文件 1 的 6: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
) internal 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 6: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 3 的 6: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 6:LiquidityMining.sol
pragma solidity 0.8.6;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
contract LiquidityMining is Ownable {
using SafeERC20 for IERC20;
uint256 constant DECIMALS = 18;
uint256 constant UNITS = 10**DECIMALS;
struct UserInfo {
uint256 amount;
uint256 rewardDebt;
uint256 rewardDebtAtBlock;
}
struct PoolInfo {
IERC20 token;
uint256 tokenPerBlock;
uint256 lastRewardBlock;
uint256 acctokenPerShare;
uint256 waitForWithdraw;
}
IERC20 public tokenToken;
address public tokenLiquidityMiningWallet;
uint256 public START_BLOCK;
PoolInfo[] public poolInfo;
mapping(address => uint256) public tokenToPoolId;
mapping(uint256 => mapping(address => UserInfo)) public userInfo;
event Deposit(address indexed user, uint256 indexed poolId, uint256 amount);
event Withdraw(
address indexed user,
uint256 indexed poolId,
uint256 amount
);
event EmergencyWithdraw(
address indexed user,
uint256 indexed poolId,
uint256 amount
);
event SendTokenReward(
address indexed user,
uint256 indexed poolId,
uint256 amount
);
event TokenPerBlockSet(uint256 amount);
constructor(
address _tokenAddress,
address _tokenLiquidityMiningWallet,
uint256 _startBlock
) public {
require(_tokenAddress != address(0), "Token address should not be 0");
require(_tokenLiquidityMiningWallet != address(0), "TokenLiquidityMiningWallet address should not be 0");
tokenToken = IERC20(_tokenAddress);
tokenLiquidityMiningWallet = _tokenLiquidityMiningWallet;
START_BLOCK = _startBlock;
}
function add(
uint256 _tokenPerBlock,
IERC20 _token,
bool _withUpdate
) external onlyOwner {
require(
tokenToPoolId[address(_token)] == 0,
"Token is already in pool"
);
if (_withUpdate) {
massUpdatePools();
}
uint256 lastRewardBlock = block.number > START_BLOCK
? block.number
: START_BLOCK;
tokenToPoolId[address(_token)] = poolInfo.length + 1;
poolInfo.push(
PoolInfo({
token: _token,
tokenPerBlock: _tokenPerBlock,
lastRewardBlock: lastRewardBlock,
acctokenPerShare: 0,
waitForWithdraw: 0
})
);
}
function set(
uint256 _poolId,
uint256 _tokenPerBlock,
bool _withUpdate
) external onlyOwner {
if (_withUpdate) {
massUpdatePools();
}
poolInfo[_poolId].tokenPerBlock = _tokenPerBlock;
emit TokenPerBlockSet(_tokenPerBlock);
}
function massUpdatePools() public {
uint256 length = poolInfo.length;
for (uint256 poolId = 0; poolId < length; ++poolId) {
updatePool(poolId);
}
}
function updatePool(uint256 _poolId) public {
PoolInfo storage pool = poolInfo[_poolId];
if (block.number <= pool.lastRewardBlock) return;
uint256 poolBalance = pool.token.balanceOf(address(this));
if (poolBalance == 0) {
pool.lastRewardBlock = block.number;
return;
}
uint256 rewards = getPoolReward(
pool.lastRewardBlock,
block.number,
pool.tokenPerBlock,
pool.waitForWithdraw
);
pool.waitForWithdraw += rewards;
pool.acctokenPerShare = pool.acctokenPerShare + (rewards * UNITS/poolBalance);
pool.lastRewardBlock = block.number;
}
function getPoolReward(
uint256 _from,
uint256 _to,
uint256 _tokenPerBlock,
uint256 _waitForWithdraw
) public view returns (uint256 rewards) {
uint256 blockCount = _to - _from;
uint256 amount = blockCount*(_tokenPerBlock);
uint256 allowedToken = tokenToken.allowance(
tokenLiquidityMiningWallet,
address(this)
);
uint256 farmingBalance = tokenToken.balanceOf(tokenLiquidityMiningWallet);
allowedToken = farmingBalance < allowedToken
? farmingBalance
: allowedToken;
if(allowedToken <= _waitForWithdraw){
return 0;
}
allowedToken = allowedToken - _waitForWithdraw;
if (allowedToken < amount) {
rewards = allowedToken;
} else {
rewards = amount;
}
}
function claimReward(uint256 _poolId) external {
updatePool(_poolId);
_harvest(_poolId);
}
function deposit(uint256 _poolId, uint256 _amount) external {
require(_amount > 0, "Amount cannot be 0");
PoolInfo storage pool = poolInfo[_poolId];
UserInfo storage user = userInfo[_poolId][msg.sender];
updatePool(_poolId);
_harvest(_poolId);
if (user.amount == 0) {
user.rewardDebtAtBlock = block.number;
}
user.amount = user.amount+(_amount);
user.rewardDebt = user.amount*(pool.acctokenPerShare)/(UNITS);
emit Deposit(msg.sender, _poolId, _amount);
pool.token.safeTransferFrom(
address(msg.sender),
address(this),
_amount
);
}
function withdraw(uint256 _poolId, uint256 _amount) external {
PoolInfo storage pool = poolInfo[_poolId];
UserInfo storage user = userInfo[_poolId][msg.sender];
require(_amount > 0, "Amount cannot be 0");
updatePool(_poolId);
_harvest(_poolId);
user.amount = user.amount-(_amount);
user.rewardDebt = user.amount*(pool.acctokenPerShare)/(UNITS);
emit Withdraw(msg.sender, _poolId, _amount);
pool.token.safeTransfer(address(msg.sender), _amount);
}
function emergencyWithdraw(uint256 _poolId) external {
PoolInfo storage pool = poolInfo[_poolId];
UserInfo storage user = userInfo[_poolId][msg.sender];
uint256 amountToSend = user.amount;
user.amount = 0;
user.rewardDebt = 0;
user.rewardDebtAtBlock = 0;
emit EmergencyWithdraw(msg.sender, _poolId, amountToSend);
pool.token.safeTransfer(address(msg.sender), amountToSend);
}
function poolLength() external view returns (uint256) {
return poolInfo.length;
}
function pendingReward(uint256 _poolId, address _user)
external
view
returns (uint256)
{
PoolInfo storage pool = poolInfo[_poolId];
UserInfo storage user = userInfo[_poolId][_user];
uint256 acctokenPerShare = pool.acctokenPerShare;
uint256 poolBalance = pool.token.balanceOf(address(this));
if (block.number > pool.lastRewardBlock && poolBalance > 0) {
uint256 rewards = getPoolReward(
pool.lastRewardBlock,
block.number,
pool.tokenPerBlock,
pool.waitForWithdraw
);
acctokenPerShare = acctokenPerShare+(
rewards*(UNITS)/(poolBalance)
);
}
uint256 pending = user.amount*(acctokenPerShare)/(UNITS)-(
user.rewardDebt
);
return pending;
}
function _harvest(uint256 _poolId) internal {
PoolInfo storage pool = poolInfo[_poolId];
UserInfo storage user = userInfo[_poolId][msg.sender];
if (user.amount == 0) return;
uint256 pending = user.amount*(pool.acctokenPerShare)/(UNITS)-(user.rewardDebt);
uint256 tokenAvailable = tokenToken.balanceOf(tokenLiquidityMiningWallet);
if (pending > tokenAvailable) {
pending = tokenAvailable;
}
if (pending > 0) {
user.rewardDebtAtBlock = block.number;
user.rewardDebt = user.amount*(pool.acctokenPerShare)/(UNITS);
pool.waitForWithdraw -= pending;
emit SendTokenReward(msg.sender, _poolId, pending);
tokenToken.safeTransferFrom(
tokenLiquidityMiningWallet,
msg.sender,
pending
);
return;
}
user.rewardDebt = user.amount*(pool.acctokenPerShare)/(UNITS);
}
function changeRewardsWallet(address _address) external onlyOwner {
require(_address != address(0),"Address should not be 0");
tokenLiquidityMiningWallet = _address;
}
}
文件 5 的 6: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() {
_setOwner(_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 {
_setOwner(address(0));
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
文件 6 的 6: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");
}
}
}
{
"compilationTarget": {
"contracts/LiquidityMining.sol": "LiquidityMining"
},
"evmVersion": "berlin",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 600
},
"remappings": []
}
[{"inputs":[{"internalType":"address","name":"_tokenAddress","type":"address"},{"internalType":"address","name":"_tokenLiquidityMiningWallet","type":"address"},{"internalType":"uint256","name":"_startBlock","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"poolId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Deposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"poolId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"EmergencyWithdraw","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":"poolId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"SendTokenReward","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"TokenPerBlockSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"poolId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Withdraw","type":"event"},{"inputs":[],"name":"START_BLOCK","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenPerBlock","type":"uint256"},{"internalType":"contract IERC20","name":"_token","type":"address"},{"internalType":"bool","name":"_withUpdate","type":"bool"}],"name":"add","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_address","type":"address"}],"name":"changeRewardsWallet","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_poolId","type":"uint256"}],"name":"claimReward","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_poolId","type":"uint256"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_poolId","type":"uint256"}],"name":"emergencyWithdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_from","type":"uint256"},{"internalType":"uint256","name":"_to","type":"uint256"},{"internalType":"uint256","name":"_tokenPerBlock","type":"uint256"},{"internalType":"uint256","name":"_waitForWithdraw","type":"uint256"}],"name":"getPoolReward","outputs":[{"internalType":"uint256","name":"rewards","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"massUpdatePools","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_poolId","type":"uint256"},{"internalType":"address","name":"_user","type":"address"}],"name":"pendingReward","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"poolInfo","outputs":[{"internalType":"contract IERC20","name":"token","type":"address"},{"internalType":"uint256","name":"tokenPerBlock","type":"uint256"},{"internalType":"uint256","name":"lastRewardBlock","type":"uint256"},{"internalType":"uint256","name":"acctokenPerShare","type":"uint256"},{"internalType":"uint256","name":"waitForWithdraw","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"poolLength","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_poolId","type":"uint256"},{"internalType":"uint256","name":"_tokenPerBlock","type":"uint256"},{"internalType":"bool","name":"_withUpdate","type":"bool"}],"name":"set","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"tokenLiquidityMiningWallet","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"tokenToPoolId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"tokenToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_poolId","type":"uint256"}],"name":"updatePool","outputs":[],"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":"uint256","name":"rewardDebt","type":"uint256"},{"internalType":"uint256","name":"rewardDebtAtBlock","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_poolId","type":"uint256"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]