Block top - The block selection and length of the blockchain (in blocks) on creation of the current block Nonce - The transaction amount to 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://webookmarks.com/story5805304/the-smart-trick-of-blockchain-explorer-app-that-nobody-is-discussing-https-www-bitsdujour-com-profiles-iptrcw