diff --git a/SolardVPNCommunityCoreiOS/SOLARdVPNCommunityCoreiOS/Services/SessionsService/SessionServiceError.swift b/SolardVPNCommunityCoreiOS/SOLARdVPNCommunityCoreiOS/Services/SessionsService/SessionServiceError.swift
new file mode 100644
index 0000000..a4c496a
--- /dev/null
+++ b/SolardVPNCommunityCoreiOS/SOLARdVPNCommunityCoreiOS/Services/SessionsService/SessionServiceError.swift
@@ -0,0 +1,38 @@
+//
+//  SessionsServiceError.swift
+//  SOLARdVPNCommunityCoreiOS
+//
+//  Created by Lika Vorobeva on 29.11.2021.
+//
+
+import Foundation
+
+enum SessionsServiceError: LocalizedError {
+    case invalidURL
+    
+    case connectionParsingFailed
+    case nodeMisconfigured
+    case noQuota
+    
+    case serverLocalized(String)
+    case other(Error)
+}
+
+extension SessionsServiceError {
+    static var allCases: [SessionsServiceError] {
+        [.connectionParsingFailed, .nodeMisconfigured, .noQuota]
+    }
+    
+    var innerCodes: [Int] {
+        switch self {
+        case .nodeMisconfigured:
+            return [3, 4, 5]
+        case .noQuota:
+            return [9, 10]
+        case .connectionParsingFailed:
+            return [6, 7, 8]
+        default:
+            return []
+        }
+    }
+}
diff --git a/SolardVPNCommunityCoreiOS/SOLARdVPNCommunityCoreiOS/Services/SessionsService/SessionsService.swift b/SolardVPNCommunityCoreiOS/SOLARdVPNCommunityCoreiOS/Services/SessionsService/SessionsService.swift
new file mode 100644
index 0000000..1d1689d
--- /dev/null
+++ b/SolardVPNCommunityCoreiOS/SOLARdVPNCommunityCoreiOS/Services/SessionsService/SessionsService.swift
@@ -0,0 +1,100 @@
+//
+//  SessionsService.swift
+//  SOLARdVPNCommunityCoreiOS
+//
+//  Created by Lika Vorobeva on 20.07.2022.
+//
+
+import Foundation
+import SentinelWallet
+import SOLARAPI
+import WireGuardKit
+import Vapor
+
+final class SessionsService {
+    private let walletService: WalletService
+    private let sessionProvider: NodeSessionProviderType
+    private let subscriptionsProvider: SubscriptionsProviderType
+    
+    init(
+        sessionProvider: NodeSessionProviderType,
+        subscriptionsProvider: SubscriptionsProviderType,
+        walletService: WalletService
+    ) {
+        self.sessionProvider = sessionProvider
+        self.subscriptionsProvider = subscriptionsProvider
+        self.walletService = walletService
+    }
+}
+
+// MARK: - SubscriptionsServiceType
+
+extension SessionsService: SessionsServiceType {
+    func loadActiveSessions(completion: @escaping (Result<[SentinelWallet.Session], Error>) -> Void) {
+        subscriptionsProvider.queryActiveSessions(for: walletService.currentWalletAddress, completion: completion)
+    }
+    
+    func stopActiveSessions(completion: @escaping (Result<Void, Error>) -> Void) {
+        guard let sender = walletService.createTransactionSender() else {
+            completion(.failure(SubscriptionsServiceError.missingMnemonic))
+            return
+        }
+        
+        subscriptionsProvider.stopActiveSessions(sender: sender, completion: completion)
+    }
+    
+    func startSession(on subscriptionID: UInt64, node: String, completion: @escaping (Result<UInt64, Error>) -> Void) {
+        guard let sender = walletService.createTransactionSender() else {
+            completion(.failure(SubscriptionsServiceError.missingMnemonic))
+            return
+        }
+        
+        subscriptionsProvider.startNewSession(on: subscriptionID, sender: sender, node: node, completion: completion)
+    }
+    
+    func fetchConnectionData(
+        remoteURLString: String,
+        id: UInt64,
+        accountAddress: String,
+        signature: String,
+        completion: @escaping (Result<(Data, PrivateKey), SessionsServiceError>) -> Void
+    ) {
+        guard var components = URLComponents(string: remoteURLString) else {
+            completion(.failure(SessionsServiceError.invalidURL))
+            return
+        }
+        components.scheme = "http"
+        
+        guard let urlString = components.string, let remoteURL = URL(string: urlString) else {
+            completion(.failure(SessionsServiceError.invalidURL))
+            return
+        }
+        let wgKey = PrivateKey()
+        
+        sessionProvider.createClient(
+            remoteURL: remoteURL,
+            address: accountAddress,
+            id: "\(id)",
+            request: .init(key: wgKey.publicKey.base64Key, signature: signature)) { result in
+                switch result {
+                case .success(let infoResult):
+                    guard infoResult.success, let stringData = infoResult.result else {
+                        completion(.failure(.connectionParsingFailed))
+                        return
+                    }
+                    guard let data = Data(base64Encoded: stringData), data.bytes.count == 58 else {
+                        completion(.failure(.connectionParsingFailed))
+                        return
+                    }
+                    
+                    completion(.success((data, wgKey)))
+                case .failure(let error):
+                    #warning("TODO: map error")
+//                    let mapper = Self.mapNetworkError(handleSpecificGenericErrors: { error -> SessionsServiceError? in
+//                        return SessionsServiceError.allCases.first(where: { $0.innerCodes.contains(error.code) })
+//                    })
+//                    completion(.failure(error))
+                }
+            }
+    }
+}
diff --git a/SolardVPNCommunityCoreiOS/SOLARdVPNCommunityCoreiOS/Services/SessionsService/SessionsServiceType.swift b/SolardVPNCommunityCoreiOS/SOLARdVPNCommunityCoreiOS/Services/SessionsService/SessionsServiceType.swift
new file mode 100644
index 0000000..d937d31
--- /dev/null
+++ b/SolardVPNCommunityCoreiOS/SOLARdVPNCommunityCoreiOS/Services/SessionsService/SessionsServiceType.swift
@@ -0,0 +1,23 @@
+//
+//  SessionsServiceType.swift
+//  SOLARdVPNCommunityCoreiOS
+//
+//  Created by Lika Vorobeva on 20.07.2022.
+//
+
+import Foundation
+import SentinelWallet
+import WireGuardKit
+
+protocol SessionsServiceType {
+    func loadActiveSessions(completion: @escaping (Result<[Session], Error>) -> Void)
+    func stopActiveSessions(completion: @escaping (Result<Void, Error>) -> Void)
+    func startSession(on subscriptionID: UInt64, node: String, completion: @escaping (Result<UInt64, Error>) -> Void)
+    func fetchConnectionData(
+        remoteURLString: String,
+        id: UInt64,
+        accountAddress: String,
+        signature: String,
+        completion: @escaping (Result<(Data, PrivateKey), SessionsServiceError>) -> Void
+    )
+}