Block top - The block number and length from the blockchain (in blocks) on development of the present block Nonce - The transaction range with the from address (Remember this starts off at 0 so a nonce of 100 would actually be the 101st transaction submitted by this account) Contract https://modernbookmarks.com/story20311227/not-known-details-about-explorer-blockchain-ton-https-fletcher-odonnell-thoughtlanes-net-exploring-further-the-world-of-blockchain