Block top - The block selection and duration of your blockchain (in blocks) on creation of the current block Nonce - The transaction number for your from address (bear in mind this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://bookmarkusers.com/story20500649/5-tips-about-blockchain-explorer-you-can-use-today-https-urlscan-io-result-0199164a-7dbe-7737-944c-199699cc315c