Block top - The block selection and length in the blockchain (in blocks) on development of the present block Nonce - The transaction number for your from address (Keep in mind this commences at 0 so a nonce of a hundred would actually be the a hundred and first transaction https://bookmarkinglive.com/story21565274/how-blockchain-explorer-xrp-can-save-you-time-stress-and-money-https-fletcher-odonnell-thoughtlanes-net-exploring-further-the-world-of-blockchain