# Collection Vault ## Introduction As a map of popular NFTs, the market price of collections is a key indicator. However, when we attempted to integrate collections into the MOPN economic system, we encountered a challenge: as a fully on-chain game, how can we obtain information about NFT prices solely from on-chain data, without relying on a centralized oracle system, and prevent price manipulation? To address this, we've established collection vault, which capture signals related to floor prices and trading activity through the auto-bid/auto-ask mechanism. This provides an innovation automated market maker solution for the NFT market. ## Vault * Each collection has its own vault. * The vault balance contains only $MT, sourced from a 5% share of NFT earnings and from staking. * The amount of $MT in the vault determines the collection point. * By staking $MT to the collection vault, you can boost the collection point and also share in the vault's earnings. ## Stake * By staking $MT to any collection vault, you will boost the collection point, and receive the earnings from collection vault. * Each Collection Vault issues $vtoken as staking shares. You will receive $vtoken in proportion to the amount of $MT you stake in the vault. * At any time, you can redeem them, including the earnings, for $MT from the vault based on your stake shares. ## Auto-Bid * The vault automatically makes bids for the collection NFTs, with prices updated in real-time. * NFT holders can accept the bid to sell their own NFTs to the vault and receive $MT in return. * The bid price is initially calculated as 20% of the collection vault balance. * After the first vault ask transaction, the initial bid price is set to 75% of the vault's last ask price, increasing by 0.05% per block, with a maximum limit of 20% of the collection vault balance. ## Auto-Ask * After the NFT holder successfully accepts the bid from the vault, the vault automatically initiates the Dutch Auction for the NFT. * The auction ask price starts at 125% of the bid price in $MT, and decreases by 0.05% per block, reaching a minimum of 1 $MT. * Anyone can buy the NFT at the current price. * After the auction is completed, 99.5% of the final price goes directly into the vault, and the remaining 0.5% is burned. * When a collection is auctioning an NFT, staking $MT is not allowed. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://litepaper.mopn.xyz/collection-vault.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.