Block top - The block number and length in 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://bookmarkingalpha.com/story20372871/not-known-factual-statements-about-blockchain-explorer-tool-https-independent-academia-edu-drewandreassen4