create function to add random sietch zaddr

lib/src/lightwallet.rs

@@ -4,9 +4,7 @@ use std::cmp;
 use std::collections::{HashMap, HashSet};
 use std::sync::{Arc, RwLock};
 use std::io::{Error, ErrorKind};
-
 use rand::{Rng, rngs::OsRng};
-
 use log::{info, warn, error};
 
 use protobuf::parse_from_bytes;
@@ -199,7 +197,7 @@ impl LightWallet {
             
             seed_bytes.copy_from_slice(&phrase.entropy());
         }
-
+      
         // The seed bytes is the raw entropy. To pass it to HD wallet generation, 
         // we need to get the 64 byte bip39 entropy
         let bip39_seed = bip39::Seed::new(&Mnemonic::from_entropy(&seed_bytes, Language::English).unwrap(), "");
@@ -466,7 +464,23 @@ impl LightWallet {
         }
 
         let pos = self.extsks.read().unwrap().len() as u32;
-        let bip39_seed = bip39::Seed::new(&Mnemonic::from_entropy(&self.seed, Language::English).unwrap(), "");
+    
+        // Radnom Generator benutzen!!!!!!
+       
+            let mut rng = rand::thread_rng();
+            let letter: String = rng.gen_range(b'A', b'Z').to_string();
+            let number: String = rng.gen_range(0, 999999).to_string();
+           // let combi: String = letter.to_string() + number.to_string();
+            let s = format!("{}{:06}", letter, number);
+            //println!("{}", s);
+        
+        let my_string = String::from(s);
+       // let my_immutable_string = &my_string; //This is a &String type
+    let dust: &str = &my_string; //This is an &str type
+
+   
+
+        let bip39_seed = bip39::Seed::new(&Mnemonic::from_entropy(&self.seed, Language::English).unwrap(), dust);
 
         let (_extsk, _extfvk, address) =
             LightWallet::get_zaddr_from_bip39seed(&self.config, &bip39_seed.as_bytes(), pos);