validator

package
Version: v1.7.0 Latest Latest
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Published: Oct 19, 2021 License: GPL-3.0 Imports: 18 Imported by: 4

Documentation

Overview

Package validator implements the types related to the validators participating in consensus.

`Validator` and `ValidatorSet` interfaces are used to validate blocks and make a consensus. Implementations of these interfaces are different, depending on proposer-choosing policy.

Validator

`Validator` is a node which has 2 features to make a consensus: proposing and validating.

Propose: A node can propose a block if it is a proposer. Only validators can be a proposer.

Validate: A validator node can validate blocks from proposers. A block is valid only if more than 2/3 of validators approve the given block.

ValidatorSet

`ValidatorSet` is a group of validators. It is also called as a council. ValidatorSet calculates the block proposer of an upcoming block. A validator selected as a block proposer will have a chance to make a block.

Implementation in Klaytn

Klaytn implements `Validator` and `ValidatorSet` interface for Klaytn consensus. Klaytn reflects the ratio of staking amounts to the probability of selecting a proposer. This is called weightedRandom policy. Detailed information can be found in https://docs.klaytn.com/klaytn/token_economy#klaytn-governance-council-reward. Implementation structures are weightedValidator and weightedCouncil in weighted.go file.

Files

- default.go : Validator and ValidatorSet for roundRobin policy is implemented.

- weighted.go : Validator and ValidatorSet for weightedRandom policy is implemented.

- validator.go : common functions for Validator and ValidatorSet are implemented.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func ConvertHashToSeed added in v1.5.0

func ConvertHashToSeed(hash common.Hash) (int64, error)

ConvertHashToSeed returns a random seed used to calculate proposer. It converts first 7.5 bytes of the given hash to int64.

func ExtractValidators

func ExtractValidators(extraData []byte) []common.Address

func GetWeightedCouncilData

func GetWeightedCouncilData(valSet istanbul.ValidatorSet) (validators []common.Address, demotedValidators []common.Address, rewardAddrs []common.Address, votingPowers []uint64, weights []uint64, proposers []common.Address, proposersBlockNum uint64)

func New

func New(addr common.Address) istanbul.Validator

func NewSet

func NewSubSet

func NewSubSet(addrs []common.Address, policy istanbul.ProposerPolicy, subSize uint64) istanbul.ValidatorSet

func NewValidatorSet

func NewValidatorSet(addrs, demotedAddrs []common.Address, proposerPolicy istanbul.ProposerPolicy, subGroupSize uint64, chain consensus.ChainReader) istanbul.ValidatorSet

func NewWeightedCouncil

func NewWeightedCouncil(addrs []common.Address, demotedAddrs []common.Address, rewards []common.Address, votingPowers []uint64, weights []uint64, policy istanbul.ProposerPolicy, committeeSize uint64, blockNum uint64, proposersBlockNum uint64, chain consensus.ChainReader) *weightedCouncil

func RecoverWeightedCouncilProposer

func RecoverWeightedCouncilProposer(valSet istanbul.ValidatorSet, proposerAddrs []common.Address)

func SelectRandomCommittee added in v1.5.0

func SelectRandomCommittee(validators []istanbul.Validator, committeeSize uint64, seed int64, proposerIdx int, nextProposerIdx int) []istanbul.Validator

SelectRandomCommittee composes a committee selecting validators randomly based on the seed value. It returns nil if the given committeeSize is bigger than validatorSize or proposer indexes are invalid.

Types

This section is empty.

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