bring back RequestAuth(ctx), now as a global.

account for the fact that the time.Ticker channel is
not closed when the ticker is stopped.

.github/workflows/test.yml

@@ -0,0 +1,14 @@
+name: test every commit
+on:
+  - push
+  - pull_request
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-go@v3
+        with:
+          go-version-file: ./go.mod
+      - run: go test ./...

README.md

@@ -1 +1,120 @@
-khatru
+# khatru, a relay framework [![docs badge](https://img.shields.io/badge/docs-reference-blue)](https://pkg.go.dev/github.com/fiatjaf/khatru#Relay)
+
+[![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)
+
+Khatru makes it easy to write very very custom relays:
+
+  - custom event or filter acceptance policies
+  - custom `AUTH` handlers
+  - custom storage and pluggable databases
+  - custom webpages and other HTTP handlers
+
+Here's a sample:
+
+```go
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"net/http"
+
+	"github.com/fiatjaf/khatru"
+	"github.com/nbd-wtf/go-nostr"
+)
+
+func main() {
+	// create the relay instance
+	relay := khatru.NewRelay()
+
+	// set up some basic properties (will be returned on the NIP-11 endpoint)
+	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"
+
+	// you must bring your own storage scheme -- if you want to have any
+	store := make(map[string]*nostr.Event, 120)
+
+	// set up the basic relay functions
+	relay.StoreEvent = append(relay.StoreEvent,
+		func(ctx context.Context, event *nostr.Event) error {
+			store[event.ID] = event
+			return nil
+		},
+	)
+	relay.QueryEvents = append(relay.QueryEvents,
+		func(ctx context.Context, filter nostr.Filter) (chan *nostr.Event, error) {
+			ch := make(chan *nostr.Event)
+			go func() {
+				for _, evt := range store {
+					if filter.Matches(evt) {
+						ch <- evt
+					}
+				}
+				close(ch)
+			}()
+			return ch, nil
+		},
+	)
+	relay.DeleteEvent = append(relay.DeleteEvent,
+		func(ctx context.Context, event *nostr.Event) error {
+			delete(store, event.ID)
+			return nil
+		},
+	)
+
+	// there are many other configurable things you can set
+	relay.RejectEvent = append(relay.RejectEvent,
+		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"
+			}
+			return false, "" // anyone else can
+		},
+	)
+	relay.OnConnect = append(relay.OnConnect,
+		func(ctx context.Context) {
+			// request NIP-42 AUTH from everybody
+			khatru.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!
+
+	mux := relay.Router()
+	// set up other http handlers
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("content-type", "text/html")
+		fmt.Fprintf(w, `<b>welcome</b> to my relay!`)
+	})
+
+	// start the server
+	fmt.Println("running on :3334")
+	http.ListenAndServe(":3334", relay)
+}
+```
+
+### But I don't want to write my own database!
+
+Fear no more. Using the https://github.com/fiatjaf/eventstore module you get a bunch of compatible databases out of the box and you can just plug them into your relay. For example, [sqlite](https://pkg.go.dev/github.com/fiatjaf/eventstore/sqlite3):
+
+```go
+	db := sqlite3.SQLite3Backend{DatabaseURL: "/tmp/khatru-sqlite-tmp"}
+	if err := db.Init(); err != nil {
+		panic(err)
+	}
+
+	relay.StoreEvent = append(relay.StoreEvent, db.SaveEvent)
+	relay.QueryEvents = append(relay.QueryEvents, db.QueryEvents)
+	relay.CountEvents = append(relay.CountEvents, db.CountEvents)
+	relay.DeleteEvent = append(relay.DeleteEvent, db.DeleteEvent)
+```

add-event.go

@@ -2,32 +2,28 @@ package khatru
 
 import (
 	"context"
+	"errors"
 	"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")
+		return errors.New("error: event is nil")
 	}
 
-	msg := ""
-	rejecting := false
 	for _, reject := range rl.RejectEvent {
-		rejecting, msg = reject(ctx, evt)
-		if rejecting {
-			break
+		if reject, msg := reject(ctx, evt); reject {
+			if msg == "" {
+				return errors.New("blocked: no reason")
+			} else {
+				return errors.New(nostr.NormalizeOKMessage(msg, "blocked"))
+			}
 		}
 	}
 
-	if rejecting {
-		if msg == "" {
-			msg = "no reason"
-		}
-		return fmt.Errorf(msg)
-	}
-
 	if 20000 <= evt.Kind && evt.Kind < 30000 {
 		// do not store ephemeral events
 	} else {
@@ -38,8 +34,7 @@ func (rl *Relay) AddEvent(ctx context.Context, evt *nostr.Event) error {
 				if err != nil {
 					continue
 				}
-				previous := <-ch
-				if previous != nil {
+				if previous := <-ch; previous != nil && isOlder(previous, evt) {
 					for _, del := range rl.DeleteEvent {
 						del(ctx, previous)
 					}
@@ -54,8 +49,7 @@ func (rl *Relay) AddEvent(ctx context.Context, evt *nostr.Event) error {
 					if err != nil {
 						continue
 					}
-					previous := <-ch
-					if previous != nil {
+					if previous := <-ch; previous != nil && isOlder(previous, evt) {
 						for _, del := range rl.DeleteEvent {
 							del(ctx, previous)
 						}
@@ -68,15 +62,10 @@ func (rl *Relay) AddEvent(ctx context.Context, evt *nostr.Event) error {
 		for _, store := range rl.StoreEvent {
 			if saveErr := store(ctx, evt); saveErr != nil {
 				switch saveErr {
-				case ErrDupEvent:
+				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)
-					}
+					return fmt.Errorf(nostr.NormalizeOKMessage(saveErr.Error(), "error"))
 				}
 			}
 		}
@@ -86,7 +75,11 @@ func (rl *Relay) AddEvent(ctx context.Context, evt *nostr.Event) error {
 		}
 	}
 
+	for _, ovw := range rl.OverwriteResponseEvent {
+		ovw(ctx, evt)
+	}
 	notifyListeners(evt)
+
 	return nil
 }
 

errors.go

@@ -1,5 +0,0 @@
-package khatru
-
-import "fmt"
-
-var ErrDupEvent = fmt.Errorf("duplicate: event already exists")

examples/basic-badger/main.go

@@ -4,14 +4,14 @@ import (
 	"fmt"
 	"net/http"
 
+	"github.com/fiatjaf/eventstore/badger"
 	"github.com/fiatjaf/khatru"
-	"github.com/fiatjaf/khatru/plugins/storage/badgern"
 )
 
 func main() {
 	relay := khatru.NewRelay()
 
-	db := badgern.BadgerBackend{Path: "/tmp/khatru-badgern-tmp"}
+	db := badger.BadgerBackend{Path: "/tmp/khatru-badgern-tmp"}
 	if err := db.Init(); err != nil {
 		panic(err)
 	}

examples/basic-elasticsearch/main.go

@@ -5,7 +5,7 @@ import (
 	"net/http"
 
 	"github.com/fiatjaf/khatru"
-	"github.com/fiatjaf/khatru/plugins/storage/elasticsearch"
+	"github.com/fiatjaf/eventstore/elasticsearch"
 )
 
 func main() {

examples/basic-lmdb/main.go

@@ -5,14 +5,14 @@ import (
 	"net/http"
 	"os"
 
+	"github.com/fiatjaf/eventstore/lmdb"
 	"github.com/fiatjaf/khatru"
-	"github.com/fiatjaf/khatru/plugins/storage/lmdbn"
 )
 
 func main() {
 	relay := khatru.NewRelay()
 
-	db := lmdbn.LMDBBackend{Path: "/tmp/khatru-lmdbn-tmp"}
+	db := lmdb.LMDBBackend{Path: "/tmp/khatru-lmdb-tmp"}
 	os.MkdirAll(db.Path, 0755)
 	if err := db.Init(); err != nil {
 		panic(err)

examples/basic-postgres/main.go

@@ -5,7 +5,7 @@ import (
 	"net/http"
 
 	"github.com/fiatjaf/khatru"
-	"github.com/fiatjaf/khatru/plugins/storage/postgresql"
+	"github.com/fiatjaf/eventstore/postgresql"
 )
 
 func main() {

examples/basic-sqlite3/main.go

@@ -5,7 +5,7 @@ import (
 	"net/http"
 
 	"github.com/fiatjaf/khatru"
-	"github.com/fiatjaf/khatru/plugins/storage/sqlite3"
+	"github.com/fiatjaf/eventstore/sqlite3"
 )
 
 func main() {

examples/exclusive/main.go

@@ -6,16 +6,16 @@ import (
 	"net/http"
 	"os"
 
+	"github.com/fiatjaf/eventstore/lmdb"
 	"github.com/fiatjaf/khatru"
-	"github.com/fiatjaf/khatru/plugins"
-	"github.com/fiatjaf/khatru/plugins/storage/lmdbn"
+	"github.com/fiatjaf/khatru/policies"
 	"github.com/nbd-wtf/go-nostr"
 )
 
 func main() {
 	relay := khatru.NewRelay()
 
-	db := lmdbn.LMDBBackend{Path: "/tmp/exclusive"}
+	db := lmdb.LMDBBackend{Path: "/tmp/exclusive"}
 	os.MkdirAll(db.Path, 0755)
 	if err := db.Init(); err != nil {
 		panic(err)
@@ -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, plugins.PreventTooManyIndexableTags(10))
-	relay.RejectFilter = append(relay.RejectFilter, plugins.NoPrefixFilters, plugins.NoComplexFilters)
+	relay.RejectEvent = append(relay.RejectEvent, policies.PreventTooManyIndexableTags(10, nil, nil))
+	relay.RejectFilter = append(relay.RejectFilter, policies.NoComplexFilters)
 
 	relay.OnEventSaved = append(relay.OnEventSaved, func(ctx context.Context, event *nostr.Event) {
 	})

examples/readme-demo/main.go

@@ -0,0 +1,92 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"net/http"
+
+	"github.com/fiatjaf/khatru"
+	"github.com/nbd-wtf/go-nostr"
+)
+
+func main() {
+	// create the relay instance
+	relay := khatru.NewRelay()
+
+	// set up some basic properties (will be returned on the NIP-11 endpoint)
+	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"
+
+	// you must bring your own storage scheme -- if you want to have any
+	store := make(map[string]*nostr.Event, 120)
+
+	// set up the basic relay functions
+	relay.StoreEvent = append(relay.StoreEvent,
+		func(ctx context.Context, event *nostr.Event) error {
+			store[event.ID] = event
+			return nil
+		},
+	)
+	relay.QueryEvents = append(relay.QueryEvents,
+		func(ctx context.Context, filter nostr.Filter) (chan *nostr.Event, error) {
+			ch := make(chan *nostr.Event)
+			go func() {
+				for _, evt := range store {
+					if filter.Matches(evt) {
+						ch <- evt
+					}
+				}
+				close(ch)
+			}()
+			return ch, nil
+		},
+	)
+	relay.DeleteEvent = append(relay.DeleteEvent,
+		func(ctx context.Context, event *nostr.Event) error {
+			delete(store, event.ID)
+			return nil
+		},
+	)
+
+	// there are many other configurable things you can set
+	relay.RejectEvent = append(relay.RejectEvent,
+		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"
+			}
+			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,
+		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"
+		},
+	)
+	relay.OnAuth = append(relay.OnAuth,
+		func(ctx context.Context, pubkey string) {
+			// and when they auth we can just log that for nothing
+			log.Println(pubkey + " is authed!")
+		},
+	)
+	// check the docs for more goodies!
+
+	mux := relay.Router()
+	// set up other http handlers
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("content-type", "text/html")
+		fmt.Fprintf(w, `<b>welcome</b> to my relay!`)
+	})
+
+	// start the server
+	fmt.Println("running on :3334")
+	http.ListenAndServe(":3334", relay)
+}

go.mod

@@ -1,61 +1,57 @@
 module github.com/fiatjaf/khatru
 
-go 1.20
+go 1.21.0
 
 require (
-	github.com/aquasecurity/esquery v0.2.0
-	github.com/bmatsuo/lmdb-go v1.8.0
-	github.com/dgraph-io/badger/v4 v4.1.0
-	github.com/elastic/go-elasticsearch/v8 v8.6.0
 	github.com/fasthttp/websocket v1.5.3
-	github.com/gobwas/ws v1.2.0
-	github.com/jmoiron/sqlx v1.3.1
-	github.com/lib/pq v1.10.3
-	github.com/mattn/go-sqlite3 v1.14.6
-	github.com/nbd-wtf/go-nostr v0.20.0
+	github.com/fiatjaf/eventstore v0.3.1
+	github.com/nbd-wtf/go-nostr v0.27.1
 	github.com/puzpuzpuz/xsync/v2 v2.5.1
 	github.com/rs/cors v1.7.0
-	github.com/stretchr/testify v1.8.2
-	golang.org/x/exp v0.0.0-20230425010034-47ecfdc1ba53
+	github.com/sebest/xff v0.0.0-20210106013422-671bd2870b3a
+	golang.org/x/exp v0.0.0-20231006140011-7918f672742d
 )
 
 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/btcsuite/btcd/btcec/v2 v2.3.2 // indirect
 	github.com/btcsuite/btcd/chaincfg/chainhash v1.0.2 // indirect
-	github.com/cespare/xxhash/v2 v2.1.2 // indirect
-	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // 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/dustin/go-humanize v1.0.0 // indirect
-	github.com/elastic/elastic-transport-go/v8 v8.0.0-20211216131617-bbee439d559c // indirect
-	github.com/elastic/go-elasticsearch/v7 v7.6.0 // 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
+	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/gogo/protobuf v1.3.2 // indirect
-	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b // indirect
-	github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6 // indirect
-	github.com/golang/protobuf v1.3.1 // indirect
-	github.com/golang/snappy v0.0.3 // indirect
-	github.com/google/flatbuffers v1.12.1 // 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/jmoiron/sqlx v1.3.5 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
-	github.com/klauspost/compress v1.16.5 // indirect
-	github.com/kr/text v0.2.0 // indirect
+	github.com/klauspost/compress v1.17.2 // 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/puzpuzpuz/xsync v1.5.2 // indirect
 	github.com/savsgio/gotils v0.0.0-20230208104028-c358bd845dee // indirect
-	github.com/tidwall/gjson v1.14.4 // indirect
+	github.com/tidwall/gjson v1.17.0 // indirect
 	github.com/tidwall/match v1.1.1 // indirect
-	github.com/tidwall/pretty v1.2.0 // indirect
+	github.com/tidwall/pretty v1.2.1 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // 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
-	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
+	go.opencensus.io v0.24.0 // indirect
+	golang.org/x/net v0.17.0 // indirect
+	golang.org/x/sys v0.14.0 // indirect
+	google.golang.org/protobuf v1.31.0 // indirect
 )

go.sum

@@ -1,20 +1,21 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 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=
 github.com/andybalholm/brotli v1.0.5 h1:8uQZIdzKmjc/iuPu7O2ioW48L81FgatrcpfFmiq/cCs=
 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/bmatsuo/lmdb-go v1.8.0 h1:ohf3Q4xjXZBKh4AayUY4bb2CXuhRAI8BYGlJq08EfNA=
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@@ -143,30 +171,30 @@ golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn
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@@ -177,14 +205,30 @@ golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8T
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+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=
 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=
 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

@@ -6,30 +6,34 @@ import (
 	"crypto/sha256"
 	"encoding/hex"
 	"encoding/json"
+	"errors"
 	"net/http"
+	"strings"
 	"sync"
 	"time"
 
 	"github.com/fasthttp/websocket"
 	"github.com/nbd-wtf/go-nostr"
-	"github.com/nbd-wtf/go-nostr/nip11"
 	"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" {
-		rl.HandleNIP11(w, r)
+		cors.AllowAll().Handler(http.HandlerFunc(rl.HandleNIP11)).ServeHTTP(w, r)
 	} else {
 		rl.serveMux.ServeHTTP(w, r)
 	}
 }
 
 func (rl *Relay) HandleWebsocket(w http.ResponseWriter, r *http.Request) {
-	ctx := r.Context()
-
 	conn, err := rl.upgrader.Upgrade(w, r, nil)
 	if err != nil {
 		rl.Log.Printf("failed to upgrade websocket: %v\n", err)
@@ -43,21 +47,35 @@ func (rl *Relay) HandleWebsocket(w http.ResponseWriter, r *http.Request) {
 	rand.Read(challenge)
 
 	ws := &WebSocket{
-		conn:           conn,
-		Challenge:      hex.EncodeToString(challenge),
-		WaitingForAuth: make(chan struct{}),
+		conn:      conn,
+		Request:   r,
+		Challenge: hex.EncodeToString(challenge),
+		Authed:    make(chan struct{}),
+	}
+
+	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)
+		}
 	}
 
-	// reader
 	go func() {
-		defer func() {
-			ticker.Stop()
-			if _, ok := rl.clients.Load(conn); ok {
-				conn.Close()
-				rl.clients.Delete(conn)
-				removeListener(ws)
-			}
-		}()
+		defer kill()
 
 		conn.SetReadLimit(rl.MaxMessageSize)
 		conn.SetReadDeadline(time.Now().Add(rl.PongWait))
@@ -75,13 +93,14 @@ 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
 				) {
 					rl.Log.Printf("unexpected close error from %s: %v\n", r.Header.Get("X-Forwarded-For"), err)
 				}
-				break
+				return
 			}
 
 			if typ == websocket.PingMessage {
@@ -90,211 +109,124 @@ func (rl *Relay) HandleWebsocket(w http.ResponseWriter, r *http.Request) {
 			}
 
 			go func(message []byte) {
-				ctx = context.Background()
-
-				var request []json.RawMessage
-				if err := json.Unmarshal(message, &request); err != nil {
+				envelope := nostr.ParseMessage(message)
+				if envelope == nil {
 					// stop silently
 					return
 				}
 
-				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()))
+				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"})
 						return
 					}
 
-					// 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 {
-						reason := "error: failed to verify signature"
-						ws.WriteJSON(nostr.OKEnvelope{EventID: evt.ID, OK: false, Reason: &reason})
+					// 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"})
 						return
 					} else if !ok {
-						reason := "invalid: signature is invalid"
-						ws.WriteJSON(nostr.OKEnvelope{EventID: evt.ID, OK: false, Reason: &reason})
+						ws.WriteJSON(nostr.OKEnvelope{EventID: env.Event.ID, OK: false, Reason: "invalid: signature is invalid"})
 						return
 					}
 
 					var ok bool
-					if evt.Kind == 5 {
-						err = rl.handleDeleteRequest(ctx, &evt)
+					var writeErr error
+					if env.Event.Kind == 5 {
+						// this always returns "blocked: " whenever it returns an error
+						writeErr = rl.handleDeleteRequest(ctx, &env.Event)
 					} else {
-						err = rl.AddEvent(ctx, &evt)
+						// this will also always return a prefixed reason
+						writeErr = rl.AddEvent(ctx, &env.Event)
 					}
-					var reason *string
-					if err == nil {
+
+					var reason string
+					if writeErr == nil {
 						ok = true
 					} else {
-						msg := err.Error()
-						reason = &msg
+						reason = writeErr.Error()
+						if strings.HasPrefix(reason, "auth-required:") {
+							RequestAuth(ctx)
+						}
 					}
-					ws.WriteJSON(nostr.OKEnvelope{EventID: evt.ID, OK: ok, Reason: reason})
-				case "COUNT":
+					ws.WriteJSON(nostr.OKEnvelope{EventID: env.Event.ID, OK: ok, Reason: reason})
+				case *nostr.CountEnvelope:
 					if rl.CountEvents == nil {
-						ws.WriteJSON(nostr.NoticeEnvelope("this relay does not support NIP-45"))
+						ws.WriteJSON(nostr.ClosedEnvelope{SubscriptionID: env.SubscriptionID, Reason: "unsupported: this relay does not support NIP-45"})
 						return
 					}
-
-					var id string
-					json.Unmarshal(request[1], &id)
-					if id == "" {
-						ws.WriteJSON(nostr.NoticeEnvelope("COUNT has no <id>"))
-						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
-						}
-
-						filter := filters[i]
-
-						for _, reject := range rl.RejectFilter {
-							if rejecting, msg := reject(ctx, filter); rejecting {
-								ws.WriteJSON(nostr.NoticeEnvelope(msg))
-								continue
-							}
-						}
-						for _, reject := range rl.RejectCountFilter {
-							if rejecting, msg := reject(ctx, filter); rejecting {
-								ws.WriteJSON(nostr.NoticeEnvelope(msg))
-								continue
-							}
-						}
-
-						for _, count := range rl.CountEvents {
-							res, err := count(ctx, filter)
-							if err != nil {
-								ws.WriteJSON(nostr.NoticeEnvelope(err.Error()))
-							}
-							total += res
-						}
+					for _, filter := range env.Filters {
+						total += rl.handleCountRequest(ctx, ws, filter)
 					}
-
-					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)
+					ws.WriteJSON(nostr.CountEnvelope{SubscriptionID: env.SubscriptionID, Count: &total})
+				case *nostr.ReqEnvelope:
 					eose := sync.WaitGroup{}
-					eose.Add(len(request[2:]))
+					eose.Add(len(env.Filters))
 
-					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
-						}
+					// a context just for the "stored events" request handler
+					reqCtx, cancelReqCtx := context.WithCancelCause(ctx)
 
-						filter := filters[i]
+					// expose subscription id in the context
+					reqCtx = context.WithValue(reqCtx, subscriptionIdKey, env.SubscriptionID)
 
-						for _, reject := range rl.RejectCountFilter {
-							if rejecting, msg := reject(ctx, filter); rejecting {
-								ws.WriteJSON(nostr.NoticeEnvelope(msg))
-								eose.Done()
-								continue
+					// 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
 						}
-
-						eose.Add(len(rl.QueryEvents))
-						for _, query := range rl.QueryEvents {
-							ch, err := query(ctx, filter)
-							if err != nil {
-								ws.WriteJSON(nostr.NoticeEnvelope(err.Error()))
-								eose.Done()
-								continue
-							}
-
-							go func(ch chan *nostr.Event) {
-								for event := range ch {
-									ws.WriteJSON(nostr.EventEnvelope{SubscriptionID: &id, Event: *event})
-								}
-								eose.Done()
-							}(ch)
-						}
-
-						eose.Done()
 					}
 
 					go func() {
+						// when all events have been loaded from databases and dispatched
+						// we can cancel the context and fire the EOSE message
 						eose.Wait()
-						ws.WriteJSON(nostr.EOSEEnvelope(id))
+						cancelReqCtx(nil)
+						ws.WriteJSON(nostr.EOSEEnvelope(env.SubscriptionID))
 					}()
 
-					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 {
-							reason := "error: failed to authenticate"
-							ws.WriteJSON(nostr.OKEnvelope{EventID: evt.ID, OK: false, Reason: &reason})
-						}
+					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
+						close(ws.Authed)
+						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 func() {
-			ticker.Stop()
-			conn.Close()
-		}()
+		defer kill()
 
 		for {
 			select {
+			case <-ctx.Done():
+				return
 			case <-ticker.C:
 				err := ws.WriteMessage(websocket.PingMessage, nil)
 				if err != nil {
-					rl.Log.Printf("error writing ping: %v; closing websocket\n", err)
+					if !strings.HasSuffix(err.Error(), "use of closed network connection") {
+						rl.Log.Printf("error writing ping: %v; closing websocket\n", err)
+					}
 					return
 				}
 			}
@@ -303,28 +235,11 @@ 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/json")
+	w.Header().Set("Content-Type", "application/nostr+json")
 
-	supportedNIPs := []int{9, 11, 12, 15, 16, 20, 33}
-	if rl.ServiceURL != "" {
-		supportedNIPs = append(supportedNIPs, 42)
-	}
-	if rl.CountEvents != nil {
-		supportedNIPs = append(supportedNIPs, 45)
-	}
-
-	info := nip11.RelayInformationDocument{
-		Name:          rl.Name,
-		Description:   rl.Description,
-		PubKey:        rl.PubKey,
-		Contact:       rl.Contact,
-		SupportedNIPs: supportedNIPs,
-		Software:      "https://github.com/trailriver/khatru",
-		Version:       "n/a",
-	}
-
-	for _, edit := range rl.EditInformation {
-		edit(r.Context(), &info)
+	info := *rl.Info
+	for _, ovw := range rl.OverwriteRelayInformation {
+		info = ovw(r.Context(), r, info)
 	}
 
 	json.NewEncoder(w).Encode(info)

helpers.go

@@ -0,0 +1,42 @@
+package khatru
+
+import (
+	"hash/maphash"
+	"net/http"
+	"strconv"
+	"strings"
+	"unsafe"
+
+	"github.com/nbd-wtf/go-nostr"
+)
+
+func pointerHasher[V any](_ maphash.Seed, k *V) uint64 {
+	return uint64(uintptr(unsafe.Pointer(k)))
+}
+
+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
+}

listener.go

@@ -1,22 +1,26 @@
 package khatru
 
 import (
+	"context"
+	"fmt"
+
 	"github.com/nbd-wtf/go-nostr"
 	"github.com/puzpuzpuz/xsync/v2"
 )
 
 type Listener struct {
 	filters nostr.Filters
+	cancel  context.CancelCauseFunc
 }
 
-var listeners = xsync.NewTypedMapOf[*WebSocket, map[string]*Listener](pointerHasher[WebSocket])
+var listeners = xsync.NewTypedMapOf[*WebSocket, *xsync.MapOf[string, *Listener]](pointerHasher[WebSocket])
 
 func GetListeningFilters() nostr.Filters {
 	respfilters := make(nostr.Filters, 0, listeners.Size()*2)
 
 	// here we go through all the existing listeners
-	listeners.Range(func(_ *WebSocket, subs map[string]*Listener) bool {
-		for _, listener := range subs {
+	listeners.Range(func(_ *WebSocket, subs *xsync.MapOf[string, *Listener]) bool {
+		subs.Range(func(_ string, listener *Listener) bool {
 			for _, listenerfilter := range listener.filters {
 				for _, respfilter := range respfilters {
 					// check if this filter specifically is already added to respfilters
@@ -32,7 +36,9 @@ func GetListeningFilters() nostr.Filters {
 			nextconn:
 				continue
 			}
-		}
+
+			return true
+		})
 
 		return true
 	})
@@ -41,34 +47,41 @@ func GetListeningFilters() nostr.Filters {
 	return respfilters
 }
 
-func setListener(id string, ws *WebSocket, filters nostr.Filters) {
-	subs, _ := listeners.LoadOrCompute(ws, func() map[string]*Listener { return make(map[string]*Listener) })
-	subs[id] = &Listener{filters: filters}
+func setListener(id string, ws *WebSocket, filters nostr.Filters, cancel context.CancelCauseFunc) {
+	subs, _ := listeners.LoadOrCompute(ws, func() *xsync.MapOf[string, *Listener] {
+		return xsync.NewMapOf[*Listener]()
+	})
+	subs.Store(id, &Listener{filters: filters, cancel: cancel})
 }
 
-// Remove a specific subscription id from listeners for a given ws client
+// remove a specific subscription id from listeners for a given ws client
+// and cancel its specific context
 func removeListenerId(ws *WebSocket, id string) {
 	if subs, ok := listeners.Load(ws); ok {
-		delete(subs, id)
-		if len(subs) == 0 {
+		if listener, ok := subs.LoadAndDelete(id); ok {
+			listener.cancel(fmt.Errorf("subscription closed by client"))
+		}
+		if subs.Size() == 0 {
 			listeners.Delete(ws)
 		}
 	}
 }
 
-// Remove WebSocket conn from listeners
+// remove WebSocket conn from listeners
+// (no need to cancel contexts as they are all inherited from the main connection context)
 func removeListener(ws *WebSocket) {
 	listeners.Delete(ws)
 }
 
 func notifyListeners(event *nostr.Event) {
-	listeners.Range(func(ws *WebSocket, subs map[string]*Listener) bool {
-		for id, listener := range subs {
+	listeners.Range(func(ws *WebSocket, subs *xsync.MapOf[string, *Listener]) bool {
+		subs.Range(func(id string, listener *Listener) bool {
 			if !listener.filters.Match(event) {
-				continue
+				return true
 			}
 			ws.WriteJSON(nostr.EventEnvelope{SubscriptionID: &id, Event: *event})
-		}
+			return true
+		})
 		return true
 	})
 }

plugins/events.go

@@ -1,22 +0,0 @@
-package plugins
-
-import (
-	"context"
-
-	"github.com/nbd-wtf/go-nostr"
-)
-
-func PreventTooManyIndexableTags(max int) func(context.Context, *nostr.Event) (bool, string) {
-	return func(ctx context.Context, event *nostr.Event) (reject bool, msg string) {
-		ntags := 0
-		for _, tag := range event.Tags {
-			if len(tag) > 0 && len(tag[0]) == 1 {
-				ntags++
-			}
-		}
-		if ntags > max {
-			return true, "too many indexable tags"
-		}
-		return false, ""
-	}
-}

plugins/filters.go

@@ -1,33 +0,0 @@
-package plugins
-
-import (
-	"context"
-	"fmt"
-
-	"github.com/nbd-wtf/go-nostr"
-)
-
-func NoPrefixFilters(ctx context.Context, filter nostr.Filter) (reject bool, msg string) {
-	for _, id := range filter.IDs {
-		if len(id) != 64 {
-			return true, fmt.Sprintf("filters can only contain full ids")
-		}
-	}
-	for _, pk := range filter.Authors {
-		if len(pk) != 64 {
-			return true, fmt.Sprintf("filters can only contain full pubkeys")
-		}
-	}
-
-	return false, ""
-}
-
-func NoComplexFilters(ctx context.Context, filter nostr.Filter) (reject bool, msg string) {
-	items := len(filter.Tags) + len(filter.Kinds)
-
-	if items > 4 && len(filter.Tags) > 2 {
-		return true, "too many things to filter for"
-	}
-
-	return false, ""
-}

plugins/storage/badgern/count.go

@@ -1,83 +0,0 @@
-package badgern
-
-import (
-	"context"
-	"encoding/binary"
-
-	"github.com/dgraph-io/badger/v4"
-	"github.com/nbd-wtf/go-nostr"
-	"github.com/nbd-wtf/go-nostr/nson"
-)
-
-func (b BadgerBackend) CountEvents(ctx context.Context, filter nostr.Filter) (int64, error) {
-	var count int64 = 0
-
-	queries, extraFilter, since, prefixLen, idxOffset, err := prepareQueries(filter)
-	if err != nil {
-		return 0, err
-	}
-
-	err = b.View(func(txn *badger.Txn) error {
-		// iterate only through keys and in reverse order
-		opts := badger.DefaultIteratorOptions
-		opts.PrefetchValues = false
-		opts.Reverse = true
-
-		// actually iterate
-		for _, q := range queries {
-			it := txn.NewIterator(opts)
-			defer it.Close()
-
-			for it.Seek(q.startingPoint); it.ValidForPrefix(q.prefix); it.Next() {
-				item := it.Item()
-				key := item.Key()
-
-				if !q.skipTimestamp {
-					createdAt := binary.BigEndian.Uint32(key[prefixLen:idxOffset])
-					if createdAt < since {
-						break
-					}
-				}
-
-				idx := make([]byte, 5)
-				idx[0] = rawEventStorePrefix
-				copy(idx[1:], key[idxOffset:])
-
-				// fetch actual event
-				item, err := txn.Get(idx)
-				if err != nil {
-					if err == badger.ErrDiscardedTxn {
-						return err
-					}
-
-					panic(err)
-				}
-
-				if extraFilter == nil {
-					count++
-				} else {
-					err = item.Value(func(val []byte) error {
-						evt := &nostr.Event{}
-						if err := nson.Unmarshal(string(val), evt); err != nil {
-							return err
-						}
-
-						// check if this matches the other filters that were not part of the index
-						if extraFilter == nil || extraFilter.Matches(evt) {
-							count++
-						}
-
-						return nil
-					})
-					if err != nil {
-						panic(err)
-					}
-				}
-			}
-		}
-
-		return nil
-	})
-
-	return count, err
-}

plugins/storage/badgern/delete.go

@@ -1,78 +0,0 @@
-package badgern
-
-import (
-	"context"
-	"encoding/hex"
-
-	"github.com/dgraph-io/badger/v4"
-	"github.com/nbd-wtf/go-nostr"
-	"github.com/nbd-wtf/go-nostr/nson"
-)
-
-func (b *BadgerBackend) DeleteEvent(ctx context.Context, evt *nostr.Event) error {
-	deletionHappened := false
-
-	err := b.Update(func(txn *badger.Txn) error {
-		idx := make([]byte, 1, 5)
-		idx[0] = rawEventStorePrefix
-
-		// query event by id to get its idx
-		id, _ := hex.DecodeString(evt.ID)
-		prefix := make([]byte, 1+32)
-		copy(prefix[1:], id)
-		opts := badger.DefaultIteratorOptions
-		opts.PrefetchValues = false
-		it := txn.NewIterator(opts)
-		it.Seek(prefix)
-		if it.ValidForPrefix(prefix) {
-			// the key is the last 32 bytes
-			idx = append(idx, it.Item().Key()[1+32:]...)
-		}
-		it.Close()
-
-		// if no idx was found, end here, this event doesn't exist
-		if len(idx) == 1 {
-			return nil
-		}
-
-		// fetch the event
-		item, err := txn.Get(idx)
-		if err != nil {
-			return err
-		}
-
-		item.Value(func(val []byte) error {
-			evt := &nostr.Event{}
-			if err := nson.Unmarshal(string(val), evt); err != nil {
-				return err
-			}
-
-			// set this so we'll run the GC later
-			deletionHappened = true
-
-			// calculate all index keys we have for this event and delete them
-			for _, k := range getIndexKeysForEvent(evt, idx[1:]) {
-				if err := txn.Delete(k); err != nil {
-					return err
-				}
-			}
-
-			// delete the raw event
-			return txn.Delete(idx)
-		})
-
-		return nil
-	})
-	if err != nil {
-		return err
-	}
-
-	// after deleting, run garbage collector
-	if deletionHappened {
-		if err := b.RunValueLogGC(0.8); err != nil {
-			panic(err)
-		}
-	}
-
-	return nil
-}

plugins/storage/badgern/lib.go

@@ -1,159 +0,0 @@
-package badgern
-
-import (
-	"encoding/binary"
-	"encoding/hex"
-
-	"github.com/dgraph-io/badger/v4"
-	"github.com/nbd-wtf/go-nostr"
-)
-
-const (
-	rawEventStorePrefix   byte = 0
-	indexCreatedAtPrefix  byte = 1
-	indexIdPrefix         byte = 2
-	indexKindPrefix       byte = 3
-	indexPubkeyPrefix     byte = 4
-	indexPubkeyKindPrefix byte = 5
-	indexTagPrefix        byte = 6
-)
-
-type BadgerBackend struct {
-	Path     string
-	MaxLimit int
-
-	*badger.DB
-	seq *badger.Sequence
-}
-
-func (b *BadgerBackend) Init() error {
-	db, err := badger.Open(badger.DefaultOptions(b.Path))
-	if err != nil {
-		return err
-	}
-	b.DB = db
-	b.seq, err = db.GetSequence([]byte("events"), 1000)
-	if err != nil {
-		return err
-	}
-
-	if b.MaxLimit == 0 {
-		b.MaxLimit = 500
-	}
-
-	// DEBUG: inspecting keys on startup
-	// db.View(func(txn *badger.Txn) error {
-	// 	opts := badger.DefaultIteratorOptions
-	// 	opts.PrefetchSize = 10
-	// 	it := txn.NewIterator(opts)
-	// 	defer it.Close()
-	// 	for it.Rewind(); it.Valid(); it.Next() {
-	// 		item := it.Item()
-	// 		k := item.Key()
-	// 		err := item.Value(func(v []byte) error {
-	// 			fmt.Println("key:", k)
-	// 			return nil
-	// 		})
-	// 		if err != nil {
-	// 			return err
-	// 		}
-	// 	}
-	// 	return nil
-	// })
-
-	return nil
-}
-
-func (b BadgerBackend) Close() {
-	b.DB.Close()
-	b.seq.Release()
-}
-
-func (b BadgerBackend) Serial() []byte {
-	v, _ := b.seq.Next()
-	vb := make([]byte, 5)
-	vb[0] = rawEventStorePrefix
-	binary.BigEndian.PutUint32(vb[1:], uint32(v))
-	return vb
-}
-
-func getIndexKeysForEvent(evt *nostr.Event, idx []byte) [][]byte {
-	keys := make([][]byte, 0, 18)
-
-	// indexes
-	{
-		// ~ by id
-		id, _ := hex.DecodeString(evt.ID)
-		k := make([]byte, 1+32+4)
-		k[0] = indexIdPrefix
-		copy(k[1:], id)
-		copy(k[1+32:], idx)
-		keys = append(keys, k)
-	}
-
-	{
-		// ~ by pubkey+date
-		pubkey, _ := hex.DecodeString(evt.PubKey)
-		k := make([]byte, 1+32+4+4)
-		k[0] = indexPubkeyPrefix
-		copy(k[1:], pubkey)
-		binary.BigEndian.PutUint32(k[1+32:], uint32(evt.CreatedAt))
-		copy(k[1+32+4:], idx)
-		keys = append(keys, k)
-	}
-
-	{
-		// ~ by kind+date
-		k := make([]byte, 1+2+4+4)
-		k[0] = indexKindPrefix
-		binary.BigEndian.PutUint16(k[1:], uint16(evt.Kind))
-		binary.BigEndian.PutUint32(k[1+2:], uint32(evt.CreatedAt))
-		copy(k[1+2+4:], idx)
-		keys = append(keys, k)
-	}
-
-	{
-		// ~ by pubkey+kind+date
-		pubkey, _ := hex.DecodeString(evt.PubKey)
-		k := make([]byte, 1+32+2+4+4)
-		k[0] = indexPubkeyKindPrefix
-		copy(k[1:], pubkey)
-		binary.BigEndian.PutUint16(k[1+32:], uint16(evt.Kind))
-		binary.BigEndian.PutUint32(k[1+32+2:], uint32(evt.CreatedAt))
-		copy(k[1+32+2+4:], idx)
-		keys = append(keys, k)
-	}
-
-	// ~ by tagvalue+date
-	for _, tag := range evt.Tags {
-		if len(tag) < 2 || len(tag[0]) != 1 || len(tag[1]) == 0 || len(tag[1]) > 100 {
-			continue
-		}
-
-		var v []byte
-		if vb, _ := hex.DecodeString(tag[1]); len(vb) == 32 {
-			// store value as bytes
-			v = vb
-		} else {
-			v = []byte(tag[1])
-		}
-
-		k := make([]byte, 1+len(v)+4+4)
-		k[0] = indexTagPrefix
-		copy(k[1:], v)
-		binary.BigEndian.PutUint32(k[1+len(v):], uint32(evt.CreatedAt))
-		copy(k[1+len(v)+4:], idx)
-		keys = append(keys, k)
-	}
-
-	{
-		// ~ by date only
-		k := make([]byte, 1+4+4)
-		k[0] = indexCreatedAtPrefix
-		binary.BigEndian.PutUint32(k[1:], uint32(evt.CreatedAt))
-		copy(k[1+4:], idx)
-		keys = append(keys, k)
-	}
-
-	return keys
-}

plugins/storage/badgern/query.go

@@ -1,325 +0,0 @@
-package badgern
-
-import (
-	"container/heap"
-	"context"
-	"encoding/binary"
-	"encoding/hex"
-	"fmt"
-
-	"github.com/dgraph-io/badger/v4"
-	"github.com/nbd-wtf/go-nostr"
-	"github.com/nbd-wtf/go-nostr/nson"
-)
-
-type query struct {
-	i             int
-	prefix        []byte
-	startingPoint []byte
-	results       chan *nostr.Event
-	skipTimestamp bool
-}
-
-type queryEvent struct {
-	*nostr.Event
-	query int
-}
-
-func (b BadgerBackend) QueryEvents(ctx context.Context, filter nostr.Filter) (chan *nostr.Event, error) {
-	ch := make(chan *nostr.Event)
-
-	queries, extraFilter, since, prefixLen, idxOffset, err := prepareQueries(filter)
-	if err != nil {
-		return nil, err
-	}
-
-	go func() {
-		err := b.View(func(txn *badger.Txn) error {
-			// iterate only through keys and in reverse order
-			opts := badger.DefaultIteratorOptions
-			opts.PrefetchValues = false
-			opts.Reverse = true
-
-			// actually iterate
-			iteratorClosers := make([]func(), len(queries))
-			for i, q := range queries {
-				go func(i int, q query) {
-					it := txn.NewIterator(opts)
-					iteratorClosers[i] = it.Close
-
-					defer close(q.results)
-
-					for it.Seek(q.startingPoint); it.ValidForPrefix(q.prefix); it.Next() {
-						item := it.Item()
-						key := item.Key()
-
-						if !q.skipTimestamp {
-							createdAt := binary.BigEndian.Uint32(key[prefixLen:idxOffset])
-							if createdAt < since {
-								break
-							}
-						}
-
-						idx := make([]byte, 5)
-						idx[0] = rawEventStorePrefix
-						copy(idx[1:], key[idxOffset:])
-
-						// fetch actual event
-						item, err := txn.Get(idx)
-						if err != nil {
-							if err == badger.ErrDiscardedTxn {
-								return
-							}
-
-							panic(err)
-						}
-						err = item.Value(func(val []byte) error {
-							evt := &nostr.Event{}
-							if err := nson.Unmarshal(string(val), evt); err != nil {
-								return err
-							}
-
-							// check if this matches the other filters that were not part of the index
-							if extraFilter == nil || extraFilter.Matches(evt) {
-								q.results <- evt
-							}
-
-							return nil
-						})
-						if err != nil {
-							panic(err)
-						}
-					}
-				}(i, q)
-			}
-
-			// max number of events we'll return
-			limit := b.MaxLimit
-			if filter.Limit > 0 && filter.Limit < limit {
-				limit = filter.Limit
-			}
-
-			// receive results and ensure we only return the most recent ones always
-			emittedEvents := 0
-
-			// first pass
-			emitQueue := make(priorityQueue, 0, len(queries)+limit)
-			for _, q := range queries {
-				evt, ok := <-q.results
-				if ok {
-					emitQueue = append(emitQueue, &queryEvent{Event: evt, query: q.i})
-				}
-			}
-
-			// now it's a good time to schedule this
-			defer func() {
-				close(ch)
-				for _, itclose := range iteratorClosers {
-					itclose()
-				}
-			}()
-
-			// queue may be empty here if we have literally nothing
-			if len(emitQueue) == 0 {
-				return nil
-			}
-
-			heap.Init(&emitQueue)
-
-			// iterate until we've emitted all events required
-			for {
-				// emit latest event in queue
-				latest := emitQueue[0]
-				ch <- latest.Event
-
-				// stop when reaching limit
-				emittedEvents++
-				if emittedEvents == limit {
-					break
-				}
-
-				// fetch a new one from query results and replace the previous one with it
-				if evt, ok := <-queries[latest.query].results; ok {
-					emitQueue[0].Event = evt
-					heap.Fix(&emitQueue, 0)
-				} else {
-					// if this query has no more events we just remove this and proceed normally
-					heap.Remove(&emitQueue, 0)
-
-					// check if the list is empty and end
-					if len(emitQueue) == 0 {
-						break
-					}
-				}
-			}
-
-			return nil
-		})
-		if err != nil {
-			panic(err)
-		}
-	}()
-
-	return ch, nil
-}
-
-type priorityQueue []*queryEvent
-
-func (pq priorityQueue) Len() int { return len(pq) }
-
-func (pq priorityQueue) Less(i, j int) bool {
-	return pq[i].CreatedAt > pq[j].CreatedAt
-}
-
-func (pq priorityQueue) Swap(i, j int) {
-	pq[i], pq[j] = pq[j], pq[i]
-}
-
-func (pq *priorityQueue) Push(x any) {
-	item := x.(*queryEvent)
-	*pq = append(*pq, item)
-}
-
-func (pq *priorityQueue) Pop() any {
-	old := *pq
-	n := len(old)
-	item := old[n-1]
-	old[n-1] = nil // avoid memory leak
-	*pq = old[0 : n-1]
-	return item
-}
-
-func prepareQueries(filter nostr.Filter) (
-	queries []query,
-	extraFilter *nostr.Filter,
-	since uint32,
-	prefixLen int,
-	idxOffset int,
-	err error,
-) {
-	var index byte
-
-	if len(filter.IDs) > 0 {
-		index = indexIdPrefix
-		queries = make([]query, len(filter.IDs))
-		for i, idHex := range filter.IDs {
-			prefix := make([]byte, 1+32)
-			prefix[0] = index
-			id, _ := hex.DecodeString(idHex)
-			if len(id) != 32 {
-				return nil, nil, 0, 0, 0, fmt.Errorf("invalid id '%s'", idHex)
-			}
-			copy(prefix[1:], id)
-			queries[i] = query{i: i, prefix: prefix, skipTimestamp: true}
-		}
-	} else if len(filter.Authors) > 0 {
-		if len(filter.Kinds) == 0 {
-			index = indexPubkeyPrefix
-			queries = make([]query, len(filter.Authors))
-			for i, pubkeyHex := range filter.Authors {
-				pubkey, _ := hex.DecodeString(pubkeyHex)
-				if len(pubkey) != 32 {
-					continue
-				}
-				prefix := make([]byte, 1+32)
-				prefix[0] = index
-				copy(prefix[1:], pubkey)
-				queries[i] = query{i: i, prefix: prefix}
-			}
-		} else {
-			index = indexPubkeyKindPrefix
-			queries = make([]query, len(filter.Authors)*len(filter.Kinds))
-			i := 0
-			for _, pubkeyHex := range filter.Authors {
-				for _, kind := range filter.Kinds {
-					pubkey, _ := hex.DecodeString(pubkeyHex)
-					if len(pubkey) != 32 {
-						return nil, nil, 0, 0, 0, fmt.Errorf("invalid pubkey '%s'", pubkeyHex)
-					}
-					prefix := make([]byte, 1+32+2)
-					prefix[0] = index
-					copy(prefix[1:], pubkey)
-					binary.BigEndian.PutUint16(prefix[1+32:], uint16(kind))
-					queries[i] = query{i: i, prefix: prefix}
-					i++
-				}
-			}
-		}
-		extraFilter = &nostr.Filter{Tags: filter.Tags}
-	} else if len(filter.Tags) > 0 {
-		index = indexTagPrefix
-
-		// determine the size of the queries array by inspecting all tags sizes
-		size := 0
-		for _, values := range filter.Tags {
-			size += len(values)
-		}
-		queries = make([]query, size)
-
-		extraFilter = &nostr.Filter{Kinds: filter.Kinds}
-		i := 0
-		for _, values := range filter.Tags {
-			for _, value := range values {
-				bv, _ := hex.DecodeString(value)
-				var size int
-				if len(bv) == 32 {
-					// hex tag
-					size = 32
-				} else {
-					// string tag
-					bv = []byte(value)
-					size = len(bv)
-				}
-				prefix := make([]byte, 1+size)
-				prefix[0] = index
-				copy(prefix[1:], bv)
-				queries[i] = query{i: i, prefix: prefix}
-				i++
-			}
-		}
-	} else if len(filter.Kinds) > 0 {
-		index = indexKindPrefix
-		queries = make([]query, len(filter.Kinds))
-		for i, kind := range filter.Kinds {
-			prefix := make([]byte, 1+2)
-			prefix[0] = index
-			binary.BigEndian.PutUint16(prefix[1:], uint16(kind))
-			queries[i] = query{i: i, prefix: prefix}
-		}
-	} else {
-		index = indexCreatedAtPrefix
-		queries = make([]query, 1)
-		prefix := make([]byte, 1)
-		prefix[0] = index
-		queries[0] = query{i: 0, prefix: prefix}
-		extraFilter = nil
-	}
-
-	prefixLen = len(queries[0].prefix)
-
-	if index == indexIdPrefix {
-		idxOffset = prefixLen
-	} else {
-		idxOffset = prefixLen + 4
-	}
-
-	var until uint32 = 4294967295
-	if filter.Until != nil {
-		if fu := uint32(*filter.Until); fu < until {
-			until = fu + 1
-		}
-	}
-	for i, q := range queries {
-		queries[i].startingPoint = binary.BigEndian.AppendUint32(q.prefix, uint32(until))
-		queries[i].results = make(chan *nostr.Event, 12)
-	}
-
-	// this is where we'll end the iteration
-	if filter.Since != nil {
-		if fs := uint32(*filter.Since); fs > since {
-			since = fs
-		}
-	}
-
-	return queries, extraFilter, since, prefixLen, idxOffset, nil
-}

plugins/storage/badgern/save.go

@@ -1,32 +0,0 @@
-package badgern
-
-import (
-	"context"
-
-	"github.com/dgraph-io/badger/v4"
-	"github.com/nbd-wtf/go-nostr"
-	"github.com/nbd-wtf/go-nostr/nson"
-)
-
-func (b *BadgerBackend) SaveEvent(ctx context.Context, evt *nostr.Event) error {
-	return b.Update(func(txn *badger.Txn) error {
-		nson, err := nson.Marshal(evt)
-		if err != nil {
-			return err
-		}
-
-		idx := b.Serial()
-		// raw event store
-		if err := txn.Set(idx, []byte(nson)); err != nil {
-			return err
-		}
-
-		for _, k := range getIndexKeysForEvent(evt, idx[1:]) {
-			if err := txn.Set(k, nil); err != nil {
-				return err
-			}
-		}
-
-		return nil
-	})
-}

plugins/storage/elasticsearch/elasticsearch.go

@@ -1,182 +0,0 @@
-package elasticsearch
-
-import (
-	"bytes"
-	"context"
-	"encoding/json"
-	"fmt"
-	"io"
-	"strings"
-	"time"
-
-	"github.com/elastic/go-elasticsearch/v8"
-	"github.com/elastic/go-elasticsearch/v8/esutil"
-	"github.com/nbd-wtf/go-nostr"
-)
-
-type IndexedEvent struct {
-	Event         nostr.Event `json:"event"`
-	ContentSearch string      `json:"content_search"`
-}
-
-var indexMapping = `
-{
-	"settings": {
-		"number_of_shards": 1,
-		"number_of_replicas": 0
-	},
-	"mappings": {
-		"dynamic": false,
-		"properties": {
-			"event": {
-				"dynamic": false,
-				"properties": {
-					"id": {"type": "keyword"},
-					"pubkey": {"type": "keyword"},
-					"kind": {"type": "integer"},
-					"tags": {"type": "keyword"},
-					"created_at": {"type": "date"}
-				}
-			},
-			"content_search": {"type": "text"}
-		}
-	}
-}
-`
-
-type ElasticsearchStorage struct {
-	URL       string
-	IndexName string
-
-	es *elasticsearch.Client
-	bi esutil.BulkIndexer
-}
-
-func (ess *ElasticsearchStorage) Init() error {
-	if ess.IndexName == "" {
-		ess.IndexName = "events"
-	}
-
-	cfg := elasticsearch.Config{}
-	if ess.URL != "" {
-		cfg.Addresses = strings.Split(ess.URL, ",")
-	}
-	es, err := elasticsearch.NewClient(cfg)
-	if err != nil {
-		return err
-	}
-
-	res, err := es.Indices.Create(ess.IndexName, es.Indices.Create.WithBody(strings.NewReader(indexMapping)))
-	if err != nil {
-		return err
-	}
-	if res.IsError() {
-		body, _ := io.ReadAll(res.Body)
-		txt := string(body)
-		if !strings.Contains(txt, "resource_already_exists_exception") {
-			return fmt.Errorf("%s", txt)
-		}
-	}
-
-	// bulk indexer
-	bi, err := esutil.NewBulkIndexer(esutil.BulkIndexerConfig{
-		Index:         ess.IndexName,
-		Client:        es,
-		NumWorkers:    2,
-		FlushInterval: 3 * time.Second,
-	})
-	if err != nil {
-		return fmt.Errorf("error creating the indexer: %s", err)
-	}
-
-	ess.es = es
-	ess.bi = bi
-
-	return nil
-}
-
-func (ess *ElasticsearchStorage) DeleteEvent(ctx context.Context, evt *nostr.Event) error {
-	done := make(chan error)
-	err := ess.bi.Add(
-		ctx,
-		esutil.BulkIndexerItem{
-			Action:     "delete",
-			DocumentID: evt.ID,
-			OnSuccess: func(ctx context.Context, item esutil.BulkIndexerItem, res esutil.BulkIndexerResponseItem) {
-				close(done)
-			},
-			OnFailure: func(ctx context.Context, item esutil.BulkIndexerItem, res esutil.BulkIndexerResponseItem, err error) {
-				if err != nil {
-					done <- err
-				} else {
-					// ok if deleted item not found
-					if res.Status == 404 {
-						close(done)
-						return
-					}
-					txt, _ := json.Marshal(res)
-					err := fmt.Errorf("ERROR: %s", txt)
-					done <- err
-				}
-			},
-		},
-	)
-	if err != nil {
-		return err
-	}
-
-	err = <-done
-	return err
-}
-
-func (ess *ElasticsearchStorage) SaveEvent(ctx context.Context, evt *nostr.Event) error {
-	ie := &IndexedEvent{
-		Event: *evt,
-	}
-
-	// post processing: index for FTS
-	// some ideas:
-	// - index kind=0 fields a set of dedicated mapped fields
-	//   (or use a separate index for profiles with a dedicated mapping)
-	// - if it's valid JSON just index the "values" and not the keys
-	// - more content introspection: language detection
-	// - denormalization... attach profile + ranking signals to events
-	if evt.Kind != 4 {
-		ie.ContentSearch = evt.Content
-	}
-
-	data, err := json.Marshal(ie)
-	if err != nil {
-		return err
-	}
-
-	done := make(chan error)
-
-	// adapted from:
-	// https://github.com/elastic/go-elasticsearch/blob/main/_examples/bulk/indexer.go#L196
-	err = ess.bi.Add(
-		ctx,
-		esutil.BulkIndexerItem{
-			Action:     "index",
-			DocumentID: evt.ID,
-			Body:       bytes.NewReader(data),
-			OnSuccess: func(ctx context.Context, item esutil.BulkIndexerItem, res esutil.BulkIndexerResponseItem) {
-				close(done)
-			},
-			OnFailure: func(ctx context.Context, item esutil.BulkIndexerItem, res esutil.BulkIndexerResponseItem, err error) {
-				if err != nil {
-					done <- err
-				} else {
-					err := fmt.Errorf("ERROR: %s: %s", res.Error.Type, res.Error.Reason)
-					done <- err
-				}
-			},
-		},
-	)
-	if err != nil {
-		return err
-	}
-
-	err = <-done
-	return err
-}

plugins/storage/elasticsearch/query.go

@@ -1,261 +0,0 @@
-package elasticsearch
-
-import (
-	"bytes"
-	"context"
-	"encoding/json"
-	"fmt"
-	"io"
-	"log"
-	"reflect"
-
-	"github.com/aquasecurity/esquery"
-	"github.com/elastic/go-elasticsearch/v8/esutil"
-	"github.com/nbd-wtf/go-nostr"
-)
-
-type EsSearchResult struct {
-	Took     int
-	TimedOut bool `json:"timed_out"`
-	Hits     struct {
-		Total struct {
-			Value    int
-			Relation string
-		}
-		Hits []struct {
-			Source IndexedEvent `json:"_source"`
-		}
-	}
-}
-
-type EsCountResult struct {
-	Count int64
-}
-
-func buildDsl(filter nostr.Filter) ([]byte, error) {
-	dsl := esquery.Bool()
-
-	prefixFilter := func(fieldName string, values []string) {
-		if len(values) == 0 {
-			return
-		}
-		prefixQ := esquery.Bool()
-		for _, v := range values {
-			if len(v) < 64 {
-				prefixQ.Should(esquery.Prefix(fieldName, v))
-			} else {
-				prefixQ.Should(esquery.Term(fieldName, v))
-			}
-		}
-		dsl.Must(prefixQ)
-	}
-
-	// ids
-	prefixFilter("event.id", filter.IDs)
-
-	// authors
-	prefixFilter("event.pubkey", filter.Authors)
-
-	// kinds
-	if len(filter.Kinds) > 0 {
-		dsl.Must(esquery.Terms("event.kind", toInterfaceSlice(filter.Kinds)...))
-	}
-
-	// tags
-	if len(filter.Tags) > 0 {
-		tagQ := esquery.Bool()
-		for char, terms := range filter.Tags {
-			vs := toInterfaceSlice(append(terms, char))
-			tagQ.Should(esquery.Terms("event.tags", vs...))
-		}
-		dsl.Must(tagQ)
-	}
-
-	// since
-	if filter.Since != nil {
-		dsl.Must(esquery.Range("event.created_at").Gt(filter.Since))
-	}
-
-	// until
-	if filter.Until != nil {
-		dsl.Must(esquery.Range("event.created_at").Lt(filter.Until))
-	}
-
-	// search
-	if filter.Search != "" {
-		dsl.Must(esquery.Match("content_search", filter.Search))
-	}
-
-	return json.Marshal(esquery.Query(dsl))
-}
-
-func (ess *ElasticsearchStorage) getByID(filter nostr.Filter) ([]*nostr.Event, error) {
-	got, err := ess.es.Mget(
-		esutil.NewJSONReader(filter),
-		ess.es.Mget.WithIndex(ess.IndexName))
-	if err != nil {
-		return nil, err
-	}
-
-	var mgetResponse struct {
-		Docs []struct {
-			Found  bool
-			Source IndexedEvent `json:"_source"`
-		}
-	}
-	if err := json.NewDecoder(got.Body).Decode(&mgetResponse); err != nil {
-		return nil, err
-	}
-
-	events := make([]*nostr.Event, 0, len(mgetResponse.Docs))
-	for _, e := range mgetResponse.Docs {
-		if e.Found {
-			events = append(events, &e.Source.Event)
-		}
-	}
-
-	return events, nil
-}
-
-func (ess *ElasticsearchStorage) QueryEvents(ctx context.Context, filter nostr.Filter) (chan *nostr.Event, error) {
-	ch := make(chan *nostr.Event)
-
-	// optimization: get by id
-	if isGetByID(filter) {
-		if evts, err := ess.getByID(filter); err == nil {
-			for _, evt := range evts {
-				ch <- evt
-			}
-			close(ch)
-		} else {
-			return nil, fmt.Errorf("error getting by id: %w", err)
-		}
-	}
-
-	dsl, err := buildDsl(filter)
-	if err != nil {
-		return nil, err
-	}
-
-	limit := 1000
-	if filter.Limit > 0 && filter.Limit < limit {
-		limit = filter.Limit
-	}
-
-	es := ess.es
-	res, err := es.Search(
-		es.Search.WithContext(ctx),
-		es.Search.WithIndex(ess.IndexName),
-
-		es.Search.WithBody(bytes.NewReader(dsl)),
-		es.Search.WithSize(limit),
-		es.Search.WithSort("event.created_at:desc"),
-	)
-	if err != nil {
-		log.Fatalf("Error getting response: %s", err)
-	}
-	defer res.Body.Close()
-
-	if res.IsError() {
-		txt, _ := io.ReadAll(res.Body)
-		fmt.Println("oh no", string(txt))
-		return nil, fmt.Errorf("%s", txt)
-	}
-
-	var r EsSearchResult
-	if err := json.NewDecoder(res.Body).Decode(&r); err != nil {
-		return nil, err
-	}
-
-	go func() {
-		for _, e := range r.Hits.Hits {
-			ch <- &e.Source.Event
-		}
-		close(ch)
-	}()
-
-	return ch, nil
-}
-
-func isGetByID(filter nostr.Filter) bool {
-	isGetById := len(filter.IDs) > 0 &&
-		len(filter.Authors) == 0 &&
-		len(filter.Kinds) == 0 &&
-		len(filter.Tags) == 0 &&
-		len(filter.Search) == 0 &&
-		filter.Since == nil &&
-		filter.Until == nil
-
-	if isGetById {
-		for _, id := range filter.IDs {
-			if len(id) != 64 {
-				return false
-			}
-		}
-	}
-	return isGetById
-}
-
-// from: https://stackoverflow.com/a/12754757
-func toInterfaceSlice(slice interface{}) []interface{} {
-	s := reflect.ValueOf(slice)
-	if s.Kind() != reflect.Slice {
-		panic("InterfaceSlice() given a non-slice type")
-	}
-
-	// Keep the distinction between nil and empty slice input
-	if s.IsNil() {
-		return nil
-	}
-
-	ret := make([]interface{}, s.Len())
-
-	for i := 0; i < s.Len(); i++ {
-		ret[i] = s.Index(i).Interface()
-	}
-
-	return ret
-}
-
-func (ess *ElasticsearchStorage) CountEvents(ctx context.Context, filter nostr.Filter) (int64, error) {
-	count := int64(0)
-
-	// optimization: get by id
-	if isGetByID(filter) {
-		if evts, err := ess.getByID(filter); err == nil {
-			count += int64(len(evts))
-		} else {
-			return 0, fmt.Errorf("error getting by id: %w", err)
-		}
-	}
-
-	dsl, err := buildDsl(filter)
-	if err != nil {
-		return 0, err
-	}
-
-	es := ess.es
-	res, err := es.Count(
-		es.Count.WithContext(ctx),
-		es.Count.WithIndex(ess.IndexName),
-
-		es.Count.WithBody(bytes.NewReader(dsl)),
-	)
-	if err != nil {
-		log.Fatalf("Error getting response: %s", err)
-	}
-	defer res.Body.Close()
-
-	if res.IsError() {
-		txt, _ := io.ReadAll(res.Body)
-		fmt.Println("oh no", string(txt))
-		return 0, fmt.Errorf("%s", txt)
-	}
-
-	var r EsCountResult
-	if err := json.NewDecoder(res.Body).Decode(&r); err != nil {
-		return 0, err
-	}
-
-	return r.Count + count, nil
-}

plugins/storage/elasticsearch/query_test.go

@@ -1,43 +0,0 @@
-package elasticsearch
-
-import (
-	"bytes"
-	"encoding/json"
-	"fmt"
-	"testing"
-
-	"github.com/nbd-wtf/go-nostr"
-)
-
-func TestQuery(t *testing.T) {
-	now := nostr.Now()
-	yesterday := now - 60*60*24
-	filter := &nostr.Filter{
-		IDs:   []string{"abc", "123", "971b9489b4fd4e41a85951607922b982d981fa9d55318bc304f21f390721404c"},
-		Kinds: []int{0, 1},
-		Tags: nostr.TagMap{
-			"e": []string{"abc"},
-			"p": []string{"aaa", "bbb"},
-		},
-		Since:  &yesterday,
-		Until:  &now,
-		Limit:  100,
-		Search: "other stuff",
-	}
-
-	dsl, err := buildDsl(filter)
-	if err != nil {
-		t.Fatal(err)
-	}
-	pprint(dsl)
-}
-
-func pprint(j []byte) {
-	var dst bytes.Buffer
-	err := json.Indent(&dst, j, "", "    ")
-	if err != nil {
-		fmt.Println("invalid JSON", err, string(j))
-	} else {
-		fmt.Println(dst.String())
-	}
-}

plugins/storage/lmdbn/count.go

@@ -1,91 +0,0 @@
-package lmdbn
-
-import (
-	"bytes"
-	"context"
-	"encoding/binary"
-
-	"github.com/bmatsuo/lmdb-go/lmdb"
-	"github.com/nbd-wtf/go-nostr"
-	"github.com/nbd-wtf/go-nostr/nson"
-)
-
-func (b *LMDBBackend) CountEvents(ctx context.Context, filter nostr.Filter) (int64, error) {
-	var count int64 = 0
-
-	dbi, queries, extraFilter, since, prefixLen, err := b.prepareQueries(filter)
-	if err != nil {
-		return 0, err
-	}
-
-	err = b.lmdbEnv.View(func(txn *lmdb.Txn) error {
-		// actually iterate
-		for _, q := range queries {
-			cursor, err := txn.OpenCursor(dbi)
-			if err != nil {
-				continue
-			}
-
-			var k []byte
-			var idx []byte
-			var iterr error
-
-			if _, _, errsr := cursor.Get(q.startingPoint, nil, lmdb.SetRange); errsr != nil {
-				if operr, ok := errsr.(*lmdb.OpError); !ok || operr.Errno != lmdb.NotFound {
-					// in this case it's really an error
-					panic(err)
-				} else {
-					// we're at the end and we just want notes before this,
-					// so we just need to set the cursor the last key, this is not a real error
-					k, idx, iterr = cursor.Get(nil, nil, lmdb.Last)
-				}
-			} else {
-				// move one back as the first step
-				k, idx, iterr = cursor.Get(nil, nil, lmdb.Prev)
-			}
-
-			for {
-				// we already have a k and a v and an err from the cursor setup, so check and use these
-				if iterr != nil || !bytes.Equal(q.prefix, k[0:prefixLen]) {
-					break
-				}
-
-				if !q.skipTimestamp {
-					createdAt := binary.BigEndian.Uint32(k[prefixLen:])
-					if createdAt < since {
-						break
-					}
-				}
-
-				// fetch actual event
-				val, err := txn.Get(b.rawEventStore, idx)
-				if err != nil {
-					panic(err)
-				}
-
-				if extraFilter == nil {
-					count++
-				} else {
-					evt := &nostr.Event{}
-					if err := nson.Unmarshal(string(val), evt); err != nil {
-						return err
-					}
-
-					// check if this matches the other filters that were not part of the index
-					if extraFilter == nil || extraFilter.Matches(evt) {
-						count++
-					}
-
-					return nil
-				}
-
-				// move one back (we'll look into k and v and err in the next iteration)
-				k, idx, iterr = cursor.Get(nil, nil, lmdb.Prev)
-			}
-		}
-
-		return nil
-	})
-
-	return count, err
-}

plugins/storage/lmdbn/delete.go

@@ -1,50 +0,0 @@
-package lmdbn
-
-import (
-	"context"
-	"encoding/hex"
-
-	"github.com/bmatsuo/lmdb-go/lmdb"
-	"github.com/nbd-wtf/go-nostr"
-	"github.com/nbd-wtf/go-nostr/nson"
-)
-
-func (b *LMDBBackend) DeleteEvent(ctx context.Context, evt *nostr.Event) error {
-	err := b.lmdbEnv.Update(func(txn *lmdb.Txn) error {
-		id, _ := hex.DecodeString(evt.ID)
-		idx, err := txn.Get(b.indexId, id)
-		if operr, ok := err.(*lmdb.OpError); ok && operr.Errno == lmdb.NotFound {
-			// we already do not have this
-			return nil
-		}
-		if err != nil {
-			return err
-		}
-
-		// fetch the event
-		val, err := txn.Get(b.rawEventStore, idx)
-		if err != nil {
-			return err
-		}
-
-		evt := &nostr.Event{}
-		if err := nson.Unmarshal(string(val), evt); err != nil {
-			return err
-		}
-
-		// calculate all index keys we have for this event and delete them
-		for _, k := range b.getIndexKeysForEvent(evt) {
-			if err := txn.Del(k.dbi, k.key, nil); err != nil {
-				return err
-			}
-		}
-
-		// delete the raw event
-		return txn.Del(b.rawEventStore, idx, nil)
-	})
-	if err != nil {
-		return err
-	}
-
-	return nil
-}

plugins/storage/lmdbn/lib.go

@@ -1,208 +0,0 @@
-package lmdbn
-
-import (
-	"encoding/binary"
-	"encoding/hex"
-	"sync/atomic"
-
-	"github.com/bmatsuo/lmdb-go/lmdb"
-	"github.com/nbd-wtf/go-nostr"
-)
-
-const (
-	maxuint16 = 65535
-	maxuint32 = 4294967295
-)
-
-type LMDBBackend struct {
-	Path     string
-	MaxLimit int
-
-	lmdbEnv *lmdb.Env
-
-	rawEventStore   lmdb.DBI
-	indexCreatedAt  lmdb.DBI
-	indexId         lmdb.DBI
-	indexKind       lmdb.DBI
-	indexPubkey     lmdb.DBI
-	indexPubkeyKind lmdb.DBI
-	indexTag        lmdb.DBI
-
-	lastId atomic.Uint32
-}
-
-func (b *LMDBBackend) Init() error {
-	if b.MaxLimit == 0 {
-		b.MaxLimit = 500
-	}
-
-	// open lmdb
-	env, err := lmdb.NewEnv()
-	if err != nil {
-		return err
-	}
-
-	env.SetMaxDBs(7)
-	env.SetMaxReaders(500)
-	env.SetMapSize(1 << 38) // ~273GB
-
-	err = env.Open(b.Path, lmdb.NoTLS, 0644)
-	if err != nil {
-		return err
-	}
-	b.lmdbEnv = env
-
-	// open each db
-	if err := b.lmdbEnv.Update(func(txn *lmdb.Txn) error {
-		if dbi, err := txn.OpenDBI("raw", lmdb.Create); err != nil {
-			return err
-		} else {
-			b.rawEventStore = dbi
-			return nil
-		}
-	}); err != nil {
-		return err
-	}
-	if err := b.lmdbEnv.Update(func(txn *lmdb.Txn) error {
-		if dbi, err := txn.OpenDBI("created_at", lmdb.Create); err != nil {
-			return err
-		} else {
-			b.indexCreatedAt = dbi
-		}
-		if dbi, err := txn.OpenDBI("id", lmdb.Create); err != nil {
-			return err
-		} else {
-			b.indexId = dbi
-		}
-		if dbi, err := txn.OpenDBI("kind", lmdb.Create); err != nil {
-			return err
-		} else {
-			b.indexKind = dbi
-		}
-		if dbi, err := txn.OpenDBI("pubkey", lmdb.Create); err != nil {
-			return err
-		} else {
-			b.indexPubkey = dbi
-		}
-		if dbi, err := txn.OpenDBI("pubkeyKind", lmdb.Create); err != nil {
-			return err
-		} else {
-			b.indexPubkeyKind = dbi
-		}
-		if dbi, err := txn.OpenDBI("tag", lmdb.Create); err != nil {
-			return err
-		} else {
-			b.indexTag = dbi
-		}
-		return nil
-	}); err != nil {
-		return err
-	}
-
-	// get lastId
-	if err := b.lmdbEnv.View(func(txn *lmdb.Txn) error {
-		txn.RawRead = true
-		cursor, err := txn.OpenCursor(b.rawEventStore)
-		if err != nil {
-			return err
-		}
-		defer cursor.Close()
-		k, _, err := cursor.Get(nil, nil, lmdb.Last)
-		if operr, ok := err.(*lmdb.OpError); ok && operr.Errno == lmdb.NotFound {
-			// nothing found, so we're at zero
-			return nil
-		}
-		if err != nil {
-		}
-		b.lastId.Store(binary.BigEndian.Uint32(k))
-
-		return nil
-	}); err != nil {
-		return err
-	}
-
-	return nil
-}
-
-func (b *LMDBBackend) Close() {
-	b.lmdbEnv.Close()
-}
-
-func (b *LMDBBackend) Serial() []byte {
-	v := b.lastId.Add(1)
-	vb := make([]byte, 4)
-	binary.BigEndian.PutUint32(vb[:], uint32(v))
-	return vb
-}
-
-type key struct {
-	dbi lmdb.DBI
-	key []byte
-}
-
-func (b *LMDBBackend) getIndexKeysForEvent(evt *nostr.Event) []key {
-	keys := make([]key, 0, 18)
-
-	// indexes
-	{
-		// ~ by id
-		k, _ := hex.DecodeString(evt.ID)
-		keys = append(keys, key{dbi: b.indexId, key: k})
-	}
-
-	{
-		// ~ by pubkey+date
-		pubkey, _ := hex.DecodeString(evt.PubKey)
-		k := make([]byte, 32+4)
-		copy(k[:], pubkey)
-		binary.BigEndian.PutUint32(k[32:], uint32(evt.CreatedAt))
-		keys = append(keys, key{dbi: b.indexPubkey, key: k})
-	}
-
-	{
-		// ~ by kind+date
-		k := make([]byte, 2+4)
-		binary.BigEndian.PutUint16(k[:], uint16(evt.Kind))
-		binary.BigEndian.PutUint32(k[2:], uint32(evt.CreatedAt))
-		keys = append(keys, key{dbi: b.indexKind, key: k})
-	}
-
-	{
-		// ~ by pubkey+kind+date
-		pubkey, _ := hex.DecodeString(evt.PubKey)
-		k := make([]byte, 32+2+4)
-		copy(k[:], pubkey)
-		binary.BigEndian.PutUint16(k[32:], uint16(evt.Kind))
-		binary.BigEndian.PutUint32(k[32+2:], uint32(evt.CreatedAt))
-		keys = append(keys, key{dbi: b.indexPubkeyKind, key: k})
-	}
-
-	// ~ by tagvalue+date
-	for _, tag := range evt.Tags {
-		if len(tag) < 2 || len(tag[0]) != 1 || len(tag[1]) == 0 || len(tag[1]) > 100 {
-			continue
-		}
-
-		var v []byte
-		if vb, _ := hex.DecodeString(tag[1]); len(vb) == 32 {
-			// store value as bytes
-			v = vb
-		} else {
-			v = []byte(tag[1])
-		}
-
-		k := make([]byte, len(v)+4)
-		copy(k[:], v)
-		binary.BigEndian.PutUint32(k[len(v):], uint32(evt.CreatedAt))
-		keys = append(keys, key{dbi: b.indexTag, key: k})
-	}
-
-	{
-		// ~ by date only
-		k := make([]byte, 4)
-		binary.BigEndian.PutUint32(k[:], uint32(evt.CreatedAt))
-		keys = append(keys, key{dbi: b.indexCreatedAt, key: k})
-	}
-
-	return keys
-}

plugins/storage/lmdbn/query.go

@@ -1,321 +0,0 @@
-package lmdbn
-
-import (
-	"bytes"
-	"container/heap"
-	"context"
-	"encoding/binary"
-	"encoding/hex"
-	"fmt"
-
-	"github.com/bmatsuo/lmdb-go/lmdb"
-	"github.com/nbd-wtf/go-nostr"
-	"github.com/nbd-wtf/go-nostr/nson"
-)
-
-type query struct {
-	i             int
-	prefix        []byte
-	startingPoint []byte
-	results       chan *nostr.Event
-	skipTimestamp bool
-}
-
-type queryEvent struct {
-	*nostr.Event
-	query int
-}
-
-func (b *LMDBBackend) QueryEvents(ctx context.Context, filter nostr.Filter) (chan *nostr.Event, error) {
-	ch := make(chan *nostr.Event)
-
-	dbi, queries, extraFilter, since, prefixLen, err := b.prepareQueries(filter)
-	if err != nil {
-		return nil, err
-	}
-
-	go func() {
-		err := b.lmdbEnv.View(func(txn *lmdb.Txn) error {
-			// actually iterate
-			cursorClosers := make([]func(), len(queries))
-			for i, q := range queries {
-				go func(i int, q query) {
-					defer close(q.results)
-
-					cursor, err := txn.OpenCursor(dbi)
-					if err != nil {
-						return
-					}
-					cursorClosers[i] = cursor.Close
-
-					var k []byte
-					var idx []byte
-					var iterr error
-
-					if _, _, errsr := cursor.Get(q.startingPoint, nil, lmdb.SetRange); errsr != nil {
-						if operr, ok := errsr.(*lmdb.OpError); !ok || operr.Errno != lmdb.NotFound {
-							// in this case it's really an error
-							panic(err)
-						} else {
-							// we're at the end and we just want notes before this,
-							// so we just need to set the cursor the last key, this is not a real error
-							k, idx, iterr = cursor.Get(nil, nil, lmdb.Last)
-						}
-					} else {
-						// move one back as the first step
-						k, idx, iterr = cursor.Get(nil, nil, lmdb.Prev)
-					}
-
-					for {
-						select {
-						case <-ctx.Done():
-							break
-						default:
-						}
-
-						// we already have a k and a v and an err from the cursor setup, so check and use these
-						if iterr != nil || !bytes.Equal(q.prefix, k[0:prefixLen]) {
-							return
-						}
-
-						if !q.skipTimestamp {
-							createdAt := binary.BigEndian.Uint32(k[prefixLen:])
-							if createdAt < since {
-								break
-							}
-						}
-
-						// fetch actual event
-						val, err := txn.Get(b.rawEventStore, idx)
-						if err != nil {
-							panic(err)
-						}
-
-						evt := &nostr.Event{}
-						if err := nson.Unmarshal(string(val), evt); err != nil {
-							panic(err)
-						}
-
-						// check if this matches the other filters that were not part of the index
-						if extraFilter == nil || extraFilter.Matches(evt) {
-							q.results <- evt
-						}
-
-						// move one back (we'll look into k and v and err in the next iteration)
-						k, idx, iterr = cursor.Get(nil, nil, lmdb.Prev)
-					}
-				}(i, q)
-			}
-
-			// max number of events we'll return
-			limit := b.MaxLimit
-			if filter.Limit > 0 && filter.Limit < limit {
-				limit = filter.Limit
-			}
-
-			// receive results and ensure we only return the most recent ones always
-			emittedEvents := 0
-
-			// first pass
-			emitQueue := make(priorityQueue, 0, len(queries)+limit)
-			for _, q := range queries {
-				evt, ok := <-q.results
-				if ok {
-					emitQueue = append(emitQueue, &queryEvent{Event: evt, query: q.i})
-				}
-			}
-
-			// now it's a good time to schedule this
-			defer func() {
-				close(ch)
-				for _, cclose := range cursorClosers {
-					cclose()
-				}
-			}()
-
-			// queue may be empty here if we have literally nothing
-			if len(emitQueue) == 0 {
-				return nil
-			}
-
-			heap.Init(&emitQueue)
-
-			// iterate until we've emitted all events required
-			for {
-				// emit latest event in queue
-				latest := emitQueue[0]
-				ch <- latest.Event
-
-				// stop when reaching limit
-				emittedEvents++
-				if emittedEvents >= limit {
-					break
-				}
-
-				// fetch a new one from query results and replace the previous one with it
-				if evt, ok := <-queries[latest.query].results; ok {
-					emitQueue[0].Event = evt
-					heap.Fix(&emitQueue, 0)
-				} else {
-					// if this query has no more events we just remove this and proceed normally
-					heap.Remove(&emitQueue, 0)
-
-					// check if the list is empty and end
-					if len(emitQueue) == 0 {
-						break
-					}
-				}
-			}
-
-			return nil
-		})
-		if err != nil {
-			panic(err)
-		}
-	}()
-
-	return ch, nil
-}
-
-type priorityQueue []*queryEvent
-
-func (pq priorityQueue) Len() int { return len(pq) }
-
-func (pq priorityQueue) Less(i, j int) bool {
-	return pq[i].CreatedAt > pq[j].CreatedAt
-}
-
-func (pq priorityQueue) Swap(i, j int) {
-	pq[i], pq[j] = pq[j], pq[i]
-}
-
-func (pq *priorityQueue) Push(x any) {
-	item := x.(*queryEvent)
-	*pq = append(*pq, item)
-}
-
-func (pq *priorityQueue) Pop() any {
-	old := *pq
-	n := len(old)
-	item := old[n-1]
-	old[n-1] = nil // avoid memory leak
-	*pq = old[0 : n-1]
-	return item
-}
-
-func (b *LMDBBackend) prepareQueries(filter nostr.Filter) (
-	dbi lmdb.DBI,
-	queries []query,
-	extraFilter *nostr.Filter,
-	since uint32,
-	prefixLen int,
-	err error,
-) {
-	if len(filter.IDs) > 0 {
-		dbi = b.indexId
-		queries = make([]query, len(filter.IDs))
-		for i, idHex := range filter.IDs {
-			prefix, _ := hex.DecodeString(idHex)
-			if len(prefix) != 32 {
-				return dbi, nil, nil, 0, 0, fmt.Errorf("invalid id '%s'", idHex)
-			}
-			queries[i] = query{i: i, prefix: prefix, skipTimestamp: true}
-		}
-	} else if len(filter.Authors) > 0 {
-		if len(filter.Kinds) == 0 {
-			dbi = b.indexPubkey
-			queries = make([]query, len(filter.Authors))
-			for i, pubkeyHex := range filter.Authors {
-				prefix, _ := hex.DecodeString(pubkeyHex)
-				if len(prefix) != 32 {
-					return dbi, nil, nil, 0, 0, fmt.Errorf("invalid pubkey '%s'", pubkeyHex)
-				}
-				queries[i] = query{i: i, prefix: prefix}
-			}
-		} else {
-			dbi = b.indexPubkeyKind
-			queries = make([]query, len(filter.Authors)*len(filter.Kinds))
-			i := 0
-			for _, pubkeyHex := range filter.Authors {
-				for _, kind := range filter.Kinds {
-					pubkey, _ := hex.DecodeString(pubkeyHex)
-					if len(pubkey) != 32 {
-						return dbi, nil, nil, 0, 0, fmt.Errorf("invalid pubkey '%s'", pubkeyHex)
-					}
-					prefix := make([]byte, 32+2)
-					copy(prefix[:], pubkey)
-					binary.BigEndian.PutUint16(prefix[+32:], uint16(kind))
-					queries[i] = query{i: i, prefix: prefix}
-					i++
-				}
-			}
-		}
-		extraFilter = &nostr.Filter{Tags: filter.Tags}
-	} else if len(filter.Tags) > 0 {
-		dbi = b.indexTag
-
-		// determine the size of the queries array by inspecting all tags sizes
-		size := 0
-		for _, values := range filter.Tags {
-			size += len(values)
-		}
-		queries = make([]query, size)
-
-		extraFilter = &nostr.Filter{Kinds: filter.Kinds}
-		i := 0
-		for _, values := range filter.Tags {
-			for _, value := range values {
-				bv, _ := hex.DecodeString(value)
-				var size int
-				if len(bv) == 32 {
-					// hex tag
-					size = 32
-				} else {
-					// string tag
-					bv = []byte(value)
-					size = len(bv)
-				}
-				prefix := make([]byte, size)
-				copy(prefix[:], bv)
-				queries[i] = query{i: i, prefix: prefix}
-				i++
-			}
-		}
-	} else if len(filter.Kinds) > 0 {
-		dbi = b.indexKind
-		queries = make([]query, len(filter.Kinds))
-		for i, kind := range filter.Kinds {
-			prefix := make([]byte, 2)
-			binary.BigEndian.PutUint16(prefix[:], uint16(kind))
-			queries[i] = query{i: i, prefix: prefix}
-		}
-	} else {
-		dbi = b.indexCreatedAt
-		queries = make([]query, 1)
-		prefix := make([]byte, 0)
-		queries[0] = query{i: 0, prefix: prefix}
-		extraFilter = nil
-	}
-
-	prefixLen = len(queries[0].prefix)
-
-	var until uint32 = 4294967295
-	if filter.Until != nil {
-		if fu := uint32(*filter.Until); fu < until {
-			until = fu + 1
-		}
-	}
-	for i, q := range queries {
-		queries[i].startingPoint = binary.BigEndian.AppendUint32(q.prefix, uint32(until))
-		queries[i].results = make(chan *nostr.Event, 12)
-	}
-
-	// this is where we'll end the iteration
-	if filter.Since != nil {
-		if fs := uint32(*filter.Since); fs > since {
-			since = fs
-		}
-	}
-
-	return dbi, queries, extraFilter, since, prefixLen, nil
-}

plugins/storage/lmdbn/save.go

@@ -1,38 +0,0 @@
-package lmdbn
-
-import (
-	"context"
-	"fmt"
-
-	"github.com/bmatsuo/lmdb-go/lmdb"
-	"github.com/nbd-wtf/go-nostr"
-	"github.com/nbd-wtf/go-nostr/nson"
-)
-
-func (b *LMDBBackend) SaveEvent(ctx context.Context, evt *nostr.Event) error {
-	// sanity checking
-	if evt.CreatedAt > maxuint32 || evt.Kind > maxuint16 {
-		return fmt.Errorf("event with values out of expected boundaries")
-	}
-
-	return b.lmdbEnv.Update(func(txn *lmdb.Txn) error {
-		nson, err := nson.Marshal(evt)
-		if err != nil {
-			return err
-		}
-
-		idx := b.Serial()
-		// raw event store
-		if err := txn.Put(b.rawEventStore, idx, []byte(nson), 0); err != nil {
-			return err
-		}
-
-		for _, k := range b.getIndexKeysForEvent(evt) {
-			if err := txn.Put(k.dbi, k.key, idx, 0); err != nil {
-				return err
-			}
-		}
-
-		return nil
-	})
-}

plugins/storage/postgresql/delete.go

@@ -1,12 +0,0 @@
-package postgresql
-
-import (
-	"context"
-
-	"github.com/nbd-wtf/go-nostr"
-)
-
-func (b PostgresBackend) DeleteEvent(ctx context.Context, evt *nostr.Event) error {
-	_, err := b.DB.ExecContext(ctx, "DELETE FROM event WHERE id = $1", evt.ID)
-	return err
-}

plugins/storage/postgresql/init.go

@@ -1,71 +0,0 @@
-package postgresql
-
-import (
-	"github.com/jmoiron/sqlx"
-	"github.com/jmoiron/sqlx/reflectx"
-	_ "github.com/lib/pq"
-)
-
-const (
-	queryLimit        = 100
-	queryIDsLimit     = 500
-	queryAuthorsLimit = 500
-	queryKindsLimit   = 10
-	queryTagsLimit    = 10
-)
-
-func (b *PostgresBackend) Init() error {
-	db, err := sqlx.Connect("postgres", b.DatabaseURL)
-	if err != nil {
-		return err
-	}
-
-	// sqlx default is 0 (unlimited), while postgresql by default accepts up to 100 connections
-	db.SetMaxOpenConns(80)
-
-	db.Mapper = reflectx.NewMapperFunc("json", sqlx.NameMapper)
-	b.DB = db
-
-	_, err = b.DB.Exec(`
-CREATE OR REPLACE FUNCTION tags_to_tagvalues(jsonb) RETURNS text[]
-    AS 'SELECT array_agg(t->>1) FROM (SELECT jsonb_array_elements($1) AS t)s WHERE length(t->>0) = 1;'
-    LANGUAGE SQL
-    IMMUTABLE
-    RETURNS NULL ON NULL INPUT;
-
-CREATE TABLE IF NOT EXISTS event (
-  id text NOT NULL,
-  pubkey text NOT NULL,
-  created_at integer NOT NULL,
-  kind integer NOT NULL,
-  tags jsonb NOT NULL,
-  content text NOT NULL,
-  sig text NOT NULL,
-
-  tagvalues text[] GENERATED ALWAYS AS (tags_to_tagvalues(tags)) STORED
-);
-
-CREATE UNIQUE INDEX IF NOT EXISTS ididx ON event USING btree (id text_pattern_ops);
-CREATE INDEX IF NOT EXISTS pubkeyprefix ON event USING btree (pubkey text_pattern_ops);
-CREATE INDEX IF NOT EXISTS timeidx ON event (created_at DESC);
-CREATE INDEX IF NOT EXISTS kindidx ON event (kind);
-CREATE INDEX IF NOT EXISTS arbitrarytagvalues ON event USING gin (tagvalues);
-    `)
-
-	if b.QueryLimit == 0 {
-		b.QueryLimit = queryLimit
-	}
-	if b.QueryIDsLimit == 0 {
-		b.QueryIDsLimit = queryIDsLimit
-	}
-	if b.QueryAuthorsLimit == 0 {
-		b.QueryAuthorsLimit = queryAuthorsLimit
-	}
-	if b.QueryKindsLimit == 0 {
-		b.QueryKindsLimit = queryKindsLimit
-	}
-	if b.QueryTagsLimit == 0 {
-		b.QueryTagsLimit = queryTagsLimit
-	}
-	return err
-}

plugins/storage/postgresql/postgresql.go

@@ -1,15 +0,0 @@
-package postgresql
-
-import (
-	"github.com/jmoiron/sqlx"
-)
-
-type PostgresBackend struct {
-	*sqlx.DB
-	DatabaseURL       string
-	QueryLimit        int
-	QueryIDsLimit     int
-	QueryAuthorsLimit int
-	QueryKindsLimit   int
-	QueryTagsLimit    int
-}

plugins/storage/postgresql/query.go

@@ -1,193 +0,0 @@
-package postgresql
-
-import (
-	"context"
-	"database/sql"
-	"encoding/hex"
-	"fmt"
-	"strconv"
-	"strings"
-
-	"github.com/jmoiron/sqlx"
-	"github.com/nbd-wtf/go-nostr"
-)
-
-func (b PostgresBackend) QueryEvents(ctx context.Context, filter nostr.Filter) (ch chan *nostr.Event, err error) {
-	ch = make(chan *nostr.Event)
-
-	query, params, err := b.queryEventsSql(filter, false)
-	if err != nil {
-		return nil, err
-	}
-
-	rows, err := b.DB.Query(query, params...)
-	if err != nil && err != sql.ErrNoRows {
-		return nil, fmt.Errorf("failed to fetch events using query %q: %w", query, err)
-	}
-
-	go func() {
-		defer rows.Close()
-		defer close(ch)
-		for rows.Next() {
-			var evt nostr.Event
-			var timestamp int64
-			err := rows.Scan(&evt.ID, &evt.PubKey, &timestamp,
-				&evt.Kind, &evt.Tags, &evt.Content, &evt.Sig)
-			if err != nil {
-				return
-			}
-			evt.CreatedAt = nostr.Timestamp(timestamp)
-			ch <- &evt
-		}
-	}()
-
-	return ch, nil
-}
-
-func (b PostgresBackend) CountEvents(ctx context.Context, filter nostr.Filter) (int64, error) {
-	query, params, err := b.queryEventsSql(filter, true)
-	if err != nil {
-		return 0, err
-	}
-
-	var count int64
-	if err = b.DB.QueryRow(query, params...).Scan(&count); err != nil && err != sql.ErrNoRows {
-		return 0, fmt.Errorf("failed to fetch events using query %q: %w", query, err)
-	}
-	return count, nil
-}
-
-func (b PostgresBackend) queryEventsSql(filter nostr.Filter, doCount bool) (string, []any, error) {
-	var conditions []string
-	var params []any
-
-	if filter.IDs != nil {
-		if len(filter.IDs) > b.QueryIDsLimit {
-			// too many ids, fail everything
-			return "", nil, nil
-		}
-
-		likeids := make([]string, 0, len(filter.IDs))
-		for _, id := range filter.IDs {
-			// to prevent sql attack here we will check if
-			// these ids are valid 32byte hex
-			parsed, err := hex.DecodeString(id)
-			if err != nil || len(parsed) != 32 {
-				continue
-			}
-			likeids = append(likeids, fmt.Sprintf("id LIKE '%x%%'", parsed))
-		}
-		if len(likeids) == 0 {
-			// ids being [] mean you won't get anything
-			return "", nil, nil
-		}
-		conditions = append(conditions, "("+strings.Join(likeids, " OR ")+")")
-	}
-
-	if filter.Authors != nil {
-		if len(filter.Authors) > b.QueryAuthorsLimit {
-			// too many authors, fail everything
-			return "", nil, nil
-		}
-
-		likekeys := make([]string, 0, len(filter.Authors))
-		for _, key := range filter.Authors {
-			// to prevent sql attack here we will check if
-			// these keys are valid 32byte hex
-			parsed, err := hex.DecodeString(key)
-			if err != nil || len(parsed) != 32 {
-				continue
-			}
-			likekeys = append(likekeys, fmt.Sprintf("pubkey LIKE '%x%%'", parsed))
-		}
-		if len(likekeys) == 0 {
-			// authors being [] mean you won't get anything
-			return "", nil, nil
-		}
-		conditions = append(conditions, "("+strings.Join(likekeys, " OR ")+")")
-	}
-
-	if filter.Kinds != nil {
-		if len(filter.Kinds) > b.QueryKindsLimit {
-			// too many kinds, fail everything
-			return "", nil, nil
-		}
-
-		if len(filter.Kinds) == 0 {
-			// kinds being [] mean you won't get anything
-			return "", nil, nil
-		}
-		// no sql injection issues since these are ints
-		inkinds := make([]string, len(filter.Kinds))
-		for i, kind := range filter.Kinds {
-			inkinds[i] = strconv.Itoa(kind)
-		}
-		conditions = append(conditions, `kind IN (`+strings.Join(inkinds, ",")+`)`)
-	}
-
-	tagQuery := make([]string, 0, 1)
-	for _, values := range filter.Tags {
-		if len(values) == 0 {
-			// any tag set to [] is wrong
-			return "", nil, nil
-		}
-
-		// add these tags to the query
-		tagQuery = append(tagQuery, values...)
-
-		if len(tagQuery) > b.QueryTagsLimit {
-			// too many tags, fail everything
-			return "", nil, nil
-		}
-	}
-
-	if len(tagQuery) > 0 {
-		arrayBuild := make([]string, len(tagQuery))
-		for i, tagValue := range tagQuery {
-			arrayBuild[i] = "?"
-			params = append(params, tagValue)
-		}
-
-		// we use a very bad implementation in which we only check the tag values and
-		// ignore the tag names
-		conditions = append(conditions,
-			"tagvalues && ARRAY["+strings.Join(arrayBuild, ",")+"]")
-	}
-
-	if filter.Since != nil {
-		conditions = append(conditions, "created_at > ?")
-		params = append(params, filter.Since)
-	}
-	if filter.Until != nil {
-		conditions = append(conditions, "created_at < ?")
-		params = append(params, filter.Until)
-	}
-
-	if len(conditions) == 0 {
-		// fallback
-		conditions = append(conditions, "true")
-	}
-
-	if filter.Limit < 1 || filter.Limit > b.QueryLimit {
-		params = append(params, b.QueryLimit)
-	} else {
-		params = append(params, filter.Limit)
-	}
-
-	var query string
-	if doCount {
-		query = sqlx.Rebind(sqlx.BindType("postgres"), `SELECT
-          COUNT(*)
-        FROM event WHERE `+
-			strings.Join(conditions, " AND ")+
-			" ORDER BY created_at DESC LIMIT ?")
-	} else {
-		query = sqlx.Rebind(sqlx.BindType("postgres"), `SELECT
-          id, pubkey, created_at, kind, tags, content, sig
-        FROM event WHERE `+
-			strings.Join(conditions, " AND ")+
-			" ORDER BY created_at DESC LIMIT ?")
-	}
-
-	return query, params, nil
-}

plugins/storage/postgresql/query_test.go

@@ -1,405 +0,0 @@
-package postgresql
-
-import (
-	"fmt"
-	"strconv"
-	"strings"
-	"testing"
-
-	"github.com/nbd-wtf/go-nostr"
-	"github.com/stretchr/testify/assert"
-)
-
-var defaultBackend = PostgresBackend{
-	QueryLimit:        queryLimit,
-	QueryIDsLimit:     queryIDsLimit,
-	QueryAuthorsLimit: queryAuthorsLimit,
-	QueryKindsLimit:   queryKindsLimit,
-	QueryTagsLimit:    queryTagsLimit,
-}
-
-func TestQueryEventsSql(t *testing.T) {
-	var tests = []struct {
-		name    string
-		backend PostgresBackend
-		filter  *nostr.Filter
-		query   string
-		params  []any
-		err     error
-	}{
-		{
-			name:    "empty filter",
-			backend: defaultBackend,
-			filter:  &nostr.Filter{},
-			query:   "SELECT id, pubkey, created_at, kind, tags, content, sig FROM event WHERE true ORDER BY created_at DESC LIMIT $1",
-			params:  []any{100},
-			err:     nil,
-		},
-		{
-			name:    "valid filter limit",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				Limit: 50,
-			},
-			query:  "SELECT id, pubkey, created_at, kind, tags, content, sig FROM event WHERE true ORDER BY created_at DESC LIMIT $1",
-			params: []any{50},
-			err:    nil,
-		},
-		{
-			name:    "too large filter limit",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				Limit: 2000,
-			},
-			query:  "SELECT id, pubkey, created_at, kind, tags, content, sig FROM event WHERE true ORDER BY created_at DESC LIMIT $1",
-			params: []any{100},
-			err:    nil,
-		},
-		{
-			name:    "ids filter",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				IDs: []string{"083ec57f36a7b39ab98a57bedab4f85355b2ee89e4b205bed58d7c3ef9edd294"},
-			},
-			query: `SELECT id, pubkey, created_at, kind, tags, content, sig 
-			FROM event 
-			WHERE (id LIKE '083ec57f36a7b39ab98a57bedab4f85355b2ee89e4b205bed58d7c3ef9edd294%') 
-			ORDER BY created_at DESC LIMIT $1`,
-			params: []any{100},
-			err:    nil,
-		},
-		{
-			name:    "kind filter",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				Kinds: []int{1, 2, 3},
-			},
-			query: `SELECT id, pubkey, created_at, kind, tags, content, sig 
-			FROM event 
-			WHERE kind IN(1,2,3) 
-			ORDER BY created_at DESC LIMIT $1`,
-			params: []any{100},
-			err:    nil,
-		},
-		{
-			name:    "authors filter",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				Authors: []string{"7bdef7bdebb8721f77927d0e77c66059360fa62371fdf15f3add93923a613229"},
-			},
-			query: `SELECT id, pubkey, created_at, kind, tags, content, sig 
-			FROM event 
-			WHERE (pubkey LIKE '7bdef7bdebb8721f77927d0e77c66059360fa62371fdf15f3add93923a613229%') 
-			ORDER BY created_at DESC LIMIT $1`,
-			params: []any{100},
-			err:    nil,
-		},
-		// errors
-		{
-			name:    "nil filter",
-			backend: defaultBackend,
-			filter:  nil,
-			query:   "",
-			params:  nil,
-			err:     fmt.Errorf("filter cannot be null"),
-		},
-		{
-			name:    "too many ids",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				IDs: strSlice(501),
-			},
-			query:  "",
-			params: nil,
-			// REVIEW: should return error
-			err: nil,
-		},
-		{
-			name:    "invalid ids",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				IDs: []string{"stuff"},
-			},
-			query:  "",
-			params: nil,
-			// REVIEW: should return error
-			err: nil,
-		},
-		{
-			name:    "too many authors",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				Authors: strSlice(501),
-			},
-			query:  "",
-			params: nil,
-			// REVIEW: should return error
-			err: nil,
-		},
-		{
-			name:    "invalid authors",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				Authors: []string{"stuff"},
-			},
-			query:  "",
-			params: nil,
-			// REVIEW: should return error
-			err: nil,
-		},
-		{
-			name:    "too many kinds",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				Kinds: intSlice(11),
-			},
-			query:  "",
-			params: nil,
-			// REVIEW: should return error
-			err: nil,
-		},
-		{
-			name:    "no kinds",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				Kinds: []int{},
-			},
-			query:  "",
-			params: nil,
-			// REVIEW: should return error
-			err: nil,
-		},
-		{
-			name:    "tags of empty array",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				Tags: nostr.TagMap{
-					"#e": []string{},
-				},
-			},
-			query:  "",
-			params: nil,
-			// REVIEW: should return error
-			err: nil,
-		},
-		{
-			name:    "too many tag values",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				Tags: nostr.TagMap{
-					"#e": strSlice(11),
-				},
-			},
-			query:  "",
-			params: nil,
-			// REVIEW: should return error
-			err: nil,
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			query, params, err := tt.backend.queryEventsSql(tt.filter, false)
-			assert.Equal(t, tt.err, err)
-			if err != nil {
-				return
-			}
-
-			assert.Equal(t, clean(tt.query), clean(query))
-			assert.Equal(t, tt.params, params)
-		})
-	}
-}
-
-func clean(s string) string {
-	return strings.ReplaceAll(strings.ReplaceAll(strings.ReplaceAll(s, "\t", ""), "\n", ""), " ", "")
-}
-
-func intSlice(n int) []int {
-	slice := make([]int, 0, n)
-	for i := 0; i < n; i++ {
-		slice = append(slice, i)
-	}
-	return slice
-}
-
-func strSlice(n int) []string {
-	slice := make([]string, 0, n)
-	for i := 0; i < n; i++ {
-		slice = append(slice, strconv.Itoa(i))
-	}
-	return slice
-}
-
-func TestCountEventsSql(t *testing.T) {
-	var tests = []struct {
-		name    string
-		backend PostgresBackend
-		filter  *nostr.Filter
-		query   string
-		params  []any
-		err     error
-	}{
-		{
-			name:    "empty filter",
-			backend: defaultBackend,
-			filter:  &nostr.Filter{},
-			query:   "SELECT COUNT(*) FROM event WHERE true ORDER BY created_at DESC LIMIT $1",
-			params:  []any{100},
-			err:     nil,
-		},
-		{
-			name:    "ids filter",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				IDs: []string{"083ec57f36a7b39ab98a57bedab4f85355b2ee89e4b205bed58d7c3ef9edd294"},
-			},
-			query: `SELECT COUNT(*)
-			FROM event 
-			WHERE (id LIKE '083ec57f36a7b39ab98a57bedab4f85355b2ee89e4b205bed58d7c3ef9edd294%') 
-			ORDER BY created_at DESC LIMIT $1`,
-			params: []any{100},
-			err:    nil,
-		},
-		{
-			name:    "kind filter",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				Kinds: []int{1, 2, 3},
-			},
-			query: `SELECT COUNT(*)
-			FROM event 
-			WHERE kind IN(1,2,3) 
-			ORDER BY created_at DESC LIMIT $1`,
-			params: []any{100},
-			err:    nil,
-		},
-		{
-			name:    "authors filter",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				Authors: []string{"7bdef7bdebb8721f77927d0e77c66059360fa62371fdf15f3add93923a613229"},
-			},
-			query: `SELECT COUNT(*)
-			FROM event 
-			WHERE (pubkey LIKE '7bdef7bdebb8721f77927d0e77c66059360fa62371fdf15f3add93923a613229%') 
-			ORDER BY created_at DESC LIMIT $1`,
-			params: []any{100},
-			err:    nil,
-		},
-		// errors
-		{
-			name:    "nil filter",
-			backend: defaultBackend,
-			filter:  nil,
-			query:   "",
-			params:  nil,
-			err:     fmt.Errorf("filter cannot be null"),
-		},
-		{
-			name:    "too many ids",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				IDs: strSlice(501),
-			},
-			query:  "",
-			params: nil,
-			// REVIEW: should return error
-			err: nil,
-		},
-		{
-			name:    "invalid ids",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				IDs: []string{"stuff"},
-			},
-			query:  "",
-			params: nil,
-			// REVIEW: should return error
-			err: nil,
-		},
-		{
-			name:    "too many authors",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				Authors: strSlice(501),
-			},
-			query:  "",
-			params: nil,
-			// REVIEW: should return error
-			err: nil,
-		},
-		{
-			name:    "invalid authors",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				Authors: []string{"stuff"},
-			},
-			query:  "",
-			params: nil,
-			// REVIEW: should return error
-			err: nil,
-		},
-		{
-			name:    "too many kinds",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				Kinds: intSlice(11),
-			},
-			query:  "",
-			params: nil,
-			// REVIEW: should return error
-			err: nil,
-		},
-		{
-			name:    "no kinds",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				Kinds: []int{},
-			},
-			query:  "",
-			params: nil,
-			// REVIEW: should return error
-			err: nil,
-		},
-		{
-			name:    "tags of empty array",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				Tags: nostr.TagMap{
-					"#e": []string{},
-				},
-			},
-			query:  "",
-			params: nil,
-			// REVIEW: should return error
-			err: nil,
-		},
-		{
-			name:    "too many tag values",
-			backend: defaultBackend,
-			filter: &nostr.Filter{
-				Tags: nostr.TagMap{
-					"#e": strSlice(11),
-				},
-			},
-			query:  "",
-			params: nil,
-			// REVIEW: should return error
-			err: nil,
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			query, params, err := tt.backend.queryEventsSql(tt.filter, true)
-			assert.Equal(t, tt.err, err)
-			if err != nil {
-				return
-			}
-
-			assert.Equal(t, clean(tt.query), clean(query))
-			assert.Equal(t, tt.params, params)
-		})
-	}
-}

plugins/storage/postgresql/save.go

@@ -1,54 +0,0 @@
-package postgresql
-
-import (
-	"context"
-	"encoding/json"
-
-	"github.com/fiatjaf/khatru"
-	"github.com/nbd-wtf/go-nostr"
-)
-
-func (b *PostgresBackend) SaveEvent(ctx context.Context, evt *nostr.Event) error {
-	sql, params, _ := saveEventSql(evt)
-	res, err := b.DB.ExecContext(ctx, sql, params...)
-	if err != nil {
-		return err
-	}
-
-	nr, err := res.RowsAffected()
-	if err != nil {
-		return err
-	}
-
-	if nr == 0 {
-		return khatru.ErrDupEvent
-	}
-
-	return nil
-}
-
-func (b *PostgresBackend) BeforeSave(ctx context.Context, evt *nostr.Event) {
-	// do nothing
-}
-
-func (b *PostgresBackend) AfterSave(evt *nostr.Event) {
-	// delete all but the 100 most recent ones for each key
-	b.DB.Exec(`DELETE FROM event WHERE pubkey = $1 AND kind = $2 AND created_at < (
-      SELECT created_at FROM event WHERE pubkey = $1
-      ORDER BY created_at DESC OFFSET 100 LIMIT 1
-    )`, evt.PubKey, evt.Kind)
-}
-
-func saveEventSql(evt *nostr.Event) (string, []any, error) {
-	const query = `INSERT INTO event (
-	id, pubkey, created_at, kind, tags, content, sig)
-	VALUES ($1, $2, $3, $4, $5, $6, $7)
-	ON CONFLICT (id) DO NOTHING`
-
-	var (
-		tagsj, _ = json.Marshal(evt.Tags)
-		params   = []any{evt.ID, evt.PubKey, evt.CreatedAt, evt.Kind, tagsj, evt.Content, evt.Sig}
-	)
-
-	return query, params, nil
-}

plugins/storage/postgresql/save_test.go

@@ -1,64 +0,0 @@
-package postgresql
-
-import (
-	"testing"
-
-	"github.com/nbd-wtf/go-nostr"
-	"github.com/stretchr/testify/assert"
-)
-
-func TestSaveEventSql(t *testing.T) {
-	now := nostr.Now()
-	tests := []struct {
-		name   string
-		event  *nostr.Event
-		query  string
-		params []any
-		err    error
-	}{
-		{
-			name: "basic",
-			event: &nostr.Event{
-				ID:        "id",
-				PubKey:    "pk",
-				CreatedAt: now,
-				Kind:      nostr.KindTextNote,
-				Content:   "test",
-				Sig:       "sig",
-			},
-			query: `INSERT INTO event (
-	id, pubkey, created_at, kind, tags, content, sig)
-	VALUES ($1, $2, $3, $4, $5, $6, $7)
-	ON CONFLICT (id) DO NOTHING`,
-			params: []any{"id", "pk", now, nostr.KindTextNote, []byte("null"), "test", "sig"},
-			err:    nil,
-		},
-		{
-			name: "tags",
-			event: &nostr.Event{
-				ID:        "id",
-				PubKey:    "pk",
-				CreatedAt: now,
-				Kind:      nostr.KindTextNote,
-				Tags:      nostr.Tags{nostr.Tag{"foo", "bar"}},
-				Content:   "test",
-				Sig:       "sig",
-			},
-			query: `INSERT INTO event (
-	id, pubkey, created_at, kind, tags, content, sig)
-	VALUES ($1, $2, $3, $4, $5, $6, $7)
-	ON CONFLICT (id) DO NOTHING`,
-			params: []any{"id", "pk", now, nostr.KindTextNote, []byte("[[\"foo\",\"bar\"]]"), "test", "sig"},
-			err:    nil,
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			query, params, err := saveEventSql(tt.event)
-			assert.Equal(t, clean(tt.query), clean(query))
-			assert.Equal(t, tt.params, params)
-			assert.Equal(t, tt.err, err)
-		})
-	}
-}

plugins/storage/sqlite3/delete.go

@@ -1,12 +0,0 @@
-package sqlite3
-
-import (
-	"context"
-
-	"github.com/nbd-wtf/go-nostr"
-)
-
-func (b SQLite3Backend) DeleteEvent(ctx context.Context, evt *nostr.Event) error {
-	_, err := b.DB.ExecContext(ctx, "DELETE FROM event WHERE id = $1", evt.ID)
-	return err
-}

plugins/storage/sqlite3/init.go

@@ -1,33 +0,0 @@
-package sqlite3
-
-import (
-	"github.com/jmoiron/sqlx"
-	"github.com/jmoiron/sqlx/reflectx"
-	_ "github.com/mattn/go-sqlite3"
-)
-
-func (b *SQLite3Backend) Init() error {
-	db, err := sqlx.Connect("sqlite3", b.DatabaseURL)
-	if err != nil {
-		return err
-	}
-
-	// sqlx default is 0 (unlimited), while sqlite3 by default accepts up to 100 connections
-	db.SetMaxOpenConns(80)
-
-	db.Mapper = reflectx.NewMapperFunc("json", sqlx.NameMapper)
-	b.DB = db
-
-	_, err = b.DB.Exec(`
-CREATE TABLE IF NOT EXISTS event (
-  id text NOT NULL,
-  pubkey text NOT NULL,
-  created_at integer NOT NULL,
-  kind integer NOT NULL,
-  tags jsonb NOT NULL,
-  content text NOT NULL,
-  sig text NOT NULL
-);
-    `)
-	return err
-}

plugins/storage/sqlite3/query.go

@@ -1,192 +0,0 @@
-package sqlite3
-
-import (
-	"context"
-	"database/sql"
-	"encoding/hex"
-	"fmt"
-	"strconv"
-	"strings"
-
-	"github.com/jmoiron/sqlx"
-	"github.com/nbd-wtf/go-nostr"
-)
-
-func (b SQLite3Backend) QueryEvents(ctx context.Context, filter nostr.Filter) (ch chan *nostr.Event, err error) {
-	ch = make(chan *nostr.Event)
-
-	query, params, err := queryEventsSql(filter, false)
-	if err != nil {
-		return nil, err
-	}
-
-	rows, err := b.DB.Query(query, params...)
-	if err != nil && err != sql.ErrNoRows {
-		return nil, fmt.Errorf("failed to fetch events using query %q: %w", query, err)
-	}
-
-	go func() {
-		defer rows.Close()
-		defer close(ch)
-		for rows.Next() {
-			var evt nostr.Event
-			var timestamp int64
-			err := rows.Scan(&evt.ID, &evt.PubKey, &timestamp,
-				&evt.Kind, &evt.Tags, &evt.Content, &evt.Sig)
-			if err != nil {
-				return
-			}
-			evt.CreatedAt = nostr.Timestamp(timestamp)
-			ch <- &evt
-		}
-	}()
-
-	return ch, nil
-}
-
-func (b SQLite3Backend) CountEvents(ctx context.Context, filter nostr.Filter) (int64, error) {
-	query, params, err := queryEventsSql(filter, true)
-	if err != nil {
-		return 0, err
-	}
-
-	var count int64
-	err = b.DB.QueryRow(query, params...).Scan(&count)
-	if err != nil && err != sql.ErrNoRows {
-		return 0, fmt.Errorf("failed to fetch events using query %q: %w", query, err)
-	}
-	return count, nil
-}
-
-func queryEventsSql(filter nostr.Filter, doCount bool) (string, []any, error) {
-	var conditions []string
-	var params []any
-
-	if filter.IDs != nil {
-		if len(filter.IDs) > 500 {
-			// too many ids, fail everything
-			return "", nil, nil
-		}
-
-		likeids := make([]string, 0, len(filter.IDs))
-		for _, id := range filter.IDs {
-			// to prevent sql attack here we will check if
-			// these ids are valid 32byte hex
-			parsed, err := hex.DecodeString(id)
-			if err != nil || len(parsed) != 32 {
-				continue
-			}
-			likeids = append(likeids, fmt.Sprintf("id LIKE '%x%%'", parsed))
-		}
-		if len(likeids) == 0 {
-			// ids being [] mean you won't get anything
-			return "", nil, nil
-		}
-		conditions = append(conditions, "("+strings.Join(likeids, " OR ")+")")
-	}
-
-	if filter.Authors != nil {
-		if len(filter.Authors) > 500 {
-			// too many authors, fail everything
-			return "", nil, nil
-		}
-
-		likekeys := make([]string, 0, len(filter.Authors))
-		for _, key := range filter.Authors {
-			// to prevent sql attack here we will check if
-			// these keys are valid 32byte hex
-			parsed, err := hex.DecodeString(key)
-			if err != nil || len(parsed) != 32 {
-				continue
-			}
-			likekeys = append(likekeys, fmt.Sprintf("pubkey LIKE '%x%%'", parsed))
-		}
-		if len(likekeys) == 0 {
-			// authors being [] mean you won't get anything
-			return "", nil, nil
-		}
-		conditions = append(conditions, "("+strings.Join(likekeys, " OR ")+")")
-	}
-
-	if filter.Kinds != nil {
-		if len(filter.Kinds) > 10 {
-			// too many kinds, fail everything
-			return "", nil, nil
-		}
-
-		if len(filter.Kinds) == 0 {
-			// kinds being [] mean you won't get anything
-			return "", nil, nil
-		}
-		// no sql injection issues since these are ints
-		inkinds := make([]string, len(filter.Kinds))
-		for i, kind := range filter.Kinds {
-			inkinds[i] = strconv.Itoa(kind)
-		}
-		conditions = append(conditions, `kind IN (`+strings.Join(inkinds, ",")+`)`)
-	}
-
-	tagQuery := make([]string, 0, 1)
-	for _, values := range filter.Tags {
-		if len(values) == 0 {
-			// any tag set to [] is wrong
-			return "", nil, nil
-		}
-
-		// add these tags to the query
-		tagQuery = append(tagQuery, values...)
-
-		if len(tagQuery) > 10 {
-			// too many tags, fail everything
-			return "", nil, nil
-		}
-	}
-
-	// we use a very bad implementation in which we only check the tag values and
-	// ignore the tag names
-	for _, tagValue := range tagQuery {
-		params = append(params, "%"+tagValue+"%")
-		conditions = append(conditions, "tags LIKE ?")
-	}
-
-	if filter.Since != nil {
-		conditions = append(conditions, "created_at > ?")
-		params = append(params, filter.Since)
-	}
-	if filter.Until != nil {
-		conditions = append(conditions, "created_at < ?")
-		params = append(params, filter.Until)
-	}
-	if filter.Search != "" {
-		conditions = append(conditions, "content LIKE ?")
-		params = append(params, "%"+filter.Search+"%")
-	}
-
-	if len(conditions) == 0 {
-		// fallback
-		conditions = append(conditions, "true")
-	}
-
-	if filter.Limit < 1 || filter.Limit > 100 {
-		params = append(params, 100)
-	} else {
-		params = append(params, filter.Limit)
-	}
-
-	var query string
-	if doCount {
-		query = sqlx.Rebind(sqlx.BindType("sqlite3"), `SELECT
-          COUNT(*)
-        FROM event WHERE `+
-			strings.Join(conditions, " AND ")+
-			" ORDER BY created_at DESC LIMIT ?")
-	} else {
-		query = sqlx.Rebind(sqlx.BindType("sqlite3"), `SELECT
-          id, pubkey, created_at, kind, tags, content, sig
-        FROM event WHERE `+
-			strings.Join(conditions, " AND ")+
-			" ORDER BY created_at DESC LIMIT ?")
-	}
-
-	return query, params, nil
-}

plugins/storage/sqlite3/save.go

@@ -1,44 +0,0 @@
-package sqlite3
-
-import (
-	"context"
-	"encoding/json"
-
-	"github.com/fiatjaf/khatru"
-	"github.com/nbd-wtf/go-nostr"
-)
-
-func (b *SQLite3Backend) SaveEvent(ctx context.Context, evt *nostr.Event) error {
-	// insert
-	tagsj, _ := json.Marshal(evt.Tags)
-	res, err := b.DB.ExecContext(ctx, `
-        INSERT INTO event (id, pubkey, created_at, kind, tags, content, sig)
-        VALUES ($1, $2, $3, $4, $5, $6, $7)
-    `, evt.ID, evt.PubKey, evt.CreatedAt, evt.Kind, tagsj, evt.Content, evt.Sig)
-	if err != nil {
-		return err
-	}
-
-	nr, err := res.RowsAffected()
-	if err != nil {
-		return err
-	}
-
-	if nr == 0 {
-		return khatru.ErrDupEvent
-	}
-
-	return nil
-}
-
-func (b *SQLite3Backend) BeforeSave(ctx context.Context, evt *nostr.Event) {
-	// do nothing
-}
-
-func (b *SQLite3Backend) AfterSave(evt *nostr.Event) {
-	// delete all but the 100 most recent ones for each key
-	b.DB.Exec(`DELETE FROM event WHERE pubkey = $1 AND kind = $2 AND created_at < (
-      SELECT created_at FROM event WHERE pubkey = $1
-      ORDER BY created_at DESC OFFSET 100 LIMIT 1
-    )`, evt.PubKey, evt.Kind)
-}

plugins/storage/sqlite3/sqlite3.go

@@ -1,10 +0,0 @@
-package sqlite3
-
-import (
-	"github.com/jmoiron/sqlx"
-)
-
-type SQLite3Backend struct {
-	*sqlx.DB
-	DatabaseURL string
-}

policies/events.go

@@ -0,0 +1,110 @@
+package policies
+
+import (
+	"context"
+
+	"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
+// events with more indexable (single-character) tags than the specified number.
+//
+// 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) {
+	ignore := func(kind int) bool { return false }
+	if len(ignoreKinds) > 0 {
+		ignore = func(kind int) bool {
+			_, isIgnored := slices.BinarySearch(ignoreKinds, kind)
+			return isIgnored
+		}
+	}
+	if len(onlyKinds) > 0 {
+		ignore = func(kind int) bool {
+			_, isApplicable := slices.BinarySearch(onlyKinds, kind)
+			return !isApplicable
+		}
+	}
+
+	return func(ctx context.Context, event *nostr.Event) (reject bool, msg string) {
+		if ignore(event.Kind) {
+			return false, ""
+		}
+
+		ntags := 0
+		for _, tag := range event.Tags {
+			if len(tag) > 0 && len(tag[0]) == 1 {
+				ntags++
+			}
+		}
+		if ntags > max {
+			return true, "too many indexable tags"
+		}
+		return false, ""
+	}
+}
+
+// PreventLargeTags rejects events that have indexable tag values greater than maxTagValueLen.
+func PreventLargeTags(maxTagValueLen int) func(context.Context, *nostr.Event) (bool, string) {
+	return func(ctx context.Context, event *nostr.Event) (reject bool, msg string) {
+		for _, tag := range event.Tags {
+			if len(tag) > 1 && len(tag[0]) == 1 {
+				if len(tag[1]) > maxTagValueLen {
+					return true, "event contains too large tags"
+				}
+			}
+		}
+		return false, ""
+	}
+}
+
+// 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) {
+	max := 0
+	min := 0
+	for _, kind := range kinds {
+		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) {
+		// 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"
+		}
+
+		// hopefully this map of uint16s is very fast
+		if _, allowed := slices.BinarySearch(kinds, uint16(event.Kind)); allowed {
+			return false, ""
+		}
+		return true, "event kind not allowed"
+	}
+}
+
+func PreventTimestampsInThePast(thresholdSeconds nostr.Timestamp) func(context.Context, *nostr.Event) (bool, string) {
+	return func(ctx context.Context, event *nostr.Event) (reject bool, msg string) {
+		if nostr.Now()-event.CreatedAt > thresholdSeconds {
+			return true, "event too old"
+		}
+		return false, ""
+	}
+}
+
+func PreventTimestampsInTheFuture(thresholdSeconds nostr.Timestamp) func(context.Context, *nostr.Event) (bool, string) {
+	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"
+		}
+		return false, ""
+	}
+}

policies/filters.go

@@ -0,0 +1,73 @@
+package policies
+
+import (
+	"context"
+
+	"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)
+
+	if items > 4 && len(filter.Tags) > 2 {
+		return true, "too many things to filter for"
+	}
+
+	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 {
+		c += len(tagItems)
+	}
+	if c == 0 {
+		return true, "can't handle empty filters"
+	}
+	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"
+	}
+	return false, ""
+}
+
+func RemoveSearchQueries(ctx context.Context, filter *nostr.Filter) {
+	filter.Search = ""
+}
+
+func RemoveAllButKinds(kinds ...uint16) func(context.Context, *nostr.Filter) {
+	return func(ctx context.Context, filter *nostr.Filter) {
+		if n := len(filter.Kinds); n > 0 {
+			newKinds := make([]int, 0, n)
+			for i := 0; i < n; i++ {
+				if k := filter.Kinds[i]; slices.Contains(kinds, uint16(k)) {
+					newKinds = append(newKinds, k)
+				}
+			}
+			filter.Kinds = newKinds
+		}
+	}
+}
+
+func RemoveAllButTags(tagNames ...string) func(context.Context, *nostr.Filter) {
+	return func(ctx context.Context, filter *nostr.Filter) {
+		for tagName := range filter.Tags {
+			if !slices.Contains(tagNames, tagName) {
+				delete(filter.Tags, tagName)
+			}
+		}
+	}
+}

policies/nip04.go

@@ -1,4 +1,4 @@
-package plugins
+package policies
 
 import (
 	"context"
@@ -8,7 +8,8 @@ import (
 	"golang.org/x/exp/slices"
 )
 
-func rejectKind04Snoopers(ctx context.Context, filter nostr.Filter) (bool, string) {
+// RejectKind04Snoopers prevents reading NIP-04 messages from people not involved in the conversation.
+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) {
@@ -19,13 +20,13 @@ func rejectKind04Snoopers(ctx context.Context, filter nostr.Filter) (bool, strin
 	senders := filter.Authors
 	receivers, _ := filter.Tags["p"]
 	switch {
-	case ws.Authed == "":
+	case ws.AuthedPublicKey == "":
 		// 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.Authed):
+	case len(senders) == 1 && len(receivers) < 2 && (senders[0] == ws.AuthedPublicKey):
 		// 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.Authed):
+	case len(receivers) == 1 && len(senders) < 2 && (receivers[0] == ws.AuthedPublicKey):
 		// allowed filter: ws.authed is sole receiver (filter specifies one or all senders)
 		return false, ""
 	default:

relay.go

@@ -17,6 +17,12 @@ func NewRelay() *Relay {
 	return &Relay{
 		Log: log.New(os.Stderr, "[khatru-relay] ", log.LstdFlags),
 
+		Info: &nip11.RelayInformationDocument{
+			Software:      "https://github.com/fiatjaf/khatru",
+			Version:       "n/a",
+			SupportedNIPs: make([]int, 0),
+		},
+
 		upgrader: websocket.Upgrader{
 			ReadBufferSize:  1024,
 			WriteBufferSize: 1024,
@@ -34,24 +40,27 @@ func NewRelay() *Relay {
 }
 
 type Relay struct {
-	Name        string
-	Description string
-	PubKey      string
-	Contact     string
-	ServiceURL  string // required for nip-42
+	ServiceURL string
 
-	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)
-	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)
-	EditInformation          []func(ctx context.Context, info *nip11.RelayInformationDocument)
-	OnAuth                   []func(ctx context.Context, pubkey string)
-	OnConnect                []func(ctx context.Context)
-	OnEventSaved             []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)
+	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)
+	OnAuth                    []func(ctx context.Context, pubkey string)
+	OnConnect                 []func(ctx context.Context)
+	OnDisconnect              []func(ctx context.Context)
+	OnEventSaved              []func(ctx context.Context, event *nostr.Event)
+
+	// editing info will affect
+	Info *nip11.RelayInformationDocument
 
 	// Default logger, as set by NewServer, is a stdlib logger prefixed with "[khatru-relay] ",
 	// outputting to stderr.
@@ -74,8 +83,3 @@ 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

@@ -0,0 +1,85 @@
+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 {
+	defer eose.Done()
+
+	// overwrite the filter (for example, to eliminate some kinds or
+	// that we know we don't support)
+	for _, ovw := range rl.OverwriteFilter {
+		ovw(ctx, &filter)
+	}
+
+	if filter.Limit < 0 {
+		return errors.New("blocked: filter invalidated")
+	}
+
+	// then check if we'll reject this filter (we apply this after overwriting
+	// because we may, for example, remove some things from the incoming filters
+	// that we know we don't support, and then if the end result is an empty
+	// filter we can just reject it)
+	for _, reject := range rl.RejectFilter {
+		if reject, msg := reject(ctx, filter); reject {
+			ws.WriteJSON(nostr.NoticeEnvelope(msg))
+			return errors.New(nostr.NormalizeOKMessage(msg, "blocked"))
+		}
+	}
+
+	// run the functions to query events (generally just one,
+	// but we might be fetching stuff from multiple places)
+	eose.Add(len(rl.QueryEvents))
+	for _, query := range rl.QueryEvents {
+		ch, err := query(ctx, filter)
+		if err != nil {
+			ws.WriteJSON(nostr.NoticeEnvelope(err.Error()))
+			eose.Done()
+			continue
+		}
+
+		go func(ch chan *nostr.Event) {
+			for event := range ch {
+				for _, ovw := range rl.OverwriteResponseEvent {
+					ovw(ctx, event)
+				}
+				ws.WriteJSON(nostr.EventEnvelope{SubscriptionID: &id, Event: *event})
+			}
+			eose.Done()
+		}(ch)
+	}
+
+	return nil
+}
+
+func (rl *Relay) handleCountRequest(ctx context.Context, ws *WebSocket, filter nostr.Filter) int64 {
+	// overwrite the filter (for example, to eliminate some kinds or tags that we know we don't support)
+	for _, ovw := range rl.OverwriteCountFilter {
+		ovw(ctx, &filter)
+	}
+
+	// then check if we'll reject this filter
+	for _, reject := range rl.RejectCountFilter {
+		if rejecting, msg := reject(ctx, filter); rejecting {
+			ws.WriteJSON(nostr.NoticeEnvelope(msg))
+			return 0
+		}
+	}
+
+	// run the functions to count (generally it will be just one)
+	var subtotal int64 = 0
+	for _, count := range rl.CountEvents {
+		res, err := count(ctx, filter)
+		if err != nil {
+			ws.WriteJSON(nostr.NoticeEnvelope(err.Error()))
+		}
+		subtotal += res
+	}
+
+	return subtotal
+}

start_test.go

@@ -1,93 +0,0 @@
-package khatru
-
-import (
-	"context"
-	"errors"
-	"net/http"
-	"testing"
-	"time"
-
-	"github.com/gobwas/ws/wsutil"
-	"github.com/nbd-wtf/go-nostr"
-)
-
-func TestServerStartShutdown(t *testing.T) {
-	var (
-		inited      bool
-		storeInited bool
-		shutdown    bool
-	)
-	rl := &testRelay{
-		name: "test server start",
-		init: func() error {
-			inited = true
-			return nil
-		},
-		onShutdown: func(context.Context) { shutdown = true },
-		storage: &testStorage{
-			init: func() error { storeInited = true; return nil },
-		},
-	}
-	srv, _ := NewServer(rl)
-	ready := make(chan bool)
-	done := make(chan error)
-	go func() { done <- srv.Start("127.0.0.1", 0, ready); close(done) }()
-	<-ready
-
-	// verify everything's initialized
-	if !inited {
-		t.Error("didn't call testRelay.init")
-	}
-	if !storeInited {
-		t.Error("didn't call testStorage.init")
-	}
-
-	// check that http requests are served
-	if _, err := http.Get("http://" + srv.Addr); err != nil {
-		t.Errorf("GET %s: %v", srv.Addr, err)
-	}
-
-	// verify server shuts down
-	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
-	defer cancel()
-	srv.Shutdown(ctx)
-	if !shutdown {
-		t.Error("didn't call testRelay.onShutdown")
-	}
-	select {
-	case err := <-done:
-		if err != nil {
-			t.Errorf("srv.Start: %v", err)
-		}
-	case <-time.After(time.Second):
-		t.Error("srv.Start too long to return")
-	}
-}
-
-func TestServerShutdownWebsocket(t *testing.T) {
-	// set up a new relay server
-	srv := startTestRelay(t, &testRelay{storage: &testStorage{}})
-
-	// connect a client to it
-	ctx1, cancel := context.WithTimeout(context.Background(), 2*time.Second)
-	defer cancel()
-	client, err := nostr.RelayConnect(ctx1, "ws://"+srv.Addr)
-	if err != nil {
-		t.Fatalf("nostr.RelayConnectContext: %v", err)
-	}
-
-	// now, shut down the server
-	ctx2, cancel := context.WithTimeout(context.Background(), 2*time.Second)
-	defer cancel()
-	srv.Shutdown(ctx2)
-
-	// wait for the client to receive a "connection close"
-	time.Sleep(1 * time.Second)
-	err = client.ConnectionError
-	if e := errors.Unwrap(err); e != nil {
-		err = e
-	}
-	if _, ok := err.(wsutil.ClosedError); !ok {
-		t.Errorf("client.ConnextionError: %v (%T); want wsutil.ClosedError", err, err)
-	}
-}

util_test.go

@@ -1,91 +0,0 @@
-package khatru
-
-import (
-	"context"
-	"testing"
-
-	"github.com/nbd-wtf/go-nostr"
-)
-
-func startTestRelay(t *testing.T, tr *testRelay) *Server {
-	t.Helper()
-	srv, _ := NewServer(tr)
-	started := make(chan bool)
-	go srv.Start("127.0.0.1", 0, started)
-	<-started
-	return srv
-}
-
-type testRelay struct {
-	name        string
-	storage     Storage
-	init        func() error
-	onShutdown  func(context.Context)
-	acceptEvent func(*nostr.Event) bool
-}
-
-func (tr *testRelay) Name() string                    { return tr.name }
-func (tr *testRelay) Storage(context.Context) Storage { return tr.storage }
-
-func (tr *testRelay) Init() error {
-	if fn := tr.init; fn != nil {
-		return fn()
-	}
-	return nil
-}
-
-func (tr *testRelay) OnShutdown(ctx context.Context) {
-	if fn := tr.onShutdown; fn != nil {
-		fn(ctx)
-	}
-}
-
-func (tr *testRelay) AcceptEvent(ctx context.Context, e *nostr.Event) bool {
-	if fn := tr.acceptEvent; fn != nil {
-		return fn(e)
-	}
-	return true
-}
-
-type testStorage struct {
-	init        func() error
-	queryEvents func(context.Context, *nostr.Filter) (chan *nostr.Event, error)
-	deleteEvent func(ctx context.Context, id string, pubkey string) error
-	saveEvent   func(context.Context, *nostr.Event) error
-	countEvents func(context.Context, *nostr.Filter) (int64, error)
-}
-
-func (st *testStorage) Init() error {
-	if fn := st.init; fn != nil {
-		return fn()
-	}
-	return nil
-}
-
-func (st *testStorage) QueryEvents(ctx context.Context, f *nostr.Filter) (chan *nostr.Event, error) {
-	if fn := st.queryEvents; fn != nil {
-		return fn(ctx, f)
-	}
-	return nil, nil
-}
-
-func (st *testStorage) DeleteEvent(ctx context.Context, id string, pubkey string) error {
-	if fn := st.deleteEvent; fn != nil {
-		return fn(ctx, id, pubkey)
-	}
-	return nil
-}
-
-func (st *testStorage) SaveEvent(ctx context.Context, e *nostr.Event) error {
-	if fn := st.saveEvent; fn != nil {
-		return fn(ctx, e)
-	}
-	return nil
-}
-
-func (st *testStorage) CountEvents(ctx context.Context, f *nostr.Filter) (int64, error) {
-	if fn := st.countEvents; fn != nil {
-		return fn(ctx, f)
-	}
-	return 0, nil
-}

utils.go

@@ -2,28 +2,45 @@ package khatru
 
 import (
 	"context"
-	"hash/maphash"
-	"regexp"
-	"unsafe"
+
+	"github.com/nbd-wtf/go-nostr"
+	"github.com/sebest/xff"
 )
 
 const (
-	AUTH_CONTEXT_KEY = iota
-	WS_KEY           = iota
+	wsKey = iota
+	subscriptionIdKey
 )
 
-var nip20prefixmatcher = regexp.MustCompile(`^\w+: `)
+func RequestAuth(ctx context.Context) {
+	ws := GetConnection(ctx)
+	ws.WriteJSON(nostr.AuthEnvelope{Challenge: &ws.Challenge})
+}
 
 func GetConnection(ctx context.Context) *WebSocket {
-	return ctx.Value(WS_KEY).(*WebSocket)
+	return ctx.Value(wsKey).(*WebSocket)
 }
 
 func GetAuthed(ctx context.Context) string {
-	authedPubkey := ctx.Value(AUTH_CONTEXT_KEY)
-	if authedPubkey == nil {
-		return ""
-	}
-	return authedPubkey.(string)
+	return GetConnection(ctx).AuthedPublicKey
 }
 
-func pointerHasher[V any](_ maphash.Seed, k *V) uint64 { return uint64(uintptr(unsafe.Pointer(k))) }
+func GetIP(ctx context.Context) string {
+	return xff.GetRemoteAddr(GetConnection(ctx).Request)
+}
+
+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
+}

websocket.go

@@ -1,6 +1,7 @@
 package khatru
 
 import (
+	"net/http"
 	"sync"
 
 	"github.com/fasthttp/websocket"
@@ -10,10 +11,13 @@ type WebSocket struct {
 	conn  *websocket.Conn
 	mutex sync.Mutex
 
+	// original request
+	Request *http.Request
+
 	// nip42
-	Challenge      string
-	Authed         string
-	WaitingForAuth chan struct{}
+	Challenge       string
+	AuthedPublicKey string
+	Authed          chan struct{}
 }
 
 func (ws *WebSocket) WriteJSON(any any) error {