refactor and cleanup [skip ci]

submodules/Postbox/Sources/AccessChallengeDataView.swift

@@ -0,0 +1,30 @@
+import Foundation
+
+final class MutableAccessChallengeDataView {
+    var data: PostboxAccessChallengeData
+    
+    init(data: PostboxAccessChallengeData) {
+        self.data = data
+    }
+    
+    func replay(updatedData: PostboxAccessChallengeData?) -> Bool {
+        var updated = false
+        
+        if let data = updatedData {
+            if self.data != data {
+                self.data = data
+                updated = true
+            }
+        }
+        
+        return updated
+    }
+}
+
+public final class AccessChallengeDataView: PostboxView {
+    public let data: PostboxAccessChallengeData
+    
+    init(_ view: MutableAccessChallengeDataView) {
+        self.data = view.data
+    }
+}