Contract Address Details

0xB42DD79C056d4b511c07c29d4c35403b47bE29B9

PrivateExitModule Last Balance Update: Block #18531330
Created by 0x5befa2–df5471 at 0x8b2ff8–b6fae5

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Contract name:
PrivateExitModule




Optimization enabled
true
Compiler version
v0.8.6+commit.11564f7e




Optimization runs
200
EVM Version
default




Verified at
2022-04-15 09:19:49.812943Z

Contract source code

// Sources flattened with hardhat v2.9.1 https://hardhat.org
// File @openzeppelin/contracts/token/ERC20/IERC20.sol@v4.5.0
// SPDX-License-Identifier: GPL-2.0-or-later
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @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);
/**
* @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);
}
// File @openzeppelin/contracts/utils/Address.sol@v4.5.0
// OpenZeppelin Contracts (last updated v4.5.0) (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
* ====
*
* [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://diligence.consensys.net/posts/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/v0.5.11/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 functionCall(target, data, "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");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(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) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(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) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason 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 {
// 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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File @openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol@v4.5.0
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
/**
* @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;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
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));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
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");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @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");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File @openzeppelin/contracts/security/ReentrancyGuard.sol@v4.5.0
// OpenZeppelin Contracts v4.4.1 (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() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// File contracts/interfaces/ILP.sol
pragma solidity ^0.8.6;
interface ILP {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function mint(address _to, uint256 _amount) external returns (bool);
function mintable() external view returns (bool);
function burnable() external view returns (bool);
function mintableStatusFrozen() external view returns (bool);
function burnableStatusFrozen() external view returns (bool);
function burn(
uint256 _amount,
address[] memory _tokens,
address[] memory _adapters,
address[] memory _pools
) external returns (bool);
}
// File contracts/interfaces/IDao.sol
pragma solidity ^0.8.6;
interface IDao {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function lp() external view returns (address);
function burnLp(
address _recipient,
uint256 _share,
address[] memory _tokens,
address[] memory _adapters,
address[] memory _pools
) external returns (bool);
function setLp(address _lp) external returns (bool);
function quorum() external view returns (uint8);
function executedTx(bytes32 _txHash) external view returns (bool);
function mintable() external view returns (bool);
function burnable() external view returns (bool);
function numberOfPermitted() external view returns (uint256);
function numberOfAdapters() external view returns (uint256);
function executePermitted(
address _target,
bytes calldata _data,
uint256 _value
) external returns (bool);
}
// File contracts/modules/PrivateExitModule.sol
pragma solidity ^0.8.6;
contract PrivateExitModule is ReentrancyGuard {
using SafeERC20 for IERC20;
using Address for address payable;
struct PrivateExitOffer {
bool isActive;
address recipient;
uint256 lpAmount;
uint256 ethAmount;
address[] tokenAddresses;
uint256[] tokenAmounts;
}
mapping(address => mapping(uint256 => PrivateExitOffer))
public privateExitOffers; // privateExitOffers[dao][offerId]
mapping(address => uint256) public numberOfPrivateOffers;
event PrivateExit(
address indexed recipient,
uint256 indexed lpAmount,
uint256 ethAmount,
address[] tokenAddresses,
uint256[] tokenAmounts
);
function createPrivateExitOffer(
address _recipient,
uint256 _lpAmount,
uint256 _ethAmount,
address[] memory _tokenAddresses,
uint256[] memory _tokenAmounts
) external returns (bool success) {
require(
_tokenAddresses.length == _tokenAmounts.length,
"PrivateExitModule: Invalid Tokens"
);
privateExitOffers[msg.sender][
numberOfPrivateOffers[msg.sender]
] = PrivateExitOffer({
isActive: true,
recipient: _recipient,
lpAmount: _lpAmount,
ethAmount: _ethAmount,
tokenAddresses: _tokenAddresses,
tokenAmounts: _tokenAmounts
});
numberOfPrivateOffers[msg.sender]++;
return true;
}
function disablePrivateExitOffer(uint256 _offerId)
external
returns (bool success)
{
require(
privateExitOffers[msg.sender][_offerId].isActive == true,
"PrivateExitModule: Already Disabled"
);
privateExitOffers[msg.sender][_offerId].isActive = false;
return true;
}
function privateExit(address _daoAddress, uint256 _offerId)
external
nonReentrant
returns (bool success)
{
PrivateExitOffer storage offer = privateExitOffers[_daoAddress][
_offerId
];
require(offer.isActive, "PrivateExitModule: Offer is Disabled");
offer.isActive = false;
require(
offer.recipient == msg.sender,
"PrivateExitModule: Invalid Recipient"
);
IDao dao = IDao(_daoAddress);
address lpAddress = dao.lp();
bool burnableStatus = ILP(lpAddress).burnable();
require(
burnableStatus || !ILP(lpAddress).burnableStatusFrozen(),
"PrivateExitModule: LP is not Burnable"
);
if (!burnableStatus) {
dao.executePermitted(
lpAddress,
abi.encodeWithSignature("changeBurnable(bool)", true),
0
);
}
IERC20(lpAddress).safeTransferFrom(
msg.sender,
address(this),
offer.lpAmount
);
IERC20(lpAddress).approve(lpAddress, offer.lpAmount);
address[] memory emptyAddressArray = new address[](0);
ILP(lpAddress).burn(
offer.lpAmount,
emptyAddressArray,
emptyAddressArray,
emptyAddressArray
);
for (uint256 i = 0; i < offer.tokenAddresses.length; i++) {
if (offer.tokenAmounts[i] > 0) {
dao.executePermitted(
offer.tokenAddresses[i],
abi.encodeWithSignature(
"transfer(address,uint256)",
msg.sender,
offer.tokenAmounts[i]
),
0
);
}
}
if (offer.ethAmount > 0) {
dao.executePermitted(msg.sender, "", offer.ethAmount);
}
if (!burnableStatus) {
dao.executePermitted(
lpAddress,
abi.encodeWithSignature("changeBurnable(bool)", false),
0
);
}
emit PrivateExit(
offer.recipient,
offer.lpAmount,
offer.ethAmount,
offer.tokenAddresses,
offer.tokenAmounts
);
return true;
}
function getOffers(address _dao)
external
view
returns (PrivateExitOffer[] memory)
{
PrivateExitOffer[] memory offers = new PrivateExitOffer[](
numberOfPrivateOffers[_dao]
);
for (uint256 i = 0; i < numberOfPrivateOffers[_dao]; i++) {
offers[i] = privateExitOffers[_dao][i];
}
return offers;
}
event Received(address indexed, uint256);
receive() external payable {
payable(msg.sender).sendValue(msg.value);
emit Received(msg.sender, msg.value);
}
}

Contract ABI

[{"type":"event","name":"PrivateExit","inputs":[{"type":"address","name":"recipient","internalType":"address","indexed":true},{"type":"uint256","name":"lpAmount","internalType":"uint256","indexed":true},{"type":"uint256","name":"ethAmount","internalType":"uint256","indexed":false},{"type":"address[]","name":"tokenAddresses","internalType":"address[]","indexed":false},{"type":"uint256[]","name":"tokenAmounts","internalType":"uint256[]","indexed":false}],"anonymous":false},{"type":"event","name":"Received","inputs":[{"type":"address","name":"","internalType":"address","indexed":true},{"type":"uint256","name":"","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"success","internalType":"bool"}],"name":"createPrivateExitOffer","inputs":[{"type":"address","name":"_recipient","internalType":"address"},{"type":"uint256","name":"_lpAmount","internalType":"uint256"},{"type":"uint256","name":"_ethAmount","internalType":"uint256"},{"type":"address[]","name":"_tokenAddresses","internalType":"address[]"},{"type":"uint256[]","name":"_tokenAmounts","internalType":"uint256[]"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"success","internalType":"bool"}],"name":"disablePrivateExitOffer","inputs":[{"type":"uint256","name":"_offerId","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"tuple[]","name":"","internalType":"struct PrivateExitModule.PrivateExitOffer[]","components":[{"type":"bool","name":"isActive","internalType":"bool"},{"type":"address","name":"recipient","internalType":"address"},{"type":"uint256","name":"lpAmount","internalType":"uint256"},{"type":"uint256","name":"ethAmount","internalType":"uint256"},{"type":"address[]","name":"tokenAddresses","internalType":"address[]"},{"type":"uint256[]","name":"tokenAmounts","internalType":"uint256[]"}]}],"name":"getOffers","inputs":[{"type":"address","name":"_dao","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"numberOfPrivateOffers","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"success","internalType":"bool"}],"name":"privateExit","inputs":[{"type":"address","name":"_daoAddress","internalType":"address"},{"type":"uint256","name":"_offerId","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"isActive","internalType":"bool"},{"type":"address","name":"recipient","internalType":"address"},{"type":"uint256","name":"lpAmount","internalType":"uint256"},{"type":"uint256","name":"ethAmount","internalType":"uint256"}],"name":"privateExitOffers","inputs":[{"type":"address","name":"","internalType":"address"},{"type":"uint256","name":"","internalType":"uint256"}]},{"type":"receive","stateMutability":"payable"}]
            

Contract Creation Code

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