Block top - The block number and length on the blockchain (in blocks) on generation of the present block Nonce - The transaction number for your from address (Keep in mind this commences at 0 so a nonce of a hundred would in fact be the 101st transaction submitted by https://active-bookmarks.com/story20506194/top-guidelines-of-explorer-blockchain-solana-https-pinshape-com-auth-users-auth-google