private void Button1_Click(object sender, EventArgs e)
{
Block block = new Block(blockchain.GetLastBlock(), blockchain.retTPool(), pubKeyTBox.Text, comboBox1.SelectedIndex, addressFind.Text);
blockchain.purgeTPool(block.transactionList);
blockchain.add2Block(block);
Console.WriteLine("added new block to chain - with " + block.transactionList.Count + " transactions");
}