public IPublicConsensusKeySet?GetValidators(long afterBlock)
{
Logger.LogTrace($"Getting validators after block {afterBlock}");
try
{
var state = _snapshotIndexRepository.GetSnapshotForBlock((ulong)afterBlock).Validators
.GetConsensusState();
var n = state.Validators.Length;
var f = (n - 1) / 3;
Logger.LogTrace($"Fetched {n} validators f={f}");
return(new PublicConsensusKeySet(
n, f,
PublicKey.FromBytes(state.TpkePublicKey),
new PublicKeySet(
state.Validators.Select(v =>
Crypto.ThresholdSignature.PublicKey.FromBytes(v.ThresholdSignaturePublicKey)),
f
),
state.Validators.Select(v => v.PublicKey)
));
}
catch (Exception)
{
// ignored
}
return(null);
}
private IBlockchainSnapshot?GetSnapshotByTag(string tag)
{
switch (tag)
{
case "latest":
return(_stateManager.LastApprovedSnapshot);
case "earliest":
return(_snapshotIndexer.GetSnapshotForBlock(0));
case "pending":
return(_stateManager.PendingSnapshot);
default:
{
var blockNum = tag.HexToUlong();
try
{
return(_snapshotIndexer.GetSnapshotForBlock(blockNum));
}
catch (Exception e)
{
throw new Exception("Block with " + tag + " doesn't exist.");
}
}
}
}
private void CheckSnapshots(ulong depth, ulong totalBlocks)
{
var fromBlock = StartingBlockToKeep(depth, totalBlocks);
Logger.LogTrace($"Checking snapshots for blocks in range [{fromBlock} , {totalBlocks}]");
for (var block = fromBlock; block <= totalBlocks; block++)
{
try
{
var blockchainSnapshot = _snapshotIndexRepository.GetSnapshotForBlock(block);
var snapshots = blockchainSnapshot.GetAllSnapshot();
foreach (var snapshot in snapshots)
{
if (!snapshot.IsTrieNodeHashesOk())
{
throw new Exception($"Consistency check failed for {snapshot} of block {block}");
}
}
}
catch (Exception exception)
{
throw new Exception($"Got exception trying to get snapshot for block {block}, "
+ $"exception:\n{exception}");
}
}
}
public JObject?GetStateByNumber(string blockTag)
{
var blockNumber = GetBlockNumberByTag(blockTag);
if (blockNumber == null)
{
return(null);
}
IBlockchainSnapshot blockchainSnapshot = _snapshotIndexer.GetSnapshotForBlock((ulong)blockNumber);
var state = new JObject {
};
string[] trieNames = new string[] { "Balances", "Contracts", "Storage", "Transactions", "Blocks", "Events", "Validators" };
ISnapshot[] snapshots = blockchainSnapshot.GetAllSnapshot();
for (var i = 0; i < trieNames.Length; i++)
{
state[trieNames[i]] = Web3DataFormatUtils.Web3Trie(snapshots[i].GetState());
state[trieNames[i] + "Root"] = Web3DataFormatUtils.Web3Number(snapshots[i].Version);
}
return(state);
}
private bool VerifyValidatorSet(IReadOnlyCollection <ECDSAPublicKey> keys, ulong height)
{
try
{
IReadOnlyCollection <ECDSAPublicKey> validators = _snapshotIndexRepository.GetSnapshotForBlock(height).Validators
.GetValidatorsPublicKeys().ToArray();
var result = validators.All(v => keys.Contains(v)) && keys.All(k => validators.Contains(k));
if (!result)
{
Logger.LogDebug("Validator set from peer block does not match with validator set from snapshot");
}
return(result);
}
catch (Exception exception)
{
Logger.LogTrace($"Got exception while matching validator set: {exception}");
return(false);
}
}
