Block top - The block quantity and length from the blockchain (in blocks) on generation of the present block Nonce - The transaction number for the from address (bear in mind this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://socialmediatotal.com/story5402721/detailed-notes-on-blockchain-explorer-unconfirmed-transaction-https-postheaven-net-stickscreen2-from-bytes-to-insights-a-journey-with-copyright-adventurers