编译器
0.6.12+commit.27d51765
文件 1 的 7:BurnVault.sol
pragma solidity 0.6.12;
import "../libraries/math/SafeMath.sol";
import "../libraries/token/IERC20.sol";
import "../libraries/utils/ReentrancyGuard.sol";
import "../interfaces/IXVIX.sol";
import "../interfaces/IFloor.sol";
import "../interfaces/IX2Fund.sol";
contract BurnVault is ReentrancyGuard, IERC20 {
using SafeMath for uint256;
string public constant name = "XVIX BurnVault";
string public constant symbol = "XVIX:BV";
uint8 public constant decimals = 18;
uint256 constant PRECISION = 1e30;
address public token;
address public floor;
address public gov;
address public distributor;
uint256 public initialDivisor;
uint256 public _totalSupply;
mapping (address => uint256) public balances;
mapping (address => bool) public senders;
uint256 public cumulativeRewardPerToken;
mapping (address => uint256) public claimableReward;
mapping (address => uint256) public previousCumulatedRewardPerToken;
event Deposit(address account, uint256 amount);
event Withdraw(address account, uint256 amount);
event Transfer(address indexed from, address indexed to, uint256 value);
event GovChange(address gov);
event Claim(address receiver, uint256 amount);
modifier onlyGov() {
require(msg.sender == gov, "BurnVault: forbidden");
_;
}
constructor(address _token, address _floor) public {
token = _token;
floor = _floor;
initialDivisor = IXVIX(_token).normalDivisor();
gov = msg.sender;
}
receive() external payable {}
function setGov(address _gov) external onlyGov {
gov = _gov;
emit GovChange(_gov);
}
function setDistributor(address _distributor) external onlyGov {
distributor = _distributor;
}
function addSender(address _sender) external onlyGov {
require(!senders[_sender], "BurnVault: sender already added");
senders[_sender] = true;
}
function removeSender(address _sender) external onlyGov {
require(senders[_sender], "BurnVault: invalid sender");
senders[_sender] = false;
}
function deposit(uint256 _amount) external nonReentrant {
require(_amount > 0, "BurnVault: insufficient amount");
address account = msg.sender;
_updateRewards(account, true);
IERC20(token).transferFrom(account, address(this), _amount);
uint256 scaledAmount = _amount.mul(getDivisor());
balances[account] = balances[account].add(scaledAmount);
_totalSupply = _totalSupply.add(scaledAmount);
emit Deposit(account, _amount);
emit Transfer(address(0), account, _amount);
}
function withdraw(address _receiver, uint256 _amount) external nonReentrant {
require(_amount > 0, "BurnVault: insufficient amount");
address account = msg.sender;
_updateRewards(account, true);
_withdraw(account, _receiver, _amount);
}
function withdrawWithoutDistribution(address _receiver, uint256 _amount) external nonReentrant {
require(_amount > 0, "BurnVault: insufficient amount");
address account = msg.sender;
_updateRewards(account, false);
_withdraw(account, _receiver, _amount);
}
function claim(address _receiver) external nonReentrant {
address _account = msg.sender;
_updateRewards(_account, true);
uint256 rewardToClaim = claimableReward[_account];
claimableReward[_account] = 0;
(bool success,) = _receiver.call{value: rewardToClaim}("");
require(success, "BurnVault: transfer failed");
emit Claim(_receiver, rewardToClaim);
}
function refund(address _receiver) external nonReentrant returns (uint256) {
require(senders[msg.sender], "BurnVault: forbidden");
uint256 _toBurn = toBurn();
if (_toBurn == 0) {
return 0;
}
uint256 refundAmount = IFloor(floor).getRefundAmount(_toBurn);
if (refundAmount == 0) {
return 0;
}
uint256 ethAmount = IFloor(floor).refund(_receiver, _toBurn);
return ethAmount;
}
function totalSupply() public override view returns (uint256) {
return _totalSupply.div(getDivisor());
}
function balanceOf(address account) public override view returns (uint256) {
return balances[account].div(getDivisor());
}
function toBurn() public view returns (uint256) {
uint256 balance = IERC20(token).balanceOf(address(this));
return balance.sub(totalSupply());
}
function getDivisor() public view returns (uint256) {
uint256 normalDivisor = IXVIX(token).normalDivisor();
uint256 _initialDivisor = initialDivisor;
uint256 diff = normalDivisor.sub(_initialDivisor).div(2);
return _initialDivisor.add(diff);
}
function transfer(address , uint256 ) public override returns (bool) {
revert("BurnVault: non-transferrable");
}
function allowance(address , address ) public view virtual override returns (uint256) {
return 0;
}
function approve(address , uint256 ) public virtual override returns (bool) {
revert("BurnVault: non-transferrable");
}
function transferFrom(address , address , uint256 ) public virtual override returns (bool) {
revert("BurnVault: non-transferrable");
}
function _withdraw(address _account, address _receiver, uint256 _amount) private {
uint256 scaledAmount = _amount.mul(getDivisor());
require(balances[_account] >= scaledAmount, "BurnVault: insufficient balance");
balances[_account] = balances[_account].sub(scaledAmount);
_totalSupply = _totalSupply.sub(scaledAmount);
IERC20(token).transfer(_receiver, _amount);
emit Withdraw(_account, _amount);
emit Transfer(_account, address(0), _amount);
}
function _updateRewards(address _account, bool _distribute) private {
uint256 blockReward;
if (_distribute && distributor != address(0)) {
blockReward = IX2Fund(distributor).distribute();
}
uint256 _cumulativeRewardPerToken = cumulativeRewardPerToken;
if (_totalSupply > 0 && blockReward > 0) {
_cumulativeRewardPerToken = _cumulativeRewardPerToken.add(blockReward.mul(PRECISION).div(_totalSupply));
cumulativeRewardPerToken = _cumulativeRewardPerToken;
}
if (_cumulativeRewardPerToken == 0) {
return;
}
uint256 _previousCumulatedReward = previousCumulatedRewardPerToken[_account];
uint256 _claimableReward = claimableReward[_account].add(
uint256(balances[_account]).mul(_cumulativeRewardPerToken.sub(_previousCumulatedReward)).div(PRECISION)
);
claimableReward[_account] = _claimableReward;
previousCumulatedRewardPerToken[_account] = _cumulativeRewardPerToken;
}
}
文件 2 的 7:IERC20.sol
pragma solidity 0.6.12;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
文件 3 的 7:IFloor.sol
pragma solidity 0.6.12;
interface IFloor {
function refund(address receiver, uint256 burnAmount) external returns (uint256);
function capital() external view returns (uint256);
function getMaxMintAmount(uint256 ethAmount) external view returns (uint256);
function getRefundAmount(uint256 _tokenAmount) external view returns (uint256);
}
文件 4 的 7:IX2Fund.sol
pragma solidity 0.6.12;
interface IX2Fund {
function distribute() external returns (uint256);
}
文件 5 的 7:IXVIX.sol
pragma solidity 0.6.12;
interface IXVIX {
function setGov(address gov) external;
function normalDivisor() external view returns (uint256);
function maxSupply() external view returns (uint256);
function mint(address account, uint256 amount) external returns (bool);
function burn(address account, uint256 amount) external returns (bool);
function toast(uint256 amount) external returns (bool);
function rebase() external returns (bool);
}
文件 6 的 7:ReentrancyGuard.sol
pragma solidity 0.6.12;
contract ReentrancyGuard {
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor () internal {
_status = _NOT_ENTERED;
}
modifier nonReentrant() {
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
_status = _ENTERED;
_;
_status = _NOT_ENTERED;
}
}
文件 7 的 7:SafeMath.sol
pragma solidity 0.6.12;
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
{
"compilationTarget": {
"contracts/xvix/BurnVault.sol": "BurnVault"
},
"evmVersion": "istanbul",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": []
}
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