Block top - The block selection and length from the blockchain (in blocks) on development of the present block Nonce - The transaction selection for the from address (bear in mind this begins at 0 so a nonce of one hundred would essentially be the one hundred and first transaction https://minibookmarks.com/story20578782/a-review-of-blockchain-explorer-xrp-https-codimd-fiksel-info-7obh-70jsduk4-4exx8mba