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12 changes: 4 additions & 8 deletions crates/artemis-core/src/collectors/block_collector.rs
Original file line number Diff line number Diff line change
Expand Up @@ -4,22 +4,21 @@ use async_trait::async_trait;
use ethers::{
prelude::Middleware,
providers::PubsubClient,
types::{H256, U64},
types::{Block, TxHash},
};
use std::sync::Arc;
use tokio_stream::StreamExt;

/// A collector that listens for new blocks, and generates a stream of
/// [events](NewBlock) which contain the block number and hash.
/// [events](NewBlock) which contain the entire block
pub struct BlockCollector<M> {
provider: Arc<M>,
}

/// A new block event, containing the block number and hash.
#[derive(Debug, Clone)]
pub struct NewBlock {
pub hash: H256,
pub number: U64,
pub block: Block<TxHash>,
}

impl<M> BlockCollector<M> {
Expand All @@ -39,10 +38,7 @@ where
{
async fn get_event_stream(&self) -> Result<CollectorStream<'_, NewBlock>> {
let stream = self.provider.subscribe_blocks().await?;
let stream = stream.filter_map(|block| match block.hash {
Some(hash) => block.number.map(|number| NewBlock { hash, number }),
None => None,
});
let stream = stream.filter_map(|block| Some(NewBlock { block }));
Ok(Box::pin(stream))
}
}
2 changes: 1 addition & 1 deletion crates/artemis-core/tests/main.rs
Original file line number Diff line number Diff line change
Expand Up @@ -35,7 +35,7 @@ async fn test_block_collector_sends_blocks() {
.await
.unwrap()
.unwrap();
assert_eq!(block_a.hash, block_b.hash.unwrap());
assert_eq!(block_a.block.hash.unwrap(), block_b.hash.unwrap());
}

/// Test that mempool collector correctly emits blocks.
Expand Down
12 changes: 9 additions & 3 deletions crates/strategies/opensea-sudo-arb/src/strategy.rs
Original file line number Diff line number Diff line change
Expand Up @@ -156,14 +156,20 @@ impl<M: Middleware + 'static> OpenseaSudoArb<M> {

/// Process new block events, updating the internal state.
async fn process_new_block_event(&mut self, event: NewBlock) -> Result<()> {
info!("processing new block {}", event.number);
info!("processing new block {}", event.block.number.unwrap());
// Find new pools tthat were created in the last block.
let new_pools = self
.get_new_pools(event.number.as_u64(), event.number.as_u64())
.get_new_pools(
event.block.number.unwrap().as_u64(),
event.block.number.unwrap().as_u64(),
)
.await?;
// Find existing pools that were touched in the last block.
let touched_pools = self
.get_touched_pools(event.number.as_u64(), event.number.as_u64())
.get_touched_pools(
event.block.number.unwrap().as_u64(),
event.block.number.unwrap().as_u64(),
)
.await?;
// Get quotes for all new and touched pools and update state.
let quotes = self
Expand Down