Nostr dm notifications (#3473)
* Add nostr DM notification provider * require crypto for node 18 compatibility * remove whitespace Co-authored-by: Frank Elsinga <frank@elsinga.de> * move closer to where it is used * simplify success or failure logic * don't clobber the non-alert msg * Update server/notification-providers/nostr.js Co-authored-by: Frank Elsinga <frank@elsinga.de> * polyfills required for node <= 18 * resolve linter warnings * missing comma * better websocket polyfill, update deprecated function * add conditional polyfills for node versions * lint * use correct npm for package-lock --------- Co-authored-by: Frank Elsinga <frank@elsinga.de> Co-authored-by: Louis Lam <louislam@users.noreply.github.com>pull/3318/head
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const { log } = require("../../src/util");
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const NotificationProvider = require("./notification-provider");
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const {
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relayInit,
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getPublicKey,
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getEventHash,
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getSignature,
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nip04,
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nip19
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} = require("nostr-tools");
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// polyfills for node versions
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const semver = require("semver");
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const nodeVersion = process.version;
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if (semver.lt(nodeVersion, "16.0.0")) {
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log.warn("monitor", "Node <= 16 is unsupported for nostr, sorry :(");
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} else if (semver.lt(nodeVersion, "18.0.0")) {
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// polyfills for node 16
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global.crypto = require("crypto");
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global.WebSocket = require("isomorphic-ws");
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if (typeof crypto !== "undefined" && !crypto.subtle && crypto.webcrypto) {
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crypto.subtle = crypto.webcrypto.subtle;
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}
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} else if (semver.lt(nodeVersion, "20.0.0")) {
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// polyfills for node 18
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global.crypto = require("crypto");
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global.WebSocket = require("isomorphic-ws");
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} else {
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// polyfills for node 20
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global.WebSocket = require("isomorphic-ws");
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}
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class Nostr extends NotificationProvider {
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name = "nostr";
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async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
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// All DMs should have same timestamp
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const createdAt = Math.floor(Date.now() / 1000);
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const senderPrivateKey = await this.getPrivateKey(notification.sender);
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const senderPublicKey = getPublicKey(senderPrivateKey);
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const recipientsPublicKeys = await this.getPublicKeys(notification.recipients);
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// Create NIP-04 encrypted direct message event for each recipient
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const events = [];
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for (const recipientPublicKey of recipientsPublicKeys) {
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const ciphertext = await nip04.encrypt(senderPrivateKey, recipientPublicKey, msg);
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let event = {
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kind: 4,
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pubkey: senderPublicKey,
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created_at: createdAt,
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tags: [[ "p", recipientPublicKey ]],
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content: ciphertext,
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};
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event.id = getEventHash(event);
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event.sig = getSignature(event, senderPrivateKey);
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events.push(event);
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}
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// Publish events to each relay
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const relays = notification.relays.split("\n");
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let successfulRelays = 0;
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// Connect to each relay
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for (const relayUrl of relays) {
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const relay = relayInit(relayUrl);
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try {
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await relay.connect();
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successfulRelays++;
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// Publish events
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for (const event of events) {
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relay.publish(event);
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}
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} catch (error) {
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continue;
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} finally {
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relay.close();
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}
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}
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// Report success or failure
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if (successfulRelays === 0) {
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throw Error("Failed to connect to any relays.");
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}
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return `${successfulRelays}/${relays.length} relays connected.`;
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}
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async getPrivateKey(sender) {
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try {
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const senderDecodeResult = await nip19.decode(sender);
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const { data } = senderDecodeResult;
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return data;
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} catch (error) {
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throw new Error(`Failed to get private key: ${error.message}`);
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}
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}
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async getPublicKeys(recipients) {
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const recipientsList = recipients.split("\n");
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const publicKeys = [];
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for (const recipient of recipientsList) {
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try {
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const recipientDecodeResult = await nip19.decode(recipient);
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const { type, data } = recipientDecodeResult;
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if (type === "npub") {
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publicKeys.push(data);
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} else {
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throw new Error("not an npub");
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}
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} catch (error) {
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throw new Error(`Error decoding recipient: ${error}`);
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}
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}
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return publicKeys;
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}
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}
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module.exports = Nostr;
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@ -0,0 +1,26 @@
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<template>
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<div class="mb-3">
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<label for="nostr-relays" class="form-label">{{ $t("nostrRelays") }}<span style="color: red;"><sup>*</sup></span></label>
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<textarea id="nostr-relays" v-model="$parent.notification.relays" class="form-control" :required="true" placeholder="wss://127.0.0.1:7777/"></textarea>
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<small class="form-text text-muted">{{ $t("nostrRelaysHelp") }}</small>
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</div>
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<div class="mb-3">
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<label for="nostr-sender" class="form-label">{{ $t("nostrSender") }}<span style="color: red;"><sup>*</sup></span></label>
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<HiddenInput id="nostr-sender" v-model="$parent.notification.sender" autocomplete="new-password" :required="true"></HiddenInput>
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</div>
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<div class="mb-3">
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<label for="nostr-recipients" class="form-label">{{ $t("nostrRecipients") }}<span style="color: red;"><sup>*</sup></span></label>
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<textarea id="nostr-recipients" v-model="$parent.notification.recipients" class="form-control" :required="true" placeholder="npub123... npub789..."></textarea>
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<small class="form-text text-muted">{{ $t("nostrRecipientsHelp") }}</small>
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</div>
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</template>
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<script>
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import HiddenInput from "../HiddenInput.vue";
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export default {
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components: {
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HiddenInput,
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},
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};
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</script>
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