Block top - The block number and duration of your blockchain (in blocks) on creation of the current block Nonce - The transaction amount to the from address (Remember this starts off at 0 so a nonce of a hundred would actually be the 101st transaction submitted by this account) https://thebookmarkplaza.com/story20511117/what-does-blockchain-explorer-usdt-mean-https-www-multichain-com-qa-user-knotdrop3