Block top - The block number and size with the 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://businessbookmark.com/story5809176/new-step-by-step-map-for-blockchain-explorer-unconfirmed-transaction-https-www-mixcloud-com-brokerfridge5