Block top - The block variety and duration of your blockchain (in blocks) on creation of the current block Nonce - The transaction variety with the from address (Remember this starts at 0 so a nonce of 100 would in fact be the one hundred and first transaction submitted by https://bookmark-vip.com/story20606512/blockchain-explorer-fundamentals-explained-https-pad-karuka-tech-vc6p2vmyr6a9ij1xxkanwg