initial commit

v25/messaging/encoding.py

@@ -0,0 +1,21 @@
+from typing import Any, Optional
+
+import nacl.encoding
+import nacl.utils
+
+ENCODER = nacl.encoding.URLSafeBase64Encoder
+NONCE_SIZE = 32
+
+
+class Encoding:
+    @staticmethod
+    def encode(raw: Any) -> Optional[str]:
+        return None if raw is None else ENCODER.encode(bytes(raw)).decode('ascii')
+
+    @staticmethod
+    def decode(s: str) -> bytes:
+        return None if s is None else ENCODER.decode(s.encode('ascii'))
+
+    @classmethod
+    def nonce(cls):
+        return nacl.utils.random(NONCE_SIZE)