Block top - The block selection and length in the blockchain (in blocks) on development of the present 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://thegreatbookmark.com/story20294448/top-guidelines-of-explorer-blockchain-solana-https-clancy-olesen-4-mdwrite-net-opening-the-record-your-resource-to-blockchain-investigation