Interface block_header

interface block_header {
    action_mroot: Checksum256Type;
    confirmed: UInt16Type;
    new_producers: SystemContract.ActionParams.Type.producer_schedule;
    previous: Checksum256Type;
    producer: NameType;
    schedule_version: UInt32Type;
    timestamp: UInt32Type;
    transaction_mroot: Checksum256Type;
}