1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
import store from "lib/store";
import config from "config";
import app from "app";
import jwt from "jsonwebtoken";
import { v4 } from "uuid";
import WebSocket from "ws";
import { differenceInSeconds, subSeconds } from "date-fns";
import fastifyWs from "@fastify/websocket";
import whitelist from "./whitelist";
import { l, err, warn } from "lib/logging";
import { getUser } from "lib/utils";
const code = 1000;
const wss = new WebSocket.Server({ clientTracking: false, noServer: true });
const pick = (O, ...K) => K.reduce((o, k) => ((o[k] = O[k]), o), {});
const all = {};
const subscriptions = [];
const lastSeen = {};
export const emit = (uuid, type, data) => {
if (data.uuid !== undefined) data = pick(data, ...whitelist);
if (type === "payment" && data.amount > 0) {
for (let i = subscriptions.length - 1; i >= 0; i--) {
let s = subscriptions[i];
if (s.invoice.id === data.invoice_id) {
s.ws.send(JSON.stringify({ type, data }));
}
}
}
if (!store.sockets[uuid]) return;
for (let id in store.sockets[uuid]) {
const ws = store.sockets[uuid][id];
ws.send(JSON.stringify({ type, data }));
}
};
export const broadcast = (type, data) => {
const sent = [];
for (const uuid in store.sockets) {
for (const id in store.sockets[uuid]) {
const ws = store.sockets[uuid][id];
ws.send(JSON.stringify({ type, data }));
sent.push(ws.id);
}
}
Object.values(all).map(ws => {
if (!sent.includes(ws.id)) ws.send(JSON.stringify({ type, data }));
});
};
function subtractSeconds(numOfSeconds, date = new Date()) {
date.setSeconds(date.getSeconds() - numOfSeconds);
return date;
}
app.register(fastifyWs);
app.register(async function(app) {
app.get("/ws", { websocket: true }, ({ socket: ws }, req) => {
const id = v4();
ws.id = id;
ws.beats = 0;
ws.send(JSON.stringify({ type: "connected", data: id }));
all[id] = ws;
ws.on("message", async message => {
let type, data;
try {
({ type, data } = JSON.parse(message));
} catch (e) {
err("coudn't parse socket message");
}
switch (type) {
case "heartbeat":
ws.beats = 0;
ws.send(JSON.stringify({ type: "id", data: ws.id }));
break;
case "login":
let token = data;
if (lastSeen[token] > subtractSeconds(5)) return;
lastSeen[token] = new Date();
try {
if (!token || token === "null" || !jwt.decode(token))
return ws.close(code, `bad token ${token}`);
let { uuid } = jwt.decode(token);
if (!uuid) throw new Error("Invalid JWT token");
console.log("UUID", uuid)
let user = await getUser(uuid);
if (!user) throw new Error("User not found");
if (!store.sockets[uuid]) store.sockets[uuid] = {};
const existing = Object.keys(store.sockets[uuid]);
if (existing.length > 4) {
const p = existing.find(sid => sid !== id);
store.sockets[uuid][p].send(JSON.stringify({ type: "logout" }));
setTimeout(() => {
if (store.sockets[uuid][p])
store.sockets[uuid][p].close(code, "too many sockets");
}, 5000);
}
store.sockets[uuid][id] = ws;
names[id] = uuid;
ws.user = user;
ws.send(
JSON.stringify({ type: "login", data: pick(user, ...whitelist) })
);
ws.send(
JSON.stringify({ type: "version", data: config.clientVersion })
);
} catch (e) {
console.log(e)
err("caught socket error", e.message);
if (e.message.includes("not found"))
ws.send(JSON.stringify({ type: "logout" }));
setTimeout(
() => ws && ws.close(code, `closing due to error ${e.message}`),
1000
);
}
break;
case "token":
if (!ws.user) return;
ws.token = data;
break;
case "lnurl":
store.sessions[data] = ws;
break;
case "subscribe":
subscriptions.push({ invoice: data, ws });
break;
default:
warn("received socket message of unknown type", type, data);
}
});
ws.on("close", function(code, reason) {
try {
const uuid = names[id];
if (store.sockets[uuid] && store.sockets[uuid][id]) {
delete store.sockets[uuid][id];
}
if (all[id]) delete all[id];
} catch (e) {
err("problem closing socket", e.message);
}
});
});
});
const names = {};
setInterval(() => {
for (const uuid in store.sockets) {
for (const id in store.sockets[uuid]) {
let ws = store.sockets[uuid][id];
ws.beats++;
if (ws.beats > 10) ws.close(code, `${uuid} ${id} lost heartbeat`);
}
}
}, 2000);
|
