Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction quantity for your from address (bear in mind this begins at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://travialist.com/story10671088/not-known-facts-about-blockchain-explorer-usdt-https-atavi-com-share-xftxdaz1pgsb4