RTL/server/controllers/lnd/graph.ts

import request from 'request-promise';
import { Logger, LoggerService } from '../../utils/logger.js';
import { Common, CommonService } from '../../utils/common.js';
import { SelectedNode } from '../../models/config.model.js';
let options = null;
const logger: LoggerService = Logger;
const common: CommonService = Common;

export const getAliasFromPubkey = (selNode: SelectedNode, pubkey) => {
  options.url = selNode.settings.lnServerUrl + '/v1/graph/node/' + pubkey;
  return request(options).then((res) => {
    logger.log({ selectedNode: selNode, level: 'DEBUG', fileName: 'Graph', msg: 'Alias Received', data: res.node.alias });
    return res.node.alias;
  }).
    catch((err) => pubkey.substring(0, 20));
};

export const getDescribeGraph = (req, res, next) => {
  logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Graph', msg: 'Getting Network Graph..' });
  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/graph';
  request.get(options).then((body) => {
    logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Graph', msg: 'Network Graph Received', data: body });
    res.status(200).json(body);
  }).catch((errRes) => {
    const err = common.handleError(errRes, 'Graph', 'Describe Graph Error', req.session.selectedNode);
    return res.status(err.statusCode).json({ message: err.message, error: err.error });
  });
};

export const getGraphInfo = (req, res, next) => {
  logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Graph', msg: 'Getting Graph Information..' });
  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/graph/info';
  request.get(options).then((body) => {
    logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Graph', msg: 'Graph Information Received', data: body });
    res.status(200).json(body);
  }).catch((errRes) => {
    const err = common.handleError(errRes, 'Graph', 'Graph Information Error', req.session.selectedNode);
    return res.status(err.statusCode).json({ message: err.message, error: err.error });
  });
};

export const getGraphNode = (req, res, next) => {
  logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Graph', msg: 'Getting Graph Node Information..' });
  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/graph/node/' + req.params.pubKey;
  request(options).then((body) => {
    logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Graph', msg: 'Graph Node Information Received', data: body });
    res.status(200).json(body);
  }).catch((errRes) => {
    const err = common.handleError(errRes, 'Graph', 'Get Node Info Error', req.session.selectedNode);
    return res.status(err.statusCode).json({ message: err.message, error: err.error });
  });
};

export const getGraphEdge = (req, res, next) => {
  logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Graph', msg: 'Getting Graph Edge Information..' });
  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/graph/edge/' + req.params.chanid;
  request(options).then((body) => {
    logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Graph', msg: 'Graph Edge Information Received', data: body });
    res.status(200).json(body);
  }).catch((errRes) => {
    const err = common.handleError(errRes, 'Graph', 'Get Edge Info Error', req.session.selectedNode);
    return res.status(err.statusCode).json({ message: err.message, error: err.error });
  });
};

export const getQueryRoutes = (req, res, next) => {
  logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Graph', msg: 'Getting Graph Routes..' });
  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/graph/routes/' + req.params.destPubkey + '/' + req.params.amount;
  if (req.query.outgoing_chan_id) {
    options.url = options.url + '?outgoing_chan_id=' + req.query.outgoing_chan_id;
  }
  logger.log({ selectedNode: req.session.selectedNode, level: 'DEBUG', fileName: 'Graph', msg: 'Query Routes URL', data: options.url });
  request(options).then((body) => {
    logger.log({ selectedNode: req.session.selectedNode, level: 'DEBUG', fileName: 'Graph', msg: 'Query Routes Received', data: body });
    if (body.routes && body.routes.length && body.routes.length > 0 && body.routes[0].hops && body.routes[0].hops.length && body.routes[0].hops.length > 0) {
      return Promise.all(body.routes[0].hops?.map((hop) => getAliasFromPubkey(req.session.selectedNode, hop.pub_key))).
        then((values) => {
          body.routes[0].hops?.map((hop, i) => {
            hop.hop_sequence = i + 1;
            hop.pubkey_alias = values[i];
            return hop;
          });
          logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Graph', msg: 'Graph Routes with Alias Received', data: body });
          res.status(200).json(body);
        }).
        catch((errRes) => {
          const err = common.handleError(errRes, 'Graph', 'Get Query Routes Error', req.session.selectedNode);
          return res.status(err.statusCode).json({ message: err.message, error: err.error });
        });
    } else {
      logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Graph', msg: 'Graph Routes Received', data: body });
      return res.status(200).json(body);
    }
  }).catch((errRes) => {
    const err = common.handleError(errRes, 'Graph', 'Get Query Routes Error', req.session.selectedNode);
    return res.status(err.statusCode).json({ message: err.message, error: err.error });
  });
};

export const getRemoteFeePolicy = (req, res, next) => {
  logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Graph', msg: 'Getting Remote Fee 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/graph/edge/' + req.params.chanid;
  request(options).then((body) => {
    logger.log({ selectedNode: req.session.selectedNode, level: 'DEBUG', fileName: 'Graph', msg: 'Edge Info Received', data: body });
    let remoteNodeFee = {};
    if (body.node1_pub === req.params.localPubkey) {
      remoteNodeFee = {
        time_lock_delta: body.node2_policy.time_lock_delta,
        fee_base_msat: body.node2_policy.fee_base_msat,
        fee_rate_milli_msat: body.node2_policy.fee_rate_milli_msat
      };
    } else if (body.node2_pub === req.params.localPubkey) {
      remoteNodeFee = {
        time_lock_delta: body.node1_policy.time_lock_delta,
        fee_base_msat: body.node1_policy.fee_base_msat,
        fee_rate_milli_msat: body.node1_policy.fee_rate_milli_msat
      };
    }
    logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Graph', msg: 'Remote Fee Policy Received', data: remoteNodeFee });
    res.status(200).json(remoteNodeFee);
  }).catch((errRes) => {
    const err = common.handleError(errRes, 'Graph', 'Remote Fee Policy Error', req.session.selectedNode);
    return res.status(err.statusCode).json({ message: err.message, error: err.error });
  });
};

export const getAliasesForPubkeys = (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.pubkeys) {
    const pubkeyArr = req.query.pubkeys.split(',');
    return Promise.all(pubkeyArr?.map((pubkey) => getAliasFromPubkey(req.session.selectedNode, pubkey))).
      then((values) => {
        logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Graph', msg: 'Node Alias', data: values });
        res.status(200).json(values);
      }).
      catch((errRes) => {
        const err = common.handleError(errRes, 'Graph', 'Get Aliases for Pubkeys Error', req.session.selectedNode);
        return res.status(err.statusCode).json({ message: err.message, error: err.error });
      });
  } else {
    return res.status(200).json([]);
  }
};