Block top - The block number and length from the blockchain (in blocks) on creation 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://crossbookmark.com/story20176755/how-blockchain-explorer-xrp-can-save-you-time-stress-and-money-https-www-webwiki-it-cryptoexplorerhub-com