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 actually be the 101st transaction submitted by this account) https://gogogobookmarks.com/story20313367/top-guidelines-of-explorer-blockchain-solana-https-www-demilked-com-author-brokerwhorl5