BatteryCoinPresaleV3

{{
  "language": "Solidity",
  "sources": {
    "BatteryCoinPresaleV3-Mainnet.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

/**
 * @title BatteryCoinPresaleV3
 * @dev Enhanced presale contract for Ethereum with 70% token allocation
 * Starting at Round 2 ($0.75 per token) with owner-controlled round advancement
 */

import "@openzeppelin/contracts@4.9.6/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts@4.9.6/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts@4.9.6/access/Ownable.sol";
import "@openzeppelin/contracts@4.9.6/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts@4.9.6/security/Pausable.sol";
import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";
import "@openzeppelin/contracts@4.9.6/token/ERC20/extensions/IERC20Metadata.sol";

contract BatteryCoinPresaleV3 is Ownable, ReentrancyGuard, Pausable {
    using SafeERC20 for IERC20;

    // Token contracts
    IERC20 public immutable BATR;
    IERC20 public immutable USDT;
    IERC20 public immutable USDC;
    
    // Chainlink price feed for ETH/USD
    AggregatorV3Interface public immutable priceFeed;

    // Oracle validation constants
    uint256 public constant MAX_STALENESS = 3600; // 1 hour
    uint256 public constant MIN_ETH_PRICE = 100e8; // $100 minimum ETH price (8 decimals)

    // Current round number (0-20). Round 2 is active at start
    uint256 public currentRoundNumber = 2;

    // Presale round structure
    struct PresaleRound {
        uint256 roundNumber;     // Round number: 0-20
        uint256 roundPrice;      // In cents (75 = $0.75)
        uint256 totalTokenAmount;
        uint256 remainAmount;
        bool isActive;
    }

    // Mapping uses round numbers 0-20
    mapping(uint256 => PresaleRound) public presaleRounds;

    // Multi-owner system
    mapping(address => bool) public ownerList;
    mapping(address => bool) public coreOwnerList;

    // Delegated permissions: owners who can advance rounds
    mapping(address => bool) public canAdvanceRounds;

    // User tracking
    mapping(address => uint256) public userTotalPurchased;
    
    // Events
    event RoundAdvanced(uint256 indexed fromRound, uint256 indexed toRound, uint256 unsoldTokens);
    event TokensWithdrawn(address indexed to, uint256 amount);
    event FundsWithdrawn(address indexed token, address indexed to, uint256 amount);
    event TokensPurchased(address indexed buyer, uint256 amount, uint256 roundNumber, uint256 priceInCents);
    event CrossChainPurchase(address indexed buyer, uint256 amount, string targetChain);
    event OwnerAdded(address indexed newOwner);
    event OwnerRemoved(address indexed removedOwner);
    event CoreOwnerAdded(address indexed newCoreOwner);

    /**
     * @dev Constructor
     * @param _batr BATR token address
     * @param _usdt USDT token address
     * @param _usdc USDC token address
     * @param _priceFeed Chainlink ETH/USD price feed address
     */
    constructor(
        address _batr,
        address _usdt,
        address _usdc,
        address _priceFeed
    ) Ownable() {
        require(_batr != address(0), "Invalid BATR address");
        require(_usdt != address(0), "Invalid USDT address");
        require(_usdc != address(0), "Invalid USDC address");
        require(_priceFeed != address(0), "Invalid price feed address");

        BATR = IERC20(_batr);
        USDT = IERC20(_usdt);
        USDC = IERC20(_usdc);
        priceFeed = AggregatorV3Interface(_priceFeed);

        // Verify stablecoin decimals
        require(IERC20Metadata(address(USDC)).decimals() == 6, "USDC must have 6 decimals");
        require(IERC20Metadata(address(USDT)).decimals() == 6, "USDT must have 6 decimals");

        // Initialize owner system
        ownerList[msg.sender] = true;
        coreOwnerList[msg.sender] = true;

        // Initialize rounds
        initializeRounds();
    }

    // Modifiers
    modifier onlyOwners() {
        require(ownerList[msg.sender], "Caller is not an owner");
        _;
    }

    modifier onlyCoreOwners() {
        require(coreOwnerList[msg.sender], "Caller is not a core owner");
        _;
    }

    /**
     * @dev Initialize all presale rounds with 70% allocation
     * Total presale allocation: Rounds 0-20 with 70% of full amounts
     */
    function initializeRounds() internal {
        // Round prices in cents (0-20)
        uint16[21] memory roundPrices = [
            25,   // Round 0: $0.25
            50,   // Round 1: $0.50
            75,   // Round 2: $0.75 ← WE START HERE
            100,  // Round 3: $1.00
            200,  // Round 4: $2.00
            400,  // Round 5: $4.00
            600,  // Round 6: $6.00
            800,  // Round 7: $8.00
            1000, // Round 8: $10.00
            1200, // Round 9: $12.00
            1400, // Round 10: $14.00
            1600, // Round 11: $16.00
            1800, // Round 12: $18.00
            2000, // Round 13: $20.00
            2300, // Round 14: $23.00
            2600, // Round 15: $26.00
            2900, // Round 16: $29.00
            3200, // Round 17: $32.00
            3300, // Round 18: $33.00
            3400, // Round 19: $34.00
            3500  // Round 20: $35.00
        ];

        // Token amounts for 70% allocation
        uint32[21] memory tokenAmounts = [
            700000,   // Round 0: 70% of 1M
            1400000,  // Round 1: 70% of 2M
            2100000,  // Round 2: 70% of 3M
            2800000,  // Round 3: 70% of 4M
            3500000,  // Round 4: 70% of 5M
            4200000,  // Round 5: 70% of 6M
            4900000,  // Round 6: 70% of 7M
            5600000,  // Round 7: 70% of 8M
            6300000,  // Round 8: 70% of 9M
            7000000,  // Round 9: 70% of 10M
            7700000,  // Round 10: 70% of 11M
            8400000,  // Round 11: 70% of 12M
            9100000,  // Round 12: 70% of 13M
            9800000,  // Round 13: 70% of 14M
            10500000, // Round 14: 70% of 15M
            11200000, // Round 15: 70% of 16M
            11900000, // Round 16: 70% of 17M
            12600000, // Round 17: 70% of 18M
            13300000, // Round 18: 70% of 19M
            14000000, // Round 19: 70% of 20M
            21000000  // Round 20: 70% of 30M
        ];

        // Initialize with round numbers 0-20
        for (uint i = 0; i < 21; i++) {
            uint256 roundNum = i; // 0-20

            presaleRounds[roundNum] = PresaleRound({
                roundNumber: roundNum,
                roundPrice: roundPrices[i],
                totalTokenAmount: uint256(tokenAmounts[i]) * 10**18,
                remainAmount: uint256(tokenAmounts[i]) * 10**18,
                isActive: roundNum == 2 // Only Round 2 is active at start
            });
        }
    }

    /**
     * @dev Get current round data
     */
    function getCurrentRound() public view returns (PresaleRound memory) {
        return presaleRounds[currentRoundNumber];
    }

    /**
     * @dev Get total tokens allocated across all rounds
     */
    function getTotalPresaleAllocation() public view returns (uint256) {
        uint256 total = 0;
        for (uint i = 0; i <= 20; i++) {
            total += presaleRounds[i].totalTokenAmount;
        }
        return total;
    }

    /**
     * @dev Function to advance to a specific round (Core Owners or delegated Owners)
     * @param _targetRoundNumber The round number to advance to (must be higher than current)
     */
    function advanceToRound(uint256 _targetRoundNumber) external {
        require(coreOwnerList[msg.sender] || canAdvanceRounds[msg.sender], "Not authorized to advance round");
        require(_targetRoundNumber > currentRoundNumber, "Must advance forward");
        require(_targetRoundNumber <= 20, "Invalid round number");

        uint256 unsoldTokens = presaleRounds[currentRoundNumber].remainAmount;

        // Deactivate current round
        presaleRounds[currentRoundNumber].isActive = false;

        // Activate target round
        uint256 previousRound = currentRoundNumber;
        currentRoundNumber = _targetRoundNumber;
        presaleRounds[currentRoundNumber].isActive = true;

        emit RoundAdvanced(previousRound, currentRoundNumber, unsoldTokens);
    }

    /**
     * @dev Core Owner function to withdraw unsold tokens
     * @param _to Address to send tokens to
     * @param _amount Amount of tokens to withdraw
     */
    function withdrawUnsoldTokens(address _to, uint256 _amount) external onlyCoreOwners {
        require(_to != address(0), "Invalid recipient");
        require(BATR.balanceOf(address(this)) >= _amount, "Insufficient balance");
        
        BATR.safeTransfer(_to, _amount);
        emit TokensWithdrawn(_to, _amount);
    }

    /**
     * @dev Core Owner function to withdraw collected funds
     * @param _token Token address (address(0) for ETH)
     * @param _to Recipient address
     * @param _amount Amount to withdraw
     */
    function withdrawFunds(
        address _token,
        address _to,
        uint256 _amount
    ) external onlyCoreOwners {
        require(_to != address(0), "Invalid recipient");
        
        if (_token == address(0)) {
            // Withdraw ETH
            require(address(this).balance >= _amount, "Insufficient ETH");
            (bool success, ) = _to.call{value: _amount}("");
            require(success, "ETH transfer failed");
        } else {
            // Withdraw ERC20
            IERC20(_token).safeTransfer(_to, _amount);
        }
        
        emit FundsWithdrawn(_token, _to, _amount);
    }

    /**
     * @dev Purchase BATR tokens with USDC or USDT
     * @param _batrAmount Amount of BATR tokens to purchase
     * @param _token Payment token address (USDC or USDT)
     */
    function reserve(uint256 _batrAmount, address _token) public nonReentrant whenNotPaused {
        require(_token == address(USDC) || _token == address(USDT), "Invalid payment token");
        
        PresaleRound storage round = presaleRounds[currentRoundNumber];
        require(round.isActive, "Round not active");
        require(round.remainAmount >= _batrAmount, "Insufficient tokens in round");

        // Calculate price based on current round
        uint256 priceInCents = round.roundPrice; // e.g., 75 for Round 2
        
        // Calculate USD amount (payment tokens have 6 decimals)
        // Formula: (tokenAmount * priceInCents * 10^6) / (10^18 * 100)
        uint256 usdAmount = (_batrAmount * priceInCents * 10**6) / (10**18 * 100);

        // Process payment
        IERC20(_token).safeTransferFrom(msg.sender, address(this), usdAmount);

        // Transfer BATR tokens
        require(BATR.transfer(msg.sender, _batrAmount), "BATR transfer failed");
        
        // Update round state
        round.remainAmount -= _batrAmount;
        userTotalPurchased[msg.sender] += _batrAmount;

        emit TokensPurchased(msg.sender, _batrAmount, currentRoundNumber, priceInCents);
    }

    /**
     * @dev Purchase BATR tokens with ETH
     * @param _batrAmount Amount of BATR tokens to purchase
     */
    function reserveWithETH(uint256 _batrAmount) public payable nonReentrant whenNotPaused {
        PresaleRound storage round = presaleRounds[currentRoundNumber];
        require(round.isActive, "Round not active");
        require(round.remainAmount >= _batrAmount, "Insufficient tokens in round");

        // Calculate USD value
        uint256 priceInCents = round.roundPrice;
        // Calculate USD amount with 6 decimals for consistency
        uint256 usdAmount = (_batrAmount * priceInCents * 10**6) / (10**18 * 100);

        // Get validated ETH price from Chainlink
        uint256 ethPrice = getValidatedETHPrice();

        // Calculate required ETH (price has 8 decimals from Chainlink)
        // Convert USD amount to 8 decimals to match price feed
        uint256 requiredETH = (usdAmount * 10**20) / (ethPrice * 10**6);
        
        require(msg.value >= requiredETH, "Insufficient ETH sent");

        // Transfer BATR tokens
        require(BATR.transfer(msg.sender, _batrAmount), "BATR transfer failed");

        // Refund excess ETH
        if (msg.value > requiredETH) {
            (bool success, ) = msg.sender.call{value: msg.value - requiredETH}("");
            require(success, "ETH refund failed");
        }

        // Update round state
        round.remainAmount -= _batrAmount;
        userTotalPurchased[msg.sender] += _batrAmount;

        emit TokensPurchased(msg.sender, _batrAmount, currentRoundNumber, priceInCents);
    }

    /**
     * @dev Purchase with cross-chain option (recorded for backend fulfillment)
     * @param _batrAmount Amount of tokens to purchase
     * @param _paymentToken Payment token address
     * @param _targetChain Target chain for token delivery ("base" or "ethereum")
     */
    function reserveCrossChain(
        uint256 _batrAmount,
        address _paymentToken,
        string memory _targetChain
    ) external payable nonReentrant whenNotPaused {
        require(
            keccak256(bytes(_targetChain)) == keccak256(bytes("base")) ||
            keccak256(bytes(_targetChain)) == keccak256(bytes("ethereum")),
            "Invalid target chain"
        );

        // Process payment on this chain
        if (_paymentToken == address(0)) {
            // ETH payment
            reserveWithETH(_batrAmount);
        } else {
            // Token payment
            reserve(_batrAmount, _paymentToken);
        }

        // Emit event for backend processing
        emit CrossChainPurchase(msg.sender, _batrAmount, _targetChain);
    }

    /**
     * @dev Core owners can grant/revoke permission for an owner to advance rounds
     */
    function setAdvanceRoundPermission(address _owner, bool _canAdvance) external onlyCoreOwners {
        require(ownerList[_owner], "Must be an owner");
        canAdvanceRounds[_owner] = _canAdvance;
    }

    // Owner management functions
    function addOwner(address _newOwner) external onlyCoreOwners {
        require(_newOwner != address(0), "Invalid address");
        ownerList[_newOwner] = true;
        emit OwnerAdded(_newOwner);
    }

    function removeOwner(address _owner) external onlyCoreOwners {
        require(!coreOwnerList[_owner], "Cannot remove core owner");
        ownerList[_owner] = false;
        emit OwnerRemoved(_owner);
    }

    function addCoreOwner(address _newCoreOwner) external onlyCoreOwners {
        require(ownerList[_newCoreOwner], "Must be an owner first");
        coreOwnerList[_newCoreOwner] = true;
        emit CoreOwnerAdded(_newCoreOwner);
    }

    // Pause functions
    function pause() external onlyCoreOwners {
        _pause();
    }

    function unpause() external onlyCoreOwners {
        _unpause();
    }

    // View functions
    function isOwner(address _address) public view returns (bool) {
        return ownerList[_address];
    }

    function isCoreOwner(address _address) public view returns (bool) {
        return coreOwnerList[_address];
    }

    function getRoundInfo(uint256 _roundNumber) external view returns (PresaleRound memory) {
        require(_roundNumber <= 20, "Invalid round number");
        return presaleRounds[_roundNumber];
    }

    /**
     * @dev Get validated ETH price from Chainlink oracle
     */
    function getValidatedETHPrice() internal view returns (uint256) {
        (uint80 roundId, int256 price, , uint256 updatedAt, uint80 answeredInRound) = priceFeed.latestRoundData();

        // Validate oracle data freshness
        require(answeredInRound >= roundId, "Stale price round");
        require(updatedAt > 0, "Invalid timestamp");
        require(block.timestamp - updatedAt <= MAX_STALENESS, "Price data too old");

        // Validate price is reasonable (minimum only)
        require(price >= int256(MIN_ETH_PRICE), "ETH price below minimum");

        return uint256(price);
    }

    // Receive function to accept ETH
    receive() external payable {}
}"
    },
    "@openzeppelin/contracts@4.9.6/token/ERC20/extensions/IERC20Metadata.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}
"
    },
    "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface AggregatorV3Interface {
  function decimals() external view returns (uint8);

  function description() external view returns (string memory);

  function version() external view returns (uint256);

  function getRoundData(
    uint80 _roundId
  ) external view returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound);

  function latestRoundData()
    external
    view
    returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound);
}
"
    },
    "@openzeppelin/contracts@4.9.6/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@4.9.6/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@4.9.6/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@4.9.6/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@4.9.6/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@4.9.6/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@4.9.6/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@4.9.6/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;
    }
}
"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": false,
      "runs": 200
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    },
    "remappings": []
  }
}}