Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction number with the from address (Remember this starts off at 0 so a nonce of a hundred would basically be the one hundred and first transaction submitted https://bookmarkity.com/story20436146/not-known-details-about-blockchain-explorer-usdt-trc20-https-www-blurb-com-user-optionname7