Block height - The block amount and size with the blockchain (in blocks) on generation 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 actually be the 101st transaction submitted by this account) https://top10bookmark.com/story20272933/5-simple-statements-about-blockchain-explorer-solana-explained-https-pad-fs-lmu-de-h2fzbno0rjqfpyic-69lxg