# Structs
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.