Block height - The block amount and size on the blockchain (in blocks) on generation of the present block Nonce - The transaction number for your from address (bear in mind this begins at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://myfirstbookmark.com/story20860003/5-simple-statements-about-blockchain-explorer-solana-explained-https-skitterphoto-com-photographers-1387379-jimenez-deleuran