add changeBond interface

Helius

2020-06-02 46a4a7b1a83d733aee95dcfe156ff3f1302632ac

 src/main/java/com/xcong/excoin/common/system/service/CommonService.java

@@ -8,4 +8,5 @@

    public boolean verifyCode(String account, String code);

    public String generateOrderNo(Long mid);
}