Find inactive channels with dead nodes.

lightning-backend/src/api/explorer/nodes.api.ts

@@ -38,7 +38,7 @@ class NodesApi {
   public async $getLatestStatistics(): Promise<any> {
     try {
       const [rows]: any = await DB.query(`SELECT * FROM statistics ORDER BY id DESC LIMIT 1`);
-      const [rows2]: any = await DB.query(`SELECT * FROM statistics ORDER BY id DESC LIMIT 1 OFFSET 71`);
+      const [rows2]: any = await DB.query(`SELECT * FROM statistics ORDER BY id DESC LIMIT 1 OFFSET 72`);
       return {
         latest: rows[0],
         previous: rows2[0],

lightning-backend/src/server.ts

@@ -3,8 +3,8 @@ import * as express from 'express';
 import * as http from 'http';
 import logger from './logger';
 import config from './config';
-import nodesRoutes from './api/nodes/nodes.routes';
-import channelsRoutes from './api/nodes/channels.routes';
+import nodesRoutes from './api/explorer/nodes.routes';
+import channelsRoutes from './api/explorer/channels.routes';
 
 class Server {
   private server: http.Server | undefined;

lightning-backend/src/tasks/node-sync.service.ts

@@ -3,7 +3,7 @@ import DB from '../database';
 import logger from '../logger';
 import lightningApi from '../api/lightning/lightning-api-factory';
 import { ILightningApi } from '../api/lightning/lightning-api.interface';
-import channelsApi from '../api/nodes/channels.api';
+import channelsApi from '../api/explorer/channels.api';
 import bitcoinClient from '../api/bitcoin/bitcoin-client';
 
 class NodeSyncService {
@@ -33,6 +33,7 @@ class NodeSyncService {
         await this.$saveChannel(channel);
       }
 
+      await this.$findInactiveNodesAndChannels();
       await this.$scanForClosedChannels();
 
     } catch (e) {
@@ -40,7 +41,21 @@ class NodeSyncService {
     }
   }
 
-  private async $scanForClosedChannels() {
+  // Looking for channels whos nodes are inactive
+  private async $findInactiveNodesAndChannels(): Promise<void> {
+    try {
+      // @ts-ignore
+      const [channels]: [ILightningApi.Channel[]] = await DB.query(`SELECT channels.id FROM channels WHERE channels.status = 1 AND ((SELECT COUNT(*) FROM nodes WHERE nodes.public_key = channels.node1_public_key) = 0 OR (SELECT COUNT(*) FROM nodes WHERE nodes.public_key = channels.node2_public_key) = 0)`);
+
+      for (const channel of channels) {
+        await this.$updateChannelStatus(channel.id, 0);
+      }
+    } catch (e) {
+      logger.err('$findInactiveNodesAndChannels() error: ' + (e instanceof Error ? e.message : e));
+    }
+  }
+
+  private async $scanForClosedChannels(): Promise<void> {
     try {
       const channels = await channelsApi.$getChannelsByStatus(0);
       for (const channel of channels) {
@@ -152,6 +167,14 @@ class NodeSyncService {
     }
   }
 
+  private async $updateChannelStatus(channelShortId: string, status: number): Promise<void> {
+    try {
+      await DB.query(`UPDATE channels SET status = ? WHERE id = ?`, [status, channelShortId]);
+    } catch (e) {
+      logger.err('$updateChannelStatus() error: ' + (e instanceof Error ? e.message : e));
+    }
+  }
+
   private async $setChannelsInactive(): Promise<void> {
     try {
       await DB.query(`UPDATE channels SET status = 0 WHERE status = 1`);