Block top - The block variety and size with 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://socials360.com/story11165453/not-known-facts-about-blockchain-explorer-unconfirmed-transaction-https-www-dermandar-com-user-quietquiet9