finish all contract interface

Helius

2020-06-05 9da52c963fcbee66a3b299bb687c1efbbafe93a7

 src/main/java/com/xcong/excoin/configurations/properties/SecurityProperties.java

@@ -14,4 +14,6 @@
public class SecurityProperties {

    private String privateKey;

    private String publicKey;
}