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://socialwebconsult.com/story5916397/explorer-blockchain-base-an-overview-https-posteezy-com-past-these-blocks-discovering-realm-copyright-explorers