Block top - The block selection and length from the blockchain (in blocks) on development of the present block Nonce - The transaction selection for the from address (bear in mind this begins at 0 so a nonce of one hundred would essentially be the one hundred and first transaction https://thebookpage.com/story5966789/blockchain-explorer-fundamentals-explained-https-writeablog-net-storeformat0-blockchain-in-the-microscope-exploring-the-unsung-resources