nostrconnect:// beginnings.

bunker.go

@@ -110,6 +110,12 @@ var bunker = &cli.Command{
 			}
 		}
 
+		go func() {
+			for uri := range onSocketConnect(ctx, c) {
+				log("received nostrconnect URI: %s\n", uri)
+			}
+		}()
+
 		// default case: persist() is nil
 		var persist func()
 
@@ -410,19 +416,18 @@ var bunker = &cli.Command{
 			Name:      "connect",
 			Usage:     "use the client-initiated NostrConnect flow of NIP46",
 			ArgsUsage: "<nostrconnect-uri>",
+			Flags: []cli.Flag{
+				&cli.StringFlag{
+					Name:  "profile",
+					Usage: "profile name of the bunker to connect to",
+				},
+			},
 			Action: func(ctx context.Context, c *cli.Command) error {
 				if c.Args().Len() != 1 {
 					return fmt.Errorf("must be called with a nostrconnect://... uri")
 				}
 
-				uri, err := url.Parse(c.Args().First())
+				return sendToSocket(c, c.Args().First())
-				if err != nil || uri.Scheme != "nostrconnect" {
-					return fmt.Errorf("invalid uri")
-				}
-
-				// TODO
-
-				return fmt.Errorf("this is not implemented yet")
 			},
 		},
 	},

bunkerconn.go

@@ -0,0 +1,94 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"net/url"
+	"os"
+	"path/filepath"
+
+	"github.com/fatih/color"
+	"github.com/urfave/cli/v3"
+)
+
+func onSocketConnect(ctx context.Context, c *cli.Command) chan *url.URL {
+	res := make(chan *url.URL)
+
+	socketPath := getSocketPath(c)
+	if _, err := os.Stat(socketPath); err == nil {
+		// file exists, we must delete it (or not)
+		os.Remove(socketPath)
+	} else if !os.IsNotExist(err) {
+		log(color.RedString("failed to check on unix socket: %w\n", err))
+		return res
+	}
+
+	// start unix socket listener
+	os.MkdirAll(filepath.Dir(socketPath), 0755)
+
+	listener, err := net.Listen("unix", socketPath)
+	if err != nil {
+		log(color.RedString("failed to listen on unix socket: %w\n", err))
+		return res
+	}
+
+	// handle unix socket connections in background
+	go func() {
+		defer listener.Close()
+
+		// clean up socket file on exit
+		// (irrelevant, as we clean it on startup, but just to keep the user filesystem sane)
+		defer os.Remove(socketPath)
+
+		for {
+			conn, err := listener.Accept()
+			if err != nil {
+				continue
+			}
+
+			defer conn.Close()
+			buf := make([]byte, 4096)
+
+			for {
+				n, err := conn.Read(buf)
+				if err != nil {
+					break
+				}
+
+				uri, err := url.Parse(string(buf[:n]))
+				if err == nil && uri.Scheme == "nostrconnect" {
+					res <- uri
+				}
+			}
+		}
+	}()
+
+	return res
+}
+
+func sendToSocket(c *cli.Command, value string) error {
+	socketPath := getSocketPath(c)
+
+	// connect to unix socket
+	conn, err := net.Dial("unix", socketPath)
+	if err != nil {
+		return fmt.Errorf("failed to connect to bunker unix socket at %s: %w", socketPath, err)
+	}
+	defer conn.Close()
+
+	// send the uri
+	_, err = conn.Write([]byte(value))
+	if err != nil {
+		return fmt.Errorf("failed to send uri to bunker: %w", err)
+	}
+	return nil
+}
+
+func getSocketPath(c *cli.Command) string {
+	profile := "any"
+	if c.Bool("persist") || c.IsSet("profile") {
+		profile = c.String("profile")
+	}
+	return filepath.Join(c.String("config-path"), "bunkerconn", profile+".sock")
+}