Block top - The block range and size on the blockchain (in blocks) on development of the present block Nonce - The transaction selection with the from address (bear in mind this starts at 0 so a nonce of 100 would actually be the 101st transaction submitted by this account) https://adsbookmark.com/story20442040/explorer-blockchain-things-to-know-before-you-buy-https-bbs-pku-edu-cn-v2-jump-to-php-url-https-cryptoexplorerhub-com