Contract Source Code:
File 1 of 1 : VaultWETH
// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.6.11;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* @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
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 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");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(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");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
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
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.0.0, only sets of type `address` (`AddressSet`) and `uint256`
* (`UintSet`) are supported.
*/
library EnumerableSet {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) { // Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(value)));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(value)));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(value)));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint256(_at(set._inner, index)));
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
}
/**
* @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 SafeMath for uint256;
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'
// solhint-disable-next-line max-line-length
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).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_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
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
/**
* @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 `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, 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 `sender` to `recipient` 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 sender, address recipient, 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);
}
/**
* @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].
*/
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 () internal {
_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 make 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;
}
}
/**
* @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.
*
* By default, the owner account will be the one that deploys the contract. 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.
*/
contract Ownable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = msg.sender;
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == msg.sender, "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = 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 {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
interface CEther {
function mint() external payable;
function exchangeRateCurrent() external returns (uint256);
function exchangeRateStored() external view returns (uint256);
function supplyRatePerBlock() external returns (uint256);
function redeem(uint) external returns (uint);
function redeemUnderlying(uint) external returns (uint);
}
interface IUniswapV2Router {
function WETH() external pure returns (address);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
}
interface IWETH {
function deposit() external payable;
function transfer(address to, uint value) external returns (bool);
function withdraw(uint) external;
}
/**
* Accounting:
* - the smart contract maintains a ledger of token balances which changes upon actions affecting
* this smart contract's token balance.
*
* - it allows owner to withdraw any extra amount of any tokens that have not been recorded,
* i.e, - any tokens that are accidentally transferred to this smart contract.
*
* - care must be taken in auditing that `claimExtraTokens` function does not allow withdrawals of
* any tokens in this smart contract in more amounts than necessary. In simple terms, admin can
* only transfer out tokens that are accidentally sent to this smart contract. Nothing more nothing less.
*/
contract VaultWETH is Ownable, ReentrancyGuard {
using SafeMath for uint;
using Address for address;
using EnumerableSet for EnumerableSet.AddressSet;
using SafeERC20 for IERC20;
//==================== Contract Variables =======================
// Contract variables must be changed before live deployment
uint public constant LOCKUP_DURATION = 3 days;
uint public constant FEE_PERCENT_X_100 = 30;
uint public constant FEE_PERCENT_TO_BUYBACK_X_100 = 2500;
uint public constant REWARD_INTERVAL = 365 days;
uint public constant ADMIN_CAN_CLAIM_AFTER = 395 days;
uint public constant REWARD_RETURN_PERCENT_X_100 = 250;
// ETH fee equivalent predefined gas price
uint public constant MIN_ETH_FEE_IN_WEI = 40000 * 1 * 10**9;
address public constant TRUSTED_CTOKEN_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5;
address public constant TRUSTED_PLATFORM_TOKEN_ADDRESS = 0x961C8c0B1aaD0c0b10a51FeF6a867E3091BCef17;
address public constant BURN_ADDRESS = 0x000000000000000000000000000000000000dEaD;
//================= End Contract Variables ======================
IUniswapV2Router public constant uniswapRouterV2 = IUniswapV2Router(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uint public constant ONE_HUNDRED_X_100 = 10000;
uint public immutable contractStartTime;
address public immutable TRUSTED_DEPOSIT_TOKEN_ADDRESS;
constructor() public {
contractStartTime = block.timestamp;
TRUSTED_DEPOSIT_TOKEN_ADDRESS = uniswapRouterV2.WETH();
}
modifier noContractsAllowed() {
require(tx.origin == msg.sender, "No Contracts Allowed!");
_;
}
// ------------------- event definitions -------------------
event Deposit(address indexed account, uint amount);
event Withdraw(address indexed account, uint amount);
event EtherRewardDisbursed(uint amount);
event TokenRewardDisbursed(uint amount);
event PlatformTokenRewardClaimed(address indexed account, uint amount);
event CompoundRewardClaimed(address indexed account, uint amount);
event EtherRewardClaimed(address indexed account, uint amount);
event TokenRewardClaimed(address indexed account, uint amount);
event PlatformTokenAdded(uint amount);
// ----------------- end event definitions -----------------
EnumerableSet.AddressSet private holders;
// view functon to get number of stakers
function getNumberOfHolders() public view returns (uint) {
return holders.length();
}
// token contract address => token balance of this contract
mapping (address => uint) public tokenBalances;
// user wallet => balance
mapping (address => uint) public cTokenBalance;
mapping (address => uint) public depositTokenBalance;
mapping (address => uint) public totalTokensDepositedByUser;
mapping (address => uint) public totalTokensWithdrawnByUser;
mapping (address => uint) public totalEarnedCompoundDivs;
mapping (address => uint) public totalEarnedEthDivs;
mapping (address => uint) public totalEarnedTokenDivs;
mapping (address => uint) public totalEarnedPlatformTokenDivs;
mapping (address => uint) public depositTime;
mapping (address => uint) public lastClaimedTime;
uint public totalCTokens;
uint public totalDepositedTokens;
// -----------------
uint public constant POINT_MULTIPLIER = 1e18;
mapping (address => uint) public lastTokenDivPoints;
mapping (address => uint) public tokenDivsBalance;
uint public totalTokenDivPoints;
mapping (address => uint) public lastEthDivPoints;
mapping (address => uint) public ethDivsBalance;
uint public totalEthDivPoints;
mapping (address => uint) public platformTokenDivsBalance;
uint public totalEthDisbursed;
uint public totalTokensDisbursed;
function tokenDivsOwing(address account) public view returns (uint) {
uint newDivPoints = totalTokenDivPoints.sub(lastTokenDivPoints[account]);
return depositTokenBalance[account].mul(newDivPoints).div(POINT_MULTIPLIER);
}
function ethDivsOwing(address account) public view returns (uint) {
uint newDivPoints = totalEthDivPoints.sub(lastEthDivPoints[account]);
return depositTokenBalance[account].mul(newDivPoints).div(POINT_MULTIPLIER);
}
function distributeEthDivs(uint amount) private {
if (totalDepositedTokens == 0) return;
totalEthDivPoints = totalEthDivPoints.add(amount.mul(POINT_MULTIPLIER).div(totalDepositedTokens));
totalEthDisbursed = totalEthDisbursed.add(amount);
increaseTokenBalance(address(0), amount);
emit EtherRewardDisbursed(amount);
}
function distributeTokenDivs(uint amount) private {
if (totalDepositedTokens == 0) return;
totalTokenDivPoints = totalTokenDivPoints.add(amount.mul(POINT_MULTIPLIER).div(totalDepositedTokens));
totalTokensDisbursed = totalTokensDisbursed.add(amount);
increaseTokenBalance(TRUSTED_DEPOSIT_TOKEN_ADDRESS, amount);
emit TokenRewardDisbursed(amount);
}
// -----------------
// view function to get depositors list
function getDepositorsList(uint startIndex, uint endIndex)
public
view
returns (address[] memory stakers,
uint[] memory stakingTimestamps,
uint[] memory lastClaimedTimeStamps,
uint[] memory stakedTokens) {
require (startIndex < endIndex);
uint length = endIndex.sub(startIndex);
address[] memory _stakers = new address[](length);
uint[] memory _stakingTimestamps = new uint[](length);
uint[] memory _lastClaimedTimeStamps = new uint[](length);
uint[] memory _stakedTokens = new uint[](length);
for (uint i = startIndex; i < endIndex; i = i.add(1)) {
address staker = holders.at(i);
uint listIndex = i.sub(startIndex);
_stakers[listIndex] = staker;
_stakingTimestamps[listIndex] = depositTime[staker];
_lastClaimedTimeStamps[listIndex] = lastClaimedTime[staker];
_stakedTokens[listIndex] = depositTokenBalance[staker];
}
return (_stakers, _stakingTimestamps, _lastClaimedTimeStamps, _stakedTokens);
}
function updateAccount(address account) private {
// update user account here
uint tokensOwing = tokenDivsOwing(account);
lastTokenDivPoints[account] = totalTokenDivPoints;
if (tokensOwing > 0) {
tokenDivsBalance[account] = tokenDivsBalance[account].add(tokensOwing);
}
uint weiOwing = ethDivsOwing(account);
lastEthDivPoints[account] = totalEthDivPoints;
if (weiOwing > 0) {
ethDivsBalance[account] = ethDivsBalance[account].add(weiOwing);
}
uint platformTokensOwing = platformTokenDivsOwing(account);
if (platformTokensOwing > 0) {
platformTokenDivsBalance[account] = platformTokenDivsBalance[account].add(platformTokensOwing);
}
lastClaimedTime[account] = block.timestamp;
}
function platformTokenDivsOwing(address account) public view returns (uint) {
if (!holders.contains(account)) return 0;
if (depositTokenBalance[account] == 0) return 0;
uint timeDiff;
uint stakingEndTime = contractStartTime.add(REWARD_INTERVAL);
uint _now = block.timestamp;
if (_now > stakingEndTime) {
_now = stakingEndTime;
}
if (lastClaimedTime[account] >= _now) {
timeDiff = 0;
} else {
timeDiff = _now.sub(lastClaimedTime[account]);
}
uint pendingDivs = depositTokenBalance[account]
.mul(REWARD_RETURN_PERCENT_X_100)
.mul(timeDiff)
.div(REWARD_INTERVAL)
.div(ONE_HUNDRED_X_100);
return pendingDivs;
}
function getEstimatedCompoundDivsOwing(address account) public view returns (uint) {
uint convertedBalance = getConvertedBalance(cTokenBalance[account]);
uint depositedBalance = depositTokenBalance[account];
return (convertedBalance > depositedBalance ? convertedBalance.sub(depositedBalance) : 0);
}
function getConvertedBalance(uint _cTokenBalance) public view returns (uint) {
uint exchangeRateStored = getExchangeRateStored();
uint convertedBalance = _cTokenBalance.mul(exchangeRateStored).div(10**18);
return convertedBalance;
}
function _claimEthDivs() private {
updateAccount(msg.sender);
uint amount = ethDivsBalance[msg.sender];
ethDivsBalance[msg.sender] = 0;
if (amount == 0) return;
decreaseTokenBalance(address(0), amount);
msg.sender.transfer(amount);
totalEarnedEthDivs[msg.sender] = totalEarnedEthDivs[msg.sender].add(amount);
emit EtherRewardClaimed(msg.sender, amount);
}
function _claimTokenDivs() private {
updateAccount(msg.sender);
uint amount = tokenDivsBalance[msg.sender];
tokenDivsBalance[msg.sender] = 0;
if (amount == 0) return;
decreaseTokenBalance(TRUSTED_DEPOSIT_TOKEN_ADDRESS, amount);
IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).safeTransfer(msg.sender, amount);
totalEarnedTokenDivs[msg.sender] = totalEarnedTokenDivs[msg.sender].add(amount);
emit TokenRewardClaimed(msg.sender, amount);
}
function _claimCompoundDivs() private {
updateAccount(msg.sender);
uint exchangeRateCurrent = getExchangeRateCurrent();
uint convertedBalance = cTokenBalance[msg.sender].mul(exchangeRateCurrent).div(10**18);
uint depositedBalance = depositTokenBalance[msg.sender];
uint amount = convertedBalance > depositedBalance ? convertedBalance.sub(depositedBalance) : 0;
if (amount == 0) return;
uint oldCTokenBalance = IERC20(TRUSTED_CTOKEN_ADDRESS).balanceOf(address(this));
uint oldEtherBalance = address(this).balance;
require(CEther(TRUSTED_CTOKEN_ADDRESS).redeemUnderlying(amount) == 0, "redeemUnderlying failed!");
uint newCTokenBalance = IERC20(TRUSTED_CTOKEN_ADDRESS).balanceOf(address(this));
uint newEtherBalance = address(this).balance;
uint depositTokenReceived = newEtherBalance.sub(oldEtherBalance);
uint cTokenRedeemed = oldCTokenBalance.sub(newCTokenBalance);
IWETH(TRUSTED_DEPOSIT_TOKEN_ADDRESS).deposit{value: depositTokenReceived}();
require(cTokenRedeemed <= cTokenBalance[msg.sender], "redeem exceeds balance!");
cTokenBalance[msg.sender] = cTokenBalance[msg.sender].sub(cTokenRedeemed);
totalCTokens = totalCTokens.sub(cTokenRedeemed);
decreaseTokenBalance(TRUSTED_CTOKEN_ADDRESS, cTokenRedeemed);
totalTokensWithdrawnByUser[msg.sender] = totalTokensWithdrawnByUser[msg.sender].add(depositTokenReceived);
IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).safeTransfer(msg.sender, depositTokenReceived);
totalEarnedCompoundDivs[msg.sender] = totalEarnedCompoundDivs[msg.sender].add(depositTokenReceived);
emit CompoundRewardClaimed(msg.sender, depositTokenReceived);
}
function _claimPlatformTokenDivs(uint _amountOutMin_platformTokens) private {
updateAccount(msg.sender);
uint amount = platformTokenDivsBalance[msg.sender];
if (amount == 0) return;
address[] memory path = new address[](2);
path[0] = TRUSTED_DEPOSIT_TOKEN_ADDRESS;
path[1] = TRUSTED_PLATFORM_TOKEN_ADDRESS;
uint estimatedAmountOut = uniswapRouterV2.getAmountsOut(amount, path)[1];
require(estimatedAmountOut >= _amountOutMin_platformTokens, "_claimPlatformTokenDivs: slippage error!");
if (IERC20(TRUSTED_PLATFORM_TOKEN_ADDRESS).balanceOf(address(this)) < estimatedAmountOut) {
return;
}
platformTokenDivsBalance[msg.sender] = 0;
decreaseTokenBalance(TRUSTED_PLATFORM_TOKEN_ADDRESS, estimatedAmountOut);
IERC20(TRUSTED_PLATFORM_TOKEN_ADDRESS).safeTransfer(msg.sender, estimatedAmountOut);
totalEarnedPlatformTokenDivs[msg.sender] = totalEarnedPlatformTokenDivs[msg.sender].add(estimatedAmountOut);
emit PlatformTokenRewardClaimed(msg.sender, estimatedAmountOut);
}
function claimEthDivs() external noContractsAllowed nonReentrant {
_claimEthDivs();
}
function claimTokenDivs() external noContractsAllowed nonReentrant {
_claimTokenDivs();
}
function claimCompoundDivs() external noContractsAllowed nonReentrant {
_claimCompoundDivs();
}
function claimPlatformTokenDivs(uint _amountOutMin_platformTokens) external noContractsAllowed nonReentrant {
_claimPlatformTokenDivs(_amountOutMin_platformTokens);
}
function claim(uint _amountOutMin_platformTokens) external noContractsAllowed nonReentrant {
_claimEthDivs();
_claimTokenDivs();
_claimCompoundDivs();
_claimPlatformTokenDivs(_amountOutMin_platformTokens);
}
function getExchangeRateCurrent() public returns (uint) {
uint exchangeRateCurrent = CEther(TRUSTED_CTOKEN_ADDRESS).exchangeRateCurrent();
return exchangeRateCurrent;
}
function getExchangeRateStored() public view returns (uint) {
uint exchangeRateStored = CEther(TRUSTED_CTOKEN_ADDRESS).exchangeRateStored();
return exchangeRateStored;
}
function deposit(uint amount, uint _amountOutMin_ethFeeBuyBack, uint deadline) external noContractsAllowed nonReentrant payable {
require(amount > 0, "invalid amount!");
updateAccount(msg.sender);
// increment token balance!
IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).safeTransferFrom(msg.sender, address(this), amount);
totalTokensDepositedByUser[msg.sender] = totalTokensDepositedByUser[msg.sender].add(amount);
IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).safeApprove(TRUSTED_CTOKEN_ADDRESS, 0);
IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).safeApprove(TRUSTED_CTOKEN_ADDRESS, amount);
uint oldCTokenBalance = IERC20(TRUSTED_CTOKEN_ADDRESS).balanceOf(address(this));
IWETH(TRUSTED_DEPOSIT_TOKEN_ADDRESS).withdraw(amount);
CEther(TRUSTED_CTOKEN_ADDRESS).mint{value: amount}();
uint newCTokenBalance = IERC20(TRUSTED_CTOKEN_ADDRESS).balanceOf(address(this));
uint cTokenReceived = newCTokenBalance.sub(oldCTokenBalance);
cTokenBalance[msg.sender] = cTokenBalance[msg.sender].add(cTokenReceived);
totalCTokens = totalCTokens.add(cTokenReceived);
increaseTokenBalance(TRUSTED_CTOKEN_ADDRESS, cTokenReceived);
depositTokenBalance[msg.sender] = depositTokenBalance[msg.sender].add(amount);
totalDepositedTokens = totalDepositedTokens.add(amount);
handleEthFee(msg.value, _amountOutMin_ethFeeBuyBack, deadline);
holders.add(msg.sender);
depositTime[msg.sender] = block.timestamp;
emit Deposit(msg.sender, amount);
}
function withdraw(uint amount, uint _amountOutMin_ethFeeBuyBack, uint _amountOutMin_tokenFeeBuyBack, uint deadline) external noContractsAllowed nonReentrant payable {
require(amount > 0, "invalid amount!");
require(amount <= depositTokenBalance[msg.sender], "Cannot withdraw more than deposited!");
require(block.timestamp.sub(depositTime[msg.sender]) > LOCKUP_DURATION, "You recently deposited, please wait before withdrawing.");
updateAccount(msg.sender);
depositTokenBalance[msg.sender] = depositTokenBalance[msg.sender].sub(amount);
totalDepositedTokens = totalDepositedTokens.sub(amount);
uint oldCTokenBalance = IERC20(TRUSTED_CTOKEN_ADDRESS).balanceOf(address(this));
uint oldEtherBalance = address(this).balance;
require(CEther(TRUSTED_CTOKEN_ADDRESS).redeemUnderlying(amount) == 0, "redeemUnderlying failed!");
uint newCTokenBalance = IERC20(TRUSTED_CTOKEN_ADDRESS).balanceOf(address(this));
uint newEtherBalance = address(this).balance;
uint depositTokenReceived = newEtherBalance.sub(oldEtherBalance);
uint cTokenRedeemed = oldCTokenBalance.sub(newCTokenBalance);
IWETH(TRUSTED_DEPOSIT_TOKEN_ADDRESS).deposit{value: depositTokenReceived}();
require(cTokenRedeemed <= cTokenBalance[msg.sender], "redeem exceeds balance!");
cTokenBalance[msg.sender] = cTokenBalance[msg.sender].sub(cTokenRedeemed);
totalCTokens = totalCTokens.sub(cTokenRedeemed);
decreaseTokenBalance(TRUSTED_CTOKEN_ADDRESS, cTokenRedeemed);
totalTokensWithdrawnByUser[msg.sender] = totalTokensWithdrawnByUser[msg.sender].add(depositTokenReceived);
uint feeAmount = depositTokenReceived.mul(FEE_PERCENT_X_100).div(ONE_HUNDRED_X_100);
uint depositTokenReceivedAfterFee = depositTokenReceived.sub(feeAmount);
IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).safeTransfer(msg.sender, depositTokenReceivedAfterFee);
handleFee(feeAmount, _amountOutMin_tokenFeeBuyBack, deadline);
handleEthFee(msg.value, _amountOutMin_ethFeeBuyBack, deadline);
if (depositTokenBalance[msg.sender] == 0) {
holders.remove(msg.sender);
}
emit Withdraw(msg.sender, depositTokenReceived);
}
// emergency withdraw without interacting with uniswap
function emergencyWithdraw(uint amount) external noContractsAllowed nonReentrant payable {
require(amount > 0, "invalid amount!");
require(amount <= depositTokenBalance[msg.sender], "Cannot withdraw more than deposited!");
require(block.timestamp.sub(depositTime[msg.sender]) > LOCKUP_DURATION, "You recently deposited, please wait before withdrawing.");
updateAccount(msg.sender);
depositTokenBalance[msg.sender] = depositTokenBalance[msg.sender].sub(amount);
totalDepositedTokens = totalDepositedTokens.sub(amount);
uint oldCTokenBalance = IERC20(TRUSTED_CTOKEN_ADDRESS).balanceOf(address(this));
uint oldEtherBalance = address(this).balance;
require(CEther(TRUSTED_CTOKEN_ADDRESS).redeemUnderlying(amount) == 0, "redeemUnderlying failed!");
uint newCTokenBalance = IERC20(TRUSTED_CTOKEN_ADDRESS).balanceOf(address(this));
uint newEtherBalance = address(this).balance;
uint depositTokenReceived = newEtherBalance.sub(oldEtherBalance);
uint cTokenRedeemed = oldCTokenBalance.sub(newCTokenBalance);
IWETH(TRUSTED_DEPOSIT_TOKEN_ADDRESS).deposit{value: depositTokenReceived}();
require(cTokenRedeemed <= cTokenBalance[msg.sender], "redeem exceeds balance!");
cTokenBalance[msg.sender] = cTokenBalance[msg.sender].sub(cTokenRedeemed);
totalCTokens = totalCTokens.sub(cTokenRedeemed);
decreaseTokenBalance(TRUSTED_CTOKEN_ADDRESS, cTokenRedeemed);
totalTokensWithdrawnByUser[msg.sender] = totalTokensWithdrawnByUser[msg.sender].add(depositTokenReceived);
uint feeAmount = depositTokenReceived.mul(FEE_PERCENT_X_100).div(ONE_HUNDRED_X_100);
uint depositTokenReceivedAfterFee = depositTokenReceived.sub(feeAmount);
IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).safeTransfer(msg.sender, depositTokenReceivedAfterFee);
// no uniswap interaction
// handleFee(feeAmount, _amountOutMin_tokenFeeBuyBack, deadline);
// handleEthFee(msg.value, _amountOutMin_ethFeeBuyBack, deadline);
if (depositTokenBalance[msg.sender] == 0) {
holders.remove(msg.sender);
}
emit Withdraw(msg.sender, depositTokenReceived);
}
function handleFee(uint feeAmount, uint _amountOutMin_tokenFeeBuyBack, uint deadline) private {
uint buyBackFeeAmount = feeAmount.mul(FEE_PERCENT_TO_BUYBACK_X_100).div(ONE_HUNDRED_X_100);
uint remainingFeeAmount = feeAmount.sub(buyBackFeeAmount);
// handle distribution
distributeTokenDivs(remainingFeeAmount);
// handle buyback
// --- swap token to platform token here! ----
IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).safeApprove(address(uniswapRouterV2), 0);
IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).safeApprove(address(uniswapRouterV2), buyBackFeeAmount);
uint oldPlatformTokenBalance = IERC20(TRUSTED_PLATFORM_TOKEN_ADDRESS).balanceOf(address(this));
address[] memory path = new address[](2);
path[0] = TRUSTED_DEPOSIT_TOKEN_ADDRESS;
path[1] = TRUSTED_PLATFORM_TOKEN_ADDRESS;
uniswapRouterV2.swapExactTokensForTokens(buyBackFeeAmount, _amountOutMin_tokenFeeBuyBack, path, address(this), deadline);
uint newPlatformTokenBalance = IERC20(TRUSTED_PLATFORM_TOKEN_ADDRESS).balanceOf(address(this));
uint platformTokensReceived = newPlatformTokenBalance.sub(oldPlatformTokenBalance);
IERC20(TRUSTED_PLATFORM_TOKEN_ADDRESS).safeTransfer(BURN_ADDRESS, platformTokensReceived);
// ---- end swap token to plaform tokens -----
}
function handleEthFee(uint feeAmount, uint _amountOutMin_ethFeeBuyBack, uint deadline) private {
require(feeAmount >= MIN_ETH_FEE_IN_WEI, "Insufficient ETH Fee!");
uint buyBackFeeAmount = feeAmount.mul(FEE_PERCENT_TO_BUYBACK_X_100).div(ONE_HUNDRED_X_100);
uint remainingFeeAmount = feeAmount.sub(buyBackFeeAmount);
// handle distribution
distributeEthDivs(remainingFeeAmount);
// handle buyback
// --- swap eth to platform token here! ----
uint oldPlatformTokenBalance = IERC20(TRUSTED_PLATFORM_TOKEN_ADDRESS).balanceOf(address(this));
address[] memory path = new address[](2);
path[0] = uniswapRouterV2.WETH();
path[1] = TRUSTED_PLATFORM_TOKEN_ADDRESS;
uniswapRouterV2.swapExactETHForTokens{value: buyBackFeeAmount}(_amountOutMin_ethFeeBuyBack, path, address(this), deadline);
uint newPlatformTokenBalance = IERC20(TRUSTED_PLATFORM_TOKEN_ADDRESS).balanceOf(address(this));
uint platformTokensReceived = newPlatformTokenBalance.sub(oldPlatformTokenBalance);
IERC20(TRUSTED_PLATFORM_TOKEN_ADDRESS).safeTransfer(BURN_ADDRESS, platformTokensReceived);
// ---- end swap eth to plaform tokens -----
}
receive () external payable {
// receive eth do nothing
}
function increaseTokenBalance(address token, uint amount) private {
tokenBalances[token] = tokenBalances[token].add(amount);
}
function decreaseTokenBalance(address token, uint amount) private {
tokenBalances[token] = tokenBalances[token].sub(amount);
}
function addPlatformTokenBalance(uint amount) external nonReentrant onlyOwner {
increaseTokenBalance(TRUSTED_PLATFORM_TOKEN_ADDRESS, amount);
IERC20(TRUSTED_PLATFORM_TOKEN_ADDRESS).safeTransferFrom(msg.sender, address(this), amount);
emit PlatformTokenAdded(amount);
}
function claimExtraTokens(address token) external nonReentrant onlyOwner {
if (token == address(0)) {
uint ethDiff = address(this).balance.sub(tokenBalances[token]);
msg.sender.transfer(ethDiff);
return;
}
uint diff = IERC20(token).balanceOf(address(this)).sub(tokenBalances[token]);
IERC20(token).safeTransfer(msg.sender, diff);
}
function claimAnyToken(address token, uint amount) external onlyOwner {
require(now > contractStartTime.add(ADMIN_CAN_CLAIM_AFTER), "Contract not expired yet!");
if (token == address(0)) {
msg.sender.transfer(amount);
return;
}
IERC20(token).safeTransfer(msg.sender, amount);
}
}