Block top - The block selection and duration of the blockchain (in blocks) on creation of the present block Nonce - The transaction selection with the from address (bear in mind this starts at 0 so a nonce of 100 would actually be the 101st transaction submitted by this account) https://livebackpage.com/story5722140/the-best-side-of-explorer-blockchain-usdt-https-www-webwiki-co-uk-cryptoexplorerhub-com