feat: add lnurl with lightning.pub

go.mod

@@ -4,6 +4,7 @@ go 1.23.0
 
 require (
 	git.devvul.com/asara/gologger v0.8.0
+	github.com/davecgh/go-spew v1.1.1
 	github.com/fiatjaf/eventstore v0.8.1
 	github.com/fiatjaf/khatru v0.8.0
 	github.com/jmoiron/sqlx v1.4.0

lightningpub/well-known.go

@@ -0,0 +1,87 @@
+package lightningpub
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net"
+	"net/http"
+
+	"git.devvul.com/asara/gologger"
+	"git.devvul.com/asara/well-goknown/config"
+	"github.com/jmoiron/sqlx"
+)
+
+var (
+	DB *sqlx.DB
+)
+
+type lnurlp struct {
+	Tag         string `json:"tag"`
+	Callback    string `json:"callback"`
+	MaxSendable int64  `json:"maxSendable"`
+	MinSendable int64  `json:"minSendable"`
+	Metadata    string `json:"metadata"`
+	AllowsNostr bool   `json:"allowsNostr"`
+	NostrPubkey string `json:"nostrPubkey"`
+}
+
+func GetLnurlp(w http.ResponseWriter, r *http.Request) {
+	l := gologger.Get(config.GetConfig().LogLevel).With().Str("context", "lightningpub").Logger()
+
+	// normalize domain
+	domain, _, err := net.SplitHostPort(r.Host)
+	if err != nil {
+		domain = r.Host
+	}
+
+	name := r.PathValue("name")
+	var lnwallet string
+	err = DB.QueryRow("SELECT wallet FROM lnwallets WHERE name=$1 AND domain=$2", name, domain).Scan(&lnwallet)
+	if err != nil {
+		l.Debug().Msgf("user (%s@%s) doesn't exist: %s", name, domain, err.Error())
+		http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
+		return
+	}
+
+	//upstreamUrl := fmt.Sprintf("https://%s/api/guest/lnurl_pay/info?k1=%s", domain, lnwallet)
+	upstreamUrl := fmt.Sprintf("https://%s/api/guest/lnurl_pay/info?k1=%s", domain, lnwallet)
+	upstreamPayload, err := http.Get(upstreamUrl)
+	if err != nil {
+		l.Debug().Msgf("user (%s@%s) doesn't exist: %s", name, domain, err.Error())
+		http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
+		return
+	}
+
+	defer upstreamPayload.Body.Close()
+	body, err := ioutil.ReadAll(upstreamPayload.Body)
+	if err != nil {
+		l.Debug().Msgf("user (%s@%s) doesn't exist: %s", name, domain, err.Error())
+		http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
+		return
+	}
+
+	lnurlpReturn := lnurlp{}
+	err = json.Unmarshal(body, &lnurlpReturn)
+	if err != nil {
+		l.Debug().Msgf("user (%s@%s) doesn't exist: %s", name, domain, err.Error())
+		http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
+		return
+	}
+
+	m := fmt.Sprintf("[[\"text/plain\", \"ln address payment to a user on the devvul server\"],[\"text/identifier\", \"%s@%s\"]]", name, domain)
+	lnurlpReturn.Metadata = m
+
+	ret, err := json.Marshal(lnurlpReturn)
+	if err != nil {
+		l.Debug().Msgf("user (%s@%s) doesn't exist: %s", name, domain, err.Error())
+		http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
+		return
+	}
+
+	l.Debug().Msgf("returning lnwallet for %s@%s", name, domain)
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusOK)
+	w.Write(ret)
+	return
+}

main.go

@@ -6,6 +6,7 @@ import (
 	"git.devvul.com/asara/gologger"
 	"git.devvul.com/asara/well-goknown/config"
 	"git.devvul.com/asara/well-goknown/db"
+	"git.devvul.com/asara/well-goknown/lightningpub"
 	"git.devvul.com/asara/well-goknown/matrix"
 	"git.devvul.com/asara/well-goknown/nostr"
 	"github.com/fiatjaf/eventstore/postgresql"
@@ -20,12 +21,12 @@ func main() {
 	db, _ := db.NewDB()
 	defer db.Close()
 
+	lightningpub.DB = db
 	nostr.DB = db
 	nostr.RelayDb = postgresql.PostgresBackend{DatabaseURL: config.GetConfig().DbUrl}
 	if err := nostr.RelayDb.Init(); err != nil {
 		l.Panic().Msgf("unable to connect to relay db: %s", err.Error())
 	}
-
 	relay := nostr.NewRelay(Version)
 
 	// matrix endpoints
@@ -38,6 +39,10 @@ func main() {
 	http.HandleFunc("/.well-known/nostr.json", nostr.GetNostrAddr)
 	http.Handle("/relay", relay)
 
+	// lnurlp endpoint
+	l.Debug().Msg("enabling lnurlp well-known endpoint")
+	http.HandleFunc("/.well-known/lnurlp/{name}", lightningpub.GetLnurlp)
+
 	// start server
 	port := config.GetConfig().ListenAddr
 	l.Info().Msgf("starting server on %s", port)

migrations/000002_lnurl.down.sql

@@ -0,0 +1,5 @@
+BEGIN;
+DROP TRIGGER IF EXISTS update_lnwallets_update_ts on lnwallets;
+DROP FUNCTION IF EXISTS lnwallets_update_ts();
+DROP TABLE IF EXISTS lnwallets;
+COMMIT;

migrations/000002_lnurl.up.sql

@@ -0,0 +1,29 @@
+BEGIN;
+CREATE TABLE IF NOT EXISTS lnwallets (
+  id SERIAL PRIMARY KEY,
+  owner_id INT NOT NULL,
+  name TEXT UNIQUE NOT NULL,
+  domain TEXT NOT NULL,
+  wallet TEXT NOT NULL,
+  create_ts TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
+  update_ts TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
+  CONSTRAINT fk_owner FOREIGN KEY(owner_id) REFERENCES users(id),
+  CONSTRAINT ck_name CHECK (name ~ '^[a-z0-9]*$')
+);
+
+CREATE  FUNCTION lnwallets_update_ts()
+RETURNS TRIGGER AS $$
+BEGIN
+    NEW.update_ts = now();
+    RETURN NEW;
+END;
+$$ language 'plpgsql';
+
+CREATE TRIGGER update_lnwallets_update_ts
+    BEFORE UPDATE
+    ON
+        lnwallets
+    FOR EACH ROW
+EXECUTE PROCEDURE lnwallets_update_ts();
+
+COMMIT;

nostr/policies.go

@@ -14,8 +14,8 @@ func RejectUnregisteredNpubs(ctx context.Context, event *nostr.Event) (reject bo
 	var err error
 	l := gologger.Get(config.GetConfig().LogLevel).With().Str("context", "nostr-reject-unregistered").Logger()
 
-	// always allow seals, lightning ephemeral messages, auth messages
+	// always allow seals, lightning ephemeral messages, auth messages, addressable events
-	if event.Kind == 13 || event.Kind == 21000 || event.Kind == 22242 || event.Kind == 30078 {
+	if event.Kind == 13 || event.Kind == 21000 || event.Kind == 22242 || event.Kind == 30078 || event.Kind == 1059 {
 		return false, ""
 	}
 
@@ -27,8 +27,8 @@ func RejectUnregisteredNpubs(ctx context.Context, event *nostr.Event) (reject bo
 	}
 
 	npubs := []string{authenticatedUser}
-	// add recipients of dms (nip04)/private dms (nip17)/gift wraps (nip59) to npubs list
+	// add recipients of dms/private dms/gift wraps/signature requests to npubs list
-	if event.Kind == 4 || event.Kind == 14 || event.Kind == 1059 {
+	if event.Kind == 4 || event.Kind == 14 || event.Kind == 1059 || event.Kind == 24133 {
 		for _, npub := range event.Tags.GetAll([]string{"p"}) {
 			npubs = append(npubs, npub.Value())
 		}