Block top - The block range and size in the blockchain (in blocks) on creation of the present block Nonce - The transaction variety for your from address (Remember this begins at 0 so a nonce of a hundred would in fact be the 101st transaction submitted by this account) https://socialislife.com/story6122571/not-known-facts-about-blockchain-explorer-unconfirmed-transaction-https-heavenarticle-com-author-pathpastor4-452336