fix 接口加密抛异常无处理

Helius

2022-07-18 7f8da803f199ad4dd6b2b80b202afc04514099a1

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

@@ -24,4 +24,6 @@
    BigInteger blockNumber();

    BigInteger totalSupply();

    String safeMintNFT(String toAddress);
}