Use middleware for trace and receipt methods

mev_inspect/methods.py

@@ -0,0 +1,16 @@
+from typing import Callable, List
+
+from web3._utils.rpc_abi import RPC
+from web3.method import Method, default_root_munger
+from web3.types import BlockIdentifier, ParityBlockTrace, RPCEndpoint
+
+trace_block: Method[Callable[[BlockIdentifier], List[ParityBlockTrace]]] = Method(
+    RPC.trace_block,
+    mungers=[default_root_munger],
+)
+
+
+get_block_receipts: Method[Callable[[BlockIdentifier], List[dict]]] = Method(
+    RPCEndpoint("eth_getBlockReceipts"),
+    mungers=[default_root_munger],
+)