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Separate parent block checking and proposer checking

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This commit is contained in:
Paul Hauner 2018-10-04 15:43:17 +10:00
parent c30a9a7565
commit e2d45eafae
No known key found for this signature in database
GPG Key ID: 303E4494BB28068C
1 changed files with 24 additions and 19 deletions
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43
beacon_chain/validation/src/block_validation.rs
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@ -181,6 +181,23 @@ impl<T> BlockValidationContext<T>
return Err(SszBlockValidationError::ProposerAttestationHasObliqueHashes);
}
/*
* Read the parent hash from the block we are validating then attempt to load
* that parent block ssz from the database.
*
* If that parent doesn't exist in the database or is invalid, reject the block.
*
* Also, read the slot from the parent block for later use.
*/
let parent_hash = b.parent_hash();
let parent_slot = match self.block_store.get_serialized_block(&parent_hash)? {
None => return Err(SszBlockValidationError::UnknownParentHash),
Some(ssz) => {
let parent_block = SszBlock::from_slice(&ssz[..])?;
parent_block.slot_number()
}
};
/*
* Generate the context in which attestations will be validated.
*/
@ -201,28 +218,16 @@ impl<T> BlockValidationContext<T>
.validate_attestation(&first_attestation)?;
/*
* Read the parent hash from the block we are validating then attempt to load
* the parent block ssz from the database. If that parent doesn't exist in
* the database, reject the block.
* Attempt to read load the parent block proposer from the proposer map. Return with an
* error if it fails.
*
* If the parent does exist in the database, read the slot of that parent. Then,
* determine the proposer of that slot (the parent slot) by looking it up
* in the proposer map.
*
* If that proposer (the proposer of the parent block) was not present in the first (0'th)
* If the signature of proposer for the parent slot was not present in the first (0'th)
* attestation of this block, reject the block.
*/
let parent_hash = b.parent_hash();
match self.block_store.get_serialized_block(&parent_hash)? {
None => return Err(SszBlockValidationError::UnknownParentHash),
Some(ssz) => {
let parent_block = SszBlock::from_slice(&ssz[..])?;
let proposer = self.proposer_map.get(&parent_block.slot_number())
.ok_or(SszBlockValidationError::BadProposerMap)?;
if !attestation_voters.contains(&proposer) {
return Err(SszBlockValidationError::NoProposerSignature);
}
}
let parent_block_proposer = self.proposer_map.get(&parent_slot)
.ok_or(SszBlockValidationError::BadProposerMap)?;
if !attestation_voters.contains(&parent_block_proposer) {
return Err(SszBlockValidationError::NoProposerSignature);
}
/*