Block top - The block number and duration on the blockchain (in blocks) on generation of the present block Nonce - The transaction number 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://thesocialintro.com/story6139614/not-known-facts-about-blockchain-explorer-unconfirmed-transaction-https-www-hulkshare-com-circledrop4