Block top - The block number and length of 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://ok-social.com/story5837067/the-definitive-guide-to-explorer-blockchain-ethereum-https-setiathome-berkeley-edu-show-user-php-userid-13199150