fixed lint issues

src/solana/rpc/core.py

@@ -359,11 +359,11 @@ def _request_airdrop_args(
 
     def _send_raw_transaction_args(
         self, txn: Union[bytes, str], opts: types.TxOpts
-    ) -> Tuple[types.RPCMethod, str, Dict[str, Union[bool, Commitment, str]]]:
+    ) -> Tuple[types.RPCMethod, str, Dict[str, Union[bool, Commitment, str, int]]]:
 
         if isinstance(txn, bytes):
             txn = b64encode(txn).decode("utf-8")
-        params = {
+        params: Dict[str, Union[bool, Commitment, str, int]] = {
             self._skip_preflight_key: opts.skip_preflight,
             self._preflight_comm_key: opts.preflight_commitment,
             self._encoding_key: "base64",

src/solana/rpc/types.py

@@ -89,7 +89,7 @@ class TxOpts(NamedTuple):
     """If true, skip the preflight transaction checks."""
     preflight_commitment: Commitment = Finalized
     """Commitment level to use for preflight."""
-    max_retries: int = None
+    max_retries: Optional[int] = None
     """Maximum number of times for the RPC node to retry sending the transaction to the leader.
     If this parameter not provided, the RPC node will retry the transaction until it is finalized
     or until the blockhash expires