Block top - The block variety and size with the blockchain (in blocks) on generation of the present block Nonce - The transaction selection for the from address (bear in mind this starts at 0 so a nonce of 100 would actually be the 101st transaction submitted by this account) https://toplistar.com/story22347558/the-best-side-of-explorer-blockchain-usdt-https-rentry-co-4vomqtzo