Block top - The block selection and size with the blockchain (in blocks) on generation of the current block Nonce - The transaction range to the from address (bear in mind this starts off at 0 so a nonce of one hundred would truly be the 101st transaction submitted by https://bookmarkforce.com/story20697170/5-simple-statements-about-blockchain-explorer-solana-explained-https-www-instapaper-com-p-16864836