Address code review: add Python 3.12-3.13 to test matrix, use Literal types, fix hash_f annotation

Co-authored-by: richardkiss <5336+richardkiss@users.noreply.github.com>

Author: Copilot

.github/workflows/test.yml

@@ -15,7 +15,7 @@ jobs:
       fail-fast: false
       max-parallel: 4
       matrix:
-        python-version: [3.8, 3.9, "3.10", "3.11"]
+        python-version: [3.8, 3.9, "3.10", "3.11", "3.12", "3.13"]
 
     steps:
     - name: Checkout Code

pycoin/ecdsa/intstream.py

@@ -1,10 +1,11 @@
+from typing import Literal
 
 
-def to_bytes(v: int, length: int, byteorder: str = "big") -> bytes:
+def to_bytes(v: int, length: int, byteorder: Literal["big", "little"] = "big") -> bytes:
     """This is the same functionality as ``int.to_bytes`` in python 3"""
-    return v.to_bytes(length, byteorder=byteorder)  # type: ignore[arg-type]
+    return v.to_bytes(length, byteorder=byteorder)
 
 
-def from_bytes(bytes: bytes, byteorder: str = "big", signed: bool = False) -> int:
+def from_bytes(bytes: bytes, byteorder: Literal["big", "little"] = "big", signed: bool = False) -> int:
     """This is the same functionality as ``int.from_bytes`` in python 3"""
-    return int.from_bytes(bytes, byteorder=byteorder, signed=signed)  # type: ignore[arg-type]
+    return int.from_bytes(bytes, byteorder=byteorder, signed=signed)

pycoin/ecdsa/rfc6979.py

@@ -10,7 +10,7 @@ def bit_length(v: int) -> int:
     return v.bit_length()
 
 
-def deterministic_generate_k(generator_order: int, secret_exponent: int, val: int, hash_f: Callable[[], Any] = hashlib.sha256) -> int:
+def deterministic_generate_k(generator_order: int, secret_exponent: int, val: int, hash_f: Callable[..., Any] = hashlib.sha256) -> int:
     """
     :param generator_order: result from `pycoin.ecdsa.Generator.Generator.order`,
         necessary to ensure the k value is within bound