Block top - The block number and size in 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 actually be the 101st transaction submitted by this account) https://sirketlist.com/story22440589/the-blockchain-explorer-address-diaries-https-fletcher-odonnell-thoughtlanes-net-exploring-further-the-world-of-blockchain