Block top - The block number and duration on the blockchain (in blocks) on development of the present 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://whitebookmarks.com/story20513651/not-known-facts-about-blockchain-explorer-unconfirmed-transaction-https-www-pdc-edu-url-https-cryptoexplorerhub-com