From f163435241c6315cb2d9890b11df4a592434ec07 Mon Sep 17 00:00:00 2001 From: dustpan28646 <81492172+dustpan28646@users.noreply.github.com> Date: Wed, 28 Apr 2021 09:08:35 -0400 Subject: [PATCH] Revert "iETHRewards" --- contracts/IRewardDistributionRecipient.sol | 2 +- contracts/iETHRewards.sol | 134 ---- deployments/iETHRewards.full.abi | 1 - deployments/iETHRewards.full.bin | 1 - deployments/iETHRewards.full.sol | 686 --------------------- package.json | 3 +- 6 files changed, 2 insertions(+), 825 deletions(-) delete mode 100644 contracts/iETHRewards.sol delete mode 100644 deployments/iETHRewards.full.abi delete mode 100644 deployments/iETHRewards.full.bin delete mode 100644 deployments/iETHRewards.full.sol diff --git a/contracts/IRewardDistributionRecipient.sol b/contracts/IRewardDistributionRecipient.sol index 1143975..ea5e015 100644 --- a/contracts/IRewardDistributionRecipient.sol +++ b/contracts/IRewardDistributionRecipient.sol @@ -4,7 +4,7 @@ import "@openzeppelin/contracts/ownership/Ownable.sol"; contract IRewardDistributionRecipient is Ownable { - address public rewardDistribution; + address rewardDistribution; function notifyRewardAmount(uint256 reward) external; diff --git a/contracts/iETHRewards.sol b/contracts/iETHRewards.sol deleted file mode 100644 index b69acc0..0000000 --- a/contracts/iETHRewards.sol +++ /dev/null @@ -1,134 +0,0 @@ -pragma solidity ^0.5.0; - -import "@openzeppelin/contracts/math/Math.sol"; -import "@openzeppelin/contracts/math/SafeMath.sol"; -import "@openzeppelin/contracts/ownership/Ownable.sol"; -import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol"; -import "./IRewardDistributionRecipient.sol"; - -contract LPTokenWrapper { - using SafeMath for uint256; - using SafeERC20 for IERC20; - - IERC20 public token = IERC20(0xA9859874e1743A32409f75bB11549892138BBA1E); - - uint256 private _totalSupply; - mapping(address => uint256) private _balances; - - function totalSupply() public view returns (uint256) { - return _totalSupply; - } - - function balanceOf(address account) public view returns (uint256) { - return _balances[account]; - } - - function stake(uint256 amount) public { - _totalSupply = _totalSupply.add(amount); - _balances[msg.sender] = _balances[msg.sender].add(amount); - token.safeTransferFrom(msg.sender, address(this), amount); - } - - function withdraw(uint256 amount) public { - _totalSupply = _totalSupply.sub(amount); - _balances[msg.sender] = _balances[msg.sender].sub(amount); - token.safeTransfer(msg.sender, amount); - } -} - -contract iETHRewards is LPTokenWrapper, IRewardDistributionRecipient { - IERC20 public snx = IERC20(0xC011a73ee8576Fb46F5E1c5751cA3B9Fe0af2a6F); - uint256 public constant DURATION = 7 days; - - uint256 public periodFinish = 0; - uint256 public rewardRate = 0; - uint256 public lastUpdateTime; - uint256 public rewardPerTokenStored; - mapping(address => uint256) public userRewardPerTokenPaid; - mapping(address => uint256) public rewards; - - event RewardAdded(uint256 reward); - event Staked(address indexed user, uint256 amount); - event Withdrawn(address indexed user, uint256 amount); - event RewardPaid(address indexed user, uint256 reward); - - modifier updateReward(address account) { - rewardPerTokenStored = rewardPerToken(); - lastUpdateTime = lastTimeRewardApplicable(); - if (account != address(0)) { - rewards[account] = earned(account); - userRewardPerTokenPaid[account] = rewardPerTokenStored; - } - _; - } - - function lastTimeRewardApplicable() public view returns (uint256) { - return Math.min(block.timestamp, periodFinish); - } - - function rewardPerToken() public view returns (uint256) { - if (totalSupply() == 0) { - return rewardPerTokenStored; - } - return - rewardPerTokenStored.add( - lastTimeRewardApplicable() - .sub(lastUpdateTime) - .mul(rewardRate) - .mul(1e18) - .div(totalSupply()) - ); - } - - function earned(address account) public view returns (uint256) { - return - balanceOf(account) - .mul(rewardPerToken().sub(userRewardPerTokenPaid[account])) - .div(1e18) - .add(rewards[account]); - } - - // stake visibility is public as overriding LPTokenWrapper's stake() function - function stake(uint256 amount) public updateReward(msg.sender) { - require(amount > 0, "Cannot stake 0"); - super.stake(amount); - emit Staked(msg.sender, amount); - } - - function withdraw(uint256 amount) public updateReward(msg.sender) { - require(amount > 0, "Cannot withdraw 0"); - super.withdraw(amount); - emit Withdrawn(msg.sender, amount); - } - - function exit() external { - withdraw(balanceOf(msg.sender)); - getReward(); - } - - function getReward() public updateReward(msg.sender) { - uint256 reward = earned(msg.sender); - if (reward > 0) { - rewards[msg.sender] = 0; - snx.safeTransfer(msg.sender, reward); - emit RewardPaid(msg.sender, reward); - } - } - - function notifyRewardAmount(uint256 reward) - external - onlyRewardDistribution - updateReward(address(0)) - { - if (block.timestamp >= periodFinish) { - rewardRate = reward.div(DURATION); - } else { - uint256 remaining = periodFinish.sub(block.timestamp); - uint256 leftover = remaining.mul(rewardRate); - rewardRate = reward.add(leftover).div(DURATION); - } - lastUpdateTime = block.timestamp; - periodFinish = block.timestamp.add(DURATION); - emit RewardAdded(reward); - } -} diff --git a/deployments/iETHRewards.full.abi b/deployments/iETHRewards.full.abi deleted file mode 100644 index 36abb73..0000000 --- a/deployments/iETHRewards.full.abi +++ /dev/null @@ -1 +0,0 @@ -[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"reward","type":"uint256"}],"name":"RewardAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"reward","type":"uint256"}],"name":"RewardPaid","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Staked","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Withdrawn","type":"event"},{"constant":true,"inputs":[],"name":"DURATION","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"earned","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"exit","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"getReward","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"isOwner","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"lastTimeRewardApplicable","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"lastUpdateTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"reward","type":"uint256"}],"name":"notifyRewardAmount","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"periodFinish","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"renounceOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"rewardDistribution","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"rewardPerToken","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"rewardPerTokenStored","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"rewardRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"rewards","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"_rewardDistribution","type":"address"}],"name":"setRewardDistribution","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"snx","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"stake","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"token","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"userRewardPerTokenPaid","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdraw","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"}] \ No newline at end of file diff --git a/deployments/iETHRewards.full.bin b/deployments/iETHRewards.full.bin deleted file mode 100644 index 214c5f6..0000000 --- a/deployments/iETHRewards.full.bin +++ /dev/null @@ -1 +0,0 @@ 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\ No newline at end of file diff --git a/deployments/iETHRewards.full.sol b/deployments/iETHRewards.full.sol deleted file mode 100644 index e5a4d76..0000000 --- a/deployments/iETHRewards.full.sol +++ /dev/null @@ -1,686 +0,0 @@ - -// File: @openzeppelin/contracts/math/Math.sol - -pragma solidity ^0.5.0; - -/** - * @dev Standard math utilities missing in the Solidity language. - */ -library Math { - /** - * @dev Returns the largest of two numbers. - */ - function max(uint256 a, uint256 b) internal pure returns (uint256) { - return a >= b ? a : b; - } - - /** - * @dev Returns the smallest of two numbers. - */ - function min(uint256 a, uint256 b) internal pure returns (uint256) { - return a < b ? a : b; - } - - /** - * @dev Returns the average of two numbers. The result is rounded towards - * zero. - */ - function average(uint256 a, uint256 b) internal pure returns (uint256) { - // (a + b) / 2 can overflow, so we distribute - return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2); - } -} - -// File: @openzeppelin/contracts/math/SafeMath.sol - -pragma solidity ^0.5.0; - -/** - * @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. - * - * _Available since v2.4.0._ - */ - 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. - * - * _Available since v2.4.0._ - */ - function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { - // Solidity only automatically asserts when dividing by 0 - 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. - * - * _Available since v2.4.0._ - */ - function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { - require(b != 0, errorMessage); - return a % b; - } -} - -// File: @openzeppelin/contracts/GSN/Context.sol - -pragma solidity ^0.5.0; - -/* - * @dev Provides information about the current execution context, including the - * sender of the transaction and its data. While these are generally available - * via msg.sender and msg.data, they should not be accessed in such a direct - * manner, since when dealing with GSN meta-transactions the account sending and - * paying for execution may not be the actual sender (as far as an application - * is concerned). - * - * This contract is only required for intermediate, library-like contracts. - */ -contract Context { - // Empty internal constructor, to prevent people from mistakenly deploying - // an instance of this contract, which should be used via inheritance. - constructor () internal { } - // solhint-disable-previous-line no-empty-blocks - - function _msgSender() internal view returns (address payable) { - return msg.sender; - } - - function _msgData() internal view returns (bytes memory) { - this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 - return msg.data; - } -} - -// File: @openzeppelin/contracts/ownership/Ownable.sol - -pragma solidity ^0.5.0; - -/** - * @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. - * - * 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 is Context { - address private _owner; - - event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); - - /** - * @dev Initializes the contract setting the deployer as the initial owner. - */ - constructor () internal { - _owner = _msgSender(); - emit OwnershipTransferred(address(0), _owner); - } - - /** - * @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(isOwner(), "Ownable: caller is not the owner"); - _; - } - - /** - * @dev Returns true if the caller is the current owner. - */ - function isOwner() public view returns (bool) { - return _msgSender() == _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 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 onlyOwner { - _transferOwnership(newOwner); - } - - /** - * @dev Transfers ownership of the contract to a new account (`newOwner`). - */ - function _transferOwnership(address newOwner) internal { - require(newOwner != address(0), "Ownable: new owner is the zero address"); - emit OwnershipTransferred(_owner, newOwner); - _owner = newOwner; - } -} - -// File: @openzeppelin/contracts/token/ERC20/IERC20.sol - -pragma solidity ^0.5.0; - -/** - * @dev Interface of the ERC20 standard as defined in the EIP. Does not include - * the optional functions; to access them see {ERC20Detailed}. - */ -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); -} - -// File: @openzeppelin/contracts/utils/Address.sol - -pragma solidity ^0.5.5; - -/** - * @dev Collection of functions related to the address type - */ -library Address { - /** - * @dev Returns true if `account` is a contract. - * - * This test is non-exhaustive, and there may be false-negatives: during the - * execution of a contract's constructor, its address will be reported as - * not containing 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. - */ - 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. - - // According to EIP-1052, 0x0 is the value returned for not-yet created accounts - // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned - // for accounts without code, i.e. `keccak256('')` - bytes32 codehash; - bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; - // solhint-disable-next-line no-inline-assembly - assembly { codehash := extcodehash(account) } - return (codehash != 0x0 && codehash != accountHash); - } - - /** - * @dev Converts an `address` into `address payable`. Note that this is - * simply a type cast: the actual underlying value is not changed. - * - * _Available since v2.4.0._ - */ - function toPayable(address account) internal pure returns (address payable) { - return address(uint160(account)); - } - - /** - * @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]. - * - * _Available since v2.4.0._ - */ - function sendValue(address payable recipient, uint256 amount) internal { - require(address(this).balance >= amount, "Address: insufficient balance"); - - // solhint-disable-next-line avoid-call-value - (bool success, ) = recipient.call.value(amount)(""); - require(success, "Address: unable to send value, recipient may have reverted"); - } -} - -// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol - -pragma solidity ^0.5.0; - - - - -/** - * @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 ERC20;` 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)); - } - - 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. - - // A Solidity high level call has three parts: - // 1. The target address is checked to verify it contains contract code - // 2. The call itself is made, and success asserted - // 3. The return value is decoded, which in turn checks the size of the returned data. - // solhint-disable-next-line max-line-length - require(address(token).isContract(), "SafeERC20: call to non-contract"); - - // solhint-disable-next-line avoid-low-level-calls - (bool success, bytes memory returndata) = address(token).call(data); - require(success, "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"); - } - } -} - -// File: contracts/IRewardDistributionRecipient.sol - -pragma solidity ^0.5.0; - - - -contract IRewardDistributionRecipient is Ownable { - address public rewardDistribution; - - function notifyRewardAmount(uint256 reward) external; - - modifier onlyRewardDistribution() { - require(_msgSender() == rewardDistribution, "Caller is not reward distribution"); - _; - } - - function setRewardDistribution(address _rewardDistribution) - external - onlyOwner - { - rewardDistribution = _rewardDistribution; - } -} - -// File: contracts/iETHRewards.sol - -pragma solidity ^0.5.0; - - - - - - -contract LPTokenWrapper { - using SafeMath for uint256; - using SafeERC20 for IERC20; - - IERC20 public token = IERC20(0xA9859874e1743A32409f75bB11549892138BBA1E); - - uint256 private _totalSupply; - mapping(address => uint256) private _balances; - - function totalSupply() public view returns (uint256) { - return _totalSupply; - } - - function balanceOf(address account) public view returns (uint256) { - return _balances[account]; - } - - function stake(uint256 amount) public { - _totalSupply = _totalSupply.add(amount); - _balances[msg.sender] = _balances[msg.sender].add(amount); - token.safeTransferFrom(msg.sender, address(this), amount); - } - - function withdraw(uint256 amount) public { - _totalSupply = _totalSupply.sub(amount); - _balances[msg.sender] = _balances[msg.sender].sub(amount); - token.safeTransfer(msg.sender, amount); - } -} - -contract iETHRewards is LPTokenWrapper, IRewardDistributionRecipient { - IERC20 public snx = IERC20(0xC011a73ee8576Fb46F5E1c5751cA3B9Fe0af2a6F); - uint256 public constant DURATION = 7 days; - - uint256 public periodFinish = 0; - uint256 public rewardRate = 0; - uint256 public lastUpdateTime; - uint256 public rewardPerTokenStored; - mapping(address => uint256) public userRewardPerTokenPaid; - mapping(address => uint256) public rewards; - - event RewardAdded(uint256 reward); - event Staked(address indexed user, uint256 amount); - event Withdrawn(address indexed user, uint256 amount); - event RewardPaid(address indexed user, uint256 reward); - - modifier updateReward(address account) { - rewardPerTokenStored = rewardPerToken(); - lastUpdateTime = lastTimeRewardApplicable(); - if (account != address(0)) { - rewards[account] = earned(account); - userRewardPerTokenPaid[account] = rewardPerTokenStored; - } - _; - } - - function lastTimeRewardApplicable() public view returns (uint256) { - return Math.min(block.timestamp, periodFinish); - } - - function rewardPerToken() public view returns (uint256) { - if (totalSupply() == 0) { - return rewardPerTokenStored; - } - return - rewardPerTokenStored.add( - lastTimeRewardApplicable() - .sub(lastUpdateTime) - .mul(rewardRate) - .mul(1e18) - .div(totalSupply()) - ); - } - - function earned(address account) public view returns (uint256) { - return - balanceOf(account) - .mul(rewardPerToken().sub(userRewardPerTokenPaid[account])) - .div(1e18) - .add(rewards[account]); - } - - // stake visibility is public as overriding LPTokenWrapper's stake() function - function stake(uint256 amount) public updateReward(msg.sender) { - require(amount > 0, "Cannot stake 0"); - super.stake(amount); - emit Staked(msg.sender, amount); - } - - function withdraw(uint256 amount) public updateReward(msg.sender) { - require(amount > 0, "Cannot withdraw 0"); - super.withdraw(amount); - emit Withdrawn(msg.sender, amount); - } - - function exit() external { - withdraw(balanceOf(msg.sender)); - getReward(); - } - - function getReward() public updateReward(msg.sender) { - uint256 reward = earned(msg.sender); - if (reward > 0) { - rewards[msg.sender] = 0; - snx.safeTransfer(msg.sender, reward); - emit RewardPaid(msg.sender, reward); - } - } - - function notifyRewardAmount(uint256 reward) - external - onlyRewardDistribution - updateReward(address(0)) - { - if (block.timestamp >= periodFinish) { - rewardRate = reward.div(DURATION); - } else { - uint256 remaining = periodFinish.sub(block.timestamp); - uint256 leftover = remaining.mul(rewardRate); - rewardRate = reward.add(leftover).div(DURATION); - } - lastUpdateTime = block.timestamp; - periodFinish = block.timestamp.add(DURATION); - emit RewardAdded(reward); - } -} diff --git a/package.json b/package.json index 85102b2..ca04c64 100644 --- a/package.json +++ b/package.json @@ -38,7 +38,6 @@ "lint": "npm run lint:js && npm run lint:sol", "lint:fix": "npm run lint:js:fix && npm run lint:sol:fix", "dist": "truffle-flattener ./contracts/Unipool.sol > Unipool.full.sol && solcjs --bin --abi --optimize Unipool.full.sol && mv Unipool_full_sol_Unipool.bin Unipool.full.bin && mv Unipool_full_sol_Unipool.abi Unipool.full.abi && rm *_sol_*", - "dist:CurveRewards": "truffle-flattener ./contracts/CurveRewards.sol > CurveRewards.full.sol && solcjs --bin --abi --optimize CurveRewards.full.sol && mv CurveRewards.full.sol ./deployments/CurveRewards.full.sol && mv CurveRewards_full_sol_CurveRewards.bin ./deployments/CurveRewards.full.bin && mv CurveRewards_full_sol_CurveRewards.abi ./deployments/CurveRewards.full.abi && rm *_sol_*", - "dist:iETHRewards": "truffle-flattener ./contracts/iETHRewards.sol > iETHRewards.full.sol && solcjs --bin --abi --optimize iETHRewards.full.sol && mv iETHRewards.full.sol ./deployments/iETHRewards.full.sol && mv iETHRewards_full_sol_iETHRewards.bin ./deployments/iETHRewards.full.bin && mv iETHRewards_full_sol_iETHRewards.abi ./deployments/iETHRewards.full.abi && rm *_sol_*" + "dist:CurveRewards": "truffle-flattener ./contracts/CurveRewards.sol > CurveRewards.full.sol && solcjs --bin --abi --optimize CurveRewards.full.sol && mv CurveRewards.full.sol ./deployments/CurveRewards.full.sol && mv CurveRewards_full_sol_CurveRewards.bin ./deployments/CurveRewards.full.bin && mv CurveRewards_full_sol_CurveRewards.abi ./deployments/CurveRewards.full.abi && rm *_sol_*" } }