Block top - The block range and duration of your blockchain (in blocks) on creation of the current block Nonce - The transaction quantity for your from address (bear in mind this starts at 0 so a nonce of 100 would truly be the 101st transaction submitted by this account) https://bookmarkinglog.com/story20273518/not-known-details-about-explorer-blockchain-ton-https-rentry-co-4vomqtzo