文件 1 的 8:Address.sol
pragma solidity ^0.8.0;
library Address {
function isContract(address account) internal view returns (bool) {
uint256 size;
assembly { size := extcodesize(account) }
return size > 0;
}
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
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");
}
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
if (returndata.length > 0) {
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
文件 2 的 8: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) {
this;
return msg.data;
}
}
文件 3 的 8:IERC20.sol
pragma solidity ^0.8.0;
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 4 的 8:IERC677Receiver.sol
pragma solidity ^0.8.0;
interface IERC677Receiver {
function onTokenTransfer(address _sender, uint _value, bytes calldata _data) external;
}
文件 5 的 8:Multicall.sol
pragma solidity ^0.8.0;
import "./Address.sol";
abstract contract Multicall {
function multicall(bytes[] calldata data) external returns (bytes[] memory results) {
results = new bytes[](data.length);
for (uint i = 0; i < data.length; i++) {
results[i] = Address.functionDelegateCall(address(this), data[i]);
}
return results;
}
}
文件 6 的 8: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 () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view virtual returns (address) {
return _owner;
}
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
文件 7 的 8:SafeERC20.sol
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../../../utils/Address.sol";
library SafeERC20 {
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint256 value) internal {
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
function _callOptionalReturn(IERC20 token, bytes memory data) private {
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
文件 8 的 8:Staking.sol
pragma solidity ^0.8.4;
pragma experimental ABIEncoderV2;
import "./interfaces/IERC677Receiver.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Multicall.sol";
contract Staking is Ownable, Multicall, IERC677Receiver {
using SafeERC20 for IERC20;
struct UserInfo {
uint256 amount;
int256 rewardDebt;
}
struct PoolInfo {
uint128 accRewardPerShare;
uint64 lastRewardBlock;
uint64 allocPoint;
}
IERC20 public rewardToken;
address public rewardOwner;
PoolInfo[] public poolInfo;
IERC20[] public lpToken;
mapping (uint256 => mapping (address => UserInfo)) public userInfo;
uint256 public totalAllocPoint;
uint256 public rewardPerBlock = 0;
uint256 private constant ACC_PRECISION = 1e12;
event Deposit(address indexed user, uint256 indexed pid, uint256 amount, address indexed to);
event Withdraw(address indexed user, uint256 indexed pid, uint256 amount, address indexed to);
event EmergencyWithdraw(address indexed user, uint256 indexed pid, uint256 amount, address indexed to);
event Harvest(address indexed user, uint256 indexed pid, uint256 amount);
event LogPoolAddition(uint256 indexed pid, uint256 allocPoint, IERC20 indexed lpToken);
event LogSetPool(uint256 indexed pid, uint256 allocPoint);
event LogUpdatePool(uint256 indexed pid, uint64 lastRewardBlock, uint256 lpSupply, uint256 accRewardPerShare);
constructor(IERC20 _rewardToken, address _rewardOwner, uint256 _rewardPerBlock) public Ownable() {
rewardToken = _rewardToken;
rewardOwner = _rewardOwner;
rewardPerBlock = _rewardPerBlock;
}
function setRewardToken(IERC20 _rewardToken) public onlyOwner {
rewardToken = _rewardToken;
}
function setRewardOwner(address _rewardOwner) public onlyOwner {
rewardOwner = _rewardOwner;
}
function setRewardsPerBlock(uint256 _rewardPerBlock) public onlyOwner {
rewardPerBlock = _rewardPerBlock;
}
function poolLength() public view returns (uint256 pools) {
pools = poolInfo.length;
}
function add(uint256 allocPoint, IERC20 _lpToken) public onlyOwner {
uint256 lastRewardBlock = block.number;
totalAllocPoint = totalAllocPoint + allocPoint;
lpToken.push(_lpToken);
poolInfo.push(PoolInfo({
allocPoint: uint64(allocPoint),
lastRewardBlock: uint64(lastRewardBlock),
accRewardPerShare: 0
}));
emit LogPoolAddition(lpToken.length - 1, allocPoint, _lpToken);
}
function set(uint256 _pid, uint256 _allocPoint) public onlyOwner {
totalAllocPoint = (totalAllocPoint - poolInfo[_pid].allocPoint) + _allocPoint;
poolInfo[_pid].allocPoint = uint64(_allocPoint);
emit LogSetPool(_pid, _allocPoint);
}
function pendingRewards(uint256 _pid, address _user) external view returns (uint256 pending) {
PoolInfo memory pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][_user];
uint256 accRewardPerShare = pool.accRewardPerShare;
uint256 lpSupply = lpToken[_pid].balanceOf(address(this));
if (block.number > pool.lastRewardBlock && lpSupply != 0) {
uint256 blocks = block.number - pool.lastRewardBlock;
uint256 reward = (blocks * rewardPerBlock * pool.allocPoint) / totalAllocPoint;
accRewardPerShare = accRewardPerShare + ((reward * ACC_PRECISION) / lpSupply);
}
pending = uint256(int256((user.amount * accRewardPerShare) / ACC_PRECISION) - user.rewardDebt);
}
function massUpdatePools(uint256[] calldata pids) external {
uint256 len = pids.length;
for (uint256 i = 0; i < len; ++i) {
updatePool(pids[i]);
}
}
function updatePool(uint256 pid) public returns (PoolInfo memory pool) {
pool = poolInfo[pid];
if (block.number > pool.lastRewardBlock) {
uint256 lpSupply = lpToken[pid].balanceOf(address(this));
if (lpSupply > 0) {
uint256 blocks = block.number - pool.lastRewardBlock;
uint256 reward = (blocks * rewardPerBlock * pool.allocPoint) / totalAllocPoint;
pool.accRewardPerShare = pool.accRewardPerShare + uint128((reward * ACC_PRECISION) / lpSupply);
}
pool.lastRewardBlock = uint64(block.number);
poolInfo[pid] = pool;
emit LogUpdatePool(pid, pool.lastRewardBlock, lpSupply, pool.accRewardPerShare);
}
}
function deposit(uint256 pid, uint256 amount, address to) public {
PoolInfo memory pool = updatePool(pid);
UserInfo storage user = userInfo[pid][to];
user.amount = user.amount + amount;
user.rewardDebt = user.rewardDebt + int256((amount * pool.accRewardPerShare) / ACC_PRECISION);
lpToken[pid].safeTransferFrom(msg.sender, address(this), amount);
emit Deposit(msg.sender, pid, amount, to);
}
function withdraw(uint256 pid, uint256 amount, address to) public {
PoolInfo memory pool = updatePool(pid);
UserInfo storage user = userInfo[pid][msg.sender];
user.rewardDebt = user.rewardDebt - int256((amount * pool.accRewardPerShare) / ACC_PRECISION);
user.amount = user.amount - amount;
lpToken[pid].safeTransfer(to, amount);
emit Withdraw(msg.sender, pid, amount, to);
}
function harvest(uint256 pid, address to) public {
PoolInfo memory pool = updatePool(pid);
UserInfo storage user = userInfo[pid][msg.sender];
int256 accumulatedReward = int256((user.amount * pool.accRewardPerShare) / ACC_PRECISION);
uint256 _pendingReward = uint256(accumulatedReward - user.rewardDebt);
user.rewardDebt = accumulatedReward;
if (_pendingReward != 0) {
rewardToken.safeTransferFrom(rewardOwner, to, _pendingReward);
}
emit Harvest(msg.sender, pid, _pendingReward);
}
function withdrawAndHarvest(uint256 pid, uint256 amount, address to) public {
PoolInfo memory pool = updatePool(pid);
UserInfo storage user = userInfo[pid][msg.sender];
int256 accumulatedReward = int256((user.amount * pool.accRewardPerShare) / ACC_PRECISION);
uint256 _pendingReward = uint256(accumulatedReward - user.rewardDebt);
user.rewardDebt = accumulatedReward - int256((amount * pool.accRewardPerShare) / ACC_PRECISION);
user.amount = user.amount - amount;
rewardToken.safeTransferFrom(rewardOwner, to, _pendingReward);
lpToken[pid].safeTransfer(to, amount);
emit Withdraw(msg.sender, pid, amount, to);
emit Harvest(msg.sender, pid, _pendingReward);
}
function emergencyWithdraw(uint256 pid, address to) public {
UserInfo storage user = userInfo[pid][msg.sender];
uint256 amount = user.amount;
user.amount = 0;
user.rewardDebt = 0;
lpToken[pid].safeTransfer(to, amount);
emit EmergencyWithdraw(msg.sender, pid, amount, to);
}
function onTokenTransfer(address to, uint amount, bytes calldata _data) external override {
uint pid = 0;
require(msg.sender == address(rewardToken), "onTokenTransfer: can only be called by rewardToken");
require(msg.sender == address(lpToken[pid]), "onTokenTransfer: pool 0 needs to be a rewardToken pool");
if (amount > 0) {
PoolInfo memory pool = updatePool(pid);
UserInfo storage user = userInfo[pid][to];
user.amount = user.amount + amount;
user.rewardDebt = user.rewardDebt + int256((amount * pool.accRewardPerShare) / ACC_PRECISION);
emit Deposit(msg.sender, pid, amount, to);
}
}
}
{
"compilationTarget": {
"contracts/Staking.sol": "Staking"
},
"evmVersion": "istanbul",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": []
}
[{"inputs":[{"internalType":"contract IERC20","name":"_rewardToken","type":"address"},{"internalType":"address","name":"_rewardOwner","type":"address"},{"internalType":"uint256","name":"_rewardPerBlock","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":true,"internalType":"address","name":"to","type":"address"}],"name":"Deposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":true,"internalType":"address","name":"to","type":"address"}],"name":"EmergencyWithdraw","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Harvest","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"allocPoint","type":"uint256"},{"indexed":true,"internalType":"contract IERC20","name":"lpToken","type":"address"}],"name":"LogPoolAddition","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"allocPoint","type":"uint256"}],"name":"LogSetPool","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint64","name":"lastRewardBlock","type":"uint64"},{"indexed":false,"internalType":"uint256","name":"lpSupply","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"accRewardPerShare","type":"uint256"}],"name":"LogUpdatePool","type":"event"},{"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":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":true,"internalType":"address","name":"to","type":"address"}],"name":"Withdraw","type":"event"},{"inputs":[{"internalType":"uint256","name":"allocPoint","type":"uint256"},{"internalType":"contract IERC20","name":"_lpToken","type":"address"}],"name":"add","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"pid","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"to","type":"address"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"pid","type":"uint256"},{"internalType":"address","name":"to","type":"address"}],"name":"emergencyWithdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"pid","type":"uint256"},{"internalType":"address","name":"to","type":"address"}],"name":"harvest","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"lpToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"pids","type":"uint256[]"}],"name":"massUpdatePools","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes[]","name":"data","type":"bytes[]"}],"name":"multicall","outputs":[{"internalType":"bytes[]","name":"results","type":"bytes[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"onTokenTransfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"},{"internalType":"address","name":"_user","type":"address"}],"name":"pendingRewards","outputs":[{"internalType":"uint256","name":"pending","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"poolInfo","outputs":[{"internalType":"uint128","name":"accRewardPerShare","type":"uint128"},{"internalType":"uint64","name":"lastRewardBlock","type":"uint64"},{"internalType":"uint64","name":"allocPoint","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"poolLength","outputs":[{"internalType":"uint256","name":"pools","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"rewardOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardPerBlock","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"},{"internalType":"uint256","name":"_allocPoint","type":"uint256"}],"name":"set","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_rewardOwner","type":"address"}],"name":"setRewardOwner","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IERC20","name":"_rewardToken","type":"address"}],"name":"setRewardToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_rewardPerBlock","type":"uint256"}],"name":"setRewardsPerBlock","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"totalAllocPoint","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"pid","type":"uint256"}],"name":"updatePool","outputs":[{"components":[{"internalType":"uint128","name":"accRewardPerShare","type":"uint128"},{"internalType":"uint64","name":"lastRewardBlock","type":"uint64"},{"internalType":"uint64","name":"allocPoint","type":"uint64"}],"internalType":"struct Staking.PoolInfo","name":"pool","type":"tuple"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"","type":"address"}],"name":"userInfo","outputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"int256","name":"rewardDebt","type":"int256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"pid","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"to","type":"address"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"pid","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"to","type":"address"}],"name":"withdrawAndHarvest","outputs":[],"stateMutability":"nonpayable","type":"function"}]