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://singnalsocial.com/story5392319/not-known-factual-statements-about-blockchain-explorer-tool-https-blogfreely-net-pathfrog8-blockchain-trackers-a-gateway-to-comprehending-copyright-transactions