Block height - The block amount and length in the blockchain (in blocks) on development of the current block Nonce - The transaction range for the from address (bear in mind this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://bookmark-media.com/story20323070/new-step-by-step-map-for-blockchain-explorer-unconfirmed-transaction-https-md-farafin-de-0k9kbddstjwuieqthhbjgg