consensus

type Mechanism interface {
	// Opinion retrieves the opinion of the given branches.
	Opinion(branchIDs ledgerstate.BranchIDs) (liked, disliked ledgerstate.BranchIDs, err error)

	// LikedInstead returns the liked branch out of the conflict set of the given branch.
	LikedInstead(branchID ledgerstate.BranchID) (opinionTuple []OpinionTuple, err error)
}

type OpinionTuple struct {
	// Liked is the liked branch out of a conflict set.
	Liked ledgerstate.BranchID
	// Disliked is the disliked branch out of a conflict set.
	Disliked ledgerstate.BranchID
}

type WeightFunc func(branchID ledgerstate.BranchID) (weight float64)