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 101st transaction submitted by this account) https://sociallawy.com/story10839887/a-review-of-blockchain-explorer-usdt-https-heavenarticle-com-author-pathpastor4-452336