trying to implement a working pkarr client in python

src/errors.py

@@ -0,0 +1,52 @@
+class PkarrError(Exception):
+    """Base class for all pkarr-related errors."""
+    pass
+
+class KeypairError(PkarrError):
+    """Raised when there's an issue with keypair operations."""
+    pass
+
+class PublicKeyError(PkarrError):
+    """Raised when there's an issue with public key operations."""
+    pass
+
+class SignatureError(PkarrError):
+    """Raised when there's an issue with signature operations."""
+    pass
+
+class PacketError(PkarrError):
+    """Raised when there's an issue with packet operations."""
+    pass
+
+class DNSError(PkarrError):
+    """Raised when there's an issue with DNS operations."""
+    pass
+
+class DHTError(PkarrError):
+    """Raised when there's an issue with DHT operations."""
+    pass
+
+class InvalidSignedPacketBytesLength(PacketError):
+    """Raised when the SignedPacket bytes length is invalid."""
+    def __init__(self, length: int):
+        super().__init__(f"Invalid SignedPacket bytes length, expected at least 104 bytes but got: {length}")
+
+class InvalidRelayPayloadSize(PacketError):
+    """Raised when the relay payload size is invalid."""
+    def __init__(self, size: int):
+        super().__init__(f"Invalid relay payload size, expected at least 72 bytes but got: {size}")
+
+class PacketTooLarge(PacketError):
+    """Raised when the DNS packet is too large."""
+    def __init__(self, size: int):
+        super().__init__(f"DNS Packet is too large, expected max 1000 bytes but got: {size}")
+
+class DHTIsShutdown(DHTError):
+    """Raised when the DHT is shutdown."""
+    def __init__(self):
+        super().__init__("DHT is shutdown")
+
+class PublishInflight(DHTError):
+    """Raised when a publish query is already in flight for the same public key."""
+    def __init__(self):
+        super().__init__("Publish query is already in flight for the same public_key")