Block top - The block selection and length of the blockchain (in blocks) on creation of the current block Nonce - The transaction amount to the from address (Keep in mind this commences at 0 so a nonce of 100 would truly be the a hundred and first transaction submitted https://socialaffluent.com/story6085986/detailed-notes-on-blockchain-explorer-unconfirmed-transaction-https-rentry-co-4vomqtzo