nsecbunker work-in-progress.

event.go

@@ -9,10 +9,8 @@ import (
 	"strings"
 	"time"
 
-	"github.com/bgentry/speakeasy"
 	"github.com/mailru/easyjson"
 	"github.com/nbd-wtf/go-nostr"
-	"github.com/nbd-wtf/go-nostr/nip19"
 	"github.com/nbd-wtf/go-nostr/nson"
 	"github.com/urfave/cli/v2"
 	"golang.org/x/exp/slices"
@@ -106,31 +104,10 @@ example:
 			}
 		}
 
-		// gather the secret key first
-		sec := c.String("sec")
-		if c.Bool("prompt-sec") {
-			if isPiped() {
-				return fmt.Errorf("can't prompt for a secret key when processing data from a pipe, try again without --prompt-sec")
-			}
-			var err error
-			sec, err = speakeasy.FAsk(os.Stderr, "type your secret key as nsec or hex: ")
+		// gather the secret key
+		sec, err := gatherSecretKeyFromArguments(c)
 		if err != nil {
-				return fmt.Errorf("failed to get secret key: %w", err)
-			}
-		}
-		if strings.HasPrefix(sec, "nsec1") {
-			_, hex, err := nip19.Decode(sec)
-			if err != nil {
-				return fmt.Errorf("invalid nsec: %w", err)
-			}
-			sec = hex.(string)
-		}
-		if len(sec) > 64 {
-			return fmt.Errorf("invalid secret key: too large")
-		}
-		sec = strings.Repeat("0", 64-len(sec)) + sec // left-pad
-		if err := validate32BytesHex(sec); err != nil {
-			return fmt.Errorf("invalid secret key")
+			return err
 		}
 
 		// then process input and generate events

go.mod

@@ -7,7 +7,7 @@ toolchain go1.21.0
 require (
 	github.com/bgentry/speakeasy v0.1.0
 	github.com/mailru/easyjson v0.7.7
-	github.com/nbd-wtf/go-nostr v0.26.1
+	github.com/nbd-wtf/go-nostr v0.26.2
 	github.com/nbd-wtf/nostr-sdk v0.0.2
 	github.com/urfave/cli/v2 v2.25.3
 	golang.org/x/exp v0.0.0-20230425010034-47ecfdc1ba53

go.sum

@@ -80,8 +80,8 @@ github.com/jrick/logrotate v1.0.0/go.mod h1:LNinyqDIJnpAur+b8yyulnQw/wDuN1+BYKlT
 github.com/kkdai/bstream v0.0.0-20161212061736-f391b8402d23/go.mod h1:J+Gs4SYgM6CZQHDETBtE9HaSEkGmuNXF86RwHhHUvq4=
 github.com/mailru/easyjson v0.7.7 h1:UGYAvKxe3sBsEDzO8ZeWOSlIQfWFlxbzLZe7hwFURr0=
 github.com/mailru/easyjson v0.7.7/go.mod h1:xzfreul335JAWq5oZzymOObrkdz5UnU4kGfJJLY9Nlc=
-github.com/nbd-wtf/go-nostr v0.26.1 h1:aqvXYdPycETozrRPp2roSNALNk2XMxRkBrHu3jXmhxA=
-github.com/nbd-wtf/go-nostr v0.26.1/go.mod h1:bkffJI+x914sPQWum9ZRUn66D7NpDnAoWo1yICvj3/0=
+github.com/nbd-wtf/go-nostr v0.26.2 h1:VI47qW7jqLrofB9DbDqH9lQH38eYgLYI7lBPYywIS78=
+github.com/nbd-wtf/go-nostr v0.26.2/go.mod h1:bkffJI+x914sPQWum9ZRUn66D7NpDnAoWo1yICvj3/0=
 github.com/nbd-wtf/nostr-sdk v0.0.2 h1:mZIeti+DOF0D1179q+NLL/h0LVMMOPRQAYpOuUrn5Zk=
 github.com/nbd-wtf/nostr-sdk v0.0.2/go.mod h1:KQZOtzcrXBlVhpZYG1tw83ADIONNMMPjUU3ZAH5U2RY=
 github.com/nxadm/tail v1.4.4/go.mod h1:kenIhsEOeOJmVchQTgglprH7qJGnHDVpk1VPCcaMI8A=

helpers.go

@@ -9,12 +9,17 @@ import (
 	"os"
 	"strings"
 
+	"github.com/bgentry/speakeasy"
 	"github.com/nbd-wtf/go-nostr"
+	"github.com/nbd-wtf/go-nostr/nip19"
 	"github.com/urfave/cli/v2"
 )
 
 const (
 	LINE_PROCESSING_ERROR = iota
+
+	BOLD_ON  = "\033[1m"
+	BOLD_OFF = "\033[21m"
 )
 
 var log = func(msg string, args ...any) {
@@ -129,3 +134,33 @@ func exitIfLineProcessingError(c *cli.Context) {
 		os.Exit(123)
 	}
 }
+
+func gatherSecretKeyFromArguments(c *cli.Context) (string, error) {
+	sec := c.String("sec")
+	if c.Bool("prompt-sec") {
+		if isPiped() {
+			return "", fmt.Errorf("can't prompt for a secret key when processing data from a pipe, try again without --prompt-sec")
+		}
+		var err error
+		sec, err = speakeasy.FAsk(os.Stderr, "type your secret key as nsec or hex: ")
+		if err != nil {
+			return "", fmt.Errorf("failed to get secret key: %w", err)
+		}
+	}
+	if strings.HasPrefix(sec, "nsec1") {
+		_, hex, err := nip19.Decode(sec)
+		if err != nil {
+			return "", fmt.Errorf("invalid nsec: %w", err)
+		}
+		sec = hex.(string)
+	}
+	if len(sec) > 64 {
+		return "", fmt.Errorf("invalid secret key: too large")
+	}
+	sec = strings.Repeat("0", 64-len(sec)) + sec // left-pad
+	if err := validate32BytesHex(sec); err != nil {
+		return "", fmt.Errorf("invalid secret key")
+	}
+
+	return sec, nil
+}

main.go

@@ -19,6 +19,7 @@ var app = &cli.App{
 		encode,
 		verify,
 		relay,
+		nsecbunker,
 	},
 	Flags: []cli.Flag{
 		&cli.BoolFlag{

nsecbunker.go

@@ -0,0 +1,124 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/url"
+	"os"
+
+	"github.com/bgentry/speakeasy"
+	"github.com/nbd-wtf/go-nostr"
+	"github.com/nbd-wtf/go-nostr/nip19"
+	"github.com/nbd-wtf/go-nostr/nip46"
+	"github.com/urfave/cli/v2"
+)
+
+var nsecbunker = &cli.Command{
+	Name:        "nsecbunker",
+	Usage:       "starts a NIP-46 signer daemon with the given --sec key",
+	ArgsUsage:   "[relay...]",
+	Description: ``,
+	Flags: []cli.Flag{
+		&cli.StringFlag{
+			Name:        "sec",
+			Usage:       "secret key to sign the event, as hex or nsec",
+			DefaultText: "the key '1'",
+			Value:       "0000000000000000000000000000000000000000000000000000000000000001",
+		},
+		&cli.BoolFlag{
+			Name:  "prompt-sec",
+			Usage: "prompt the user to paste a hex or nsec with which to sign the event",
+		},
+		&cli.BoolFlag{
+			Name:    "yes",
+			Aliases: []string{"y"},
+			Usage:   "always respond to any NIP-46 requests from anyone",
+		},
+	},
+	Action: func(c *cli.Context) error {
+		// try to connect to the relays here
+		qs := url.Values{}
+		relayURLs := make([]string, 0, c.Args().Len())
+		if relayUrls := c.Args().Slice(); len(relayUrls) > 0 {
+			_, relays := connectToAllRelays(c.Context, relayUrls)
+			if len(relays) == 0 {
+				log("failed to connect to any of the given relays.\n")
+				os.Exit(3)
+			}
+			for _, relay := range relays {
+				relayURLs = append(relayURLs, relay.URL)
+				qs.Add("relay", relay.URL)
+			}
+		}
+		if len(relayURLs) == 0 {
+			return fmt.Errorf("not connected to any relays: please specify at least one")
+		}
+
+		// gather the secret key
+		sec, err := gatherSecretKeyFromArguments(c)
+		if err != nil {
+			return err
+		}
+		pubkey, err := nostr.GetPublicKey(sec)
+		if err != nil {
+			return err
+		}
+		npub, _ := nip19.EncodePublicKey(pubkey)
+		code := fmt.Sprintf("%s#secret?%s", npub, qs.Encode())
+		log("listening at %s%v%s:\n  %spubkey:%s %s\n  %snpub:%s %s\n  %sconnection code:%s %s\n\n",
+			BOLD_ON, relayURLs, BOLD_OFF,
+			BOLD_ON, BOLD_OFF, pubkey,
+			BOLD_ON, BOLD_OFF, npub,
+			BOLD_ON, BOLD_OFF, code,
+		)
+
+		alwaysYes := c.Bool("yes")
+
+		// subscribe to relays
+		pool := nostr.NewSimplePool(c.Context)
+		events := pool.SubMany(c.Context, relayURLs, nostr.Filters{
+			{
+				Kinds: []int{24133},
+				Tags:  nostr.TagMap{"p": []string{pubkey}},
+			},
+		})
+
+		signer := nip46.NewSigner(sec)
+		for ie := range events {
+			req, resp, eventResponse, harmless, err := signer.HandleRequest(ie.Event)
+			if err != nil {
+				log("< failed to handle request from %s: %w", ie.Event.PubKey, err)
+				continue
+			}
+
+			jreq, _ := json.MarshalIndent(req, "  ", "  ")
+			log("- got request from '%s': %s\n", ie.Event.PubKey, string(jreq))
+			jresp, _ := json.MarshalIndent(resp, "  ", "  ")
+			log("~ responding with %s\n", string(jresp))
+
+			if alwaysYes || harmless || askUserIfWeCanRespond() {
+				_, err := ie.Relay.Publish(c.Context, eventResponse)
+				if err == nil {
+					log("* sent response!\n")
+				} else {
+					log("* failed to send response: %s\n", err)
+				}
+			}
+		}
+
+		return nil
+	},
+}
+
+func askUserIfWeCanRespond() bool {
+	answer, err := speakeasy.FAsk(os.Stderr,
+		fmt.Sprintf("proceed? y/n"))
+	if err != nil {
+		return false
+	}
+	if answer == "y" || answer == "yes" {
+		return true
+	}
+
+	return askUserIfWeCanRespond()
+}