[venus-market] 订单过滤器

[hunjixin]

Checklist

• [X] This is not a new feature or an enhancement to the Filecoin protocol. If it is, please open an FIP issue.
• [X] This is not a new feature request. If it is, please file a feature request instead.
• [X] This is not brainstorming ideas. If you have an idea you'd like to discuss, please open a new discussion on the venus forum and select the category as Ideas.
• [X] I have a specific, actionable, and well motivated improvement to propose.

Venus component

• [ ] venus daemon - [chain service] chain sync
• [ ] venus auth - [chain service] authentication
• [ ] venus messager - [chain service] message management (mpool)
• [ ] venus gateway - [chain service] gateway
• [ ] venus miner - [chain service] mining and block production
• [ ] venus sealer/worker - sealing
• [ ] venus sealer - proving (WindowPoSt)
• [X] venus market - storage deal
• [X] venus market - retrieval deal
• [ ] venus market - data transfer
• [ ] venus light-weight client
• [ ] venus JSON-RPC API
• [ ] Other

Improvement Suggestion

venus-market实现类似lotus的订单过滤器，每个miner通过自定义过滤脚本来阻止或者接受特定的订单（包括client，size，等）

[Fatman13]

这个到时候和CIDgravity集成，就不用咱们自己搞了。@hunjixin

[Fatman13]

可能CIDgravity不够，还是需要？@hunjixin

[Fatman13]

改成 market（订单服务）的 milestone。[doge]