consensus

package
Version: v1.0.1 Latest Latest
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Published: Jul 31, 2020 License: GPL-3.0 Imports: 9 Imported by: 0

Documentation

Overview

Package consensus implements different Ethereum consensus engines.

Index

Constants

This section is empty.

Variables

View Source
var (
	// ErrUnknownAncestor is returned when validating a block requires an ancestor
	// that is unknown.
	ErrUnknownAncestor = errors.New("unknown ancestor")

	ErrBlockOnChain = errors.New("block already insert fastchain")

	ErrForkFastBlock = errors.New("fork fastBlock")

	// ErrPrunedAncestor is returned when validating a block requires an ancestor
	// that is known, but the state of which is not available.
	ErrPrunedAncestor = errors.New("pruned ancestor")

	// ErrFutureBlock is returned when a block's timestamp is in the future according
	// to the current node.
	ErrFutureBlock = errors.New("block in the future")

	// ErrTooFutureBlock is returned when a block's number is too future than
	// the current fastblock.
	ErrTooFutureBlock = errors.New("fruit is too higher than current fastblock")
	// ErrTooOldBlock is returned when a block's number is too old than
	// the current fastblock.
	ErrTooOldBlock = errors.New("this hight's fruit already packed in the snailchain")
	// ErrInvalidNumber is returned if a block's number doesn't equal it's parent's
	// plus one.
	ErrInvalidNumber = errors.New("invalid block number")

	//If the number of returned committees and the results are inconsistent, return ErrInvalidSignsLength
	ErrInvalidSignsLength = errors.New("invalid signs length")

	ErrValidSignsZero = errors.New("valid signs length equal zero in fruit")

	ErrInvalidBlock = errors.New("invalid snail block")

	ErrUnknownPointer = errors.New("unknown pointer hash")

	ErrFreshness = errors.New("invalid fruit freshness")

	ErrInvalidSign = errors.New("invalid sign")

	ErrInvalidSwitchInfo = errors.New("invalid switch info")

	ErrUnknownFast = errors.New("unknown fast block")
)

Functions

func CheckCAElection

func CheckCAElection(state *state.StateDB, fastNumber *big.Int, rootCimList *cim.CimList)

func OnceInitCAState

func OnceInitCAState(state *state.StateDB, fastNumber *big.Int, certList [][]byte, pubk [][]byte, coinAddr []common.Address) bool

Types

type ChainReader

type ChainReader interface {
	// Config retrieves the blockchain's chain configuration.
	Config() *params.ChainConfig

	// CurrentHeader retrieves the current header from the local chain.
	CurrentHeader() *types.Header

	// GetHeader retrieves a block header from the database by hash and number.
	GetHeader(hash common.Hash, number uint64) *types.Header

	// GetHeaderByNumber retrieves a block header from the database by number.
	GetHeaderByNumber(number uint64) *types.Header

	// GetHeaderByHash retrieves a block header from the database by its hash.
	GetHeaderByHash(hash common.Hash) *types.Header

	// GetBlock retrieves a block from the database by hash and number.
	GetBlock(hash common.Hash, number uint64) *types.Block
}

ChainReader defines a small collection of methods needed to access the local blockchain during header and/or signs verification.

type CommitteeElection

type CommitteeElection interface {
	// VerifySigns verify the fast chain committee signatures in batches
	VerifySigns(pvs []*types.PbftSign) ([]*types.CommitteeMember, []error)

	// VerifySwitchInfo verify committee members and it's state
	VerifySwitchInfo(fastnumber *big.Int, info []*types.CommitteeMember) error

	//Get a list of committee members
	//GetCommittee(FastNumber *big.Int, FastHash common.Hash) (*big.Int, []*types.CommitteeMember)
	GetCommittee(fastNumber *big.Int) []*types.CommitteeMember

	GenerateFakeSigns(fb *types.Block) ([]*types.PbftSign, error)
}

Election module implementation committee interface

type Engine

type Engine interface {
	SetElection(e CommitteeElection)

	GetElection() CommitteeElection

	// Author retrieves the Ethereum address of the account that minted the given
	// block, which may be different from the header's coinbase if a consensus
	// engine is based on signatures.
	Author(header *types.Header) (common.Address, error)

	// VerifyHeader checks whether a header conforms to the consensus rules of a
	// given engine. Verifying the seal may be done optionally here, or explicitly
	// via the VerifySeal method.
	VerifyHeader(chain ChainReader, header *types.Header) error

	// VerifyHeaders is similar to VerifyHeader, but verifies a batch of headers
	// concurrently. The method returns a quit channel to abort the operations and
	// a results channel to retrieve the async verifications (the order is that of
	// the input slice).
	VerifyHeaders(chain ChainReader, headers []*types.Header, seals []bool) (chan<- struct{}, <-chan error)

	VerifySigns(fastnumber *big.Int, fastHash common.Hash, signs []*types.PbftSign) error

	VerifySwitchInfo(fastnumber *big.Int, info []*types.CommitteeMember) error

	// Prepare initializes the consensus fields of a block header according to the
	// rules of a particular engine. The changes are executed inline.
	Prepare(chain ChainReader, header *types.Header) error
	// Finalize runs any post-transaction state modifications (e.g. block rewards)
	// and assembles the final block.
	// Note: The block header and state database might be updated to reflect any
	// consensus rules that happen at finalization (e.g. block rewards).
	Finalize(chain ChainReader, header *types.Header, state *state.StateDB,
		txs []*types.Transaction, receipts []*types.Receipt, feeAmount *big.Int) (*types.Block, error)
	APIs(chain ChainReader) []rpc.API
}

Engine is an algorithm agnostic consensus engine.

type PoW

type PoW interface {
	Engine

	// Hashrate returns the current mining hashrate of a PoW consensus engine.
	Hashrate() float64
}

PoW is a consensus engine based on proof-of-work.

Directories

Path Synopsis
Package minerva implements the taiyuechain hybrid consensus engine.
Package minerva implements the taiyuechain hybrid consensus engine.
help/flowrate
Package flowrate provides the tools for monitoring and limiting the flow rate of an arbitrary data stream.
Package flowrate provides the tools for monitoring and limiting the flow rate of an arbitrary data stream.
tp2p/upnp
Taken from taipei-torrent.
Taken from taipei-torrent.

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