Block top - The block number and length in the blockchain (in blocks) on development of the present block Nonce - The transaction selection with the from address (bear in mind this starts at 0 so a nonce of 100 would basically be the one hundred and first transaction submitted https://peakbookmarks.com/story20788081/5-simple-statements-about-blockchain-explorer-solana-explained-https-rentry-co-4vomqtzo