Block top - The block number and length in the blockchain (in blocks) on development of the present block Nonce - The transaction selection for the from address (bear in mind this commences at 0 so a nonce of a hundred would basically be the 101st transaction submitted by this https://apollobookmarks.com/story20161097/detailed-notes-on-blockchain-explorer-unconfirmed-transaction-https-articlescad-com-the-remarkable-adventurers-in-the-cyber-frontier-grasping-distributed-ledger-instruments-325096-html