SimplePonstrHook

{{
  "language": "Solidity",
  "sources": {
    "@openzeppelin/contracts/access/Ownable.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../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.
 *
 * The initial owner is set to the address provided by the deployer. 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;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

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

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @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 {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @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 {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _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/utils/Context.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @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;
    }
}
"
    },
    "@openzeppelin/contracts/utils/ReentrancyGuard.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/ReentrancyGuard.sol)

pragma solidity ^0.8.20;

/**
 * @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 EIP-1153 (transient storage) is available on the chain you're deploying at,
 * consider using {ReentrancyGuardTransient} instead.
 *
 * 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;

    /**
     * @dev Unauthorized reentrant call.
     */
    error ReentrancyGuardReentrantCall();

    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
        if (_status == ENTERED) {
            revert ReentrancyGuardReentrantCall();
        }

        // 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;
    }
}
"
    },
    "contracts/hooks/IPonstrHook.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

/**
 * @title IPonstrHook
 * @dev Interface for PonStrategy token hooks
 */
interface IPonstrHook {
    /**
     * @dev Called when a transfer occurs
     * @param from The address tokens are transferred from
     * @param to The address tokens are transferred to
     * @param amount The amount of tokens transferred
     */
    function onTransfer(address from, address to, uint256 amount) external;
    
    /**
     * @dev Called when a transferFrom occurs
     * @param from The address tokens are transferred from
     * @param to The address tokens are transferred to
     * @param amount The amount of tokens transferred
     */
    function onTransferFrom(address from, address to, uint256 amount) external;
}
"
    },
    "contracts/hooks/SimplePonstrHook.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import {IPonstrHook} from "./IPonstrHook.sol";

interface IPonstrToken {
    function addFees() external payable;
    function owner() external view returns (address);
    function currentFees() external view returns (uint256);
}

/**
 * @title SimplePonstrHook
 * @dev Simple hook contract for PonStrategy token that collects ETH fees
 * This is a simplified version for testing without Uniswap integration
 */
contract SimplePonstrHook is IPonstrHook, Ownable, ReentrancyGuard {
    // Core addresses
    address public immutable ponstrToken;
    
    // Fee configuration
    uint256 public feeBps = 1000; // 10% fee
    uint256 public protocolFeeShareBps = 9700; // 97% to protocol
    
    // DEX configuration
    address public liquidityPair;
    mapping(address => bool) public isExcludedFromFee;
    
    // Events
    event FeeCollected(address indexed from, address indexed to, uint256 tokenAmount, uint256 ethAmount);
    event FeesAdded(uint256 amount, uint256 totalFees);
    event HookConfigured(address indexed ponstrToken, address indexed pair);
    
    // Errors
    error Unauthorized();
    error InvalidAddress();
    error FeeTooHigh();
    
    constructor(
        address ponstrToken_,
        address owner_
    ) Ownable(owner_) {
        if (ponstrToken_ == address(0)) revert InvalidAddress();
        
        ponstrToken = ponstrToken_;
        
        emit HookConfigured(ponstrToken_, address(0));
    }
    
    /**
     * @dev Called by PonStrategy token on transfer
     */
    function onTransfer(address from, address to, uint256 amount) external override {
        if (msg.sender != ponstrToken) revert Unauthorized();
        _processTransfer(from, to, amount);
    }
    
    /**
     * @dev Called by PonStrategy token on transferFrom
     */
    function onTransferFrom(address from, address to, uint256 amount) external override {
        if (msg.sender != ponstrToken) revert Unauthorized();
        _processTransfer(from, to, amount);
    }
    
    /**
     * @dev Internal function to process transfer and collect fees
     */
    function _processTransfer(address from, address to, uint256 amount) internal nonReentrant {
        // Skip if no fee or excluded addresses
        if (feeBps == 0 || isExcludedFromFee[from] || isExcludedFromFee[to]) {
            return;
        }
        
        // Only collect fees on DEX trades
        bool isDexTrade = (from == liquidityPair || to == liquidityPair) && liquidityPair != address(0);
        if (!isDexTrade) {
            return;
        }
        
        // Calculate fee
        uint256 feeAmount = (amount * feeBps) / 10000;
        if (feeAmount == 0) return;
        
        // Calculate protocol share (97%)
        uint256 protocolFee = (feeAmount * protocolFeeShareBps) / 10000;
        
        // For testing: simulate fee collection by sending ETH directly
        // In production, this would be handled by the DEX or external mechanism
        if (protocolFee > 0) {
            // Simulate ETH fee (0.001 ETH per 1000 tokens)
            uint256 ethFee = (protocolFee * 1e15) / 1e18; // 0.001 ETH per 1000 tokens
            if (ethFee > 0 && address(this).balance >= ethFee) {
                // Send ETH to PonStrategy token
                IPonstrToken(ponstrToken).addFees{value: ethFee}();
                emit FeesAdded(ethFee, IPonstrToken(ponstrToken).currentFees());
            }
        }
        
        emit FeeCollected(from, to, feeAmount, protocolFee);
    }
    
    /**
     * @dev Set liquidity pair address
     */
    function setLiquidityPair(address pair_) external onlyOwner {
        liquidityPair = pair_;
    }
    
    /**
     * @dev Set fee configuration
     */
    function setFees(uint256 feeBps_, uint256 protocolShareBps_) external onlyOwner {
        if (feeBps_ > 2000) revert FeeTooHigh(); // Max 20%
        if (protocolShareBps_ > 10000) revert FeeTooHigh(); // Max 100%
        
        feeBps = feeBps_;
        protocolFeeShareBps = protocolShareBps_;
    }
    
    /**
     * @dev Set excluded addresses
     */
    function setExcluded(address account, bool excluded) external onlyOwner {
        isExcludedFromFee[account] = excluded;
    }
    
    /**
     * @dev Add ETH fees to the main token contract
     */
    function addFees() external payable {
        if (msg.sender != owner()) revert Unauthorized();
        IPonstrToken(ponstrToken).addFees{value: msg.value}();
    }
    
    /**
     * @dev Emergency withdraw ETH
     */
    function emergencyWithdrawETH(address payable to, uint256 amount) external onlyOwner {
        (bool success,) = to.call{value: amount}("");
        require(success, "ETH transfer failed");
    }
    
    /**
     * @dev Emergency withdraw tokens
     */
    function emergencyWithdrawToken(address token, address to, uint256 amount) external onlyOwner {
        // Use low-level call to avoid interface issues
        (bool success,) = token.call(abi.encodeWithSignature("transfer(address,uint256)", to, amount));
        require(success, "Token transfer failed");
    }
    
    /**
     * @dev Receive ETH
     */
    receive() external payable {}
}
"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": true,
      "runs": 200
    },
    "viaIR": false,
    "evmVersion": "paris",
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    }
  }
}}