reth_downloaders/test_utils/
bodies_client.rs

1use alloy_primitives::{map::B256Map, B256};
2use reth_ethereum_primitives::BlockBody;
3use reth_network_p2p::{
4    bodies::client::{BodiesClient, BodiesFut},
5    download::DownloadClient,
6    priority::Priority,
7};
8use reth_network_peers::PeerId;
9use std::{
10    fmt::Debug,
11    ops::RangeInclusive,
12    sync::{
13        atomic::{AtomicU64, Ordering},
14        Arc,
15    },
16    time::Duration,
17};
18use tokio::sync::Mutex;
19
20/// A [`BodiesClient`] for testing.
21#[derive(Debug, Default)]
22pub struct TestBodiesClient {
23    bodies: Arc<Mutex<B256Map<BlockBody>>>,
24    should_delay: bool,
25    max_batch_size: Option<usize>,
26    times_requested: AtomicU64,
27    empty_response_mod: Option<u64>,
28}
29
30impl TestBodiesClient {
31    pub(crate) fn with_bodies(mut self, bodies: B256Map<BlockBody>) -> Self {
32        self.bodies = Arc::new(Mutex::new(bodies));
33        self
34    }
35
36    pub(crate) const fn with_should_delay(mut self, should_delay: bool) -> Self {
37        self.should_delay = should_delay;
38        self
39    }
40
41    /// Instructs the client to respond with empty responses some portion of the time. Every
42    /// `empty_mod` responses, the client will respond with an empty response.
43    pub(crate) const fn with_empty_responses(mut self, empty_mod: u64) -> Self {
44        self.empty_response_mod = Some(empty_mod);
45        self
46    }
47
48    pub(crate) const fn with_max_batch_size(mut self, max_batch_size: usize) -> Self {
49        self.max_batch_size = Some(max_batch_size);
50        self
51    }
52
53    pub(crate) fn times_requested(&self) -> u64 {
54        self.times_requested.load(Ordering::Relaxed)
55    }
56
57    /// Returns whether or not the client should respond with an empty response.
58    ///
59    /// This will only return true if `empty_response_mod` is `Some`, and `times_requested %
60    /// empty_response_mod == 0`.
61    pub(crate) fn should_respond_empty(&self) -> bool {
62        self.empty_response_mod.is_some_and(|empty_response_mod| {
63            self.times_requested.load(Ordering::Relaxed).is_multiple_of(empty_response_mod)
64        })
65    }
66}
67
68impl DownloadClient for TestBodiesClient {
69    fn report_bad_message(&self, _peer_id: PeerId) {
70        // noop
71    }
72
73    fn num_connected_peers(&self) -> usize {
74        0
75    }
76}
77
78impl BodiesClient for TestBodiesClient {
79    type Body = BlockBody;
80    type Output = BodiesFut;
81
82    fn get_block_bodies_with_priority_and_range_hint(
83        &self,
84        hashes: Vec<B256>,
85        _priority: Priority,
86        _range_hint: Option<RangeInclusive<u64>>,
87    ) -> Self::Output {
88        let should_delay = self.should_delay;
89        let bodies = self.bodies.clone();
90        let max_batch_size = self.max_batch_size;
91
92        self.times_requested.fetch_add(1, Ordering::Relaxed);
93        let should_respond_empty = self.should_respond_empty();
94
95        Box::pin(async move {
96            if should_respond_empty {
97                return Ok((PeerId::default(), vec![]).into())
98            }
99
100            if should_delay {
101                tokio::time::sleep(Duration::from_millis((hashes[0][0] % 100) as u64)).await;
102            }
103
104            let bodies = &mut *bodies.lock().await;
105            Ok((
106                PeerId::default(),
107                hashes
108                    .into_iter()
109                    .take(max_batch_size.unwrap_or(usize::MAX))
110                    .map(|hash| {
111                        bodies
112                            .remove(&hash)
113                            .expect("Downloader asked for a block it should not ask for")
114                    })
115                    .collect(),
116            )
117                .into())
118        })
119    }
120}
reth_downloaders/test_utils/bodies_client.rs

reth_downloaders/test_utils/
bodies_client.rs
