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 actually be the 101st transaction submitted by this account) https://ilovebookmarking.com/story20299777/blockchain-explorer-fundamentals-explained-https-gaiaathome-eu-gaiaathome-show-user-php-userid-1577569