Block top - The block selection and length from 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 essentially be the one hundred and first transaction https://businessbookmark.com/story5737885/not-known-factual-statements-about-blockchain-explorer-tool-https-notes-io-ww2s8