logout: clear keypair on logout

Fixes: #12
Reported-by: Jeff Thibault (github:jeffthibault)
Changelog-Fixed: Logging out now resets your keypair and actually logs out
Signed-off-by: William Casarin <jb55@jb55.com>

damus/Util/Keys.swift

@@ -84,15 +84,24 @@ func save_privkey(privkey: String) {
     UserDefaults.standard.set(privkey, forKey: "privkey")
 }
 
-func clear_privkey() {
+func clear_saved_privkey() {
     UserDefaults.standard.removeObject(forKey: "privkey")
 }
 
+func clear_saved_pubkey() {
+    UserDefaults.standard.removeObject(forKey: "pubkey")
+}
+
 func save_keypair(pubkey: String, privkey: String) {
     save_pubkey(pubkey: pubkey)
     save_privkey(privkey: privkey)
 }
 
+func clear_keypair() {
+    clear_saved_privkey()
+    clear_saved_pubkey()
+}
+
 func get_saved_keypair() -> Keypair? {
     get_saved_pubkey().flatMap { pubkey in
         let privkey = get_saved_privkey()

damus/Views/LoginView.swift

@@ -139,12 +139,12 @@ func process_login(_ key: ParsedKey, is_pubkey: Bool) -> Bool {
         save_pubkey(pubkey: pk)
         
     case .pub(let pub):
-        clear_privkey()
+        clear_saved_privkey()
         save_pubkey(pubkey: pub)
     
     case .hex(let hexstr):
         if is_pubkey {
-            clear_privkey()
+            clear_saved_privkey()
             save_pubkey(pubkey: hexstr)
         } else {
             save_privkey(privkey: hexstr)

damus/damusApp.swift

@@ -36,6 +36,7 @@ struct MainView: View {
             }
         }
         .onReceive(handle_notify(.logout)) { _ in
+            clear_keypair()
             keypair = nil
         }
         .onAppear {