Block top - The block number and length 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 100 would really be the 101st transaction submitted by this account) https://maximusbookmarks.com/story20918500/blockchain-explorer-usdt-trc20-fundamentals-explained-https-files-fm-f-e6nkandt95