45 lines
1.2 KiB
Rust
45 lines
1.2 KiB
Rust
//! Ethash implementation
|
|
//! See https://github.com/ethereum/wiki/wiki/Ethash
|
|
extern crate sha3;
|
|
mod sizes;
|
|
mod compute;
|
|
|
|
use compute::Light;
|
|
pub use compute::{quick_get_difficulty, H256, ProofOfWork, ETHASH_EPOCH_LENGTH};
|
|
|
|
use std::collections::HashMap;
|
|
use std::sync::RwLock;
|
|
|
|
/// Lighy/Full cache manager
|
|
pub struct EthashManager {
|
|
lights: RwLock<HashMap<u64, Light>>,
|
|
}
|
|
|
|
impl EthashManager {
|
|
/// Create a new new instance of ethash manager
|
|
pub fn new() -> EthashManager {
|
|
EthashManager {
|
|
lights: RwLock::new(HashMap::new())
|
|
}
|
|
}
|
|
|
|
/// Calculate the light client data
|
|
/// `block_number` - Block number to check
|
|
/// `light` - The light client handler
|
|
/// `header_hash` - The header hash to pack into the mix
|
|
/// `nonce` - The nonce to pack into the mix
|
|
pub fn compute_light(&self, block_number: u64, header_hash: &H256, nonce: u64) -> ProofOfWork {
|
|
let epoch = block_number / ETHASH_EPOCH_LENGTH;
|
|
while !self.lights.read().unwrap().contains_key(&epoch) {
|
|
if let Ok(mut lights) = self.lights.try_write()
|
|
{
|
|
if !lights.contains_key(&epoch) {
|
|
let light = Light::new(block_number);
|
|
lights.insert(epoch, light);
|
|
}
|
|
}
|
|
}
|
|
self.lights.read().unwrap().get(&epoch).unwrap().compute(header_hash, nonce)
|
|
}
|
|
}
|