Separate validation of condition method name from abi method name.

nucypher/policy/conditions/evm.py

@@ -185,6 +185,9 @@ class RPCCondition(AccessControlCondition):
         self._validate_expected_return_type()
 
     def _validate_method(self, method):
+        if not method:
+            raise InvalidCondition("Undefined method name")
+
         if method not in self.ALLOWED_METHODS:
             raise InvalidCondition(
                 f"'{method}' is not a permitted RPC endpoint for condition evaluation."
@@ -334,6 +337,8 @@ class ContractCondition(RPCCondition):
         *args,
         **kwargs,
     ):
+        if not method:
+            raise InvalidCondition("Undefined method name")
         try:
             _validate_condition_abi(
                 standard_contract_type, function_abi, method_name=method

nucypher/policy/conditions/validation.py

@@ -159,16 +159,16 @@ def _validate_condition_function_abi(function_abi: Dict, method_name: str) -> No
     """validates a dictionary as valid for use as a condition function ABI"""
     abi = ABIFunction(function_abi)
 
-    if not method_name:
-        raise ValueError("Missing method name")
+    if not abi.get("name"):
+        raise ValueError(f"Invalid ABI, no function name found {abi}")
+    if abi.get("name") != method_name:
+        raise ValueError(f"Mismatched ABI for contract function {method_name} - {abi}")
     if abi.get("type") != "function":
         raise ValueError(f"Invalid ABI type {abi}")
     if not abi.get("outputs"):
         raise ValueError(f"Invalid ABI, no outputs found {abi}")
     if abi.get("stateMutability") not in ["pure", "view"]:
         raise ValueError(f"Invalid ABI stateMutability {abi}")
-    if abi.get("name") != method_name:
-        raise ValueError(f"Missing ABI for method {method_name}")
 
 
 def _validate_condition_abi(