Persist NIP-07 permissions between sessions

js/nostr.js

@@ -3175,7 +3175,23 @@ export class NostrClient {
     this.watchHistoryLastCreatedAt = 0;
     this.countRequestCounter = 0;
     this.countUnsupportedRelays = new Set();
-    const storedPermissions = readStoredNip07Permissions();
+    let storedPermissions = null;
+    const hasLocalStorage =
+      (typeof window !== "undefined" &&
+        window &&
+        typeof window.localStorage !== "undefined") ||
+      (typeof globalThis !== "undefined" &&
+        globalThis &&
+        typeof globalThis.localStorage !== "undefined");
+
+    if (hasLocalStorage) {
+      try {
+        storedPermissions = readStoredNip07Permissions();
+      } catch (error) {
+        storedPermissions = null;
+      }
+    }
+
     this.extensionPermissionCache =
       storedPermissions instanceof Set ? storedPermissions : new Set();
   }

tests/watch-history.test.mjs

@@ -968,7 +968,18 @@ async function testEnsureExtensionPermissionCaching() {
   const actor = "permission-actor";
   const extension = installExtensionCrypto({ actor });
   const previousCache = nostrClient.extensionPermissionCache;
+  let previousStoredPermissions = null;
+  if (typeof localStorage !== "undefined" && localStorage) {
+    try {
+      previousStoredPermissions = localStorage.getItem(
+        NIP07_PERMISSIONS_STORAGE_KEY,
+      );
+    } catch (error) {
+      previousStoredPermissions = null;
+    }
+  }
   nostrClient.extensionPermissionCache = new Set();
+  clearStoredExtensionPermissions();
 
   try {
     const first = await nostrClient.ensureExtensionPermissions([
@@ -998,6 +1009,20 @@ async function testEnsureExtensionPermissionCaching() {
   } finally {
     extension.restore();
     nostrClient.extensionPermissionCache = previousCache;
+    if (typeof localStorage !== "undefined" && localStorage) {
+      try {
+        if (previousStoredPermissions && previousStoredPermissions.length) {
+          localStorage.setItem(
+            NIP07_PERMISSIONS_STORAGE_KEY,
+            previousStoredPermissions,
+          );
+        } else {
+          clearStoredExtensionPermissions();
+        }
+      } catch (error) {
+        // ignore restore errors in tests
+      }
+    }
   }
 }