Add nostr settings

src/lib/index.ts

@@ -1 +1,44 @@
-// place files you want to import through the `$lib` alias in this folder.
+import * as nip19 from 'nostr-tools/nip19';
+import { Relay } from 'nostr-tools';
+
+/**
+ * Validates if the given npub is a valid Nostr Public Key.
+ * @param npub - The npub (Nostr Public Key) to validate.
+ * @returns A boolean indicating if the npub is valid.
+ */
+const isValidNpub = (npub: string): boolean => {
+	try {
+		// Decode the npub using NIP-19
+		const { type, data } = nip19.decode(npub);
+		// Check if the type is 'npub' and the data length is 32 bytes
+		return type === 'npub' && data.length === 64;
+	} catch (e) {
+		// If any error is thrown, the npub is not valid
+		return false;
+	}
+};
+
+/**
+ * Validates if the given URL is a valid Nostr relay.
+ * @param url - The URL of the Nostr relay to validate.
+ * @returns A Promise<boolean> indicating if the URL is a valid Nostr relay.
+ */
+const isValidNostrRelay = async (url: string): Promise<boolean> => {
+	try {
+		const relay: Relay = await Relay.connect(url);
+
+		// If the relay is successfully connected, it's a valid Nostr relay
+		if (relay.connected) {
+			// Close the connection to clean up
+			relay.close();
+			return true;
+		}
+
+		return false;
+	} catch (e) {
+		// If any error is thrown, the URL is not a valid Nostr relay
+		return false;
+	}
+};
+
+export { isValidNpub, isValidNostrRelay };

src/lib/locales/en.json

@@ -36,7 +36,9 @@
 			"flFlashOnUpd": "Frontlight flash on new block",
 			"mempoolInstanceHelpText": "Only effective when BTClock data-source is disabled. A restart is required to apply.",
 			"luxLightToggle": "Auto toggle frontlight at lux",
-			"wpTimeout": "WiFi-config portal timeout"
+			"wpTimeout": "WiFi-config portal timeout",
+			"nostrPubKey": "Nostr source pubkey",
+			"nostrRelay": "Nostr Relay"
 		},
 		"control": {
 			"systemInfo": "System info",