{
    "Function": "_buyFYTokenPreview",
    "File": "contracts/yieldspace/Pool.sol",
    "Parent Contracts": [
        "contracts/utils/access/Ownable.sol",
        "contracts/utils/token/ERC20Permit.sol",
        "contracts/interfaces/yieldspace/IPool.sol",
        "contracts/interfaces/external/IERC2612.sol",
        "contracts/utils/token/ERC20.sol",
        "contracts/interfaces/external/IERC20Metadata.sol",
        "contracts/interfaces/external/IERC20.sol"
    ],
    "High-Level Calls": [
        "YieldMath"
    ],
    "Internal Calls": [
        "require(bool,string)",
        "beforeMaturity"
    ],
    "Library Calls": [
        "baseInForFYTokenOut"
    ],
    "Low-Level Calls": [],
    "Code": "function _buyFYTokenPreview(\n        uint128 fyTokenOut,\n        uint128 baseBalance,\n        uint128 fyTokenBalance\n    )\n        private view\n        beforeMaturity\n        returns(uint128)\n    {\n        (int128 _k, int128 _g1) = (k1, g1);\n        uint128 baseIn = YieldMath.baseInForFYTokenOut(\n            baseBalance,\n            fyTokenBalance,\n            fyTokenOut,\n            maturity - uint32(block.timestamp),             // This can't be called after maturity\n            _k,\n            _g1\n        );\n\n        require(\n            fyTokenBalance - fyTokenOut >= baseBalance + baseIn,\n            \"Pool: fyToken balance too low\"\n        );\n\n        return baseIn;\n    }"
}