update eventstore just so badger and ristretto are the same everywhere, who knows what the package manager will do.

this reverts commit e9c9d0c3a7 because it is not a good idea and probably useless.

README.md

@@ -73,7 +73,7 @@ func main() {
 		policies.ValidateKind,
 
 		// define your own policies
-		policies.PreventLargeTags(80),
+		policies.PreventLargeTags(100),
 		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"

adding.go

@@ -11,6 +11,9 @@ import (
 
 // 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) {
+	ctx, cancel := context.WithCancel(ctx)
+	defer cancel()
+
 	if evt == nil {
 		return false, errors.New("error: event is nil")
 	}

deleting.go

@@ -3,6 +3,8 @@ package khatru
 import (
 	"context"
 	"fmt"
+	"strconv"
+	"strings"
 
 	"github.com/nbd-wtf/go-nostr"
 )
@@ -10,10 +12,35 @@ import (
 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
+		if len(tag) >= 2 {
+			var f nostr.Filter
+
+			switch tag[0] {
+			case "e":
+				f = nostr.Filter{IDs: []string{tag[1]}}
+			case "a":
+				spl := strings.Split(tag[1], ":")
+				if len(spl) != 3 {
+					continue
+				}
+				kind, err := strconv.Atoi(spl[0])
+				if err != nil {
+					continue
+				}
+				author := spl[1]
+				identifier := spl[2]
+				f = nostr.Filter{
+					Kinds:   []int{kind},
+					Authors: []string{author},
+					Tags:    nostr.TagMap{"d": []string{identifier}},
+					Until:   &evt.CreatedAt,
+				}
+			default:
+				continue
+			}
+
 			for _, query := range rl.QueryEvents {
-				ch, err := query(ctx, nostr.Filter{IDs: []string{tag[1]}})
+				ch, err := query(ctx, f)
 				if err != nil {
 					continue
 				}
@@ -24,13 +51,14 @@ func (rl *Relay) handleDeleteRequest(ctx context.Context, evt *nostr.Event) erro
 				// got the event, now check if the user can delete it
 				acceptDeletion := target.PubKey == evt.PubKey
 				var msg string
-				if acceptDeletion == false {
+				if !acceptDeletion {
 					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 {

docs/cookbook/auth.md

@@ -30,7 +30,7 @@ If on `RejectFilter` or `RejectEvent` you prefix the message with `auth-required
 relay.RejectFilter = append(relay.RejectFilter, func(ctx context.Context, filter nostr.Filter) (bool, string) {
 	return true, "auth-required: this query requires you to be authenticated"
 })
-relay.RejectEvent = append(relay.RejectFilter, func(ctx context.Context, event *nostr.Event) (bool, string) {
+relay.RejectEvent = append(relay.RejectEvent, func(ctx context.Context, event *nostr.Event) (bool, string) {
 	return true, "auth-required: publishing this event requires authentication"
 })
 ```
@@ -60,3 +60,26 @@ relay.RejectFilter = append(relay.RejectFilter, func(ctx context.Context, filter
 	}
 })
 ```
+
+## Reacting to a successful authentication
+
+Each `khatru.WebSocket` object has an `.Authed` channel that is closed whenever that connection performs a successful authentication.
+
+You can use that to emulate a listener for these events in case you want to keep track of who is authenticating in real time and not only check it when they request for something.
+
+```go
+	relay.OnConnect = append(relay.OnConnect,
+		khatru.RequestAuth,
+		func(ctx context.Context) {
+			go func(ctx context.Context) {
+				conn := khatru.GetConnection(ctx)
+				select {
+				case <-ctx.Done():
+					fmt.Println("connection closed")
+				case <-conn.Authed:
+					fmt.Println("authenticated as", conn.AuthedPublicKey)
+				}
+			}(ctx)
+		},
+	)
+```

docs/cookbook/eventstore.md

@@ -44,7 +44,7 @@ func main() {
 }
 ```
 
-Other local key-value embedded databases that work the same way are [LMDB](https://pkg.go.dev/github.com/fiatjaf/eventstore/lmdb) and [BoltDB](https://pkg.go.dev/github.com/fiatjaf/eventstore/bolt).
+[LMDB](https://pkg.go.dev/github.com/fiatjaf/eventstore/lmdb) works the same way.
 
 [SQLite](https://pkg.go.dev/github.com/fiatjaf/eventstore/sqlite3) also stores things locally so it only needs a `Path`.
 

docs/getting-started/index.md

@@ -63,7 +63,7 @@ We can also make use of some default policies that come bundled with Khatru:
 ```go
 import "github.com/fiatjaf/khatru" // implied
 
-relay.RejectEvent = append(relay.RejectEvent, policies.PreventLargeTags, policies.PreventTimestampsInThePast(time.Hour * 2), policies.PreventTimestampsInTheFuture(time.Minute * 30))
+relay.RejectEvent = append(relay.RejectEvent, policies.PreventLargeTags(120), policies.PreventTimestampsInThePast(time.Hour * 2), policies.PreventTimestampsInTheFuture(time.Minute * 30))
 ```
 
 There are many other ways to customize the relay behavior. Take a look at the [`Relay` struct docs](https://pkg.go.dev/github.com/fiatjaf/khatru#Relay) for more, or see the [cookbook](/cookbook/).

docs/index.md

@@ -39,3 +39,21 @@ features:
     link: https://pkg.go.dev/github.com/fiatjaf/khatru
     details: That means it is fast and lightweight, you can learn the language in 5 minutes and it builds your relay into a single binary that's easy to ship and deploy.
 ---
+
+## A glimpse of `khatru`'s power
+
+It allows you to create a fully-functional relay in 7 lines of code:
+
+```go
+func main() {
+	relay := khatru.NewRelay()
+	db := badger.BadgerBackend{Path: "/tmp/khatru-badgern-tmp"}
+    db.Init()
+	relay.StoreEvent = append(relay.StoreEvent, db.SaveEvent)
+	relay.QueryEvents = append(relay.QueryEvents, db.QueryEvents)
+	relay.DeleteEvent = append(relay.DeleteEvent, db.DeleteEvent)
+	http.ListenAndServe(":3334", relay)
+}
+```
+
+After that you can customize it in infinite ways. See the links above.

docs/use-cases.md

@@ -10,6 +10,7 @@
 * [song](https://git.fiatjaf.com/song), a personal git server that comes with an embedded relay dedicated to dealing with [NIP-34](https://nips.nostr.com/34) git-related Nostr events
 * [relay29](https://github.com/fiatjaf/relay29), a relay that powers most of the [NIP-29](https://nips.nostr.com/29) Nostr groups ecosystem
 * [fiatjaf.com](https://fiatjaf.com), a personal website that serves the same content as HTML but also as Nostr events.
+* [gm-relay](https://github.com/ptrio42/gm-relay), a relay that only accepts GM notes once a day.
 
 ## Other possible use cases
 

examples/readme-demo/main.go

@@ -58,7 +58,7 @@ func main() {
 		policies.ValidateKind,
 
 		// define your own policies
-		policies.PreventLargeTags(80),
+		policies.PreventLargeTags(100),
 		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"

get-started.go

@@ -53,6 +53,7 @@ func (rl *Relay) Shutdown(ctx context.Context) {
 	defer rl.clientsMutex.Unlock()
 	for ws := range rl.clients {
 		ws.conn.WriteControl(websocket.CloseMessage, nil, time.Now().Add(time.Second))
+		ws.cancel()
 		ws.conn.Close()
 	}
 	clear(rl.clients)

go.mod

@@ -1,28 +1,29 @@
 module github.com/fiatjaf/khatru
 
-go 1.21.4
+go 1.23.1
 
 require (
 	github.com/fasthttp/websocket v1.5.7
-	github.com/fiatjaf/eventstore v0.5.1
-	github.com/nbd-wtf/go-nostr v0.34.5
-	github.com/puzpuzpuz/xsync/v3 v3.0.2
+	github.com/fiatjaf/eventstore v0.12.0
+	github.com/nbd-wtf/go-nostr v0.40.0
+	github.com/puzpuzpuz/xsync/v3 v3.4.0
 	github.com/rs/cors v1.7.0
 	github.com/stretchr/testify v1.9.0
 )
 
 require (
+	fiatjaf.com/lib v0.2.0 // indirect
 	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/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
+	github.com/btcsuite/btcd/btcec/v2 v2.3.4 // indirect
+	github.com/btcsuite/btcd/chaincfg/chainhash v1.1.0 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // 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/badger/v4 v4.2.0 // indirect
-	github.com/dgraph-io/ristretto v0.1.1 // indirect
+	github.com/decred/dcrd/crypto/blake256 v1.1.0 // indirect
+	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.3.0 // indirect
+	github.com/dgraph-io/badger/v4 v4.3.1 // indirect
+	github.com/dgraph-io/ristretto v1.0.0 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/elastic/elastic-transport-go/v8 v8.3.0 // indirect
 	github.com/elastic/go-elasticsearch/v7 v7.17.10 // indirect
@@ -30,31 +31,29 @@ require (
 	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 v1.4.0 // 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/protobuf v1.5.4 // indirect
+	github.com/google/flatbuffers v24.3.25+incompatible // 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 v1.17.10 // 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/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/savsgio/gotils v0.0.0-20230208104028-c358bd845dee // indirect
-	github.com/tidwall/gjson v1.17.0 // indirect
+	github.com/tidwall/gjson v1.17.3 // indirect
 	github.com/tidwall/match v1.1.1 // indirect
 	github.com/tidwall/pretty v1.2.1 // 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
+	golang.org/x/exp v0.0.0-20240909161429-701f63a606c0 // indirect
+	golang.org/x/net v0.30.0 // indirect
+	golang.org/x/sys v0.26.0 // indirect
+	google.golang.org/protobuf v1.35.1 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,4 +1,6 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+fiatjaf.com/lib v0.2.0 h1:TgIJESbbND6GjOgGHxF5jsO6EMjuAxIzZHPo5DXYexs=
+fiatjaf.com/lib v0.2.0/go.mod h1:Ycqq3+mJ9jAWu7XjbQI1cVr+OFgnHn79dQR5oTII47g=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/PowerDNS/lmdb-go v1.9.2 h1:Cmgerh9y3ZKBZGz1irxSShhfmFyRUh+Zdk4cZk7ZJvU=
 github.com/PowerDNS/lmdb-go v1.9.2/go.mod h1:TE0l+EZK8Z1B4dx070ZxkWTlp8RG1mjN0/+FkFRQMtU=
@@ -6,30 +8,28 @@ github.com/andybalholm/brotli v1.0.5 h1:8uQZIdzKmjc/iuPu7O2ioW48L81FgatrcpfFmiq/
 github.com/andybalholm/brotli v1.0.5/go.mod h1:fO7iG3H7G2nSZ7m0zPUDn85XEX2GTukHGRSepvi9Eig=
 github.com/aquasecurity/esquery v0.2.0 h1:9WWXve95TE8hbm3736WB7nS6Owl8UGDeu+0jiyE9ttA=
 github.com/aquasecurity/esquery v0.2.0/go.mod h1:VU+CIFR6C+H142HHZf9RUkp4Eedpo9UrEKeCQHWf9ao=
-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/chaincfg/chainhash v1.0.2 h1:KdUfX2zKommPRa+PD0sWZUyXe9w277ABlgELO7H04IM=
-github.com/btcsuite/btcd/chaincfg/chainhash v1.0.2/go.mod h1:7SFka0XMvUgj3hfZtydOrQY2mwhPclbT2snogU7SQQc=
+github.com/btcsuite/btcd/btcec/v2 v2.3.4 h1:3EJjcN70HCu/mwqlUsGK8GcNVyLVxFDlWurTXGPFfiQ=
+github.com/btcsuite/btcd/btcec/v2 v2.3.4/go.mod h1:zYzJ8etWJQIv1Ogk7OzpWjowwOdXY1W/17j2MW85J04=
+github.com/btcsuite/btcd/chaincfg/chainhash v1.1.0 h1:59Kx4K6lzOW5w6nFlA0v5+lk/6sjybR934QNHSJZPTQ=
+github.com/btcsuite/btcd/chaincfg/chainhash v1.1.0/go.mod h1:7SFka0XMvUgj3hfZtydOrQY2mwhPclbT2snogU7SQQc=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-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/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
+github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 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 v1.0.1 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 v4.2.0 h1:8UrgZ3GkP4i/CLijOJx79Yu+etlyjdBU4sfcs2WYQMs=
-github.com/decred/dcrd/dcrec/secp256k1/v4 v4.2.0/go.mod h1:v57UDF4pDQJcEfFUCRop3lJL149eHGSe9Jvczhzjo/0=
-github.com/dgraph-io/badger/v4 v4.2.0 h1:kJrlajbXXL9DFTNuhhu9yCx7JJa4qpYWxtE8BzuWsEs=
-github.com/dgraph-io/badger/v4 v4.2.0/go.mod h1:qfCqhPoWDFJRx1gp5QwwyGo8xk1lbHUxvK9nK0OGAak=
-github.com/dgraph-io/ristretto v0.1.1 h1:6CWw5tJNgpegArSHpNHJKldNeq03FQCwYvfMVWajOK8=
-github.com/dgraph-io/ristretto v0.1.1/go.mod h1:S1GPSBCYCIhmVNfcth17y2zZtQT6wzkzgwUve0VDWWA=
-github.com/dgryski/go-farm v0.0.0-20190423205320-6a90982ecee2 h1:tdlZCpZ/P9DhczCTSixgIKmwPv6+wP5DGjqLYw5SUiA=
-github.com/dgryski/go-farm v0.0.0-20190423205320-6a90982ecee2/go.mod h1:SqUrOPUnsFjfmXRMNPybcSiG0BgUW2AuFH8PAnS2iTw=
-github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
+github.com/decred/dcrd/crypto/blake256 v1.1.0 h1:zPMNGQCm0g4QTY27fOCorQW7EryeQ/U0x++OzVrdms8=
+github.com/decred/dcrd/crypto/blake256 v1.1.0/go.mod h1:2OfgNZ5wDpcsFmHmCK5gZTPcCXqlm2ArzUIkw9czNJo=
+github.com/decred/dcrd/dcrec/secp256k1/v4 v4.3.0 h1:rpfIENRNNilwHwZeG5+P150SMrnNEcHYvcCuK6dPZSg=
+github.com/decred/dcrd/dcrec/secp256k1/v4 v4.3.0/go.mod h1:v57UDF4pDQJcEfFUCRop3lJL149eHGSe9Jvczhzjo/0=
+github.com/dgraph-io/badger/v4 v4.3.1 h1:7r5wKqmoRpGgSxqa0S/nGdpOpvvzuREGPLSua73C8tw=
+github.com/dgraph-io/badger/v4 v4.3.1/go.mod h1:oObz97DImXpd6O/Dt8BqdKLLTDmEmarAimo72VV5whQ=
+github.com/dgraph-io/ristretto v1.0.0 h1:SYG07bONKMlFDUYu5pEu3DGAh8c2OFNzKm6G9J4Si84=
+github.com/dgraph-io/ristretto v1.0.0/go.mod h1:jTi2FiYEhQ1NsMmA7DeBykizjOuY88NhKBkepyu1jPc=
+github.com/dgryski/go-farm v0.0.0-20200201041132-a6ae2369ad13 h1:fAjc9m62+UWV/WAFKLNi6ZS0675eEUC9y3AlwSbQu1Y=
+github.com/dgryski/go-farm v0.0.0-20200201041132-a6ae2369ad13/go.mod h1:SqUrOPUnsFjfmXRMNPybcSiG0BgUW2AuFH8PAnS2iTw=
 github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
 github.com/elastic/elastic-transport-go/v8 v8.3.0 h1:DJGxovyQLXGr62e9nDMPSxRyWION0Bh6d9eCFBriiHo=
@@ -47,8 +47,8 @@ github.com/fasthttp/websocket v1.5.7 h1:0a6o2OfeATvtGgoMKleURhLT6JqWPg7fYfWnH4KH
 github.com/fasthttp/websocket v1.5.7/go.mod h1:bC4fxSono9czeXHQUVKxsC0sNjbm7lPJR04GDFqClfU=
 github.com/fatih/structs v1.1.0 h1:Q7juDM0QtcnhCpeyLGQKyg4TOIghuNXrkL32pHAUMxo=
 github.com/fatih/structs v1.1.0/go.mod h1:9NiDSp5zOcgEDl+j00MP/WkGVPOlPRLejGD8Ga6PJ7M=
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@@ -56,13 +56,11 @@ github.com/gobwas/httphead v0.1.0 h1:exrUm0f4YX0L7EBwZHuCF4GDp8aJfVeBrlLQrs6NqWU
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@@ -76,22 +74,18 @@ github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:W
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@@ -103,10 +97,10 @@ github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8Hm
 github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
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-github.com/klauspost/compress v1.17.8 h1:YcnTYrq7MikUT7k0Yb5eceMmALQPYBW/Xltxn0NAMnU=
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@@ -117,15 +111,17 @@ github.com/mailru/easyjson v0.7.7/go.mod h1:xzfreul335JAWq5oZzymOObrkdz5UnU4kGfJ
 github.com/mattn/go-sqlite3 v1.14.6/go.mod h1:NyWgC/yNuGj7Q9rpYnZvas74GogHl5/Z4A/KQRfk6bU=
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@@ -133,14 +129,13 @@ github.com/savsgio/gotils v0.0.0-20230208104028-c358bd845dee/go.mod h1:qwtSXrKuJ
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@@ -158,8 +153,8 @@ golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACk
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
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@@ -174,8 +169,8 @@ golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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 golang.org/x/net v0.0.0-20201110031124-69a78807bb2b/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
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-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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@@ -186,10 +181,9 @@ golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5h
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-golang.org/x/sys v0.0.0-20221010170243-090e33056c14/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 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=
+golang.org/x/sys v0.26.0 h1:KHjCJyddX0LoSTb3J+vWpupP9p0oznkqVk/IfjymZbo=
+golang.org/x/sys v0.26.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 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=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
@@ -223,14 +217,11 @@ google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2
 google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
-google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
-google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8=
-google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
+google.golang.org/protobuf v1.35.1 h1:m3LfL6/Ca+fqnjnlqQXNpFPABW1UD7mjh8KO2mKFytA=
+google.golang.org/protobuf v1.35.1/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
-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=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

handlers.go

@@ -3,7 +3,6 @@ package khatru
 import (
 	"context"
 	"crypto/rand"
-	"crypto/sha256"
 	"encoding/hex"
 	"errors"
 	"net/http"
@@ -59,6 +58,7 @@ func (rl *Relay) HandleWebsocket(w http.ResponseWriter, r *http.Request) {
 		Request:   r,
 		Challenge: hex.EncodeToString(challenge),
 	}
+	ws.Context, ws.cancel = context.WithCancel(context.Background())
 
 	rl.clientsMutex.Lock()
 	rl.clients[ws] = make([]listenerSpec, 0, 2)
@@ -78,7 +78,8 @@ func (rl *Relay) HandleWebsocket(w http.ResponseWriter, r *http.Request) {
 
 		ticker.Stop()
 		cancel()
-		conn.Close()
+		ws.cancel()
+		ws.conn.Close()
 
 		rl.removeClientAndListeners(ws)
 	}
@@ -86,10 +87,10 @@ func (rl *Relay) HandleWebsocket(w http.ResponseWriter, r *http.Request) {
 	go func() {
 		defer kill()
 
-		conn.SetReadLimit(rl.MaxMessageSize)
-		conn.SetReadDeadline(time.Now().Add(rl.PongWait))
-		conn.SetPongHandler(func(string) error {
-			conn.SetReadDeadline(time.Now().Add(rl.PongWait))
+		ws.conn.SetReadLimit(rl.MaxMessageSize)
+		ws.conn.SetReadDeadline(time.Now().Add(rl.PongWait))
+		ws.conn.SetPongHandler(func(string) error {
+			ws.conn.SetReadDeadline(time.Now().Add(rl.PongWait))
 			return nil
 		})
 
@@ -98,7 +99,7 @@ func (rl *Relay) HandleWebsocket(w http.ResponseWriter, r *http.Request) {
 		}
 
 		for {
-			typ, message, err := conn.ReadMessage()
+			typ, message, err := ws.conn.ReadMessage()
 			if err != nil {
 				if websocket.IsUnexpectedCloseError(
 					err,
@@ -110,6 +111,7 @@ func (rl *Relay) HandleWebsocket(w http.ResponseWriter, r *http.Request) {
 				) {
 					rl.Log.Printf("unexpected close error from %s: %v\n", r.Header.Get("X-Forwarded-For"), err)
 				}
+				ws.cancel()
 				return
 			}
 
@@ -128,9 +130,7 @@ func (rl *Relay) HandleWebsocket(w http.ResponseWriter, r *http.Request) {
 				switch env := envelope.(type) {
 				case *nostr.EventEnvelope:
 					// check id
-					hash := sha256.Sum256(env.Event.Serialize())
-					id := hex.EncodeToString(hash[:])
-					if id != env.Event.ID {
+					if !env.Event.CheckID() {
 						ws.WriteJSON(nostr.OKEnvelope{EventID: env.Event.ID, OK: false, Reason: "invalid: id is computed incorrectly"})
 						return
 					}
@@ -177,6 +177,7 @@ func (rl *Relay) HandleWebsocket(w http.ResponseWriter, r *http.Request) {
 					var ok bool
 					var writeErr error
 					var skipBroadcast bool
+
 					if env.Event.Kind == 5 {
 						// this always returns "blocked: " whenever it returns an error
 						writeErr = srl.handleDeleteRequest(ctx, &env.Event)

listener.go

@@ -87,7 +87,7 @@ func (rl *Relay) removeListenerId(ws *WebSocket, id string) {
 					// so its .index reflects its new position on srl.listeners
 					movedSpecs := rl.clients[moved.ws]
 					idx := slices.IndexFunc(movedSpecs, func(ls listenerSpec) bool {
-						return ls.index == movedFromIndex
+						return ls.index == movedFromIndex && ls.subrelay == srl
 					})
 					movedSpecs[idx].index = spec.index
 					rl.clients[moved.ws] = movedSpecs

listener_fuzz_test.go

@@ -127,3 +127,62 @@ func FuzzRandomListenerIdRemoving(f *testing.F) {
 		}
 	})
 }
+
+func FuzzRouterListenersPabloCrash(f *testing.F) {
+	f.Add(uint(3), uint(6), uint(2), uint(20))
+	f.Fuzz(func(t *testing.T, totalRelays uint, totalConns uint, subFreq uint, subIterations uint) {
+		totalRelays++
+		totalConns++
+		subFreq++
+		subIterations++
+
+		rl := NewRelay()
+
+		relays := make([]*Relay, int(totalRelays))
+		for i := 0; i < int(totalRelays); i++ {
+			relays[i] = NewRelay()
+		}
+
+		conns := make([]*WebSocket, int(totalConns))
+		for i := 0; i < int(totalConns); i++ {
+			ws := &WebSocket{}
+			conns[i] = ws
+			rl.clients[ws] = make([]listenerSpec, 0, subIterations)
+		}
+
+		f := nostr.Filter{Kinds: []int{1}}
+		cancel := func(cause error) {}
+
+		type wsid struct {
+			ws *WebSocket
+			id string
+		}
+
+		s := 0
+		subs := make([]wsid, 0, subIterations*totalConns*totalRelays)
+		for i, conn := range conns {
+			w := idFromSeqUpper(i)
+			for j := 0; j < int(subIterations); j++ {
+				id := w + ":" + idFromSeqLower(j)
+				for _, rlt := range relays {
+					if s%int(subFreq) == 0 {
+						rl.addListener(conn, id, rlt, f, cancel)
+						subs = append(subs, wsid{conn, id})
+					}
+					s++
+				}
+			}
+		}
+
+		for _, wsid := range subs {
+			rl.removeListenerId(wsid.ws, wsid.id)
+		}
+
+		for _, wsid := range subs {
+			require.Len(t, rl.clients[wsid.ws], 0)
+		}
+		for _, rlt := range relays {
+			require.Len(t, rlt.listeners, 0)
+		}
+	})
+}

policies/events.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"slices"
 	"strings"
+	"time"
 
 	"github.com/nbd-wtf/go-nostr"
 )
@@ -66,11 +67,15 @@ 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) {
+func RestrictToSpecifiedKinds(allowEphemeral bool, kinds ...uint16) func(context.Context, *nostr.Event) (bool, string) {
 	// sort the kinds in increasing order
 	slices.Sort(kinds)
 
 	return func(ctx context.Context, event *nostr.Event) (reject bool, msg string) {
+		if allowEphemeral && event.IsEphemeral() {
+			return false, ""
+		}
+
 		if _, allowed := slices.BinarySearch(kinds, uint16(event.Kind)); allowed {
 			return false, ""
 		}
@@ -79,7 +84,8 @@ func RestrictToSpecifiedKinds(kinds ...uint16) func(context.Context, *nostr.Even
 	}
 }
 
-func PreventTimestampsInThePast(thresholdSeconds nostr.Timestamp) func(context.Context, *nostr.Event) (bool, string) {
+func PreventTimestampsInThePast(threshold time.Duration) func(context.Context, *nostr.Event) (bool, string) {
+	thresholdSeconds := nostr.Timestamp(threshold.Seconds())
 	return func(ctx context.Context, event *nostr.Event) (reject bool, msg string) {
 		if nostr.Now()-event.CreatedAt > thresholdSeconds {
 			return true, "event too old"
@@ -88,7 +94,8 @@ func PreventTimestampsInThePast(thresholdSeconds nostr.Timestamp) func(context.C
 	}
 }
 
-func PreventTimestampsInTheFuture(thresholdSeconds nostr.Timestamp) func(context.Context, *nostr.Event) (bool, string) {
+func PreventTimestampsInTheFuture(threshold time.Duration) func(context.Context, *nostr.Event) (bool, string) {
+	thresholdSeconds := nostr.Timestamp(threshold.Seconds())
 	return func(ctx context.Context, event *nostr.Event) (reject bool, msg string) {
 		if event.CreatedAt-nostr.Now() > thresholdSeconds {
 			return true, "event too much in the future"

policies/helpers.go

@@ -18,13 +18,12 @@ func startRateLimitSystem[K comparable](
 	go func() {
 		for {
 			time.Sleep(interval)
-			negativeBuckets.Range(func(key K, bucket *atomic.Int32) bool {
+			for key, bucket := range negativeBuckets.Range {
 				newv := bucket.Add(int32(-tokensPerInterval))
 				if newv <= 0 {
 					negativeBuckets.Delete(key)
 				}
-				return true
-			})
+			}
 		}
 	}()
 

policies/ratelimits.go

@@ -13,7 +13,11 @@ func EventIPRateLimiter(tokensPerInterval int, interval time.Duration, maxTokens
 	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"
+		ip := khatru.GetIP(ctx)
+		if ip == "" {
+			return false, ""
+		}
+		return rl(ip), "rate-limited: slow down, please"
 	}
 }
 

policies/sane_defaults.go

@@ -13,12 +13,11 @@ func ApplySaneDefaults(relay *khatru.Relay) {
 	)
 
 	relay.RejectFilter = append(relay.RejectFilter,
-		NoEmptyFilters,
 		NoComplexFilters,
 		FilterIPRateLimiter(20, time.Minute, 100),
 	)
 
 	relay.RejectConnection = append(relay.RejectConnection,
-		ConnectionRateLimiter(1, time.Minute*5, 3),
+		ConnectionRateLimiter(1, time.Minute*5, 10),
 	)
 }

utils.go

@@ -41,7 +41,12 @@ func GetAuthed(ctx context.Context) string {
 }
 
 func GetIP(ctx context.Context) string {
-	return GetIPFromRequest(GetConnection(ctx).Request)
+	conn := GetConnection(ctx)
+	if conn == nil {
+		return ""
+	}
+
+	return GetIPFromRequest(conn.Request)
 }
 
 func GetSubscriptionID(ctx context.Context) string {

websocket.go

@@ -1,6 +1,7 @@
 package khatru
 
 import (
+	"context"
 	"net/http"
 	"sync"
 
@@ -14,6 +15,10 @@ type WebSocket struct {
 	// original request
 	Request *http.Request
 
+	// this Context will be canceled whenever the connection is closed from the client side or server-side.
+	Context context.Context
+	cancel  context.CancelFunc
+
 	// nip42
 	Challenge       string
 	AuthedPublicKey string