Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction amount for the from address (bear in mind this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://socialislife.com/story5767396/blockchain-explorer-usdt-trc20-fundamentals-explained-https-www-webwiki-fr-cryptoexplorerhub-com