Block top - The block number and length of the blockchain (in blocks) on generation of the present block Nonce - The transaction number for your from address (bear in mind this begins at 0 so a nonce of 100 would truly be the a hundred and first transaction submitted https://nimmansocial.com/story10500023/what-does-blockchain-explorer-usdt-mean-https-peatix-com-user-27717689