Add nwc command

main.go

@@ -47,6 +47,7 @@ var app = &cli.Command{
 		curl,
 		fsCmd,
 		publish,
+		nwc,
 	},
 	Version: version,
 	Flags: []cli.Flag{

nip47.go

@@ -0,0 +1,96 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+	"strings"
+
+	"fiatjaf.com/nostr"
+	"github.com/urfave/cli/v3"
+)
+
+var nwc = &cli.Command{
+	Name:                      "nwc",
+	Usage:                     "nip47 stuff",
+	DisableSliceFlagSeparator: true,
+	Flags: []cli.Flag{
+		&cli.StringFlag{
+			Name:     "url",
+			Usage:    "url that starts with nostr+walletconnect://",
+			Required: true,
+		},
+	},
+	Commands: []*cli.Command{
+		{
+			Name:  "info",
+			Usage: "get info event (kind 13194)",
+			Action: func(ctx context.Context, c *cli.Command) error {
+				walletURL := c.String("url")
+
+				relay, walletPubkey, _, err := parseWalletConnectURL(walletURL)
+				if err != nil {
+					return fmt.Errorf("failed to parse url: %w", err)
+				}
+
+				r, err := nostr.RelayConnect(ctx, relay, nostr.RelayOptions{})
+				if err != nil {
+					return fmt.Errorf("failed to connect to relay %s: %w", relay, err)
+				}
+				defer r.Close()
+
+				sub, err := r.Subscribe(ctx, nostr.Filter{
+					Kinds:   []nostr.Kind{13194},
+					Authors: []nostr.PubKey{walletPubkey},
+				}, nostr.SubscriptionOptions{})
+				if err != nil {
+					return fmt.Errorf("failed to subscribe: %w", err)
+				}
+				defer sub.Close()
+
+				for {
+					select {
+					case ev := <-sub.Events:
+						stdout(ev)
+						return nil
+					case <-ctx.Done():
+						return fmt.Errorf("timed out waiting for info event")
+					}
+				}
+			},
+		},
+	},
+}
+
+func parseWalletConnectURL(walletURL string) (relay string, walletPubkey nostr.PubKey, secret string, err error) {
+	if !strings.HasPrefix(walletURL, "nostr+walletconnect://") {
+		return "", nostr.PubKey{}, "", fmt.Errorf("must start with nostr+walletconnect://")
+	}
+
+	parts := strings.SplitN(walletURL, "?", 2)
+	if len(parts) != 2 {
+		return "", nostr.PubKey{}, "", fmt.Errorf("query not found")
+	}
+
+	walletPubkey, err = nostr.PubKeyFromHex(strings.TrimPrefix(parts[0], "nostr+walletconnect://"))
+	if err != nil {
+		return "", nostr.PubKey{}, "", fmt.Errorf("invalid wallet pubkey: %w", err)
+	}
+
+	params, err := url.ParseQuery(parts[1])
+	if err != nil {
+		return "", nostr.PubKey{}, "", fmt.Errorf("invalid query: %w", err)
+	}
+
+	relay = params.Get("relay")
+	if relay == "" {
+		return "", nostr.PubKey{}, "", fmt.Errorf("relay missing")
+	}
+
+	secret = params.Get("secret")
+	if secret == "" {
+		return "", nostr.PubKey{}, "", fmt.Errorf("secret missing")
+	}
+
+	return relay, walletPubkey, secret, nil
+}