/**
* Encodes data in an arbitrary power-of-2 base.
* @param Bytes number of bytes per chunk of characters.
* @param Chars number of characters per chunk.
*/
template<unsigned Bytes, unsigned Chars> std::string
chunkEncode(DataSlice data, const char *alphabet)
{
std::string out;
auto chunks = (data.size() + Bytes - 1) / Bytes; // Rounding up
out.reserve(Chars * chunks);
constexpr unsigned shift = 8 * Bytes / Chars; // Bits per character
uint16_t buffer = 0; // Bits waiting to be written out, MSB first
int bits = 0; // Number of bits currently in the buffer
auto i = data.begin();
while (i != data.end() || 0 < bits)
{
// Reload the buffer if we need more bits:
if (i != data.end() && bits < shift)
{
buffer |= *i++ << (8 - bits);
bits += 8;
}
// Write out the most-significant bits in the buffer:
out += alphabet[buffer >> (16 - shift)];
buffer <<= shift;
bits -= shift;
}
// Pad the final string to a multiple of the chunk size:
out.append(-out.size() % Chars, '=');
return out;
}
Status
Login::passwordAuthSet(DataSlice passwordAuth)
{
std::lock_guard<std::mutex> lock(mutex_);
passwordAuth_ = DataChunk(passwordAuth.begin(), passwordAuth.end());
return Status();
}
Status
broadcastTx(Wallet &self, DataSlice rawTx)
{
// Create communication resources:
auto syncer = std::make_shared<Syncer>();
auto s1 = std::make_shared<DelayedStatus>();
auto s2 = std::make_shared<DelayedStatus>();
auto s3 = std::make_shared<DelayedStatus>();
// Launch the broadcasts:
DataChunk tx(rawTx.begin(), rawTx.end());
if (!self.bOverrideBitcoinServers)
{
std::thread(broadcastTask<blockchainPostTx>, syncer, s1, tx).detach();
std::thread(broadcastTask<insightPostTx>, syncer, s2, tx).detach();
}
// Queue up an async broadcast over the TxUpdater:
auto updaterDone = [syncer, s3](Status s)
{
{
std::lock_guard<std::mutex> lock(syncer->mutex);
s3->status = s;
s3->done = true;
if (s)
ABC_DebugLog("Stratum broadcast OK");
else
s.log();
}
syncer->cv.notify_all();
};
watcherSend(self, updaterDone, rawTx).log();
// Loop as long as any thread is still running:
while (true)
{
// Wait for the condition variable, which also acquires the lock:
std::unique_lock<std::mutex> lock(syncer->mutex);
syncer->cv.wait(lock);
// Stop waiting if any broadcast has succeeded:
if (s1->done && s1->status)
break;
if (s2->done && s2->status)
break;
if (s3->done && s3->status)
break;
// If they are all done, we have an error:
if (s1->done && s2->done && s3->done)
return s1->status;
}
return Status();
}
Login::Login(LoginStore &store, DataSlice dataKey):
store(store),
parent_(store.shared_from_this()),
dataKey_(dataKey.begin(), dataKey.end())
{}