Block top - The block selection and duration of your blockchain (in blocks) on generation of the present block Nonce - The transaction range with the from address (Remember this starts off at 0 so a nonce of a hundred would actually be the 101st transaction submitted by this account) https://1001bookmarks.com/story20083298/the-2-minute-rule-for-blockchain-explorer-solana-https-blogfreely-net-pathfrog8-blockchain-trackers-a-gateway-to-comprehending-copyright-transactions