Block top - The block selection and length of your blockchain (in blocks) on generation of the present block Nonce - The transaction number 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://altbookmark.com/story22184792/not-known-facts-about-blockchain-explorer-unconfirmed-transaction-https-md-kif-rocks-qxb6ylbntwcjnvrpqnzeqw