117 lines
3.9 KiB
Rust
117 lines
3.9 KiB
Rust
//! Mock [`ChainTip`]s for use in tests.
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use std::sync::Arc;
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use chrono::{DateTime, Utc};
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use tokio::sync::watch;
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use crate::{block, chain_tip::ChainTip, transaction};
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/// A sender to sets the values read by a [`MockChainTip`].
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pub struct MockChainTipSender {
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/// A sender that sets the `best_tip_height` of a [`MockChainTip`].
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best_tip_height: watch::Sender<Option<block::Height>>,
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/// A sender that sets the `best_tip_hash` of a [`MockChainTip`].
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best_tip_hash: watch::Sender<Option<block::Hash>>,
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/// A sender that sets the `best_tip_block_time` of a [`MockChainTip`].
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best_tip_block_time: watch::Sender<Option<DateTime<Utc>>>,
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}
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/// A mock [`ChainTip`] implementation that allows setting the `best_tip_height` externally.
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#[derive(Clone, Debug)]
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pub struct MockChainTip {
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/// A mocked `best_tip_height` value set by the [`MockChainTipSender`].
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best_tip_height: watch::Receiver<Option<block::Height>>,
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/// A mocked `best_tip_hash` value set by the [`MockChainTipSender`].
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best_tip_hash: watch::Receiver<Option<block::Hash>>,
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/// A mocked `best_tip_height` value set by the [`MockChainTipSender`].
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best_tip_block_time: watch::Receiver<Option<DateTime<Utc>>>,
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}
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impl MockChainTip {
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/// Create a new [`MockChainTip`].
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///
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/// Returns the [`MockChainTip`] instance and the endpoint to modiy the current best tip
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/// height.
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///
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/// Initially, the best tip height is [`None`].
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pub fn new() -> (Self, MockChainTipSender) {
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let (height_sender, height_receiver) = watch::channel(None);
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let (hash_sender, hash_receiver) = watch::channel(None);
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let (time_sender, time_receiver) = watch::channel(None);
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let mock_chain_tip = MockChainTip {
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best_tip_height: height_receiver,
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best_tip_hash: hash_receiver,
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best_tip_block_time: time_receiver,
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};
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let mock_chain_tip_sender = MockChainTipSender {
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best_tip_height: height_sender,
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best_tip_hash: hash_sender,
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best_tip_block_time: time_sender,
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};
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(mock_chain_tip, mock_chain_tip_sender)
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}
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}
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impl ChainTip for MockChainTip {
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fn best_tip_height(&self) -> Option<block::Height> {
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*self.best_tip_height.borrow()
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}
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fn best_tip_hash(&self) -> Option<block::Hash> {
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*self.best_tip_hash.borrow()
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}
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fn best_tip_height_and_hash(&self) -> Option<(block::Height, block::Hash)> {
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let height = (*self.best_tip_height.borrow())?;
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let hash = (*self.best_tip_hash.borrow())?;
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Some((height, hash))
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}
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fn best_tip_block_time(&self) -> Option<DateTime<Utc>> {
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*self.best_tip_block_time.borrow()
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}
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fn best_tip_height_and_block_time(&self) -> Option<(block::Height, DateTime<Utc>)> {
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let height = (*self.best_tip_height.borrow())?;
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let block_time = (*self.best_tip_block_time.borrow())?;
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Some((height, block_time))
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}
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fn best_tip_mined_transaction_ids(&self) -> Arc<[transaction::Hash]> {
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unreachable!("Method not used in tests");
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}
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}
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impl MockChainTipSender {
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/// Send a new best tip height to the [`MockChainTip`].
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pub fn send_best_tip_height(&self, height: impl Into<Option<block::Height>>) {
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self.best_tip_height
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.send(height.into())
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.expect("attempt to send a best tip height to a dropped `MockChainTip`");
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}
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/// Send a new best tip hash to the [`MockChainTip`].
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pub fn send_best_tip_hash(&self, hash: impl Into<Option<block::Hash>>) {
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self.best_tip_hash
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.send(hash.into())
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.expect("attempt to send a best tip hash to a dropped `MockChainTip`");
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}
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/// Send a new best tip block time to the [`MockChainTip`].
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pub fn send_best_tip_block_time(&self, block_time: impl Into<Option<DateTime<Utc>>>) {
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self.best_tip_block_time
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.send(block_time.into())
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.expect("attempt to send a best tip block time to a dropped `MockChainTip`");
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}
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}
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