Block top - The block selection and duration of your blockchain (in blocks) on generation of the present block Nonce - The transaction selection with the from address (Remember this starts off at 0 so a nonce of a hundred would actually be the 101st transaction submitted by this account) https://ezmarkbookmarks.com/story20783637/the-fact-about-explorer-blockchain-base-that-no-one-is-suggesting-https-fletcher-odonnell-thoughtlanes-net-exploring-further-the-world-of-blockchain