quorum

type Decider interface {
	fmt.Stringer
	SignatureReader
	SetVoters(subCommittee *shard.Committee, epoch *big.Int) (*TallyResult, error)
	Policy() Policy
	AddNewVote(
		p Phase, pubkeys []*bls_cosi.PublicKeyWrapper,
		sig *bls_core.Sign, headerHash common.Hash,
		height, viewID uint64,
	) (*votepower.Ballot, error)
	IsQuorumAchieved(Phase) bool
	IsQuorumAchievedByMask(mask *bls_cosi.Mask) bool
	QuorumThreshold() numeric.Dec
	IsAllSigsCollected() bool
	ResetPrepareAndCommitVotes()
	ResetViewChangeVotes()
	CurrentTotalPower(p Phase) (*numeric.Dec, error)
}

type ParticipantTracker interface {
	Participants() multibls.PublicKeys
	IndexOf(bls.SerializedPublicKey) int
	ParticipantsCount() int64
	// NthNextValidator returns key for next validator. It assumes external validators and leader rotation.
	NthNextValidator(slotList shard.SlotList, pubKey *bls.PublicKeyWrapper, next int) (bool, *bls.PublicKeyWrapper)
	NthNextItc(instance shardingconfig.Instance, pubkey *bls.PublicKeyWrapper, next int) (bool, *bls.PublicKeyWrapper)
	NthNextItcExt(shardingconfig.Instance, *bls.PublicKeyWrapper, int) (bool, *bls.PublicKeyWrapper)
	FirstParticipant(shardingconfig.Instance) *bls.PublicKeyWrapper
	UpdateParticipants(pubKeys, allowlist []bls.PublicKeyWrapper)
}

type Phase byte

type Policy byte

type Registry struct {
	Deciders      map[string]Decider `json:"quorum-deciders"`
	ExternalCount int                `json:"external-slot-count"`
	MedianStake   numeric.Dec        `json:"epos-median-stake"`
	Epoch         int                `json:"epoch"`
}

type SignatoryTracker interface {
	ParticipantTracker

	// Caller assumes concurrency protection
	SignersCount(Phase) int64
	// contains filtered or unexported methods
}

type SignatureReader interface {
	SignatoryTracker
	ReadBallot(p Phase, pubkey bls.SerializedPublicKey) *votepower.Ballot
	TwoThirdsSignersCount() int64
	// 96 bytes aggregated signature
	AggregateVotes(p Phase) *bls_core.Sign
}

type TallyResult struct {
	// contains filtered or unexported fields
}

type Transition struct {
	Previous Registry `json:"previous"`
	Current  Registry `json:"current"`
}

type Verifier interface {
	IsQuorumAchievedByMask(mask *bls_cosi.Mask) bool
}

type VoteTally struct {
	Prepare    *tallyAndQuorum
	Commit     *tallyAndQuorum
	ViewChange *tallyAndQuorum
}