feat(nodeconfig)!: Default to Bech32 format for IOTA key pairs

crates/iota-types/src/crypto.rs

@@ -198,6 +198,7 @@ impl EncodeDecodeBase64 for IotaKeyPair {
         Self::from_bytes(&bytes).map_err(|_| FastCryptoError::InvalidInput)
     }
 }
+
 impl IotaKeyPair {
     pub fn to_bytes(&self) -> Vec<u8> {
         let mut bytes: Vec<u8> = Vec::new();
@@ -268,7 +269,9 @@ impl Serialize for IotaKeyPair {
     where
         S: Serializer,
     {
-        let s = self.encode_base64();
+        use serde::ser::Error;
+        // Serialize keypair to Bech32 string
+        let s = self.encode().map_err(|e| Error::custom(e.to_string()))?;
         serializer.serialize_str(&s)
     }
 }
@@ -280,7 +283,12 @@ impl<'de> Deserialize<'de> for IotaKeyPair {
     {
         use serde::de::Error;
         let s = String::deserialize(deserializer)?;
-        IotaKeyPair::decode_base64(&s).map_err(|e| Error::custom(e.to_string()))
+        // Deserialize keypair from Bech32 (default) or Base64 string
+        if let Ok(kp) = IotaKeyPair::decode(&s) {
+            Ok(kp)
+        } else {
+            IotaKeyPair::decode_base64(&s).map_err(|e| Error::custom(e.to_string()))
+        }
     }
 }