Prevent read on unlogged server

ios/Shared/RocketChat/MMKV.swift

@@ -14,25 +14,25 @@ extension MMKV {
 		return mmkv
 	}
 	
-	func userToken(for userId: String) -> String {
+	func userToken(for userId: String) -> String? {
 		guard let userToken = string(forKey: "reactnativemeteor_usertoken-\(userId)") else {
-			fatalError("userToken is nil for userId \(userId)")
+			return nil
 		}
 		
 		return userToken
 	}
 	
-	func userId(for server: String) -> String {
+	func userId(for server: String) -> String? {
 		guard let userId = string(forKey: "reactnativemeteor_usertoken-\(server)") else {
-			fatalError("userId is nil for server \(server)")
+			return nil
 		}
 		
 		return userId
 	}
 	
-	func privateKey(for server: String) -> String {
+	func privateKey(for server: String) -> String? {
 		guard let privateKey = string(forKey: "\(server)-RC_E2E_PRIVATE_KEY") else {
-			fatalError("privateKey is nil for server \(server)")
+			return nil
 		}
 		
 		return privateKey

ios/Shared/RocketChat/Storage.swift

@@ -1,23 +1,24 @@
 import Foundation
 
 struct Credentials {
-  let userId: String
-  let userToken: String
+	let userId: String
+	let userToken: String
 }
 
 final class Storage {
-  static let shared = Storage()
-
-  private let mmkv = MMKV.build()
-
-  func getCredentials(server: String) -> Credentials {
-    let userId = mmkv.userId(for: server)
-    let userToken = mmkv.userToken(for: userId)
-    
-    return .init(userId: userId, userToken: userToken)
-  }
-
-  func getPrivateKey(server: String) -> String {
-    mmkv.privateKey(for: server)
-  }
+	static let shared = Storage()
+	
+	private let mmkv = MMKV.build()
+	
+	func getCredentials(server: String) -> Credentials? {
+		guard let userId = mmkv.userId(for: server), let userToken = mmkv.userToken(for: userId) else {
+			return nil
+		}
+		
+		return .init(userId: userId, userToken: userToken)
+	}
+	
+	func getPrivateKey(server: String) -> String? {
+		mmkv.privateKey(for: server)
+	}
 }

ios/Watch/WatchConnection.swift

@@ -41,8 +41,10 @@ final class WatchConnection: NSObject {
 		let serversQuery = database.query(raw: "select * from servers") as [DBServer]
 		
 		let servers = serversQuery.compactMap { item -> WatchMessage.Server? in
-			let userId = mmkv.userId(for: item.identifier)
-			let userToken = mmkv.userToken(for: userId)
+			guard let userId = mmkv.userId(for: item.identifier), let userToken = mmkv.userToken(for: userId) else {
+				return nil
+			}
+			
 			let clientSSL = mmkv.clientSSL(for: item.url)
 			
 			let usersQuery = database.query(raw: "select * from users where token == ? limit 1", [userToken]) as [DBUser]