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 begins at 0 so a nonce of one hundred would truly be the a hundred and first transaction https://bookmarkinglog.com/story20620459/details-fiction-and-explorer-blockchain-ethereum-https-writeablog-net-storeformat0-blockchain-in-the-microscope-exploring-the-unsung-resources