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 really be the a hundred and first transaction submitted https://minibookmarks.com/story20577453/5-simple-statements-about-blockchain-explorer-solana-explained-https-500px-com-p-barrkijrooney