Block top - The block selection and duration of your blockchain (in blocks) on creation of the present block Nonce - The transaction range 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://greatbookmarking.com/story20842869/blockchain-explorer-usdt-trc20-fundamentals-explained-https-www-bitsdujour-com-profiles-iptrcw