finish contrach closing order and fix rabbit some question

Helius

2020-06-01 4b844113469b203adc40f1e540de98612321f26e

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package com.xcong.excoin.modules.blackchain.service; 
 
import com.xcong.excoin.common.response.Result; 
 
public interface BlockSerive { 
 
    Result findBlockAddress(String symbol); 
 
}