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PoA warp implementation (#5488)

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* separate modules for consensus snapshot chunks

* bulk of authority warp logic

* finish authority warp implementation

* squash warnings and enable authority snapshot mode

* test harness for PoA

* fiddle with harness

* epoch generation proof fixes

* update constructor code

* store epoch transition proof after block commit

* basic snap and restore test

* use keyvaluedb in state restoration

* decompress chunks

* fix encoding issues

* fixed-to-contract-to-contract test

* implement ancient block import

* restore genesis transition in PoW snapshot

* add format version method to snapshot components

* supported version numbers in snapshot_components

* allow returning of ancient epoch transitions

* genesis hash mismatch check

* remove commented code
This commit is contained in:
Robert Habermeier
2017-05-17 12:41:33 +02:00
committed by keorn
parent 5d973f8ef5
commit 4c5e4ac8da
35 changed files with 1547 additions and 347 deletions
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18
ethcore/src/blockchain/blockchain.rs
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@@ -445,7 +445,12 @@ impl<'a> Iterator for EpochTransitionIter<'a> {
let is_in_canon_chain = self.chain.block_hash(transition.block_number)
.map_or(false, |hash| hash == transition.block_hash);
if is_in_canon_chain {
// if the transition is within the block gap, there will only be
// one candidate, and it will be from a snapshot restored from.
let is_ancient = self.chain.first_block_number()
.map_or(false, |first| first > transition.block_number);
if is_ancient || is_in_canon_chain {
return Some((transitions.number, transition))
}
}
@@ -864,6 +869,7 @@ impl BlockChain {
}
/// Iterate over all epoch transitions.
/// This will only return transitions within the canonical chain.
pub fn epoch_transitions(&self) -> EpochTransitionIter {
let iter = self.db.iter_from_prefix(db::COL_EXTRA, &EPOCH_KEY_PREFIX[..]);
EpochTransitionIter {
@@ -872,6 +878,16 @@ impl BlockChain {
}
}
/// Get a specific epoch transition by epoch number and provided block hash.
pub fn epoch_transition(&self, epoch_num: u64, block_hash: H256) -> Option<EpochTransition> {
trace!(target: "blockchain", "Loading epoch {} transition at block {}",
epoch_num, block_hash);
self.db.read(db::COL_EXTRA, &epoch_num).and_then(|transitions: EpochTransitions| {
transitions.candidates.into_iter().find(|c| c.block_hash == block_hash)
})
}
/// Add a child to a given block. Assumes that the block hash is in
/// the chain and the child's parent is this block.
///