Add support for nip44

nip44.test.ts

@@ -0,0 +1,19 @@
+import crypto from 'node:crypto'
+
+import {encrypt, decrypt} from './nip44.ts'
+import {getPublicKey, generatePrivateKey} from './keys.ts'
+
+// @ts-ignore
+// eslint-disable-next-line no-undef
+globalThis.crypto = crypto
+
+test('encrypt and decrypt message', async () => {
+  let sk1 = generatePrivateKey()
+  let sk2 = generatePrivateKey()
+  let pk1 = getPublicKey(sk1)
+  let pk2 = getPublicKey(sk2)
+
+  expect(await decrypt(sk2, pk1, await encrypt(sk1, pk2, 'hello'))).toEqual(
+    'hello'
+  )
+})