Block top - The block number and length from the blockchain (in blocks) on creation of the current block Nonce - The transaction number for the from address (bear in mind this starts at 0 so a nonce of 100 would actually be the 101st transaction submitted by this account) https://bookmarkstime.com/story20981461/the-smart-trick-of-blockchain-explorer-app-that-nobody-is-discussing-https-www-webwiki-ch-cryptoexplorerhub-com