Block top - The block number and length from the blockchain (in blocks) on creation 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://thebookmarkfree.com/story20380174/5-tips-about-blockchain-explorer-you-can-use-today-https-heavenarticle-com-author-pathpastor4-452336