Struct BitcoinHashCache 

pub struct BitcoinHashCache {
    settings: Arc<RwLock<PowSettings>>,
    pub block_hashes: Vec<BitcoinBlockHash>,
    ex: ExecutorPtr,
}

A struct that can fetch and store recent Bitcoin block hashes, using Electrum nodes. This is only used to evaluate and verify fud’s Equi-X PoW. Bitcoin block hashes are used in the challenge, to make Equi-X solution expirable and unpredictable. It’s meant to be swapped with DarkFi block hashes once it is stable enough. TODO: It should ask for new Electrum nodes, and build a local database of them instead of relying only on the list defined in the settings.

Fields

settings: Arc<RwLock<PowSettings>>

PoW settings which includes BTC/Electrum settings

block_hashes: Vec<BitcoinBlockHash>

Current list of block hashes, the most recent block is at the end of the list

ex: ExecutorPtr

Global multithreaded executor reference

Implementations

impl BitcoinHashCache

pub fn new(settings: Arc<RwLock<PowSettings>>, ex: ExecutorPtr) -> Self

pub async fn update(&mut self) -> Result<Vec<BitcoinBlockHash>>

Fetch block hashes from Electrum nodes, and update BitcoinHashCache::block_hashes.

async fn create_rpc_client(&self, addr: &Url) -> Result<RpcClient>

async fn fetch_current_height(&self, client: &RpcClient) -> Result<u64>

Fetch the current BTC height using an Electrum node RPC.

async fn fetch_hashes( &self, height: u64, client: &RpcClient, ) -> Result<Vec<BitcoinBlockHash>>

Fetch self.count BTC block hashes from height using an Electrum node RPC.

fn decode_block_hashes(data: Vec<u8>) -> Result<Vec<BitcoinBlockHash>>

Convert concatenated BTC block headers to a list of block hashes.