protected virtual async Task OnSubscribeAsync(StratumConnection connection, Timestamped <JsonRpcRequest> tsRequest)
{
var request = tsRequest.Value;
if (request.Id == null)
{
throw new StratumException(StratumError.MinusOne, "missing request id");
}
var context = connection.ContextAs <BitcoinWorkerContext>();
var requestParams = request.ParamsAs <string[]>();
var data = new object[]
{
new object[]
{
new object[] { BitcoinStratumMethods.SetDifficulty, connection.ConnectionId },
new object[] { BitcoinStratumMethods.MiningNotify, connection.ConnectionId }
}
}
.Concat(manager.GetSubscriberData(connection))
.ToArray();
await connection.RespondAsync(data, request.Id);
// setup worker context
context.IsSubscribed = true;
context.UserAgent = requestParams.FirstOrDefault()?.Trim();
// Nicehash support
var nicehashDiff = await GetNicehashStaticMinDiff(context, coin.Name, coin.GetAlgorithmName());
if (nicehashDiff.HasValue)
{
logger.Info(() => $"[{connection.ConnectionId}] Nicehash detected. Using API supplied difficulty of {nicehashDiff.Value}");
context.VarDiff = null; // disable vardiff
context.SetDifficulty(nicehashDiff.Value);
}
// send intial update
await connection.NotifyAsync(BitcoinStratumMethods.SetDifficulty, new object[] { context.Difficulty });
await connection.NotifyAsync(BitcoinStratumMethods.MiningNotify, currentJobParams);
}
protected virtual async Task OnAuthorizeAsync(StratumConnection connection, Timestamped <JsonRpcRequest> tsRequest, CancellationToken ct)
{
var request = tsRequest.Value;
if (request.Id == null)
{
throw new StratumException(StratumError.MinusOne, "missing request id");
}
var context = connection.ContextAs <BitcoinWorkerContext>();
var requestParams = request.ParamsAs <string[]>();
var workerValue = requestParams?.Length > 0 ? requestParams[0] : null;
var password = requestParams?.Length > 1 ? requestParams[1] : null;
var passParts = password?.Split(PasswordControlVarsSeparator);
// extract worker/miner
var split = workerValue?.Split('.');
var minerName = split?.FirstOrDefault()?.Trim();
var workerName = split?.Skip(1).FirstOrDefault()?.Trim() ?? string.Empty;
// assumes that minerName is an address
context.IsAuthorized = await manager.ValidateAddressAsync(minerName, ct);
context.Miner = minerName;
context.Worker = workerName;
if (context.IsAuthorized)
{
// respond
await connection.RespondAsync(context.IsAuthorized, request.Id);
// log association
logger.Info(() => $"[{connection.ConnectionId}] Authorized worker {workerValue}");
// extract control vars from password
var staticDiff = GetStaticDiffFromPassparts(passParts);
// Nicehash support
staticDiff = await GetNicehashStaticMinDiff(connection, context.UserAgent, staticDiff, coin.Name, coin.GetAlgorithmName());
// Static diff
if (staticDiff.HasValue &&
(context.VarDiff != null && staticDiff.Value >= context.VarDiff.Config.MinDiff ||
context.VarDiff == null && staticDiff.Value > context.Difficulty))
{
context.VarDiff = null; // disable vardiff
context.SetDifficulty(staticDiff.Value);
logger.Info(() => $"[{connection.ConnectionId}] Setting static difficulty of {staticDiff.Value}");
await connection.NotifyAsync(BitcoinStratumMethods.SetDifficulty, new object[] { context.Difficulty });
}
}
else
{
await connection.RespondErrorAsync(StratumError.UnauthorizedWorker, "Authorization failed", request.Id, context.IsAuthorized);
// issue short-time ban if unauthorized to prevent DDos on daemon (validateaddress RPC)
logger.Info(() => $"[{connection.ConnectionId}] Banning unauthorized worker {minerName} for {loginFailureBanTimeout.TotalSeconds} sec");
banManager.Ban(connection.RemoteEndpoint.Address, loginFailureBanTimeout);
CloseConnection(connection);
}
}
protected virtual async Task OnAuthorizeAsync(StratumConnection connection, Timestamped <JsonRpcRequest> tsRequest, CancellationToken ct)
{
var request = tsRequest.Value;
if (request.Id == null)
{
throw new StratumException(StratumError.MinusOne, "missing request id");
}
var context = connection.ContextAs <BitcoinWorkerContext>();
var requestParams = request.ParamsAs <string[]>();
var workerValue = requestParams?.Length > 0 ? requestParams[0] : null;
var password = requestParams?.Length > 1 ? requestParams[1] : null;
var passParts = password?.Split(PasswordControlVarsSeparator);
// extract worker/miner
var split = workerValue?.Split('.');
var minerName = split?.FirstOrDefault()?.Trim();
var workerName = split?.Skip(1).FirstOrDefault()?.Trim() ?? string.Empty;
// assumes that minerName is an address
context.IsAuthorized = !string.IsNullOrEmpty(minerName) && await manager.ValidateAddressAsync(minerName, ct);
context.Miner = minerName;
context.Worker = workerName;
if (context.IsAuthorized)
{
// respond
await connection.RespondAsync(context.IsAuthorized, request.Id);
// log association
logger.Info(() => $"[{connection.ConnectionId}] Authorized worker {workerValue}");
// extract control vars from password
var staticDiff = GetStaticDiffFromPassparts(passParts);
// Nicehash support
if (clusterConfig.Nicehash?.EnableAutoDiff == true &&
context.UserAgent.Contains(NicehashConstants.NicehashUA, StringComparison.OrdinalIgnoreCase))
{
// query current diff
var nicehashDiff = await nicehashService.GetStaticDiff(coin.Name, coin.GetAlgorithmName(), CancellationToken.None);
if (nicehashDiff.HasValue)
{
if (!staticDiff.HasValue || nicehashDiff > staticDiff)
{
logger.Info(() => $"[{connection.ConnectionId}] Nicehash detected. Using API supplied difficulty of {nicehashDiff.Value}");
staticDiff = nicehashDiff;
}
else
{
logger.Info(() => $"[{connection.ConnectionId}] Nicehash detected. Using custom difficulty of {staticDiff.Value}");
}
}
}
// Static diff
if (staticDiff.HasValue &&
(context.VarDiff != null && staticDiff.Value >= context.VarDiff.Config.MinDiff ||
context.VarDiff == null && staticDiff.Value > context.Difficulty))
{
context.VarDiff = null; // disable vardiff
context.SetDifficulty(staticDiff.Value);
logger.Info(() => $"[{connection.ConnectionId}] Setting static difficulty of {staticDiff.Value}");
await connection.NotifyAsync(BitcoinStratumMethods.SetDifficulty, new object[] { context.Difficulty });
}
}
else
{
// respond
await connection.RespondErrorAsync(StratumError.UnauthorizedWorker, "Authorization failed", request.Id, context.IsAuthorized);
// issue short-time ban if unauthorized to prevent DDos on daemon (validateaddress RPC)
logger.Info(() => $"[{connection.ConnectionId}] Banning unauthorized worker for 60 sec");
banManager.Ban(connection.RemoteEndpoint.Address, TimeSpan.FromSeconds(60));
CloseConnection(connection);
}
}
