Is there any tool to extract the bitcoin transaction network from the blockchain?

-2

BlockChain::BlockChain ( QObject* parent ) : QFile ( parent ), blkFile ( START_BLOCK )
{
  connect ( this, SIGNAL ( block ( const QByteArray& ) ), parent, SLOT ( block ( const QByteArray& ) ) );
  connect ( this, SIGNAL ( doneFile ( ) ), parent, SLOT ( doneFile ( ) ) );
  QTimer::singleShot ( 0, this, SLOT ( start ( ) ) );
}

void BlockChain::start ( )
{
  setFileName ( blkFileName ( blkFile++ ) );
  if ( !open ( QIODevice::ReadOnly ) )
  {
    _trace ( QString ( "cant open [%1]" ).arg ( fileName ( ) ) );
    emit block ( QByteArray ( ) );
    deleteLater ( );
  }
  else
  {
    _trace ( QString ( "processing [%1]" ).arg ( fileName ( ) ) );
    QTimer::singleShot ( 0, this, SLOT ( next ( ) ) );
  }
}

void BlockChain::next ( )
{
  if ( pos ( ) < size ( ) )
  {
    quint32 magic;
    quint32 sz ( read ( (char*)&magic, 4 ) );
    while ( !magic && pos ( ) < size ( ) - 4 )
      read ( (char*)&magic, 4 );
    xassert ( ( ( magic == MAGIC_ID ) || !magic ) && ( sz == 4 ) );
    if ( magic )
    {
      read ( (char*)&sz, 4 );
      emit block ( read ( sz ) );
      QTimer::singleShot ( 0, this, SLOT ( next ( ) ) );
      return;
    }
  }
  close ( );
  emit doneFile ( );
  QTimer::singleShot ( 0, this, SLOT ( start ( ) ) );
}

const QString BlockChain::blkFileName ( const int i ) const
{
  return
    ( i < 10 ) ? QString ( DATA_ROOT "\\blk0000%1.dat" ).arg ( i ) :
    ( i < 100 ) ? QString ( DATA_ROOT "\\blk000%1.dat" ).arg ( i ) :
    QString ( DATA_ROOT "\\blk00%1.dat" ).arg ( i );
}

amaclin

Posted 2017-03-17T17:11:01.083

Reputation: 5 763

This seems to be missing a class definition at least. – Pieter Wuille – 2017-03-18T17:01:06.157

this piece of code is only a demonstration that blockchain parsing is very simple task – amaclin – 2017-03-18T17:59:42.053

1Ok, but it's not an answer. You don't explain what it does, why it works, what it needs. – Pieter Wuille – 2017-03-18T18:20:16.933

this is an answer for a question "Is there any tool to extract the bitcoin transaction [network] from the blockchain?". the short answer is: "yes, there is. here is a proof that such tool exists" – amaclin – 2017-03-18T23:34:09.590

1I'm downvoting this because it gives no context. Just a piece of code that doesn't even compile is not informative. – Pieter Wuille – 2017-03-19T00:15:26.207

Is there any tool to extract the bitcoin transaction network from the blockchain?

Answers