Block top - The block selection and duration on the blockchain (in blocks) on creation of the current block Nonce - The transaction range with the from address (bear in mind this commences at 0 so a nonce of a hundred would really be the a hundred and first transaction https://vuf.minagricultura.gov.co/Lists/Informacin%20Servicios%20Web/DispForm.aspx?ID=11784754