Block top - The block number and length on the blockchain (in blocks) on generation of the present block Nonce - The transaction quantity to the from address (Keep in mind this starts at 0 so a nonce of 100 would in fact be the a hundred and first transaction https://bookmarkmargin.com/story20588168/5-simple-statements-about-blockchain-explorer-solana-explained-https-rentry-co-4vomqtzo