Block top - The block selection and duration of the blockchain (in blocks) on creation of the present block Nonce - The transaction selection with the 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://socialrator.com/story11700142/the-2-minute-rule-for-blockchain-explorer-solana-https-clancy-olesen-4-mdwrite-net-opening-the-record-your-resource-to-blockchain-investigation