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Avoid unnecessary slashing protection when publishing blocks (#3188)

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## Issue Addressed

#3141 

## Proposed Changes

Changes the algorithm for proposing blocks from

```
For each BN (first success):
   - Produce a block
   - Sign the block and store its root in the slashing protection DB
   - Publish the block
```
to
```
For each BN (first success):
   - Produce a block
Sign the block and store its root in the slashing protection DB
For each BN (first success):
   - Publish the block
```

Separating the producing from the publishing makes sure that we only add a signed block once to the slashing DB.
This commit is contained in:
tim gretler 2022-05-18 06:50:51 +00:00
parent 0428018cc1
commit 053625f113
1 changed files with 23 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
validator_client/src/block_service.rs
View File

@ -328,7 +328,8 @@ impl<T: SlotClock + 'static, E: EthSpec> BlockService<T, E> {
let self_ref = &self;
let proposer_index = self.validator_store.validator_index(&validator_pubkey);
let validator_pubkey_ref = &validator_pubkey;
let signed_block = self
// Request block from first responsive beacon node.
let block = self
.beacon_nodes
.first_success(RequireSynced::No, |beacon_node| async move {
let get_timer = metrics::start_timer_vec(
@ -378,14 +379,19 @@ impl<T: SlotClock + 'static, E: EthSpec> BlockService<T, E> {
));
}
let signed_block = self_ref
.validator_store
.sign_block::<Payload>(*validator_pubkey_ref, block, current_slot)
.await
.map_err(|e| {
BlockError::Recoverable(format!("Unable to sign block: {:?}", e))
})?;
Ok::<_, BlockError>(block)
})
.await?;
let signed_block = self_ref
.validator_store
.sign_block::<Payload>(*validator_pubkey_ref, block, current_slot)
.await
.map_err(|e| BlockError::Recoverable(format!("Unable to sign block: {:?}", e)))?;
// Publish block with first available beacon node.
self.beacon_nodes
.first_success(RequireSynced::No, |beacon_node| async {
let _post_timer = metrics::start_timer_vec(
&metrics::BLOCK_SERVICE_TIMES,
&[metrics::BEACON_BLOCK_HTTP_POST],
@ -412,19 +418,17 @@ impl<T: SlotClock + 'static, E: EthSpec> BlockService<T, E> {
})?,
}
Ok::<_, BlockError>(signed_block)
info!(
log,
"Successfully published block";
"deposits" => signed_block.message().body().deposits().len(),
"attestations" => signed_block.message().body().attestations().len(),
"graffiti" => ?graffiti.map(|g| g.as_utf8_lossy()),
"slot" => signed_block.slot().as_u64(),
);
Ok::<_, BlockError>(())
})
.await?;
info!(
log,
"Successfully published block";
"deposits" => signed_block.message().body().deposits().len(),
"attestations" => signed_block.message().body().attestations().len(),
"graffiti" => ?graffiti.map(|g| g.as_utf8_lossy()),
"slot" => signed_block.slot().as_u64(),
);
Ok(())
}
}