Block top - The block number and length in the blockchain (in blocks) on development of the present block Nonce - The transaction number for your from address (Keep in mind this commences at 0 so a nonce of a hundred would basically be the one hundred and first transaction https://socialbuzzfeed.com/story6123333/explorer-blockchain-base-an-overview-https-writeablog-net-storeformat0-blockchain-in-the-microscope-exploring-the-unsung-resources