Block top - The block selection and duration from the blockchain (in blocks) on creation of the current block Nonce - The transaction range with the from address (Remember this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) Contract generation https://mysocialname.com/story5290477/not-known-factual-statements-about-blockchain-explorer-tool-https-fletcher-odonnell-thoughtlanes-net-exploring-further-the-world-of-blockchain