unsigned ChooseWinner(const std::vector<bigint_t> &choices, TRng &rng)
{
std::vector<std::pair<double,unsigned> > values;
for(unsigned i=0;i<choices.size();i++){
values.push_back(std::make_pair(1.0 / wide_as_double(8, choices[i].limbs), i));
}
std::sort(values.begin(), values.end());
double acc=0;
for(unsigned i=0;i<values.size();i++){
acc+=sqrt(values[i].first);
values[i].first=acc;
}
std::uniform_real_distribution<double> distribution(0.0,acc);
double sel=distribution(rng);
for(unsigned i=0;i<values.size();i++){
if(sel<=values[i].first)
return values[i].second;
}
return values.back().second;
}
void Run()
{
try{
auto beginConnect = std::make_shared<Packet_ClientBeginConnect>(m_clientId, m_minerId);
Log(Log_Info, "Connecting with clientId=%s, minerId=%s", m_clientId.begin(), m_minerId.begin());
SendPacket(beginConnect);
auto endConnect = RecvPacket<Packet_ServerCompleteConnect>();
Log(Log_Info, "Connected to exchange=%s, running=%s", endConnect->exchangeId.c_str(), endConnect->serverId.c_str());
while (1){
Log(Log_Verbose, "Waiting for round to begin.");
auto beginRound = RecvPacket<Packet_ServerBeginRound>();
Log(Log_Info, "Round beginning with %u bytes of chain data.", beginRound->chainData.size());
Log(Log_Verbose, "Waiting for request for bid.");
auto requestBid = RecvPacket<Packet_ServerRequestBid>();
// Get an estimate of the skew between our clock and theirs. If it is positive,
// then we are ahead of them.
double tNow = now()*1e-9;
double skewEstimate = tNow - requestBid->timeStampRequestBids*1e-9;
// And work out how long they expect it to last, independent of the skew
double period = requestBid->timeStampReceiveBids*1e-9 - requestBid->timeStampRequestBids*1e-9;
Log(Log_Info, "Received bid request: serverStart=%lf, ourStart=%lf, skew=%lg. Bid period=%lf", requestBid->timeStampRequestBids*1e-9, tNow, skewEstimate, period);
std::shared_ptr<Packet_ClientSendBid> bid = std::make_shared<Packet_ClientSendBid>();
// Making the bid
MakeBid(beginRound, requestBid, period, skewEstimate, bid->solution, bid->proof);
bid->timeSent = now();
Log(Log_Verbose, "Bid ready.");
SendPacket(bid);
Log(Log_Verbose, "Bid sent.");
Log(Log_Verbose, "Waiting for results.");
auto results = RecvPacket<Packet_ServerCompleteRound>();
Log(Log_Info, "Got round results.");
for (unsigned i = 0; i < results->submissions.size(); i++){
double taken = requestBid->timeStampReceiveBids*1e-9 - results->submissions[i].timeRecv*1e-9;
bool overDue = requestBid->timeStampReceiveBids < results->submissions[i].timeRecv;
Log(Log_Info, " %16s : %.6lg, %lg%s", results->submissions[i].clientId.c_str(),
wide_as_double(BIGINT_WORDS, results->submissions[i].proof), taken,
overDue ? " OVERDUE" : ""
);
if (m_knownCoins.find(results->submissions[i].clientId) == m_knownCoins.end()){
m_knownCoins[results->submissions[i].clientId] = 0;
}
}
if (results->winner.clientId == m_clientId){
Log(Log_Info, "");
Log(Log_Info, "You won a coin!");
Log(Log_Info, "");
}
m_knownRounds++;
m_knownCoins[results->winner.clientId]++;
Log(Log_Info, " %16s : %6s, %8s\n", "ClientId", "Coins", "Success");
auto it = m_knownCoins.begin();
while (it != m_knownCoins.end()){
Log(Log_Info, " %16s : %6d, %.6lf", it->first.c_str(), it->second, it->second / (double)m_knownRounds);
++it;
}
Log(Log_Verbose, "");
}
}
catch (std::exception &e){
Log(Log_Fatal, "Exception : %s.", e.what());
throw;
}
}
