Block height - The block number and length from the blockchain (in blocks) on development of the present block Nonce - The transaction selection with 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://minibookmarks.com/story20802673/the-2-minute-rule-for-blockchain-explorer-solana-https-www-instapaper-com-p-16864836