fix(nostr-client): reject non-ws(s):// relays in the spire seed

The npubs in the seed are bech32-checksummed, so a mis-scanned character is
caught — but the relay strings are raw inside the base64. A QR misread silently
turned `ws://192.168.0.32:5001/...` into `As://192.168.0.32:5001/...`, which
parsed fine and then crash-looped the machine on an unreachable NIP-46 relay.

Validate every `relays[]` entry (and `bunker_relay`) is a `ws://`/`wss://` URL
at parse time, so a garbled scan is rejected as an invalid seed instead of
persisted. Part of bitspire-#70 pairing robustness.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

packages/nostr-client/src/__tests__/seed.test.ts

@@ -80,7 +80,10 @@ describe('parseSpireSeed', () => {
     ['missing bunker_secret', { ...VALID, bunker_secret: undefined }],
     ['empty relays', { ...VALID, relays: [] }],
     ['non-string relay', { ...VALID, relays: [123] }],
+    ['non-ws relay (scan corruption ws://→As://)', { ...VALID, relays: ['As://events.relay/'] }],
+    ['non-ws relay (http)', { ...VALID, relays: ['http://events.relay/'] }],
     ['empty bunker_relay', { ...VALID, bunker_relay: '' }],
+    ['non-ws bunker_relay', { ...VALID, bunker_relay: 'As://bunker.relay/' }],
   ])('rejects %s', (_label, json) => {
     expect(() => parseSpireSeed(makeSeed(json))).toThrow()
   })

packages/nostr-client/src/seed.ts

@@ -53,6 +53,20 @@ export interface SpireSeed {
 
 const HEX64 = /^[0-9a-f]{64}$/
 
+/**
+ * A relay must be a `ws://` or `wss://` URL. Unlike the npubs (bech32-checksummed,
+ * so a mis-scanned character is caught), the relay strings are raw inside the
+ * seed's base64 — a QR misread can silently corrupt `ws://` into e.g. `As://`
+ * and the pairing then crash-loops on an unreachable relay. Reject at parse time
+ * so the wizard refuses a garbled scan instead of persisting it (bitspire#70).
+ */
+const WS_URL = /^wss?:\/\/[^\s]+$/
+function assertRelayUrl(value: string, field: string): void {
+  if (!WS_URL.test(value)) {
+    throw new Error(`parseSpireSeed: ${field} must be a ws:// or wss:// URL (got "${value}")`)
+  }
+}
+
 /** Decode an unpadded base64url string in both browser and Node. */
 function base64urlDecode(input: string): string {
   const padded = input.replace(/-/g, '+').replace(/_/g, '/').padEnd(Math.ceil(input.length / 4) * 4, '=')
@@ -118,6 +132,7 @@ export function parseSpireSeed(seedUrl: string): SpireSeed {
   if (!Array.isArray(relays) || relays.length === 0 || !relays.every((r) => typeof r === 'string')) {
     throw new Error('parseSpireSeed: relays must be a non-empty string array')
   }
+  relays.forEach((r, i) => assertRelayUrl(r as string, `relays[${i}]`))
 
   // Optional bunker relay; default to the first event relay. Keeps the common
   // case (bunker on the same relay) one field lighter, while still allowing a
@@ -127,6 +142,7 @@ export function parseSpireSeed(seedUrl: string): SpireSeed {
     if (typeof obj.bunker_relay !== 'string' || obj.bunker_relay.length === 0) {
       throw new Error('parseSpireSeed: bunker_relay, if present, must be a non-empty string')
     }
+    assertRelayUrl(obj.bunker_relay, 'bunker_relay')
     bunkerRelay = obj.bunker_relay
   }