diff --git a/xmtp_cryptography/src/signature.rs b/xmtp_cryptography/src/signature.rs
index 40bf589f0..6011d4517 100644
--- a/xmtp_cryptography/src/signature.rs
+++ b/xmtp_cryptography/src/signature.rs
@@ -114,14 +114,14 @@ pub fn h160addr_to_string(bytes: H160) -> String {
 /// Check if an string is a valid ethereum address (valid hex and length 20).
 pub fn is_valid_ethereum_address<S: AsRef<str>>(address: S) -> bool {
     let address = address.as_ref();
-    let address = address.strip_prefix(&"0x").unwrap_or(&address);
+    let address = address.strip_prefix("0x").unwrap_or(address);
 
     if address.len() != 40 {
         return false;
     }
 
     for char in address.chars() {
-        if !char.is_digit(16) {
+        if !char.is_ascii_hexdigit() {
             return false;
         }
     }
diff --git a/xmtp_mls/src/groups/intents.rs b/xmtp_mls/src/groups/intents.rs
index f43270d95..5e634b99d 100644
--- a/xmtp_mls/src/groups/intents.rs
+++ b/xmtp_mls/src/groups/intents.rs
@@ -74,11 +74,11 @@ impl AddMembersIntentData {
         Self { account_addresses }
     }
 
-    pub(crate) fn to_bytes(self) -> Result<Vec<u8>, IntentError> {
+    pub(crate) fn to_bytes(&self) -> Result<Vec<u8>, IntentError> {
         let mut buf = Vec::new();
         AddMembersData {
             version: Some(AddMembersVersion::V1(AddMembersV1 {
-                account_addresses: self.account_addresses,
+                account_addresses: self.account_addresses.clone(),
             })),
         }
         .encode(&mut buf)
@@ -116,12 +116,12 @@ impl RemoveMembersIntentData {
         Self { account_addresses }
     }
 
-    pub(crate) fn to_bytes(self) -> Vec<u8> {
+    pub(crate) fn to_bytes(&self) -> Vec<u8> {
         let mut buf = Vec::new();
 
         RemoveMembersData {
             version: Some(RemoveMembersVersion::V1(RemoveMembersV1 {
-                account_addresses: self.account_addresses,
+                account_addresses: self.account_addresses.clone(),
             })),
         }
         .encode(&mut buf)