Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction variety 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://tbookmark.com/story20099713/not-known-factual-statements-about-blockchain-explorer-tool-https-telegra-ph-blockchain-trackers-the-key-to-grasping-copyright-transactions-09-04