TRUUStaking

{{
  "language": "Solidity",
  "sources": {
    "@openzeppelin/contracts/access/Ownable.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}
"
    },
    "@openzeppelin/contracts/security/Pausable.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        require(!paused(), "Pausable: paused");
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        require(paused(), "Pausable: not paused");
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}
"
    },
    "@openzeppelin/contracts/security/ReentrancyGuard.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }
}
"
    },
    "@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}
"
    },
    "@openzeppelin/contracts/token/ERC20/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}
"
    },
    "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
    }
}
"
    },
    "@openzeppelin/contracts/utils/Address.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}
"
    },
    "@openzeppelin/contracts/utils/Context.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}
"
    },
    "contracts/TRUUStaking.sol": {
      "content": "// SPDX-License-Identifier: MIT\r
pragma solidity 0.8.30;\r
\r
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';\r
import '@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol';\r
import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';\r
import '@openzeppelin/contracts/access/Ownable.sol';\r
import '@openzeppelin/contracts/security/ReentrancyGuard.sol';\r
import '@openzeppelin/contracts/security/Pausable.sol';\r
\r
/**\r
 * @title TRUUStaking (v2 draft)\r
 * @notice Flexible-join staking with a fixed program end. Rewards accrue weekly per position\r
 *         at a snapshot rate determined by tier thresholds based on the individual deposit amount\r
 *         at stake time (not global liquidity).\r
 *\r
 *         Funding model: rewards must be pre-funded by owner (e.g., promotional nodes / CF top-ups).\r
 */\r
contract TRUUStaking is Ownable, ReentrancyGuard, Pausable {\r
  using SafeERC20 for IERC20;\r
\r
  // ---------------------------------------------------------------------------\r
  // Constants\r
  // ---------------------------------------------------------------------------\r
  uint256 public constant ONE_WEEK = 1 weeks;\r
\r
  // ---------------------------------------------------------------------------\r
  // Errors (legacy-compatible + v2 internals)\r
  // ---------------------------------------------------------------------------\r
  // Legacy-compatible\r
  error AddressIsZero();\r
  error AmountIsZero();\r
  error StakingClosed();\r
  error NoActiveStake();\r
  error NoRewardsDue();\r
  error StakeLocked();\r
  error NoUnusedRewards();\r
  error RewardsNotOpen();\r
  // v2 internals\r
  error ProgramNotStarted();\r
  error ProgramEnded();\r
  error NoPosition();\r
  error NothingToClaim();\r
  error NotWithdrawable();\r
\r
  // ---------------------------------------------------------------------------\r
  // Events (legacy + v2)\r
  // ---------------------------------------------------------------------------\r
  // Legacy-compatible events\r
  /// @notice Emitted when a user stakes and a new position is created (legacy UI listener)\r
  event Staked(address indexed user, uint256 amount);\r
  /// @notice Emitted when a user claims rewards via the legacy aggregate function\r
  /// @param user The user receiving rewards\r
  /// @param amount The total rewards transferred in this call\r
  /// @param weekNumber The cumulative program week at the time of claim (capped)\r
  event RewardClaimed(address indexed user, uint256 amount, uint256 weekNumber);\r
  /// @notice Emitted when a user withdraws principal via the legacy aggregate function\r
  event StakeWithdrawn(address indexed user, uint256 amount);\r
  /// @notice Emitted when the owner funds the reward buffer\r
  event RewardsDeposited(uint256 amount);\r
  /// @notice Emitted when the owner withdraws surplus reward tokens\r
  event RewardsWithdrawn(uint256 amount);\r
  // V2 detailed events\r
  /// @notice Emitted when a specific per-user position is created\r
  /// @param user The user address\r
  /// @param index The index of the new position for the user\r
  /// @param amount The principal amount staked\r
  /// @param rateBps Snapshot reward rate in basis points for this position\r
  /// @param startTime Timestamp when the position started\r
  event PositionCreated(address indexed user, uint256 indexed index, uint256 amount, uint16 rateBps, uint256 startTime);\r
  /// @notice Emitted when a specific position claims rewards\r
  /// @param user The user address\r
  /// @param index The index of the position\r
  /// @param amount The reward paid this call\r
  /// @param weeksClaimed The number of new weeks claimed in this call\r
  /// @param cumulativeWeeks The total weeks elapsed for this position after the claim\r
  event V2RewardClaimed(address indexed user, uint256 indexed index, uint256 amount, uint256 weeksClaimed, uint256 cumulativeWeeks);\r
  /// @notice Emitted when a specific position withdraws principal after program end\r
  event PositionWithdrawn(address indexed user, uint256 indexed index, uint256 principal);\r
\r
  // ---------------------------------------------------------------------------\r
  // Storage\r
  // ---------------------------------------------------------------------------\r
  IERC20 public immutable stakingToken;\r
  uint256 public immutable programStart;\r
  uint256 public immutable programEnd;\r
\r
  uint256 public totalLocked;\r
\r
  // Tiers are evaluated against the individual deposit amount at stake time\r
  uint256[] public thresholds; // ascending thresholds in token units\r
  uint16[] public ratesBps;    // length = thresholds.length + 1, last is top tier (>= last threshold)\r
\r
  struct Position {\r
    uint128 principal;\r
    uint16 rateBps;       // snapshot at deposit\r
    uint16 claimedWeeks;  // number of weeks already claimed\r
    uint64 startTime;     // position start timestamp\r
  }\r
\r
  mapping(address => Position[]) private userPositions;\r
\r
  // ---------------------------------------------------------------------------\r
  // Constructor\r
  // ---------------------------------------------------------------------------\r
  constructor(\r
    address _token,\r
    uint256 _programStart,\r
    uint256 _programEnd,\r
    uint256[] memory _thresholds,\r
    uint16[] memory _ratesBps\r
  ) {\r
    if (_token == address(0)) revert AddressIsZero();\r
    if (_programEnd <= _programStart) revert ProgramNotStarted();\r
    if (_thresholds.length == 0 || _ratesBps.length != _thresholds.length + 1) revert ProgramNotStarted();\r
\r
    stakingToken = IERC20(_token);\r
    programStart = _programStart;\r
    programEnd = _programEnd;\r
\r
    thresholds = _thresholds;\r
    ratesBps = _ratesBps;\r
  }\r
\r
  // ---------------------------------------------------------------------------\r
  // Views\r
  // ---------------------------------------------------------------------------\r
  /// @notice Returns the number of positions held by a user\r
  /// @param user The user to query\r
  /// @return The number of positions stored for the user\r
  function positionsLength(address user) external view returns (uint256) {\r
    return userPositions[user].length;\r
  }\r
\r
  /// @notice Returns the details of a position\r
  /// @dev Reverts if index is out of bounds\r
  /// @param user The owner of the position\r
  /// @param index The index in the user's positions array\r
  /// @return principal The staked principal\r
  /// @return rateBps_ The snapshot reward rate (bps) for the position\r
  /// @return claimedWeeks_ The number of weeks already claimed\r
  /// @return startTime The position start timestamp\r
  function getPosition(address user, uint256 index)\r
    external\r
    view\r
    returns (uint256 principal, uint16 rateBps_, uint16 claimedWeeks_, uint256 startTime)\r
  {\r
    Position storage p = _getPosition(user, index);\r
    return (p.principal, p.rateBps, p.claimedWeeks, p.startTime);\r
  }\r
\r
  /// @notice Computes the tier reward rate (bps) for a given deposit amount\r
  /// @dev Used to snapshot a position's rate at deposit time based solely on the deposit amount\r
  /// @param depositAmount The principal amount being deposited\r
  /// @return The rate in basis points for the tier that matches depositAmount\r
  function currentTierBps(uint256 depositAmount) public view returns (uint16) {\r
    uint256 len = thresholds.length;\r
    for (uint256 i = 0; i < len; i++) {\r
      if (depositAmount < thresholds[i]) return ratesBps[i];\r
    }\r
    return ratesBps[len]; // top tier for >= last threshold\r
  }\r
\r
  /// @notice Returns the pending reward and weeks to claim for a specific position\r
  /// @param user The position owner\r
  /// @param index The position index\r
  /// @return reward The pending reward amount in token units\r
  /// @return weeksToClaim The number of full weeks newly claimable\r
  function rewardsDue(address user, uint256 index) external view returns (uint256 reward, uint256 weeksToClaim) {\r
    Position storage p = _getPosition(user, index);\r
    if (p.principal == 0) return (0, 0);\r
    uint256 end = block.timestamp < programEnd ? block.timestamp : programEnd;\r
    if (end <= p.startTime) return (0, 0);\r
\r
    uint256 weeksElapsed = (end - uint256(p.startTime)) / ONE_WEEK;\r
    if (weeksElapsed <= p.claimedWeeks) return (0, 0);\r
\r
    weeksToClaim = weeksElapsed - p.claimedWeeks;\r
    reward = (uint256(p.principal) * uint256(p.rateBps) * weeksToClaim) / 10_000;\r
  }\r
\r
  // Legacy-compatible aggregate view\r
  /// @notice Returns aggregate pending rewards across all positions for a user (legacy view)\r
  /// @param user The user to query\r
  /// @return reward The sum of rewards due across all positions\r
  /// @return weeksToClaim The sum of weeks to claim across positions (for legacy UI)\r
  function rewardsDue(address user) external view returns (uint256 reward, uint256 weeksToClaim) {\r
    Position[] storage arr = userPositions[user];\r
    uint256 end = block.timestamp < programEnd ? block.timestamp : programEnd;\r
    for (uint256 i = 0; i < arr.length; i++) {\r
      Position storage p = arr[i];\r
      if (p.principal == 0 || end <= p.startTime) continue;\r
      uint256 weeksElapsed = (end - uint256(p.startTime)) / ONE_WEEK;\r
      if (weeksElapsed <= p.claimedWeeks) continue;\r
      uint256 w = weeksElapsed - p.claimedWeeks;\r
      weeksToClaim += w;\r
      reward += (uint256(p.principal) * uint256(p.rateBps) * w) / 10_000;\r
    }\r
  }\r
\r
  // ---------------------------------------------------------------------------\r
  // Mutations\r
  // ---------------------------------------------------------------------------\r
  /// @notice Stake tokens to create a new position at the current tier rate\r
  /// @dev Emits PositionCreated and legacy Staked; snapshots per-position rate at deposit\r
  /// @param amount The principal amount to stake (token units)\r
  function stake(uint256 amount) external nonReentrant whenNotPaused {\r
    _stake(amount);\r
  }\r
\r
  /// @notice Stake tokens using EIP-2612 permit to skip prior approve\r
  /// @param amount The principal amount to stake (token units)\r
  /// @param deadline Permit validity deadline (unix timestamp)\r
  /// @param v ECDSA v\r
  /// @param r ECDSA r\r
  /// @param s ECDSA s\r
  function stakeWithPermit(uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external nonReentrant whenNotPaused {\r
    IERC20Permit(address(stakingToken)).permit(msg.sender, address(this), amount, deadline, v, r, s);\r
    _stake(amount);\r
  }\r
\r
  /// @dev Internal stake implementation shared by stake and stakeWithPermit\r
  ///      Reverts with StakingClosed outside [programStart, programEnd) and AmountIsZero on zero amount.\r
  function _stake(uint256 amount) internal {\r
    if (block.timestamp < programStart || block.timestamp >= programEnd) revert StakingClosed();\r
    if (amount == 0) revert AmountIsZero();\r
\r
    // Determine snapshot rate based on the individual deposit amount\r
    uint256 newTotalLocked = totalLocked + amount;\r
    uint16 rate = currentTierBps(amount);\r
\r
    // Effects\r
    totalLocked = newTotalLocked;\r
    userPositions[msg.sender].push(Position({\r
      principal: uint128(amount),\r
      rateBps: rate,\r
      claimedWeeks: 0,\r
      startTime: uint64(block.timestamp)\r
    }));\r
\r
    // Interactions\r
    stakingToken.safeTransferFrom(msg.sender, address(this), amount);\r
\r
    emit PositionCreated(msg.sender, userPositions[msg.sender].length - 1, amount, rate, block.timestamp);\r
    emit Staked(msg.sender, amount);\r
  }\r
\r
  /// @notice Claim rewards for a specific position\r
  /// @dev Emits V2RewardClaimed; reverts with RewardsNotOpen if first week not completed,\r
  ///      NoRewardsDue if already fully claimed up to now.\r
  /// @param index The position index to claim for\r
  function claim(uint256 index) external nonReentrant whenNotPaused {\r
    Position storage p = _getPosition(msg.sender, index);\r
    if (p.principal == 0) revert NoPosition();\r
\r
    uint256 end = block.timestamp < programEnd ? block.timestamp : programEnd;\r
    if (end <= p.startTime) revert RewardsNotOpen();\r
\r
    uint256 weeksElapsed = (end - uint256(p.startTime)) / ONE_WEEK;\r
    if (weeksElapsed <= p.claimedWeeks) revert NoRewardsDue();\r
\r
    uint256 weeksToClaim = weeksElapsed - p.claimedWeeks;\r
    uint256 reward = (uint256(p.principal) * uint256(p.rateBps) * weeksToClaim) / 10_000;\r
\r
    // Effects then interactions\r
    p.claimedWeeks = uint16(weeksElapsed);\r
    stakingToken.safeTransfer(msg.sender, reward);\r
\r
    emit V2RewardClaimed(msg.sender, index, reward, weeksToClaim, weeksElapsed);\r
  }\r
\r
  /// @notice Withdraw principal for a specific position after program end\r
  /// @dev Emits PositionWithdrawn; reverts with StakeLocked before programEnd.\r
  /// @param index The position index to withdraw\r
  function withdraw(uint256 index) external nonReentrant whenNotPaused {\r
    Position storage p = _getPosition(msg.sender, index);\r
    uint256 principal = p.principal;\r
    if (principal == 0) revert NoPosition();\r
    if (block.timestamp < programEnd) revert StakeLocked();\r
\r
    // Effects\r
    totalLocked -= principal;\r
    // delete position by setting principal to 0; keep other fields for history\r
    p.principal = 0;\r
\r
    // Interactions\r
    stakingToken.safeTransfer(msg.sender, principal);\r
\r
    emit PositionWithdrawn(msg.sender, index, principal);\r
  }\r
\r
  // Legacy aggregate claim/withdraw and view\r
  /// @notice Legacy aggregate claim for all of the caller's positions\r
  /// @dev Emits legacy RewardClaimed with the aggregate amount and current program week.\r
  function claimRewards() external nonReentrant whenNotPaused {\r
    uint256 len = userPositions[msg.sender].length;\r
    if (len == 0) revert NoActiveStake();\r
\r
    uint256 aggregateReward;\r
    uint256 end = block.timestamp < programEnd ? block.timestamp : programEnd;\r
    uint256 maxWeekNumber;\r
\r
    for (uint256 i = 0; i < len; i++) {\r
      Position storage p = userPositions[msg.sender][i];\r
      if (p.principal == 0) continue;\r
      if (end <= p.startTime) continue;\r
      uint256 weeksElapsed = (end - uint256(p.startTime)) / ONE_WEEK;\r
      if (weeksElapsed > maxWeekNumber) maxWeekNumber = weeksElapsed;\r
      if (weeksElapsed <= p.claimedWeeks) continue;\r
      uint256 weeksToClaim = weeksElapsed - p.claimedWeeks;\r
      uint256 reward = (uint256(p.principal) * uint256(p.rateBps) * weeksToClaim) / 10_000;\r
      p.claimedWeeks = uint16(weeksElapsed);\r
      aggregateReward += reward;\r
    }\r
\r
    if (aggregateReward == 0) {\r
      bool hadAny = false;\r
      for (uint256 j = 0; j < len; j++) {\r
        Position storage p2 = userPositions[msg.sender][j];\r
        if (p2.principal == 0) continue;\r
        hadAny = true;\r
        if (end <= p2.startTime + ONE_WEEK) revert RewardsNotOpen();\r
      }\r
      if (hadAny) revert NoRewardsDue();\r
      revert NoActiveStake();\r
    }\r
\r
    stakingToken.safeTransfer(msg.sender, aggregateReward);\r
    emit RewardClaimed(msg.sender, aggregateReward, maxWeekNumber);\r
  }\r
\r
  /// @notice Legacy aggregate principal withdrawal across all positions after program end\r
  /// @dev Emits legacy StakeWithdrawn with the aggregate principal amount.\r
  function withdrawStake() external nonReentrant whenNotPaused {\r
    if (block.timestamp < programEnd) revert StakeLocked();\r
    uint256 len = userPositions[msg.sender].length;\r
    uint256 aggregatePrincipal;\r
    for (uint256 i = 0; i < len; i++) {\r
      Position storage p = userPositions[msg.sender][i];\r
      uint256 princ = p.principal;\r
      if (princ == 0) continue;\r
      aggregatePrincipal += princ;\r
      totalLocked -= princ;\r
      p.principal = 0;\r
    }\r
    if (aggregatePrincipal == 0) revert NoActiveStake();\r
\r
    stakingToken.safeTransfer(msg.sender, aggregatePrincipal);\r
    emit StakeWithdrawn(msg.sender, aggregatePrincipal);\r
  }\r
\r
  // ---------------------------------------------------------------------------\r
  // Funding Ops (owner)\r
  // ---------------------------------------------------------------------------\r
  /// @notice Owner funds the reward buffer used to pay claims\r
  /// @param amount The amount of reward tokens to transfer in\r
  function depositRewards(uint256 amount) external onlyOwner {\r
    if (amount == 0) revert AmountIsZero();\r
    stakingToken.safeTransferFrom(msg.sender, address(this), amount);\r
    emit RewardsDeposited(amount);\r
  }\r
\r
  /// @notice Owner withdraws any surplus reward tokens that are not backing principal\r
  function withdrawUnusedRewards() external onlyOwner {\r
    uint256 withdrawable = stakingToken.balanceOf(address(this)) - totalLocked;\r
    if (withdrawable == 0) revert NoUnusedRewards();\r
    stakingToken.safeTransfer(msg.sender, withdrawable);\r
    emit RewardsWithdrawn(withdrawable);\r
  }\r
\r
  // ---------------------------------------------------------------------------\r
  // Admin\r
  // ---------------------------------------------------------------------------\r
  /// @notice Pause state-changing user actions (stake/claim/withdraw)\r
  function pause() external onlyOwner { _pause(); }\r
  /// @notice Unpause state-changing user actions\r
  function unpause() external onlyOwner { _unpause(); }\r
\r
  // ---------------------------------------------------------------------------\r
  // Internals\r
  // ---------------------------------------------------------------------------\r
  /// @dev Bounds-checked accessor for a user's position\r
  function _getPosition(address user, uint256 index) internal view returns (Position storage) {\r
    require(index < userPositions[user].length, 'index out of bounds');\r
    return userPositions[user][index];\r
  }\r
}\r
\r
\r
"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": true,
      "runs": 1000000,
      "details": {
        "yul": true
      }
    },
    "evmVersion": "paris",
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    }
  }
}}