fix inconsistency in name saving.

db.go

@@ -21,10 +21,10 @@ type Params struct {
 }
 
 func SaveName(name string, params *Params, providedPin string) (pin string, err error) {
-	key := []byte(name + "@" + s.Domain)
+	key := []byte(name)
 
 	mac := hmac.New(sha256.New, []byte(s.Secret))
-	mac.Write(key)
+	mac.Write([]byte(name + "@" + s.Domain))
 	pin = hex.EncodeToString(mac.Sum(nil))
 
 	if _, closer, err := db.Get(key); err == nil {

makeinvoice.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"crypto/sha256"
+	"encoding/hex"
 	"strconv"
 	"time"
 
@@ -50,6 +51,11 @@ func makeInvoice(params *Params, msat int) (bolt11 string, err error) {
 		}
 	}
 
+	log.Debug().Int("msatoshi", msat).
+		Interface("backend", backend).
+		Str("description_hash", hex.EncodeToString(h[:])).
+		Msg("generating invoice")
+
 	// actually generate the invoice
 	return makeinvoice.MakeInvoice(makeinvoice.Params{
 		Msatoshi:        int64(msat),