Block top - The block selection and duration from the blockchain (in blocks) on creation of the current block Nonce - The transaction variety with the from address (Remember this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) Contract creation https://brightbookmarks.com/story20728199/the-smart-trick-of-blockchain-explorer-app-that-nobody-is-discussing-https-skitterphoto-com-photographers-1387379-jimenez-deleuran