Block top - The block number and size from the blockchain (in blocks) on development of the current block Nonce - The transaction variety for that 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://pageoftoday.com/story5721032/5-simple-statements-about-blockchain-explorer-solana-explained-https-md-kif-rocks-qxb6ylbntwcjnvrpqnzeqw