Block height - The block variety and size on the blockchain (in blocks) on development 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://socialaffluent.com/story6141950/5-simple-statements-about-blockchain-explorer-solana-explained-https-pad-stuve-uni-ulm-de-qjwqtezvsfelat3ec1kc9q