feat: add NIP-04 encrypt/decrypt methods on Key

1 files changed, 49 insertions, 0 deletions

diff --git a/nip04_test.go b/nip04_test.go
new file mode 100644
index 0000000..ff06151
--- /dev/null
+++ b/nip04_test.go
@@ -0,0 +1,49 @@
+package nostr
+
+import (
+        "testing"
+)
+
+func TestNIP04RoundTrip(t *testing.T) {
+        alice, err := GenerateKey()
+        if err != nil {
+                t.Fatal(err)
+        }
+        bob, err := GenerateKey()
+        if err != nil {
+                t.Fatal(err)
+        }
+
+        plaintext := "hello, private world!"
+
+        ct, err := alice.NIP04Encrypt(bob.Public(), plaintext)
+        if err != nil {
+                t.Fatalf("encrypt: %v", err)
+        }
+
+        got, err := bob.NIP04Decrypt(alice.Public(), ct)
+        if err != nil {
+                t.Fatalf("decrypt: %v", err)
+        }
+
+        if got != plaintext {
+                t.Fatalf("expected %q, got %q", plaintext, got)
+        }
+}
+
+func TestNIP04DifferentKeys(t *testing.T) {
+        alice, _ := GenerateKey()
+        bob, _ := GenerateKey()
+        eve, _ := GenerateKey()
+
+        ct, err := alice.NIP04Encrypt(bob.Public(), "secret")
+        if err != nil {
+                t.Fatal(err)
+        }
+
+        // Eve should not be able to decrypt
+        _, err = eve.NIP04Decrypt(alice.Public(), ct)
+        if err == nil {
+                t.Fatal("expected error decrypting with wrong key, got nil")
+        }
+}