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 actually be the 101st transaction submitted by this account) https://singnalsocial.com/story5217904/explorer-blockchain-base-an-overview-https-atavi-com-share-xftxdaz1pgsb4