Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction selection for the from address (Remember this starts at 0 so a nonce of 100 would actually be the 101st transaction submitted by this account) Contract generation https://bookmarknap.com/story10938616/the-smart-trick-of-blockchain-explorer-app-that-nobody-is-discussing-https-codimd-fiksel-info-7obh-70jsduk4-4exx8mba