Block top - The block number and length in the blockchain (in blocks) on generation of the present block Nonce - The transaction number for your from address (Keep in mind this commences at 0 so a nonce of a hundred would actually be the 101st transaction submitted by this https://hyperbookmarks.com/story20531829/5-simple-statements-about-blockchain-explorer-solana-explained-https-www-udrpsearch-com-user-lampwhorl2