/// <summary>
/// Response to recording request from side chain node.
/// One request to many responses.
/// </summary>
/// <param name="request"></param>
/// <param name="responseStream"></param>
/// <param name="context"></param>
/// <returns></returns>
public override async Task RecordServerStreaming(RequestBlockInfo request, IServerStreamWriter <ResponseParentChainBlockInfo> responseStream, ServerCallContext context)
{
_logger?.Trace("Parent Chain Server received IndexedInfo message.");
try
{
var height = request.NextHeight;
var sideChainId = request.ChainId;
while (height <= await BlockChain.GetCurrentBlockHeightAsync())
{
IBlock block = await BlockChain.GetBlockByHeightAsync(height);
BlockHeader header = block?.Header;
BlockBody body = block?.Body;
var res = new ResponseParentChainBlockInfo
{
Success = block != null
};
if (res.Success)
{
res.BlockInfo = new ParentChainBlockInfo
{
Root = new ParentChainBlockRootInfo
{
Height = height,
SideChainBlockHeadersRoot = header?.SideChainBlockHeadersRoot,
SideChainTransactionsRoot = header?.SideChainTransactionsRoot,
ChainId = header?.ChainId
}
};
var tree = await _binaryMerkleTreeManager
.GetSideChainTransactionRootsMerkleTreeByHeightAsync(header?.ChainId, height);
//Todo: this is to tell side chain the height of side chain block in this main chain block, which could be removed with subsequent improvement.
body?.IndexedInfo.Where(predicate: i => i.ChainId.Equals(sideChainId))
.Select((info, index) =>
new KeyValuePair <ulong, MerklePath>(info.Height, tree.GenerateMerklePath(index)))
.ForEach(kv => res.BlockInfo.IndexedBlockInfo.Add(kv.Key, kv.Value));
}
//_logger?.Log(LogLevel.Trace, $"Parent Chain Server responsed IndexedInfo message of height {height}");
await responseStream.WriteAsync(res);
height++;
}
}
catch (Exception e)
{
_logger?.Error(e, "Miner server RecordDuplexStreaming failed.");
}
}
/// <summary>
/// Response to recording request from side chain node.
/// Many requests to many responses.
/// </summary>
/// <param name="requestStream"></param>
/// <param name="responseStream"></param>
/// <param name="context"></param>
/// <returns></returns>
public override async Task RecordDuplexStreaming(IAsyncStreamReader <RequestBlockInfo> requestStream,
IServerStreamWriter <ResponseParentChainBlockInfo> responseStream, ServerCallContext context)
{
_logger?.Debug("Parent Chain Server received IndexedInfo message.");
try
{
while (await requestStream.MoveNext())
{
var requestInfo = requestStream.Current;
var requestedHeight = requestInfo.NextHeight;
var sideChainId = requestInfo.ChainId;
var currentHeight = await BlockChain.GetCurrentBlockHeightAsync();
if (currentHeight - requestedHeight < (ulong)GlobalConfig.InvertibleChainHeight)
{
await responseStream.WriteAsync(new ResponseParentChainBlockInfo
{
Success = false
});
continue;
}
IBlock block = await BlockChain.GetBlockByHeightAsync(requestedHeight);
BlockHeader header = block?.Header;
BlockBody body = block?.Body;
var res = new ResponseParentChainBlockInfo
{
Success = block != null
};
if (res.Success)
{
res.BlockInfo = new ParentChainBlockInfo
{
Root = new ParentChainBlockRootInfo
{
Height = requestedHeight,
SideChainBlockHeadersRoot = header?.SideChainBlockHeadersRoot,
SideChainTransactionsRoot = header?.SideChainTransactionsRoot,
ChainId = header?.ChainId
}
};
var tree = await _binaryMerkleTreeManager
.GetSideChainTransactionRootsMerkleTreeByHeightAsync(header?.ChainId, requestedHeight);
if (tree != null)
{
//Todo: this is to tell side chain the merkle path for one side chain block, which could be removed with subsequent improvement.
/*body?.IndexedInfo.Where(predicate: i => i.ChainId.Equals(sideChainId))
* .Select((info, index) =>
* new KeyValuePair<ulong, MerklePath>(info.Height, tree.GenerateMerklePath(index)))
* .ForEach(kv => res.BlockInfo.IndexedBlockInfo.Add(kv.Key, kv.Value));*/
for (int i = 0; i < body?.IndexedInfo.Count; i++)
{
var info = body.IndexedInfo[i];
if (!info.ChainId.Equals(sideChainId))
{
continue;
}
var merklePath = tree.GenerateMerklePath(i);
if (merklePath == null)
{
_logger?.Trace($"tree.Root == null: {tree.Root == null}");
_logger?.Trace($"tree.LeafCount = {tree.LeafCount}, index = {i}");
}
res.BlockInfo.IndexedBlockInfo.Add(info.Height, merklePath);
}
}
}
await responseStream.WriteAsync(res);
}
}
catch (Exception e)
{
_logger?.Error(e, "Miner server RecordDuplexStreaming failed.");
}
}