Block top - The block selection and length in 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://bookmarkerz.com/story20464719/explorer-blockchain-things-to-know-before-you-buy-https-mathiasen-curry-2-federatedjournals-com-diving-deep-blockchain-explorers