private async Task OnGetJob(StratumClient client, Timestamped <JsonRpcRequest> tsRequest)
{
var request = tsRequest.Value;
var context = client.ContextAs <MoneroWorkerContext>();
if (request.Id == null)
{
await client.RespondErrorAsync(StratumError.MinusOne, "missing request id", request.Id);
return;
}
var getJobRequest = request.ParamsAs <MoneroGetJobRequest>();
// validate worker
if (client.ConnectionId != getJobRequest?.WorkerId || !context.IsAuthorized)
{
await client.RespondErrorAsync(StratumError.MinusOne, "unauthorized", request.Id);
return;
}
// respond
var job = CreateWorkerJob(client);
await client.RespondAsync(job, request.Id);
}
protected override async Task OnRequestAsync(StratumClient client,
Timestamped <JsonRpcRequest> tsRequest, CancellationToken ct)
{
var request = tsRequest.Value;
try
{
switch (request.Method)
{
case BitcoinStratumMethods.Subscribe:
await OnSubscribeAsync(client, tsRequest);
break;
case BitcoinStratumMethods.Authorize:
await OnAuthorizeAsync(client, tsRequest, ct);
break;
case BitcoinStratumMethods.SubmitShare:
await OnSubmitAsync(client, tsRequest, ct);
break;
case BitcoinStratumMethods.SuggestDifficulty:
await OnSuggestDifficultyAsync(client, tsRequest);
break;
case BitcoinStratumMethods.GetTransactions:
//OnGetTransactions(client, tsRequest);
// ignored
break;
case BitcoinStratumMethods.ExtraNonceSubscribe:
// ignored
break;
case BitcoinStratumMethods.MiningMultiVersion:
// ignored
break;
default:
logger.Debug(() => $"[{client.ConnectionId}] Unsupported RPC request: {JsonConvert.SerializeObject(request, serializerSettings)}");
await client.RespondErrorAsync(StratumError.Other, $"Unsupported request {request.Method}", request.Id);
break;
}
}
catch (StratumException ex)
{
await client.RespondErrorAsync(ex.Code, ex.Message, request.Id, false);
}
}
protected override async Task OnSubscribeAsync(StratumClient client, Timestamped <JsonRpcRequest> tsRequest)
{
var request = tsRequest.Value;
var context = client.ContextAs <BitcoinWorkerContext>();
if (request.Id == null)
{
await client.RespondErrorAsync(StratumError.Other, "missing request id", request.Id);
return;
}
var requestParams = request.ParamsAs <string[]>();
var data = new object[]
{
client.ConnectionId,
}
.Concat(manager.GetSubscriberData(client))
.ToArray();
await client.RespondAsync(data, request.Id);
// setup worker context
context.IsSubscribed = true;
context.UserAgent = requestParams?.Length > 0 ? requestParams[0].Trim() : null;
}
protected override async Task OnRequestAsync(StratumClient client,
Timestamped <JsonRpcRequest> tsRequest)
{
var request = tsRequest.Value;
switch (request.Method)
{
case EthereumStratumMethods.Subscribe:
await OnSubscribeAsync(client, tsRequest);
break;
case EthereumStratumMethods.Authorize:
await OnAuthorizeAsync(client, tsRequest);
break;
case EthereumStratumMethods.SubmitShare:
await OnSubmitAsync(client, tsRequest);
break;
case EthereumStratumMethods.ExtraNonceSubscribe:
//await client.RespondError(StratumError.Other, "not supported", request.Id, false);
break;
default:
logger.Debug(() => $"[{LogCat}] [{client.ConnectionId}] Unsupported RPC request: {JsonConvert.SerializeObject(request, serializerSettings)}");
await client.RespondErrorAsync(StratumError.Other, $"Unsupported request {request.Method}", request.Id);
break;
}
}
private async Task OnSuggestTargetAsync(StratumClient client, Timestamped <JsonRpcRequest> tsRequest)
{
var request = tsRequest.Value;
var context = client.ContextAs <BitcoinWorkerContext>();
if (request.Id == null)
{
await client.RespondErrorAsync(StratumError.Other, "missing request id", request.Id);
return;
}
var requestParams = request.ParamsAs <string[]>();
var target = requestParams.FirstOrDefault();
if (!string.IsNullOrEmpty(target))
{
if (System.Numerics.BigInteger.TryParse(target, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out var targetBig))
{
var newDiff = (double)new BigRational(chainConfig.Diff1b, targetBig);
var poolEndpoint = poolConfig.Ports[client.PoolEndpoint.Port];
if (newDiff >= poolEndpoint.Difficulty)
{
context.EnqueueNewDifficulty(newDiff);
context.ApplyPendingDifficulty();
await client.NotifyAsync(ZCashStratumMethods.SetTarget, new object[] { EncodeTarget(context.Difficulty) });
}
else
{
await client.RespondErrorAsync(StratumError.Other, "suggested difficulty too low", request.Id);
}
}
else
{
await client.RespondErrorAsync(StratumError.Other, "invalid target", request.Id);
}
}
else
{
await client.RespondErrorAsync(StratumError.Other, "invalid target", request.Id);
}
}
protected virtual async Task OnAuthorizeAsync(StratumClient client, Timestamped<JsonRpcRequest> tsRequest, CancellationToken ct)
{
var request = tsRequest.Value;
if (request.Id == null)
throw new StratumException(StratumError.MinusOne, "missing request id");
var context = client.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 workerName is an address
context.IsAuthorized = !string.IsNullOrEmpty(minerName) && await manager.ValidateAddressAsync(minerName, ct);
context.Miner = minerName;
context.Worker = workerName;
if (context.IsAuthorized)
{
// respond
await client.RespondAsync(context.IsAuthorized, request.Id);
// log association
logger.Info(() => $"[{client.ConnectionId}] Authorized worker {workerValue}");
// extract control vars from password
var staticDiff = GetStaticDiffFromPassparts(passParts);
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(() => $"[{client.ConnectionId}] Setting static difficulty of {staticDiff.Value}");
await client.NotifyAsync(BitcoinStratumMethods.SetDifficulty, new object[] { context.Difficulty });
}
}
else
{
// respond
await client.RespondErrorAsync(StratumError.UnauthorizedWorker, "Authorization failed", request.Id, context.IsAuthorized);
// issue short-time ban if unauthorized to prevent DDos on daemon (validateaddress RPC)
logger.Info(() => $"[{client.ConnectionId}] Banning unauthorized worker for 60 sec");
banManager.Ban(client.RemoteEndpoint.Address, TimeSpan.FromSeconds(60));
DisconnectClient(client);
}
}
protected override async Task OnRequestAsync(StratumClient client, Timestamped <JsonRpcRequest> tsRequest, CancellationToken ct)
{
var request = tsRequest.Value;
var context = client.ContextAs <CryptonoteWorkerContext>();
logger.Trace(() => $"[{client.ConnectionId}] RPC request: {JsonConvert.SerializeObject(request, serializerSettings)}");
try
{
switch (request.Method)
{
case CryptonoteStratumMethods.Login:
await OnLoginAsync(client, tsRequest);
break;
case CryptonoteStratumMethods.GetJob:
await OnGetJobAsync(client, tsRequest);
break;
case CryptonoteStratumMethods.Submit:
await OnSubmitAsync(client, tsRequest, ct);
break;
case CryptonoteStratumMethods.KeepAlive:
// recognize activity
context.LastActivity = clock.UtcNow;
break;
default:
logger.Info(() => $"[{client.ConnectionId}] Unsupported RPC request: {JsonConvert.SerializeObject(request, serializerSettings)}");
await client.RespondErrorAsync(StratumError.Other, $"Unsupported request {request.Method}", request.Id);
break;
}
}
catch (StratumException ex)
{
await client.RespondErrorAsync(ex.Code, ex.Message, request.Id, false);
}
}
private async Task OnSubscribeAsync(StratumClient client, Timestamped <JsonRpcRequest> tsRequest)
{
var request = tsRequest.Value;
var context = client.ContextAs <EthereumWorkerContext>();
if (request.Id == null)
{
await client.RespondErrorAsync(StratumError.Other, "missing request id", request.Id);
return;
}
var requestParams = request.ParamsAs <string[]>();
if (requestParams == null || requestParams.Length < 2 || requestParams.Any(string.IsNullOrEmpty))
{
await client.RespondErrorAsync(StratumError.MinusOne, "invalid request", request.Id);
return;
}
manager.PrepareWorker(client);
var data = new object[]
{
new object[]
{
EthereumStratumMethods.MiningNotify,
client.ConnectionId,
EthereumConstants.EthereumStratumVersion
},
context.ExtraNonce1
}
.ToArray();
await client.RespondAsync(data, request.Id);
// setup worker context
context.IsSubscribed = true;
context.UserAgent = requestParams[0].Trim();
}
private async Task OnAuthorizeAsync(StratumClient client, Timestamped <JsonRpcRequest> tsRequest)
{
var request = tsRequest.Value;
var context = client.ContextAs <EthereumWorkerContext>();
if (request.Id == null)
{
await client.RespondErrorAsync(StratumError.Other, "missing request id", request.Id);
return;
}
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 workerParts = workerValue?.Split('.');
var minerName = workerParts?.Length > 0 ? workerParts[0].Trim() : null;
var workerName = workerParts?.Length > 1 ? workerParts[1].Trim() : null;
// assumes that workerName is an address
context.IsAuthorized = !string.IsNullOrEmpty(minerName) && manager.ValidateAddress(minerName);
context.MinerName = minerName;
context.WorkerName = workerName;
// respond
await client.RespondAsync(context.IsAuthorized, request.Id);
// extract control vars from password
var staticDiff = GetStaticDiffFromPassparts(passParts);
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);
}
await EnsureInitialWorkSent(client);
// log association
logger.Info(() => $"[{LogCat}] [{client.ConnectionId}] = {workerValue} = {client.RemoteEndpoint.Address}");
}
protected async Task OnGetTransactions(StratumClient client, Timestamped <JsonRpcRequest> tsRequest)
{
var request = tsRequest.Value;
try
{
var transactions = manager.GetTransactions(client, request.ParamsAs <object[]>());
await client.RespondAsync(transactions, request.Id);
}
catch (StratumException ex)
{
await client.RespondErrorAsync(ex.Code, ex.Message, request.Id, false);
}
catch (Exception ex)
{
logger.Error(ex, () => $"[{LogCat}] Unable to convert suggested difficulty {request.Params}");
}
}
protected virtual async Task OnSubscribeAsync(StratumClient client, Timestamped <JsonRpcRequest> tsRequest)
{
var request = tsRequest.Value;
if (request.Id == null)
{
await client.RespondErrorAsync(StratumError.Other, "missing request id", request.Id);
return;
}
var context = client.ContextAs <BitcoinWorkerContext>();
var requestParams = request.ParamsAs <string[]>();
var data = new object[]
{
new object[]
{
new object[] { BitcoinStratumMethods.SetDifficulty, client.ConnectionId },
new object[] { BitcoinStratumMethods.MiningNotify, client.ConnectionId }
}
}
.Concat(manager.GetSubscriberData(client))
.ToArray();
await client.RespondAsync(data, request.Id);
// setup worker context
context.IsSubscribed = true;
context.UserAgent = requestParams?.Length > 0 ? requestParams[0].Trim() : null;
// send intial update
await client.NotifyAsync(BitcoinStratumMethods.SetDifficulty, new object[] { context.Difficulty });
await client.NotifyAsync(BitcoinStratumMethods.MiningNotify, currentJobParams);
}
protected override async Task OnRequestAsync(StratumClient client,
Timestamped <JsonRpcRequest> tsRequest)
{
var request = tsRequest.Value;
var context = client.ContextAs <MoneroWorkerContext>();
switch (request.Method)
{
case MoneroStratumMethods.Login:
await OnLoginAsync(client, tsRequest);
break;
case MoneroStratumMethods.GetJob:
await OnGetJob(client, tsRequest);
break;
case MoneroStratumMethods.Submit:
await OnSubmitAsync(client, tsRequest);
break;
case MoneroStratumMethods.KeepAlive:
// recognize activity
context.LastActivity = clock.Now;
break;
default:
logger.Debug(() => $"[{LogCat}] [{client.ConnectionId}] Unsupported RPC request: {JsonConvert.SerializeObject(request, serializerSettings)}");
await client.RespondErrorAsync(StratumError.Other, $"Unsupported request {request.Method}", request.Id);
break;
}
}
protected override async Task OnRequestAsync(StratumClient client,
Timestamped <JsonRpcRequest> tsRequest, CancellationToken ct)
{
var request = tsRequest.Value;
try
{
switch (request.Method)
{
#region EthereumStratum/1.0.0
case EthereumStratumMethods.Subscribe:
await OnSubscribeAsync(client, tsRequest);
break;
case EthereumStratumMethods.Authorize:
await OnAuthorizeAsync(client, tsRequest);
break;
case EthereumStratumMethods.SubmitShare:
await OnSubmitAsync(client, tsRequest, ct);
break;
case EthereumStratumMethods.ExtraNonceSubscribe:
await client.RespondErrorAsync(StratumError.Other, "not supported", request.Id, false);
break;
#endregion
#region Stratum-Proxy
case EthereumStratumMethods.SubmitLogin:
await OnSubmitLoginAsync(client, tsRequest);
break;
case EthereumStratumMethods.GetWork:
await OnGetWorkAsync(client, tsRequest);
break;
case EthereumStratumMethods.SubmitHasrate:
await OnSubmitHashrateAsync(client, tsRequest);
break;
case EthereumStratumMethods.SubmitWork:
await OnSubmitAsync(client, tsRequest, ct);
break;
#endregion
default:
logger.Debug(() => $"[{client.ConnectionId}] Unsupported RPC request: {JsonConvert.SerializeObject(request, serializerSettings)}");
await client.RespondErrorAsync(StratumError.Other, $"Unsupported request {request.Method}", request.Id);
break;
}
}
catch (StratumException ex)
{
await client.RespondErrorAsync(ex.Code, ex.Message, request.Id, false);
}
}
private async Task OnSubmitAsync(StratumClient client, Timestamped <JsonRpcRequest> tsRequest)
{
var request = tsRequest.Value;
var context = client.ContextAs <EthereumWorkerContext>();
try
{
if (request.Id == null)
{
throw new StratumException(StratumError.MinusOne, "missing request id");
}
// check age of submission (aged submissions are usually caused by high server load)
var requestAge = clock.Now - tsRequest.Timestamp.UtcDateTime;
if (requestAge > maxShareAge)
{
logger.Debug(() => $"[{LogCat}] [{client.ConnectionId}] Dropping stale share submission request (not client's fault)");
return;
}
// validate worker
if (!context.IsAuthorized)
{
throw new StratumException(StratumError.UnauthorizedWorker, "Unauthorized worker");
}
else if (!context.IsSubscribed)
{
throw new StratumException(StratumError.NotSubscribed, "Not subscribed");
}
// check request
var submitRequest = request.ParamsAs <string[]>();
if (submitRequest.Length != 3 ||
submitRequest.Any(string.IsNullOrEmpty))
{
throw new StratumException(StratumError.MinusOne, "malformed PoW result");
}
// recognize activity
context.LastActivity = clock.Now;
var poolEndpoint = poolConfig.Ports[client.PoolEndpoint.Port];
var share = await manager.SubmitShareAsync(client, submitRequest, context.Difficulty,
poolEndpoint.Difficulty);
await client.RespondAsync(true, request.Id);
// publish
messageBus.SendMessage(new ClientShare(client, share));
// telemetry
PublishTelemetry(TelemetryCategory.Share, clock.Now - tsRequest.Timestamp.UtcDateTime, true);
logger.Info(() => $"[{LogCat}] [{client.ConnectionId}] Share accepted: D={Math.Round(share.Difficulty / EthereumConstants.Pow2x32, 3)}");
await EnsureInitialWorkSent(client);
// update pool stats
if (share.IsBlockCandidate)
{
poolStats.LastPoolBlockTime = clock.Now;
}
// update client stats
context.Stats.ValidShares++;
await UpdateVarDiffAsync(client);
}
catch (StratumException ex)
{
await client.RespondErrorAsync(ex.Code, ex.Message, request.Id, false);
// telemetry
PublishTelemetry(TelemetryCategory.Share, clock.Now - tsRequest.Timestamp.UtcDateTime, false);
// update client stats
context.Stats.InvalidShares++;
logger.Info(() => $"[{LogCat}] [{client.ConnectionId}] Share rejected: {ex.Code}");
// banning
ConsiderBan(client, context, poolConfig.Banning);
}
}
private async Task OnLoginAsync(StratumClient client, Timestamped <JsonRpcRequest> tsRequest)
{
var request = tsRequest.Value;
var context = client.ContextAs <MoneroWorkerContext>();
if (request.Id == null)
{
await client.RespondErrorAsync(StratumError.MinusOne, "missing request id", request.Id);
return;
}
var loginRequest = request.ParamsAs <MoneroLoginRequest>();
if (string.IsNullOrEmpty(loginRequest?.Login))
{
await client.RespondErrorAsync(StratumError.MinusOne, "missing login", request.Id);
return;
}
// extract worker/miner/paymentid
var split = loginRequest.Login.Split('.');
context.MinerName = split[0].Trim();
context.WorkerName = split.Length > 1 ? split[1].Trim() : null;
context.UserAgent = loginRequest.UserAgent?.Trim();
var passParts = loginRequest.Password?.Split(PasswordControlVarsSeparator);
// extract paymentid
var index = context.MinerName.IndexOf('#');
if (index != -1)
{
context.PaymentId = context.MinerName.Substring(index + 1).Trim();
context.MinerName = context.MinerName.Substring(0, index).Trim();
}
// validate login
var result = manager.ValidateAddress(context.MinerName);
context.IsSubscribed = result;
context.IsAuthorized = result;
if (!context.IsAuthorized)
{
await client.RespondErrorAsync(StratumError.MinusOne, "invalid login", request.Id);
return;
}
// validate payment Id
if (!string.IsNullOrEmpty(context.PaymentId) && context.PaymentId.Length != MoneroConstants.PaymentIdHexLength)
{
await client.RespondErrorAsync(StratumError.MinusOne, "invalid payment id", request.Id);
return;
}
// extract control vars from password
var staticDiff = GetStaticDiffFromPassparts(passParts);
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);
}
// respond
var loginResponse = new MoneroLoginResponse
{
Id = client.ConnectionId,
Job = CreateWorkerJob(client)
};
await client.RespondAsync(loginResponse, request.Id);
// log association
logger.Info(() => $"[{LogCat}] [{client.ConnectionId}] = {loginRequest.Login} = {client.RemoteEndpoint.Address}");
}
private async Task OnSubmitAsync(StratumClient client, Timestamped <JsonRpcRequest> tsRequest)
{
var request = tsRequest.Value;
var context = client.ContextAs <MoneroWorkerContext>();
try
{
if (request.Id == null)
{
throw new StratumException(StratumError.MinusOne, "missing request id");
}
// check age of submission (aged submissions are usually caused by high server load)
var requestAge = clock.Now - tsRequest.Timestamp.UtcDateTime;
if (requestAge > maxShareAge)
{
logger.Debug(() => $"[{LogCat}] [{client.ConnectionId}] Dropping stale share submission request (not client's fault)");
return;
}
// check request
var submitRequest = request.ParamsAs <MoneroSubmitShareRequest>();
// validate worker
if (client.ConnectionId != submitRequest?.WorkerId || !context.IsAuthorized)
{
throw new StratumException(StratumError.MinusOne, "unauthorized");
}
// recognize activity
context.LastActivity = clock.Now;
MoneroWorkerJob job;
lock (context)
{
var jobId = submitRequest?.JobId;
if (string.IsNullOrEmpty(jobId) ||
(job = context.ValidJobs.FirstOrDefault(x => x.Id == jobId)) == null)
{
throw new StratumException(StratumError.MinusOne, "invalid jobid");
}
}
// dupe check
var nonceLower = submitRequest.Nonce.ToLower();
lock (job)
{
if (job.Submissions.Contains(nonceLower))
{
throw new StratumException(StratumError.MinusOne, "duplicate share");
}
job.Submissions.Add(nonceLower);
}
var poolEndpoint = poolConfig.Ports[client.PoolEndpoint.Port];
var share = await manager.SubmitShareAsync(client, submitRequest, job, poolEndpoint.Difficulty);
await client.RespondAsync(new MoneroResponseBase(), request.Id);
// publish
messageBus.SendMessage(new ClientShare(client, share));
// telemetry
PublishTelemetry(TelemetryCategory.Share, clock.Now - tsRequest.Timestamp.UtcDateTime, true);
logger.Info(() => $"[{LogCat}] [{client.ConnectionId}] Share accepted: D={Math.Round(share.Difficulty, 3)}");
// update pool stats
if (share.IsBlockCandidate)
{
poolStats.LastPoolBlockTime = clock.Now;
}
// update client stats
context.Stats.ValidShares++;
await UpdateVarDiffAsync(client);
}
catch (StratumException ex)
{
await client.RespondErrorAsync(ex.Code, ex.Message, request.Id, false);
// telemetry
PublishTelemetry(TelemetryCategory.Share, clock.Now - tsRequest.Timestamp.UtcDateTime, false);
// update client stats
context.Stats.InvalidShares++;
logger.Info(() => $"[{LogCat}] [{client.ConnectionId}] Share rejected: {ex.Message}");
// banning
ConsiderBan(client, context, poolConfig.Banning);
}
}