Block top - The block number and length in the blockchain (in blocks) on generation of the present block Nonce - The transaction number for your from address (bear in mind this begins at 0 so a nonce of one hundred would in fact be the a hundred and first https://socialbuzzfeed.com/story6039387/the-smart-trick-of-blockchain-explorer-app-that-nobody-is-discussing-https-writeablog-net-storeformat0-blockchain-in-the-microscope-exploring-the-unsung-resources