deprecated 함수 제거

core/api_coupon.go

@@ -44,17 +44,17 @@ func makeCouponKey(roundnum uint32, uid []byte) string {
 	return fmt.Sprintf("%s-%s-%s-%s", hex.EncodeToString(final[0:2]), hex.EncodeToString(final[2:4]), hex.EncodeToString(final[4:6]), hex.EncodeToString(final[6:8]))
 }
 
+var r = rand.New(rand.NewSource(time.Now().UnixNano()))
+
 func makeCouponCodes(name string, count int) (string, map[string]string) {
 	checkunique := make(map[string]bool)
 	keys := make(map[string]string)
 	uid := make([]byte, 4)
 
 	roundHash, roundnum := coupon.MakeCouponRoundHash(name)
-	seed := time.Now().UnixNano()
 
 	for len(keys) < count {
-		rand.Seed(seed)
-		rand.Read(uid)
+		r.Read(uid)
 
 		code := makeCouponKey(roundnum, uid)
 
@@ -62,7 +62,6 @@ func makeCouponCodes(name string, count int) (string, map[string]string) {
 			checkunique[code] = true
 			keys[hex.EncodeToString(uid)] = code
 		}
-		seed = int64(binary.BigEndian.Uint32(uid))
 	}
 	return roundHash, keys
 }