Block top - The block number and length from the blockchain (in blocks) on development of the current block Nonce - The transaction variety for that from address (Remember this starts off at 0 so a nonce of a hundred would actually be the 101st transaction submitted by this account) https://bookmarksknot.com/story22386492/detailed-notes-on-blockchain-explorer-unconfirmed-transaction-https-www-webwiki-it-cryptoexplorerhub-com