Block top - The block number and length in the blockchain (in blocks) on development of the present block Nonce - The transaction selection with 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://e-bookmarks.com/story6209422/the-smart-trick-of-blockchain-explorer-app-that-nobody-is-discussing-https-files-fm-f-e6nkandt95