{
    "Function": "_stake",
    "File": "src/UniStaker.sol",
    "Parent Contracts": [
        "lib/openzeppelin-contracts/contracts/utils/Nonces.sol",
        "lib/openzeppelin-contracts/contracts/utils/cryptography/EIP712.sol",
        "lib/openzeppelin-contracts/contracts/interfaces/IERC5267.sol",
        "lib/openzeppelin-contracts/contracts/utils/Multicall.sol",
        "src/interfaces/INotifiableRewardReceiver.sol"
    ],
    "High-Level Calls": [],
    "Internal Calls": [
        "_stakeTokenSafeTransferFrom",
        "_checkpointReward",
        "_fetchOrDeploySurrogate",
        "_useDepositId",
        "_revertIfAddressZero",
        "_revertIfAddressZero",
        "_checkpointGlobalReward"
    ],
    "Library Calls": [],
    "Low-Level Calls": [],
    "Code": "function _stake(address _depositor, uint256 _amount, address _delegatee, address _beneficiary)\n    internal\n    returns (DepositIdentifier _depositId)\n  {\n    _revertIfAddressZero(_delegatee);\n    _revertIfAddressZero(_beneficiary);\n\n    _checkpointGlobalReward();\n    _checkpointReward(_beneficiary);\n\n    DelegationSurrogate _surrogate = _fetchOrDeploySurrogate(_delegatee);\n    _depositId = _useDepositId();\n\n    totalStaked += _amount;\n    depositorTotalStaked[_depositor] += _amount;\n    earningPower[_beneficiary] += _amount;\n    deposits[_depositId] = Deposit({\n      balance: _amount,\n      owner: _depositor,\n      delegatee: _delegatee,\n      beneficiary: _beneficiary\n    });\n    _stakeTokenSafeTransferFrom(_depositor, address(_surrogate), _amount);\n    emit StakeDeposited(_depositor, _depositId, _amount, _amount);\n    emit BeneficiaryAltered(_depositId, address(0), _beneficiary);\n    emit DelegateeAltered(_depositId, address(0), _delegatee);\n  }"
}