Block top - The block selection and duration of the blockchain (in blocks) on creation of the present block Nonce - The transaction selection for the from address (bear in mind this starts at 0 so a nonce of 100 would actually be the 101st transaction submitted by this account) https://pukkabookmarks.com/story20509449/the-greatest-guide-to-blockchain-explorer-unconfirmed-transaction-https-postheaven-net-stickscreen2-from-bytes-to-insights-a-journey-with-copyright-adventurers