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Channel pagination

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This commit is contained in:
softsimon
2022-05-16 01:36:59 +04:00
parent 11a7babbc4
commit 473cb55dc4
8 changed files with 171 additions and 53 deletions
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31
lightning-backend/src/api/explorer/channels.api.ts
View File

@@ -73,10 +73,16 @@ class ChannelsApi {
}
}
public async $getChannelsForNode(public_key: string): Promise<any> {
public async $getChannelsForNode(public_key: string, index: number, length: number, status: string): Promise<any[]> {
try {
const query = `SELECT n1.alias AS alias_left, n2.alias AS alias_right, channels.*, ns1.channels AS channels_left, ns1.capacity AS capacity_left, ns2.channels AS channels_right, ns2.capacity AS capacity_right FROM channels LEFT JOIN nodes AS n1 ON n1.public_key = channels.node1_public_key LEFT JOIN nodes AS n2 ON n2.public_key = channels.node2_public_key LEFT JOIN node_stats AS ns1 ON ns1.public_key = channels.node1_public_key LEFT JOIN node_stats AS ns2 ON ns2.public_key = channels.node2_public_key WHERE (ns1.id = (SELECT MAX(id) FROM node_stats WHERE public_key = channels.node1_public_key) AND ns2.id = (SELECT MAX(id) FROM node_stats WHERE public_key = channels.node2_public_key)) AND (node1_public_key = ? OR node2_public_key = ?) ORDER BY channels.capacity DESC`;
const [rows]: any = await DB.query(query, [public_key, public_key]);
// Default active and inactive channels
let statusQuery = '< 2';
// Closed channels only
if (status === 'closed') {
statusQuery = '= 2';
}
const query = `SELECT n1.alias AS alias_left, n2.alias AS alias_right, channels.*, ns1.channels AS channels_left, ns1.capacity AS capacity_left, ns2.channels AS channels_right, ns2.capacity AS capacity_right FROM channels LEFT JOIN nodes AS n1 ON n1.public_key = channels.node1_public_key LEFT JOIN nodes AS n2 ON n2.public_key = channels.node2_public_key LEFT JOIN node_stats AS ns1 ON ns1.public_key = channels.node1_public_key LEFT JOIN node_stats AS ns2 ON ns2.public_key = channels.node2_public_key WHERE (ns1.id = (SELECT MAX(id) FROM node_stats WHERE public_key = channels.node1_public_key) AND ns2.id = (SELECT MAX(id) FROM node_stats WHERE public_key = channels.node2_public_key)) AND (node1_public_key = ? OR node2_public_key = ?) AND status ${statusQuery} ORDER BY channels.capacity DESC LIMIT ?, ?`;
const [rows]: any = await DB.query(query, [public_key, public_key, index, length]);
const channels = rows.map((row) => this.convertChannel(row));
return channels;
} catch (e) {
@@ -85,13 +91,30 @@ class ChannelsApi {
}
}
public async $getChannelsCountForNode(public_key: string, status: string): Promise<any> {
try {
// Default active and inactive channels
let statusQuery = '< 2';
// Closed channels only
if (status === 'closed') {
statusQuery = '= 2';
}
const query = `SELECT COUNT(*) AS count FROM channels WHERE (node1_public_key = ? OR node2_public_key = ?) AND status ${statusQuery}`;
const [rows]: any = await DB.query(query, [public_key, public_key]);
return rows[0]['count'];
} catch (e) {
logger.err('$getChannelsForNode error: ' + (e instanceof Error ? e.message : e));
throw e;
}
}
private convertChannel(channel: any): any {
return {
'id': channel.id,
'short_id': channel.short_id,
'capacity': channel.capacity,
'transaction_id': channel.transaction_id,
'transaction_vout': channel.void,
'transaction_vout': channel.transaction_vout,
'updated_at': channel.updated_at,
'created': channel.created,
'status': channel.status,

11
lightning-backend/src/api/explorer/channels.routes.ts
View File

@@ -10,7 +10,7 @@ class ChannelsRoutes {
.get(config.MEMPOOL.API_URL_PREFIX + 'channels/txids', this.$getChannelsByTransactionIds)
.get(config.MEMPOOL.API_URL_PREFIX + 'channels/search/:search', this.$searchChannelsById)
.get(config.MEMPOOL.API_URL_PREFIX + 'channels/:short_id', this.$getChannel)
.get(config.MEMPOOL.API_URL_PREFIX + 'channels', this.$getChannels)
.get(config.MEMPOOL.API_URL_PREFIX + 'channels', this.$getChannelsForNode)
;
}
@@ -36,13 +36,18 @@ class ChannelsRoutes {
}
}
private async $getChannels(req: Request, res: Response) {
private async $getChannelsForNode(req: Request, res: Response) {
try {
if (typeof req.query.public_key !== 'string') {
res.status(501).send('Missing parameter: public_key');
return;
}
const channels = await channelsApi.$getChannelsForNode(req.query.public_key);
const index = parseInt(typeof req.query.index === 'string' ? req.query.index : '0', 10) || 0;
const status: string = typeof req.query.status === 'string' ? req.query.status : '';
const length = 25;
const channels = await channelsApi.$getChannelsForNode(req.query.public_key, index, length, status);
const channelsCount = await channelsApi.$getChannelsCountForNode(req.query.public_key, status);
res.header('X-Total-Count', channelsCount.toString());
res.json(channels);
} catch (e) {
res.status(500).send(e instanceof Error ? e.message : e);