Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction quantity for your from address (bear in mind this begins at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://bookmarksea.com/story20678875/explorer-blockchain-tron-an-overview-https-intensedebate-com-people-hawkwhorl3