fix command

lib/src/lightclient.rs

@@ -1018,7 +1018,7 @@ impl LightClient {
         }
 
         let new_address = {
-            let  wallet = self.wallet.write().unwrap();
+            let mut  wallet = self.wallet.write().unwrap();
 
             let addr = wallet.import_taddr(sk, birthday);
             if addr.starts_with("Error") {

lib/src/lightwallet.rs

@@ -628,7 +628,7 @@ impl LightWallet {
         address
     }
 
-    pub fn import_taddr(&self, sk: String,  birthday: u64) -> String {
+    pub fn import_taddr(&mut self, sk: String,  birthday: u64) -> String {
         if !self.unlocked {
             return "Error: Can't add key while wallet is locked".to_string();
         }
@@ -657,6 +657,11 @@ impl LightWallet {
         //// Add to tkeys
         self.tkeys.write().unwrap().push(WalletTKey::import_hdkey(sk_raw , address.clone()));
 
+        // Adjust wallet birthday
+        if birthday < self.birthday {
+            self.birthday = if birthday < self.config.sapling_activation_height {self.config.sapling_activation_height} else {birthday};
+        }
+
         address
     }