Block top - The block variety and duration of the blockchain (in blocks) on development of the current 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://topsocialplan.com/story6294287/the-definitive-guide-to-explorer-blockchain-ethereum-https-atavi-com-share-xftxdaz1pgsb4