Block top - The block selection 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 commences at 0 so a nonce of one hundred would essentially be the one hundred and first transaction https://bookmarkity.com/story20312105/the-2-minute-rule-for-blockchain-explorer-solana-https-www-dermandar-com-user-quietquiet9