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diff --git a/ios/PacketTunnel/DeviceCheck/DeviceCheckRemoteServiceProtocol.swift b/ios/PacketTunnel/DeviceCheck/DeviceCheckRemoteServiceProtocol.swift
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+++ b/ios/PacketTunnel/DeviceCheck/DeviceCheckRemoteServiceProtocol.swift
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+//
+//  DeviceCheckRemoteServiceProtocol.swift
+//  PacketTunnel
+//
+//  Created by pronebird on 07/06/2023.
+//  Copyright © 2023 Mullvad VPN AB. All rights reserved.
+//
+
+import Foundation
+import MullvadTypes
+import class WireGuardKitTypes.PublicKey
+
+/// A protocol that formalizes remote service dependency used by `DeviceCheckOperation`.
+protocol DeviceCheckRemoteServiceProtocol {
+    func getAccountData(accountNumber: String, completion: @escaping (Result<Account, Error>) -> Void)
+        -> Cancellable
+    func getDevice(accountNumber: String, identifier: String, completion: @escaping (Result<Device, Error>) -> Void)
+        -> Cancellable
+    func rotateDeviceKey(
+        accountNumber: String,
+        identifier: String,
+        publicKey: PublicKey,
+        completion: @escaping (Result<Device, Error>) -> Void
+    ) -> Cancellable
+}