Block top - The block number and length 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 really be the 101st transaction submitted by this account) https://socialmediatotal.com/story5403744/blockchain-explorer-usdt-trc20-fundamentals-explained-https-independent-academia-edu-drewandreassen4