diff --git a/Bank/BankDatabaseImplement/BankDB.cs b/Bank/BankDatabaseImplement/BankDB.cs
index 7696258..adfe519 100644
--- a/Bank/BankDatabaseImplement/BankDB.cs
+++ b/Bank/BankDatabaseImplement/BankDB.cs
@@ -1,12 +1,32 @@
-using System;
+using BankDatabaseImplement.Models;
+using Microsoft.EntityFrameworkCore;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace BankDatabaseImplement
 {
-    internal class BankDB
+    public class BankDB : DbContext
     {
+        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+        {
+            if (optionsBuilder.IsConfigured == false)
+            {
+                optionsBuilder.UseNpgsql(@"
+                    Host=localhost;
+                    Port=5432;
+                    Database=BankFullNew;
+                    Username=postgres;
+                    Password=55256636a;");
+            }
+            base.OnConfiguring(optionsBuilder);
+        }
+
+        public virtual DbSet<Client> Clients { set; get; }
+        public virtual DbSet<Cost> Costs { set; get; }
+        public virtual DbSet<CostByPurchase> CostByPurchases { set; get; }
+        public virtual DbSet<Employee> Employees { set; get; }
+        public virtual DbSet<Operation> Operations { set; get; }
+        public virtual DbSet<OperationByPurchase> OperationByPurchases { set; get; }
+        public virtual DbSet<Payment> Payments { set; get; }
+        public virtual DbSet<Purchase> Purchases { set; get; }
     }
 }
diff --git a/Bank/BankDatabaseImplement/Implements/ClientStorage.cs b/Bank/BankDatabaseImplement/Implements/ClientStorage.cs
index 6317931..9d3469f 100644
--- a/Bank/BankDatabaseImplement/Implements/ClientStorage.cs
+++ b/Bank/BankDatabaseImplement/Implements/ClientStorage.cs
@@ -1,12 +1,40 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using BankContracts.BindingModels;
+using BankContracts.SearchModels;
+using BankContracts.StoragesContracts;
+using BankContracts.ViewModels;
+using BankDatabaseImplement.Models;
 
 namespace BankDatabaseImplement.Implements
 {
-    internal class ClientStorage
+    public class ClientStorage : IClientStorage
     {
+        private void CheckSearchModel(ClientSearchModel model)
+        {
+            if (model == null)
+                throw new ArgumentNullException("Передаваемая модель для поиска равна нулю", nameof(model));
+            if (!model.Id.HasValue && string.IsNullOrEmpty(model.PhoneNumber) && string.IsNullOrEmpty(model.Password))
+                throw new ArgumentException("Все передаваемые поля поисковой модели оказались пусты или равны null");
+            if (!model.Id.HasValue && (string.IsNullOrEmpty(model.PhoneNumber) && !string.IsNullOrEmpty(model.Password)))
+                throw new ArgumentException("Для нахождения соответствующего пользователя вместе с паролем нужен логин");
+        }
+        public ClientViewModel? GetElement(ClientSearchModel model)
+        {
+            CheckSearchModel(model);
+            using var context = new BankDB();
+
+            return context.Clients.FirstOrDefault(x => x.PhoneNumber.Equals(model.PhoneNumber) && (string.IsNullOrEmpty(model.Password) || x.Password.Equals(model.Password)))?.GetViewModel;
+        }
+        public ClientViewModel? Insert(ClientBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            var newClient = Client.Create(model);
+            using var context = new BankDB();
+            context.Clients.Add(newClient);
+            context.SaveChanges();
+            return newClient.GetViewModel;
+        }
     }
 }
diff --git a/Bank/BankDatabaseImplement/Implements/PaymentStorage.cs b/Bank/BankDatabaseImplement/Implements/PaymentStorage.cs
index 5e0d08c..96538b8 100644
--- a/Bank/BankDatabaseImplement/Implements/PaymentStorage.cs
+++ b/Bank/BankDatabaseImplement/Implements/PaymentStorage.cs
@@ -1,12 +1,76 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using BankContracts.BindingModels;
+using BankContracts.SearchModels;
+using BankContracts.StoragesContracts;
+using BankContracts.ViewModels;
+using BankDatabaseImplement.Models;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Query;
 
 namespace BankDatabaseImplement.Implements
 {
-    internal class PaymentStorage
+    public class PaymentStorage : IPaymentStorage
     {
+        private static IIncludableQueryable<Payment, Operation?> Payments(BankDB context)
+            => context.Payments.Include(x => x.OperationByPurchase).ThenInclude(x => x.Operation);
+
+        public List<PaymentViewModel> GetFullList()
+        {
+            using var context = new BankDB();
+            return Payments(context)
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+
+        public List<PaymentViewModel> GetFilteredList(PaymentSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model), "Получена пустая поисковая модель");
+            }
+            if (model.DateFrom.HasValue && !model.DateTo.HasValue || model.DateTo.HasValue && !model.DateFrom.HasValue)
+            {
+                throw new ArgumentException("Получена поисковая модель только с началом или концом периода");
+            }
+            if (!model.DateFrom.HasValue && !model.OperationId.HasValue)
+            {
+                throw new ArgumentNullException(nameof(model.OperationId), "Получена поисковая модель без OperationId");
+
+            }
+            if (!model.DateFrom.HasValue && !model.PurchaseId.HasValue)
+            {
+                throw new ArgumentNullException(nameof(model.PurchaseId), "Получена поисковая модель без PurchaseId");
+            }
+            using var context = new BankDB();
+            if (model.DateFrom.HasValue)
+                return Payments(context)
+                       .Where(x => model.DateFrom.Value <= x.Date && x.Date <= model.DateTo.Value)
+                       .Select(x => x.GetViewModel)
+                       .ToList();
+
+            return Payments(context)
+                .Where(x => x.OperationByPurchase != null &&
+                        x.OperationByPurchase.OperationId == model.OperationId &&
+                        x.OperationByPurchase.PurchaseId == model.PurchaseId)
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+        public PaymentViewModel? GetElement(PaymentSearchModel model)
+        {
+            using var context = new BankDB();
+            return Payments(context)
+                .FirstOrDefault(x => (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
+        }
+        public PaymentViewModel? Insert(PaymentBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            var newPayment = Payment.Create(model);
+            using var context = new BankDB();
+            context.Payments.Add(newPayment);
+            context.SaveChanges();
+            return newPayment.GetViewModel;
+        }
     }
 }
diff --git a/Bank/BankDatabaseImplement/Implements/PurchaseStorage.cs b/Bank/BankDatabaseImplement/Implements/PurchaseStorage.cs
index 9b32af6..78b1e34 100644
--- a/Bank/BankDatabaseImplement/Implements/PurchaseStorage.cs
+++ b/Bank/BankDatabaseImplement/Implements/PurchaseStorage.cs
@@ -1,12 +1,151 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using System.Security.Cryptography.X509Certificates;
+using BankContracts.BindingModels;
+using BankContracts.SearchModels;
+using BankContracts.StoragesContracts;
+using BankContracts.ViewModels;
+using BankDatabaseImplement.Models;
+using Microsoft.EntityFrameworkCore;
 
 namespace BankDatabaseImplement.Implements
 {
-    internal class PurchaseStorage
+    public class PurchaseStorage : IPurchaseStorage
     {
+        private void CheckSearchModel(PurchaseSearchModel model)
+        {
+            if (model == null)
+                throw new ArgumentNullException("Передаваемая модель для поиска равна нулю", nameof(model));
+            if (!model.Id.HasValue && !model.ClientId.HasValue && !model.DateFrom.HasValue && !model.DateTo.HasValue && model.OperationsIds == null)
+                throw new ArgumentException("Все передаваемые поля поисковой модели оказались пусты или равны null");
+            if (model.DateFrom.HasValue != model.DateTo.HasValue)
+                throw new ArgumentException($"Не указано начало {model.DateFrom} или конец {model.DateTo} периода для поиска по дате.");
+        }
+        public PurchaseViewModel? Delete(PurchaseBindingModel model)
+        {
+            using var context = new BankDB();
+            var element = context.Purchases.FirstOrDefault(x => x.Id == model.Id);
+            if (element != null)
+            {
+                context.Purchases.Remove(element);
+                context.SaveChanges();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+
+
+        public List<PaymentViewModel> GetPaymentsFromPurchaseAndOperation(PurchaseSearchModel modelPurchase, OperationSearchModel modelOperation)
+        {
+            if (!modelPurchase.Id.HasValue)
+            {
+                throw new ArgumentNullException(nameof(modelPurchase), "Получена поисковая модель без Id");
+            }
+            if (!modelOperation.Id.HasValue)
+            {
+                throw new ArgumentNullException(nameof(modelOperation), "Получена поисковая модель без Id");
+            }
+            using var context = new BankDB();
+            var carByPurchase = context.OperationByPurchases
+                .Include(x => x.Payments)
+                .FirstOrDefault(x => x.OperationId == modelOperation.Id && x.PurchaseId == modelPurchase.Id);
+            if (carByPurchase?.Payments == null)
+            {
+                throw new InvalidOperationException(
+                    $"Не существует связи между данной операции(Id={modelOperation.Id}) и покупкой(Id={modelPurchase.Id})");
+            }
+            return carByPurchase.Payments.Select(payment => payment.GetViewModel).ToList();
+        }
+
+        public PurchaseViewModel? GetElement(PurchaseSearchModel model)
+        {
+            using var context = new BankDB();
+            if (!model.Id.HasValue)
+            {
+                return null;
+            }
+            return context.Purchases
+                .Include(x => x.Client)
+                .Include(x => x.Operations)
+                .FirstOrDefault(x => model.Id.HasValue && x.Id == model.Id)?.GetViewModel;
+        }
+
+        public List<PurchaseViewModel> GetFilteredList(PurchaseSearchModel model)
+        {
+            CheckSearchModel(model);
+            if (model.Id.HasValue)
+            {
+                var res = GetElement(model);
+                return res != null ? new() { res } : new();
+            }
+
+            using var context = new BankDB();
+
+            var query = context.Purchases.Include(x => x.Client);
+            IQueryable<Purchase>? resultQuery = null;
+            if (model.ClientId.HasValue)
+            {
+
+                return query
+                    .Where(x => model.ClientId == x.ClientId)
+                    .Select(x => x.GetViewModel)
+                    .ToList();
+            }
+
+            if (model.DateTo.HasValue)
+                resultQuery = query
+                    .Include(x => x.Operations)
+                    .ThenInclude(x => x.Operation)
+                    .Include(x => x.Costs)!
+                    .ThenInclude(x => x.Cost)
+                    .Where(x => model.DateFrom <= x.DatePurchase && x.DatePurchase <= model.DateTo);
+
+            else if (model.OperationsIds != null)
+                resultQuery = query
+                    .Where(x => x.Operations.Any(x => model.OperationsIds.Contains(x.OperationId)))
+                    .Include(x => x.Operations)
+                    .ThenInclude(x => x.Operation);
+
+            return resultQuery?
+                .Select(x => x.GetViewModel)
+                .ToList() ?? new();
+        }
+
+        public List<PurchaseViewModel> GetFullList()
+        {
+            using var context = new BankDB();
+            return context.Purchases
+                .Include(x => x.Client)
+                .Include(x => x.Operations)
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+
+        public PurchaseViewModel? Insert(PurchaseBindingModel model)
+        {
+            var newPurchase = Purchase.Create(model);
+            if (newPurchase == null)
+            {
+                return null;
+            }
+            using var context = new BankDB();
+            context.Purchases.Add(newPurchase);
+            context.SaveChanges();
+            newPurchase.UpdateOperations(context, model);
+            context.SaveChanges();
+            return newPurchase.GetViewModel;
+        }
+
+        public PurchaseViewModel? Update(PurchaseBindingModel model)
+        {
+            using var context = new BankDB();
+            var purchase = context.Purchases.FirstOrDefault(x => x.Id == model.Id);
+            if (purchase == null)
+            {
+                return null;
+            }
+            purchase.Update(model);
+            purchase.UpdateOperations(context, model);
+            context.SaveChanges();
+            return purchase.GetViewModel;
+        }
     }
 }
diff --git a/Bank/BankDatabaseImplement/Models/Client.cs b/Bank/BankDatabaseImplement/Models/Client.cs
index 2040411..cdff700 100644
--- a/Bank/BankDatabaseImplement/Models/Client.cs
+++ b/Bank/BankDatabaseImplement/Models/Client.cs
@@ -1,12 +1,57 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using BankContracts.BindingModels;
+using BankContracts.ViewModels;
+using BankDataModels;
+using System.ComponentModel.DataAnnotations;
 
 namespace BankDatabaseImplement.Models
 {
-    internal class Client
+    public class Client : IClientModel
     {
+        public int Id { get; set; }
+        [Required]
+        public string FirstName { get; private set; } = string.Empty;
+        [Required]
+        public string LastName { get; private set; } = string.Empty;
+
+        public string? MiddleName { get; private set; }
+        [Required]
+        public string Address { get; private set; } = string.Empty;
+        [Required]
+        public string PhoneNumber { get; private set; } = string.Empty;
+        [Required]
+        public string Email { get; set; } = string.Empty;
+        [Required]
+        public string Password { get; private set; } = string.Empty;
+        [Required]
+        public List<Purchase>? Purchases { get; private set; }
+
+        public static Client Create(ClientBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Client()
+            {
+                FirstName = model.FirstName,
+                LastName = model.LastName,
+                MiddleName = model.MiddleName,
+                PhoneNumber = model.PhoneNumber,
+                Password = model.Password,
+                Id = model.Id,
+                Email = model.Email,
+            };
+        }
+
+        public ClientViewModel GetViewModel => new()
+        {
+            FirstName = FirstName,
+            LastName = LastName,
+            MiddleName = MiddleName,
+            PhoneNumber = PhoneNumber,
+            Password = Password,
+            Id = Id,
+            Email = Email,
+        };
     }
 }
diff --git a/Bank/BankDatabaseImplement/Models/CostByPurchase.cs b/Bank/BankDatabaseImplement/Models/CostByPurchase.cs
index 46b0bb4..6b34817 100644
--- a/Bank/BankDatabaseImplement/Models/CostByPurchase.cs
+++ b/Bank/BankDatabaseImplement/Models/CostByPurchase.cs
@@ -1,12 +1,13 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using System.ComponentModel.DataAnnotations;
+using BankDataModels.ProxyModels;
 
 namespace BankDatabaseImplement.Models
 {
-    internal class CostByPurchase
+    public class CostByPurchase : CostByPurchaseModel
     {
+        [Required]
+        public Cost? Cost { get; private set; }
+        [Required]
+        public Purchase? Purchase { get; private set; }
     }
 }
diff --git a/Bank/BankDatabaseImplement/Models/OperationByPurchase.cs b/Bank/BankDatabaseImplement/Models/OperationByPurchase.cs
index 7a11b21..a5d6ac9 100644
--- a/Bank/BankDatabaseImplement/Models/OperationByPurchase.cs
+++ b/Bank/BankDatabaseImplement/Models/OperationByPurchase.cs
@@ -1,12 +1,15 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using System.ComponentModel.DataAnnotations;
+using BankDataModels.ProxyModels;
 
 namespace BankDatabaseImplement.Models
 {
-    internal class OperationByPurchase
+    public class OperationByPurchase : OperationByPurchaseModel
     {
+        [Required]
+        public Operation? Operation { get; private set; }
+        [Required]
+        public Purchase? Purchase { get; private set; }
+        [Required]
+        public List<Payment>? Payments { get; private set; }
     }
-}
+}
\ No newline at end of file
diff --git a/Bank/BankDatabaseImplement/Models/Payment.cs b/Bank/BankDatabaseImplement/Models/Payment.cs
index 7fa2d8b..65efd96 100644
--- a/Bank/BankDatabaseImplement/Models/Payment.cs
+++ b/Bank/BankDatabaseImplement/Models/Payment.cs
@@ -1,12 +1,51 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using BankContracts.BindingModels;
+using BankContracts.ViewModels;
+using BankDataModels;
+using System.ComponentModel.DataAnnotations;
+using System.Diagnostics;
 
 namespace BankDatabaseImplement.Models
 {
-    internal class Payment
+    public class Payment : IPaymentModel
     {
+        [Required]
+        public int OperationByPurchaseId { get; private set; }
+
+        [Required]
+        public DateOnly Date { get; private set; }
+
+        [Required]
+        public double PaidPrice { get; private set; }
+
+        public int Id { get; private set; }
+
+        [Required]
+        public OperationByPurchase? OperationByPurchase { get; private set; }
+
+        public static Payment Create(PaymentBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Payment()
+            {
+
+                Date = model.Date,
+                PaidPrice = model.PaidPrice,
+                Id = model.Id,
+                OperationByPurchaseId = model.OperationByPurchaseId,
+            };
+        }
+        public PaymentViewModel GetViewModel => new()
+        {
+            Operation = OperationByPurchase?.Operation?.GetViewModel,
+            OperationByPurchase = OperationByPurchase,
+            FullPrice = OperationByPurchase?.Operation?.Price ?? -1,
+            Date = Date,
+            PaidPrice = PaidPrice,
+            Id = Id,
+            OperationByPurchaseId = OperationByPurchaseId,
+        };
     }
 }
diff --git a/Bank/BankDatabaseImplement/Models/Purchase.cs b/Bank/BankDatabaseImplement/Models/Purchase.cs
index 318de8a..3e5c82c 100644
--- a/Bank/BankDatabaseImplement/Models/Purchase.cs
+++ b/Bank/BankDatabaseImplement/Models/Purchase.cs
@@ -1,12 +1,95 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using BankContracts.BindingModels;
+using BankContracts.ViewModels;
+using BankDataModels;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq.Expressions;
+using BankDataModels.ProxyModels;
 
 namespace BankDatabaseImplement.Models
 {
-    internal class Purchase
+    public class Purchase : IPurchaseModel
     {
+        public int ClientId { get; private set; }
+        public DateOnly DatePurchase { get; private set; }
+        private Dictionary<int, OperationByPurchaseModel>? _cachedOperations;
+        [NotMapped]
+        public Dictionary<int, OperationByPurchaseModel> OperationsModel => _cachedOperations ??= Operations.Select(x => (OperationByPurchaseModel)x).ToDictionary(x => x.OperationId, x => x);
+        [NotMapped]
+        public List<CostByPurchaseModel>? CostsModel => null;
+        public int Id { get; private set; }
+        [Required]
+        public Client? Client { get; private set; }
+        [Required]
+        public List<OperationByPurchase> Operations { get; private set; } = new();
+        [Required]
+        public List<CostByPurchase> Costs { get; private set; } = new();
+
+        public static Purchase Create(PurchaseBindingModel model)
+        {
+            return new Purchase()
+            {
+                ClientId = model.ClientId,
+                Id = model.Id,
+                DatePurchase = model.DatePurchase,
+
+            };
+        }
+        public void Update(PurchaseBindingModel model)
+        {
+            DatePurchase = model.DatePurchase;
+        }
+
+        public PurchaseViewModel GetViewModel => new()
+        {
+            OperationsModel = OperationsModel,
+            Id = Id,
+            DatePurchase = DatePurchase,
+            ClientId = ClientId,
+            ClientPhoneNumber = Client?.PhoneNumber ?? string.Empty,
+
+            CostViewModels = Costs?
+                .Select(x => x.Cost.GetViewModel)
+                .ToList() ?? new(),
+            OperationViewModels = Operations?
+                .Select(x => x.Operation?.GetViewModel)
+                .ToList() ?? new()
+        };
+
+        public PurchaseViewModel GetViewModel2 => new()
+        {
+            OperationsModel = OperationsModel,
+            Id = Id,
+            DatePurchase = DatePurchase,
+            ClientId = ClientId,
+            ClientPhoneNumber = Client?.PhoneNumber ?? string.Empty,
+
+            CostViewModels = Costs?
+                .Select(x => x.Cost.GetViewModel)
+                .ToList() ?? new()
+        };
+
+        public void UpdateOperations(BankDB context, PurchaseBindingModel model)
+        {
+            var oldOperations = context.OperationByPurchases.Where(x => x.PurchaseId == model.Id).ToDictionary(x => x.OperationId, x => x);
+            var newOperations = model.OperationsModel.ToDictionary(
+                x => x.Key,
+                x => new OperationByPurchase()
+                {
+                    OperationId = x.Key,
+                    PurchaseId = Id,
+                    CountOperations = x.Value.CountOperations
+                }
+                );
+
+            context.RemoveRange(oldOperations.Where(x => !newOperations.ContainsKey(x.Key)).Select(x => x.Value));
+            context.AddRange(newOperations.Where(x => !oldOperations.ContainsKey(x.Key)).Select(x => x.Value));
+            oldOperations
+                .Where(x => newOperations.ContainsKey(x.Key))
+                .Select(x => x.Value).ToList()
+                .ForEach(x => x.CountOperations = newOperations[x.OperationId].CountOperations);
+            context.SaveChanges();
+            _cachedOperations = null;
+        }
     }
 }