CalcDifficulty is the difficulty adjustment algorithm.

CliqueRLP returns the rlp bytes which needs to be signed for the proof-of-authority sealing.

New creates a Clique proof-of-authority consensus engine with the initial signers set to the ones provided by the user.

SealHash returns the hash of a block prior to it being sealed.

ErrInvalidTimestamp is returned if the timestamp of a block is lower than the previous block's timestamp + the minimum block period.

API is a user facing RPC API to allow controlling the signer and voting mechanisms of the proof-of-authority scheme.

Clique is the proof-of-authority consensus engine proposed to support the Ethereum testnet following the Ropsten attacks.

Snapshot is the state of the authorization voting at a given point in time.

Tally is a simple vote tally to keep the current score of votes.

Vote represents a single vote that an authorized signer made to modify the list of authorizations.

SignerFn is a signer callback function to request a header to be signed by a backing account.