💰 TASAS DE INTERÉS Y LIQUIDACIONES en DeFi

Simulador de Liquidaciones

Jump Rate Model ” Solidity

contract JumpRateModel {
  uint256 public immutable baseRatePerYear;
  uint256 public immutable multiplierPerYear;
  uint256 public immutable jumpMultiplierPerYear;
  uint256 public immutable kink;

  function getBorrowRate(uint256 utilization)
    public view returns (uint256 rate) {
    if (utilization <= kink) {
      // Zona normal: tasa baja y lineal
      rate = baseRatePerYear + multiplierPerYear
          * utilization / 1e18;
    } else {
      // Zona de estrés: tasa sube agresivamente
      uint256 normalRate = baseRatePerYear
        + multiplierPerYear * kink / 1e18;
      uint256 excessUtil = utilization - kink;
      rate = normalRate + jumpMultiplierPerYear
          * excessUtil / 1e18;
    }
  }

  function liquidate(
    address borrower,
    uint256 repayAmount
  ) external {
    require(healthFactor(borrower) < 1e18, "Healthy");
    // Close factor: máximo 50% de la deuda por liquidación
    uint256 maxRepay = debts[borrower] * CLOSE_FACTOR / 100;
    require(repayAmount <= maxRepay);
    // Liquidator paga la deuda y recibe colateral + bonus
    uint256 collateralToSeize = repayAmount
      * (100 + LIQUIDATION_BONUS) / 100
      / ethPrice;
    collateral[borrower] -= collateralToSeize;
    collateral[msg.sender] += collateralToSeize;
    debts[borrower] -= repayAmount;
    USDC.transferFrom(msg.sender, address(this), repayAmount);
  }
}