Block top - The block number and length from the blockchain (in blocks) on creation of the current block Nonce - The transaction amount to the from address (Keep in mind this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://xyzbookmarks.com/story20273187/top-guidelines-of-explorer-blockchain-solana-https-www-demilked-com-author-brokerwhorl5