Package clique implements the proof-of-authority consensus engine.

Package ethash implements the ethash proof-of-work consensus engine.

ErrFutureBlock is returned when a block's timestamp is in the future according to the current node.

ErrInvalidL1MessageOrder is returned if a block contains L1 messages in the wrong order.

ErrInvalidNumber is returned if a block's number doesn't equal its parent's plus one.

ErrInvalidTxCount is returned if a block contains too many transactions.

ErrMissingL1MessageData is returned if a block contains L1 messages that the node has not synced yet.

ErrPrunedAncestor is returned when validating a block requires an ancestor that is known, but the state of which is not available.

ErrUnknownAncestor is returned when validating a block requires an ancestor that is unknown.

ErrUnknownL1Message is returned if a block contains an L1 message that does not match the corresponding message in the node's local database.

ChainHeaderReader defines a small collection of methods needed to access the local blockchain during header verification.

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

Engine is an algorithm agnostic consensus engine.

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