Block top - The block number and length in the blockchain (in blocks) on development of the present block Nonce - The transaction number for your from address (Keep in mind this begins at 0 so a nonce of one hundred would essentially be the one hundred and first transaction https://thefairlist.com/story10893530/5-simple-statements-about-blockchain-explorer-solana-explained-https-independent-academia-edu-drewandreassen4