protected virtual async Task OnSubscribeAsync(StratumClient client, Timestamped <JsonRpcRequest> tsRequest)
{
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 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 OnAuthorizeAsync(StratumClient client, Timestamped <JsonRpcRequest> tsRequest)
{
await base.OnAuthorizeAsync(client, tsRequest);
var context = client.ContextAs <BitcoinWorkerContext>();
if (context.IsAuthorized)
{
// send intial update
await client.NotifyAsync(ZCashStratumMethods.SetTarget, new object[] { EncodeTarget(context.Difficulty) });
await client.NotifyAsync(BitcoinStratumMethods.MiningNotify, currentJobParams);
}
}
protected override async Task OnVarDiffUpdateAsync(StratumClient client, double newDiff)
{
var context = client.ContextAs<BitcoinWorkerContext>();
context.EnqueueNewDifficulty(newDiff);
// apply immediately and notify client
if (context.HasPendingDifficulty)
{
context.ApplyPendingDifficulty();
await client.NotifyAsync(BitcoinStratumMethods.SetDifficulty, new object[] { context.Difficulty });
await client.NotifyAsync(BitcoinStratumMethods.MiningNotify, currentJobParams);
}
}
private async Task OnSuggestDifficultyAsync(StratumClient client, Timestamped <JsonRpcRequest> tsRequest)
{
var request = tsRequest.Value;
var context = client.ContextAs <BitcoinWorkerContext>();
// acknowledge
await client.RespondAsync(true, request.Id);
try
{
var requestedDiff = (double)Convert.ChangeType(request.Params, TypeCode.Double);
// client may suggest higher-than-base difficulty, but not a lower one
var poolEndpoint = poolConfig.Ports[client.PoolEndpoint.Port];
if (requestedDiff > poolEndpoint.Difficulty)
{
context.SetDifficulty(requestedDiff);
await client.NotifyAsync(BitcoinStratumMethods.SetDifficulty, new object[] { context.Difficulty });
logger.Info(() => $"[{client.ConnectionId}] Difficulty set to {requestedDiff} as requested by miner");
}
}
catch (Exception ex)
{
logger.Error(ex, () => $"Unable to convert suggested difficulty {request.Params}");
}
}
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 OnVarDiffUpdateAsync(StratumClient client, double newDiff)
{
await base.OnVarDiffUpdateAsync(client, newDiff);
// apply immediately and notify client
var context = client.ContextAs <EthereumWorkerContext>();
if (context.HasPendingDifficulty)
{
context.ApplyPendingDifficulty();
// send job
await client.NotifyAsync(EthereumStratumMethods.SetDifficulty, new object[] { context.Difficulty });
await client.NotifyAsync(EthereumStratumMethods.MiningNotify, currentJobParams);
}
}
private async Task EnsureInitialWorkSent(StratumClient client)
{
var context = client.ContextAs <EthereumWorkerContext>();
var sendInitialWork = false;
lock (context)
{
if (context.IsSubscribed && context.IsAuthorized && !context.IsInitialWorkSent && context.IsNiceHashClient)
{
context.IsInitialWorkSent = true;
sendInitialWork = true;
}
}
if (sendInitialWork)
{
// send intial update
await client.NotifyAsync(EthereumStratumMethods.SetDifficulty, new object[] { context.Difficulty });
await client.NotifyAsync(EthereumStratumMethods.MiningNotify, currentJobParams);
}
}
protected override async Task OnVarDiffUpdateAsync(StratumClient client, double newDiff)
{
await base.OnVarDiffUpdateAsync(client, newDiff);
// apply immediately and notify client
var context = client.ContextAs <CryptonoteWorkerContext>();
if (context.HasPendingDifficulty)
{
context.ApplyPendingDifficulty();
// re-send job
var job = CreateWorkerJob(client);
await client.NotifyAsync(CryptonoteStratumMethods.JobNotify, job);
}
}
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);
}
}
