Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction quantity to the from address (Keep in mind this commences at 0 so a nonce of one hundred would essentially be the one hundred and first transaction https://webnowmedia.com/story5878025/5-simple-statements-about-blockchain-explorer-solana-explained-https-www-instapaper-com-p-16864836