replace: attributes with cache cached_property

Author: LVivona

libp2p/peer/id.py

@@ -3,6 +3,10 @@
 import base58
 import multihash
 
+from functools import (
+    cached_property,
+)
+
 from libp2p.crypto.keys import (
     PublicKey,
 )
@@ -36,25 +40,23 @@ def digest(self) -> bytes:
 
 class ID:
     _bytes: bytes
-    _xor_id: int | None = None
-    _b58_str: str | None = None
 
     def __init__(self, peer_id_bytes: bytes) -> None:
         self._bytes = peer_id_bytes
 
-    @property
+    @cached_property
     def xor_id(self) -> int:
-        if not self._xor_id:
-            self._xor_id = int(sha256_digest(self._bytes).hex(), 16)
-        return self._xor_id
+        return int(sha256_digest(self._bytes).hex(), 16)
+
+    @cached_property
+    def base58(self) -> str:
+        return base58.b58encode(self._bytes).decode()
 
     def to_bytes(self) -> bytes:
         return self._bytes
 
     def to_base58(self) -> str:
-        if not self._b58_str:
-            self._b58_str = base58.b58encode(self._bytes).decode()
-        return self._b58_str
+        return self.base58
 
     def __repr__(self) -> str:
         return f"<libp2p.peer.id.ID ({self!s})>"