NanoProcessor

{{
  "language": "Solidity",
  "sources": {
    "contracts/NanoProcessor.sol": {
      "content": "// SPDX-License-Identifier: MIT\r
pragma solidity ^0.8.20;\r
\r
import "@openzeppelin/contracts/access/Ownable.sol";\r
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";\r
\r
// Contract for NanoProcessor — Handles tipping with 2% fee\r
contract NanoProcessor is Ownable, ReentrancyGuard {\r
\r
    uint256 public feeBasisPoints = 200; // 2% fee\r
    address payable public platformWallet; // Platform wallet address (receives 2% fees)\r
    address payable public charityWallet;  // Optional charity wallet\r
    uint256 public charityShareBps = 0;    // Share of 2% to charity\r
\r
    // Events for logging actions\r
    event Tipped(address indexed sender, address indexed creator, uint256 gross, uint256 net, uint256 fee);\r
    event FeeParamsUpdated(uint256 feeBps, address charity, uint256 charityBps);\r
    event PlatformWalletUpdated(address indexed oldWallet, address indexed newWallet);\r
\r
    // Constructor: Set platform wallet and initial owner\r
    constructor(address payable _platformWallet) Ownable(msg.sender) {\r
        require(_platformWallet != address(0), "platform=zero");\r
        platformWallet = _platformWallet;\r
        transferOwnership(msg.sender); // Set the initial owner to the contract deployer\r
    }\r
\r
    // Tip function: Allows users to tip creators with 2% platform fee applied\r
    function tip(address payable creator) external payable nonReentrant {\r
        require(msg.value > 0, "no value");\r
        require(creator != address(0), "creator=zero");\r
\r
        // Apply 2% platform fee\r
        uint256 fee = (msg.value * feeBasisPoints) / 10_000;\r
        uint256 net = msg.value - fee;\r
\r
        // Optionally split fee for charity\r
        uint256 charityCut = 0;\r
        if (charityWallet != address(0) && charityShareBps > 0) {\r
            charityCut = (fee * charityShareBps) / 10_000;\r
        }\r
\r
        // Forward the fee\r
        if (fee > 0) {\r
            if (charityCut > 0) {\r
                (bool okC, ) = charityWallet.call{value: charityCut}("");\r
                require(okC, "charity fail");\r
            }\r
            (bool okF, ) = platformWallet.call{value: fee - charityCut}("");\r
            require(okF, "fee fail");\r
        }\r
\r
        // Transfer the net amount to the creator\r
        (bool okCreator, ) = creator.call{value: net}("");\r
        require(okCreator, "creator fail");\r
\r
        emit Tipped(msg.sender, creator, msg.value, net, fee);\r
    }\r
\r
    // =============================== Admin Functions ===============================\r
\r
    // Set platform wallet address (where 2% platform fee goes)\r
    function setPlatformWallet(address payable newWallet) external onlyOwner {\r
        require(newWallet != address(0), "zero wallet");\r
        address old = platformWallet;\r
        platformWallet = newWallet;\r
        emit PlatformWalletUpdated(old, newWallet);\r
    }\r
\r
    // Set the fee parameters (platform fee and charity split)\r
    function setFeeParams(uint256 newFeeBps, address payable newCharity, uint256 newCharityBps)\r
        external\r
        onlyOwner\r
    {\r
        require(newFeeBps <= 1000, "max 10%");\r
        require(newCharityBps <= 10_000, "charityBps>100%");\r
        feeBasisPoints = newFeeBps;\r
        charityWallet = newCharity;\r
        charityShareBps = newCharityBps;\r
        emit FeeParamsUpdated(newFeeBps, newCharity, newCharityBps);\r
    }\r
\r
    // Receive function to allow direct ETH transfers\r
    receive() external payable {\r
        require(msg.value > 0, "no ETH");\r
    }\r
\r
    // =============================== Internal Helper Functions ============================\r
\r
    // Helper function to calculate fee and net amount\r
   function _applyInFee(uint256 gross) internal view returns (uint256 fee, uint256 net) {\r
        fee = (gross * feeBasisPoints) / 10_000;\r
        net = gross - fee;\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;
    }
}
"
    },
    "@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;
    }
}
"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": false,
      "runs": 200
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    },
    "remappings": []
  }
}}