Block top - The block variety and duration with the blockchain (in blocks) on generation of the present block Nonce - The transaction number for your 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://bookmarkinglife.com/story5856300/what-does-eth-blockchain-explorer-mean-https-www-haphong-edu-vn-profile-crafttlcmcgarry6132-profile