Oracles & Proof of Reserves

NAV Feed: TBD

// Chainlink Aggregator interface
AggregatorV3Interface navFeed = AggregatorV3Interface(NAV_FEED_ADDRESS);

(
    uint80 roundId,
    int256 navPerToken,
    uint256 startedAt,
    uint256 updatedAt,
    uint80 answeredInRound
) = navFeed.latestRoundData();

// NAV is in BTC with 18 decimals
// Example: 1.05e18 = 1.05 BTC per token

PoR Feed: TBD

Buffer BTC (Archax) + SSBAF Units * SSBAF NAV >= iBTCY Supply * NAV per Token

// Chainlink PoR interface
AggregatorV3Interface porFeed = AggregatorV3Interface(POR_FEED_ADDRESS);

(
    uint80 roundId,
    int256 reserves,
    uint256 startedAt,
    uint256 updatedAt,
    uint80 answeredInRound
) = porFeed.latestRoundData();

// Compare reserves to total supply
uint256 totalSupply = IERC20(IBTCY_ADDRESS).totalSupply();
uint256 navPerToken = /* from NAV feed */;

bool fullyBacked = reserves >= totalSupply * navPerToken / 1e18;

function getBTCYPrice() external view returns (uint256) {
    (, int256 nav,, uint256 updatedAt,) = navFeed.latestRoundData();
    
    // Reject data older than 36 hours (aligns with internal pause band; see /product/transparency)
    require(block.timestamp - updatedAt < 36 hours, "Stale NAV");
    
    return uint256(nav);
}