Block top - The block selection and length from the blockchain (in blocks) on creation of the current block Nonce - The transaction range with the from address (Remember this starts off at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) Agreement https://mixbookmark.com/story5852291/detailed-notes-on-blockchain-explorer-unconfirmed-transaction-https-500px-com-p-barrkijrooney