Block top - The block quantity and length with the blockchain (in blocks) on generation 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 actually be the 101st transaction submitted by this account) https://bookmarking1.com/story20296722/how-blockchain-explorer-xrp-can-save-you-time-stress-and-money-https-pad-fs-lmu-de-h2fzbno0rjqfpyic-69lxg