Block top - The block number and length of your blockchain (in blocks) on generation of the present block Nonce - The transaction number for your from address (bear in mind this commences at 0 so a nonce of 100 would actually be the 101st transaction submitted by this account) https://funny-lists.com/story21710574/not-known-details-about-blockchain-explorer-ltc-https-www-blurb-com-user-optionname7