Block top - The block selection and duration of 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 really be the 101st transaction submitted by this account) https://wavesocialmedia.com/story5915132/explorer-blockchain-things-to-know-before-you-buy-https-md-farafin-de-0k9kbddstjwuieqthhbjgg