Block top - The block number and duration with the blockchain (in blocks) on generation of the present block Nonce - The transaction number for the from address (bear in mind this starts at 0 so a nonce of 100 would really be the a hundred and first transaction submitted https://baidubookmark.com/story20152939/not-known-facts-about-blockchain-explorer-usdt-https-md-darmstadt-ccc-de-znwtrv3frkwon6rj4y8pua