new packages

lnurlp/lnurlp_callback.go

@@ -0,0 +1,83 @@
+package lnurlp
+
+import (
+	"encoding/hex"
+	"github.com/gorilla/mux"
+	log "github.com/sirupsen/logrus"
+	"net/http"
+	"strconv"
+	"github.com/boltcard/boltcard/lnd"
+	"github.com/boltcard/boltcard/db"
+	"github.com/boltcard/boltcard/resp_err"
+)
+
+func Callback(w http.ResponseWriter, r *http.Request) {
+	if db.Get_setting("FUNCTION_LNURLP") != "ENABLE" {
+		log.Debug("LNURLp function is not enabled")
+		return
+	}
+
+	name := mux.Vars(r)["name"]
+	amount := r.URL.Query().Get("amount")
+
+	card_id, err := db.Get_card_id_for_name(name)
+	if err != nil {
+		log.Info("card name not found")
+		resp_err.Write(w)
+		return
+	}
+
+	log.WithFields(
+		log.Fields{
+			"url_path": r.URL.Path,
+			"name":     name,
+			"card_id":  card_id,
+			"amount":   amount,
+			"req.Host": r.Host,
+		}).Info("lnurlp_callback")
+
+	domain := db.Get_setting("HOST_DOMAIN")
+	if r.Host != domain {
+		log.Warn("wrong host domain")
+		resp_err.Write(w)
+		return
+	}
+
+	amount_msat, err := strconv.ParseInt(amount, 10, 64)
+	if err != nil {
+		log.Warn("amount is not a valid integer")
+		resp_err.Write(w)
+		return
+	}
+
+	amount_sat := amount_msat / 1000
+
+	metadata := "[[\"text/identifier\",\"" + name + "@" + domain + "\"],[\"text/plain\",\"bolt card deposit\"]]"
+	pr, r_hash, err := lnd.Add_invoice(amount_sat, metadata)
+	if err != nil {
+		log.Warn("could not add_invoice")
+		resp_err.Write(w)
+		return
+	}
+
+	err = db.Insert_receipt(card_id, pr, hex.EncodeToString(r_hash), amount_msat)
+	if err != nil {
+		log.Warn(err)
+		resp_err.Write(w)
+		return
+	}
+
+	go lnd.Monitor_invoice_state(r_hash)
+
+	log.Debug("sending 'status OK' response")
+
+	jsonData := []byte(`{` +
+		`"status":"OK",` +
+		`"routes":[],` +
+		`"pr":"` + pr + `"` +
+		`}`)
+
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusOK)
+	w.Write(jsonData)
+}