1 files changed, 42 insertions, 0 deletions
diff --git a/src/lib/nip07.ts b/src/lib/nip07.ts
new file mode 100644
index 00000000..9f675950
--- /dev/null
+++ b/src/lib/nip07.ts
@@ -0,0 +1,42 @@
+import { bytesToHex } from '@noble/hashes/utils';
+import { finalizeEvent } from 'nostr-tools/pure';
+import { unwrapEvent } from 'nostr-tools/nip17';
+import { getPrivateKey } from '$lib/nostr';
+import * as libnip44 from '$lib/nip44';
+import { u } from '$lib/nip44';
+
+// Signs an event using NIP-07 if available, otherwise getPrivateKey()
+export const signEvent = async (event: object, user: object): object => {
+    if (await window.nostr.getPublicKey() === user.pubkey) {
+        return window.nostr.signEvent(event);
+    } else {
+        const sk = await getPrivateKey();
+        return finalizeEvent(event, sk);
+    }
+}
+
+// Encrypts an event in NIP-44 using NIP-07 if available, otherwise getPrivateKey()
+export const encrypt = async (json: object, user: object, receiverPK: string): string => {
+    if (await window.nostr.getPublicKey() === user.pubkey) {
+        return window.nostr.nip44.encrypt(
+            receiverPK, JSON.stringify(json));
+    } else {
+        const senderSK = await getPrivateKey();
+        const senderSKString = bytesToHex(senderSK);
+        const ckey = u.getConversationKey(senderSKString, receiverPK);
+        return libnip44.encrypt(JSON.stringify(json), ckey);
+    }
+}
+
+// Decrypts an event in NIP-44 using NIP-07 if available, otherwise getPrivateKey()
+export const decrypt = async (encrypted: string, user: object, receiverPK: string): object => {
+    if (await window.nostr.getPublicKey() === user.pubkey) {
+        return JSON.parse(await window.nostr.nip44.decrypt(
+            receiverPK, encrypted));
+    } else {
+        const senderSK = await getPrivateKey();
+        const senderSKString = bytesToHex(senderSK);
+        const ckey = u.getConversationKey(senderSKString, receiverPK);
+        return JSON.parse(libnip44.decrypt(encrypted, ckey));
+    }
+}