Block top - The block amount and size with the blockchain (in blocks) on generation 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://thebookmarkfree.com/story20562839/a-review-of-blockchain-explorer-usdt-https-rentry-co-4vomqtzo