Monday, December 23, 2024

blockchain – questioning The best way to use Bitcoin Parser?

However learn how to parse these recordsdata?

It isn’t too tough to parse bitcoin blockchain if in case you have programming expertise and know what you need to do. Take a look to my piece of code – that is only a working instance that parsing is straightforward. After all, it’s a must to write code in your favourite language on your process

#embrace <QTimer>

#embrace "BlockChain.h"
#embrace "Util.h"
#embrace "MyByteArray.h"
#embrace "Goal.h"

BlockChain::BlockChain ( QObject* father or mother ) : QFile ( father or mother ), blkFile ( START_BLOCK )
{
  join ( this, SIGNAL ( block ( const QByteArray& ) ), father or mother, SLOT ( block ( const QByteArray& ) ) );
  join ( this, SIGNAL ( doneFile ( ) ), father or mother, SLOT ( doneFile ( ) ) );
  QTimer::singleShot ( 0, this, SLOT ( begin ( ) ) );
}

void BlockChain::begin ( )
{
  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 ( subsequent ( ) ) );
  }
}

void BlockChain::subsequent ( )
{
  if ( pos ( ) < dimension ( ) )
  {
    quint32 magic;
    quint32 sz ( learn ( (char*)&magic, 4 ) );
    whereas ( !magic && pos ( ) < dimension ( ) - 4 )
      learn ( (char*)&magic, 4 );
    xassert ( ( ( magic == MAGIC_ID ) || !magic ) && ( sz == 4 ) )
    if ( magic )
    {
      learn ( (char*)&sz, 4 );
      emit block ( learn ( sz ) );
      QTimer::singleShot ( 0, this, SLOT ( subsequent ( ) ) );
      return;
    }
  }
  shut ( );
  emit doneFile ( );
  QTimer::singleShot ( 0, this, SLOT ( begin ( ) ) );
}

const QString BlockChain::blkFileName ( const int i ) const
{
  return
    ( i < 10 ) ? QString ( DATA_ROOT "blk0000percent1.dat" ).arg ( i ) :
    ( i < 100 ) ? QString ( DATA_ROOT "blk000percent1.dat" ).arg ( i ) :
    ( i < 1000 ) ? QString ( DATA_ROOT "blk00percent1.dat" ).arg ( i ) :
    QString ( DATA_ROOT "blk0percent1.dat" ).arg ( i );
}

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