close channel in getStdinLinesOrFirstArgument()

LICENSE

@@ -0,0 +1,24 @@
+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to <https://unlicense.org>

README.md

@@ -76,3 +76,8 @@ publishing to wss://relayable.org... success.
 ~> echo '{"content":"hello world","created_at":1698923350,"id":"05bd99d54cb835f327e0092c4275ee44c7ff51219eff417c19f70c9e2c53ad5a","kind":1,"pubkey":"79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798","sig":"0a04a296321ed933858577f36fb2fb9a0933e966f9ee32b539493f5a4d00120891b1ca9152ebfbc04fb403bdaa7c73f415e7c4954e55726b4b4fa8cebf008cd6","tags":[]}' | nak verify
 invalid .id, expected 05bd99d54cb835f427e0092c4275ee44c7ff51219eff417c19f70c9e2c53ad5a, got 05bd99d54cb835f327e0092c4275ee44c7ff51219eff417c19f70c9e2c53ad5a
 ```
+
+### fetch all quoted events by a given pubkey in their last 100 notes
+```shell
+nak req -l 100 -k 1 -a 2edbcea694d164629854a52583458fd6d965b161e3c48b57d3aff01940558884 wss://relay.damus.io | jq -r '.content | match("nostr:((note1|nevent1)[a-z0-9]+)";"g") | .captures[0].string' | nak decode | jq -cr '{ids: [.id]}' | nak req wss://relay.damus.io
+```

decode.go

@@ -8,7 +8,7 @@ import (
 
 	"github.com/nbd-wtf/go-nostr"
 	"github.com/nbd-wtf/go-nostr/nip19"
-	"github.com/nbd-wtf/go-nostr/sdk"
+	sdk "github.com/nbd-wtf/nostr-sdk"
 	"github.com/urfave/cli/v2"
 )
 
@@ -34,11 +34,7 @@ var decode = &cli.Command{
 	},
 	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()
+		for input := range getStdinLinesOrFirstArgument(c) {
 			if strings.HasPrefix(input, "nostr:") {
 				input = input[6:]
 			}
@@ -54,7 +50,8 @@ var decode = &cli.Command{
 					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))
+					lineProcessingError(c, "hex string with invalid number of bytes: %d", len(b))
+					continue
 				}
 			} else if evp := sdk.InputToEventPointer(input); evp != nil {
 				decodeResult = DecodeResult{EventPointer: evp}
@@ -67,10 +64,15 @@ var decode = &cli.Command{
 				decodeResult.PrivateKey.PrivateKey = value.(string)
 				decodeResult.PrivateKey.PublicKey, _ = nostr.GetPublicKey(value.(string))
 			} else {
-			return fmt.Errorf("couldn't decode input")
+				lineProcessingError(c, "couldn't decode input '%s': %s", input, err)
+				continue
 			}
 
 			fmt.Println(decodeResult.JSON())
+
+		}
+
+		exitIfLineProcessingError(c)
 		return nil
 	},
 }

encode.go

@@ -1,9 +1,7 @@
 package main
 
 import (
-	"encoding/hex"
 	"fmt"
-	"strings"
 
 	"github.com/nbd-wtf/go-nostr/nip19"
 	"github.com/urfave/cli/v2"
@@ -28,36 +26,44 @@ var encode = &cli.Command{
 	Subcommands: []*cli.Command{
 		{
 			Name:  "npub",
-			Usage: "encode a hex private key into bech32 'npub' format",
+			Usage: "encode a hex public key into bech32 'npub' format",
 			Action: func(c *cli.Context) error {
-				target := getStdinOrFirstArgument(c)
+				for target := range getStdinLinesOrFirstArgument(c) {
 					if err := validate32BytesHex(target); err != nil {
-					return err
+						lineProcessingError(c, "invalid public key: %s", target, err)
+						continue
 					}
 
 					if npub, err := nip19.EncodePublicKey(target); err == nil {
 						fmt.Println(npub)
-					return nil
 					} else {
 						return err
 					}
+				}
+
+				exitIfLineProcessingError(c)
+				return nil
 			},
 		},
 		{
 			Name:  "nsec",
 			Usage: "encode a hex private key into bech32 'nsec' format",
 			Action: func(c *cli.Context) error {
-				target := getStdinOrFirstArgument(c)
+				for target := range getStdinLinesOrFirstArgument(c) {
 					if err := validate32BytesHex(target); err != nil {
-					return err
+						lineProcessingError(c, "invalid private key: %s", target, err)
+						continue
 					}
 
 					if npub, err := nip19.EncodePrivateKey(target); err == nil {
 						fmt.Println(npub)
-					return nil
 					} else {
 						return err
 					}
+				}
+
+				exitIfLineProcessingError(c)
+				return nil
 			},
 		},
 		{
@@ -71,9 +77,10 @@ var encode = &cli.Command{
 				},
 			},
 			Action: func(c *cli.Context) error {
-				target := getStdinOrFirstArgument(c)
+				for target := range getStdinLinesOrFirstArgument(c) {
 					if err := validate32BytesHex(target); err != nil {
-					return err
+						lineProcessingError(c, "invalid public key: %s", target, err)
+						continue
 					}
 
 					relays := c.StringSlice("relay")
@@ -83,10 +90,13 @@ var encode = &cli.Command{
 
 					if npub, err := nip19.EncodeProfile(target, relays); err == nil {
 						fmt.Println(npub)
-					return nil
 					} else {
 						return err
 					}
+				}
+
+				exitIfLineProcessingError(c)
+				return nil
 			},
 		},
 		{
@@ -104,9 +114,10 @@ var encode = &cli.Command{
 				},
 			},
 			Action: func(c *cli.Context) error {
-				target := getStdinOrFirstArgument(c)
+				for target := range getStdinLinesOrFirstArgument(c) {
 					if err := validate32BytesHex(target); err != nil {
-					return err
+						lineProcessingError(c, "invalid event id: %s", target, err)
+						continue
 					}
 
 					author := c.String("author")
@@ -123,10 +134,13 @@ var encode = &cli.Command{
 
 					if npub, err := nip19.EncodeEvent(target, relays, author); err == nil {
 						fmt.Println(npub)
-					return nil
 					} else {
 						return err
 					}
+				}
+
+				exitIfLineProcessingError(c)
+				return nil
 			},
 		},
 		{
@@ -136,7 +150,7 @@ var encode = &cli.Command{
 				&cli.StringFlag{
 					Name:     "identifier",
 					Aliases:  []string{"d"},
-					Usage:    "the \"d\" tag identifier of this replaceable event",
+					Usage:    "the \"d\" tag identifier of this replaceable event -- can also be read from stdin",
 					Required: true,
 				},
 				&cli.StringFlag{
@@ -158,6 +172,7 @@ var encode = &cli.Command{
 				},
 			},
 			Action: func(c *cli.Context) error {
+				for d := range getStdinLinesOrBlank() {
 					pubkey := c.String("pubkey")
 					if err := validate32BytesHex(pubkey); err != nil {
 						return err
@@ -168,9 +183,12 @@ var encode = &cli.Command{
 						return fmt.Errorf("kind must be between 30000 and 39999, as per NIP-16, got %d", kind)
 					}
 
-				d := c.String("identifier")
 					if d == "" {
-					return fmt.Errorf("\"d\" tag identifier can't be empty")
+						d = c.String("identifier")
+						if d == "" {
+							lineProcessingError(c, "\"d\" tag identifier can't be empty")
+							continue
+						}
 					}
 
 					relays := c.StringSlice("relay")
@@ -180,42 +198,35 @@ var encode = &cli.Command{
 
 					if npub, err := nip19.EncodeEntity(pubkey, kind, d, relays); err == nil {
 						fmt.Println(npub)
-					return nil
 					} else {
 						return err
 					}
+				}
+
+				exitIfLineProcessingError(c)
+				return nil
 			},
 		},
 		{
 			Name:  "note",
 			Usage: "generate note1 event codes (not recommended)",
 			Action: func(c *cli.Context) error {
-				target := getStdinOrFirstArgument(c)
+				for target := range getStdinLinesOrFirstArgument(c) {
 					if err := validate32BytesHex(target); err != nil {
-					return err
+						lineProcessingError(c, "invalid event id: %s", target, err)
+						continue
 					}
 
-				if npub, err := nip19.EncodeNote(target); err == nil {
-					fmt.Println(npub)
-					return nil
+					if note, err := nip19.EncodeNote(target); err == nil {
+						fmt.Println(note)
 					} else {
 						return err
 					}
-			},
-		},
-	},
-}
-
-func validate32BytesHex(target string) error {
-	if _, err := hex.DecodeString(target); err != nil {
-		return fmt.Errorf("target '%s' is not valid hex: %s", target, err)
-	}
-	if len(target) != 64 {
-		return fmt.Errorf("expected '%s' to be 64 characters (32 bytes), got %d", target, len(target))
-	}
-	if strings.ToLower(target) != target {
-		return fmt.Errorf("expected target to be all lowercase hex. try again with '%s'", strings.ToLower(target))
 				}
 
+				exitIfLineProcessingError(c)
 				return nil
+			},
+		},
+	},
 }

event.go

@@ -9,8 +9,10 @@ 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"
 )
@@ -35,10 +37,14 @@ example:
 	Flags: []cli.Flag{
 		&cli.StringFlag{
 			Name:        "sec",
-			Usage:       "secret key to sign the event",
+			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:  "envelope",
 			Usage: "print the event enveloped in a [\"EVENT\", ...] message ready to be sent to a relay",
@@ -90,15 +96,44 @@ example:
 	},
 	ArgsUsage: "[relay...]",
 	Action: func(c *cli.Context) error {
+		// 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: ")
+			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")
+		}
+
+		// then process input and generate events
+		for stdinEvent := range getStdinLinesOrBlank() {
 			evt := nostr.Event{
 				Tags: make(nostr.Tags, 0, 3),
 			}
 
 			mustRehashAndResign := false
-
-		if stdinEvent := getStdin(); stdinEvent != "" {
+			if stdinEvent != "" {
 				if err := json.Unmarshal([]byte(stdinEvent), &evt); err != nil {
-				return fmt.Errorf("invalid event received from stdin: %w", err)
+					lineProcessingError(c, "invalid event received from stdin: %s", err)
+					continue
 				}
 			}
 
@@ -163,7 +198,7 @@ example:
 			}
 
 			if evt.Sig == "" || mustRehashAndResign {
-			if err := evt.Sign(c.String("sec")); err != nil {
+				if err := evt.Sign(sec); err != nil {
 					return fmt.Errorf("error signing with provided key: %w", err)
 				}
 			}
@@ -198,7 +233,9 @@ example:
 				}
 				fmt.Println(result)
 			}
+		}
 
+		exitIfLineProcessingError(c)
 		return nil
 	},
 }

example_test.go

@@ -0,0 +1,31 @@
+package main
+
+func ExampleEventBasic() {
+	app.Run([]string{"nak", "event", "--ts", "1699485669"})
+	// Output:
+	// {"id":"36d88cf5fcc449f2390a424907023eda7a74278120eebab8d02797cd92e7e29c","pubkey":"79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798","created_at":1699485669,"kind":1,"tags":[],"content":"hello from the nostr army knife","sig":"68e71a192e8abcf8582a222434ac823ecc50607450ebe8cc4c145eb047794cc382dc3f888ce879d2f404f5ba6085a47601360a0fa2dd4b50d317bd0c6197c2c2"}
+}
+
+func ExampleEventComplex() {
+	app.Run([]string{"nak", "event", "--ts", "1699485669", "-k", "11", "-c", "skjdbaskd", "--sec", "17", "-t", "t=spam", "-e", "36d88cf5fcc449f2390a424907023eda7a74278120eebab8d02797cd92e7e29c", "-t", "r=https://abc.def;nothing"})
+	// Output:
+	// {"id":"aec4de6d051a7c2b6ca2d087903d42051a31e07fb742f1240970084822de10a6","pubkey":"2fa2104d6b38d11b0230010559879124e42ab8dfeff5ff29dc9cdadd4ecacc3f","created_at":1699485669,"kind":11,"tags":[["t","spam"],["r","https://abc.def","nothing"],["e","36d88cf5fcc449f2390a424907023eda7a74278120eebab8d02797cd92e7e29c"]],"content":"skjdbaskd","sig":"1165ac7a27d774d351ef19c8e918fb22f4005fcba193976c3d7edba6ef87ead7f14467f376a9e199f8371835368d86a8506f591e382528d00287fb168a7b8f38"}
+}
+
+func ExampleReq() {
+	app.Run([]string{"nak", "req", "-k", "1", "-l", "18", "-a", "2fa2104d6b38d11b0230010559879124e42ab8dfeff5ff29dc9cdadd4ecacc3f", "-e", "aec4de6d051a7c2b6ca2d087903d42051a31e07fb742f1240970084822de10a6"})
+	// Output:
+	// ["REQ","nak",{"kinds":[1],"authors":["2fa2104d6b38d11b0230010559879124e42ab8dfeff5ff29dc9cdadd4ecacc3f"],"limit":18,"#e":["aec4de6d051a7c2b6ca2d087903d42051a31e07fb742f1240970084822de10a6"]}]
+}
+
+func ExampleEncodeNpub() {
+	app.Run([]string{"nak", "encode", "npub", "a6a67ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f8179822"})
+	// Output:
+	// npub156n8a7wuhwk9tgrzjh8gwzc8q2dlekedec5djk0js9d3d7qhnq3qjpdq28
+}
+
+func ExampleEncodeNprofile() {
+	app.Run([]string{"nak", "encode", "nprofile", "-r", "wss://example.com", "a6a67ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f8179822"})
+	// Output:
+	// nprofile1qqs2dfn7l8wthtz45p3ftn58pvrs9xlumvkuu2xet8egzkcklqtesgspz9mhxue69uhk27rpd4cxcefwvdhk6fl5jug
+}

fetch.go

@@ -5,7 +5,7 @@ import (
 
 	"github.com/nbd-wtf/go-nostr"
 	"github.com/nbd-wtf/go-nostr/nip19"
-	"github.com/nbd-wtf/go-nostr/sdk"
+	sdk "github.com/nbd-wtf/nostr-sdk"
 	"github.com/urfave/cli/v2"
 )
 
@@ -24,12 +24,13 @@ var fetch = &cli.Command{
 	},
 	ArgsUsage: "[nip19code]",
 	Action: func(c *cli.Context) error {
+		for code := range getStdinLinesOrFirstArgument(c) {
 			filter := nostr.Filter{}
-		code := getStdinOrFirstArgument(c)
 
 			prefix, value, err := nip19.Decode(code)
 			if err != nil {
-			return err
+				lineProcessingError(c, "failed to decode: %s", err)
+				continue
 			}
 
 			relays := c.StringSlice("relay")
@@ -78,13 +79,16 @@ var fetch = &cli.Command{
 			}
 
 			if len(relays) == 0 {
-			return fmt.Errorf("no relay hints found")
+				lineProcessingError(c, "no relay hints found")
+				continue
 			}
 
 			for ie := range pool.SubManyEose(c.Context, relays, nostr.Filters{filter}) {
 				fmt.Println(ie.Event)
 			}
+		}
 
+		exitIfLineProcessingError(c)
 		return nil
 	},
 }

go.mod

@@ -1,35 +1,40 @@
 module github.com/fiatjaf/nak
 
-go 1.20
+go 1.21
+
+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 v0.24.2
+	github.com/nbd-wtf/go-nostr v0.25.3
+	github.com/nbd-wtf/nostr-sdk v0.0.2
 	github.com/urfave/cli/v2 v2.25.3
 )
 
 require (
-	github.com/btcsuite/btcd/btcec/v2 v2.2.0 // indirect
+	github.com/btcsuite/btcd/btcec/v2 v2.3.2 // indirect
 	github.com/btcsuite/btcd/btcutil v1.1.3 // indirect
-	github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1 // indirect
-	github.com/cespare/xxhash/v2 v2.1.1 // indirect
+	github.com/btcsuite/btcd/chaincfg/chainhash v1.0.2 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
-	github.com/decred/dcrd/crypto/blake256 v1.0.0 // indirect
-	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1 // indirect
+	github.com/decred/dcrd/crypto/blake256 v1.0.1 // indirect
+	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.2.0 // indirect
 	github.com/dgraph-io/ristretto v0.1.1 // indirect
 	github.com/dustin/go-humanize v1.0.0 // indirect
+	github.com/fiatjaf/eventstore v0.1.0 // indirect
 	github.com/gobwas/httphead v0.1.0 // indirect
 	github.com/gobwas/pool v0.2.1 // indirect
 	github.com/gobwas/ws v1.2.0 // indirect
-	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b // indirect
+	github.com/golang/glog v1.0.0 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
-	github.com/puzpuzpuz/xsync/v2 v2.5.0 // indirect
+	github.com/puzpuzpuz/xsync/v2 v2.5.1 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/tidwall/gjson v1.14.4 // indirect
 	github.com/tidwall/match v1.1.1 // indirect
 	github.com/tidwall/pretty v1.2.0 // indirect
 	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
-	golang.org/x/exp v0.0.0-20221106115401-f9659909a136 // indirect
-	golang.org/x/sys v0.6.0 // indirect
+	golang.org/x/exp v0.0.0-20230425010034-47ecfdc1ba53 // indirect
+	golang.org/x/sys v0.8.0 // indirect
 )

go.sum

@@ -1,18 +1,21 @@
 github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII=
+github.com/bgentry/speakeasy v0.1.0 h1:ByYyxL9InA1OWqxJqqp2A5pYHUrCiAL6K3J+LKSsQkY=
+github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
 github.com/btcsuite/btcd v0.20.1-beta/go.mod h1:wVuoA8VJLEcwgqHBwHmzLRazpKxTv13Px/pDuV7OomQ=
 github.com/btcsuite/btcd v0.22.0-beta.0.20220111032746-97732e52810c/go.mod h1:tjmYdS6MLJ5/s0Fj4DbLgSbDHbEqLJrtnHecBFkdz5M=
 github.com/btcsuite/btcd v0.23.0/go.mod h1:0QJIIN1wwIXF/3G/m87gIwGniDMDQqjVn4SZgnFpsYY=
 github.com/btcsuite/btcd/btcec/v2 v2.1.0/go.mod h1:2VzYrv4Gm4apmbVVsSq5bqf1Ec8v56E48Vt0Y/umPgA=
 github.com/btcsuite/btcd/btcec/v2 v2.1.3/go.mod h1:ctjw4H1kknNJmRN4iP1R7bTQ+v3GJkZBd6mui8ZsAZE=
-github.com/btcsuite/btcd/btcec/v2 v2.2.0 h1:fzn1qaOt32TuLjFlkzYSsBC35Q3KUjT1SwPxiMSCF5k=
-github.com/btcsuite/btcd/btcec/v2 v2.2.0/go.mod h1:U7MHm051Al6XmscBQ0BoNydpOTsFAn707034b5nY8zU=
+github.com/btcsuite/btcd/btcec/v2 v2.3.2 h1:5n0X6hX0Zk+6omWcihdYvdAlGf2DfasC0GMf7DClJ3U=
+github.com/btcsuite/btcd/btcec/v2 v2.3.2/go.mod h1:zYzJ8etWJQIv1Ogk7OzpWjowwOdXY1W/17j2MW85J04=
 github.com/btcsuite/btcd/btcutil v1.0.0/go.mod h1:Uoxwv0pqYWhD//tfTiipkxNfdhG9UrLwaeswfjfdF0A=
 github.com/btcsuite/btcd/btcutil v1.1.0/go.mod h1:5OapHB7A2hBBWLm48mmw4MOHNJCcUBTwmWH/0Jn8VHE=
 github.com/btcsuite/btcd/btcutil v1.1.3 h1:xfbtw8lwpp0G6NwSHb+UE67ryTFHJAiNuipusjXSohQ=
 github.com/btcsuite/btcd/btcutil v1.1.3/go.mod h1:UR7dsSJzJUfMmFiiLlIrMq1lS9jh9EdCV7FStZSnpi0=
 github.com/btcsuite/btcd/chaincfg/chainhash v1.0.0/go.mod h1:7SFka0XMvUgj3hfZtydOrQY2mwhPclbT2snogU7SQQc=
-github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1 h1:q0rUy8C/TYNBQS1+CGKw68tLOFYSNEs0TFnxxnS9+4U=
 github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1/go.mod h1:7SFka0XMvUgj3hfZtydOrQY2mwhPclbT2snogU7SQQc=
+github.com/btcsuite/btcd/chaincfg/chainhash v1.0.2 h1:KdUfX2zKommPRa+PD0sWZUyXe9w277ABlgELO7H04IM=
+github.com/btcsuite/btcd/chaincfg/chainhash v1.0.2/go.mod h1:7SFka0XMvUgj3hfZtydOrQY2mwhPclbT2snogU7SQQc=
 github.com/btcsuite/btclog v0.0.0-20170628155309-84c8d2346e9f/go.mod h1:TdznJufoqS23FtqVCzL0ZqgP5MqXbb4fg/WgDys70nA=
 github.com/btcsuite/btcutil v0.0.0-20190425235716-9e5f4b9a998d/go.mod h1:+5NJ2+qvTyV9exUAL/rxXi3DcLg2Ts+ymUAY5y4NvMg=
 github.com/btcsuite/go-socks v0.0.0-20170105172521-4720035b7bfd/go.mod h1:HHNXQzUsZCxOoE+CPiyCTO6x34Zs86zZUiwtpXoGdtg=
@@ -22,18 +25,21 @@ github.com/btcsuite/snappy-go v0.0.0-20151229074030-0bdef8d06723/go.mod h1:8woku
 github.com/btcsuite/snappy-go v1.0.0/go.mod h1:8woku9dyThutzjeg+3xrA5iCpBRH8XEEg3lh6TiUghc=
 github.com/btcsuite/websocket v0.0.0-20150119174127-31079b680792/go.mod h1:ghJtEyQwv5/p4Mg4C0fgbePVuGr935/5ddU9Z3TmDRY=
 github.com/btcsuite/winsvc v1.0.0/go.mod h1:jsenWakMcC0zFBFurPLEAyrnc/teJEM1O46fmI40EZs=
-github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
+github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/cpuguy83/go-md2man/v2 v2.0.2 h1:p1EgwI/C7NhT0JmVkwCD2ZBK8j4aeHQX2pMHHBfMQ6w=
 github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/davecgh/go-spew v0.0.0-20171005155431-ecdeabc65495/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/decred/dcrd/crypto/blake256 v1.0.0 h1:/8DMNYp9SGi5f0w7uCm6d6M4OU2rGFK09Y2A4Xv7EE0=
 github.com/decred/dcrd/crypto/blake256 v1.0.0/go.mod h1:sQl2p6Y26YV+ZOcSTP6thNdn47hh8kt6rqSlvmrXFAc=
-github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1 h1:YLtO71vCjJRCBcrPMtQ9nqBsqpA1m5sE92cU+pd5Mcc=
+github.com/decred/dcrd/crypto/blake256 v1.0.1 h1:7PltbUIQB7u/FfZ39+DGa/ShuMyJ5ilcvdfma9wOH6Y=
+github.com/decred/dcrd/crypto/blake256 v1.0.1/go.mod h1:2OfgNZ5wDpcsFmHmCK5gZTPcCXqlm2ArzUIkw9czNJo=
 github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1/go.mod h1:hyedUtir6IdtD/7lIxGeCxkaw7y45JueMRL4DIyJDKs=
+github.com/decred/dcrd/dcrec/secp256k1/v4 v4.2.0 h1:8UrgZ3GkP4i/CLijOJx79Yu+etlyjdBU4sfcs2WYQMs=
+github.com/decred/dcrd/dcrec/secp256k1/v4 v4.2.0/go.mod h1:v57UDF4pDQJcEfFUCRop3lJL149eHGSe9Jvczhzjo/0=
 github.com/decred/dcrd/lru v1.0.0/go.mod h1:mxKOwFd7lFjN2GZYsiz/ecgqR6kkYAl+0pz0tEMk218=
 github.com/dgraph-io/ristretto v0.1.1 h1:6CWw5tJNgpegArSHpNHJKldNeq03FQCwYvfMVWajOK8=
 github.com/dgraph-io/ristretto v0.1.1/go.mod h1:S1GPSBCYCIhmVNfcth17y2zZtQT6wzkzgwUve0VDWWA=
@@ -41,6 +47,8 @@ github.com/dgryski/go-farm v0.0.0-20190423205320-6a90982ecee2 h1:tdlZCpZ/P9DhczC
 github.com/dgryski/go-farm v0.0.0-20190423205320-6a90982ecee2/go.mod h1:SqUrOPUnsFjfmXRMNPybcSiG0BgUW2AuFH8PAnS2iTw=
 github.com/dustin/go-humanize v1.0.0 h1:VSnTsYCnlFHaM2/igO1h6X3HA71jcobQuxemgkq4zYo=
 github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
+github.com/fiatjaf/eventstore v0.1.0 h1:/g7VTw6dsXmjICD3rBuHNIvAammHJ5unrKJ71Dz+VTs=
+github.com/fiatjaf/eventstore v0.1.0/go.mod h1:juMei5HL3HJi6t7vZjj7VdEItDPu31+GLROepdUK4tw=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
 github.com/gobwas/httphead v0.1.0 h1:exrUm0f4YX0L7EBwZHuCF4GDp8aJfVeBrlLQrs6NqWU=
@@ -49,8 +57,9 @@ github.com/gobwas/pool v0.2.1 h1:xfeeEhW7pwmX8nuLVlqbzVc7udMDrwetjEv+TZIz1og=
 github.com/gobwas/pool v0.2.1/go.mod h1:q8bcK0KcYlCgd9e7WYLm9LpyS+YeLd8JVDW6WezmKEw=
 github.com/gobwas/ws v1.2.0 h1:u0p9s3xLYpZCA1z5JgCkMeB34CKCMMQbM+G8Ii7YD0I=
 github.com/gobwas/ws v1.2.0/go.mod h1:hRKAFb8wOxFROYNsT1bqfWnhX+b5MFeJM9r2ZSwg/KY=
-github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
+github.com/golang/glog v1.0.0 h1:nfP3RFugxnNRyKgeWd4oI1nYvXpxrx8ck8ZrcizshdQ=
+github.com/golang/glog v1.0.0/go.mod h1:EWib/APOK0SL3dFbYqvxE3UYd8E6s1ouQ7iEp/0LWV4=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
 github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
@@ -71,8 +80,10 @@ 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 v0.24.2 h1:1PdFED7uHh3BlXfDVD96npBc0YAgj9hPT+l6NWog4kc=
-github.com/nbd-wtf/go-nostr v0.24.2/go.mod h1:eE8Qf8QszZbCd9arBQyotXqATNUElWsTEEx+LLORhyQ=
+github.com/nbd-wtf/go-nostr v0.25.3 h1:RPPh4cOosw0OZi5KG627pZ3GlKxiKsjARluzen/mB9g=
+github.com/nbd-wtf/go-nostr v0.25.3/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=
 github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
 github.com/onsi/ginkgo v1.7.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
@@ -86,14 +97,15 @@ github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/puzpuzpuz/xsync/v2 v2.5.0 h1:2k4qrO/orvmEXZ3hmtHqIy9XaQtPTwzMZk1+iErpE8c=
-github.com/puzpuzpuz/xsync/v2 v2.5.0/go.mod h1:gD2H2krq/w52MfPLE+Uy64TzJDVY7lP2znR9qmR35kU=
+github.com/puzpuzpuz/xsync/v2 v2.5.1 h1:mVGYAvzDSu52+zaGyNjC+24Xw2bQi3kTr4QJ6N9pIIU=
+github.com/puzpuzpuz/xsync/v2 v2.5.1/go.mod h1:gD2H2krq/w52MfPLE+Uy64TzJDVY7lP2znR9qmR35kU=
 github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
-github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 github.com/syndtr/goleveldb v1.0.1-0.20210819022825-2ae1ddf74ef7/go.mod h1:q4W45IWZaF22tdD+VEXcAWRA037jwmWEB5VWYORlTpc=
 github.com/tidwall/gjson v1.14.4 h1:uo0p8EbA09J7RQaflQ1aBRffTR7xedD2bcIVSYxLnkM=
 github.com/tidwall/gjson v1.14.4/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
@@ -108,14 +120,15 @@ github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673/go.mod h1:N3UwUGtsr
 golang.org/x/crypto v0.0.0-20170930174604-9419663f5a44/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/exp v0.0.0-20221106115401-f9659909a136 h1:Fq7F/w7MAa1KJ5bt2aJ62ihqp9HDcRuyILskkpIAurw=
-golang.org/x/exp v0.0.0-20221106115401-f9659909a136/go.mod h1:CxIveKay+FTh1D0yPZemJVgC/95VzuuOLq5Qi4xnoYc=
+golang.org/x/exp v0.0.0-20230425010034-47ecfdc1ba53 h1:5llv2sWeaMSnA3w2kS57ouQQ4pudlXrR0dCgw51QK9o=
+golang.org/x/exp v0.0.0-20230425010034-47ecfdc1ba53/go.mod h1:V1LtkGg67GoY2N1AnLN78QLrzxkLyJw7RJb1gzOOz9w=
 golang.org/x/net v0.0.0-20180719180050-a680a1efc54d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20200520004742-59133d7f0dd7/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
-golang.org/x/net v0.0.0-20200813134508-3edf25e44fcc h1:zK/HqS5bZxDptfPJNq8v7vJfXtkU7r9TLIoSr1bXaP4=
 golang.org/x/net v0.0.0-20200813134508-3edf25e44fcc/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
+golang.org/x/net v0.8.0 h1:Zrh2ngAOFYneWTAIAPethzeaQLuHwhuBkuV6ZiRnUaQ=
+golang.org/x/net v0.8.0/go.mod h1:QVkue5JL9kW//ek3r6jTKnTFis1tRmNAW2P1shuFdJc=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -127,8 +140,9 @@ golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200519105757-fe76b779f299/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200814200057-3d37ad5750ed/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20221010170243-090e33056c14/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.6.0 h1:MVltZSvRTcU2ljQOhs94SXPftV6DCNnZViHeQps87pQ=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.8.0 h1:EBmGv8NaZBZTWvrbjNoL6HVt+IVy3QDQpJs7VRIw3tU=
+golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
@@ -150,3 +164,4 @@ 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=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

helpers.go

@@ -1,9 +1,10 @@
 package main
 
 import (
-	"bytes"
+	"bufio"
+	"context"
+	"encoding/hex"
 	"fmt"
-	"io"
 	"net/url"
 	"os"
 	"strings"
@@ -11,24 +12,58 @@ import (
 	"github.com/urfave/cli/v2"
 )
 
-func getStdin() string {
+const (
+	LINE_PROCESSING_ERROR = iota
+)
+
+func isPiped() bool {
 	stat, _ := os.Stdin.Stat()
-	if (stat.Mode() & os.ModeCharDevice) == 0 {
-		read := bytes.NewBuffer(make([]byte, 0, 1000))
-		_, err := io.Copy(read, os.Stdin)
-		if err == nil {
-			return strings.TrimSpace(read.String())
-		}
-	}
-	return ""
+	return stat.Mode()&os.ModeCharDevice == 0
 }
 
-func getStdinOrFirstArgument(c *cli.Context) string {
+func getStdinLinesOrBlank() chan string {
+	multi := make(chan string)
+	if hasStdinLines := writeStdinLinesOrNothing(multi); !hasStdinLines {
+		single := make(chan string, 1)
+		single <- ""
+		close(single)
+		return single
+	} else {
+		return multi
+	}
+}
+
+func getStdinLinesOrFirstArgument(c *cli.Context) chan string {
+	// try the first argument
 	target := c.Args().First()
 	if target != "" {
-		return target
+		single := make(chan string, 1)
+		single <- target
+		close(single)
+		return single
+	}
+
+	// try the stdin
+	multi := make(chan string)
+	writeStdinLinesOrNothing(multi)
+	return multi
+}
+
+func writeStdinLinesOrNothing(ch chan string) (hasStdinLines bool) {
+	if isPiped() {
+		// piped
+		go func() {
+			scanner := bufio.NewScanner(os.Stdin)
+			for scanner.Scan() {
+				ch <- strings.TrimSpace(scanner.Text())
+			}
+			close(ch)
+		}()
+		return true
+	} else {
+		// not piped
+		return false
 	}
-	return getStdin()
 }
 
 func validateRelayURLs(wsurls []string) error {
@@ -49,3 +84,28 @@ func validateRelayURLs(wsurls []string) error {
 
 	return nil
 }
+
+func validate32BytesHex(target string) error {
+	if _, err := hex.DecodeString(target); err != nil {
+		return fmt.Errorf("target '%s' is not valid hex: %s", target, err)
+	}
+	if len(target) != 64 {
+		return fmt.Errorf("expected '%s' to be 64 characters (32 bytes), got %d", target, len(target))
+	}
+	if strings.ToLower(target) != target {
+		return fmt.Errorf("expected target to be all lowercase hex. try again with '%s'", strings.ToLower(target))
+	}
+
+	return nil
+}
+
+func lineProcessingError(c *cli.Context, msg string, args ...any) {
+	c.Context = context.WithValue(c.Context, LINE_PROCESSING_ERROR, true)
+	fmt.Fprintf(os.Stderr, msg+"\n", args...)
+}
+
+func exitIfLineProcessingError(c *cli.Context) {
+	if val := c.Context.Value(LINE_PROCESSING_ERROR); val != nil && val.(bool) {
+		os.Exit(123)
+	}
+}

main.go

@@ -7,8 +7,7 @@ import (
 	"github.com/urfave/cli/v2"
 )
 
-func main() {
-	app := &cli.App{
+var app = &cli.App{
 	Name:  "nak",
 	Usage: "the nostr army knife command-line tool",
 	Commands: []*cli.Command{
@@ -20,8 +19,9 @@ func main() {
 		encode,
 		verify,
 	},
-	}
+}
 
+func main() {
 	if err := app.Run(os.Args); err != nil {
 		fmt.Println(err)
 		os.Exit(1)

req.go

@@ -95,10 +95,12 @@ example:
 	},
 	ArgsUsage: "[relay...]",
 	Action: func(c *cli.Context) error {
+		for stdinFilter := range getStdinLinesOrBlank() {
 			filter := nostr.Filter{}
-		if stdinFilter := getStdin(); stdinFilter != "" {
+			if stdinFilter != "" {
 				if err := json.Unmarshal([]byte(stdinFilter), &filter); err != nil {
-				return fmt.Errorf("invalid filter received from stdin: %w", err)
+					lineProcessingError(c, "invalid filter '%s' received from stdin: %s", stdinFilter, err)
+					continue
 				}
 			}
 
@@ -175,7 +177,9 @@ example:
 
 				fmt.Println(result)
 			}
+		}
 
+		exitIfLineProcessingError(c)
 		return nil
 	},
 }

verify.go

@@ -2,7 +2,6 @@ package main
 
 import (
 	"encoding/json"
-	"fmt"
 
 	"github.com/nbd-wtf/go-nostr"
 	"github.com/urfave/cli/v2"
@@ -17,21 +16,27 @@ var verify = &cli.Command{
 it outputs nothing if the verification is successful.
 `,
 	Action: func(c *cli.Context) error {
+		for stdinEvent := range getStdinLinesOrBlank() {
 			evt := nostr.Event{}
-		if stdinEvent := getStdin(); stdinEvent != "" {
+			if stdinEvent != "" {
 				if err := json.Unmarshal([]byte(stdinEvent), &evt); err != nil {
-				return fmt.Errorf("invalid JSON: %w", err)
+					lineProcessingError(c, "invalid event: %s", err)
+					continue
 				}
 			}
 
 			if evt.GetID() != evt.ID {
-			return fmt.Errorf("invalid .id, expected %s, got %s", evt.GetID(), evt.ID)
+				lineProcessingError(c, "invalid .id, expected %s, got %s", evt.GetID(), evt.ID)
+				continue
 			}
 
 			if ok, err := evt.CheckSignature(); !ok {
-			return fmt.Errorf("invalid signature: %w", err)
+				lineProcessingError(c, "invalid signature: %s", err)
+				continue
+			}
 		}
 
+		exitIfLineProcessingError(c)
 		return nil
 	},
 }