Block top - The block number and length in the blockchain (in blocks) on development of the present block Nonce - The transaction range with the from address (Remember this starts at 0 so a nonce of 100 would actually be the 101st transaction submitted by this account) Contract generation https://socialtechnet.com/story5734087/facts-about-tron-blockchain-explorer-revealed-https-atavi-com-share-xftxdaz1pgsb4