RTL/server/controllers/cln/channels.ts

import request from 'request-promise';
import { Logger, LoggerService } from '../../utils/logger.js';
import { Common, CommonService } from '../../utils/common.js';
import { getAlias } from './network.js';

let options = null;
const logger: LoggerService = Logger;
const common: CommonService = Common;

export const listPeerChannels = (req, res, next) => {
  logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'Getting Peer Channels..' });
  options = common.getOptions(req);
  if (options.error) { return res.status(options.statusCode).json({ message: options.message, error: options.error }); }
  options.url = req.session.selectedNode.settings.lnServerUrl + '/v1/listpeerchannels';
  request.post(options).then((body) => {
    logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'Peer Channels List Received', data: body.channels });
    if (!body.channels || body.channels.length === 0) {
      logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'No Channels to Process' });
      return res.status(200).json([]);
    }
    const getPeerAliasesTasks = body.channels.map((channel) => () => {
      channel.to_them_msat = channel.total_msat - channel.to_us_msat;
      channel.balancedness = (channel.total_msat === 0) ? 1 : (1 - Math.abs((channel.to_us_msat - channel.to_them_msat) / channel.total_msat)).toFixed(3);
      // listpeerchannels reports connection state as peer_connected. Mirror it onto the
      // documented legacy 'connected' field (see the Channel model) as a real boolean, so
      // any backward-compat consumer of this endpoint gets a defined true/false rather than
      // undefined when peer_connected is absent (issue #1606).
      channel.connected = !!channel.peer_connected;
      return getAlias(req.session.selectedNode, channel, 'peer_id');
    });
    common.runWithConcurrencyLimit(getPeerAliasesTasks, 20, () => {
      logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'Peer Channels List With Aliases Received', data: body.channels });
      return res.status(200).json(body.channels || []);
    });
  }).catch((errRes) => {
    const err = common.handleError(errRes, 'Channels', 'List Peer Channels Error', req.session.selectedNode);
    return res.status(err.statusCode).json({ message: err.message, error: err.error });
  });
};

export const openChannel = (req, res, next) => {
  logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'Opening Channel..' });
  options = common.getOptions(req);
  if (options.error) { return res.status(options.statusCode).json({ message: options.message, error: options.error }); }
  options.url = req.session.selectedNode.settings.lnServerUrl + '/v1/fundchannel';
  options.body = req.body;
  logger.log({ selectedNode: req.session.selectedNode, level: 'DEBUG', fileName: 'Channels', msg: 'Open Channel Options', data: options.body });
  request.post(options).then((body) => {
    logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'Channel Opened', data: body });
    res.status(201).json(body);
  }).catch((errRes) => {
    const err = common.handleError(errRes, 'Channels', 'Open Channel Error', req.session.selectedNode);
    return res.status(err.statusCode).json({ message: err.message, error: err.error });
  });
};

export const setChannelFee = (req, res, next) => {
  logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'Setting Channel Fee..' });
  options = common.getOptions(req);
  if (options.error) { return res.status(options.statusCode).json({ message: options.message, error: options.error }); }
  options.url = req.session.selectedNode.settings.lnServerUrl + '/v1/setchannel';
  options.body = req.body;
  logger.log({ selectedNode: req.session.selectedNode, level: 'DEBUG', fileName: 'Channels', msg: 'Update Channel Policy Options', data: options.body });
  request.post(options).then((body) => {
    logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'Updated Channel Policy', data: body });
    res.status(201).json(body);
  }).catch((errRes) => {
    const err = common.handleError(errRes, 'Channels', 'Update Channel Policy Error', req.session.selectedNode);
    return res.status(err.statusCode).json({ message: err.message, error: err.error });
  });
};

export const closeChannel = (req, res, next) => {
  logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'Closing Channel..' });
  req.setTimeout(60000 * 10); // timeout 10 mins
  options = common.getOptions(req);
  if (options.error) { return res.status(options.statusCode).json({ message: options.message, error: options.error }); }
  options.url = req.session.selectedNode.settings.lnServerUrl + '/v1/close';
  options.body = req.body;
  logger.log({ selectedNode: req.session.selectedNode, level: 'DEBUG', fileName: 'Channels', msg: 'Closing Channel', data: options.url });
  request.post(options).then((body) => {
    logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'Channel Closed', data: body });
    res.status(204).json(body);
  }).catch((errRes) => {
    const err = common.handleError(errRes, 'Channels', 'Close Channel Error', req.session.selectedNode);
    return res.status(err.statusCode).json({ message: err.message, error: err.error });
  });
};

export const listForwards = (req, res, next) => {
  const { status } = req.body;
  logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'Getting Channel List Forwards..' });
  options = common.getOptions(req);
  if (options.error) { return res.status(options.statusCode).json({ message: options.message, error: options.error }); }
  options.url = req.session.selectedNode.settings.lnServerUrl + '/v1/listforwards';
  options.body = req.body;
  request.post(options).then((body) => {
    logger.log({ selectedNode: req.session.selectedNode, level: 'DEBUG', fileName: 'Channels', msg: 'Forwarding History Received For Status ' + status, data: body });
    body.forwards = !body.forwards ? [] : (status === 'failed' || status === 'local_failed') ? body.forwards.slice(Math.max(0, body.forwards.length - 1000), Math.max(1000, body.forwards.length)).reverse() : body.forwards.reverse();
    res.status(200).json(body.forwards);
  }).catch((errRes) => {
    const err = common.handleError(errRes, 'Channels', 'Forwarding History Error', req.session.selectedNode);
    return res.status(err.statusCode).json({ message: err.message, error: err.error });
  });
};

export const funderUpdatePolicy = (req, res, next) => {
  logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'Getting or Updating Funder Policy..' });
  options = common.getOptions(req);
  if (options.error) { return res.status(options.statusCode).json({ message: options.message, error: options.error }); }
  options.url = req.session.selectedNode.settings.lnServerUrl + '/v1/funderupdate';
  options.body = req.body;
  logger.log({ selectedNode: req.session.selectedNode, level: 'DEBUG', fileName: 'Channels', msg: 'Funder Update Body', data: options.body });
  request.post(options).then((body) => {
    logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'Funder Policy Received', data: body });
    res.status(200).json(body);
  }).catch((errRes) => {
    const err = common.handleError(errRes, 'Channels', 'Funder Policy Error', req.session.selectedNode);
    return res.status(err.statusCode).json({ message: err.message, error: err.error });
  });
};