Block top - The block selection and duration of your blockchain (in blocks) on development 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://bookmarkssocial.com/story20298978/a-review-of-blockchain-explorer-xrp-https-wikimapia-org-external-link-url-https-cryptoexplorerhub-com