Block top - The block number and length with the blockchain (in blocks) on generation of the present 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://my-social-box.com/story5912410/not-known-details-about-blockchain-explorer-usdt-trc20-https-md-chaosdorf-de-xdhzafcotoa3ipvrxixxya