Block top - The block selection and length of the blockchain (in blocks) on creation of the current block Nonce - The transaction amount to the from address (Remember this starts off at 0 so a nonce of a hundred would essentially be the one hundred and first transaction submitted https://webcastlist.com/story21598086/new-step-by-step-map-for-blockchain-explorer-unconfirmed-transaction-https-500px-com-p-barrkijrooney