Block top - The block number and length from the blockchain (in blocks) on creation of the current block Nonce - The transaction selection 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://hylistings.com/story21708950/5-simple-statements-about-blockchain-explorer-solana-explained-https-bbs-pku-edu-cn-v2-jump-to-php-url-https-cryptoexplorerhub-com