Block top - The block number and length from the blockchain (in blocks) on development of the present block Nonce - The transaction range with the from address (Remember this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) Contract generation https://bookmarkbirth.com/story20659922/not-known-details-about-blockchain-explorer-usdt-trc20-https-numberfields-asu-edu-numberfields-show-user-php-userid-6240092