{
    "Function": "changeDuration",
    "File": "contracts/staking/InfinityStaker.sol",
    "Parent Contracts": [
        "node_modules/@openzeppelin/contracts/security/ReentrancyGuard.sol",
        "node_modules/@openzeppelin/contracts/security/Pausable.sol",
        "node_modules/@openzeppelin/contracts/access/Ownable.sol",
        "node_modules/@openzeppelin/contracts/utils/Context.sol",
        "contracts/interfaces/IStaker.sol"
    ],
    "High-Level Calls": [],
    "Internal Calls": [
        "whenNotPaused",
        "nonReentrant",
        "require(bool,string)",
        "require(bool,string)",
        "require(bool,string)"
    ],
    "Library Calls": [],
    "Low-Level Calls": [],
    "Code": "function changeDuration(\n    uint256 amount,\n    Duration oldDuration,\n    Duration newDuration\n  ) external override nonReentrant whenNotPaused {\n    require(amount != 0, 'amount cant be 0');\n    require(\n      userstakedAmounts[msg.sender][oldDuration].amount >= amount,\n      'insufficient staked amount to change duration'\n    );\n    require(newDuration > oldDuration, 'new duration must be greater than old duration');\n\n    // update storage\n    userstakedAmounts[msg.sender][oldDuration].amount -= amount;\n    userstakedAmounts[msg.sender][newDuration].amount += amount;\n    // update timestamp for new duration\n    userstakedAmounts[msg.sender][newDuration].timestamp = block.timestamp;\n    // only update old duration timestamp if old duration amount is 0\n    if (userstakedAmounts[msg.sender][oldDuration].amount == 0) {\n      userstakedAmounts[msg.sender][oldDuration].timestamp = 0;\n    }\n    // emit event\n    emit DurationChanged(msg.sender, amount, oldDuration, newDuration);\n  }"
}