PaymentPoolETH

{{
  "language": "Solidity",
  "sources": {
    "contracts/PaymentGateway.sol": {
      "content": "// SPDX-License-Identifier: MIT\r
pragma solidity ^0.8.20;\r
\r
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";\r
\r
/*\r
ETH PAYMENT GATEWAY\r
Secure fund pooling, owner control, backup recovery\r
Email hashing for cheaper storage + privacy\r
Enhanced with ReentrancyGuard for security\r
*/\r
\r
contract PaymentPoolETH is ReentrancyGuard {\r
    \r
    address public owner;\r
    address public backupOwner;\r
\r
    struct Payment {\r
        uint256 amount;\r
        uint256 timestamp;\r
        address wallet;\r
    }\r
\r
    mapping(bytes32 => Payment[]) private payments;\r
\r
    event PaymentReceived(bytes32 indexed emailHash, address indexed wallet, uint256 amount, uint256 timestamp);\r
    event OwnerWithdraw(address indexed to, uint256 amount);\r
    event OwnershipTransferred(address indexed oldOwner, address indexed newOwner);\r
    event EmergencyOwnerRecovered(address indexed recoveredBy);\r
    event EmergencyWithdrawDone(address indexed to, uint256 amount);\r
    event ETHReceivedDirect(address indexed from, uint256 amount, uint256 timestamp);\r
\r
    modifier onlyOwner() {\r
        require(msg.sender == owner, "Not authorized");\r
        _;\r
    }\r
\r
    modifier onlyBackupOwner() {\r
        require(msg.sender == backupOwner, "Not authorized");\r
        _;\r
    }\r
\r
    constructor(address _backupOwner) {\r
        require(_backupOwner != address(0), "Invalid backup owner");\r
        owner = msg.sender;\r
        backupOwner = _backupOwner;\r
    }\r
\r
    // Deposit ETH with email tracking\r
    function deposit(string memory email) external payable {\r
        require(msg.value > 0, "Payment must be > 0");\r
        bytes32 emailHash = keccak256(abi.encodePacked(email));\r
        payments[emailHash].push(Payment({\r
            amount: msg.value,\r
            timestamp: block.timestamp,\r
            wallet: msg.sender\r
        }));\r
        emit PaymentReceived(emailHash, msg.sender, msg.value, block.timestamp);\r
    }\r
\r
    // Owner withdraws pooled funds for trading\r
    function withdraw(uint256 amount) external onlyOwner nonReentrant {\r
        require(address(this).balance >= amount, "Insufficient balance");\r
        (bool success, ) = payable(owner).call{value: amount}("");\r
        require(success, "Transfer failed");\r
        emit OwnerWithdraw(owner, amount);\r
    }\r
\r
    // Standard ownership handover\r
    function transferOwnership(address newOwner) external onlyOwner {\r
        require(newOwner != address(0), "Invalid owner");\r
        emit OwnershipTransferred(owner, newOwner);\r
        owner = newOwner;\r
    }\r
\r
    // Backup admin takes over if owner loses wallet\r
    function emergencyRecoverOwnership() external onlyBackupOwner {\r
        emit EmergencyOwnerRecovered(msg.sender);\r
        owner = backupOwner;\r
    }\r
\r
    // Backup admin empties pool in critical situations\r
    function emergencyWithdraw() external onlyBackupOwner nonReentrant {\r
        uint256 total = address(this).balance;\r
        require(total > 0, "Nothing to withdraw");\r
        (bool success, ) = payable(backupOwner).call{value: total}("");\r
        require(success, "Emergency transfer failed");\r
        emit EmergencyWithdrawDone(backupOwner, total);\r
    }\r
\r
    // Transparency for depositors\r
    function getPayments(string memory email) external view returns(Payment[] memory) {\r
        bytes32 emailHash = keccak256(abi.encodePacked(email));\r
        return payments[emailHash];\r
    }\r
\r
    // View contract pool balance\r
    function getBalance() external view returns(uint256) {\r
        return address(this).balance;\r
    }\r
\r
    // Accept plain ETH transfers\r
    receive() external payable {\r
        emit ETHReceivedDirect(msg.sender, msg.value, block.timestamp);\r
    }\r
}\r
"
    },
    "@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;
    }
}
"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": false,
      "runs": 200
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    },
    "remappings": []
  }
}}