HeaderInfo

/// Minimal header information required for the Difficulty calculation to
/// take place
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct HeaderInfo {
    /// Timestamp of the header, 1 when not used (returned info)
    pub timestamp: u64,
    /// Network difficulty or next difficulty to use
    pub difficulty: Difficulty,
    /// Network secondary PoW factor or factor to use
    pub secondary_scaling: u32,
    /// Whether the header is a secondary proof of work
    pub is_secondary: bool,
}

用处不大。