Block top - The block selection and duration 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://bookmarkingalpha.com/story20600506/details-fiction-and-explorer-blockchain-ethereum-https-fletcher-odonnell-thoughtlanes-net-exploring-further-the-world-of-blockchain