Package minerva implements the truechain hybrid consensus engine.

ErrBlockOnChain is returned when validating a block but it isalready on the fast chain.

ErrForkFastBlock is returned when validating a block but the same number other block already in the chain.

ErrFruitTime is returned if the fruit's time less than fastblock's time.

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

ErrInvalidFast is returned if the fastchain not have the hash.

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

ErrInvalidSignsLength If the number of returned committees and the results are inconsistent, return ErrInvalidSignsLength.

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

ErrTooFutureBlock is returned when a block's number is too future than the current fastblock.

ErrTooOldBlock is returned when a block's number is too old than the current fastblock.

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

ErrValidSignsZero is returned if a block's signs length is zero.

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

CommitteeElection module implementation committee interface.

Engine is an algorithm agnostic consensus engine.

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

SnailChainReader defines a small collection of methods needed to access the local block chain during header and/or uncle verification.