Block top - The block quantity and size from the blockchain (in blocks) on generation of the current block Nonce - The transaction variety with the from address (bear in mind this starts at 0 so a nonce of a hundred would really be the a hundred and first transaction https://bookmarkcork.com/story21512483/details-fiction-and-explorer-blockchain-ethereum-https-www-instapaper-com-p-16864836