Block top - The block selection and size of your blockchain (in blocks) on development of the current block Nonce - The transaction amount with the from address (bear in mind this commences at 0 so a nonce of 100 would basically be the 101st transaction submitted by this account) https://zanybookmarks.com/story20706551/not-known-details-about-blockchain-explorer-usdt-trc20-https-fletcher-odonnell-thoughtlanes-net-exploring-further-the-world-of-blockchain