Block top - The block number and length with the blockchain (in blocks) on generation of the present block Nonce - The transaction number for your from address (Keep in mind this begins at 0 so a nonce of 100 would actually be the 101st transaction submitted by this account) https://bookmarklinkz.com/story20501224/the-fact-about-explorer-blockchain-base-that-no-one-is-suggesting-https-vuf-minagricultura-gov-co-lists-informacin-20servicios-20web-dispform-aspx-id-11784754