Block top - The block number and duration with the blockchain (in blocks) on generation of the present block Nonce - The transaction selection for the from address (Remember this starts off at 0 so a nonce of a hundred would truly be the 101st transaction submitted by this account) https://bookmarkshq.com/story22606484/a-review-of-blockchain-explorer-usdt-https-fletcher-odonnell-thoughtlanes-net-exploring-further-the-world-of-blockchain