Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction quantity for your from address (bear in mind this begins at 0 so a nonce of 100 would truly be the 101st transaction submitted by this account) https://bookmarkgenious.com/story20431477/5-simple-statements-about-blockchain-explorer-solana-explained-https-files-fm-f-e6nkandt95