{
    "Function": "unstake",
    "File": "contracts/DelegatedStaking.sol",
    "Parent Contracts": [
        "node_modules/@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol",
        "node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol",
        "node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol"
    ],
    "High-Level Calls": [],
    "Internal Calls": [
        "require(bool,string)",
        "_updateGlobalExchangeRate",
        "_tokensToShares",
        "require(bool,string)",
        "require(bool,string)",
        "require(bool,string)",
        "_tokensToShares",
        "require(bool,string)",
        "require(bool,string)",
        "_updateValidator"
    ],
    "Library Calls": [],
    "Low-Level Calls": [],
    "Code": "function unstake(uint128 validatorId, uint128 amount) public {\n        require(validatorId < validatorsN, \"Invalid validator\");\n        Validator storage v = validators[validatorId];\n        Staking storage s = v.stakings[msg.sender];\n        require(s.staked >= amount, \"Staked < amount provided\");\n        bool isValidator = msg.sender == v._address;\n        _updateGlobalExchangeRate();\n        _updateValidator(v);\n        // only update if the validator is enabled, otherwise the global shares were already excluded during disableValidator call and the rest does not matter anymore\n        uint128 validatorSharesRemove = _tokensToShares(amount, v.exchangeRate);\n        require(validatorSharesRemove > 0, \"Unstake amount is too small\");\n        if (v.disabledEpoch == 0){\n            // if validator is enabled and the program has not ended -> check for unstaking beyond max cap or min stake required\n            if (isValidator && endEpoch > block.number){\n                uint128 newValidatorStaked = s.staked - amount;\n                uint128 newValidatorMaxCap = newValidatorStaked * maxCapMultiplier;\n                uint128 delegated = v.delegated - s.staked;\n                require(delegated <= newValidatorMaxCap, \"Cannot unstake beyond max cap\");\n                require(newValidatorStaked >= validatorMinStakedRequired, \"Unstake > min staked required\");\n            }\n\n            // update global shares #\n            uint128 globalSharesRemove = _tokensToShares(amount, globalExchangeRate);\n            require(globalSharesRemove > 0, \"Unstake amount is too small\");\n            unchecked { totalGlobalShares -= globalSharesRemove;}\n            unchecked { v.globalShares -= globalSharesRemove; }\n\n            // update validator shares #\n            unchecked { v.totalShares -= validatorSharesRemove; }\n            unchecked { v.delegated -= amount; }\n        }\n        unchecked { s.shares -= validatorSharesRemove; }\n        unchecked { s.staked -= amount; }\n\n        // create unstaking instance\n        uint128 coolDownEnd = v.disabledEpoch != 0 ? v.disabledEpoch : uint128(block.number);\n        unchecked { coolDownEnd += (isValidator ? validatorCoolDown : delegatorCoolDown); }\n        v.unstakings[msg.sender].push(Unstaking( coolDownEnd, amount));\n        emit Unstaked(validatorId, msg.sender, amount);\n    }"
}