocumentStatusService, DocumentStatusService>();
         services.TryAddScoped<IEmailTemplateService, EmailTemplateService>();
         services.TryAddScoped<IEnvelopeService, EnvelopeService>();
+        services.TryAddScoped<IEnvelopeCertificateService, EnvelopeCertificateService>();
         services.TryAddScoped<IEnvelopeDocumentService, EnvelopeDocumentService>();
         services.TryAddScoped<IEnvelopeReceiverService, EnvelopeReceiverService>();
         services.TryAddScoped<IEnvelopeTypeService, EnvelopeTypeService>();

EnvelopeGenerator.Application/Documents/Queries/Read/ReadDocumentMappingProfile.cs

@@ -0,0 +1,18 @@
+using AutoMapper;
+using EnvelopeGenerator.Domain.Entities;
+
+namespace EnvelopeGenerator.Application.Documents.Queries.Read;
+
+/// <summary>
+/// 
+/// </summary>
+public class ReadDocumentMappingProfile : Profile
+{
+    /// <summary>
+    /// 
+    /// </summary>
+    public ReadDocumentMappingProfile()
+    {
+        CreateMap<EnvelopeDocument, ReadDocumentResponse>();
+    }
+}

EnvelopeGenerator.Application/Documents/Queries/Read/ReadDocumentQuery.cs

@@ -0,0 +1,12 @@
+using MediatR;
+
+namespace EnvelopeGenerator.Application.Documents.Queries.Read;
+
+/// <summary>
+/// Represents a query to read a document based on its unique identifier or associated envelope identifier.
+/// </summary>
+/// <param name="Id">The unique identifier of the document. Optional.</param>
+/// <param name="EnvelopeId">The identifier of the envelope associated with the document. Optional.</param>
+public record ReadDocumentQuery(int? Id = null, int? EnvelopeId = null) : IRequest<ReadDocumentResponse?>
+{
+}

EnvelopeGenerator.Application/Documents/Queries/Read/ReadDocumentQueryHandler.cs

@@ -1,69 +1,48 @@
 using DigitalData.Core.Abstraction.Application.Repository;
-using EnvelopeGenerator.Application.Dto;
-using MediatR;
 using EnvelopeGenerator.Domain.Entities;
-using Microsoft.EntityFrameworkCore;
-using AutoMapper;
+using MediatR;
 
-namespace EnvelopeGenerator.Application.Documents.Queries;
-
-/// <summary>
-/// Represents a query to read a document based on its unique identifier or associated envelope identifier.
-/// </summary>
-/// <param name="Id">The unique identifier of the document. Optional.</param>
-/// <param name="EnvelopeId">The identifier of the envelope associated with the document. Optional.</param>
-public record ReadDocumentQuery(int? Id = null, int? EnvelopeId = null) : IRequest<EnvelopeDocumentDto?>
-{
-}
+namespace EnvelopeGenerator.Application.Documents.Queries.Read;
 
 /// <summary>
 /// Handles queries for reading <see cref="EnvelopeDocument"/> data based on either the document ID or the envelope ID.
 /// </summary>
-public class ReadDocumentQueryHandler : IRequestHandler<ReadDocumentQuery, EnvelopeDocumentDto?>
+public class ReadDocumentQueryHandler : IRequestHandler<ReadDocumentQuery, ReadDocumentResponse?>
 {
     /// <summary>
     /// Repository for accessing <see cref="EnvelopeDocument"/> entities.
     /// </summary>
     private readonly IRepository<EnvelopeDocument> _repo;
 
-    private readonly IMapper _mapper;
-
     /// <summary>
     /// Initializes a new instance of the <see cref="ReadDocumentQueryHandler"/> class.
     /// </summary>
     /// <param name="envelopeDocumentRepository">The repository used to access <see cref="EnvelopeDocument"/> entities.</param>
-    public ReadDocumentQueryHandler(IRepository<EnvelopeDocument> envelopeDocumentRepository, IMapper mapper)
+    public ReadDocumentQueryHandler(IRepository<EnvelopeDocument> envelopeDocumentRepository)
     {
         _repo = envelopeDocumentRepository;
-        _mapper = mapper;
     }
 
     /// <summary>
-    /// Handles the <see cref="ReadDocumentQuery"/> and returns a <see cref="EnvelopeDocumentDto"/> based on the provided identifiers.
+    /// Handles the <see cref="ReadDocumentQuery"/> and returns a <see cref="ReadDocumentResponse"/> based on the provided identifiers.
     /// </summary>
     /// <param name="query">The query containing the document ID or envelope ID to search for.</param>
     /// <param name="cancellationToken">A token to monitor for cancellation requests.</param>
     /// <returns>
-    /// A <see cref="EnvelopeDocumentDto"/> if a matching document is found; otherwise, <c>null</c>.
+    /// A <see cref="ReadDocumentResponse"/> if a matching document is found; otherwise, <c>null</c>.
     /// </returns>
     /// <exception cref="InvalidOperationException">
     /// Thrown when neither <see cref="ReadDocumentQuery.Id"/> nor <see cref="ReadDocumentQuery.EnvelopeId"/> is provided.
     /// </exception>
     [Obsolete("Use MediatR")]
-    public async Task<EnvelopeDocumentDto?> Handle(ReadDocumentQuery query, CancellationToken cancellationToken)
+    public async Task<ReadDocumentResponse?> Handle(ReadDocumentQuery query, CancellationToken cancellationToken)
     {
         if (query.Id is not null)
-        {
-            var doc = await _repo.ReadOnly().Where(d => d.Id == query.Id).FirstOrDefaultAsync();
-            return _mapper.Map<EnvelopeDocumentDto>(doc);
-        }            
+            return await _repo.ReadOrDefaultAsync<ReadDocumentResponse>(d => d.Id == query.Id);
         else if (query.EnvelopeId is not null)
-        {
-            var doc = await _repo.ReadOnly().Where(d => d.EnvelopeId == query.EnvelopeId).FirstOrDefaultAsync();
-            return _mapper.Map<EnvelopeDocumentDto>(doc);
-        }
+            return await _repo.ReadOrDefaultAsync<ReadDocumentResponse>(d => d.EnvelopeId == query.EnvelopeId);
 
         throw new InvalidOperationException(
             $"Invalid {nameof(ReadDocumentQuery)}: either {nameof(query.Id)} or {nameof(query.EnvelopeId)} must be provided.");
     }
-}
+}

EnvelopeGenerator.Application/Documents/Queries/Read/ReadDocumentResponse.cs

@@ -0,0 +1,12 @@
+namespace EnvelopeGenerator.Application.Documents.Queries.Read;
+
+/// <summary>
+/// Represents the response for reading a document.
+/// </summary>
+public class ReadDocumentResponse : ReadDocumentResponseBase
+{
+    /// <summary>
+    /// The binary data of the document, if available.
+    /// </summary>
+    public byte[]? ByteData { get; init; }
+}

EnvelopeGenerator.Application/Documents/Queries/Read/ReadDocumentResponseBase.cs

@@ -0,0 +1,22 @@
+namespace EnvelopeGenerator.Application.Documents.Queries.Read;
+
+/// <summary>
+/// Represents the response for reading a document.
+/// </summary>
+public class ReadDocumentResponseBase
+{
+    /// <summary>
+    /// The unique identifier of the document.
+    /// </summary>
+    public int Guid { get; init; }
+
+    /// <summary>
+    /// The identifier of the associated envelope.
+    /// </summary>
+    public int EnvelopeId { get; init; }
+
+    /// <summary>
+    /// The date and time when the document was added.
+    /// </summary>
+    public DateTime AddedWhen { get; init; }
+}

EnvelopeGenerator.Application/EmailTemplates/Commands/Reset/ResetEmailTemplateCommandHandler.cs

@@ -1,9 +1,7 @@
 using DigitalData.Core.Abstraction.Application.Repository;
-using EnvelopeGenerator.Application.Dto;
+using EnvelopeGenerator.Application.DTOs;
 using EnvelopeGenerator.Domain.Entities;
 using MediatR;
-using Microsoft.EntityFrameworkCore;
-using System.Linq;
 
 namespace EnvelopeGenerator.Application.EmailTemplates.Commands.Reset;
 
@@ -33,10 +31,10 @@ public class ResetEmailTemplateCommandHandler : IRequestHandler<ResetEmailTempla
     public async Task Handle(ResetEmailTemplateCommand request, CancellationToken cancel)
     {
         var temps = request.Id is not null
-            ? await _repository.ReadOnly().Where(t => t.Id == request.Id).ToListAsync(cancel)
+            ? await _repository.ReadAllAsync<EmailTemplateDto>(t => t.Id == request.Id, cancel)
             : request.Type is not null
-                ? await _repository.ReadOnly().Where(t => t.Name == request.Type.ToString()).ToListAsync(cancel)
-                : await _repository.ReadOnly().ToListAsync(cancel);
+                ? await _repository.ReadAllAsync<EmailTemplateDto>(t => t.Name == request.Type.ToString(), cancel)
+                : await _repository.ReadAllAsync<EmailTemplateDto>(cancellation: cancel);
 
         foreach (var temp in temps)
         {
@@ -84,7 +82,7 @@ public class ResetEmailTemplateCommandHandler : IRequestHandler<ResetEmailTempla
         new(){
         Id = 6,
         Name = "DocumentRejected_ADM",
-        Body = "Guten Tag [NAME_SENDER],<p><B><I>[NAME_RECEIVER]</I></B> hat den Umschlag <B><I>'[DOCUMENT_TITLE]'</I></B> mit folgendem Grund abgelehnt: <p>\r\n[REASON] \r\n<p>Der Umschlag wurde auf den Include Rejected gesetzt. <p> \r\nMit freundlichen Grüßen<br />\r\n<br />\r\n[NAME_PORTAL]",
+        Body = "Guten Tag [NAME_SENDER],<p><B><I>[NAME_RECEIVER]</I></B> hat den Umschlag <B><I>'[DOCUMENT_TITLE]'</I></B> mit folgendem Grund abgelehnt: <p>\r\n[REASON] \r\n<p>Der Umschlag wurde auf den Status Rejected gesetzt. <p> \r\nMit freundlichen Grüßen<br />\r\n<br />\r\n[NAME_PORTAL]",
         Subject = "'[DOCUMENT_TITLE]' - Unterzeichnungsvorgang zurückgezogen"
         },
         new(){

EnvelopeGenerator.Application/EmailTemplates/Commands/Update/UpdateEmailTemplateCommandHandler.cs

@@ -1,11 +1,9 @@
-using AutoMapper;
-using DigitalData.Core.Abstraction.Application.Repository;
-using EnvelopeGenerator.Application.Dto;
+using DigitalData.Core.Abstraction.Application.Repository;
+using EnvelopeGenerator.Application.DTOs;
 using EnvelopeGenerator.Application.Exceptions;
 using EnvelopeGenerator.Domain;
 using EnvelopeGenerator.Domain.Entities;
 using MediatR;
-using Microsoft.EntityFrameworkCore;
 
 namespace EnvelopeGenerator.Application.EmailTemplates.Commands.Update;
 
@@ -15,17 +13,14 @@ namespace EnvelopeGenerator.Application.EmailTemplates.Commands.Update;
 public class UpdateEmailTemplateCommandHandler : IRequestHandler<UpdateEmailTemplateCommand>
 {
     private readonly IRepository<EmailTemplate> _repository;
-    
-    private readonly IMapper _mapper;
 
     /// <summary>
     /// 
     /// </summary>
     /// <param name="repository"></param>
-    public UpdateEmailTemplateCommandHandler(IRepository<EmailTemplate> repository, IMapper mapper)
+    public UpdateEmailTemplateCommandHandler(IRepository<EmailTemplate> repository)
     {
         _repository = repository;
-        _mapper = mapper;
     }
 
     /// <summary>
@@ -39,34 +34,32 @@ public class UpdateEmailTemplateCommandHandler : IRequestHandler<UpdateEmailTemp
     [Obsolete("Use Read-method returning IReadQuery<TEntity> instead.")]
     public async Task Handle(UpdateEmailTemplateCommand request, CancellationToken cancel)
     {
-        EmailTemplateDto? tempDto;
+        EmailTemplateDto? temp;
 
         if (request.EmailTemplateQuery?.Id is int id)
         {
-            var temp = await _repository.ReadOnly().Where(t => t.Id == id).FirstOrDefaultAsync(cancel);
-            tempDto = _mapper.Map<EmailTemplateDto>(temp);
+            temp = await _repository.ReadOrDefaultAsync<EmailTemplateDto>(t => t.Id == id, single: false, cancel);
         }
         else if (request!.EmailTemplateQuery!.Type is Constants.EmailTemplateType type)
         {
-            var temp = await _repository.ReadOnly().Where(t => t.Name == type.ToString()).FirstOrDefaultAsync(cancel);
-            tempDto = _mapper.Map<EmailTemplateDto>(temp);
+            temp = await _repository.ReadOrDefaultAsync<EmailTemplateDto>(t => t.Name == type.ToString(), single: false, cancel);
         }
         else
         {
             throw new InvalidOperationException("Both id and type is null. Id: " + request.EmailTemplateQuery.Id +". Type: " + request.EmailTemplateQuery.Type.ToString());
         }
 
-        if (tempDto == null)
+        if (temp == null)
         {
             throw new NotFoundException();
         }
 
         if (request.Body is not null)
-            tempDto.Body = request.Body;
+            temp.Body = request.Body;
 
         if (request.Subject is not null)
-            tempDto.Subject = request.Subject;
+            temp.Subject = request.Subject;
 
-        await _repository.UpdateAsync(tempDto, t => t.Id == tempDto.Id, cancel);
+        await _repository.UpdateAsync(temp, t => t.Id == temp.Id, cancel);
     }
 }

EnvelopeGenerator.Application/EmailTemplates/Queries/Read/ReadEmailTemplateMappingProfile.cs

@@ -1,5 +1,4 @@
 using AutoMapper;
-using EnvelopeGenerator.Application.EmailTemplates.Queries.Read;
 using EnvelopeGenerator.Domain.Entities;
 using System;
 using System.Collections.Generic;
@@ -7,17 +6,17 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace EnvelopeGenerator.Application.EmailTemplates;
+namespace EnvelopeGenerator.Application.EmailTemplates.Queries.Read;
 
 /// <summary>
 /// 
 /// </summary>
-public class MappingProfile : Profile
+public class ReadEmailTemplateMappingProfile : Profile
 {
     /// <summary>
     /// 
     /// </summary>
-    public MappingProfile()
+    public ReadEmailTemplateMappingProfile()
     {
         CreateMap<EmailTemplate, ReadEmailTemplateResponse>();
     }

EnvelopeGenerator.Application/EmailTemplates/Queries/Read/ReadEmailTemplateQueryHandler.cs

@@ -1,5 +1,5 @@
 using AutoMapper;
-using EnvelopeGenerator.Application.Interfaces.Repositories;
+using EnvelopeGenerator.Application.Contracts.Repositories;
 using EnvelopeGenerator.Domain;
 using MediatR;
 

EnvelopeGenerator.Application/EnvelopeGenerator.Application.csproj

@@ -14,28 +14,17 @@
 
 	<ItemGroup>
 		<PackageReference Include="Dapper" Version="2.1.66" />
-		<PackageReference Include="DigitalData.Core.Abstraction.Application" Version="1.1.0" />
-		<PackageReference Include="DigitalData.Core.Application" Version="3.4.0" />
+		<PackageReference Include="DigitalData.Core.Abstraction.Application" Version="1.0.0" />
+		<PackageReference Include="DigitalData.Core.Application" Version="3.3.4" />
 		<PackageReference Include="DigitalData.Core.Client" Version="2.1.0" />
 		<PackageReference Include="DigitalData.EmailProfilerDispatcher" Version="3.1.1" />
 		<PackageReference Include="MediatR" Version="12.5.0" />
 		<PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="7.0.18" />
+		<PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="9.0.5" />
 		<PackageReference Include="Otp.NET" Version="1.4.0" />
 		<PackageReference Include="QRCoder" Version="1.6.0" />
 		<PackageReference Include="QRCoder-ImageSharp" Version="0.10.0" />
-		<PackageReference Include="UserManager" Version="1.1.3" />
-	</ItemGroup>
-
-	<ItemGroup Condition="'$(TargetFramework)' == 'net7.0'">
-		<PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.0" />
-	</ItemGroup>
-
-	<ItemGroup Condition="'$(TargetFramework)' == 'net8.0'">
-		<PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="9.0.5" />
-	</ItemGroup>
-
-	<ItemGroup Condition="'$(TargetFramework)' == 'net9.0'">
-		<PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="9.0.5" />
+		<PackageReference Include="UserManager" Version="1.1.1" />
 	</ItemGroup>
 
 	<ItemGroup>

EnvelopeGenerator.Application/EnvelopeReceivers/Commands/Create/CreateEnvelopeReceiverCommand.cs

@@ -0,0 +1,21 @@
+using EnvelopeGenerator.Application.Envelopes.Commands;
+using MediatR;
+using System.ComponentModel.DataAnnotations;
+
+namespace EnvelopeGenerator.Application.EnvelopeReceivers.Commands.Create;
+
+/// <summary>
+/// Befehl zur Erstellung eines Umschlags.
+/// </summary>
+/// <param name="Title">Der Titel des Umschlags. Dies ist ein Pflichtfeld.</param>
+/// <param name="Message">Die Nachricht, die im Umschlag enthalten sein soll. Dies ist ein Pflichtfeld.</param>
+/// <param name="Document">Das mit dem Umschlag verknüpfte Dokument. Dies ist ein Pflichtfeld.</param>
+/// <param name="Receivers">Eine Sammlung von Empfängern, die den Umschlag erhalten. Dies ist ein Pflichtfeld.</param>
+/// <param name="TFAEnabled">Gibt an, ob die Zwei-Faktor-Authentifizierung für den Umschlag aktiviert ist. Standardmäßig false.</param>
+public record CreateEnvelopeReceiverCommand(
+    [Required] string Title,
+    [Required] string Message,
+    [Required] DocumentCreateCommand Document,
+    [Required] IEnumerable<ReceiverGetOrCreateCommand> Receivers,
+    bool TFAEnabled = false
+    ) : CreateEnvelopeCommand(Title, Message, TFAEnabled), IRequest<CreateEnvelopeReceiverResponse>;

EnvelopeGenerator.Application/EnvelopeReceivers/Commands/Create/CreateEnvelopeReceiverCommandHandler.cs

@@ -1,10 +1,10 @@
 using AutoMapper;
-using EnvelopeGenerator.Application.Interfaces.SQLExecutor;
-using EnvelopeGenerator.Application.Dto.Receiver;
+using EnvelopeGenerator.Application.Contracts.SQLExecutor;
+using EnvelopeGenerator.Application.DTOs.Receiver;
 using EnvelopeGenerator.Domain.Entities;
 using MediatR;
 
-namespace EnvelopeGenerator.Application.EnvelopeReceivers.Commands;
+namespace EnvelopeGenerator.Application.EnvelopeReceivers.Commands.Create;
 
 /// <summary>
 /// Handles the creation of an envelope along with its associated document and recipients.

EnvelopeGenerator.Application/EnvelopeReceivers/Commands/Create/CreateEnvelopeReceiverDtos.cs

@@ -1,26 +1,13 @@
-using EnvelopeGenerator.Application.Envelopes.Commands;
-using MediatR;
+using System;
+using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
 
-namespace EnvelopeGenerator.Application.EnvelopeReceivers.Commands;
+namespace EnvelopeGenerator.Application.EnvelopeReceivers.Commands.Create;
 
-/// <summary>
-/// Befehl zur Erstellung eines Umschlags.
-/// </summary>
-/// <param name="Title">Der Titel des Umschlags. Dies ist ein Pflichtfeld.</param>
-/// <param name="Message">Die Nachricht, die im Umschlag enthalten sein soll. Dies ist ein Pflichtfeld.</param>
-/// <param name="Document">Das mit dem Umschlag verknüpfte Dokument. Dies ist ein Pflichtfeld.</param>
-/// <param name="Receivers">Eine Sammlung von Empfängern, die den Umschlag erhalten. Dies ist ein Pflichtfeld.</param>
-/// <param name="TFAEnabled">Gibt an, ob die Zwei-Faktor-Authentifizierung für den Umschlag aktiviert ist. Standardmäßig false.</param>
-public record CreateEnvelopeReceiverCommand(
-    [Required] string Title,
-    [Required] string Message,
-    [Required] DocumentCreateCommand Document,
-    [Required] IEnumerable<ReceiverGetOrCreateCommand> Receivers,
-    bool TFAEnabled = false
-    ) : CreateEnvelopeCommand(Title, Message, TFAEnabled), IRequest<CreateEnvelopeReceiverResponse>;
-
-#region Subcommands
+#region DTOs
 /// <summary>
 /// Signaturposition auf einem Dokument.
 /// </summary>

EnvelopeGenerator.Application/EnvelopeReceivers/Commands/Create/CreateEnvelopeReceiverMappingProfile.cs

@@ -0,0 +1,21 @@
+using AutoMapper;
+using EnvelopeGenerator.Application.DTOs.Receiver;
+using EnvelopeGenerator.Application.Envelopes.Commands;
+using EnvelopeGenerator.Domain.Entities;
+
+namespace EnvelopeGenerator.Application.EnvelopeReceivers.Commands.Create;
+
+/// <summary>
+/// 
+/// </summary>
+public class CreateEnvelopeReceiverMappingProfile : Profile
+{
+    /// <summary>
+    /// 
+    /// </summary>
+    public CreateEnvelopeReceiverMappingProfile()
+    {
+        CreateMap<Envelope, CreateEnvelopeResponse>();
+        CreateMap<Receiver, ReceiverReadDto>();
+    }
+}

EnvelopeGenerator.Application/EnvelopeReceivers/Commands/Create/CreateEnvelopeReceiverResponse.cs

@@ -0,0 +1,39 @@
+using DigitalData.UserManager.Domain.Entities;
+using EnvelopeGenerator.Application.DTOs.Receiver;
+using EnvelopeGenerator.Application.Envelopes.Commands;
+
+namespace EnvelopeGenerator.Application.EnvelopeReceivers.Commands.Create;
+
+/// <summary>
+/// 
+/// </summary>
+public record CreateEnvelopeReceiverResponse : CreateEnvelopeResponse
+{
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="Id"></param>
+    /// <param name="UserId"></param>
+    /// <param name="Status"></param>
+    /// <param name="Uuid"></param>
+    /// <param name="Message"></param>
+    /// <param name="AddedWhen"></param>
+    /// <param name="ChangedWhen"></param>
+    /// <param name="Title"></param>
+    /// <param name="Language"></param>
+    /// <param name="TFAEnabled"></param>
+    /// <param name="User"></param>
+    public CreateEnvelopeReceiverResponse(int Id, int UserId, int Status, string Uuid, string? Message, DateTime AddedWhen, DateTime? ChangedWhen, string? Title, string Language, bool TFAEnabled, User User) : base(Id, UserId, Status, Uuid, Message, AddedWhen, ChangedWhen, Title, Language, TFAEnabled, User)
+    {
+    }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public IEnumerable<ReceiverReadDto> SentReceiver { get; set; } = new List<ReceiverReadDto>();
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public IEnumerable<ReceiverGetOrCreateCommand> UnsentReceivers { get; set; } = new List<ReceiverGetOrCreateCommand>();
+}

EnvelopeGenerator.Application/EnvelopeReceivers/Commands/CreateEnvelopeReceiverResponse.cs

@@ -1,20 +0,0 @@
-using EnvelopeGenerator.Application.Dto;
-using EnvelopeGenerator.Application.Dto.Receiver;
-
-namespace EnvelopeGenerator.Application.EnvelopeReceivers.Commands;
-
-/// <summary>
-/// 
-/// </summary>
-public record CreateEnvelopeReceiverResponse : EnvelopeDto
-{
-    /// <summary>
-    /// 
-    /// </summary>
-    public IEnumerable<ReceiverReadDto> SentReceiver { get; set; } = new List<ReceiverReadDto>();
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public IEnumerable<ReceiverGetOrCreateCommand> UnsentReceivers { get; set; } = new List<ReceiverGetOrCreateCommand>();
-}

EnvelopeGenerator.Application/EnvelopeReceivers/EnvelopeReceiverQuery.cs

@@ -1,32 +1,16 @@
-using MediatR;
-using EnvelopeGenerator.Domain;
+using EnvelopeGenerator.Application.Histories;
 
-namespace EnvelopeGenerator.Application.Envelopes.Queries;
+namespace EnvelopeGenerator.Application.EnvelopeReceivers;
 
 /// <summary>
-/// Repräsentiert eine Abfrage für Umschläge.
+/// Stellt eine Abfrage für einen Envelope-Empfänger dar.
 /// </summary>
-public class ReadEnvelopeQuery : IRequest
-{
-    /// <summary>
-    /// Die eindeutige Kennung des Umschlags.
-    /// </summary>
-    public int? Id { get; init; }
-
-    /// <summary>
-    /// Die universell eindeutige Kennung des Umschlags.
-    /// </summary>
-    public string? Uuid { get; init; }
-
-    /// <summary>
-    /// Abfrage des Include des Umschlags
-    /// </summary>
-    public EnvelopeStatus? Status { get; init; }
-}
+/// <param name="Status">Der Status der Abfrage, optional.</param>
+public record EnvelopeReceiverQuery(EnvelopeStatusQuery? Status = null);
 
 /// <summary>
-/// Repräsentiert den Include eines Umschlags und dessen Beziehung zum Empfänger. (vgl. auch <see cref="Constants.EnvelopeStatus"/>
-/// Invalid (0): Ungültiger Include.
+/// Repräsentiert den Status eines Umschlags und dessen Beziehung zum Empfänger. (vgl. auch <see cref="Common.Constants.EnvelopeStatus"/>
+/// Invalid (0): Ungültiger Status.
 /// EnvelopeCreated (1001): Der Umschlag wurde erstellt.
 /// EnvelopeSaved (1002): Der Umschlag wurde gespeichert.
 /// EnvelopeQueued (1003): Der Umschlag wurde zur Verarbeitung eingeplant.
@@ -51,26 +35,13 @@ public class ReadEnvelopeQuery : IRequest
 /// MessageConfirmationSent (3003): Bestätigungsnachricht wurde gesendet.
 /// MessageDeletionSent (3004): Löschbenachrichtigung wurde gesendet.
 /// MessageCompletionSent (3005): Abschlussbenachrichtigung wurde gesendet.
+/// <param name="Min">Der minimale Statuswert, der berücksichtigt werden soll.</param>
+/// <param name="Max">Der maximale Statuswert, der berücksichtigt werden soll.</param>
+/// <param name="Ignore">Eine Liste von Statuswerten, die ignoriert werden sollen.</param>
 /// </summary>
-public record EnvelopeStatus
+public record EnvelopeStatusQuery(
+    int? Min = null,
+    int? Max = null,
+    int[]? Ignore = null)
 {
-    /// <summary>
-    /// Der minimale Statuswert, der berücksichtigt werden.
-    /// </summary>
-    public Constants.EnvelopeStatus? Min { get; init; }
-
-    /// <summary>
-    /// Der maximale Statuswert, der berücksichtigt werden.
-    /// </summary>
-    public Constants.EnvelopeStatus? Max { get; init; }
-
-    /// <summary>
-    /// Eine Liste von Statuswerten, die einbezogen werden.
-    /// </summary>
-    public Constants.EnvelopeStatus[]? Include { get; init; }
-
-    /// <summary>
-    /// Eine Liste von Statuswerten, die ignoriert werden werden.
-    /// </summary>
-    public Constants.EnvelopeStatus[]? Ignore { get; init; }
-}
+}

EnvelopeGenerator.Application/EnvelopeReceivers/MappingProfile.cs

@@ -1,20 +0,0 @@
-using AutoMapper;
-using EnvelopeGenerator.Application.Dto.Receiver;
-using EnvelopeGenerator.Application.Envelopes.Commands;
-using EnvelopeGenerator.Domain.Entities;
-
-namespace EnvelopeGenerator.Application.EnvelopeReceivers;
-
-/// <summary>
-/// 
-/// </summary>
-public class MappingProfile : Profile
-{
-    /// <summary>
-    /// 
-    /// </summary>
-    public MappingProfile()
-    {
-        CreateMap<Receiver, ReceiverReadDto>();
-    }
-}

EnvelopeGenerator.Application/EnvelopeReceivers/Queries/Read/ReadEnvelopeReceiverQuery.cs

@@ -0,0 +1,30 @@
+using EnvelopeGenerator.Application.Histories;
+using EnvelopeGenerator.Application.Envelopes.Queries.Read;
+using EnvelopeGenerator.Application.Receivers.Queries.Read;
+using MediatR;
+
+namespace EnvelopeGenerator.Application.EnvelopeReceivers.Queries.Read;
+
+/// <summary>
+/// Repräsentiert eine Abfrage zum Lesen eines Envelope-Empfängers.
+/// </summary>
+/// <remarks>
+/// Diese Abfrage kombiniert Informationen über einen Umschlag (<see cref="ReadEnvelopeQuery"/>) 
+/// und einen Empfänger (<see cref="ReadReceiverQuery"/>), um eine vollständige Antwort 
+/// (<see cref="ReadEnvelopeReceiverResponse"/>) zu generieren. 
+/// Die Antwort enthält Details wie den Status, die Zuordnung zwischen Umschlag und Empfänger 
+/// sowie zusätzliche Metadaten.
+/// </remarks>
+/// <param name="Status">Umschlag oder Empfängerstatus.</param>
+public record ReadEnvelopeReceiverQuery(EnvelopeStatusQuery? Status = null) : EnvelopeReceiverQuery(Status), IRequest<ReadEnvelopeReceiverResponse>
+{
+    /// <summary>
+    /// Der Umschlag, der mit dem Empfänger verknüpft ist.
+    /// </summary>
+    public ReadEnvelopeQuery? Envelope { get; init; }
+
+    /// <summary>
+    /// Der Empfänger, der mit dem Umschlag verknüpft ist.
+    /// </summary>
+    public ReadReceiverQuery? Receiver { get; init; }
+};

EnvelopeGenerator.Application/EnvelopeReceivers/Queries/Read/ReadEnvelopeReceiverResponse.cs

@@ -0,0 +1,94 @@
+using DigitalData.EmailProfilerDispatcher.Abstraction.Attributes;
+using EnvelopeGenerator.Application.Envelopes.Queries.Read;
+using EnvelopeGenerator.Application.Receivers.Queries.Read;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace EnvelopeGenerator.Application.EnvelopeReceivers.Queries.Read;
+
+/// <summary>
+/// Repräsentiert die Antwort für das Lesen eines Envelope-Empfängers.
+/// </summary>
+/// <remarks>
+/// Diese Klasse enthält Informationen über einen spezifischen Empfänger eines Umschlags (Envelope).
+/// Sie verknüpft die Empfängerinformationen mit den zugehörigen Umschlagsdaten und bietet zusätzliche Metadaten.
+/// </remarks>
+/// <param name="UserId">Die eindeutige Kennung des Benutzers, der den Empfänger erstellt hat.</param>
+/// <param name="Status">Der Status des Empfängers als numerischer Wert.</param>
+public record ReadEnvelopeReceiverResponse(int UserId, int Status)
+{
+    /// <summary>
+    /// Gibt die zusammengesetzte Kennung des Empfängers zurück, bestehend aus der Umschlags-ID und der Empfänger-ID.
+    /// </summary>
+    /// <remarks>
+    /// Diese Eigenschaft kombiniert die eindeutige Kennung des Umschlags (EnvelopeId) und die des Empfängers (ReceiverId) 
+    /// zu einer einzigen, leicht zugänglichen Struktur.
+    /// </remarks>
+    [NotMapped]
+    public (int Envelope, int Receiver) Id => (Envelope: EnvelopeId, Receiver: ReceiverId);
+
+    /// <summary>
+    /// Die eindeutige Kennung des zugehörigen Umschlags.
+    /// </summary>
+    [Required]
+    public int EnvelopeId { get; init; }
+
+    /// <summary>
+    /// Die eindeutige Kennung des Empfängers.
+    /// </summary>
+    [Required]
+    public int ReceiverId { get; init; }
+
+    /// <summary>
+    /// Die Reihenfolge des Empfängers innerhalb des Umschlags.
+    /// </summary>
+    public int Sequence { get; init; }
+
+    /// <summary>
+    /// Der Name des Empfängers. Kann als Platzhalter verwendet werden.
+    /// </summary>
+    [TemplatePlaceholder("[NAME_RECEIVER]")]
+    public string? Name { get; init; }
+
+    /// <summary>
+    /// Die Berufsbezeichnung des Empfängers.
+    /// </summary>
+    public string? JobTitle { get; init; }
+
+    /// <summary>
+    /// Der Firmenname des Empfängers.
+    /// </summary>
+    public string? CompanyName { get; init; }
+
+    /// <summary>
+    /// Eine private Nachricht, die mit dem Empfänger verknüpft ist.
+    /// </summary>
+    public string? PrivateMessage { get; init; }
+
+    /// <summary>
+    /// Das Datum und die Uhrzeit, wann der Empfänger hinzugefügt wurde.
+    /// </summary>
+    public DateTime AddedWhen { get; init; }
+
+    /// <summary>
+    /// Das Datum und die Uhrzeit, wann der Empfänger zuletzt geändert wurde (falls vorhanden).
+    /// </summary>
+    public DateTime? ChangedWhen { get; init; }
+
+    /// <summary>
+    /// Gibt an, ob der Empfänger eine Telefonnummer hat.
+    /// </summary>
+    public bool HasPhoneNumber { get; init; }
+
+    /// <summary>
+    /// Die zugehörigen Umschlagsdaten.
+    /// </summary>
+    [Required]
+    public required ReadEnvelopeResponse Envelope { get; init; }
+
+    /// <summary>
+    /// Die Liste der Empfängerinformationen.
+    /// </summary>
+    [Required]
+    public IEnumerable<ReadReceiverResponse> Receiver { get; init; } = new List<ReadReceiverResponse>();
+}

EnvelopeGenerator.Application/EnvelopeReceivers/Queries/ReadEnvelopeReceiverQuery.cs

@@ -1,104 +0,0 @@
-using EnvelopeGenerator.Application.Dto.EnvelopeReceiver;
-using EnvelopeGenerator.Application.Envelopes.Queries;
-using EnvelopeGenerator.Application.Exceptions;
-using EnvelopeGenerator.Application.Extensions;
-using EnvelopeGenerator.Application.Receivers.Queries;
-using EnvelopeGenerator.Extensions;
-using MediatR;
-
-namespace EnvelopeGenerator.Application.EnvelopeReceivers.Queries;
-
-/// <summary>
-/// Repräsentiert eine Abfrage zum Lesen eines Envelope-Empfängers.
-/// Invalid (0): Ungültiger Include.
-/// EnvelopeCreated (1001): Der Umschlag wurde erstellt.
-/// EnvelopeSaved (1002): Der Umschlag wurde gespeichert.
-/// EnvelopeQueued (1003): Der Umschlag wurde zur Verarbeitung eingeplant.
-/// EnvelopeSent (1004): Der Umschlag wurde versendet. (Nicht verwendet)
-/// EnvelopePartlySigned (1005): Der Umschlag wurde teilweise unterschrieben.
-/// EnvelopeCompletelySigned (1006): Der Umschlag wurde vollständig unterschrieben.
-/// EnvelopeReportCreated (1007): Ein Abschlussbericht wurde für den Umschlag erstellt.
-/// EnvelopeArchived (1008): Der Umschlag wurde archiviert.
-/// EnvelopeDeleted (1009): Der Umschlag wurde gelöscht.
-/// AccessCodeRequested (2001): Der Zugriffscode wurde angefordert.
-/// AccessCodeCorrect (2002): Der Zugriffscode war korrekt.
-/// AccessCodeIncorrect (2003): Der Zugriffscode war falsch.
-/// DocumentOpened (2004): Das Dokument wurde geöffnet.
-/// DocumentSigned (2005): Ein Dokument wurde unterschrieben.
-/// SignatureConfirmed (2006): Die Signatur wurde bestätigt.
-/// DocumentRejected (2007): Ein Dokument wurde abgelehnt.
-/// EnvelopeShared (2008): Der Umschlag wurde geteilt.
-/// EnvelopeViewed (2009): Der Umschlag wurde angesehen.
-/// DocumentForwarded (4001): Das Dokument wurde weitergeleitet.
-/// MessageInvitationSent (3001): Einladung wurde gesendet (vom Trigger verwendet).
-/// MessageAccessCodeSent (3002): Zugriffscode wurde gesendet.
-/// MessageConfirmationSent (3003): Bestätigungsnachricht wurde gesendet.
-/// MessageDeletionSent (3004): Löschbenachrichtigung wurde gesendet.
-/// MessageCompletionSent (3005): Abschlussbenachrichtigung wurde gesendet.
-/// </summary>
-/// <remarks>
-/// Diese Abfrage kombiniert Informationen über einen Umschlag (<see cref="ReadEnvelopeQuery"/>) 
-/// und einen Empfänger (<see cref="ReadReceiverQuery"/>), um eine vollständige Antwort 
-/// (<see cref="EnvelopeReceiverDto"/>) zu generieren. 
-/// Die Antwort enthält Details wie den Include, die Zuordnung zwischen Umschlag und Empfänger 
-/// sowie zusätzliche Metadaten.
-/// </remarks>
-public record ReadEnvelopeReceiverQuery : IRequest<IEnumerable<EnvelopeReceiverDto>>
-{
-    /// <summary>
-    /// 
-    /// </summary>
-    public string? Key
-    { 
-        get => Envelope?.Uuid is string uuid && Receiver?.Signature is string signature
-                ? (uuid, signature).EncodeEnvelopeReceiverId()
-                : null;
-        init
-        {
-            if (value is null)
-                return;
-
-            (string? EnvelopeUuid, string? ReceiverSignature)  = value.DecodeEnvelopeReceiverId();
-            if(string.IsNullOrEmpty(EnvelopeUuid) || string.IsNullOrEmpty(ReceiverSignature))
-            {
-                throw new BadRequestException("Der EnvelopeReceiverKey muss ein gültiger Base64-kodierter String sein, der die EnvelopeUuid und die ReceiverSignature enthält.");
-            }
-            Envelope = new ReadEnvelopeQuery()
-            {
-                Uuid = EnvelopeUuid
-            };
-            Receiver = new ReadReceiverQuery()
-            {
-                Signature = ReceiverSignature
-            };
-        }
-    }
-
-    /// <summary>
-    /// Der Umschlag, der mit dem Empfänger verknüpft ist.
-    /// </summary>
-    public ReadEnvelopeQuery? Envelope { get; set; }
-
-    /// <summary>
-    /// Der Empfänger, der mit dem Umschlag verknüpft ist.
-    /// </summary>
-    public ReadReceiverQuery? Receiver { get; set; }
-};
-
-/// <summary>
-/// 
-/// </summary>
-public static class Extensions
-{
-    /// <summary>
-    /// 
-    /// </summary>
-    /// <param name="mediator"></param>
-    /// <param name="key"></param>
-    /// <returns></returns>
-    public static Task<EnvelopeReceiverDto?> ReadEnvelopeReceiverAsync(this IMediator mediator, string key, CancellationToken cancel = default)
-    {
-        var q = new ReadEnvelopeReceiverQuery() { Key = key };
-        return mediator.Send(q, cancel).Then(envRcvs => envRcvs.FirstOrDefault());
-    }
-}

EnvelopeGenerator.Application/EnvelopeReceivers/Queries/ReadEnvelopeReceiverQueryHandler.cs

@@ -1,87 +0,0 @@
-using AutoMapper;
-using DigitalData.Core.Abstraction.Application.Repository;
-using EnvelopeGenerator.Application.Dto.EnvelopeReceiver;
-using EnvelopeGenerator.Domain.Entities;
-using MediatR;
-using Microsoft.EntityFrameworkCore;
-
-namespace EnvelopeGenerator.Application.EnvelopeReceivers.Queries;
-
-/// <summary>
-/// 
-/// </summary>
-public class ReadEnvelopeReceiverQueryHandler : IRequestHandler<ReadEnvelopeReceiverQuery, IEnumerable<EnvelopeReceiverDto>>
-{
-    private readonly IRepository<EnvelopeReceiver> _repo;
-
-    private readonly IMapper _mapper;
-
-    /// <summary>
-    /// 
-    /// </summary>
-    /// <param name="envelopeReceiver"></param>
-    /// <param name="mapper"></param>
-    public ReadEnvelopeReceiverQueryHandler(IRepository<EnvelopeReceiver> envelopeReceiver, IMapper mapper)
-    {
-        _repo = envelopeReceiver;
-        _mapper = mapper;
-    }
-
-    /// <summary>
-    /// 
-    /// </summary>
-    /// <param name="request"></param>
-    /// <param name="cancel"></param>
-    /// <returns></returns>
-    /// <exception cref="NotImplementedException"></exception>
-    public async Task<IEnumerable<EnvelopeReceiverDto>> Handle(ReadEnvelopeReceiverQuery request, CancellationToken cancel)
-    {
-        var q = _repo.Read();
-
-        if(request.Envelope is not null)
-        {
-            var env = request.Envelope;
-            if (env.Id is not null)
-                q = q.Where(er => er.EnvelopeId == env.Id);
-
-            if (env.Status is not null)
-            {
-                if(env.Status.Min is not null)
-                    q = q.Where(er => er.Envelope.Status >= env.Status.Min);
-
-                if(env.Status.Max is not null)
-                    q = q.Where(er => er.Envelope.Status <= env.Status.Max);
-
-                if(env.Status .Include?.Length > 0)
-                    q = q.Where(er => env.Status.Include.Contains(er.Envelope.Status));
-
-                if(env.Status.Ignore is not null)
-                    q = q.Where(er => !env.Status.Ignore.Contains(er.Envelope.Status));
-            }
-
-            if (env.Uuid is not null)
-                q = q.Where(er => er.Envelope.Uuid == env.Uuid);
-        }
-
-        if (request.Receiver is not null)
-        {
-            var rcv = request.Receiver;
-            if (rcv.Id is not null)
-                q = q.Where(r => r.ReceiverId == rcv.Id);
-
-            if (rcv.EmailAddress is not null)
-                q = q.Where(r => r.Receiver.EmailAddress == rcv.EmailAddress);
-
-            if (rcv.Signature is not null)
-                q = q.Where(er => er.Receiver.Signature == rcv.Signature);
-        }
-
-        var envRcvs = await q.Include(er => er.Envelope).ThenInclude(e => e.Documents).ThenInclude(d => d.Elements)
-                        .Include(er => er.Envelope).ThenInclude(e => e.History)
-                        .Include(er => er.Envelope).ThenInclude(e => e.User)
-                        .Include(er => er.Receiver)
-                        .ToListAsync(cancel);
-
-        return _mapper.Map<IEnumerable<EnvelopeReceiverDto>>(envRcvs);
-    } 
-}

EnvelopeGenerator.Application/EnvelopeReceivers/Queries/ReceiverAlreadySignedQuery.cs

@@ -1,82 +0,0 @@
-using DigitalData.Core.Abstraction.Application.Repository;
-using EnvelopeGenerator.Application.Exceptions;
-using EnvelopeGenerator.Domain;
-using EnvelopeGenerator.Domain.Entities;
-using EnvelopeGenerator.Extensions;
-using MediatR;
-using Microsoft.EntityFrameworkCore;
-
-namespace EnvelopeGenerator.Application.EnvelopeReceivers.Queries;
-
-/// <summary>
-/// 
-/// </summary>
-public record ReceiverAlreadySignedQuery : IRequest<bool>
-{
-    /// <summary>
-    /// 
-    /// </summary>
-    public required string Key
-    {
-        get => (EnvelopeUuid, ReceiverSignature).EncodeEnvelopeReceiverId();
-        init
-        {
-            (string? EnvelopeUuid, string? ReceiverSignature) = value.DecodeEnvelopeReceiverId();
-            if (string.IsNullOrEmpty(EnvelopeUuid) || string.IsNullOrEmpty(ReceiverSignature))
-            {
-                throw new BadRequestException("Der EnvelopeReceiverKey muss ein gültiger Base64-kodierter String sein, der die EnvelopeUuid und die ReceiverSignature enthält.");
-            }
-        }
-    }
-
-    internal string EnvelopeUuid { get; set; } = null!;
-
-    internal string ReceiverSignature { get; set; } = null!;
-}
-
-/// <summary>
-/// 
-/// </summary>
-public static class ReceiverAlreadySignedQueryExtensions
-{
-    /// <summary>
-    /// 
-    /// </summary>
-    /// <param name="mediator"></param>
-    /// <param name="key"></param>
-    /// <returns></returns>
-    public static Task<bool> ReceiverAlreadySigned(IMediator mediator, string key)
-        => mediator.Send(new ReceiverAlreadySignedQuery { Key = key });
-}
-
-/// <summary>
-/// 
-/// </summary>
-public class ReceiverAlreadySignedQueryHandler : IRequestHandler<ReceiverAlreadySignedQuery, bool>
-{
-    private readonly IRepository<EnvelopeReceiver> _repo;
-
-    /// <summary>
-    /// 
-    /// </summary>
-    /// <param name="repo"></param>
-    public ReceiverAlreadySignedQueryHandler(IRepository<EnvelopeReceiver> repo)
-    {
-        _repo = repo;
-    }
-
-    /// <summary>
-    /// 
-    /// </summary>
-    /// <param name="request"></param>
-    /// <param name="cancel"></param>
-    /// <returns></returns>
-    public async Task<bool> Handle(ReceiverAlreadySignedQuery request, CancellationToken cancel = default)
-    {
-        return await _repo.Read()
-            .Where(er => er.Envelope.Uuid == request.EnvelopeUuid)
-            .Where(er => er.Receiver.Signature == request.ReceiverSignature)
-            .Where(er => er.Envelope.History.Any(hist => hist.Status == Constants.EnvelopeStatus.DocumentSigned))
-            .AnyAsync(cancel);
-    }
-}

EnvelopeGenerator.Application/Envelopes/Commands/CreateEnvelopeCommand.cs

@@ -1,6 +1,4 @@
-using EnvelopeGenerator.Application.Dto;
-using EnvelopeGenerator.Application.Envelopes.Queries;
-using MediatR;
+using MediatR;
 using Microsoft.AspNetCore.Mvc.ModelBinding;
 using System.ComponentModel.DataAnnotations;
 using System.Text.Json.Serialization;
@@ -17,7 +15,7 @@ public record CreateEnvelopeCommand(
     [Required] string Title,
     [Required] string Message,
     bool TFAEnabled = false
-    ) : IRequest<EnvelopeDto?>
+    ) : IRequest<CreateEnvelopeResponse?>
 {
     /// <summary>
     /// Id of receiver
@@ -25,4 +23,4 @@ public record CreateEnvelopeCommand(
     [JsonIgnore]
     [BindNever]
     public int? UserId { get; set; }
-};
+};

EnvelopeGenerator.Application/Envelopes/Commands/CreateEnvelopeCommandHandler.cs

@@ -1,6 +1,5 @@
 using AutoMapper;
-using EnvelopeGenerator.Application.Interfaces.SQLExecutor;
-using EnvelopeGenerator.Application.Dto;
+using EnvelopeGenerator.Application.Contracts.SQLExecutor;
 using MediatR;
 
 namespace EnvelopeGenerator.Application.Envelopes.Commands;
@@ -8,7 +7,7 @@ namespace EnvelopeGenerator.Application.Envelopes.Commands;
 /// <summary>
 /// 
 /// </summary>
-public class CreateEnvelopeCommandHandler : IRequestHandler<CreateEnvelopeCommand, EnvelopeDto?>
+public class CreateEnvelopeCommandHandler : IRequestHandler<CreateEnvelopeCommand, CreateEnvelopeResponse?>
 {
     private readonly IEnvelopeExecutor _envelopeExecutor;
 
@@ -31,12 +30,12 @@ public class CreateEnvelopeCommandHandler : IRequestHandler<CreateEnvelopeComman
     /// <param name="request"></param>
     /// <param name="cancellationToken"></param>
     /// <returns></returns>
-    public async Task<EnvelopeDto?> Handle(CreateEnvelopeCommand request, CancellationToken cancellationToken)
+    public async Task<CreateEnvelopeResponse?> Handle(CreateEnvelopeCommand request, CancellationToken cancellationToken)
     {
         int userId = request.UserId ?? throw new InvalidOperationException("UserId cannot be null when creating an envelope.");
 
         var envelope = await _envelopeExecutor.CreateEnvelopeAsync(userId, request.Title, request.Message, request.TFAEnabled, cancellationToken);
 
-        return _mapper.Map<EnvelopeDto>(envelope);
+        return _mapper.Map<CreateEnvelopeResponse>(envelope);
     }
 }

EnvelopeGenerator.Application/Envelopes/Commands/CreateEnvelopeMappingProfile.cs

@@ -0,0 +1,19 @@
+using AutoMapper;
+using EnvelopeGenerator.Application.EnvelopeReceivers.Commands.Create;
+using EnvelopeGenerator.Domain.Entities;
+
+namespace EnvelopeGenerator.Application.Envelopes.Commands;
+
+/// <summary>
+/// 
+/// </summary>
+public class CreateEnvelopeMappingProfile : Profile
+{
+    /// <summary>
+    /// 
+    /// </summary>
+    public CreateEnvelopeMappingProfile()
+    {
+        CreateMap<Envelope, CreateEnvelopeReceiverResponse>();
+    }
+}

EnvelopeGenerator.Application/Envelopes/Commands/CreateEnvelopeResponse.cs

@@ -0,0 +1,20 @@
+using EnvelopeGenerator.Application.Envelopes.Queries.Read;
+
+namespace EnvelopeGenerator.Application.Envelopes.Commands;
+
+/// <summary>
+/// 
+/// </summary>
+/// <param name="Id"><inheritdoc/></param>
+/// <param name="UserId"><inheritdoc/></param>
+/// <param name="Status"><inheritdoc/></param>
+/// <param name="Uuid"><inheritdoc/></param>
+/// <param name="Message"><inheritdoc/></param>
+/// <param name="AddedWhen"><inheritdoc/></param>
+/// <param name="ChangedWhen"><inheritdoc/></param>
+/// <param name="Title"><inheritdoc/></param>
+/// <param name="Language"><inheritdoc/></param>
+/// <param name="TFAEnabled"><inheritdoc/></param>
+/// <param name="User"><inheritdoc/></param>
+public record CreateEnvelopeResponse(int Id, int UserId, int Status, string Uuid, string? Message, DateTime AddedWhen, DateTime? ChangedWhen, string? Title, string Language, bool TFAEnabled, DigitalData.UserManager.Domain.Entities.User User) 
+    : ReadEnvelopeResponse(Id, UserId, Status, Uuid, Message, AddedWhen, ChangedWhen, Title, Language, TFAEnabled, User);

EnvelopeGenerator.Application/Envelopes/EnvelopeQuery.cs

@@ -0,0 +1,16 @@
+using MediatR;
+
+namespace EnvelopeGenerator.Application.Envelopes;
+
+/// <summary>
+/// Repräsentiert eine Abfrage für Umschläge.
+/// </summary>
+/// <param name="Id">Die eindeutige Kennung des Umschlags.</param>
+/// <param name="Status">Der Status des Umschlags.</param>
+/// <param name="Uuid">Die universell eindeutige Kennung des Umschlags.</param>
+public record EnvelopeQuery(
+    int? Id = null,
+    int? Status = null,
+    string? Uuid = null) : IRequest
+{
+};

EnvelopeGenerator.Application/Envelopes/MappingProfile.cs

@@ -1,19 +0,0 @@
-using AutoMapper;
-using EnvelopeGenerator.Application.EnvelopeReceivers.Commands;
-using EnvelopeGenerator.Domain.Entities;
-
-namespace EnvelopeGenerator.Application.Envelopes;
-
-/// <summary>
-/// 
-/// </summary>
-public class MappingProfile : Profile
-{
-    /// <summary>
-    /// 
-    /// </summary>
-    public MappingProfile()
-    {
-        CreateMap<Envelope, CreateEnvelopeReceiverResponse>();
-    }
-}

EnvelopeGenerator.Application/Envelopes/Queries/Read/ReadEnvelopeQuery.cs

@@ -0,0 +1,8 @@
+namespace EnvelopeGenerator.Application.Envelopes.Queries.Read;
+
+/// <summary>
+/// Stellt eine Abfrage zum Lesen von Briefumschlägen dar.
+/// </summary>
+public record ReadEnvelopeQuery : EnvelopeQuery
+{
+}

EnvelopeGenerator.Application/Envelopes/Queries/Read/ReadEnvelopeResponse.cs

@@ -0,0 +1,36 @@
+using EnvelopeGenerator.Domain;
+
+namespace EnvelopeGenerator.Application.Envelopes.Queries.Read;
+
+/// <summary>
+/// Repräsentiert die Antwort für das Lesen eines Umschlags.
+/// </summary>
+/// <param name="Id">Die eindeutige Kennung des Umschlags.</param>
+/// <param name="UserId">Die Kennung des Benutzers, der den Umschlag erstellt hat.</param>
+/// <param name="Status">Der Status des Umschlags als numerischer Wert.</param>
+/// <param name="Uuid">Die universelle eindeutige Kennung (UUID) des Umschlags.</param>
+/// <param name="Message">Eine optionale Nachricht, die mit dem Umschlag verknüpft ist.</param>
+/// <param name="AddedWhen">Das Datum und die Uhrzeit, wann der Umschlag hinzugefügt wurde.</param>
+/// <param name="ChangedWhen">Das Datum und die Uhrzeit, wann der Umschlag zuletzt geändert wurde (falls vorhanden).</param>
+/// <param name="Title">Ein optionaler Titel des Umschlags.</param>
+/// <param name="Language">Die Sprache, die mit dem Umschlag verknüpft ist.</param>
+/// <param name="TFAEnabled">Gibt an, ob die Zwei-Faktor-Authentifizierung (TFA) aktiviert ist.</param>
+/// <param name="User">Das Benutzerobjekt, das mit dem Umschlag verknüpft ist.</param>
+public record ReadEnvelopeResponse(
+    int Id,
+    int UserId,
+    int Status,
+    string Uuid,
+    string? Message,
+    DateTime AddedWhen,
+    DateTime? ChangedWhen,
+    string? Title,
+    string Language,
+    bool TFAEnabled,
+    DigitalData.UserManager.Domain.Entities.User User)
+{
+    /// <summary>
+    /// Gibt den Namen des Status zurück, der dem numerischen Statuswert entspricht.
+    /// </summary>
+    public string StatusName => ((Constants.EnvelopeStatus)Status).ToString();
+}

EnvelopeGenerator.Application/Envelopes/Queries/ReceiverName/ReadReceiverNameQuery.cs

@@ -1,6 +1,6 @@
-using EnvelopeGenerator.Application.Receivers.Queries;
+using EnvelopeGenerator.Application.Receivers.Queries.Read;
 
-namespace EnvelopeGenerator.Application.Envelopes.Queries;
+namespace EnvelopeGenerator.Application.Envelopes.Queries.ReceiverName;
 
 /// <summary>
 /// Eine Abfrage, um die zuletzt verwendete Anrede eines Empfängers zu ermitteln, 

EnvelopeGenerator.Application/Extensions/MappingExtensions.cs

@@ -1,4 +1,4 @@
-using EnvelopeGenerator.Application.Dto.Messaging;
+using EnvelopeGenerator.Application.DTOs.Messaging;
 
 namespace EnvelopeGenerator.Application.Extensions;
 

EnvelopeGenerator.Application/Extensions/TaskExtensions.cs

@@ -1,53 +0,0 @@
-using EnvelopeGenerator.Application.Exceptions;
-
-namespace EnvelopeGenerator.Application.Extensions;
-
-/// <summary>
-/// Extension methods for tasks
-/// </summary>
-public static class TaskExtensions
-{
-    /// <summary>
-    /// Awaits the specified task and ensures that the result is not <c>null</c>.
-    /// If the result is <c>null</c>, a <see cref="NotFoundException"/> is thrown.
-    /// </summary>
-    /// <typeparam name="T">The type of the result.</typeparam>
-    /// <param name="task">The task to await.</param>
-    /// <param name="exceptionMessage">Optional custom exception message.</param>
-    /// <returns>The awaited result if not <c>null</c>.</returns>
-    /// <exception cref="NotFoundException">Thrown if the result is <c>null</c>.</exception>
-    public static async Task<T> ThrowIfNull<T>(this Task<T?> task, string? exceptionMessage = null)
-    {
-        var result = await task;
-        return result ?? throw new NotFoundException(exceptionMessage);
-    }
-
-    /// <summary>
-    /// Awaits the specified task and ensures that the result is not <c>empty</c>.
-    /// If the result contains no elements, a <see cref="NotFoundException"/> is thrown.
-    /// </summary>
-    /// <typeparam name="T">The element type of the collection.</typeparam>
-    /// <param name="task">The task to await.</param>
-    /// <param name="exceptionMessage">Optional custom exception message.</param>
-    /// <returns>The awaited collection if it is not <c>null</c> or empty.</returns>
-    /// <exception cref="NotFoundException">Thrown if the result is <c>null</c> or empty.</exception>
-    public static async Task<IEnumerable<T>> ThrowIfNull<T>(this Task<IEnumerable<T>> task, string? exceptionMessage = null)
-    {
-        var result = await task;
-        return result?.Any() ?? false ? result : throw new NotFoundException(exceptionMessage);
-    }
-
-    /// <summary>
-    /// 
-    /// </summary>
-    /// <typeparam name="T"></typeparam>
-    /// <typeparam name="I"></typeparam>
-    /// <param name="task"></param>
-    /// <param name="act"></param>
-    /// <returns></returns>
-    public static async Task<I> Then<T, I>(this Task<T> task, Func<T, I> act)
-    {
-        var res = await task;
-        return act(res);
-    }
-}

EnvelopeGenerator.Application/Histories/Queries/Read/ReadHistoryMappingProfile.cs

@@ -1,18 +1,17 @@
 using AutoMapper;
-using EnvelopeGenerator.Application.Histories.Queries.Read;
 using EnvelopeGenerator.Domain.Entities;
 
-namespace EnvelopeGenerator.Application.Histories;
+namespace EnvelopeGenerator.Application.Histories.Queries.Read;
 
 /// <summary>
 /// 
 /// </summary>
-public class MappingProfile: Profile
+public class ReadHistoryMappingProfile: Profile
 {
     /// <summary>
     /// 
     /// </summary>
-    public MappingProfile()
+    public ReadHistoryMappingProfile()
     {
         CreateMap<EnvelopeHistory, ReadHistoryResponse>();
     }

EnvelopeGenerator.Application/Histories/Queries/Read/ReadHistoryQuery.cs

@@ -9,8 +9,8 @@ namespace EnvelopeGenerator.Application.Histories.Queries.Read;
 /// Repräsentiert eine Abfrage für die Verlaufshistorie eines Umschlags.
 /// </summary>
 /// <param name="EnvelopeId">Die eindeutige Kennung des Umschlags.</param>
-/// <param name="Status">Der Include des Umschlags, der abgefragt werden soll. Kann optional angegeben werden, um die Ergebnisse zu filtern.</param>
-/// <param name="OnlyLast">Abfrage zur Steuerung, ob nur der aktuelle Include oder der gesamte Datensatz zurückgegeben wird.</param>
+/// <param name="Status">Der Status des Umschlags, der abgefragt werden soll. Kann optional angegeben werden, um die Ergebnisse zu filtern.</param>
+/// <param name="OnlyLast">Abfrage zur Steuerung, ob nur der aktuelle Status oder der gesamte Datensatz zurückgegeben wird.</param>
 public record ReadHistoryQuery(
     [Required]
     int EnvelopeId,

EnvelopeGenerator.Application/Histories/Queries/Read/ReadHistoryQueryHandler.cs

@@ -1,5 +1,5 @@
 using AutoMapper;
-using EnvelopeGenerator.Application.Interfaces.Repositories;
+using EnvelopeGenerator.Application.Contracts.Repositories;
 using EnvelopeGenerator.Application.Exceptions;
 using MediatR;
 

EnvelopeGenerator.Application/Receivers/Queries/Read/ReadReceiverQuery.cs

@@ -0,0 +1,10 @@
+namespace EnvelopeGenerator.Application.Receivers.Queries.Read;
+
+/// <summary>
+/// Stellt eine Abfrage dar, um die Details eines Empfängers zu lesen.
+/// Diese Abfrage erbt von <see cref="ReceiverQuery"/> und wird verwendet, 
+/// um spezifische Informationen über einen Empfänger abzurufen.
+/// </summary>
+public record ReadReceiverQuery : ReceiverQuery
+{
+}

EnvelopeGenerator.Application/Receivers/Queries/Read/ReadReceiverResponse.cs

@@ -0,0 +1,12 @@
+namespace EnvelopeGenerator.Application.Receivers.Queries.Read;
+
+/// <summary>
+/// Repräsentiert die Antwort auf eine Abfrage, um einen Empfänger zu lesen.
+/// </summary>
+/// <param name="Id">Die eindeutige Identifikationsnummer des Empfängers.</param>
+/// <param name="EmailAddress">Die E-Mail-Adresse des Empfängers.</param>
+/// <param name="AddedWhen">Das Datum und die Uhrzeit, wann der Empfänger hinzugefügt wurde.</param>
+/// <param name="Signature">Die Signatur des Empfängers.</param>
+public record ReadReceiverResponse(int Id, string EmailAddress, DateTime AddedWhen, string Signature)
+{
+}

EnvelopeGenerator.Application/Receivers/Queries/ReadReceiverQuery.cs

@@ -1,23 +0,0 @@
-namespace EnvelopeGenerator.Application.Receivers.Queries;
-
-/// <summary>
-/// Stellt eine Abfrage dar, um die Details eines Empfängers zu lesen.
-/// um spezifische Informationen über einen Empfänger abzurufen.
-/// </summary>
-public record ReadReceiverQuery
-{
-    /// <summary>
-    /// ID des Empfängers
-    /// </summary>
-    public int? Id { get; init; }
-
-    /// <summary>
-    /// E-Mail Adresse des Empfängers
-    /// </summary>
-    public string? EmailAddress { get; init; }
-
-    /// <summary>
-    /// Eindeutige Signatur des Empfängers
-    /// </summary>
-    public string? Signature { get; init; }
-}

EnvelopeGenerator.Application/Receivers/ReceiverQuery.cs

@@ -0,0 +1,9 @@
+namespace EnvelopeGenerator.Application.Receivers;
+
+/// <summary>
+/// Empfänger des Umschlags
+/// </summary>
+/// <param name="Id">ID des Empfängers</param>
+/// <param name="EmailAddress">E-Mail Adresse des Empfängers</param>
+/// <param name="Signature">Eindeutige Signatur des Empfängers</param>
+public record ReceiverQuery(int? Id = null, string? EmailAddress = null, string? Signature = null);

EnvelopeGenerator.Application/SQL/DocumentCreateReadSQL.cs

@@ -1,5 +1,5 @@
 using Dapper;
-using EnvelopeGenerator.Application.Interfaces.SQLExecutor;
+using EnvelopeGenerator.Application.Contracts.SQLExecutor;
 using EnvelopeGenerator.Application.Exceptions;
 using EnvelopeGenerator.Domain.Entities;