rspow 0.5.0

A multi-algorithm proof-of-work library in rust
Documentation 
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use std::time::Duration;

use crate::equix::types::ProofBundle;
use crate::error::Error;

/// Configuration used by the near-stateless verifier.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct VerifierConfig {
    pub time_window: Duration,
    pub min_difficulty: u32,
    pub min_required_proofs: usize,
}

impl Default for VerifierConfig {
    fn default() -> Self {
        Self {
            time_window: Duration::from_secs(1),
            min_difficulty: 1,
            min_required_proofs: 1,
        }
    }
}

impl VerifierConfig {
    pub fn validate(&self) -> Result<(), Error> {
        // Require integral seconds to avoid silent truncation.
        if self.time_window < Duration::from_secs(1) {
            return Err(Error::InvalidConfig(
                "time_window must be at least 1 second".into(),
            ));
        }
        if self.time_window.subsec_nanos() != 0 {
            return Err(Error::InvalidConfig(
                "time_window must be a whole number of seconds".into(),
            ));
        }
        if self.min_difficulty == 0 {
            return Err(Error::InvalidConfig("min_difficulty must be >= 1".into()));
        }
        if self.min_required_proofs == 0 {
            return Err(Error::InvalidConfig(
                "min_required_proofs must be >= 1".into(),
            ));
        }
        Ok(())
    }
}

/// Payload submitted by clients for verification.
#[derive(Debug, Clone)]
pub struct Submission {
    pub timestamp: u64,
    pub client_nonce: [u8; 32],
    pub proof_bundle: ProofBundle,
}

/// Parameters a server sends to clients for solving.
#[derive(Debug, Clone)]
pub struct SolveParams {
    pub timestamp: u64,
    pub deterministic_nonce: [u8; 32],
    pub config: VerifierConfig,
}

#[derive(Debug, thiserror::Error)]
pub enum SubmissionBuilderError {
    #[error("invalid config: {0}")]
    InvalidConfig(String),
}