TopBidder is a radical auction protocol based on ERC721 standard. It adopts the theory of Radical Market and implements a crypto vickery commons’(rNFT) production and auction mechanism. Every rNFT has a self-pricing mechanism with bonding curve model The artist can earn 50% of the premium when a bidder bid with a higher price. So they become the shareholder of their artworks. And the former bidder can earn 30% of the premium as subsidy