consensus

type Block interface {
	GetHeader() Header
}

type ChainReader interface {
	GetCurrentHeader() Header
	GetHeader(hash types.Byte32, height uint64) Header
	GetHeaderByHeight(height uint64) Header
	GetHeaderByHash(hash types.Byte32) Header
	GetBlock(hash types.Byte32, height uint64) Block
}

type Data interface {

	// for msgp
	msgp.Decodable
	msgp.Encodable
	msgp.Marshaler
	msgp.Unmarshaler
	msgp.Sizer

	DataWrapper
	DataUnWrapper
}

type DataUnWrapper interface {
	UnWrap(oriConsensusData []byte) error
}

type DataWrapper interface {
	Wrap() ([]byte, error)
}

type Engine interface {
	//Stuffer
	Verifier
	Forger
}

type Forger interface {
	Forge(chain ChainReader, header Header) (Data, error)
}

type Header interface {
	GetHeight() uint64
	GetHash() types.Byte32
	GetParentHash() types.Byte32
	//GetNonce() uint64
	GetTimestamp() uint64
	GetGenerator() types.Bytes
	GetDifficulty() *big.Int
	GetOriConsensusData() types.Bytes
}

type Verifier interface {
	// VerifyHeader checks whether a header conforms to the consensus rules of a
	// given engine.
	VerifyHeader(chain ChainReader, header Header) error
	VerifyHeaderWithoutForge(chain ChainReader, header Header) error

	// VerifySeal checks whether the crypto seal on a header is valid according to
	// the consensus rules of the given engine.
	VerifyForge(chain ChainReader, header Header) error
}