Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction variety for that from address (Remember this starts off at 0 so a nonce of a hundred would truly be the 101st transaction submitted by this account) https://icelisting.com/story21910826/everything-about-blockchain-explorer-https-www-woorips-vic-edu-au-profile-jessenisrgibbons96537-profile