/// <summary>
/// Mock a chain with a best branch, and some fork branches
/// </summary>
/// <returns>
/// Mock Chain
/// BestChainHeight: 11
/// LongestChainHeight: 13
/// LIB height: 5
///
/// Height: 1 -> 2 -> 3 -> 4 -> 5 -> 6 -> 7 -> 8 -> 9 -> 10 -> 11 -> 12 -> 13 -> 14 -> 15 -> 16 -> 17 -> 18 -> 19
/// Best Branch: a -> b -> c -> d -> e -> f -> g -> h -> i -> j -> k
/// Longest Branch: (h)-> l -> m -> n -> o -> p -> q -> r -> s -> t -> u -> v
/// Fork Branch: (e)-> q -> r -> s -> t -> u
/// Unlinked Branch: v -> w -> x -> y -> z
/// </returns>
public async Task <Chain> MockChainAsync()
{
var chain = await CreateChain();
var genesisBlock = await _blockchainService.GetBlockByHashAsync(chain.GenesisBlockHash);
BestBranchBlockList.Add(genesisBlock);
BestBranchBlockList.AddRange(await AddBestBranch());
LongestBranchBlockList =
await AddForkBranch(BestBranchBlockList[7].Height, BestBranchBlockList[7].GetHash(), 11);
foreach (var block in LongestBranchBlockList)
{
var chainBlockLink = await _chainManager.GetChainBlockLinkAsync(block.GetHash());
await _chainManager.SetChainBlockLinkExecutionStatusAsync(chainBlockLink,
ChainBlockLinkExecutionStatus.ExecutionFailed);
}
ForkBranchBlockList =
await AddForkBranch(BestBranchBlockList[4].Height, BestBranchBlockList[4].GetHash());
UnlinkedBranchBlockList = await AddForkBranch(9, Hash.FromString("UnlinkBlock"));
// Set lib
chain = await _blockchainService.GetChainAsync();
await _blockchainService.SetIrreversibleBlockAsync(chain, BestBranchBlockList[4].Height,
BestBranchBlockList[4].GetHash());
return(chain);
}
public async Task <List <ChainBlockLink> > ExecuteBlocksAttachedToLongestChain(Chain chain,
BlockAttachOperationStatus status)
{
if (!status.HasFlag(BlockAttachOperationStatus.LongestChainFound))
{
Logger.LogTrace($"Try to attach to chain but the status is {status}.");
return(null);
}
var successLinks = new List <ChainBlockLink>();
var successBlocks = new List <Block>();
var blockLinks = await _chainManager.GetNotExecutedBlocks(chain.LongestChainHash);
try
{
foreach (var blockLink in blockLinks)
{
var linkedBlock = await _blockchainService.GetBlockByHashAsync(blockLink.BlockHash);
var processResult = await TryProcessBlockAsync(linkedBlock);
if (!processResult)
{
await _chainManager.SetChainBlockLinkExecutionStatusAsync(blockLink,
ChainBlockLinkExecutionStatus.ExecutionFailed);
await _chainManager.RemoveLongestBranchAsync(chain);
return(null);
}
successLinks.Add(blockLink);
successBlocks.Add(linkedBlock);
Logger.LogInformation(
$"Executed block {blockLink.BlockHash} at height {blockLink.Height}, with {linkedBlock.Body.TransactionsCount} txns.");
await LocalEventBus.PublishAsync(new BlockAcceptedEvent { Block = linkedBlock });
}
}
catch (BlockValidationException ex)
{
if (!(ex.InnerException is ValidateNextTimeBlockValidationException))
{
await _chainManager.RemoveLongestBranchAsync(chain);
throw;
}
Logger.LogWarning(
$"Block validation failed: {ex.Message}. Inner exception {ex.InnerException.Message}");
}
catch (Exception ex)
{
await _chainManager.RemoveLongestBranchAsync(chain);
Logger.LogWarning($"Block validate or execute fails. Exception message {ex.Message}");
throw;
}
if (successLinks.Count == 0 || successLinks.Last().Height < chain.BestChainHeight)
{
Logger.LogWarning("No block execution succeed or no block is higher than best chain.");
await _chainManager.RemoveLongestBranchAsync(chain);
return(null);
}
await SetBestChainAsync(successLinks, chain);
await _chainManager.SetChainBlockLinkExecutionStatusesAsync(successLinks,
ChainBlockLinkExecutionStatus.ExecutionSuccess);
await PublishBestChainFoundEventAsync(chain, successBlocks);
Logger.LogInformation(
$"Attach blocks to best chain, status: {status}, best chain hash: {chain.BestChainHash}, height: {chain.BestChainHeight}");
return(blockLinks);
}
public async Task SetChainBlockLinkExecutionStatusAsync(Hash blockHash, ChainBlockLinkExecutionStatus status)
{
var chainBlockLink = await _chainManager.GetChainBlockLinkAsync(blockHash);
await _chainManager.SetChainBlockLinkExecutionStatusAsync(chainBlockLink, status);
}