add websocket

Helius

2021-02-24 5285d249e702eeab3ad3847aaa24523ef0f1a544

 src/main/java/com/xcong/excoin/modules/contract/entity/ContractHoldOrderEntity.java

@@ -163,4 +163,9 @@
     */
//    @TableField(exist = false)
    private BigDecimal rewardAmount;

    /**
     * 维持保证金
     */
    private BigDecimal holdBond;
}