Block height - The block selection and size from the blockchain (in blocks) on generation of the current block Nonce - The transaction number for that from address (bear in mind this starts off at 0 so a nonce of 100 would basically be the a hundred and first transaction https://thebookpage.com/story6039194/5-simple-statements-about-blockchain-explorer-solana-explained-https-pad-fs-lmu-de-h2fzbno0rjqfpyic-69lxg