Block top - The block selection and duration from the blockchain (in blocks) on creation of the current block Nonce - The transaction variety for that 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://bookmarkize.com/story20720954/blockchain-explorer-usdt-trc20-fundamentals-explained-https-hedgedoc-digillab-uni-augsburg-de-mshxmk-praykwj94jou11g