Add __bytes__, from_bytes() and __hash__() to docs

umbral-pre-python/docs/index.rst

@@ -38,6 +38,14 @@ API reference
 
         Generates a new :py:class:`SecretKey` using ``label`` as a seed.
 
+    .. py:method:: __bytes__() -> bytes
+
+        Serializes the object into a bytestring.
+
+    .. py:staticmethod:: from_bytes(data: bytes) -> SecretKey
+
+        Restores the object from a bytestring.
+
 .. py:class:: PublicKey
 
     An ``umbral-pre`` public key object.
@@ -46,10 +54,34 @@ API reference
 
         Creates a public key corresponding to the given secret key.
 
+    .. py:method:: __bytes__() -> bytes
+
+        Serializes the object into a bytestring.
+
+    .. py:staticmethod:: from_bytes(data: bytes) -> PublicKey
+
+        Restores the object from a bytestring.
+
+    .. py:method:: __hash__() -> int
+
+        Returns a hash of self.
+
 .. py:class:: Capsule
 
     An encapsulated symmetric key.
 
+    .. py:method:: __bytes__() -> bytes
+
+        Serializes the object into a bytestring.
+
+    .. py:staticmethod:: from_bytes(data: bytes) -> Capsule
+
+        Restores the object from a bytestring.
+
+    .. py:method:: __hash__() -> int
+
+        Returns a hash of self.
+
 .. py:function:: encrypt(pk: PublicKey, plaintext: bytes) -> Tuple[Capsule, bytes]
 
     Creates a symmetric key, encrypts ``plaintext`` with it, and returns the encapsulated symmetric key along with the ciphertext. ``pk`` is the public key of the recipient.
@@ -81,6 +113,18 @@ API reference
 
         Verifies the integrity of the fragment using the signing key and, optionally, the delegating and the receiving keys (if they were included in the signature in :py:func:`generate_kfrags`).
 
+    .. py:method:: __bytes__() -> bytes
+
+        Serializes the object into a bytestring.
+
+    .. py:staticmethod:: from_bytes(data: bytes) -> KeyFrag
+
+        Restores the object from a bytestring.
+
+    .. py:method:: __hash__() -> int
+
+        Returns a hash of self.
+
 .. py:class:: CapsuleFrag
 
     A reencrypted fragment of an encapsulated symmetric key.
@@ -89,6 +133,18 @@ API reference
 
         Verifies the integrity of the fragment.
 
+    .. py:method:: __bytes__() -> bytes
+
+        Serializes the object into a bytestring.
+
+    .. py:staticmethod:: from_bytes(data: bytes) -> CapsuleFrag
+
+        Restores the object from a bytestring.
+
+    .. py:method:: __hash__() -> int
+
+        Returns a hash of self.
+
 
 Indices and tables
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