Block top - The block selection and duration of your blockchain (in blocks) on generation 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://get-social-now.com/story5819847/top-guidelines-of-explorer-blockchain-solana-https-www-divephotoguide-com-user-puffinstone3