DjPresale

{{
  "language": "Solidity",
  "sources": {
    "presale.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
/* ----------------------------- Chainlink Feed ----------------------------- */
interface AggregatorV3Interface {
  function decimals() external view returns (uint8);
  function latestRoundData() external view returns (
    uint80 roundId,
    int256 answer,
    uint256 startedAt,
    uint256 updatedAt,
    uint80 answeredInRound
  );
}
/* -------------------------------- Ownable -------------------------------- */
abstract contract Ownable {
  event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
  address public owner;
  modifier onlyOwner() { require(msg.sender == owner, "NOT_OWNER"); _; }
  constructor() { owner = msg.sender; emit OwnershipTransferred(address(0), msg.sender); }
  function transferOwnership(address newOwner) external onlyOwner {
    require(newOwner != address(0), "ZERO_ADDRESS");
    emit OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }
}
/* --------------------------- Reentrancy Guard ---------------------------- */
abstract contract ReentrancyGuard {
  uint256 private _status = 1;
  modifier nonReentrant() {
    require(_status == 1, "REENTRANT");
    _status = 2;
    _;
    _status = 1;
  }
}
/* ================================ Contract =============================== */
contract DjPresale is Ownable, ReentrancyGuard {
  using SafeERC20 for IERC20;
  // Config
  bool public isActive;
  IERC20 public saleToken;
  uint8 public saleTokenDecimals;
  uint256 public totalTokens;
  uint256 public soldTokens;
  uint256 public priceUsdPerToken;          // 6 decimals (e.g., $0.25 => 250000)
  address public usdt;                      // 6 decimals
  address public usdc;                      // 6 decimals
  AggregatorV3Interface public ethUsdFeed;  // Chainlink ETH/USD
  // Funds beneficiary
  address public beneficiary;
  // Price freshness
  uint256 public priceStaleAfter = 1 hours; // configurable
  // State
  mapping(address => uint256) public purchased;
  // Events
  event Started();
  event Ended();
  event PriceUpdated(uint256 priceUsdPerToken);
  event TokenSet(address token, uint8 decimals);
  event TokensDeposited(uint256 amount);
  event PurchasedWithETH(address indexed buyer, uint256 ethInWei, uint256 usdValue6, uint256 tokensOut);
  event PurchasedWithToken(address indexed buyer, address indexed currency, uint256 currencyAmount, uint256 tokensOut);
  event Claimed(address indexed user, uint256 amount);
  event BeneficiaryUpdated(address beneficiary);
  event StableAddrsUpdated(address usdt, address usdc);
  event PriceStaleAfterUpdated(uint256 secondsValue);
  constructor(
    address _saleToken,
    uint8 _saleTokenDecimals,
    uint256 _priceUsdPerToken6,
    address _usdt,
    address _usdc,
    address _ethUsdFeed,
    address _beneficiary
  ) {
    require(_saleToken != address(0), "BAD_SALE_TOKEN");
    require(_ethUsdFeed != address(0), "BAD_FEED");
    require(_beneficiary != address(0), "BAD_BENEFICIARY");
    require(_usdt != address(0) && _usdc != address(0), "BAD_STABLES");
    require(_saleTokenDecimals <= 24, "DECIMALS_TOO_LARGE");
    require(_priceUsdPerToken6 > 0, "BAD_PRICE");
    saleToken = IERC20(_saleToken);
    saleTokenDecimals = _saleTokenDecimals;
    priceUsdPerToken = _priceUsdPerToken6;
    usdt = _usdt;
    usdc = _usdc;
    ethUsdFeed = AggregatorV3Interface(_ethUsdFeed);
    beneficiary = _beneficiary;
    emit BeneficiaryUpdated(_beneficiary);
    emit StableAddrsUpdated(_usdt, _usdc);
    emit TokenSet(_saleToken, _saleTokenDecimals);
    emit PriceUpdated(_priceUsdPerToken6);
  }
  /* ------------------------------- Admin -------------------------------- */
  function setToken(address _token, uint8 _decimals) external onlyOwner {
    require(_token != address(0), "ZERO_TOKEN");
    require(_decimals <= 24, "DECIMALS_TOO_LARGE");
    saleToken = IERC20(_token);
    saleTokenDecimals = _decimals;
    emit TokenSet(_token, _decimals);
  }
  function setPriceUsdPerToken(uint256 _priceUsdPerToken6) external onlyOwner {
    require(_priceUsdPerToken6 > 0, "BAD_PRICE");
    priceUsdPerToken = _priceUsdPerToken6;
    emit PriceUpdated(_priceUsdPerToken6);
  }
  function setStableAddrs(address _usdt, address _usdc) external onlyOwner {
    require(_usdt != address(0) && _usdc != address(0), "ZERO_STABLE");
    usdt = _usdt;
    usdc = _usdc;
    emit StableAddrsUpdated(_usdt, _usdc);
  }
  function setEthUsdFeed(address _feed) external onlyOwner {
    require(_feed != address(0), "ZERO_FEED");
    ethUsdFeed = AggregatorV3Interface(_feed);
  }
  function setBeneficiary(address _beneficiary) external onlyOwner {
    require(_beneficiary != address(0), "ZERO_BENEFICIARY");
    beneficiary = _beneficiary;
    emit BeneficiaryUpdated(_beneficiary);
  }
  function setPriceStaleAfter(uint256 secondsValue) external onlyOwner {
    require(secondsValue >= 60, "STALE_TOO_SHORT");
    priceStaleAfter = secondsValue;
    emit PriceStaleAfterUpdated(secondsValue);
  }
  function depositTokens(uint256 amount) external onlyOwner {
    require(amount > 0, "ZERO_AMOUNT");
    saleToken.safeTransferFrom(msg.sender, address(this), amount);
    totalTokens += amount;
    emit TokensDeposited(amount);
  }
  function startPresale() external onlyOwner {
    require(!isActive, "ALREADY_ACTIVE");
    isActive = true;
    emit Started();
  }
  function endPresale() external onlyOwner {
    require(isActive, "NOT_ACTIVE");
    isActive = false;
    emit Ended();
  }
  /* -------------------------------- Views ------------------------------- */
  function claimableOf(address user) external view returns (uint256) {
    return purchased[user];
  }
  function getEthUsdPrice6() public view returns (uint256) {
    (uint80 roundId, int256 price, , uint256 updatedAt, uint80 answeredInRound) = ethUsdFeed.latestRoundData();
    require(price > 0, "BAD_PRICE");
    require(answeredInRound >= roundId, "INCOMPLETE_ROUND");
    require(updatedAt + priceStaleAfter >= block.timestamp, "STALE_PRICE");
    uint8 feedDecimals = ethUsdFeed.decimals();
    // scale to 6 decimals
    if (feedDecimals == 6) {
      return uint256(price);
    } else if (feedDecimals > 6) {
      return uint256(price) / (10 ** (feedDecimals - 6));
    } else {
      return uint256(price) * (10 ** (6 - feedDecimals));
    }
  }
  /* ------------------------------- Buying ------------------------------- */
  function buyWithETH() external payable nonReentrant {
    require(isActive, "PRESALE_CLOSED");
    require(msg.value > 0, "ZERO_ETH");
    uint256 ethUsd6 = getEthUsdPrice6();
    uint256 usdValue6 = (msg.value * ethUsd6) / 1e18;
    uint256 out = _allocateTokens(msg.sender, usdValue6);
    // forward ETH instantly to beneficiary
    (bool ok, ) = payable(beneficiary).call{ value: msg.value }("");
    require(ok, "ETH_FORWARD_FAILED");
    emit PurchasedWithETH(msg.sender, msg.value, usdValue6, out);
  }
  function buyWithToken(address currency, uint256 amount) external nonReentrant {
    require(isActive, "PRESALE_CLOSED");
    require(currency == usdt || currency == usdc, "UNSUPPORTED_TOKEN");
    require(amount > 0, "ZERO_AMOUNT");
    // pull funds and send straight to beneficiary
    IERC20(currency).safeTransferFrom(msg.sender, beneficiary, amount);
    // amount is USD (6 decimals) for USDT/USDC
    uint256 out = _allocateTokens(msg.sender, amount);
    emit PurchasedWithToken(msg.sender, currency, amount, out);
  }
  function _allocateTokens(address buyer, uint256 usdValue6) internal returns (uint256 out) {
    require(priceUsdPerToken > 0, "PRICE_NOT_SET");
    uint256 tokens6 = (usdValue6 * 1e6) / priceUsdPerToken;
    uint256 tokens = _scale6ToTokenDecimals(tokens6);
    require(tokens > 0, "INSUFFICIENT_PAYMENT");
    require(soldTokens + tokens <= totalTokens, "PRESALE_SOLD_OUT");
    purchased[buyer] += tokens;
    soldTokens += tokens;
    return tokens;
  }
  function _scale6ToTokenDecimals(uint256 amount6) internal view returns (uint256) {
    if (saleTokenDecimals == 6) return amount6;
    if (saleTokenDecimals > 6) return amount6 * (10 ** (saleTokenDecimals - 6));
    // If decimals < 6 we lose precision by integer division (acceptable for presale math)
    return amount6 / (10 ** (6 - saleTokenDecimals));
  }
  /* ------------------------------- Claiming ----------------------------- */
  function claim() external nonReentrant {
    require(!isActive, "PRESALE_ACTIVE");
    uint256 amount = purchased[msg.sender];
    require(amount > 0, "NOTHING_TO_CLAIM");
    require(saleToken.balanceOf(address(this)) >= amount, "INSUFFICIENT_TOKENS");
    purchased[msg.sender] = 0;
    SafeERC20.safeTransfer(saleToken, msg.sender, amount);
    emit Claimed(msg.sender, amount);
  }
  /* ------------------- Admin withdrawals (safer variants) ---------------- */
  /// @notice Withdraw non-sale tokens held by the contract (e.g., wrong transfers)
  function withdrawToken(address token, address to, uint256 amount) external onlyOwner {
    require(to != address(0), "ZERO_TO");
    require(token != address(saleToken), "USE_WITHDRAW_UNSOLD");
    SafeERC20.safeTransfer(IERC20(token), to, amount);
  }
  /// @notice Withdraw ETH held by the contract (should usually be 0 due to forwarding)
  function withdrawETH(address payable to, uint256 amount) external onlyOwner {
    require(to != address(0), "ZERO_TO");
    if (amount == 0) amount = address(this).balance;
    (bool ok,) = to.call{ value: amount }(new bytes(0));
    require(ok, "ETH_WITHDRAW_FAILED");
  }
  /// @notice Withdraw only unsold sale tokens after presale ends
  function withdrawUnsold(address to) external onlyOwner {
    require(!isActive, "PRESALE_ACTIVE");
    require(to != address(0), "ZERO_TO");
    uint256 bal = saleToken.balanceOf(address(this));
    uint256 lockedForClaims = soldTokens; // all purchased amounts are owed to buyers
    require(bal > lockedForClaims, "NO_UNSOLD");
    uint256 unsold = bal - lockedForClaims;
    saleToken.safeTransfer(to, unsold);
  }
  /* ------------------------- Fallback / Receive Policy ------------------- */
  // Reject accidental plain ETH transfers so users call the proper function.
  receive() external payable {
    revert("USE_buyWithETH");
  }
}"
    },
    "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";
import {IERC1363} from "../../../interfaces/IERC1363.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC-20 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 {
    /**
     * @dev An operation with an ERC-20 token failed.
     */
    error SafeERC20FailedOperation(address token);

    /**
     * @dev Indicates a failed `decreaseAllowance` request.
     */
    error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease);

    /**
     * @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.encodeCall(token.transfer, (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.encodeCall(token.transferFrom, (from, to, value)));
    }

    /**
     * @dev Variant of {safeTransfer} that returns a bool instead of reverting if the operation is not successful.
     */
    function trySafeTransfer(IERC20 token, address to, uint256 value) internal returns (bool) {
        return _callOptionalReturnBool(token, abi.encodeCall(token.transfer, (to, value)));
    }

    /**
     * @dev Variant of {safeTransferFrom} that returns a bool instead of reverting if the operation is not successful.
     */
    function trySafeTransferFrom(IERC20 token, address from, address to, uint256 value) internal returns (bool) {
        return _callOptionalReturnBool(token, abi.encodeCall(token.transferFrom, (from, to, 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.
     *
     * IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
     * smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
     * this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
     * that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        forceApprove(token, spender, oldAllowance + value);
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no
     * value, non-reverting calls are assumed to be successful.
     *
     * IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
     * smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
     * this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
     * that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal {
        unchecked {
            uint256 currentAllowance = token.allowance(address(this), spender);
            if (currentAllowance < requestedDecrease) {
                revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease);
            }
            forceApprove(token, spender, currentAllowance - requestedDecrease);
        }
    }

    /**
     * @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.
     *
     * NOTE: If the token implements ERC-7674, this function will not modify any temporary allowance. This function
     * only sets the "standard" allowance. Any temporary allowance will remain active, in addition to the value being
     * set here.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value));

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

    /**
     * @dev Performs an {ERC1363} transferAndCall, with a fallback to the simple {ERC20} transfer if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            safeTransfer(token, to, value);
        } else if (!token.transferAndCall(to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} transferFromAndCall, with a fallback to the simple {ERC20} transferFrom if the target
     * has no code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferFromAndCallRelaxed(
        IERC1363 token,
        address from,
        address to,
        uint256 value,
        bytes memory data
    ) internal {
        if (to.code.length == 0) {
            safeTransferFrom(token, from, to, value);
        } else if (!token.transferFromAndCall(from, to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} approveAndCall, with a fallback to the simple {ERC20} approve if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * NOTE: When the recipient address (`to`) has no code (i.e. is an EOA), this function behaves as {forceApprove}.
     * Opposedly, when the recipient address (`to`) has code, this function only attempts to call {ERC1363-approveAndCall}
     * once without retrying, and relies on the returned value to be true.
     *
     * Reverts if the returned value is other than `true`.
     */
    function approveAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            forceApprove(token, to, value);
        } else if (!token.approveAndCall(to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @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 {_callOptionalReturnBool} that reverts if call fails to meet the requirements.
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        uint256 returnSize;
        uint256 returnValue;
        assembly ("memory-safe") {
            let success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
            // bubble errors
            if iszero(success) {
                let ptr := mload(0x40)
                returndatacopy(ptr, 0, returndatasize())
                revert(ptr, returndatasize())
            }
            returnSize := returndatasize()
            returnValue := mload(0)
        }

        if (returnSize == 0 ? address(token).code.length == 0 : returnValue != 1) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @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 silently catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        bool success;
        uint256 returnSize;
        uint256 returnValue;
        assembly ("memory-safe") {
            success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
            returnSize := returndatasize()
            returnValue := mload(0)
        }
        return success && (returnSize == 0 ? address(token).code.length > 0 : returnValue == 1);
    }
}
"
    },
    "@openzeppelin/contracts/token/ERC20/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/IERC20.sol)

pragma solidity >=0.4.16;

/**
 * @dev Interface of the ERC-20 standard as defined in the ERC.
 */
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 value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

    /**
     * @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` 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 value) external returns (bool);
}
"
    },
    "@openzeppelin/contracts/interfaces/IERC1363.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC1363.sol)

pragma solidity >=0.6.2;

import {IERC20} from "./IERC20.sol";
import {IERC165} from "./IERC165.sol";

/**
 * @title IERC1363
 * @dev Interface of the ERC-1363 standard as defined in the https://eips.ethereum.org/EIPS/eip-1363[ERC-1363].
 *
 * Defines an extension interface for ERC-20 tokens that supports executing code on a recipient contract
 * after `transfer` or `transferFrom`, or code on a spender contract after `approve`, in a single transaction.
 */
interface IERC1363 is IERC20, IERC165 {
    /*
     * Note: the ERC-165 identifier for this interface is 0xb0202a11.
     * 0xb0202a11 ===
     *   bytes4(keccak256('transferAndCall(address,uint256)')) ^
     *   bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
     */

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @param data Additional data with no specified format, sent in call to `spender`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value, bytes calldata data) external returns (bool);
}
"
    },
    "@openzeppelin/contracts/interfaces/IERC165.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC165.sol)

pragma solidity >=0.4.16;

import {IERC165} from "../utils/introspection/IERC165.sol";
"
    },
    "@openzeppelin/contracts/interfaces/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC20.sol)

pragma solidity >=0.4.16;

import {IERC20} from "../token/ERC20/IERC20.sol";
"
    },
    "@openzeppelin/contracts/utils/introspection/IERC165.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (utils/introspection/IERC165.sol)

pragma solidity >=0.4.16;

/**
 * @dev Interface of the ERC-165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[ERC].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[ERC section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": false,
      "runs": 200
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    },
    "remappings": []
  }
}}