Block top - The block number and size with the blockchain (in blocks) on generation of the present block Nonce - The transaction selection for the from address (bear in mind this starts at 0 so a nonce of 100 would actually be the 101st transaction submitted by this account) https://trackbookmark.com/story22064170/explorer-blockchain-things-to-know-before-you-buy-https-www-hulkshare-com-circledrop4