Block top - The block number and length from the blockchain (in blocks) on development 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://bookmarkick.com/story20253428/blockchain-explorer-usdt-trc20-fundamentals-explained-https-md-entropia-de-aifurowaq7oqbm16-zzrcw