diff --git a/simple-payments/src/signature/schnorr/mod.rs b/simple-payments/src/signature/schnorr/mod.rs
index c6ccbe1..999f4e0 100644
--- a/simple-payments/src/signature/schnorr/mod.rs
+++ b/simple-payments/src/signature/schnorr/mod.rs
@@ -106,7 +106,7 @@ where
             // Hash everything to get verifier challenge.
             // e := H(salt || pubkey || r || msg);
             let mut hash_input = Vec::new();
-            if parameters.salt != None {
+            if parameters.salt.is_some() {
                 hash_input.extend_from_slice(&parameters.salt.unwrap());
             }
             hash_input.extend_from_slice(&to_bytes![sk.public_key]?);
@@ -157,7 +157,7 @@ where
 
         // e = H(salt, kG, msg)
         let mut hash_input = Vec::new();
-        if parameters.salt != None {
+        if parameters.salt.is_some() {
             hash_input.extend_from_slice(&parameters.salt.unwrap());
         }
         hash_input.extend_from_slice(&to_bytes![pk]?);
diff --git a/simple-payments/src/transaction.rs b/simple-payments/src/transaction.rs
index 0a7afc8..c962a6d 100644
--- a/simple-payments/src/transaction.rs
+++ b/simple-payments/src/transaction.rs
@@ -67,7 +67,7 @@ impl Transaction {
             // Verify the amount is available in the sender account.
             result &= self.amount <= sender_acc_info.balance;
             // Verify that recipient account exists.
-            result &= state.id_to_account_info.get(&self.recipient).is_some();
+            result &= state.id_to_account_info.contains_key(&self.recipient);
             result
         } else {
             false