consensus

Documentation

Index

• Variables
• type ChainReader
• type Engine

Variables

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

	// ErrInvalidNumber is returned if a block's number doesn't equal it's parent's
	// plus one.
	ErrInvalidNumber = errors.New("invalid block number")
)

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 uncle verification.

type Engine

type Engine interface {

	// Author retrieves the dacchain 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)

	Prepare(chain ChainReader, header *types.Header) error

	Finalize(chain ChainReader, header *types.Header, state *state.StateDB, dState *delegatestate.DelegateDB, txs []*types.Transaction, receipts []*types.Receipt) (*types.Block, 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

	// check the block header sign,check coinbase when receive block by delegate p2p net
	VerifyHeaderAndSign(chain ChainReader, block *types.Block, currentShuffleList *types.ShuffleList, blockInterval int) error

	// verify confirm sign is correct
	VerifySignatureSend(blockHash common.Hash, confirmSign []byte, currentShuffleList *types.ShuffleList) error

	// verify block when ordinary node receive
	VerifyBlockGenerate(chain ChainReader, block *types.Block, currentShuffleList *types.ShuffleList, blockInterval int) 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) (chan<- struct{}, <-chan error)

	// APIs returns the RPC APIs this consensus engine provides.
	APIs(chain ChainReader) []rpc.API
}

DAC consensus engine.