RTL/server/controllers/eclair/channels.ts

import request from 'request-promise';
import { Logger, LoggerService } from '../../utils/logger.js';
import { Common, CommonService } from '../../utils/common.js';
import { CommonSelectedNode } from '../../models/config.model.js';
import { createInvoiceRequestCall, listPendingInvoicesRequestCall } from './invoices.js';
import { findRouteBetweenNodesRequestCall } from './network.js';
import { getSentInfoFromPaymentRequest, sendPaymentToRouteRequestCall } from './payments.js';

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

export const simplifyAllChannels = (selNode: CommonSelectedNode, channels) => {
  let channelNodeIds = '';
  const simplifiedChannels = [];
  channels.forEach((channel) => {
    channelNodeIds = channelNodeIds + ',' + channel.nodeId;
    simplifiedChannels.push({
      nodeId: channel.nodeId ? channel.nodeId : '',
      channelId: channel.channelId ? channel.channelId : '',
      state: channel.state ? channel.state : '',
      announceChannel: channel.data && channel.data.commitments && channel.data.commitments.params && channel.data.commitments.params.channelFlags && channel.data.commitments.params.channelFlags.announceChannel ? channel.data.commitments.params.channelFlags.announceChannel : false,
      toLocal: (channel.data.commitments.active[0].localCommit.spec.toLocal) ? Math.round(+channel.data.commitments.active[0].localCommit.spec.toLocal / 1000) : 0,
      toRemote: (channel.data.commitments.active[0].localCommit.spec.toRemote) ? Math.round(+channel.data.commitments.active[0].localCommit.spec.toRemote / 1000) : 0,
      shortChannelId: channel.data && channel.data.channelUpdate && channel.data.channelUpdate.shortChannelId ? channel.data.channelUpdate.shortChannelId : '',
      isInitiator: channel.data && channel.data.commitments && channel.data.commitments.params && channel.data.commitments.params.localParams && channel.data.commitments.params.localParams.isInitiator ? channel.data.commitments.params.localParams.isInitiator : false,
      feeBaseMsat: channel.data && channel.data.channelUpdate && channel.data.channelUpdate.feeBaseMsat ? channel.data.channelUpdate.feeBaseMsat : 0,
      feeProportionalMillionths: channel.data && channel.data.channelUpdate && channel.data.channelUpdate.feeProportionalMillionths ? channel.data.channelUpdate.feeProportionalMillionths : 0,
      alias: ''
    });
  });
  channelNodeIds = channelNodeIds.substring(1);
  options.url = selNode.ln_server_url + '/nodes';
  options.form = { nodeIds: channelNodeIds };
  logger.log({ selectedNode: selNode, level: 'DEBUG', fileName: 'Channels', msg: 'Node Ids to find alias', data: channelNodeIds });
  return request.post(options).then((nodes) => {
    logger.log({ selectedNode: selNode, level: 'DEBUG', fileName: 'Channels', msg: 'Filtered Nodes Received', data: nodes });
    let foundPeer = null;
    simplifiedChannels?.map((channel) => {
      foundPeer = nodes.find((channelWithAlias) => channel.nodeId === channelWithAlias.nodeId);
      channel.alias = foundPeer ? foundPeer.alias : channel.nodeId.substring(0, 20);
      return channel;
    });
    return simplifiedChannels;
  }).catch((err) => simplifiedChannels);
};

export const getChannels = (req, res, next) => {
  logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'List 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.ln_server_url + '/channels';
  options.form = {};
  if (req.query && req.query.nodeId) {
    options.form = req.query;
    logger.log({ selectedNode: req.session.selectedNode, level: 'DEBUG', fileName: 'Channels', msg: 'Channels Node Id', data: options.form });
  }
  logger.log({ selectedNode: req.session.selectedNode, level: 'DEBUG', fileName: 'Channels', msg: 'Options', data: options });
  if (common.read_dummy_data) {
    common.getDummyData('Channels', req.session.selectedNode.ln_implementation).then((data) => { res.status(200).json(data); });
  } else {
    request.post(options).then((body) => {
      logger.log({ selectedNode: req.session.selectedNode, level: 'DEBUG', fileName: 'Channels', msg: 'Channels List Received', data: body });
      if (body && body.length) {
        return simplifyAllChannels(req.session.selectedNode, body).then((simplifiedChannels) => {
          logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'Simplified Channels with Alias Received', data: simplifiedChannels });
          res.status(200).json(simplifiedChannels);
        });
      } else {
        logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'Empty Channels List Received' });
        res.status(200).json([]);
      }
    }).
      catch((errRes) => {
        const err = common.handleError(errRes, 'Channels', 'List Channels Error', req.session.selectedNode);
        return res.status(err.statusCode).json({ message: err.message, error: err.error });
      });
  }
};

export const getChannelStats = (req, res, next) => {
  logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'Getting Channel States..' });
  options = common.getOptions(req);
  if (options.error) { return res.status(options.statusCode).json({ message: options.message, error: options.error }); }
  options.url = req.session.selectedNode.ln_server_url + '/channelstats';
  const today = new Date(Date.now());
  const tillToday = (Math.round(today.getTime() / 1000)).toString();
  const fromLastMonth = (Math.round(new Date(today.getFullYear(), today.getMonth() - 1, today.getDate() + 1, 0, 0, 0).getTime() / 1000)).toString();
  options.form = {
    from: fromLastMonth,
    to: tillToday
  };
  request.post(options).then((body) => {
    logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'Channel States Received', data: body });
    res.status(201).json(body);
  }).catch((errRes) => {
    const err = common.handleError(errRes, 'Channels', 'Get Channel Stats 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.ln_server_url + '/open';
  options.form = req.body;
  logger.log({ selectedNode: req.session.selectedNode, level: 'DEBUG', fileName: 'Channels', msg: 'Open Channel Params', data: options.form });
  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 updateChannelRelayFee = (req, res, next) => {
  logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'Updating Channel Relay 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.ln_server_url + '/updaterelayfee';
  options.form = req.query;
  logger.log({ selectedNode: req.session.selectedNode, level: 'DEBUG', fileName: 'Channels', msg: 'Update Relay Fee Params', data: options.form });
  request.post(options).then((body) => {
    logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'Channel Relay Fee Updated', data: body });
    res.status(201).json(body);
  }).catch((errRes) => {
    const err = common.handleError(errRes, 'Channels', 'Update Relay Fee Error', req.session.selectedNode);
    return res.status(err.statusCode).json({ message: err.message, error: err.error });
  });
};

export const closeChannel = (req, res, next) => {
  options = common.getOptions(req);
  if (options.error) { return res.status(options.statusCode).json({ message: options.message, error: options.error }); }
  if (req.query.force !== 'true') {
    logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'Closing Channel..' });
    options.url = req.session.selectedNode.ln_server_url + '/close';
  } else {
    logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Channels', msg: 'Force Closing Channel..' });
    options.url = req.session.selectedNode.ln_server_url + '/forceclose';
  }
  options.form = { channelId: req.query.channelId };
  logger.log({ selectedNode: req.session.selectedNode, level: 'DEBUG', fileName: 'Channels', msg: 'Close URL', data: options.url });
  logger.log({ selectedNode: req.session.selectedNode, level: 'DEBUG', fileName: 'Channels', msg: 'Close Params', data: options.form });
  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 circularRebalance = (req, res, next) => {
  const crInvDescription = 'Circular rebalancing invoice for ' + (req.body.amountMsat / 1000) + ' Sats';
  options = common.getOptions(req);
  if (options.error) { return res.status(options.statusCode).json({ message: options.message, error: options.error }); }
  options.form = req.body;
  logger.log({ selectedNode: req.session.selectedNode, level: 'DEBUG', fileName: 'Channels', msg: 'Rebalance Params', data: options.form });
  const tillToday = (Math.round(new Date(Date.now()).getTime() / 1000)).toString();
  // Check if unpaid Invoice exists already
  listPendingInvoicesRequestCall(req.session.selectedNode).then((callRes: any[]) => {
    const foundExistingInvoice = callRes.find((inv) => inv.description.includes(crInvDescription) && inv.amount === req.body.amountMsat && inv.expiry && inv.timestamp && ((inv.expiry + inv.timestamp) >= tillToday));
    // Create new invoice if doesn't exist already
    const requestCalls = foundExistingInvoice && foundExistingInvoice.serialized ?
      [findRouteBetweenNodesRequestCall(req.session.selectedNode, req.body.amountMsat, req.body.sourceNodeId, req.body.targetNodeId, req.body.ignoreNodeIds, req.body.format)] :
      [findRouteBetweenNodesRequestCall(req.session.selectedNode, req.body.amountMsat, req.body.sourceNodeId, req.body.targetNodeId, req.body.ignoreNodeIds, req.body.format), createInvoiceRequestCall(req.session.selectedNode, crInvDescription, req.body.amountMsat)];
    Promise.all(requestCalls).then((values: any[]) => {
      // eslint-disable-next-line arrow-body-style
      const routes = values[0]?.routes?.filter((route) => {
        return !((route.shortChannelIds[0] === req.body.sourceShortChannelId && route.shortChannelIds[1] === req.body.targetShortChannelId) ||
        (route.shortChannelIds[1] === req.body.sourceShortChannelId && route.shortChannelIds[0] === req.body.targetShortChannelId));
      });
      const firstRoute = routes[0].shortChannelIds.join() || '';
      const shortChannelIds = req.body.sourceShortChannelId + ',' + firstRoute + ',' + req.body.targetShortChannelId;
      const invoice = (foundExistingInvoice && foundExistingInvoice.serialized ? foundExistingInvoice.serialized : (values[1] ? values[1].serialized : '')) || '';
      const paymentHash = (foundExistingInvoice && foundExistingInvoice.paymentHash ? foundExistingInvoice.paymentHash : (values[1] ? values[1].paymentHash : '') || '');
      return sendPaymentToRouteRequestCall(req.session.selectedNode, shortChannelIds, invoice, req.body.amountMsat).then((payToRouteCallRes) => {
        // eslint-disable-next-line arrow-body-style
        setTimeout(() => {
          return getSentInfoFromPaymentRequest(req.session.selectedNode, paymentHash).then((sentInfoCallRes) => {
            const payStatus = sentInfoCallRes.length && sentInfoCallRes.length > 0 ? sentInfoCallRes[sentInfoCallRes.length - 1].status : sentInfoCallRes;
            return res.status(201).json({ flgReusingInvoice: !!foundExistingInvoice, invoice: invoice, paymentRoute: shortChannelIds, paymentHash: paymentHash, paymentDetails: payToRouteCallRes, paymentStatus: payStatus });
          }).catch((errRes) => {
            const err = common.handleError(errRes, 'Channels', 'Channel Rebalance From Sent Info Error', req.session.selectedNode);
            return res.status(err.statusCode).json({ flgReusingInvoice: !!foundExistingInvoice, invoice: invoice, paymentRoute: shortChannelIds, paymentHash: paymentHash, paymentDetails: payToRouteCallRes, paymentStatus: { error: err.error } });
          });
        }, 3000);
      }).catch((errRes) => {
        const err = common.handleError(errRes, 'Channels', 'Channel Rebalance From Send Payment To Route Error', req.session.selectedNode);
        return res.status(err.statusCode).json({ flgReusingInvoice: !!foundExistingInvoice, invoice: invoice, paymentRoute: shortChannelIds, paymentHash: paymentHash, paymentDetails: {}, paymentStatus: { error: err.error } });
      });
    }).catch((errRes) => {
      const err = common.handleError(errRes, 'Channels', 'Channel Rebalance From Find Routes Error', req.session.selectedNode);
      return res.status(err.statusCode).json({ flgReusingInvoice: !!foundExistingInvoice, invoice: (foundExistingInvoice.serialized || ''), paymentRoute: '', paymentHash: '', paymentDetails: {}, paymentStatus: { error: err.error } });
    });
  }).catch((errRes) => {
    const err = common.handleError(errRes, 'Channels', 'Channel Rebalance From List Pending Invoices Error', req.session.selectedNode);
    return res.status(err.statusCode).json({ flgReusingInvoice: false, invoice: '', paymentRoute: '', paymentHash: '', paymentDetails: {}, paymentStatus: { error: err.error } });
  });
};