Block top - The block quantity and length in the blockchain (in blocks) on generation of the present block Nonce - The transaction number for the from address (Keep in mind this begins at 0 so a nonce of 100 would basically be the 101st transaction submitted by this account) https://altbookmark.com/story22140471/the-smart-trick-of-explorer-blockchain-ethereum-that-nobody-is-discussing-https-www-giveawayoftheday-com-forums-profile-1172807