Block height - The block number and length 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://followbookmarks.com/story20684657/the-2-minute-rule-for-blockchain-explorer-solana-https-www-bitsdujour-com-profiles-iptrcw