fix: payload size is 0 when generate index

[simlecode]

关联的Issues (Related Issues)

close

改动 (Proposed Changes)

1. 一个piece发了两次，第一次失败了，第二次成功了，生成索引的时候是按piececid来查找piece信息，会找到第一次发的订单，所以有些信息找不到导致生成索引失败了
2. 增加对 MongoDB URL 的检查
3. 修复 droplet-client 启动失败

附注 (Additional Info)

自查清单 (Checklist)

在你认为本 PR 满足被审阅的标准之前，需要确保 / Before you mark the PR ready for review, please make sure that:

• 符合Venus项目管理规范中关于PR的相关标准 / The PR follows the PR standards set out in the Venus project management guidelines
• 具有清晰明确的commit message / All commits have a clear commit message.
• 包含相关的的测试用例或者不需要新增测试用例 / This PR has tests for new functionality or change in behaviour or not need to add new tests.
• 包含相关的的指南以及文档或者不需要新增文档 / This PR has updated usage guidelines and documentation or not need
• 通过必要的检查项 / All checks are green

[codecov-commenter]

Codecov Report

Merging #429 (78a24f9) into master (55c2838) will decrease coverage by 0.03%.
The diff coverage is 45.45%.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

@@            Coverage Diff             @@
##           master     #429      +/-   ##
==========================================
- Coverage   20.52%   20.49%   -0.03%     
==========================================
  Files         193      193              
  Lines       23635    23640       +5     
==========================================
- Hits         4850     4844       -6     
- Misses      17996    18004       +8     
- Partials      789      792       +3     

Flag	Coverage Δ
unittests	20.49% <45.45%> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage
config/modules.go	0.00%
dagstore/wrapper.go	0.00%
models/badger/storage_deal.go	40.00%
models/mysql/storage_deal.go	75.00%

[LinZexiao]

LGTM