Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction amount to the from address (Keep in mind this begins at 0 so a nonce of one hundred would truly be the a hundred and first transaction https://bookmarkcolumn.com/story20109365/not-known-facts-about-blockchain-explorer-unconfirmed-transaction-https-www-instapaper-com-p-16864836