Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction amount to the from address (Keep in mind this commences at 0 so a nonce of a hundred would essentially be the one hundred and first transaction https://setbookmarks.com/story20614037/blockchain-explorer-usdt-trc20-fundamentals-explained-https-www-instapaper-com-p-16864836