Block top - The block quantity and size on 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://bookmarkforce.com/story20582377/blockchain-explorer-fundamentals-explained-https-hedgedoc-digillab-uni-augsburg-de-mshxmk-praykwj94jou11g