RTL/backend/controllers/cln/network.js

import request from 'request-promise';
import { Logger } from '../../utils/logger.js';
import { Common } from '../../utils/common.js';
let options = null;
const logger = Logger;
const common = Common;
// Alias cache: peerId -> { alias, ts }. Bounded by a TTL so an updated node alias is picked
// up without an RTL restart, and by a max size so it can't grow unbounded (evicts oldest).
const ALIAS_CACHE_TTL = 6 * 60 * 60 * 1000; // 6 hours
const ALIAS_CACHE_MAX = 5000;
const aliasCache = new Map();
export const getRoute = (req, res, next) => {
    logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Network', msg: 'Getting Network 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/getroute';
    options.body = req.body;
    request.post(options).then((body) => {
        logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Network', msg: 'Network Routes Received', data: body });
        // Resolve hop aliases with a bounded number of concurrent listnodes calls, matching the
        // peers/channels paths, so a long route can't storm clnrest (#1501).
        const getRouteAliasesTasks = (body.route || []).map((rt) => () => getAlias(req.session.selectedNode, rt, 'id'));
        common.runWithConcurrencyLimit(getRouteAliasesTasks, 20, () => {
            logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Peers', msg: 'Network Routes with Alias Received', data: body });
            res.status(200).json(body || []);
        });
    }).catch((errRes) => {
        const err = common.handleError(errRes, 'Network', 'Query Routes Error', req.session.selectedNode);
        return res.status(err.statusCode).json({ message: err.message, error: err.error });
    });
};
export const listChannels = (req, res, next) => {
    logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Network', msg: 'Channel Lookup..' });
    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/listchannels';
    options.body = req.body;
    request.post(options).then((body) => {
        logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Network', msg: 'Channel Lookup Finished', data: body });
        res.status(200).json(body);
    }).catch((errRes) => {
        const err = common.handleError(errRes, 'Network', 'Channel Lookup Error', req.session.selectedNode);
        return res.status(err.statusCode).json({ message: err.message, error: err.error });
    });
};
export const feeRates = (req, res, next) => {
    const { style } = req.body;
    logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Network', msg: 'Getting Network Fee Rates..' });
    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/feerates';
    options.body = req.body;
    request.post(options).then((body) => {
        logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Network', msg: 'Network Fee Rates Received for ' + style, data: body });
        res.status(200).json(body);
    }).catch((errRes) => {
        const err = common.handleError(errRes, 'Network', 'Fee Rates Error', req.session.selectedNode);
        return res.status(err.statusCode).json({ message: err.message, error: err.error });
    });
};
export const listNodes = (req, res, next) => {
    const filter_liquidity_ads = !!req.body.liquidity_ads;
    delete req.body.liquidity_ads;
    logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Network', msg: 'List Nodes..' });
    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/listnodes';
    options.body = req.body;
    logger.log({ selectedNode: req.session.selectedNode, level: 'DEBUG', fileName: 'Network', msg: 'List Nodes URL' + options.url });
    request.post(options).then((body) => {
        logger.log({ selectedNode: req.session.selectedNode, level: 'INFO', fileName: 'Network', msg: 'List Nodes Finished', data: body });
        let response = body.nodes;
        if (filter_liquidity_ads) {
            response = body.nodes.filter((node) => ((node.option_will_fund) ? node : null));
        }
        res.status(200).json(response);
    }).catch((errRes) => {
        const err = common.handleError(errRes, 'Network', 'Node Lookup Error', req.session.selectedNode);
        return res.status(err.statusCode).json({ message: err.message, error: err.error });
    });
};
export const getAlias = (selNode, peer, id) => {
    const peerId = peer[id];
    if (!peerId) {
        logger.log({ selectedNode: selNode, level: 'ERROR', fileName: 'Network', msg: 'Empty Peer ID' });
        peer.alias = '';
        return Promise.resolve(peer);
    }
    const cached = aliasCache.get(peerId);
    if (cached && (Date.now() - cached.ts) < ALIAS_CACHE_TTL) {
        peer.alias = cached.alias;
        return Promise.resolve(peer);
    }
    // Build a self-contained request from the selected node's own auth options rather than the
    // shared module-level 'options', which is only set by a prior network.ts endpoint call. That
    // coupling meant a cold Peers/route lookup (no prior network call) dereferenced a null 'options'
    // and threw; now that the limiter swallows per-task throws, that surfaced as a 200 with every
    // alias unset (#1501 review F1). selNode.authentication.options is guaranteed present here
    // because every caller runs getOptions() first.
    const nodeOptions = selNode.authentication?.options;
    if (!nodeOptions || !nodeOptions.headers) {
        peer.alias = peerId.substring(0, 20);
        return Promise.resolve(peer);
    }
    const aliasOptions = { ...nodeOptions, method: 'POST', url: selNode.settings.lnServerUrl + '/v1/listnodes', body: { id: peerId }, json: true, qs: {} };
    delete aliasOptions.form;
    return request.post(aliasOptions).then((body) => {
        logger.log({ selectedNode: selNode, level: 'DEBUG', fileName: 'Network', msg: 'Peer Alias Finished', data: body });
        const alias = body.nodes?.[0]?.alias || peerId.substring(0, 20);
        // Re-insert so a refreshed entry moves to the most-recent position, then evict the
        // oldest if we're over the cap (Map preserves insertion order).
        aliasCache.delete(peerId);
        aliasCache.set(peerId, { alias, ts: Date.now() });
        if (aliasCache.size > ALIAS_CACHE_MAX) {
            aliasCache.delete(aliasCache.keys().next().value);
        }
        peer.alias = alias;
        return peer;
    }).catch((errRes) => {
        common.handleError(errRes, 'Network', 'Peer Alias Error', selNode);
        const alias = peerId.substring(0, 20);
        peer.alias = alias;
        return peer;
    });
};