Block height - The block amount and size on 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 really be the a hundred and first transaction submitted https://dailyuploads.net/kv21pr0676da/Delving_into_the_Invisible_The_Importance_of_Blockchain_Explorers_in_the_Crypto_Worldznmrd.pdf