Block top - The block number and size on the blockchain (in blocks) on generation of the present block Nonce - The transaction amount to the from address (Remember this starts off at 0 so a nonce of a hundred would actually be the 101st transaction submitted by this account) https://bookmarkinglive.com/story21552071/a-review-of-blockchain-explorer-xrp-http-bioimagingcore-be-q2a-user-storegarlic8