Block top - The block number and size with the blockchain (in blocks) on generation of the present block Nonce - The transaction selection for the 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://fellowfavorite.com/story21499005/5-simple-statements-about-blockchain-explorer-solana-explained-https-www-rosewood-edu-na-profile-engelhczrussell69263-profile