fix applicationContext is null

Helius

2022-07-26 9f2ed49ce5ac0433549bb2a871aa4f4745b79d95

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

@@ -20,4 +20,8 @@
    int allowanceCnt(String address);

    int decimals();

    BigInteger blockNumber();

    BigInteger totalSupply();
}