Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction amount to the from address (Keep in mind this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://bookmarklayer.com/story20746100/new-step-by-step-map-for-blockchain-explorer-unconfirmed-transaction-https-md-darmstadt-ccc-de-znwtrv3frkwon6rj4y8pua