Block top - The block range and size in the blockchain (in blocks) on creation of the current block Nonce - The transaction number with the from address (Keep in mind this begins at 0 so a nonce of 100 would actually be the one hundred and first transaction submitted https://bookmark-media.com/story20467716/explorer-blockchain-tron-an-overview-https-gaiaathome-eu-gaiaathome-show-user-php-userid-1577569