nip04 support!

Shared (Extension)/Resources/background.js

@@ -1,4 +1,4 @@
-import { generatePrivateKey, getPublicKey, signEvent } from "nostr-tools";
+import { generatePrivateKey, getPublicKey, signEvent, nip04 } from "nostr-tools";
 
 const storage = browser.storage.local;
 
@@ -53,6 +53,14 @@ browser.runtime.onMessage.addListener(async (message, _sender, sendResponse) =>
             let event = await signEvent_(message.payload);
             sendResponse(event);
             break;
+        case 'nip04.encrypt':
+            let cipherText = await nip04Encrypt(message.payload);
+            sendResponse(cipherText);
+            break;
+        case 'nip04.decrypt':
+            let plainText = await nip04Decrypt(message.payload);
+            sendResponse(plainText);
+            break;
         default:
             break;
     }
@@ -145,3 +153,13 @@ async function signEvent_(event) {
     event.sig = signEvent(event, privKey);
     return event;
 }
+
+async function nip04Encrypt({pubKey, plainText}) {
+    let privKey = await getPrivKey();
+    return nip04.encrypt(privKey, pubKey, plainText);
+}
+
+async function nip04Decrypt({pubKey, cipherText}) {
+    let privKey = await getPrivKey();
+    return nip04.decrypt(privKey, pubKey, cipherText);
+}

Shared (Extension)/Resources/content.js

@@ -3,8 +3,9 @@ script.setAttribute('src', browser.runtime.getURL('nostr.build.js'));
 document.body.appendChild(script);
 
 window.addEventListener('message', async (message) => {
+  const validEvents = ['getPubKey', 'signEvent', 'nip04.encrypt', 'nip04.decrypt'];
   let {kind, reqId, payload} = message.data;
-  if (kind !== 'getPubKey' && kind !== 'signEvent')
+  if (!validEvents.includes(kind))
     return;
   
   console.log(`Event ${reqId}: Content script received message kind ${kind}, payload: `, payload);

Shared (Extension)/Resources/nostr.js

@@ -16,13 +16,25 @@ window.nostr = {
             console.log(`Event ${reqId}: ${kind}, payload: `, payload);
             window.postMessage({kind, reqId, payload}, '*');
         });
+    },
+
+
+    nip04: {
+        async encrypt(pubKey, plainText) {
+            return await window.nostr.broadcast('nip04.encrypt', {pubKey, plainText});
+        },
+
+        async decrypt(pubKey, cipherText) {
+            return await window.nostr.broadcast('nip04.decrypt', {pubKey, cipherText});
+        }
     }
 }
 
 window.addEventListener('message', (message) => {
+    const validEvents = ['getPubKey', 'signEvent', 'nip04.encrypt', 'nip04.decrypt'].map(e => `return_${e}`);
     let {kind, reqId, payload} = message.data;
 
-    if (kind !== 'return_getPubKey' && kind !== 'return_signEvent')
+    if (!validEvents.includes(kind))
         return;
     
     console.log(`Event ${reqId}: Received payload:`, payload);