{
    "Function": "buyFYToken",
    "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": [
        "SafeCast128",
        "SafeCast128",
        "MinimalTransferHelper"
    ],
    "Internal Calls": [
        "_update",
        "require(bool,string)",
        "_buyFYTokenPreview",
        "require(bool,string)",
        "getBaseBalance"
    ],
    "Library Calls": [
        "safeTransfer",
        "i128",
        "i128"
    ],
    "Low-Level Calls": [],
    "Code": "function buyFYToken(address to, uint128 fyTokenOut, uint128 max)\n        external override\n        returns(uint128)\n    {\n        // Calculate trade\n        uint128 baseBalance = getBaseBalance();\n        (uint112 _baseCached, uint112 _fyTokenCached) =\n            (baseCached, fyTokenCached);\n        uint128 baseIn = _buyFYTokenPreview(\n            fyTokenOut,\n            _baseCached,\n            _fyTokenCached\n        );\n        require(\n            baseBalance - _baseCached >= baseIn,\n            \"Pool: Not enough base token in\"\n        );\n\n        // Slippage check\n        require(\n            baseIn <= max,\n            \"Pool: Too much base token in\"\n        );\n\n        // Update TWAR\n        _update(\n            _baseCached + baseIn,\n            _fyTokenCached - fyTokenOut,\n            _baseCached,\n            _fyTokenCached\n        );\n\n        // Transfer assets\n        IERC20(address(fyToken)).safeTransfer(to, fyTokenOut);\n\n        emit Trade(maturity, msg.sender, to, -(baseIn.i128()), fyTokenOut.i128());\n        return baseIn;\n    }"
}