interface tmUSDCPosition {
  balance: number;        // Your tmUSDC balance
  exchangeRate: number;   // Current tmUSDC/USDC rate
  usdcValue: number;      // balance * exchangeRate
  earnedYield: number;    // Total yield earned
}

Day 0:   1 tmUSDC = 1.0000 USDC
Day 30:  1 tmUSDC = 1.0066 USDC (+0.66%)
Day 90:  1 tmUSDC = 1.0200 USDC (+2%)
Day 365: 1 tmUSDC = 1.0800 USDC (+8%)

function calculateYield(position: Position): number {
  const currentValue = position.tmUSDC * getCurrentExchangeRate();
  const originalValue = position.depositedUSDC;

  return currentValue - originalValue;
}

// Example
const deposited = 1000;  // USDC
const tmUSDC = 1000;     // Received at rate 1.0
const currentRate = 1.08; // After 1 year

const currentValue = 1000 * 1.08; // 1080 USDC
const yield = 1080 - 1000;        // 80 USDC profit

# Stake USDC
curl -X POST "https://api.usmewe.com/v1/vault/stake" \
  -H "Authorization: Bearer YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"amount": 1000}'

# Check position
curl -X GET "https://api.usmewe.com/v1/vault/position" \
  -H "Authorization: Bearer YOUR_TOKEN"