Add paymaster interface

starknet_py/net/paymaster/paymaster.py

@@ -0,0 +1,38 @@
+from abc import ABC, abstractmethod
+from typing import Optional
+
+from starknet_py.net.client_models import Calls, OutsideExecutionTimeBounds
+from starknet_py.net.paymaster.client import PaymasterClient
+from starknet_py.net.paymaster.models import FeeMode, BuildTransactionResponse
+
+
+class BasePaymaster(ABC):
+    @abstractmethod
+    async def client(self) -> PaymasterClient:
+        """
+        Get the PaymasterClient used by the Paymaster.
+        """
+
+    @abstractmethod
+    async def execute(
+        self,
+        *,
+        calls: Calls,
+        fee_mode: FeeMode,
+        execution_time_bounds: Optional[OutsideExecutionTimeBounds] = None,
+    ):
+        """
+        Takes calls and token and executes a transaction through the paymaster service.
+        """
+
+    @abstractmethod
+    async def sign(
+        self,
+        *,
+        calls: Calls,
+        fee_mode: FeeMode,
+        execution_time_bounds: Optional[OutsideExecutionTimeBounds] = None,
+    ) -> BuildTransactionResponse:
+        """
+        Takes calls and token and crates a transaction through the paymaster service without executing it.
+        """