Block top - The block selection and length in the blockchain (in blocks) on development of the present block Nonce - The transaction number for your from address (Keep in mind this begins at 0 so a nonce of 100 would in fact be the one hundred and first transaction https://tealbookmarks.com/story20521868/the-blockchain-explorer-usdt-trc20-diaries-https-squareblogs-net-heartgarlic3-delving-into-blockchain-explorers