Block height - The block variety 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 actually be the 101st transaction submitted by this account) https://bookmarkja.com/story23106105/new-step-by-step-map-for-blockchain-explorer-unconfirmed-transaction-https-peatix-com-user-27717689