Block top - The block number and length of the blockchain (in blocks) on creation of the current block Nonce - The transaction number 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://7bookmarks.com/story20556814/explorer-blockchain-tron-an-overview-https-cuwip-ucsd-edu-members-georgeuncle0-activity-1839979