kaiax: apply valset module on istanbul consensus

[yoomee1313]

Proposed changes

This PR applies valset module so that it can replace the snapshot validator in consensus.

Main Changes

• The following methods were added or modified in the Istanbul consensus interface:
  • Removed Validators(proposal Proposal) ValidatorSet
  • Removed ParentValidators(proposal Proposal) ValidatorSet
  • Added GetValidatorSet(num uint64) (*BlockValSet, error)
  • Added GetCommitteeSet(num uint64) (*RoundCommitteeState, error)
  • Added GetCommitteeStateByRound(num uint64, round uint64) (*RoundCommitteeState, error)
• Introduction of BlockValSet and RoundCommitteeState
  • BlockValSet: a list of registered council nodes, divided into two sublists: qualified, demoted
  • RoundCommitteeState: Extends BlockValSet with additional information: committee, proposer, f, requiredMessageCount
• The core structure now maintains the validator set for the current view (N, Round), which is essential for processing consensus messages:
  • Removed valSet istanbul.ValidatorSet
  • Added currentCommittee *istanbul.RoundCommitteeState

Points of Interest

• The transition from the Istanbul snapshot to the valset module involves the following changes:
  • Valset.SubList and Valset.SubListWithProposer have been replaced by RoundCommitteeState.Committee().
  • Valset.GetProposer has been replaced by RoundCommitteeState.Proposer().
    • The new implementation ensures the proposer is always consistent with the current view, addressing a known TODO in the previous codebase.
  • Valset.GetByAddress has been replaced by BlockValSet.Qualified().At().
• Proposer updates in weighted random logic
  • In the weighted random logic used for proposer selection, when a remove validator vote is detected, the corresponding address is removed from the proposer list. This behavior has been implemented in the kaiax valset module. 0ff82f4
• This PR didn't delete the snapshot code yet. After sync test is done, new PR will be uploaded with snapshot code deletion.

Types of changes

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• Bugfix
• New feature or enhancement
• Others

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• I have read the CLA and signed by comment I have read the CLA Document and I hereby sign the CLA in first time contribute
• Lint and unit tests pass locally with my changes ($ make test)
• I have added tests that prove my fix is effective or that my feature works
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• Any dependent changes have been merged and published in downstream modules

Related issues

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Further comments

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[blukat29]

@yoomee1313 #169 is now merged. Please rebase against it (or re-stack your commits after latest dev)

[yoomee1313]

@blukat29 @ian0371 @hyeonLewis A commit has been pushed about removeValidatorsFromProposers when remove vote casted. 0ff82f4 (changed to the new commit). Please take a look, thank you.