Block top - The block selection and length from the blockchain (in blocks) on creation of the current block Nonce - The transaction variety for that from address (Remember this starts off at 0 so a nonce of a hundred would really be the 101st transaction submitted by this account) https://bookmarkstumble.com/story22134245/what-does-blockchain-explorer-usdt-mean-https-cuwip-ucsd-edu-members-georgeuncle0-activity-1839979