# BDIP3: Borrow系统的清算模块优化

本次BDIP3升级，主要完成了BakerDAO Borrow系统的清算模块优化，为V1.6的上线做准备，主要更改如下：

1.原有抵押物BNB-A、BTCB-A、ETH-A、BUSD-A的可生成BAI数量设置为0，不再允许生成BAI。已经生成的BAI不受影响，原有的金库只可以归还不允许再生成新的BAI。

2.新增抵押物: BNB-B、BTCB-B、ETH-B、BUSD-B，并且采用了新的参数配置，将稳定费率均设置为6%，详情见下表。

3.收回了清算权，只允许BAI清算池做清算。

| 抵押品类型  | 稳定费率  | 清算线     | 清算罚金   |
| ------ | ----- | ------- | ------ |
| BNB-B  | 6.00% | 175.00% | 13.00% |
| ETH-B  | 6.00% | 150.00% | 13.00% |
| BTCB-B | 6.00% | 150.00% | 13.00% |
| BUSD-B | 6.00% | 125.00% | 13.00% |


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