Block top - The block number and length from the blockchain (in blocks) on development of the present block Nonce - The transaction selection for the from address (bear in mind this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://myeasybookmarks.com/story6090706/what-does-blockchain-explorer-usdt-mean-https-www-demilked-com-author-brokerwhorl5