py-libp2p/libp2p/security/secure_transport_interface.py

from abc import ABC, abstractmethod
from typing import TYPE_CHECKING

if TYPE_CHECKING:
    from .secure_conn_interface import ISecureConn
    from libp2p.network.connection.raw_connection_interface import IRawConnection
    from libp2p.peer.id import ID


"""
Transport that is used to secure a connection. This transport is
chosen by a security transport multistream module.

Relevant go repo: https://github.com/libp2p/go-conn-security/blob/master/interface.go
"""


class ISecureTransport(ABC):
    @abstractmethod
    async def secure_inbound(self, conn: "IRawConnection") -> "ISecureConn":
        """
        Secure the connection, either locally or by communicating with opposing node via conn,
        for an inbound connection (i.e. we are not the initiator)
        :return: secure connection object (that implements secure_conn_interface)
        """

    @abstractmethod
    async def secure_outbound(
        self, conn: "IRawConnection", peer_id: "ID"
    ) -> "ISecureConn":
        """
        Secure the connection, either locally or by communicating with opposing node via conn,
        for an inbound connection (i.e. we are the initiator)
        :return: secure connection object (that implements secure_conn_interface)
        """