move nostr-sdk repository into here because why not?

keyring/bunker.go

@@ -0,0 +1,39 @@
+package keyring
+
+import (
+	"context"
+	"time"
+
+	"github.com/nbd-wtf/go-nostr"
+	"github.com/nbd-wtf/go-nostr/nip46"
+)
+
+// BunkerSigner is a signer that asks a bunker using NIP-46 every time it needs to do an operation.
+type BunkerSigner struct {
+	bunker *nip46.BunkerClient
+}
+
+func NewBunkerSignerFromBunkerClient(bc *nip46.BunkerClient) BunkerSigner {
+	return BunkerSigner{bc}
+}
+
+func (bs BunkerSigner) GetPublicKey(ctx context.Context) string {
+	ctx, cancel := context.WithTimeout(ctx, time.Second*30)
+	defer cancel()
+	pk, _ := bs.bunker.GetPublicKey(ctx)
+	return pk
+}
+
+func (bs BunkerSigner) SignEvent(ctx context.Context, evt *nostr.Event) error {
+	ctx, cancel := context.WithTimeout(ctx, time.Second*30)
+	defer cancel()
+	return bs.bunker.SignEvent(ctx, evt)
+}
+
+func (bs BunkerSigner) Encrypt(ctx context.Context, plaintext string, recipient string) (string, error) {
+	return bs.bunker.NIP44Encrypt(ctx, recipient, plaintext)
+}
+
+func (bs BunkerSigner) Decrypt(ctx context.Context, base64ciphertext string, sender string) (plaintext string, err error) {
+	return bs.bunker.NIP44Encrypt(ctx, sender, base64ciphertext)
+}