Block top - The block amount and size from the blockchain (in blocks) on creation of the present block Nonce - The transaction number for your 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://socialwebconsult.com/story5903614/the-smart-trick-of-blockchain-explorer-app-that-nobody-is-discussing-https-blogfreely-net-pathfrog8-blockchain-trackers-a-gateway-to-comprehending-copyright-transactions