chore: make formatter typing more specific

Author: BobTheBuidler

web3/middleware/validation.py

@@ -36,8 +36,8 @@
     FormattingMiddlewareBuilder,
 )
 from web3.types import (
-    Formatters,
     FormattersDict,
+    RequestFormatters,
     RPCEndpoint,
     TxParams,
 )
@@ -151,7 +151,7 @@ def build_method_validators(w3: "Web3", method: RPCEndpoint) -> FormattersDict:
 async def async_build_method_validators(
     async_w3: "AsyncWeb3", method: RPCEndpoint
 ) -> FormattersDict:
-    request_formatters: Formatters = {}
+    request_formatters: RequestFormatters = {}
     if RPCEndpoint(method) in METHODS_TO_VALIDATE:
         w3_chain_id = await async_w3.eth.chain_id
         for method in METHODS_TO_VALIDATE:

web3/types.py

@@ -66,7 +66,10 @@
 Timestamp = NewType("Timestamp", int)
 Wei = NewType("Wei", int)
 Gwei = NewType("Gwei", int)
-Formatters = Dict[RPCEndpoint, Callable[..., Any]]
+RequestFormatter = Callable[..., TReturn]
+RequestFormatters = Dict[RPCEndpoint, RequestFormatter[Any]]
+ResponseFormatter = Callable[["RPCResponse"], TReturn]
+ResponseFormatters = Dict[RPCEndpoint, ResponseFormatter[Any]]
 
 
 class AccessListEntry(TypedDict):
@@ -308,9 +311,9 @@ class CreateAccessListResponse(TypedDict):
 
 
 class FormattersDict(TypedDict, total=False):
-    error_formatters: Optional[Formatters]
-    request_formatters: Optional[Formatters]
-    result_formatters: Optional[Formatters]
+    error_formatters: Optional[ResponseFormatters]
+    request_formatters: Optional[ResponseFormatters]
+    result_formatters: Optional[ResponseFormatters]
 
 
 class FilterParams(TypedDict, total=False):