Client management

• Download NDF.
• Generate a secure password.
• Handle secure password storage with the iOS keychain.
• Create and store a new client.
• Load stored client.
• Remove stored client.
• Example app with all of the above.

Sources/ElixxirDAppsSDK/ClientLoader.swift

+import Bindings
+
+public struct ClientLoader {
+  public var load: (URL, Data) throws -> Client
+
+  public func callAsFunction(directoryURL: URL, password: Data) throws -> Client {
+    try load(directoryURL, password)
+  }
+}
+
+extension ClientLoader {
+  public static let live = ClientLoader { directoryURL, password in
+    var error: NSError?
+    let bindingsClient = BindingsLogin(directoryURL.path, password, &error)
+    if let error = error { throw error }
+    guard let bindingsClient = bindingsClient else {
+      throw BindingsLoginUnknownError()
+    }
+    return Client.live(bindingsClient: bindingsClient)
+  }
+}
+
+#if DEBUG
+extension ClientLoader {
+  public static let failing = ClientLoader { _, _ in
+    struct NotImplemented: Error {}
+    throw NotImplemented()
+  }
+}
+#endif