Block top - The block variety and duration with the blockchain (in blocks) on generation of the present block Nonce - The transaction number 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://onelifesocial.com/story5811657/top-guidelines-of-explorer-blockchain-solana-http-pandora-nla-gov-au-external-html-link-https-cryptoexplorerhub-com