Block top - The block number and length of the blockchain (in blocks) on generation of the current block Nonce - The transaction number for the from address (Remember this starts off at 0 so a nonce of one hundred would really be the 101st transaction submitted by this account) https://socialtechnet.com/story6131513/what-does-blockchain-explorer-usdt-mean-https-www-orkhonschool-edu-mn-profile-coxqonpallesen82836-profile