nak req --spell for creating spells.

req.go

@@ -92,6 +92,10 @@ example:
 				Usage:    "after connecting, for a nip42 \"AUTH\" message to be received, act on it and only then send the \"REQ\"",
 				Category: CATEGORY_SIGNER,
 			},
+			&cli.BoolFlag{
+				Name:  "spell",
+				Usage: "output a spell event (kind 777) instead of a filter",
+			},
 		)...,
 	),
 	ArgsUsage: "[relay...]",
@@ -111,7 +115,16 @@ example:
 			return fmt.Errorf("incompatible flags --paginate and --outbox")
 		}
 
+		if c.Bool("bare") && c.Bool("spell") {
+			return fmt.Errorf("incompatible flags --bare and --spell")
+		}
+
 		relayUrls := c.Args().Slice()
+
+		if len(relayUrls) > 0 && (c.Bool("bare") || c.Bool("spell")) {
+			return fmt.Errorf("relay URLs are incompatible with --bare or --spell")
+		}
+
 		if len(relayUrls) > 0 && !negentropy {
 			// this is used both for the normal AUTH (after "auth-required:" is received) or forced pre-auth
 			// connect to all relays we expect to use in this call in parallel
@@ -225,15 +238,26 @@ example:
 					performReq(ctx, filter, relayUrls, c.Bool("stream"), c.Bool("outbox"), c.Uint("outbox-relays-per-pubkey"), c.Bool("paginate"), c.Duration("paginate-interval"), "nak-req")
 				}
 			} else {
-				// no relays given, will just print the filter
+				// no relays given, will just print the filter or spell
 				var result string
-				if c.Bool("bare") {
+				if c.Bool("spell") {
+					// output a spell event instead of a filter
+					kr, _, err := gatherKeyerFromArguments(ctx, c)
+					if err != nil {
+						return err
+					}
+					spellEvent := createSpellEvent(ctx, filter, kr)
+					j, _ := json.Marshal(spellEvent)
+					result = string(j)
+				} else if c.Bool("bare") {
+					// bare filter output
 					result = filter.String()
 				} else {
+					// normal filter
 					j, _ := json.Marshal(nostr.ReqEnvelope{SubscriptionID: "nak", Filters: []nostr.Filter{filter}})
 					result = string(j)
-				}
 
+				}
 				stdout(result)
 			}
 		}

spell.go

@@ -471,3 +471,77 @@ func logSpellDetails(spell nostr.Event) {
 		desc,
 	)
 }
+
+func createSpellEvent(ctx context.Context, filter nostr.Filter, kr nostr.Keyer) nostr.Event {
+	spell := nostr.Event{
+		Kind: 777,
+		Tags: make(nostr.Tags, 0),
+	}
+
+	// add cmd tag
+	spell.Tags = append(spell.Tags, nostr.Tag{"cmd", "REQ"})
+
+	// add kinds
+	if len(filter.Kinds) > 0 {
+		kindTag := nostr.Tag{"k"}
+		for _, kind := range filter.Kinds {
+			kindTag = append(kindTag, strconv.Itoa(int(kind)))
+		}
+		spell.Tags = append(spell.Tags, kindTag)
+	}
+
+	// add authors
+	if len(filter.Authors) > 0 {
+		authorsTag := nostr.Tag{"authors"}
+		for _, author := range filter.Authors {
+			authorsTag = append(authorsTag, author.Hex())
+		}
+		spell.Tags = append(spell.Tags, authorsTag)
+	}
+
+	// add ids
+	if len(filter.IDs) > 0 {
+		idsTag := nostr.Tag{"ids"}
+		for _, id := range filter.IDs {
+			idsTag = append(idsTag, id.Hex())
+		}
+		spell.Tags = append(spell.Tags, idsTag)
+	}
+
+	// add tags
+	for tagName, values := range filter.Tags {
+		if len(values) > 0 {
+			tag := nostr.Tag{"tag", tagName}
+			for _, value := range values {
+				tag = append(tag, value)
+			}
+			spell.Tags = append(spell.Tags, tag)
+		}
+	}
+
+	// add limit
+	if filter.Limit > 0 {
+		spell.Tags = append(spell.Tags, nostr.Tag{"limit", strconv.Itoa(filter.Limit)})
+	}
+
+	// add since
+	if filter.Since > 0 {
+		spell.Tags = append(spell.Tags, nostr.Tag{"since", strconv.FormatInt(int64(filter.Since), 10)})
+	}
+
+	// add until
+	if filter.Until > 0 {
+		spell.Tags = append(spell.Tags, nostr.Tag{"until", strconv.FormatInt(int64(filter.Until), 10)})
+	}
+
+	// add search
+	if filter.Search != "" {
+		spell.Tags = append(spell.Tags, nostr.Tag{"search", filter.Search})
+	}
+
+	if err := kr.SignEvent(ctx, &spell); err != nil {
+		log("failed to sign spell: %s\n", err)
+	}
+
+	return spell
+}