Block top - The block selection and duration with the blockchain (in blocks) on generation of the current block Nonce - The transaction selection for the from address (Keep in mind this starts off at 0 so a nonce of a hundred would actually be the 101st transaction submitted by https://pr1bookmarks.com/story21107235/5-simple-statements-about-blockchain-explorer-solana-explained-https-www-starsandstripesfc-com-users-churchkjeldse