Block top - The block number and length from the blockchain (in blocks) on creation of the current 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://bookmarksknot.com/story22277503/not-known-details-about-blockchain-explorer-usdt-trc20-https-cuwip-ucsd-edu-members-georgeuncle0-activity-1839979