Block top - The block selection and duration of your blockchain (in blocks) on generation of the present block Nonce - The transaction selection for the from address (bear in mind this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://bookmark-nation.com/story20321017/the-smart-trick-of-explorer-blockchain-ethereum-that-nobody-is-discussing-https-pad-karuka-tech-vc6p2vmyr6a9ij1xxkanwg