Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction quantity for the from address (bear in mind this starts at 0 so a nonce of 100 would actually be the 101st transaction submitted by this account) https://bookmarknap.com/story11314551/what-does-blockchain-explorer-usdt-mean-https-www-udrpsearch-com-user-lampwhorl2