Block top - The block quantity and duration with the blockchain (in blocks) on generation of the present block Nonce - The transaction selection for the from address (bear in mind this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://crossbookmark.com/story20383367/detailed-notes-on-blockchain-explorer-unconfirmed-transaction-https-pad-karuka-tech-vc6p2vmyr6a9ij1xxkanwg