Add support for AttributeDict and HexBytes serialization

schemas/blocks.py

@@ -1,6 +1,9 @@
+import json
 from typing import Dict, List, Optional
 
+from hexbytes import HexBytes
 from pydantic import BaseModel
+from web3.datastructures import AttributeDict
 
 
 class Block(BaseModel):
@@ -12,6 +15,12 @@ class Block(BaseModel):
     transaction_hashes: List[str]
     txs_gas_data: Dict[str, dict]
 
+    class Config:
+        json_encoders = {
+            AttributeDict: dict,
+            HexBytes: lambda h: h.hex(),
+        }
+
     def get_filtered_calls(self, hash: str) -> List[dict]:
         return [
             call for call in self.calls