Block top - The block selection and duration of your blockchain (in blocks) on creation of the current block Nonce - The transaction quantity for your from address (bear in mind this starts at 0 so a nonce of 100 would truly be the 101st transaction submitted by this account) https://infopagex.com/story5610195/details-fiction-and-explorer-blockchain-ethereum-https-wikimapia-org-external-link-url-https-cryptoexplorerhub-com