nak decode

decode.go

@@ -0,0 +1,105 @@
+package main
+
+import (
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+
+	"github.com/nbd-wtf/go-nostr"
+	"github.com/nbd-wtf/go-nostr/nip19"
+	"github.com/nbd-wtf/go-nostr/sdk"
+	"github.com/urfave/cli/v2"
+)
+
+var decode = &cli.Command{
+	Name:  "decode",
+	Usage: "decodes nip19, nip21, nip05 or hex entities",
+	Description: `example usage:
+		nak decode
+		nak decode
+		nak decode
+		nak decode`,
+	Flags: []cli.Flag{
+		&cli.BoolFlag{
+			Name:    "id",
+			Aliases: []string{"e"},
+			Usage:   "return just the event id, if applicable",
+		},
+		&cli.BoolFlag{
+			Name:    "pubkey",
+			Aliases: []string{"p"},
+			Usage:   "return just the pubkey, if applicable",
+		},
+	},
+	ArgsUsage: "<npub | nprofile | nip05 | nevent | naddr | nsec>",
+	Action: func(c *cli.Context) error {
+		args := c.Args()
+		if args.Len() != 1 {
+			return fmt.Errorf("invalid number of arguments, need just one")
+		}
+		input := args.First()
+
+		var decodeResult DecodeResult
+		if b, err := hex.DecodeString(input); err == nil {
+			if len(b) == 64 {
+				decodeResult.HexResult.PossibleTypes = []string{"sig"}
+				decodeResult.HexResult.Signature = hex.EncodeToString(b)
+			} else if len(b) == 32 {
+				decodeResult.HexResult.PossibleTypes = []string{"pubkey", "private_key", "event_id"}
+				decodeResult.HexResult.ID = hex.EncodeToString(b)
+				decodeResult.HexResult.PrivateKey = hex.EncodeToString(b)
+				decodeResult.HexResult.PublicKey = hex.EncodeToString(b)
+			} else {
+				return fmt.Errorf("hex string with invalid number of bytes: %d", len(b))
+			}
+		} else if evp := sdk.InputToEventPointer(input); evp != nil {
+			decodeResult = DecodeResult{EventPointer: evp}
+		} else if pp := sdk.InputToProfile(input); pp != nil {
+			decodeResult = DecodeResult{ProfilePointer: pp}
+		} else if prefix, value, err := nip19.Decode(input); err == nil && prefix == "naddr" {
+			ep := value.(nostr.EntityPointer)
+			decodeResult = DecodeResult{EntityPointer: &ep}
+		} else if prefix, value, err := nip19.Decode(input); err == nil && prefix == "nsec" {
+			decodeResult.PrivateKey.PrivateKey = value.(string)
+			decodeResult.PrivateKey.PublicKey, _ = nostr.GetPublicKey(value.(string))
+		} else {
+			return fmt.Errorf("couldn't decode input")
+		}
+
+		fmt.Println(decodeResult.JSON())
+		return nil
+	},
+}
+
+type DecodeResult struct {
+	*nostr.EventPointer
+	*nostr.ProfilePointer
+	*nostr.EntityPointer
+	HexResult struct {
+		PossibleTypes []string `json:"possible_types"`
+		PublicKey     string   `json:"pubkey,omitempty"`
+		ID            string   `json:"event_id,omitempty"`
+		PrivateKey    string   `json:"private_key,omitempty"`
+		Signature     string   `json:"sig,omitempty"`
+	}
+	PrivateKey struct {
+		nostr.ProfilePointer
+		PrivateKey string `json:"private_key"`
+	}
+}
+
+func (d DecodeResult) JSON() string {
+	var j []byte
+	if d.EventPointer != nil {
+		j, _ = json.MarshalIndent(d.EventPointer, "", "  ")
+	} else if d.ProfilePointer != nil {
+		j, _ = json.MarshalIndent(d.ProfilePointer, "", "  ")
+	} else if d.EntityPointer != nil {
+		j, _ = json.MarshalIndent(d.EntityPointer, "", "  ")
+	} else if len(d.HexResult.PossibleTypes) > 0 {
+		j, _ = json.MarshalIndent(d.HexResult, "", "  ")
+	} else if d.PrivateKey.PrivateKey != "" {
+		j, _ = json.MarshalIndent(d.PrivateKey, "", "  ")
+	}
+	return string(j)
+}

go.mod

@@ -3,13 +3,14 @@ module git.fiatjaf.com/nak
 go 1.20
 
 require (
-	github.com/nbd-wtf/go-nostr v0.17.1
+	github.com/nbd-wtf/go-nostr v0.17.3
 	github.com/urfave/cli/v2 v2.25.3
 )
 
 require (
 	github.com/SaveTheRbtz/generic-sync-map-go v0.0.0-20220414055132-a37292614db8 // indirect
 	github.com/btcsuite/btcd/btcec/v2 v2.2.0 // indirect
+	github.com/btcsuite/btcd/btcutil v1.1.3 // indirect
 	github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
 	github.com/decred/dcrd/crypto/blake256 v1.0.0 // indirect

go.sum

@@ -1,30 +1,122 @@
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 github.com/SaveTheRbtz/generic-sync-map-go v0.0.0-20220414055132-a37292614db8/go.mod h1:ihkm1viTbO/LOsgdGoFPBSvzqvx7ibvkMzYp3CgtHik=
+github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII=
+github.com/btcsuite/btcd v0.20.1-beta/go.mod h1:wVuoA8VJLEcwgqHBwHmzLRazpKxTv13Px/pDuV7OomQ=
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+github.com/btcsuite/btcd v0.23.0/go.mod h1:0QJIIN1wwIXF/3G/m87gIwGniDMDQqjVn4SZgnFpsYY=
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+google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
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+google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
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+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

main.go

@@ -14,6 +14,7 @@ func main() {
 		Commands: []*cli.Command{
 			req,
 			event,
+			decode,
 		},
 	}