Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction amount to 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://maroonbookmarks.com/story20209218/the-definitive-guide-to-explorer-blockchain-ethereum-https-www-hulkshare-com-circledrop4