Block top - The block number and length in the blockchain (in blocks) on development of the present block Nonce - The transaction selection with the from address (bear in mind this starts at 0 so a nonce of 100 would in fact be the a hundred and first transaction https://bookmarkpath.com/story20630045/what-does-blockchain-explorer-usdt-mean-https-heavenarticle-com-author-pathpastor4-452336