Block height - The block amount and size with the blockchain (in blocks) on development of the present block Nonce - The transaction selection for the from address (bear in mind this starts at 0 so a nonce of 100 would truly be the a hundred and first transaction submitted https://monobookmarks.com/story20316138/5-simple-statements-about-blockchain-explorer-solana-explained-https-www-instapaper-com-p-16864836