Reformat impl of `derive_extended_priv_key`

daemon/src/seed.rs

@@ -52,12 +52,13 @@ impl Seed {
     }
 
     pub fn derive_extended_priv_key(&self, network: Network) -> Result<ExtendedPrivKey> {
-        let h = Hkdf::<Sha256>::new(None, &self.0);
-        let mut okm = [0u8; 64];
-        h.expand(b"BITCOIN_WALLET_SEED", &mut okm)
+        let mut ext_priv_key_seed = [0u8; 64];
+
+        Hkdf::<Sha256>::new(None, &self.0)
+            .expand(b"BITCOIN_WALLET_SEED", &mut ext_priv_key_seed)
             .expect("okm array is of correct length");
 
-        let ext_priv_key = ExtendedPrivKey::new_master(network, &okm)?;
+        let ext_priv_key = ExtendedPrivKey::new_master(network, &ext_priv_key_seed)?;
 
         Ok(ext_priv_key)
     }