编译器
0.8.16+commit.07a7930e
文件 1 的 5:Context.sol
pragma solidity ^0.8.0;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
文件 2 的 5:IERC20.sol
pragma solidity ^0.8.0;
interface IERC20 {
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address to, 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 from,
address to,
uint256 amount
) external returns (bool);
}
文件 3 的 5:IMintableERC20.sol
pragma solidity ^0.8.16;
import "openzeppelin/token/ERC20/IERC20.sol";
interface IMintableERC20 is IERC20 {
function mint(address to, uint256 amount) external;
}
文件 4 的 5:Ownable.sol
pragma solidity ^0.8.0;
import "../utils/Context.sol";
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() {
_transferOwnership(_msgSender());
}
modifier onlyOwner() {
_checkOwner();
_;
}
function owner() public view virtual returns (address) {
return _owner;
}
function _checkOwner() internal view virtual {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
}
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
文件 5 的 5:VoidStakeV2.sol
pragma solidity ^0.8.16;
import "openzeppelin/token/ERC20/IERC20.sol";
import "openzeppelin/access/Ownable.sol";
import "./IMintableERC20.sol";
contract VoidStakeV2 is Ownable {
error ZeroStakeAmount();
error ZeroWithdrawAmount();
error InvalidWithdrawAmount();
event VoidStaked(address indexed account, uint256 amount);
event VoidWithdraw(address indexed account, uint256 amount);
event VoidClaimed(address indexed account, uint256 amount);
event RewardRateChanged(uint256 rewardRate);
address public immutable stakingTokenAddress;
address public immutable rewardTokenAddress;
uint256 public immutable rewardStartTime;
uint256 public rewardRate = 1e13;
mapping(address => uint256) public userStakedAmount;
uint256 public totalStaked;
uint256 private lastUpdatedAt;
uint256 private currentRewardPerTokenE18;
mapping(address => uint256) private userLastRewardPerToken;
mapping(address => uint256) private userClaimableRewardTokens;
constructor(address _s, address _r) {
stakingTokenAddress = _s;
rewardTokenAddress = _r;
rewardStartTime = block.timestamp - 1262748;
}
modifier updateRewardVariables(address account) {
uint256 _currentRewardPerToken = calculateRewardPerTokenE18();
currentRewardPerTokenE18 = _currentRewardPerToken;
lastUpdatedAt = block.timestamp;
userClaimableRewardTokens[account] = calculateClaimableRewardTokens(account, _currentRewardPerToken);
userLastRewardPerToken[account] = _currentRewardPerToken;
_;
}
function claimableRewardTokens(address account) public view returns (uint256) {
uint256 _currentRewardPerToken = calculateRewardPerTokenE18();
return calculateClaimableRewardTokens(account, _currentRewardPerToken);
}
function stake(uint256 amount) external updateRewardVariables(msg.sender) {
if (amount == 0) { revert ZeroStakeAmount(); }
IERC20(stakingTokenAddress).transferFrom(msg.sender, address(this), amount);
totalStaked += amount;
userStakedAmount[msg.sender] += amount;
emit VoidStaked(msg.sender, amount);
}
function withdraw(uint256 amount) external updateRewardVariables(msg.sender) {
if (amount == 0) { revert ZeroWithdrawAmount(); }
if (amount > userStakedAmount[msg.sender]) { revert InvalidWithdrawAmount(); }
IERC20(stakingTokenAddress).transfer(msg.sender, amount);
totalStaked -= amount;
userStakedAmount[msg.sender] -= amount;
emit VoidWithdraw(msg.sender, amount);
}
function claim() external updateRewardVariables(msg.sender) {
uint256 reward = userClaimableRewardTokens[msg.sender];
if (reward == 0) { return; }
userClaimableRewardTokens[msg.sender] = 0;
IMintableERC20(rewardTokenAddress).mint(msg.sender, reward);
emit VoidClaimed(msg.sender, reward);
}
function calculateRewardPerTokenE18() private view returns (uint256) {
if (totalStaked == 0) { return currentRewardPerTokenE18; }
return currentRewardPerTokenE18 + (rewardRate * (block.timestamp - lastUpdatedAt) * 1e18) / totalStaked;
}
function calculateClaimableRewardTokens(address account, uint256 _currentRewardPerToken) private view returns (uint256) {
return userClaimableRewardTokens[account] + userStakedAmount[account] * (_currentRewardPerToken - userLastRewardPerToken[account]) / 1e18;
}
function setRewardRate(uint256 _rewardRate) external onlyOwner {
rewardRate = _rewardRate;
emit RewardRateChanged(_rewardRate);
}
}
{
"compilationTarget": {
"src/VoidStakeV2.sol": "VoidStakeV2"
},
"evmVersion": "london",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": [
":ds-test/=lib/forge-std/lib/ds-test/src/",
":forge-std/=lib/forge-std/src/",
":openzeppelin/=lib/openzeppelin-contracts/contracts/"
]
}
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