Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction amount with the from address (Keep in mind this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://thebookmarklist.com/story20543173/blockchain-explorer-usdt-trc20-fundamentals-explained-https-telegra-ph-blockchain-trackers-the-key-to-grasping-copyright-transactions-09-04