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 actually be the 101st transaction submitted by this account) https://geniusbookmarks.com/story20820842/helping-the-others-realize-the-advantages-of-blockchain-explorer-one-https-www-instapaper-com-p-16864836