/// <summary>
/// Response to indexing request from main 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 IndexServerStreaming(RequestBlockInfo request,
IServerStreamWriter <ResponseSideChainBlockInfo> responseStream, ServerCallContext context)
{
// TODO: verify the from address and the chain
_logger?.Debug("Side Chain Server received IndexedInfo message.");
try
{
var height = request.NextHeight;
while (height <= await LightChain.GetCurrentBlockHeightAsync())
{
var blockHeader = await LightChain.GetHeaderByHeightAsync(height);
var res = new ResponseSideChainBlockInfo
{
Success = blockHeader != null,
BlockInfo = blockHeader == null ? null : new SideChainBlockInfo
{
Height = height,
BlockHeaderHash = blockHeader.GetHash(),
TransactionMKRoot = blockHeader.MerkleTreeRootOfTransactions,
ChainId = blockHeader.ChainId
}
};
//_logger?.Log(LogLevel.Debug, $"Side Chain Server responsed IndexedInfo message of height {height}");
await responseStream.WriteAsync(res);
height++;
}
}
catch (Exception e)
{
_logger?.Error(e, "Exception while index server streaming.");
}
}
/// <summary>
/// Response to indexing request from main 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 IndexDuplexStreaming(IAsyncStreamReader <RequestBlockInfo> requestStream,
IServerStreamWriter <ResponseSideChainBlockInfo> responseStream, ServerCallContext context)
{
// TODO: verify the from address and the chain
_logger?.Debug("Side Chain Server received IndexedInfo message.");
try
{
while (await requestStream.MoveNext())
{
var requestInfo = requestStream.Current;
var requestedHeight = requestInfo.NextHeight;
var currentHeight = await LightChain.GetCurrentBlockHeightAsync();
if (currentHeight - requestedHeight < (ulong)GlobalConfig.InvertibleChainHeight)
{
await responseStream.WriteAsync(new ResponseSideChainBlockInfo
{
Success = false
});
continue;
}
var blockHeader = await LightChain.GetHeaderByHeightAsync(requestedHeight);
var res = new ResponseSideChainBlockInfo
{
Success = blockHeader != null,
BlockInfo = blockHeader == null ? null : new SideChainBlockInfo
{
Height = requestedHeight,
BlockHeaderHash = blockHeader.GetHash(),
TransactionMKRoot = blockHeader.MerkleTreeRootOfTransactions,
ChainId = blockHeader.ChainId
}
};
await responseStream.WriteAsync(res);
}
}
catch (Exception e)
{
_logger?.Error(e, "Side chain server out of service with exception.");
}
}
