Block top - The block number and length from the blockchain (in blocks) on creation of the present block Nonce - The transaction number for the from address (bear in mind this starts at 0 so a nonce of 100 would really be the one hundred and first transaction submitted https://seolistlinks.com/story21784360/a-review-of-blockchain-explorer-xrp-https-writeablog-net-storeformat0-blockchain-in-the-microscope-exploring-the-unsung-resources