| 1 | #!/usr/bin/env node |
| 2 | // Local-only NIP-46 signer fixture for browser suspension and recovery checks. |
| 3 | // It exposes a tiny Nostr relay and a deterministic remote signer. The control |
| 4 | // endpoint deliberately drops transport connections so a browser can exercise |
| 5 | // its lost-signer and reconnect states without a phone or external relay. |
| 6 | import { createServer } from "node:http" ; |
| 7 | import { WebSocketServer, WebSocket } from "ws" ; |
| 8 | import { finalizeEvent, getPublicKey, verifyEvent } from "nostr-tools/pure" ; |
| 9 | import { BunkerSigner } from "nostr-tools/nip46" ; |
| 10 | import * as nip44 from "nostr-tools/nip44" ; |
| 11 | |
| 12 | const relayPort = Number(process.env.SIGNER_RELAY_PORT ?? 18471); |
| 13 | const controlPort = Number(process.env.SIGNER_CONTROL_PORT ?? 18472); |
| 14 | if (!Number.isInteger(relayPort) || !Number.isInteger(controlPort)) throw Error("ports must be integers" ); |
| 15 | |
| 16 | const key = n => Uint8Array.from(Buffer.from(String(n).padStart(64, "0" ), "hex" )); |
| 17 | // These are the public QA identities used by scripts/qa/buzz-chat-fixture.mjs. |
| 18 | const phoneSecret = key(process.env.SIGNER_PHONE_SECRET ?? "1" ); |
| 19 | const serviceSecret = key(process.env.SIGNER_SERVICE_SECRET ?? "4" ); |
| 20 | const clientSecret = key(process.env.SIGNER_CLIENT_SECRET ?? "5" ); |
| 21 | const phonePubkey = getPublicKey(phoneSecret); |
| 22 | const servicePubkey = getPublicKey(serviceSecret); |
| 23 | const clientPubkey = getPublicKey(clientSecret); |
| 24 | const relayURL = `ws://127.0.0.1:${relayPort}` ; |
| 25 | const events = []; |
| 26 | const peers = new Map(); |
| 27 | let offline = false; |
| 28 | |
| 29 | const matches = (event, filter) => { |
| 30 | if (filter.ids && !filter.ids.includes(event.id)) return false; |
| 31 | if (filter.kinds && !filter.kinds.includes(event.kind)) return false; |
| 32 | if (filter.authors && !filter.authors.includes(event.pubkey)) return false; |
| 33 | if (filter.since && event.created_at < filter.since) return false; |
| 34 | if (filter.until && event.created_at > filter.until) return false; |
| 35 | for (const [name, values] of Object.entries(filter)) { |
| 36 | if (name.startsWith("#" ) && !event.tags.some(tag => tag[0] === name.slice(1) && values.includes(tag[1]))) return false; |
| 37 | } |
| 38 | return true; |
| 39 | }; |
| 40 | const send = (socket, value) => { |
| 41 | if (socket.readyState === WebSocket.OPEN) socket.send(JSON.stringify(value)); |
| 42 | }; |
| 43 | const broadcast = event => { |
| 44 | events.push(event); |
| 45 | for (const [socket, subscriptions] of peers) { |
| 46 | for (const [id, filters] of subscriptions) { |
| 47 | if (filters.some(filter => matches(event, filter))) send(socket, ["EVENT" , id, event]); |
| 48 | } |
| 49 | } |
| 50 | }; |
| 51 | |
| 52 | const relay = new WebSocketServer({ host: "127.0.0.1" , port: relayPort }); |
| 53 | relay.on("connection" , socket => { |
| 54 | if (offline) { |
| 55 | socket.close(1013, "fixture offline" ); |
| 56 | return; |
| 57 | } |
| 58 | const subscriptions = new Map(); |
| 59 | peers.set(socket, subscriptions); |
| 60 | socket.on("message" , raw => { |
| 61 | if (offline) return; |
| 62 | let message; |
| 63 | try { message = JSON.parse(raw); } catch { return; } |
| 64 | if (message[0] === "REQ" ) { |
| 65 | const [id, ...filters] = message.slice(1); |
| 66 | subscriptions.set(id, filters); |
| 67 | for (const event of events) if (filters.some(filter => matches(event, filter))) send(socket, ["EVENT" , id, event]); |
| 68 | send(socket, ["EOSE" , id]); |
| 69 | } else if (message[0] === "EVENT" && message[1]) { |
| 70 | const event = message[1]; |
| 71 | if (verifyEvent(event)) { |
| 72 | broadcast(event); |
| 73 | send(socket, ["OK" , event.id, true, "" ]); |
| 74 | } else send(socket, ["OK" , event.id, false, "invalid event" ]); |
| 75 | } else if (message[0] === "CLOSE" ) subscriptions.delete(message[1]); |
| 76 | }); |
| 77 | socket.on("close" , () => peers.delete(socket)); |
| 78 | }); |
| 79 | |
| 80 | const reply = (requestEvent, request) => { |
| 81 | const conversation = nip44.getConversationKey(serviceSecret, requestEvent.pubkey); |
| 82 | const result = (() => { |
| 83 | switch (request.method) { |
| 84 | case "connect" : return "ack" ; |
| 85 | case "ping" : return "pong" ; |
| 86 | case "get_public_key" : return phonePubkey; |
| 87 | case "sign_event" : return JSON.stringify(finalizeEvent(JSON.parse(request.params[0]), phoneSecret)); |
| 88 | case "nip44_encrypt" : return nip44.encrypt(request.params[1], nip44.getConversationKey(phoneSecret, request.params[0])); |
| 89 | case "nip44_decrypt" : return nip44.decrypt(request.params[1], nip44.getConversationKey(phoneSecret, request.params[0])); |
| 90 | default: throw Error("unsupported method " + request.method); |
| 91 | } |
| 92 | })(); |
| 93 | broadcast(finalizeEvent({ |
| 94 | kind: 24133, |
| 95 | tags: [["p" , requestEvent.pubkey]], |
| 96 | content: nip44.encrypt(JSON.stringify({ id: request.id, result }), conversation), |
| 97 | created_at: Math.floor(Date.now() / 1000) |
| 98 | }, serviceSecret)); |
| 99 | }; |
| 100 | |
| 101 | const handled = new Set(); |
| 102 | const requestPoller = setInterval(() => { |
| 103 | if (offline) return; |
| 104 | for (const event of events) { |
| 105 | if (event.kind !== 24133 || event.pubkey !== clientPubkey || !event.tags.some(tag => tag[0] === "p" && tag[1] === servicePubkey) || handled.has(event)) continue; |
| 106 | handled.add(event); |
| 107 | try { |
| 108 | const conversation = nip44.getConversationKey(serviceSecret, event.pubkey); |
| 109 | reply(event, JSON.parse(nip44.decrypt(event.content, conversation))); |
| 110 | } catch (error) { console.error("signer request failed:" , error.message); } |
| 111 | } |
| 112 | }, 25); |
| 113 | |
| 114 | const control = createServer((request, response) => { |
| 115 | if (request.method !== "POST" || !["/offline" , "/online" ].includes(request.url)) { |
| 116 | response.writeHead(404, { "content-type" : "text/plain" }); |
| 117 | response.end("use POST /offline or POST /online\n" ); |
| 118 | return; |
| 119 | } |
| 120 | offline = request.url === "/offline" ; |
| 121 | if (offline) for (const socket of peers.keys()) socket.close(1013, "fixture offline" ); |
| 122 | response.writeHead(200, { "content-type" : "application/json" }); |
| 123 | response.end(JSON.stringify({ offline })); |
| 124 | }); |
| 125 | |
| 126 | const clientPointer = { pubkey: servicePubkey, relays: [relayURL] }; |
| 127 | const runSelfTest = async () => { |
| 128 | const signer = BunkerSigner.fromBunker(clientSecret, clientPointer); |
| 129 | await signer.connect({ name: "tinyrelay signer resume fixture" }); |
| 130 | if ((await signer.getPublicKey()) !== phonePubkey) throw Error("unexpected signer identity" ); |
| 131 | const signed = await signer.signEvent({ kind: 1, content: "local signer fixture" , tags: [], created_at: 1 }); |
| 132 | if (!verifyEvent(signed) || signed.pubkey !== phonePubkey) throw Error("signer returned invalid event" ); |
| 133 | await signer.close(); |
| 134 | signer.pool.destroy(); |
| 135 | console.log("self-test: connect, get_public_key and sign_event passed" ); |
| 136 | }; |
| 137 | |
| 138 | control.listen(controlPort, "127.0.0.1" , async () => { |
| 139 | console.log(JSON.stringify({ |
| 140 | relay: relayURL, |
| 141 | control: `http://127.0.0.1:${controlPort}` , |
| 142 | bunker: `bunker://${servicePubkey}?relay=${encodeURIComponent(relayURL)}` , |
| 143 | phonePubkey, |
| 144 | servicePubkey, |
| 145 | clientPubkey, |
| 146 | localOnly: true, |
| 147 | controls: ["POST /offline" , "POST /online" ] |
| 148 | }, null, 2)); |
| 149 | try { await runSelfTest(); } catch (error) { console.error("self-test failed:" , error); process.exitCode = 1; } |
| 150 | }); |
| 151 | |
| 152 | const stop = () => { |
| 153 | clearInterval(requestPoller); |
| 154 | for (const socket of peers.keys()) socket.terminate(); |
| 155 | control.close(); |
| 156 | relay.close(); |
| 157 | }; |
| 158 | process.once("SIGINT" , stop); |
| 159 | process.once("SIGTERM" , stop); |