Block top - The block number and length on the blockchain (in blocks) on generation of the present block Nonce - The transaction quantity for the from address (bear in mind this starts at 0 so a nonce of 100 would truly be the a hundred and first transaction submitted https://bookmarkunit.com/story20270875/5-simple-statements-about-blockchain-explorer-solana-explained-https-www-instapaper-com-p-16864836