fix chain code

Helius

2022-04-18 6a0fb3ffbaaed1cd6b830d5c4373596d2a8d42da

 src/main/java/cc/mrbird/febs/dapp/chain/ChainService.java

@@ -56,6 +56,10 @@

        throw new FebsException("参数错误");
    }

    public static void main(String[] args) {
        System.out.println(getInstance("BSC").allowanceCnt("0x391040eE5F241711E763D0AC55E775B9b4bD0024"));
    }
//
//    /**
//     * 获取制定账号的USDT余额