6.2 Issuance mechanism: dual guarantee of diversified mortgage and transparent casting

The issuance of USO strictly follows the principle of "collateral value ≥ issuance volume", and through the "mixed mortgage pool + transparent casting on the chain" mechanism, it ensures that each USO has sufficient asset backing to eliminate the risk of "unsecured over-issuance".

1. Diversified mortgage pools: a risk-resistant "stability triangle" The issuance of USO is based on a mixed pool of three types of collateral, forming the underlying support for risk diversification. The specific proportion can be dynamically adjusted through community governance (the default ratio is as follows):

Cryptocurrences (40% -60%): including BTC, ETH, BNB and other mainstream assets, with high liquidity and market acceptance, locked through on-chain contracts, as a "elastic buffer" for the mortgage pool;

Fiat currency stablecoins (20% -40%): including USDT, USDC and other compliance stablecoins, with minimal value fluctuations, need to confirm the authenticity of the reserve through on-chain audit, as the "basic anchor" of the mortgage pool;

Real assets (RWA, 10% -20%): Includes off-chain assets such as gold and government bonds (represented by on-chain certificates issued by compliance institutions), which have low correlation with the crypto market, strong anti-inflation ability, and serve as "anti-cyclical protection" for mortgage pools.

The assets of the mortgage pool need to meet the "real-time on-chain check", and users can check the quantity, value and proportion of each type of asset through the front end of the agreement to ensure the transparency of the issuance.

1. Foundry and Redemption Process: Automated Execution on the Whole Chain

Casting (generating USO)： The user needs to inject compliance assets (such as 1 BTC + 1000 USDT) into the mortgage pool, the system evaluates the asset value through the on-chain oracle, and generates USO according to "the number of minted USO = the total value of collateral × the dynamic mortgage rate" (the default is 100%, and the assets with low risk factor can be appropriately increased to 110%), which is directly issued to the user's wallet; In special scenarios, users can mint USO through "subscription stablecoin bonds": use USDT to subscribe bonds at a 1:1 ratio, USDT enters the treasury as a reserve, the system simultaneously mints the same amount of USO, and automatically unlocks the bonds after maturity (no lock-up period, support redemption at any time).

Redemption (destruction of USO): When a user destroys USO, the system automatically releases the corresponding value of collateral according to "Collateral Redemption Ratio = Number of USO Destroyed/Total Circulation" (supports the selection of single or multiple assets), and the redemption process requires a 0.1% handling fee (used to supplement the risk reserve); If the value of the collateral increases due to market fluctuations, the user can receive 50% of the excess at the time of redemption (the remaining 50% is injected into the state treasury), incentivizing the user to hold the collateral for a long time.