Block top - The block selection and duration of the blockchain (in blocks) on creation of the current 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://ok-social.com/story6026834/blockchain-explorer-fundamentals-explained-http-pandora-nla-gov-au-external-html-link-https-cryptoexplorerhub-com