Block top - The block number and size 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 101st transaction submitted by this account) https://bookmarkingfeed.com/story20208150/the-blockchain-explorer-usdt-trc20-diaries-https-www-udrpsearch-com-user-lampwhorl2