Block top - The block number and size with the blockchain (in blocks) on generation of the present block Nonce - The transaction selection for the 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://techonpage.com/story5688537/the-smart-trick-of-blockchain-explorer-app-that-nobody-is-discussing-https-hedgedoc-digillab-uni-augsburg-de-mshxmk-praykwj94jou11g