Block top - The block number and length from the blockchain (in blocks) on development of the current block Nonce - The transaction range 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://socialistener.com/story6035556/5-simple-statements-about-blockchain-explorer-solana-explained-https-independent-academia-edu-drewandreassen4