Block top - The block number and size from the blockchain (in blocks) on development of the present block Nonce - The transaction selection for the from address (Remember this starts off at 0 so a nonce of a hundred would actually be the 101st transaction submitted by this account) https://bookmarkpath.com/story20200472/top-guidelines-of-explorer-blockchain-solana-https-clancy-olesen-4-mdwrite-net-opening-the-record-your-resource-to-blockchain-investigation