Block top - The block number and length in the blockchain (in blocks) on development of the present block Nonce - The transaction selection for the from address (bear in mind this begins at 0 so a nonce of 100 would truly be the a hundred and first transaction submitted https://bookmarkedblog.com/story21487338/everything-about-blockchain-explorer-https-fletcher-odonnell-thoughtlanes-net-exploring-further-the-world-of-blockchain