istanbul

package
v0.0.0-...-8bbb73d Latest Latest
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 Go to latest Published: Mar 24, 2023 License: GPL-3.0 Imports: 22 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var (
	// ErrUnauthorizedAddress is returned when given address cannot be found in
	// current validator set.
	ErrUnauthorizedAddress = errors.New("unauthorized address")
	// ErrStoppedEngine is returned if the engine is stopped
	ErrStoppedEngine = errors.New("stopped engine")
	// ErrStartedEngine is returned if the engine is already started
	ErrStartedEngine = errors.New("started engine")
)
View Source 
var DefaultConfig = &Config{
	RequestTimeout:         10000,
	BlockPeriod:            5,
	EmptyBlockPeriod:       0,
	ProposerPolicy:         NewRoundRobinProposerPolicy(),
	Epoch:                  30000,
	Ceil2Nby3Block:         big.NewInt(0),
	AllowedFutureBlockTime: 0,
	TestQBFTBlock:          big.NewInt(0),
}

Functions

func CheckValidatorSignature 

func CheckValidatorSignature(valSet ValidatorSet, data []byte, sig []byte) (common.Address, error)

func GetSignatureAddress 

func GetSignatureAddress(data []byte, sig []byte) (common.Address, error)

GetSignatureAddress gets the signer address from the signature

func GetSignatureAddressNoHashing 

func GetSignatureAddressNoHashing(data []byte, sig []byte) (common.Address, error)

GetSignatureAddressNoHashing gets the signer address from the signature without first hashing the data

func RLPHash 

func RLPHash(v interface{}) (h common.Hash)

Types

type Backend 

type Backend interface {
	// Address returns the owner's address
	Address() common.Address

	// Validators returns the validator set
	Validators(proposal Proposal) ValidatorSet

	// EventMux returns the event mux in backend
	EventMux() *event.TypeMux

	// Broadcast sends a message to all validators (include self)
	Broadcast(valSet ValidatorSet, code uint64, payload []byte) error

	// Gossip sends a message to all validators (exclude self)
	Gossip(valSet ValidatorSet, code uint64, payload []byte) error

	// Commit delivers an approved proposal to backend.
	// The delivered proposal will be put into blockchain.
	Commit(proposal Proposal, seals [][]byte, round *big.Int) error

	// Verify verifies the proposal. If a consensus.ErrFutureBlock error is returned,
	// the time difference of the proposal and current time is also returned.
	Verify(Proposal) (time.Duration, error)

	// Sign signs input data with the backend's private key
	Sign([]byte) ([]byte, error)

	// SignWithoutHashing sign input data with the backend's private key without hashing the input data
	SignWithoutHashing([]byte) ([]byte, error)

	// CheckSignature verifies the signature by checking if it's signed by
	// the given validator
	CheckSignature(data []byte, addr common.Address, sig []byte) error

	// LastProposal retrieves latest committed proposal and the address of proposer
	LastProposal() (Proposal, common.Address)

	// HasPropsal checks if the combination of the given hash and height matches any existing blocks
	HasPropsal(hash common.Hash, number *big.Int) bool

	// GetProposer returns the proposer of the given block height
	GetProposer(number uint64) common.Address

	// ParentValidators returns the validator set of the given proposal's parent block
	ParentValidators(proposal Proposal) ValidatorSet

	// HasBadProposal returns whether the block with the hash is a bad block
	HasBadProposal(hash common.Hash) bool

	Close() error

	// IsQBFTConsensus checks qbftBlock fork block and returns if it should be enabled
	IsQBFTConsensusAt(*big.Int) bool

	// StartQBFTConsensus stops existing legacy ibft consensus and starts the new qbft consensus
	StartQBFTConsensus() error
}

Backend provides application specific functions for Istanbul core

type Config 

type Config struct {
	RequestTimeout         uint64                `toml:",omitempty"` // The timeout for each Istanbul round in milliseconds.
	BlockPeriod            uint64                `toml:",omitempty"` // Default minimum difference between two consecutive block's timestamps in second
	EmptyBlockPeriod       uint64                `toml:",omitempty"` // Default minimum difference between a block and empty block's timestamps in second
	ProposerPolicy         *ProposerPolicy       `toml:",omitempty"` // The policy for proposer selection
	Epoch                  uint64                `toml:",omitempty"` // The number of blocks after which to checkpoint and reset the pending votes
	Ceil2Nby3Block         *big.Int              `toml:",omitempty"` // Number of confirmations required to move from one state to next [2F + 1 to Ceil(2N/3)]
	AllowedFutureBlockTime uint64                `toml:",omitempty"` // Max time (in seconds) from current time allowed for blocks, before they're considered future blocks
	TestQBFTBlock          *big.Int              `toml:",omitempty"` // Fork block at which block confirmations are done using qbft consensus instead of ibft
	BeneficiaryMode        *string               `toml:",omitempty"` // Mode for setting the beneficiary, either: list, besu, validators (beneficiary list is the list of validators)
	BlockReward            *math.HexOrDecimal256 `toml:",omitempty"` // Reward
	MiningBeneficiary      *common.Address       `toml:",omitempty"` // Wallet address that benefits at every new block (besu mode)
	ValidatorContract      common.Address        `toml:",omitempty"`
	Validators             []common.Address      `toml:",omitempty"`
	ValidatorSelectionMode *string               `toml:",omitempty"`
	Client                 bind.ContractCaller   `toml:",omitempty"`
	Transitions            []params.Transition
}

func (Config) Get2FPlus1Enabled 

func (c Config) Get2FPlus1Enabled(blockNumber *big.Int) bool

func (Config) GetConfig 

func (c Config) GetConfig(blockNumber *big.Int) Config

func (Config) GetValidatorContractAddress 

func (c Config) GetValidatorContractAddress(blockNumber *big.Int) common.Address

func (Config) GetValidatorSelectionMode 

func (c Config) GetValidatorSelectionMode(blockNumber *big.Int) string

func (Config) GetValidatorsAt 

func (c Config) GetValidatorsAt(blockNumber *big.Int) []common.Address

func (*Config) IsQBFTConsensusAt 

func (c *Config) IsQBFTConsensusAt(blockNumber *big.Int) bool

IsQBFTConsensusAt checks if qbft consensus is enabled for the block height identified by the given header

func (Config) QBFTBlockNumber 

func (c Config) QBFTBlockNumber() int64

QBFTBlockNumber returns the qbftBlock fork block number, returns -1 if qbftBlock is not defined

type Core 

type Core interface {
	Start() error
	Stop() error
	IsProposer() bool

	// verify if a hash is the same as the proposed block in the current pending request
	//
	// this is useful when the engine is currently the proposer
	//
	// pending request is populated right at the preprepare stage so this would give us the earliest verification
	// to avoid any race condition of coming propagated blocks
	IsCurrentProposal(blockHash common.Hash) bool
}

type Engine 

type Engine interface {
	Address() common.Address
	Author(header *types.Header) (common.Address, error)
	ExtractGenesisValidators(header *types.Header) ([]common.Address, error)
	Signers(header *types.Header) ([]common.Address, error)
	CommitHeader(header *types.Header, seals [][]byte, round *big.Int) error
	VerifyBlockProposal(chain consensus.ChainHeaderReader, block *types.Block, validators ValidatorSet) (time.Duration, error)
	VerifyHeader(chain consensus.ChainHeaderReader, header *types.Header, parents []*types.Header, validators ValidatorSet) error
	VerifyUncles(chain consensus.ChainReader, block *types.Block) error
	VerifySeal(chain consensus.ChainHeaderReader, header *types.Header, validators ValidatorSet) error
	Prepare(chain consensus.ChainHeaderReader, header *types.Header, validators ValidatorSet) error
	Finalize(chain consensus.ChainHeaderReader, header *types.Header, state *state.StateDB, txs []*types.Transaction, uncles []*types.Header)
	FinalizeAndAssemble(chain consensus.ChainHeaderReader, header *types.Header, state *state.StateDB, txs []*types.Transaction, uncles []*types.Header, receipts []*types.Receipt) (*types.Block, error)
	Seal(chain consensus.ChainHeaderReader, block *types.Block, validators ValidatorSet) (*types.Block, error)
	SealHash(header *types.Header) common.Hash
	CalcDifficulty(chain consensus.ChainHeaderReader, time uint64, parent *types.Header) *big.Int
	WriteVote(header *types.Header, candidate common.Address, authorize bool) error
	ReadVote(header *types.Header) (candidate common.Address, authorize bool, err error)
}

type FinalCommittedEvent 

type FinalCommittedEvent struct {
}

FinalCommittedEvent is posted when a proposal is committed

type MessageEvent 

type MessageEvent struct {
	Code    uint64
	Payload []byte
}

MessageEvent is posted for Istanbul engine communication

type Preprepare 

type Preprepare struct {
	View     *View
	Proposal Proposal
}

func (*Preprepare) DecodeRLP 

func (b *Preprepare) DecodeRLP(s *rlp.Stream) error

DecodeRLP implements rlp.Decoder, and load the consensus fields from a RLP stream.

func (*Preprepare) EncodeRLP 

func (b *Preprepare) EncodeRLP(w io.Writer) error

EncodeRLP serializes b into the Ethereum RLP format.

type Proposal 

type Proposal interface {
	// Number retrieves the sequence number of this proposal.
	Number() *big.Int

	// Hash retrieves the hash of this proposal.
	Hash() common.Hash

	EncodeRLP(w io.Writer) error

	DecodeRLP(s *rlp.Stream) error
}

Proposal supports retrieving height and serialized block to be used during Istanbul consensus.

type ProposalSelector 

type ProposalSelector func(ValidatorSet, common.Address, uint64) Validator

type ProposerPolicy 

type ProposerPolicy struct {
	Id ProposerPolicyId    // Could be RoundRobin or Sticky
	By ValidatorSortByFunc // func that defines how the ValidatorSet should be sorted
	// contains filtered or unexported fields
}

ProposerPolicy represents the Validator Proposer Policy

func NewProposerPolicy 

func NewProposerPolicy(id ProposerPolicyId) *ProposerPolicy

func NewProposerPolicyByIdAndSortFunc 

func NewProposerPolicyByIdAndSortFunc(id ProposerPolicyId, by ValidatorSortByFunc) *ProposerPolicy

func NewRoundRobinProposerPolicy 

func NewRoundRobinProposerPolicy() *ProposerPolicy

NewRoundRobinProposerPolicy returns a RoundRobin ProposerPolicy with ValidatorSortByString as default sort function

func NewStickyProposerPolicy 

func NewStickyProposerPolicy() *ProposerPolicy

NewStickyProposerPolicy return a Sticky ProposerPolicy with ValidatorSortByString as default sort function

func (*ProposerPolicy) ClearRegistry 

func (p *ProposerPolicy) ClearRegistry()

ClearRegistry removes any ValidatorSet from the ProposerPolicy registry

func (*ProposerPolicy) MarshalTOML 

func (p *ProposerPolicy) MarshalTOML() (interface{}, error)

func (*ProposerPolicy) RegisterValidatorSet 

func (p *ProposerPolicy) RegisterValidatorSet(valSet ValidatorSet)

RegisterValidatorSet stores the given ValidatorSet in the policy registry

func (*ProposerPolicy) UnmarshalTOML 

func (p *ProposerPolicy) UnmarshalTOML(decode func(interface{}) error) error

func (*ProposerPolicy) Use 

func (p *ProposerPolicy) Use(v ValidatorSortByFunc)

Use sets the ValidatorSortByFunc for the given ProposerPolicy and sorts the validatorSets according to it

type ProposerPolicyId 

type ProposerPolicyId uint64
const (
	RoundRobin ProposerPolicyId = iota
	Sticky
)

type Request 

type Request struct {
	Proposal Proposal
}

type RequestEvent 

type RequestEvent struct {
	Proposal Proposal
}

RequestEvent is posted to propose a proposal

type Subject 

type Subject struct {
	View   *View
	Digest common.Hash
}

func (*Subject) DecodeRLP 

func (b *Subject) DecodeRLP(s *rlp.Stream) error

DecodeRLP implements rlp.Decoder, and load the consensus fields from a RLP stream.

func (*Subject) EncodeRLP 

func (b *Subject) EncodeRLP(w io.Writer) error

EncodeRLP serializes b into the Ethereum RLP format.

func (*Subject) String 

func (b *Subject) String() string

type Validator 

type Validator interface {
	// Address returns address
	Address() common.Address

	// String representation of Validator
	String() string
}

type ValidatorSet 

type ValidatorSet interface {
	// Calculate the proposer
	CalcProposer(lastProposer common.Address, round uint64)
	// Return the validator size
	Size() int
	// Return the validator array
	List() []Validator
	// Get validator by index
	GetByIndex(i uint64) Validator
	// Get validator by given address
	GetByAddress(addr common.Address) (int, Validator)
	// Get current proposer
	GetProposer() Validator
	// Check whether the validator with given address is a proposer
	IsProposer(address common.Address) bool
	// Add validator
	AddValidator(address common.Address) bool
	// Remove validator
	RemoveValidator(address common.Address) bool
	// Copy validator set
	Copy() ValidatorSet
	// Get the maximum number of faulty nodes
	F() int
	// Get proposer policy
	Policy() ProposerPolicy

	// SortValidators sorts the validators based on the configured By function
	SortValidators()
}

type ValidatorSortByFunc 

type ValidatorSortByFunc func(v1 Validator, v2 Validator) bool

func ValidatorSortByByte 

func ValidatorSortByByte() ValidatorSortByFunc

func ValidatorSortByString 

func ValidatorSortByString() ValidatorSortByFunc

func (ValidatorSortByFunc) Sort 

func (by ValidatorSortByFunc) Sort(validators []Validator)

type Validators 

type Validators []Validator

type View 

type View struct {
	Round    *big.Int
	Sequence *big.Int
}

View includes a round number and a sequence number. Sequence is the block number we'd like to commit. Each round has a number and is composed by 3 steps: preprepare, prepare and commit.

If the given block is not accepted by validators, a round change will occur and the validators start a new round with round+1.

func (*View) Cmp 

func (v *View) Cmp(y *View) int

Cmp compares v and y and returns: 

-1 if v <  y
 0 if v == y
+1 if v >  y

func (*View) DecodeRLP 

func (v *View) DecodeRLP(s *rlp.Stream) error

DecodeRLP implements rlp.Decoder, and load the consensus fields from a RLP stream.

func (*View) EncodeRLP 

func (v *View) EncodeRLP(w io.Writer) error

EncodeRLP serializes b into the Ethereum RLP format.

func (*View) String 

func (v *View) String() string

Source Files

View all Source files

Directories

Path Synopsis
contract
ibft
core
engine
types
qbft
core
engine
types

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