ReservoirHelper

{{
  "language": "Solidity",
  "sources": {
    "@openzeppelin/contracts/token/ERC20/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the value of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 value) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}
"
    },
    "contracts/helpers/ReservoirHelper.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity 0.8.24;
pragma abicoder v1;

import "../interfaces/Reservoir.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

/**
 * @title ReservoirHelper
 * @notice Helper that performs onchain calculation required to call a Reservoir contract and returns corresponding caller and data
 */
contract ReservoirHelper {

    function swapRUSD(
        uint256 amountIn,
        ICreditEnforcer creditEnforcerAddress,
        IPegStabilityModule psmAddress,
        bool isRedeem,
        uint256 decimal_factor
    ) external pure returns (address target, address sourceTokenInteractionTarget, uint256 actualSwapAmount, bytes memory data) {
        if (isRedeem) {
            bytes memory resultData = abi.encodeCall(psmAddress.redeem, (amountIn / 10 ** (18 - decimal_factor) ));
            return (address(psmAddress), address(psmAddress), amountIn, resultData);
        } else {
            bytes memory resultData = abi.encodeCall(creditEnforcerAddress.mintStablecoin, (amountIn));
            return (address(creditEnforcerAddress), address(psmAddress), amountIn, resultData);
        }
    }

    function swapSRUSD(
        uint256 amountIn,
        ICreditEnforcer creditEnforcerAddress,
        ISavingsModule smAddress,
        bool isRedeem
    ) external view returns (address target, address sourceTokenInteractionTarget, uint256 actualSwapAmount, bytes memory data) {
        if (isRedeem) {
            // This calculation is an inversion of the formula used in SavingsModule.redeem:
            // srusd.burnFrom(from, (burnAmount * (1e6 + redeemFee)) / 1e6);
            uint256 burnAmount = _ceilDiv(amountIn * 1e6, 1e6 + smAddress.redeemFee());
            // Amount is the inversion of the following formula:
            // Math.ceilDiv(amount * 1e8, _currentPrice());
            bytes memory resultData = abi.encodeCall(smAddress.redeem, (burnAmount * smAddress.currentPrice() / 1e8));
            return (address(smAddress), address(smAddress), amountIn, resultData);
        } else {
            bytes memory resultData = abi.encodeCall(creditEnforcerAddress.mintSavingcoin, (amountIn));
            return (address(creditEnforcerAddress), address(smAddress), amountIn, resultData);
        }
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function _ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }
}
"
    },
    "contracts/interfaces/Reservoir.sol": {
      "content": "// SPDX-License-Identifier: GPL-3.0-only

pragma solidity 0.8.24;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";


interface ICreditEnforcer {
    function mintStablecoin(uint256 amount) external returns (uint256);
    function mintSavingcoin(uint256 amount) external returns (uint256);
}

interface IPegStabilityModule {
    function redeem(uint256 amount) external;
}

interface ISavingsModule {
    function redeem(uint256 amount) external;
    function currentPrice() external view returns (uint256);
    function redeemFee() external view returns (uint256);
}
"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": true,
      "runs": 1000000
    },
    "evmVersion": "cancun",
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    },
    "metadata": {
      "useLiteralContent": true
    }
  }
}}