public async Task <IActionResult> PostOutputAsync([FromQuery] string roundHash, [FromBody] OutputRequest outputRequest)
{
if (string.IsNullOrWhiteSpace(roundHash) ||
outputRequest == null ||
string.IsNullOrWhiteSpace(outputRequest.OutputScript) ||
string.IsNullOrWhiteSpace(outputRequest.SignatureHex) ||
!ModelState.IsValid)
{
return(BadRequest());
}
CcjRound round = Coordinator.TryGetRound(roundHash);
if (round == null)
{
return(NotFound("Round not found."));
}
if (round.Status != CcjRoundStatus.Running)
{
return(Forbid("Round is not running."));
}
CcjRoundPhase phase = round.Phase;
if (phase != CcjRoundPhase.OutputRegistration)
{
return(Forbid($"Output registration can only be done from OutputRegistration phase. Current phase: {phase}."));
}
var outputScript = new Script(outputRequest.OutputScript);
if (RsaKey.PubKey.Verify(ByteHelpers.FromHex(outputRequest.SignatureHex), outputScript.ToBytes()))
{
using (await OutputLock.LockAsync())
{
Bob bob = null;
try
{
bob = new Bob(outputScript);
round.AddBob(bob);
}
catch (Exception ex)
{
return(BadRequest($"Invalid outputScript is provided. Details: {ex.Message}"));
}
if (round.CountBobs() == round.AnonymitySet)
{
await round.ExecuteNextPhaseAsync(CcjRoundPhase.Signing);
}
}
return(NoContent());
}
else
{
return(BadRequest("Invalid signature provided."));
}
}
public async Task <IActionResult> PostOutputAsync([FromQuery, Required] long roundId, [FromBody, Required] OutputRequest request)
{
if (roundId < 0 ||
request.Level < 0 ||
!ModelState.IsValid)
{
return(BadRequest());
}
CcjRound round = Coordinator.TryGetRound(roundId);
if (round is null)
{
TryLogLateRequest(roundId, CcjRoundPhase.OutputRegistration);
return(NotFound("Round not found."));
}
if (round.Status != CcjRoundStatus.Running)
{
TryLogLateRequest(roundId, CcjRoundPhase.OutputRegistration);
return(Gone("Round is not running."));
}
CcjRoundPhase phase = round.Phase;
if (phase != CcjRoundPhase.OutputRegistration)
{
TryLogLateRequest(roundId, CcjRoundPhase.OutputRegistration);
return(Conflict($"Output registration can only be done from OutputRegistration phase. Current phase: {phase}."));
}
if (request.OutputAddress.Network != Network)
{
// RegTest and TestNet address formats are sometimes the same.
if (Network == Network.Main)
{
return(BadRequest($"Invalid OutputAddress Network."));
}
}
if (request.OutputAddress == Constants.GetCoordinatorAddress(Network))
{
Logger.LogWarning <ChaumianCoinJoinController>($"Bob is registering the coordinator's address. Address: {request.OutputAddress}, Level: {request.Level}, Signature: {request.UnblindedSignature}.");
}
if (request.Level > round.MixingLevels.GetMaxLevel())
{
return(BadRequest($"Invalid mixing Level is provided. Provided: {request.Level}. Maximum: {round.MixingLevels.GetMaxLevel()}."));
}
if (round.ContainsRegisteredUnblindedSignature(request.UnblindedSignature))
{
return(NoContent());
}
MixingLevel mixinglevel = round.MixingLevels.GetLevel(request.Level);
Signer signer = mixinglevel.Signer;
if (signer.VerifyUnblindedSignature(request.UnblindedSignature, request.OutputAddress.ScriptPubKey.ToBytes()))
{
using (await OutputLock.LockAsync())
{
Bob bob = null;
try
{
bob = new Bob(request.OutputAddress, mixinglevel);
round.AddBob(bob);
round.AddRegisteredUnblindedSignature(request.UnblindedSignature);
}
catch (Exception ex)
{
return(BadRequest($"Invalid outputAddress is provided. Details: {ex.Message}"));
}
int bobCount = round.CountBobs();
int blindSigCount = round.CountBlindSignatures();
if (bobCount == blindSigCount) // If there'll be more bobs, then round failed. Someone may broke the crypto.
{
await round.ExecuteNextPhaseAsync(CcjRoundPhase.Signing);
}
}
return(NoContent());
}
return(BadRequest("Invalid signature provided."));
}