fix 接口加密抛异常无处理

Helius

2022-07-18 7f8da803f199ad4dd6b2b80b202afc04514099a1

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

@@ -113,4 +113,9 @@
    public BigInteger totalSupply() {
        return null;
    }

    @Override
    public String safeMintNFT(String toAddress) {
        return null;
    }
}