subspace_farmer/single_disk_farm/
plotted_sectors.rs

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use crate::farm::{FarmError, PlottedSectors};
use async_lock::RwLock as AsyncRwLock;
use async_trait::async_trait;
use futures::{stream, Stream};
use std::sync::Arc;
use subspace_core_primitives::pieces::PieceOffset;
use subspace_core_primitives::sectors::SectorId;
use subspace_core_primitives::PublicKey;
use subspace_farmer_components::plotting::PlottedSector;
use subspace_farmer_components::sector::SectorMetadataChecksummed;
use subspace_farmer_components::FarmerProtocolInfo;

/// Getter for single disk plotted sectors
#[derive(Debug)]
pub struct SingleDiskPlottedSectors {
    pub(super) public_key: PublicKey,
    pub(super) pieces_in_sector: u16,
    pub(super) farmer_protocol_info: FarmerProtocolInfo,
    pub(super) sectors_metadata: Arc<AsyncRwLock<Vec<SectorMetadataChecksummed>>>,
}

#[async_trait]
impl PlottedSectors for SingleDiskPlottedSectors {
    async fn get(
        &self,
    ) -> Result<
        Box<dyn Stream<Item = Result<PlottedSector, FarmError>> + Unpin + Send + '_>,
        FarmError,
    > {
        let public_key_hash = self.public_key.hash();
        let sectors_metadata = self.sectors_metadata.read().await.clone();
        Ok(Box::new(stream::iter((0..).zip(sectors_metadata).map(
            move |(sector_index, sector_metadata)| {
                let sector_id =
                    SectorId::new(public_key_hash, sector_index, sector_metadata.history_size);

                let mut piece_indexes = Vec::with_capacity(usize::from(self.pieces_in_sector));
                (PieceOffset::ZERO..)
                    .take(usize::from(self.pieces_in_sector))
                    .map(|piece_offset| {
                        sector_id.derive_piece_index(
                            piece_offset,
                            sector_metadata.history_size,
                            self.farmer_protocol_info.max_pieces_in_sector,
                            self.farmer_protocol_info.recent_segments,
                            self.farmer_protocol_info.recent_history_fraction,
                        )
                    })
                    .collect_into(&mut piece_indexes);

                Ok(PlottedSector {
                    sector_id,
                    sector_index,
                    sector_metadata,
                    piece_indexes,
                })
            },
        ))))
    }
}