darkfi/bin/dnet/src/rpc.py

# This file is part of DarkFi (https://dark.fi)
#
# Copyright (C) 2020-2026 Dyne.org foundation
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

import json
import time
import random
import logging
import asyncio


class JsonRpc:

    async def start(self, host, port):
        #logging.info(f"trying to connect to {host}:{port}")
        reader, writer = await asyncio.open_connection(host, port)
        self.reader = reader
        self.writer = writer

    async def stop(self):
        self.writer.close()
        await self.writer.wait_closed()

    async def _make_request(self, method, params):
        ident = random.randint(0, 2**16)
        request = {
            "jsonrpc": "2.0",
            "method": method,
            "params": params,
            "id": ident,
        }

        message = json.dumps(request) + "\n"
        self.writer.write(message.encode())
        await self.writer.drain()
        data = await self.reader.readline()
        message = data.decode().strip()
        response = json.loads(message)
        return response

    async def _subscribe(self, method, params):
        ident = random.randint(0, 2**16)
        request = {
            "jsonrpc": "2.0",
            "method": method,
            "params": params,
            "id": ident,
        }

        message = json.dumps(request) + "\n"
        self.writer.write(message.encode())
        await self.writer.drain()
        logging.debug("Subscribed")

    async def ping(self):
        return await self._make_request("ping", [])

    async def dnet_switch(self, state):
        return await self._make_request("dnet.switch", [state])

    async def dnet_subscribe_events(self):
        return await self._subscribe("dnet.subscribe_events", [])