add author tag.

fixes https://github.com/fiatjaf/khatru/issues/2

README.md

@@ -1,5 +1,7 @@
 # khatru, a relay framework [![docs badge](https://img.shields.io/badge/docs-reference-blue)](https://pkg.go.dev/github.com/fiatjaf/khatru#Relay)
 
+`author: pablof7z`
+
 [![Run Tests](https://github.com/fiatjaf/khatru/actions/workflows/test.yml/badge.svg)](https://github.com/fiatjaf/khatru/actions/workflows/test.yml)
 [![Go Reference](https://pkg.go.dev/badge/github.com/fiatjaf/khatru.svg)](https://pkg.go.dev/github.com/fiatjaf/khatru)
 [![Go Report Card](https://goreportcard.com/badge/github.com/fiatjaf/khatru)](https://goreportcard.com/report/github.com/fiatjaf/khatru)
@@ -34,7 +36,7 @@ func main() {
 	relay.Info.Name = "my relay"
 	relay.Info.PubKey = "79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798"
 	relay.Info.Description = "this is my custom relay"
-	relay.Info.Icon = "https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Fliquipedia.net%2Fcommons%2Fimages%2F3%2F35%2FSCProbe.jpg&f=1&nofb=1&ipt=0cbbfef25bce41da63d910e86c3c343e6c3b9d63194ca9755351bb7c2efa3359&ipo=images"
+	relay.Info.IconURL = "https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Fliquipedia.net%2Fcommons%2Fimages%2F3%2F35%2FSCProbe.jpg&f=1&nofb=1&ipt=0cbbfef25bce41da63d910e86c3c343e6c3b9d63194ca9755351bb7c2efa3359&ipo=images"
 
 	// you must bring your own storage scheme -- if you want to have any
 	store := make(map[string]*nostr.Event, 120)
@@ -69,11 +71,6 @@ func main() {
 
 	// there are many other configurable things you can set
 	relay.RejectEvent = append(relay.RejectEvent,
-		// built-in policies
-		policies.ValidateKind,
-
-		// define your own policies
-		policies.PreventLargeTags(80),
 		func(ctx context.Context, event *nostr.Event) (reject bool, msg string) {
 			if event.PubKey == "fa984bd7dbb282f07e16e7ae87b26a2a7b9b90b7246a44771f0cf5ae58018f52" {
 				return true, "we don't allow this person to write here"
@@ -81,21 +78,16 @@ func main() {
 			return false, "" // anyone else can
 		},
 	)
-
-	// you can request auth by rejecting an event or a request with the prefix "auth-required: "
-	relay.RejectFilter = append(relay.RejectFilter,
-		// built-in policies
-		policies.NoComplexFilters,
-
-		// define your own policies
-		func(ctx context.Context, filter nostr.Filter) (reject bool, msg string) {
-			if pubkey := khatru.GetAuthed(ctx); pubkey != "" {
-				log.Printf("request from %s\n", pubkey)
-				return false, ""
-			}
-			return true, "auth-required: only authenticated users can read from this relay"
-			// (this will cause an AUTH message to be sent and then a CLOSED message such that clients can
-			//  authenticate and then request again)
+	relay.OnConnect = append(relay.OnConnect,
+		func(ctx context.Context) {
+			// request NIP-42 AUTH from everybody
+			relay.RequestAuth(ctx)
+		},
+	)
+	relay.OnAuth = append(relay.OnAuth,
+		func(ctx context.Context, pubkey string) {
+			// and when they auth we just log that for nothing
+			log.Println(pubkey + " is authed!")
 		},
 	)
 	// check the docs for more goodies!
@@ -128,13 +120,3 @@ Fear no more. Using the https://github.com/fiatjaf/eventstore module you get a b
 	relay.CountEvents = append(relay.CountEvents, db.CountEvents)
 	relay.DeleteEvent = append(relay.DeleteEvent, db.DeleteEvent)
 ```
-
-### But I don't want to write a bunch of custom policies!
-
-Fear no more. We have a bunch of common policies written in the `github.com/fiatjaf/khatru/policies` package and also a handpicked selection of base sane defaults, which you can apply with:
-
-```go
-	policies.ApplySaneDefaults(relay)
-```
-
-Contributions to this are very much welcomed.

add-event.go

@@ -0,0 +1,130 @@
+package khatru
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/fiatjaf/eventstore"
+	"github.com/nbd-wtf/go-nostr"
+)
+
+func (rl *Relay) AddEvent(ctx context.Context, evt *nostr.Event) error {
+	if evt == nil {
+		return fmt.Errorf("event is nil")
+	}
+
+	for _, reject := range rl.RejectEvent {
+		if reject, msg := reject(ctx, evt); reject {
+			if msg == "" {
+				msg = "no reason"
+			}
+			return fmt.Errorf(msg)
+		}
+	}
+
+	if 20000 <= evt.Kind && evt.Kind < 30000 {
+		// do not store ephemeral events
+	} else {
+		if evt.Kind == 0 || evt.Kind == 3 || (10000 <= evt.Kind && evt.Kind < 20000) {
+			// replaceable event, delete before storing
+			for _, query := range rl.QueryEvents {
+				ch, err := query(ctx, nostr.Filter{Authors: []string{evt.PubKey}, Kinds: []int{evt.Kind}})
+				if err != nil {
+					continue
+				}
+				if previous := <-ch; previous != nil && isOlder(previous, evt) {
+					for _, del := range rl.DeleteEvent {
+						del(ctx, previous)
+					}
+				}
+			}
+		} else if 30000 <= evt.Kind && evt.Kind < 40000 {
+			// parameterized replaceable event, delete before storing
+			d := evt.Tags.GetFirst([]string{"d", ""})
+			if d != nil {
+				for _, query := range rl.QueryEvents {
+					ch, err := query(ctx, nostr.Filter{Authors: []string{evt.PubKey}, Kinds: []int{evt.Kind}, Tags: nostr.TagMap{"d": []string{d.Value()}}})
+					if err != nil {
+						continue
+					}
+					if previous := <-ch; previous != nil && isOlder(previous, evt) {
+						for _, del := range rl.DeleteEvent {
+							del(ctx, previous)
+						}
+					}
+				}
+			}
+		}
+
+		// store
+		for _, store := range rl.StoreEvent {
+			if saveErr := store(ctx, evt); saveErr != nil {
+				switch saveErr {
+				case eventstore.ErrDupEvent:
+					return nil
+				default:
+					errmsg := saveErr.Error()
+					if nip20prefixmatcher.MatchString(errmsg) {
+						return saveErr
+					} else {
+						return fmt.Errorf("error: failed to save (%s)", errmsg)
+					}
+				}
+			}
+		}
+
+		for _, ons := range rl.OnEventSaved {
+			ons(ctx, evt)
+		}
+	}
+
+	for _, ovw := range rl.OverwriteResponseEvent {
+		ovw(ctx, evt)
+	}
+	notifyListeners(evt)
+
+	return nil
+}
+
+func (rl *Relay) handleDeleteRequest(ctx context.Context, evt *nostr.Event) error {
+	// event deletion -- nip09
+	for _, tag := range evt.Tags {
+		if len(tag) >= 2 && tag[0] == "e" {
+			// first we fetch the event
+			for _, query := range rl.QueryEvents {
+				ch, err := query(ctx, nostr.Filter{IDs: []string{tag[1]}})
+				if err != nil {
+					continue
+				}
+				target := <-ch
+				if target == nil {
+					continue
+				}
+				// got the event, now check if the user can delete it
+				acceptDeletion := target.PubKey == evt.PubKey
+				var msg string
+				if acceptDeletion == false {
+					msg = "you are not the author of this event"
+				}
+				// but if we have a function to overwrite this outcome, use that instead
+				for _, odo := range rl.OverwriteDeletionOutcome {
+					acceptDeletion, msg = odo(ctx, target, evt)
+				}
+				if acceptDeletion {
+					// delete it
+					for _, del := range rl.DeleteEvent {
+						del(ctx, target)
+					}
+				} else {
+					// fail and stop here
+					return fmt.Errorf("blocked: %s", msg)
+				}
+
+				// don't try to query this same event again
+				break
+			}
+		}
+	}
+
+	return nil
+}

adding.go

@@ -1,107 +0,0 @@
-package khatru
-
-import (
-	"context"
-	"errors"
-	"fmt"
-
-	"github.com/fiatjaf/eventstore"
-	"github.com/nbd-wtf/go-nostr"
-)
-
-// AddEvent sends an event through then normal add pipeline, as if it was received from a websocket.
-func (rl *Relay) AddEvent(ctx context.Context, evt *nostr.Event) (skipBroadcast bool, writeError error) {
-	if evt == nil {
-		return false, errors.New("error: event is nil")
-	}
-
-	for _, reject := range rl.RejectEvent {
-		if reject, msg := reject(ctx, evt); reject {
-			if msg == "" {
-				return false, errors.New("blocked: no reason")
-			} else {
-				return false, errors.New(nostr.NormalizeOKMessage(msg, "blocked"))
-			}
-		}
-	}
-
-	if 20000 <= evt.Kind && evt.Kind < 30000 {
-		// do not store ephemeral events
-		for _, oee := range rl.OnEphemeralEvent {
-			oee(ctx, evt)
-		}
-	} else {
-		// will store
-
-		// but first check if we already have it
-		filter := nostr.Filter{IDs: []string{evt.ID}}
-		for _, query := range rl.QueryEvents {
-			ch, err := query(ctx, filter)
-			if err != nil {
-				continue
-			}
-			for range ch {
-				// if we run this it means we already have this event, so we just return a success and exit
-				return true, nil
-			}
-		}
-
-		// if it's replaceable we first delete old versions
-		if evt.Kind == 0 || evt.Kind == 3 || (10000 <= evt.Kind && evt.Kind < 20000) {
-			// replaceable event, delete before storing
-			filter := nostr.Filter{Authors: []string{evt.PubKey}, Kinds: []int{evt.Kind}}
-			for _, query := range rl.QueryEvents {
-				ch, err := query(ctx, filter)
-				if err != nil {
-					continue
-				}
-				for previous := range ch {
-					if isOlder(previous, evt) {
-						for _, del := range rl.DeleteEvent {
-							del(ctx, previous)
-						}
-					}
-				}
-			}
-		} else if 30000 <= evt.Kind && evt.Kind < 40000 {
-			// parameterized replaceable event, delete before storing
-			d := evt.Tags.GetFirst([]string{"d", ""})
-			if d == nil {
-				return false, fmt.Errorf("invalid: missing 'd' tag on parameterized replaceable event")
-			}
-
-			filter := nostr.Filter{Authors: []string{evt.PubKey}, Kinds: []int{evt.Kind}, Tags: nostr.TagMap{"d": []string{(*d)[1]}}}
-			for _, query := range rl.QueryEvents {
-				ch, err := query(ctx, filter)
-				if err != nil {
-					continue
-				}
-				for previous := range ch {
-					if isOlder(previous, evt) {
-						for _, del := range rl.DeleteEvent {
-							del(ctx, previous)
-						}
-					}
-				}
-			}
-		}
-
-		// store
-		for _, store := range rl.StoreEvent {
-			if saveErr := store(ctx, evt); saveErr != nil {
-				switch saveErr {
-				case eventstore.ErrDupEvent:
-					return true, nil
-				default:
-					return false, fmt.Errorf(nostr.NormalizeOKMessage(saveErr.Error(), "error"))
-				}
-			}
-		}
-
-		for _, ons := range rl.OnEventSaved {
-			ons(ctx, evt)
-		}
-	}
-
-	return false, nil
-}

broadcasting.go

@@ -1,11 +0,0 @@
-package khatru
-
-import (
-	"github.com/nbd-wtf/go-nostr"
-)
-
-// BroadcastEvent emits an event to all listeners whose filters' match, skipping all filters and actions
-// it also doesn't attempt to store the event or trigger any reactions or callbacks
-func (rl *Relay) BroadcastEvent(evt *nostr.Event) {
-	notifyListeners(evt)
-}

deleting.go

@@ -1,53 +0,0 @@
-package khatru
-
-import (
-	"context"
-	"fmt"
-
-	"github.com/nbd-wtf/go-nostr"
-)
-
-func (rl *Relay) handleDeleteRequest(ctx context.Context, evt *nostr.Event) error {
-	// event deletion -- nip09
-	for _, tag := range evt.Tags {
-		if len(tag) >= 2 && tag[0] == "e" {
-			// first we fetch the event
-			for _, query := range rl.QueryEvents {
-				ch, err := query(ctx, nostr.Filter{IDs: []string{tag[1]}})
-				if err != nil {
-					continue
-				}
-				target := <-ch
-				if target == nil {
-					continue
-				}
-				// got the event, now check if the user can delete it
-				acceptDeletion := target.PubKey == evt.PubKey
-				var msg string
-				if acceptDeletion == false {
-					msg = "you are not the author of this event"
-				}
-				// but if we have a function to overwrite this outcome, use that instead
-				for _, odo := range rl.OverwriteDeletionOutcome {
-					acceptDeletion, msg = odo(ctx, target, evt)
-				}
-				if acceptDeletion {
-					// delete it
-					for _, del := range rl.DeleteEvent {
-						if err := del(ctx, target); err != nil {
-							return err
-						}
-					}
-				} else {
-					// fail and stop here
-					return fmt.Errorf("blocked: %s", msg)
-				}
-
-				// don't try to query this same event again
-				break
-			}
-		}
-	}
-
-	return nil
-}

examples/basic-elasticsearch/main.go

@@ -4,8 +4,8 @@ import (
 	"fmt"
 	"net/http"
 
-	"github.com/fiatjaf/eventstore/elasticsearch"
 	"github.com/fiatjaf/khatru"
+	"github.com/fiatjaf/eventstore/elasticsearch"
 )
 
 func main() {

examples/basic-postgres/main.go

@@ -4,8 +4,8 @@ import (
 	"fmt"
 	"net/http"
 
-	"github.com/fiatjaf/eventstore/postgresql"
 	"github.com/fiatjaf/khatru"
+	"github.com/fiatjaf/eventstore/postgresql"
 )
 
 func main() {

examples/basic-sqlite3/main.go

@@ -4,8 +4,8 @@ import (
 	"fmt"
 	"net/http"
 
-	"github.com/fiatjaf/eventstore/sqlite3"
 	"github.com/fiatjaf/khatru"
+	"github.com/fiatjaf/eventstore/sqlite3"
 )
 
 func main() {

examples/exclusive/main.go

@@ -8,7 +8,7 @@ import (
 
 	"github.com/fiatjaf/eventstore/lmdb"
 	"github.com/fiatjaf/khatru"
-	"github.com/fiatjaf/khatru/policies"
+	"github.com/fiatjaf/khatru/plugins"
 	"github.com/nbd-wtf/go-nostr"
 )
 
@@ -26,8 +26,8 @@ func main() {
 	relay.CountEvents = append(relay.CountEvents, db.CountEvents)
 	relay.DeleteEvent = append(relay.DeleteEvent, db.DeleteEvent)
 
-	relay.RejectEvent = append(relay.RejectEvent, policies.PreventTooManyIndexableTags(10, nil, nil))
-	relay.RejectFilter = append(relay.RejectFilter, policies.NoComplexFilters)
+	relay.RejectEvent = append(relay.RejectEvent, plugins.PreventTooManyIndexableTags(10))
+	relay.RejectFilter = append(relay.RejectFilter, plugins.NoComplexFilters)
 
 	relay.OnEventSaved = append(relay.OnEventSaved, func(ctx context.Context, event *nostr.Event) {
 	})

examples/readme-demo/main.go

@@ -7,7 +7,6 @@ import (
 	"net/http"
 
 	"github.com/fiatjaf/khatru"
-	"github.com/fiatjaf/khatru/policies"
 	"github.com/nbd-wtf/go-nostr"
 )
 
@@ -54,11 +53,6 @@ func main() {
 
 	// there are many other configurable things you can set
 	relay.RejectEvent = append(relay.RejectEvent,
-		// built-in policies
-		policies.ValidateKind,
-
-		// define your own policies
-		policies.PreventLargeTags(80),
 		func(ctx context.Context, event *nostr.Event) (reject bool, msg string) {
 			if event.PubKey == "fa984bd7dbb282f07e16e7ae87b26a2a7b9b90b7246a44771f0cf5ae58018f52" {
 				return true, "we don't allow this person to write here"
@@ -66,21 +60,16 @@ func main() {
 			return false, "" // anyone else can
 		},
 	)
-
-	// you can request auth by rejecting an event or a request with the prefix "auth-required: "
-	relay.RejectFilter = append(relay.RejectFilter,
-		// built-in policies
-		policies.NoComplexFilters,
-
-		// define your own policies
-		func(ctx context.Context, filter nostr.Filter) (reject bool, msg string) {
-			if pubkey := khatru.GetAuthed(ctx); pubkey != "" {
-				log.Printf("request from %s\n", pubkey)
-				return false, ""
-			}
-			return true, "auth-required: only authenticated users can read from this relay"
-			// (this will cause an AUTH message to be sent and then a CLOSED message such that clients can
-			//  authenticate and then request again)
+	relay.OnConnect = append(relay.OnConnect,
+		func(ctx context.Context) {
+			// request NIP-42 AUTH from everybody
+			relay.RequestAuth(ctx)
+		},
+	)
+	relay.OnAuth = append(relay.OnAuth,
+		func(ctx context.Context, pubkey string) {
+			// and when they auth we just log that for nothing
+			log.Println(pubkey + " is authed!")
 		},
 	)
 	// check the docs for more goodies!

go.mod

@@ -1,19 +1,20 @@
 module github.com/fiatjaf/khatru
 
-go 1.21.4
+go 1.21.0
 
 require (
-	github.com/fasthttp/websocket v1.5.7
-	github.com/fiatjaf/eventstore v0.5.0
-	github.com/nbd-wtf/go-nostr v0.34.2
-	github.com/puzpuzpuz/xsync/v3 v3.0.2
+	github.com/fasthttp/websocket v1.5.3
+	github.com/fiatjaf/eventstore v0.1.0
+	github.com/nbd-wtf/go-nostr v0.25.7
+	github.com/puzpuzpuz/xsync/v2 v2.5.1
 	github.com/rs/cors v1.7.0
+	golang.org/x/exp v0.0.0-20230425010034-47ecfdc1ba53
 )
 
 require (
-	github.com/PowerDNS/lmdb-go v1.9.2 // indirect
 	github.com/andybalholm/brotli v1.0.5 // indirect
 	github.com/aquasecurity/esquery v0.2.0 // indirect
+	github.com/bmatsuo/lmdb-go v1.8.0 // indirect
 	github.com/btcsuite/btcd/btcec/v2 v2.3.2 // indirect
 	github.com/btcsuite/btcd/chaincfg/chainhash v1.0.2 // indirect
 	github.com/cespare/xxhash/v2 v2.2.0 // indirect
@@ -21,36 +22,35 @@ require (
 	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.2.0 // indirect
 	github.com/dgraph-io/badger/v4 v4.2.0 // indirect
 	github.com/dgraph-io/ristretto v0.1.1 // indirect
-	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/dustin/go-humanize v1.0.0 // indirect
 	github.com/elastic/elastic-transport-go/v8 v8.3.0 // indirect
-	github.com/elastic/go-elasticsearch/v7 v7.17.10 // indirect
+	github.com/elastic/go-elasticsearch/v7 v7.6.0 // indirect
 	github.com/elastic/go-elasticsearch/v8 v8.10.1 // indirect
 	github.com/fatih/structs v1.1.0 // indirect
 	github.com/gobwas/httphead v0.1.0 // indirect
 	github.com/gobwas/pool v0.2.1 // indirect
-	github.com/gobwas/ws v1.3.1 // indirect
+	github.com/gobwas/ws v1.2.0 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
-	github.com/golang/glog v1.1.2 // indirect
-	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
-	github.com/golang/protobuf v1.5.3 // indirect
-	github.com/golang/snappy v0.0.4 // indirect
-	github.com/google/flatbuffers v23.5.26+incompatible // indirect
+	github.com/golang/glog v1.0.0 // indirect
+	github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/golang/snappy v0.0.3 // indirect
+	github.com/google/flatbuffers v1.12.1 // indirect
 	github.com/jmoiron/sqlx v1.3.5 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
-	github.com/klauspost/compress v1.17.8 // indirect
+	github.com/klauspost/compress v1.16.5 // indirect
 	github.com/lib/pq v1.10.9 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
-	github.com/mattn/go-sqlite3 v1.14.18 // indirect
+	github.com/mattn/go-sqlite3 v1.14.17 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/savsgio/gotils v0.0.0-20230208104028-c358bd845dee // indirect
-	github.com/tidwall/gjson v1.17.0 // indirect
+	github.com/tidwall/gjson v1.14.4 // indirect
 	github.com/tidwall/match v1.1.1 // indirect
-	github.com/tidwall/pretty v1.2.1 // indirect
+	github.com/tidwall/pretty v1.2.0 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
-	github.com/valyala/fasthttp v1.51.0 // indirect
-	go.opencensus.io v0.24.0 // indirect
-	golang.org/x/exp v0.0.0-20231006140011-7918f672742d // indirect
-	golang.org/x/net v0.18.0 // indirect
-	golang.org/x/sys v0.20.0 // indirect
-	google.golang.org/protobuf v1.31.0 // indirect
+	github.com/valyala/fasthttp v1.47.0 // indirect
+	go.opencensus.io v0.22.5 // indirect
+	golang.org/x/net v0.8.0 // indirect
+	golang.org/x/sys v0.8.0 // indirect
+	google.golang.org/protobuf v1.28.1 // indirect
 )

go.sum

@@ -1,21 +1,19 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
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 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
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-golang.org/x/exp v0.0.0-20231006140011-7918f672742d/go.mod h1:ldy0pHrwJyGW56pPQzzkH36rKxoZW1tw7ZJpeKx+hdo=
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 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
@@ -169,30 +139,30 @@ golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
-golang.org/x/net v0.0.0-20201110031124-69a78807bb2b/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
-golang.org/x/net v0.18.0 h1:mIYleuAkSbHh0tCv7RvjL3F6ZVbLjq4+R7zbOn3Kokg=
-golang.org/x/net v0.18.0/go.mod h1:/czyP5RqHAH4odGYxBJ1qz0+CE5WZ+2j1YgoEo8F2jQ=
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 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
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 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.20.0 h1:Od9JTbYCk261bKm4M/mw7AklTlFYIa0bIp9BgSm1S8Y=
-golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
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 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
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 golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
-golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
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@@ -203,30 +173,15 @@ golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8T
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
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 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
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 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
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 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

handlers.go

@@ -5,7 +5,7 @@ import (
 	"crypto/rand"
 	"crypto/sha256"
 	"encoding/hex"
-	"errors"
+	"encoding/json"
 	"net/http"
 	"strings"
 	"sync"
@@ -14,33 +14,21 @@ import (
 	"github.com/fasthttp/websocket"
 	"github.com/nbd-wtf/go-nostr"
 	"github.com/nbd-wtf/go-nostr/nip42"
-	"github.com/rs/cors"
 )
 
 // ServeHTTP implements http.Handler interface.
 func (rl *Relay) ServeHTTP(w http.ResponseWriter, r *http.Request) {
-	if rl.ServiceURL == "" {
-		rl.ServiceURL = getServiceBaseURL(r)
-	}
-
 	if r.Header.Get("Upgrade") == "websocket" {
 		rl.HandleWebsocket(w, r)
 	} else if r.Header.Get("Accept") == "application/nostr+json" {
-		cors.AllowAll().Handler(http.HandlerFunc(rl.HandleNIP11)).ServeHTTP(w, r)
-	} else if r.Header.Get("Content-Type") == "application/nostr+json+rpc" {
-		cors.AllowAll().Handler(http.HandlerFunc(rl.HandleNIP86)).ServeHTTP(w, r)
+		rl.HandleNIP11(w, r)
 	} else {
 		rl.serveMux.ServeHTTP(w, r)
 	}
 }
 
 func (rl *Relay) HandleWebsocket(w http.ResponseWriter, r *http.Request) {
-	for _, reject := range rl.RejectConnection {
-		if reject(r) {
-			w.WriteHeader(429) // Too many requests
-			return
-		}
-	}
+	ctx := r.Context()
 
 	conn, err := rl.upgrader.Upgrade(w, r, nil)
 	if err != nil {
@@ -55,34 +43,21 @@ func (rl *Relay) HandleWebsocket(w http.ResponseWriter, r *http.Request) {
 	rand.Read(challenge)
 
 	ws := &WebSocket{
-		conn:      conn,
-		Request:   r,
-		Challenge: hex.EncodeToString(challenge),
-	}
-
-	ctx, cancel := context.WithCancel(
-		context.WithValue(
-			context.Background(),
-			wsKey, ws,
-		),
-	)
-
-	kill := func() {
-		for _, ondisconnect := range rl.OnDisconnect {
-			ondisconnect(ctx)
-		}
-
-		ticker.Stop()
-		cancel()
-		if _, ok := rl.clients.Load(conn); ok {
-			conn.Close()
-			rl.clients.Delete(conn)
-			removeListener(ws)
-		}
+		conn:           conn,
+		Challenge:      hex.EncodeToString(challenge),
+		WaitingForAuth: make(chan struct{}),
 	}
 
+	// reader
 	go func() {
-		defer kill()
+		defer func() {
+			ticker.Stop()
+			if _, ok := rl.clients.Load(conn); ok {
+				conn.Close()
+				rl.clients.Delete(conn)
+				removeListener(ws)
+			}
+		}()
 
 		conn.SetReadLimit(rl.MaxMessageSize)
 		conn.SetReadDeadline(time.Now().Add(rl.PongWait))
@@ -100,15 +75,13 @@ func (rl *Relay) HandleWebsocket(w http.ResponseWriter, r *http.Request) {
 			if err != nil {
 				if websocket.IsUnexpectedCloseError(
 					err,
-					websocket.CloseNormalClosure,    // 1000
 					websocket.CloseGoingAway,        // 1001
 					websocket.CloseNoStatusReceived, // 1005
 					websocket.CloseAbnormalClosure,  // 1006
-					4537,                            // some client seems to send many of these
 				) {
 					rl.Log.Printf("unexpected close error from %s: %v\n", r.Header.Get("X-Forwarded-For"), err)
 				}
-				return
+				break
 			}
 
 			if typ == websocket.PingMessage {
@@ -117,155 +90,152 @@ func (rl *Relay) HandleWebsocket(w http.ResponseWriter, r *http.Request) {
 			}
 
 			go func(message []byte) {
-				envelope := nostr.ParseMessage(message)
-				if envelope == nil {
+				ctx = context.Background()
+
+				var request []json.RawMessage
+				if err := json.Unmarshal(message, &request); err != nil {
 					// stop silently
 					return
 				}
 
-				switch env := envelope.(type) {
-				case *nostr.EventEnvelope:
-					// check id
-					hash := sha256.Sum256(env.Event.Serialize())
-					id := hex.EncodeToString(hash[:])
-					if id != env.Event.ID {
-						ws.WriteJSON(nostr.OKEnvelope{EventID: env.Event.ID, OK: false, Reason: "invalid: id is computed incorrectly"})
+				if len(request) < 2 {
+					ws.WriteJSON(nostr.NoticeEnvelope("request has less than 2 parameters"))
+					return
+				}
+
+				var typ string
+				json.Unmarshal(request[0], &typ)
+
+				switch typ {
+				case "EVENT":
+					// it's a new event
+					var evt nostr.Event
+					if err := json.Unmarshal(request[1], &evt); err != nil {
+						ws.WriteJSON(nostr.NoticeEnvelope("failed to decode event: " + err.Error()))
 						return
 					}
 
-					// check signature
-					if ok, err := env.Event.CheckSignature(); err != nil {
-						ws.WriteJSON(nostr.OKEnvelope{EventID: env.Event.ID, OK: false, Reason: "error: failed to verify signature"})
+					// check serialization
+					serialized := evt.Serialize()
+
+					// assign ID
+					hash := sha256.Sum256(serialized)
+					evt.ID = hex.EncodeToString(hash[:])
+
+					// check signature (requires the ID to be set)
+					if ok, err := evt.CheckSignature(); err != nil {
+						ws.WriteJSON(nostr.OKEnvelope{EventID: evt.ID, OK: false, Reason: "error: failed to verify signature"})
 						return
 					} else if !ok {
-						ws.WriteJSON(nostr.OKEnvelope{EventID: env.Event.ID, OK: false, Reason: "invalid: signature is invalid"})
+						ws.WriteJSON(nostr.OKEnvelope{EventID: evt.ID, OK: false, Reason: "invalid: signature is invalid"})
 						return
 					}
 
-					// check NIP-70 protected
-					for _, v := range env.Event.Tags {
-						if len(v) == 1 && v[0] == "-" {
-							msg := "must be published by event author"
-							authed := GetAuthed(ctx)
-							if authed == "" {
-								RequestAuth(ctx)
-								ws.WriteJSON(nostr.OKEnvelope{
-									EventID: env.Event.ID,
-									OK:      false,
-									Reason:  "auth-required: " + msg,
-								})
-								return
-							}
-							if authed != env.Event.PubKey {
-								ws.WriteJSON(nostr.OKEnvelope{
-									EventID: env.Event.ID,
-									OK:      false,
-									Reason:  "blocked: " + msg,
-								})
-								return
-							}
-						}
-					}
-
 					var ok bool
-					var writeErr error
-					var skipBroadcast bool
-					if env.Event.Kind == 5 {
-						// this always returns "blocked: " whenever it returns an error
-						writeErr = rl.handleDeleteRequest(ctx, &env.Event)
+					if evt.Kind == 5 {
+						err = rl.handleDeleteRequest(ctx, &evt)
 					} else {
-						// this will also always return a prefixed reason
-						skipBroadcast, writeErr = rl.AddEvent(ctx, &env.Event)
+						err = rl.AddEvent(ctx, &evt)
 					}
 
 					var reason string
-					if writeErr == nil {
+					if err == nil {
 						ok = true
-						for _, ovw := range rl.OverwriteResponseEvent {
-							ovw(ctx, &env.Event)
-						}
-						if !skipBroadcast {
-							notifyListeners(&env.Event)
-						}
 					} else {
-						reason = writeErr.Error()
-						if strings.HasPrefix(reason, "auth-required:") {
-							RequestAuth(ctx)
-						}
+						reason = err.Error()
 					}
-					ws.WriteJSON(nostr.OKEnvelope{EventID: env.Event.ID, OK: ok, Reason: reason})
-				case *nostr.CountEnvelope:
+					ws.WriteJSON(nostr.OKEnvelope{EventID: evt.ID, OK: ok, Reason: reason})
+				case "COUNT":
 					if rl.CountEvents == nil {
-						ws.WriteJSON(nostr.ClosedEnvelope{SubscriptionID: env.SubscriptionID, Reason: "unsupported: this relay does not support NIP-45"})
+						ws.WriteJSON(nostr.NoticeEnvelope("this relay does not support NIP-45"))
 						return
 					}
-					var total int64
-					for _, filter := range env.Filters {
-						total += rl.handleCountRequest(ctx, ws, filter)
+
+					var id string
+					json.Unmarshal(request[1], &id)
+					if id == "" {
+						ws.WriteJSON(nostr.NoticeEnvelope("COUNT has no <id>"))
+						return
 					}
-					ws.WriteJSON(nostr.CountEnvelope{SubscriptionID: env.SubscriptionID, Count: &total})
-				case *nostr.ReqEnvelope:
-					eose := sync.WaitGroup{}
-					eose.Add(len(env.Filters))
 
-					// a context just for the "stored events" request handler
-					reqCtx, cancelReqCtx := context.WithCancelCause(ctx)
-
-					// expose subscription id in the context
-					reqCtx = context.WithValue(reqCtx, subscriptionIdKey, env.SubscriptionID)
-
-					// handle each filter separately -- dispatching events as they're loaded from databases
-					for _, filter := range env.Filters {
-						err := rl.handleRequest(reqCtx, env.SubscriptionID, &eose, ws, filter)
-						if err != nil {
-							// fail everything if any filter is rejected
-							reason := err.Error()
-							if strings.HasPrefix(reason, "auth-required:") {
-								RequestAuth(ctx)
-							}
-							ws.WriteJSON(nostr.ClosedEnvelope{SubscriptionID: env.SubscriptionID, Reason: reason})
-							cancelReqCtx(errors.New("filter rejected"))
-							return
+					var total int64
+					filters := make(nostr.Filters, len(request)-2)
+					for i, filterReq := range request[2:] {
+						if err := json.Unmarshal(filterReq, &filters[i]); err != nil {
+							ws.WriteJSON(nostr.NoticeEnvelope("failed to decode filter"))
+							continue
 						}
+						total += rl.handleCountRequest(ctx, ws, filters[i])
+					}
+
+					ws.WriteJSON([]interface{}{"COUNT", id, map[string]int64{"count": total}})
+				case "REQ":
+					var id string
+					json.Unmarshal(request[1], &id)
+					if id == "" {
+						ws.WriteJSON(nostr.NoticeEnvelope("REQ has no <id>"))
+						return
+					}
+
+					filters := make(nostr.Filters, len(request)-2)
+					eose := sync.WaitGroup{}
+					eose.Add(len(request[2:]))
+
+					for i, filterReq := range request[2:] {
+						if err := json.Unmarshal(filterReq, &filters[i]); err != nil {
+							ws.WriteJSON(nostr.NoticeEnvelope("failed to decode filter"))
+							eose.Done()
+							continue
+						}
+
+						go rl.handleRequest(ctx, id, &eose, ws, filters[i])
 					}
 
 					go func() {
-						// when all events have been loaded from databases and dispatched
-						// we can cancel the context and fire the EOSE message
 						eose.Wait()
-						cancelReqCtx(nil)
-						ws.WriteJSON(nostr.EOSEEnvelope(env.SubscriptionID))
+						ws.WriteJSON(nostr.EOSEEnvelope(id))
 					}()
 
-					setListener(env.SubscriptionID, ws, env.Filters, cancelReqCtx)
-				case *nostr.CloseEnvelope:
-					removeListenerId(ws, string(*env))
-				case *nostr.AuthEnvelope:
-					wsBaseUrl := strings.Replace(rl.ServiceURL, "http", "ws", 1)
-					if pubkey, ok := nip42.ValidateAuthEvent(&env.Event, ws.Challenge, wsBaseUrl); ok {
-						ws.AuthedPublicKey = pubkey
-						ws.authLock.Lock()
-						if ws.Authed != nil {
-							close(ws.Authed)
-							ws.Authed = nil
+					setListener(id, ws, filters)
+				case "CLOSE":
+					var id string
+					json.Unmarshal(request[1], &id)
+					if id == "" {
+						ws.WriteJSON(nostr.NoticeEnvelope("CLOSE has no <id>"))
+						return
+					}
+
+					removeListenerId(ws, id)
+				case "AUTH":
+					if rl.ServiceURL != "" {
+						var evt nostr.Event
+						if err := json.Unmarshal(request[1], &evt); err != nil {
+							ws.WriteJSON(nostr.NoticeEnvelope("failed to decode auth event: " + err.Error()))
+							return
+						}
+						if pubkey, ok := nip42.ValidateAuthEvent(&evt, ws.Challenge, rl.ServiceURL); ok {
+							ws.Authed = pubkey
+							close(ws.WaitingForAuth)
+							ctx = context.WithValue(ctx, AUTH_CONTEXT_KEY, pubkey)
+							ws.WriteJSON(nostr.OKEnvelope{EventID: evt.ID, OK: true})
+						} else {
+							ws.WriteJSON(nostr.OKEnvelope{EventID: evt.ID, OK: false, Reason: "error: failed to authenticate"})
 						}
-						ws.authLock.Unlock()
-						ws.WriteJSON(nostr.OKEnvelope{EventID: env.Event.ID, OK: true})
-					} else {
-						ws.WriteJSON(nostr.OKEnvelope{EventID: env.Event.ID, OK: false, Reason: "error: failed to authenticate"})
 					}
 				}
 			}(message)
 		}
 	}()
 
+	// writer
 	go func() {
-		defer kill()
+		defer func() {
+			ticker.Stop()
+			conn.Close()
+		}()
 
 		for {
 			select {
-			case <-ctx.Done():
-				return
 			case <-ticker.C:
 				err := ws.WriteMessage(websocket.PingMessage, nil)
 				if err != nil {
@@ -278,3 +248,8 @@ func (rl *Relay) HandleWebsocket(w http.ResponseWriter, r *http.Request) {
 		}
 	}()
 }
+
+func (rl *Relay) HandleNIP11(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", "application/nostr+json")
+	json.NewEncoder(w).Encode(rl.Info)
+}

helpers.go

@@ -1,77 +0,0 @@
-package khatru
-
-import (
-	"net"
-	"net/http"
-	"strconv"
-	"strings"
-
-	"github.com/nbd-wtf/go-nostr"
-)
-
-func isOlder(previous, next *nostr.Event) bool {
-	return previous.CreatedAt < next.CreatedAt ||
-		(previous.CreatedAt == next.CreatedAt && previous.ID > next.ID)
-}
-
-func getServiceBaseURL(r *http.Request) string {
-	host := r.Header.Get("X-Forwarded-Host")
-	if host == "" {
-		host = r.Host
-	}
-	proto := r.Header.Get("X-Forwarded-Proto")
-	if proto == "" {
-		if host == "localhost" {
-			proto = "http"
-		} else if strings.Index(host, ":") != -1 {
-			// has a port number
-			proto = "http"
-		} else if _, err := strconv.Atoi(strings.ReplaceAll(host, ".", "")); err == nil {
-			// it's a naked IP
-			proto = "http"
-		} else {
-			proto = "https"
-		}
-	}
-	return proto + "://" + host
-}
-
-var privateMasks = func() []net.IPNet {
-	privateCIDRs := []string{
-		"127.0.0.0/8",
-		"10.0.0.0/8",
-		"172.16.0.0/12",
-		"192.168.0.0/16",
-		"fc00::/7",
-	}
-	masks := make([]net.IPNet, len(privateCIDRs))
-	for i, cidr := range privateCIDRs {
-		_, netw, err := net.ParseCIDR(cidr)
-		if err != nil {
-			return nil
-		}
-		masks[i] = *netw
-	}
-	return masks
-}()
-
-func isPrivate(ip net.IP) bool {
-	for _, mask := range privateMasks {
-		if mask.Contains(ip) {
-			return true
-		}
-	}
-	return false
-}
-
-func GetIPFromRequest(r *http.Request) string {
-	if xffh := r.Header.Get("X-Forwarded-For"); xffh != "" {
-		for _, v := range strings.Split(xffh, ",") {
-			if ip := net.ParseIP(strings.TrimSpace(v)); ip != nil && ip.IsGlobalUnicast() && !isPrivate(ip) {
-				return ip.String()
-			}
-		}
-	}
-	ip, _, _ := net.SplitHostPort(r.RemoteAddr)
-	return ip
-}

listener.go

@@ -1,19 +1,15 @@
 package khatru
 
 import (
-	"context"
-	"fmt"
-
 	"github.com/nbd-wtf/go-nostr"
-	"github.com/puzpuzpuz/xsync/v3"
+	"github.com/puzpuzpuz/xsync/v2"
 )
 
 type Listener struct {
 	filters nostr.Filters
-	cancel  context.CancelCauseFunc
 }
 
-var listeners = xsync.NewMapOf[*WebSocket, *xsync.MapOf[string, *Listener]]()
+var listeners = xsync.NewTypedMapOf[*WebSocket, *xsync.MapOf[string, *Listener]](pointerHasher[WebSocket])
 
 func GetListeningFilters() nostr.Filters {
 	respfilters := make(nostr.Filters, 0, listeners.Size()*2)
@@ -47,28 +43,24 @@ func GetListeningFilters() nostr.Filters {
 	return respfilters
 }
 
-func setListener(id string, ws *WebSocket, filters nostr.Filters, cancel context.CancelCauseFunc) {
+func setListener(id string, ws *WebSocket, filters nostr.Filters) {
 	subs, _ := listeners.LoadOrCompute(ws, func() *xsync.MapOf[string, *Listener] {
-		return xsync.NewMapOf[string, *Listener]()
+		return xsync.NewMapOf[*Listener]()
 	})
-	subs.Store(id, &Listener{filters: filters, cancel: cancel})
+	subs.Store(id, &Listener{filters: filters})
 }
 
-// remove a specific subscription id from listeners for a given ws client
-// and cancel its specific context
+// Remove a specific subscription id from listeners for a given ws client
 func removeListenerId(ws *WebSocket, id string) {
 	if subs, ok := listeners.Load(ws); ok {
-		if listener, ok := subs.LoadAndDelete(id); ok {
-			listener.cancel(fmt.Errorf("subscription closed by client"))
-		}
+		subs.Delete(id)
 		if subs.Size() == 0 {
 			listeners.Delete(ws)
 		}
 	}
 }
 
-// remove WebSocket conn from listeners
-// (no need to cancel contexts as they are all inherited from the main connection context)
+// Remove WebSocket conn from listeners
 func removeListener(ws *WebSocket) {
 	listeners.Delete(ws)
 }

nip11.go

@@ -1,25 +0,0 @@
-package khatru
-
-import (
-	"encoding/json"
-	"net/http"
-)
-
-func (rl *Relay) HandleNIP11(w http.ResponseWriter, r *http.Request) {
-	w.Header().Set("Content-Type", "application/nostr+json")
-
-	info := *rl.Info
-
-	if len(rl.DeleteEvent) > 0 {
-		info.SupportedNIPs = append(info.SupportedNIPs, 9)
-	}
-	if len(rl.CountEvents) > 0 {
-		info.SupportedNIPs = append(info.SupportedNIPs, 45)
-	}
-
-	for _, ovw := range rl.OverwriteRelayInformation {
-		info = ovw(r.Context(), r, info)
-	}
-
-	json.NewEncoder(w).Encode(info)
-}

nip86.go

@@ -1,267 +0,0 @@
-package khatru
-
-import (
-	"context"
-	"crypto/sha256"
-	"encoding/base64"
-	"encoding/hex"
-	"encoding/json"
-	"fmt"
-	"io"
-	"net"
-	"net/http"
-	"reflect"
-	"strings"
-
-	"github.com/nbd-wtf/go-nostr"
-	"github.com/nbd-wtf/go-nostr/nip86"
-)
-
-type RelayManagementAPI struct {
-	RejectAPICall []func(ctx context.Context, mp nip86.MethodParams) (reject bool, msg string)
-
-	BanPubKey                   func(ctx context.Context, pubkey string, reason string) error
-	ListBannedPubKeys           func(ctx context.Context) ([]nip86.PubKeyReason, error)
-	AllowPubKey                 func(ctx context.Context, pubkey string, reason string) error
-	ListAllowedPubKeys          func(ctx context.Context) ([]nip86.PubKeyReason, error)
-	ListEventsNeedingModeration func(ctx context.Context) ([]nip86.IDReason, error)
-	AllowEvent                  func(ctx context.Context, id string, reason string) error
-	BanEvent                    func(ctx context.Context, id string, reason string) error
-	ListBannedEvents            func(ctx context.Context) ([]nip86.IDReason, error)
-	ChangeRelayName             func(ctx context.Context, name string) error
-	ChangeRelayDescription      func(ctx context.Context, desc string) error
-	ChangeRelayIcon             func(ctx context.Context, icon string) error
-	AllowKind                   func(ctx context.Context, kind int) error
-	DisallowKind                func(ctx context.Context, kind int) error
-	ListAllowedKinds            func(ctx context.Context) ([]int, error)
-	BlockIP                     func(ctx context.Context, ip net.IP, reason string) error
-	UnblockIP                   func(ctx context.Context, ip net.IP, reason string) error
-	ListBlockedIPs              func(ctx context.Context) ([]nip86.IPReason, error)
-}
-
-func (rl *Relay) HandleNIP86(w http.ResponseWriter, r *http.Request) {
-	w.Header().Set("Content-Type", "application/nostr+json+rpc")
-
-	var (
-		resp        nip86.Response
-		ctx         = r.Context()
-		req         nip86.Request
-		mp          nip86.MethodParams
-		evt         nostr.Event
-		payloadHash [32]byte
-	)
-
-	payload, err := io.ReadAll(r.Body)
-	if err != nil {
-		resp.Error = "empty request"
-		goto respond
-	}
-	payloadHash = sha256.Sum256(payload)
-
-	{
-		auth := r.Header.Get("Authorization")
-		spl := strings.Split(auth, "Nostr ")
-		if len(spl) != 2 {
-			resp.Error = "missing auth"
-			goto respond
-		}
-		if evtj, err := base64.StdEncoding.DecodeString(spl[1]); err != nil {
-			resp.Error = "invalid base64 auth"
-			goto respond
-		} else if err := json.Unmarshal(evtj, &evt); err != nil {
-			resp.Error = "invalid auth event json"
-			goto respond
-		} else if ok, _ := evt.CheckSignature(); !ok {
-			resp.Error = "invalid auth event"
-			goto respond
-		} else if pht := evt.Tags.GetFirst([]string{"payload", hex.EncodeToString(payloadHash[:])}); pht == nil {
-			resp.Error = "invalid auth event payload hash"
-			goto respond
-		} else if evt.CreatedAt < nostr.Now()-30 {
-			resp.Error = "auth event is too old"
-			goto respond
-		}
-	}
-
-	if err := json.Unmarshal(payload, &req); err != nil {
-		resp.Error = "invalid json body"
-		goto respond
-	}
-
-	mp, err = nip86.DecodeRequest(req)
-	if err != nil {
-		resp.Error = fmt.Sprintf("invalid params: %s", err)
-		goto respond
-	}
-
-	ctx = context.WithValue(ctx, nip86HeaderAuthKey, evt.PubKey)
-	for _, rac := range rl.ManagementAPI.RejectAPICall {
-		if reject, msg := rac(ctx, mp); reject {
-			resp.Error = msg
-			goto respond
-		}
-	}
-
-	if _, ok := mp.(nip86.SupportedMethods); ok {
-		mat := reflect.TypeOf(rl.ManagementAPI)
-		mav := reflect.ValueOf(rl.ManagementAPI)
-
-		methods := make([]string, 0, mat.NumField())
-		for i := 0; i < mat.NumField(); i++ {
-			field := mat.Field(i)
-
-			// danger: this assumes the struct fields are appropriately named
-			methodName := strings.ToLower(field.Name)
-
-			// assign this only if the function was defined
-			if mav.Field(i).Interface() != nil {
-				methods[i] = methodName
-			}
-		}
-		resp.Result = methods
-	} else {
-		switch thing := mp.(type) {
-		case nip86.BanPubKey:
-			if rl.ManagementAPI.BanPubKey == nil {
-				resp.Error = fmt.Sprintf("method %s not supported", thing.MethodName())
-			} else if err := rl.ManagementAPI.BanPubKey(ctx, thing.PubKey, thing.Reason); err != nil {
-				resp.Error = err.Error()
-			} else {
-				resp.Result = true
-			}
-		case nip86.ListBannedPubKeys:
-			if rl.ManagementAPI.ListBannedPubKeys == nil {
-				resp.Error = fmt.Sprintf("method %s not supported", thing.MethodName())
-			} else if result, err := rl.ManagementAPI.ListBannedPubKeys(ctx); err != nil {
-				resp.Error = err.Error()
-			} else {
-				resp.Result = result
-			}
-		case nip86.AllowPubKey:
-			if rl.ManagementAPI.AllowPubKey == nil {
-				resp.Error = fmt.Sprintf("method %s not supported", thing.MethodName())
-			} else if err := rl.ManagementAPI.AllowPubKey(ctx, thing.PubKey, thing.Reason); err != nil {
-				resp.Error = err.Error()
-			} else {
-				resp.Result = true
-			}
-		case nip86.ListAllowedPubKeys:
-			if rl.ManagementAPI.ListAllowedPubKeys == nil {
-				resp.Error = fmt.Sprintf("method %s not supported", thing.MethodName())
-			} else if result, err := rl.ManagementAPI.ListAllowedPubKeys(ctx); err != nil {
-				resp.Error = err.Error()
-			} else {
-				resp.Result = result
-			}
-		case nip86.BanEvent:
-			if rl.ManagementAPI.BanEvent == nil {
-				resp.Error = fmt.Sprintf("method %s not supported", thing.MethodName())
-			} else if err := rl.ManagementAPI.BanEvent(ctx, thing.ID, thing.Reason); err != nil {
-				resp.Error = err.Error()
-			} else {
-				resp.Result = true
-			}
-		case nip86.AllowEvent:
-			if rl.ManagementAPI.AllowEvent == nil {
-				resp.Error = fmt.Sprintf("method %s not supported", thing.MethodName())
-			} else if err := rl.ManagementAPI.AllowEvent(ctx, thing.ID, thing.Reason); err != nil {
-				resp.Error = err.Error()
-			} else {
-				resp.Result = true
-			}
-		case nip86.ListEventsNeedingModeration:
-			if rl.ManagementAPI.ListEventsNeedingModeration == nil {
-				resp.Error = fmt.Sprintf("method %s not supported", thing.MethodName())
-			} else if result, err := rl.ManagementAPI.ListEventsNeedingModeration(ctx); err != nil {
-				resp.Error = err.Error()
-			} else {
-				resp.Result = result
-			}
-		case nip86.ListBannedEvents:
-			if rl.ManagementAPI.ListBannedEvents == nil {
-				resp.Error = fmt.Sprintf("method %s not supported", thing.MethodName())
-			} else if result, err := rl.ManagementAPI.ListEventsNeedingModeration(ctx); err != nil {
-				resp.Error = err.Error()
-			} else {
-				resp.Result = result
-			}
-		case nip86.ChangeRelayName:
-			if rl.ManagementAPI.ChangeRelayName == nil {
-				resp.Error = fmt.Sprintf("method %s not supported", thing.MethodName())
-			} else if err := rl.ManagementAPI.ChangeRelayName(ctx, thing.Name); err != nil {
-				resp.Error = err.Error()
-			} else {
-				resp.Result = true
-			}
-		case nip86.ChangeRelayDescription:
-			if rl.ManagementAPI.ChangeRelayDescription == nil {
-				resp.Error = fmt.Sprintf("method %s not supported", thing.MethodName())
-			} else if err := rl.ManagementAPI.ChangeRelayDescription(ctx, thing.Description); err != nil {
-				resp.Error = err.Error()
-			} else {
-				resp.Result = true
-			}
-		case nip86.ChangeRelayIcon:
-			if rl.ManagementAPI.ChangeRelayIcon == nil {
-				resp.Error = fmt.Sprintf("method %s not supported", thing.MethodName())
-			} else if err := rl.ManagementAPI.ChangeRelayIcon(ctx, thing.IconURL); err != nil {
-				resp.Error = err.Error()
-			} else {
-				resp.Result = true
-			}
-		case nip86.AllowKind:
-			if rl.ManagementAPI.AllowKind == nil {
-				resp.Error = fmt.Sprintf("method %s not supported", thing.MethodName())
-			} else if err := rl.ManagementAPI.AllowKind(ctx, thing.Kind); err != nil {
-				resp.Error = err.Error()
-			} else {
-				resp.Result = true
-			}
-		case nip86.DisallowKind:
-			if rl.ManagementAPI.DisallowKind == nil {
-				resp.Error = fmt.Sprintf("method %s not supported", thing.MethodName())
-			} else if err := rl.ManagementAPI.DisallowKind(ctx, thing.Kind); err != nil {
-				resp.Error = err.Error()
-			} else {
-				resp.Result = true
-			}
-		case nip86.ListAllowedKinds:
-			if rl.ManagementAPI.ListAllowedKinds == nil {
-				resp.Error = fmt.Sprintf("method %s not supported", thing.MethodName())
-			} else if result, err := rl.ManagementAPI.ListAllowedKinds(ctx); err != nil {
-				resp.Error = err.Error()
-			} else {
-				resp.Result = result
-			}
-		case nip86.BlockIP:
-			if rl.ManagementAPI.BlockIP == nil {
-				resp.Error = fmt.Sprintf("method %s not supported", thing.MethodName())
-			} else if err := rl.ManagementAPI.BlockIP(ctx, thing.IP, thing.Reason); err != nil {
-				resp.Error = err.Error()
-			} else {
-				resp.Result = true
-			}
-		case nip86.UnblockIP:
-			if rl.ManagementAPI.UnblockIP == nil {
-				resp.Error = fmt.Sprintf("method %s not supported", thing.MethodName())
-			} else if err := rl.ManagementAPI.UnblockIP(ctx, thing.IP, thing.Reason); err != nil {
-				resp.Error = err.Error()
-			} else {
-				resp.Result = true
-			}
-		case nip86.ListBlockedIPs:
-			if rl.ManagementAPI.ListBlockedIPs == nil {
-				resp.Error = fmt.Sprintf("method %s not supported", thing.MethodName())
-			} else if result, err := rl.ManagementAPI.ListBlockedIPs(ctx); err != nil {
-				resp.Error = err.Error()
-			} else {
-				resp.Result = result
-			}
-		default:
-			resp.Error = fmt.Sprintf("method '%s' not known", mp.MethodName())
-		}
-	}
-
-respond:
-	json.NewEncoder(w).Encode(resp)
-}

plugins/events.go

@@ -1,12 +1,10 @@
-package policies
+package plugins
 
 import (
 	"context"
-	"fmt"
-	"slices"
-	"strings"
 
 	"github.com/nbd-wtf/go-nostr"
+	"golang.org/x/exp/slices"
 )
 
 // PreventTooManyIndexableTags returns a function that can be used as a RejectFilter that will reject
@@ -15,9 +13,6 @@ import (
 // If ignoreKinds is given this restriction will not apply to these kinds (useful for allowing a bigger).
 // If onlyKinds is given then all other kinds will be ignored.
 func PreventTooManyIndexableTags(max int, ignoreKinds []int, onlyKinds []int) func(context.Context, *nostr.Event) (bool, string) {
-	slices.Sort(ignoreKinds)
-	slices.Sort(onlyKinds)
-
 	ignore := func(kind int) bool { return false }
 	if len(ignoreKinds) > 0 {
 		ignore = func(kind int) bool {
@@ -67,15 +62,34 @@ func PreventLargeTags(maxTagValueLen int) func(context.Context, *nostr.Event) (b
 // RestrictToSpecifiedKinds returns a function that can be used as a RejectFilter that will reject
 // any events with kinds different than the specified ones.
 func RestrictToSpecifiedKinds(kinds ...uint16) func(context.Context, *nostr.Event) (bool, string) {
-	// sort the kinds in increasing order
-	slices.Sort(kinds)
+	max := 0
+	min := 0
+	allowed := make(map[uint16]struct{}, len(kinds))
+	for _, kind := range kinds {
+		allowed[kind] = struct{}{}
+		if int(kind) > max {
+			max = int(kind)
+		}
+		if int(kind) < min {
+			min = int(kind)
+		}
+	}
 
 	return func(ctx context.Context, event *nostr.Event) (reject bool, msg string) {
-		if _, allowed := slices.BinarySearch(kinds, uint16(event.Kind)); allowed {
-			return false, ""
+		// these are cheap and very questionable optimizations, but they exist for a reason:
+		// we would have to ensure that the kind number is within the bounds of a uint16 anyway
+		if event.Kind > max {
+			return true, "event kind not allowed"
+		}
+		if event.Kind < min {
+			return true, "event kind not allowed"
 		}
 
-		return true, fmt.Sprintf("received event kind %d not allowed", event.Kind)
+		// hopefully this map of uint16s is very fast
+		if _, allowed := allowed[uint16(event.Kind)]; allowed {
+			return false, ""
+		}
+		return true, "event kind not allowed"
 	}
 }
 
@@ -96,7 +110,3 @@ func PreventTimestampsInTheFuture(thresholdSeconds nostr.Timestamp) func(context
 		return false, ""
 	}
 }
-
-func RejectEventsWithBase64Media(ctx context.Context, evt *nostr.Event) (bool, string) {
-	return strings.Contains(evt.Content, "data:image/") || strings.Contains(evt.Content, "data:video/"), "event with base64 media"
-}

plugins/filters.go

@@ -1,13 +1,12 @@
-package policies
+package plugins
 
 import (
 	"context"
-	"slices"
 
 	"github.com/nbd-wtf/go-nostr"
+	"golang.org/x/exp/slices"
 )
 
-// NoComplexFilters disallows filters with more than 2 tags.
 func NoComplexFilters(ctx context.Context, filter nostr.Filter) (reject bool, msg string) {
 	items := len(filter.Tags) + len(filter.Kinds)
 
@@ -18,7 +17,6 @@ func NoComplexFilters(ctx context.Context, filter nostr.Filter) (reject bool, ms
 	return false, ""
 }
 
-// NoEmptyFilters disallows filters that don't have at least a tag, a kind, an author or an id.
 func NoEmptyFilters(ctx context.Context, filter nostr.Filter) (reject bool, msg string) {
 	c := len(filter.Kinds) + len(filter.IDs) + len(filter.Authors)
 	for _, tagItems := range filter.Tags {
@@ -30,13 +28,6 @@ func NoEmptyFilters(ctx context.Context, filter nostr.Filter) (reject bool, msg
 	return false, ""
 }
 
-// AntiSyncBots tries to prevent people from syncing kind:1s from this relay to else by always
-// requiring an author parameter at least.
-func AntiSyncBots(ctx context.Context, filter nostr.Filter) (reject bool, msg string) {
-	return (len(filter.Kinds) == 0 || slices.Contains(filter.Kinds, 1)) &&
-		len(filter.Authors) == 0, "an author must be specified to get their kind:1 notes"
-}
-
 func NoSearchQueries(ctx context.Context, filter nostr.Filter) (reject bool, msg string) {
 	if filter.Search != "" {
 		return true, "search is not supported"
@@ -45,10 +36,7 @@ func NoSearchQueries(ctx context.Context, filter nostr.Filter) (reject bool, msg
 }
 
 func RemoveSearchQueries(ctx context.Context, filter *nostr.Filter) {
-	if filter.Search != "" {
-		filter.Search = ""
-		filter.LimitZero = true // signals that this query should be just skipped
-	}
+	filter.Search = ""
 }
 
 func RemoveAllButKinds(kinds ...uint16) func(context.Context, *nostr.Filter) {
@@ -61,23 +49,15 @@ func RemoveAllButKinds(kinds ...uint16) func(context.Context, *nostr.Filter) {
 				}
 			}
 			filter.Kinds = newKinds
-			if len(filter.Kinds) == 0 {
-				filter.LimitZero = true // signals that this query should be just skipped
-			}
 		}
 	}
 }
 
 func RemoveAllButTags(tagNames ...string) func(context.Context, *nostr.Filter) {
 	return func(ctx context.Context, filter *nostr.Filter) {
-		if n := len(filter.Tags); n > 0 {
-			for tagName := range filter.Tags {
-				if !slices.Contains(tagNames, tagName) {
-					delete(filter.Tags, tagName)
-				}
-			}
-			if len(filter.Tags) == 0 {
-				filter.LimitZero = true // signals that this query should be just skipped
+		for tagName := range filter.Tags {
+			if !slices.Contains(tagNames, tagName) {
+				delete(filter.Tags, tagName)
 			}
 		}
 	}

plugins/nip04.go

@@ -1,16 +1,14 @@
-package policies
+package plugins
 
 import (
 	"context"
 
-	"slices"
-
 	"github.com/fiatjaf/khatru"
 	"github.com/nbd-wtf/go-nostr"
+	"golang.org/x/exp/slices"
 )
 
-// RejectKind04Snoopers prevents reading NIP-04 messages from people not involved in the conversation.
-func RejectKind04Snoopers(ctx context.Context, filter nostr.Filter) (bool, string) {
+func rejectKind04Snoopers(ctx context.Context, filter nostr.Filter) (bool, string) {
 	// prevent kind-4 events from being returned to unauthed users,
 	//   only when authentication is a thing
 	if !slices.Contains(filter.Kinds, 4) {
@@ -21,13 +19,13 @@ func RejectKind04Snoopers(ctx context.Context, filter nostr.Filter) (bool, strin
 	senders := filter.Authors
 	receivers, _ := filter.Tags["p"]
 	switch {
-	case ws.AuthedPublicKey == "":
+	case ws.Authed == "":
 		// not authenticated
 		return true, "restricted: this relay does not serve kind-4 to unauthenticated users, does your client implement NIP-42?"
-	case len(senders) == 1 && len(receivers) < 2 && (senders[0] == ws.AuthedPublicKey):
+	case len(senders) == 1 && len(receivers) < 2 && (senders[0] == ws.Authed):
 		// allowed filter: ws.authed is sole sender (filter specifies one or all receivers)
 		return false, ""
-	case len(receivers) == 1 && len(senders) < 2 && (receivers[0] == ws.AuthedPublicKey):
+	case len(receivers) == 1 && len(senders) < 2 && (receivers[0] == ws.Authed):
 		// allowed filter: ws.authed is sole receiver (filter specifies one or all senders)
 		return false, ""
 	default:

policies/helpers.go

@@ -1,43 +0,0 @@
-package policies
-
-import (
-	"sync/atomic"
-	"time"
-
-	"github.com/puzpuzpuz/xsync/v3"
-)
-
-func startRateLimitSystem[K comparable](
-	tokensPerInterval int,
-	interval time.Duration,
-	maxTokens int,
-) func(key K) (ratelimited bool) {
-	negativeBuckets := xsync.NewMapOf[K, *atomic.Int32]()
-	maxTokensInt32 := int32(maxTokens)
-
-	go func() {
-		for {
-			time.Sleep(interval)
-			negativeBuckets.Range(func(key K, bucket *atomic.Int32) bool {
-				newv := bucket.Add(int32(-tokensPerInterval))
-				if newv <= 0 {
-					negativeBuckets.Delete(key)
-				}
-				return true
-			})
-		}
-	}()
-
-	return func(key K) bool {
-		nb, _ := negativeBuckets.LoadOrStore(key, &atomic.Int32{})
-
-		if nb.Load() < maxTokensInt32 {
-			nb.Add(1)
-			// rate limit not reached yet
-			return false
-		}
-
-		// rate limit reached
-		return true
-	}
-}

policies/kind_validation.go

@@ -1,29 +0,0 @@
-package policies
-
-import (
-	"context"
-	"encoding/json"
-
-	"github.com/nbd-wtf/go-nostr"
-)
-
-func ValidateKind(ctx context.Context, evt *nostr.Event) (bool, string) {
-	switch evt.Kind {
-	case 0:
-		var m struct {
-			Name string `json:"name"`
-		}
-		json.Unmarshal([]byte(evt.Content), &m)
-		if m.Name == "" {
-			return true, "missing json name in kind 0"
-		}
-	case 1:
-		return false, ""
-	case 2:
-		return true, "this kind has been deprecated"
-	}
-
-	// TODO: all other kinds
-
-	return false, ""
-}

policies/ratelimits.go

@@ -1,42 +0,0 @@
-package policies
-
-import (
-	"context"
-	"net/http"
-	"time"
-
-	"github.com/fiatjaf/khatru"
-	"github.com/nbd-wtf/go-nostr"
-)
-
-func EventIPRateLimiter(tokensPerInterval int, interval time.Duration, maxTokens int) func(ctx context.Context, _ *nostr.Event) (reject bool, msg string) {
-	rl := startRateLimitSystem[string](tokensPerInterval, interval, maxTokens)
-
-	return func(ctx context.Context, _ *nostr.Event) (reject bool, msg string) {
-		return rl(khatru.GetIP(ctx)), "rate-limited: slow down, please"
-	}
-}
-
-func EventPubKeyRateLimiter(tokensPerInterval int, interval time.Duration, maxTokens int) func(ctx context.Context, _ *nostr.Event) (reject bool, msg string) {
-	rl := startRateLimitSystem[string](tokensPerInterval, interval, maxTokens)
-
-	return func(ctx context.Context, evt *nostr.Event) (reject bool, msg string) {
-		return rl(evt.PubKey), "rate-limited: slow down, please"
-	}
-}
-
-func ConnectionRateLimiter(tokensPerInterval int, interval time.Duration, maxTokens int) func(r *http.Request) bool {
-	rl := startRateLimitSystem[string](tokensPerInterval, interval, maxTokens)
-
-	return func(r *http.Request) bool {
-		return rl(khatru.GetIPFromRequest(r))
-	}
-}
-
-func FilterIPRateLimiter(tokensPerInterval int, interval time.Duration, maxTokens int) func(ctx context.Context, _ nostr.Filter) (reject bool, msg string) {
-	rl := startRateLimitSystem[string](tokensPerInterval, interval, maxTokens)
-
-	return func(ctx context.Context, _ nostr.Filter) (reject bool, msg string) {
-		return rl(khatru.GetIP(ctx)), "rate-limited: there is a bug in the client, no one should be making so many requests"
-	}
-}

policies/sane_defaults.go

@@ -1,24 +0,0 @@
-package policies
-
-import (
-	"time"
-
-	"github.com/fiatjaf/khatru"
-)
-
-func ApplySaneDefaults(relay *khatru.Relay) {
-	relay.RejectEvent = append(relay.RejectEvent,
-		RejectEventsWithBase64Media,
-		EventIPRateLimiter(2, time.Minute*3, 5),
-	)
-
-	relay.RejectFilter = append(relay.RejectFilter,
-		NoEmptyFilters,
-		NoComplexFilters,
-		FilterIPRateLimiter(20, time.Minute, 100),
-	)
-
-	relay.RejectConnection = append(relay.RejectConnection,
-		ConnectionRateLimiter(1, time.Minute*5, 3),
-	)
-}

relay.go

@@ -10,7 +10,7 @@ import (
 	"github.com/fasthttp/websocket"
 	"github.com/nbd-wtf/go-nostr"
 	"github.com/nbd-wtf/go-nostr/nip11"
-	"github.com/puzpuzpuz/xsync/v3"
+	"github.com/puzpuzpuz/xsync/v2"
 )
 
 func NewRelay() *Relay {
@@ -18,9 +18,8 @@ func NewRelay() *Relay {
 		Log: log.New(os.Stderr, "[khatru-relay] ", log.LstdFlags),
 
 		Info: &nip11.RelayInformationDocument{
-			Software:      "https://github.com/fiatjaf/khatru",
-			Version:       "n/a",
-			SupportedNIPs: []int{1, 11, 42, 70, 86},
+			Software: "https://github.com/fiatjaf/khatru",
+			Version:  "n/a",
 		},
 
 		upgrader: websocket.Upgrader{
@@ -29,7 +28,7 @@ func NewRelay() *Relay {
 			CheckOrigin:     func(r *http.Request) bool { return true },
 		},
 
-		clients:  xsync.NewMapOf[*websocket.Conn, struct{}](),
+		clients:  xsync.NewTypedMapOf[*websocket.Conn, struct{}](pointerHasher[websocket.Conn]),
 		serveMux: &http.ServeMux{},
 
 		WriteWait:      10 * time.Second,
@@ -40,30 +39,24 @@ func NewRelay() *Relay {
 }
 
 type Relay struct {
-	ServiceURL string
+	ServiceURL string // required for nip-42
 
-	RejectEvent               []func(ctx context.Context, event *nostr.Event) (reject bool, msg string)
-	RejectFilter              []func(ctx context.Context, filter nostr.Filter) (reject bool, msg string)
-	RejectCountFilter         []func(ctx context.Context, filter nostr.Filter) (reject bool, msg string)
-	RejectConnection          []func(r *http.Request) bool
-	OverwriteDeletionOutcome  []func(ctx context.Context, target *nostr.Event, deletion *nostr.Event) (acceptDeletion bool, msg string)
-	OverwriteResponseEvent    []func(ctx context.Context, event *nostr.Event)
-	OverwriteFilter           []func(ctx context.Context, filter *nostr.Filter)
-	OverwriteCountFilter      []func(ctx context.Context, filter *nostr.Filter)
-	OverwriteRelayInformation []func(ctx context.Context, r *http.Request, info nip11.RelayInformationDocument) nip11.RelayInformationDocument
-	StoreEvent                []func(ctx context.Context, event *nostr.Event) error
-	DeleteEvent               []func(ctx context.Context, event *nostr.Event) error
-	QueryEvents               []func(ctx context.Context, filter nostr.Filter) (chan *nostr.Event, error)
-	CountEvents               []func(ctx context.Context, filter nostr.Filter) (int64, error)
-	OnConnect                 []func(ctx context.Context)
-	OnDisconnect              []func(ctx context.Context)
-	OnEventSaved              []func(ctx context.Context, event *nostr.Event)
-	OnEphemeralEvent          []func(ctx context.Context, event *nostr.Event)
+	RejectEvent              []func(ctx context.Context, event *nostr.Event) (reject bool, msg string)
+	RejectFilter             []func(ctx context.Context, filter nostr.Filter) (reject bool, msg string)
+	RejectCountFilter        []func(ctx context.Context, filter nostr.Filter) (reject bool, msg string)
+	OverwriteDeletionOutcome []func(ctx context.Context, target *nostr.Event, deletion *nostr.Event) (acceptDeletion bool, msg string)
+	OverwriteResponseEvent   []func(ctx context.Context, event *nostr.Event)
+	OverwriteFilter          []func(ctx context.Context, filter *nostr.Filter)
+	OverwriteCountFilter     []func(ctx context.Context, filter *nostr.Filter)
+	StoreEvent               []func(ctx context.Context, event *nostr.Event) error
+	DeleteEvent              []func(ctx context.Context, event *nostr.Event) error
+	QueryEvents              []func(ctx context.Context, filter nostr.Filter) (chan *nostr.Event, error)
+	CountEvents              []func(ctx context.Context, filter nostr.Filter) (int64, error)
+	OnAuth                   []func(ctx context.Context, pubkey string)
+	OnConnect                []func(ctx context.Context)
+	OnEventSaved             []func(ctx context.Context, event *nostr.Event)
 
-	// setting up handlers here will enable these methods
-	ManagementAPI RelayManagementAPI
-
-	// editing info will affect the NIP-11 responses
+	// editing info will affect
 	Info *nip11.RelayInformationDocument
 
 	// Default logger, as set by NewServer, is a stdlib logger prefixed with "[khatru-relay] ",
@@ -87,3 +80,8 @@ type Relay struct {
 	PingPeriod     time.Duration // Send pings to peer with this period. Must be less than pongWait.
 	MaxMessageSize int64         // Maximum message size allowed from peer.
 }
+
+func (rl *Relay) RequestAuth(ctx context.Context) {
+	ws := GetConnection(ctx)
+	ws.WriteJSON(nostr.AuthEnvelope{Challenge: &ws.Challenge})
+}

serve-req.go

@@ -2,13 +2,12 @@ package khatru
 
 import (
 	"context"
-	"errors"
 	"sync"
 
 	"github.com/nbd-wtf/go-nostr"
 )
 
-func (rl *Relay) handleRequest(ctx context.Context, id string, eose *sync.WaitGroup, ws *WebSocket, filter nostr.Filter) error {
+func (rl *Relay) handleRequest(ctx context.Context, id string, eose *sync.WaitGroup, ws *WebSocket, filter nostr.Filter) {
 	defer eose.Done()
 
 	// overwrite the filter (for example, to eliminate some kinds or
@@ -17,9 +16,8 @@ func (rl *Relay) handleRequest(ctx context.Context, id string, eose *sync.WaitGr
 		ovw(ctx, &filter)
 	}
 
-	if filter.LimitZero {
-		// don't do any queries, just subscribe to future events
-		return nil
+	if filter.Limit < 0 {
+		return
 	}
 
 	// then check if we'll reject this filter (we apply this after overwriting
@@ -28,7 +26,8 @@ func (rl *Relay) handleRequest(ctx context.Context, id string, eose *sync.WaitGr
 	// filter we can just reject it)
 	for _, reject := range rl.RejectFilter {
 		if reject, msg := reject(ctx, filter); reject {
-			return errors.New(nostr.NormalizeOKMessage(msg, "blocked"))
+			ws.WriteJSON(nostr.NoticeEnvelope(msg))
+			return
 		}
 	}
 
@@ -41,9 +40,6 @@ func (rl *Relay) handleRequest(ctx context.Context, id string, eose *sync.WaitGr
 			ws.WriteJSON(nostr.NoticeEnvelope(err.Error()))
 			eose.Done()
 			continue
-		} else if ch == nil {
-			eose.Done()
-			continue
 		}
 
 		go func(ch chan *nostr.Event) {
@@ -56,8 +52,6 @@ func (rl *Relay) handleRequest(ctx context.Context, id string, eose *sync.WaitGr
 			eose.Done()
 		}(ch)
 	}
-
-	return nil
 }
 
 func (rl *Relay) handleCountRequest(ctx context.Context, ws *WebSocket, filter nostr.Filter) int64 {

utils.go

@@ -2,60 +2,37 @@ package khatru
 
 import (
 	"context"
+	"hash/maphash"
+	"regexp"
+	"unsafe"
 
 	"github.com/nbd-wtf/go-nostr"
 )
 
 const (
-	wsKey = iota
-	subscriptionIdKey
-	nip86HeaderAuthKey
+	AUTH_CONTEXT_KEY = iota
+	WS_KEY           = iota
 )
 
-func RequestAuth(ctx context.Context) {
-	ws := GetConnection(ctx)
-	ws.authLock.Lock()
-	if ws.Authed == nil {
-		ws.Authed = make(chan struct{})
-	}
-	ws.authLock.Unlock()
-	ws.WriteJSON(nostr.AuthEnvelope{Challenge: &ws.Challenge})
-}
+var nip20prefixmatcher = regexp.MustCompile(`^\w+: `)
 
 func GetConnection(ctx context.Context) *WebSocket {
-	wsi := ctx.Value(wsKey)
-	if wsi != nil {
-		return wsi.(*WebSocket)
-	}
-	return nil
+	return ctx.Value(WS_KEY).(*WebSocket)
 }
 
 func GetAuthed(ctx context.Context) string {
-	if conn := GetConnection(ctx); conn != nil {
-		return conn.AuthedPublicKey
+	authedPubkey := ctx.Value(AUTH_CONTEXT_KEY)
+	if authedPubkey == nil {
+		return ""
 	}
-	if nip86Auth := ctx.Value(nip86HeaderAuthKey); nip86Auth != nil {
-		return nip86Auth.(string)
-	}
-	return ""
+	return authedPubkey.(string)
 }
 
-func GetIP(ctx context.Context) string {
-	return GetIPFromRequest(GetConnection(ctx).Request)
+func pointerHasher[V any](_ maphash.Seed, k *V) uint64 {
+	return uint64(uintptr(unsafe.Pointer(k)))
 }
 
-func GetSubscriptionID(ctx context.Context) string {
-	return ctx.Value(subscriptionIdKey).(string)
-}
-
-func GetOpenSubscriptions(ctx context.Context) []nostr.Filter {
-	if subs, ok := listeners.Load(GetConnection(ctx)); ok {
-		res := make([]nostr.Filter, 0, listeners.Size()*2)
-		subs.Range(func(_ string, sub *Listener) bool {
-			res = append(res, sub.filters...)
-			return true
-		})
-		return res
-	}
-	return nil
+func isOlder(previous, next *nostr.Event) bool {
+	return previous.CreatedAt < next.CreatedAt ||
+		(previous.CreatedAt == next.CreatedAt && previous.ID > next.ID)
 }

websocket.go

@@ -1,7 +1,6 @@
 package khatru
 
 import (
-	"net/http"
 	"sync"
 
 	"github.com/fasthttp/websocket"
@@ -11,15 +10,10 @@ type WebSocket struct {
 	conn  *websocket.Conn
 	mutex sync.Mutex
 
-	// original request
-	Request *http.Request
-
 	// nip42
-	Challenge       string
-	AuthedPublicKey string
-	Authed          chan struct{}
-
-	authLock sync.Mutex
+	Challenge      string
+	Authed         string
+	WaitingForAuth chan struct{}
 }
 
 func (ws *WebSocket) WriteJSON(any any) error {