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 (bear in mind this starts at 0 so a nonce of 100 would truly be the a hundred and first transaction submitted https://adsbookmark.com/story20657924/blockchain-explorer-usdt-trc20-fundamentals-explained-https-www-demilked-com-author-brokerwhorl5