Code Refactor, no functional change

[chengchen666]

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[hami-robot]

Thanks for your pull request. Before we can look at it, you'll need to add a 'DCO signoff' to your commits.

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The list of commits missing DCO signoff:

• dfd26be Refactor hook module
• 3376751 Refactor limiter module
• 0ab54d1 Refactor limiter module cont.

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