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| Txn Hash | Method |
Block
|
From
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To
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Value | ||||
|---|---|---|---|---|---|---|---|---|---|
| 0x44c3d486b1ffbaf97e7954e563d7159926bc0b7b9d772ae913f39aafcac6f459 | Initialize | 472431 | 350 days 17 hrs ago | Boba Network: Deployer | IN | Boba Network: L2LiquidityPool | 0 Ether | 0.000351389 | |
| 0x95c8d9fba9965fe4e62d74e86cc34458320fedd7140265be79b9f673f8c78e0b | Initialize | 472429 | 350 days 17 hrs ago | Boba Network: Deployer | IN | Boba Network: L2LiquidityPool | 0 Ether | 0.000314957 | |
| 0xd41e963d0517ea027dbb3779921f586dc963295585089b7c0c53a71d996581f5 | 0x60806040 | 472428 | 350 days 17 hrs ago | Boba Network: Deployer | IN | Create: L2LiquidityPool | 0 Ether | 0.005887667 |
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Contract Name:
L2LiquidityPool
Compiler Version
v0.8.9+commit.e5eed63a
Optimization Enabled:
Yes with 10000 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT
pragma solidity >0.7.5;
import "./interfaces/iL1LiquidityPool.sol";
/* Library Imports */
import "@eth-optimism/contracts/contracts/libraries/bridge/CrossDomainEnabled.sol";
import "@eth-optimism/contracts/contracts/libraries/constants/Lib_PredeployAddresses.sol";
/* External Imports */
import '@openzeppelin/contracts/utils/math/SafeMath.sol';
import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';
import "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol";
import "@eth-optimism/contracts/contracts/L2/predeploys/OVM_GasPriceOracle.sol";
import "@eth-optimism/contracts/contracts/L2/messaging/L2StandardBridge.sol";
/* External Imports */
import "../standards/xL2GovernanceERC20.sol";
import "../L2BillingContract.sol";
/**
* @dev An L2 LiquidityPool implementation
*/
contract L2LiquidityPool is CrossDomainEnabled, ReentrancyGuardUpgradeable, PausableUpgradeable {
using SafeERC20 for IERC20;
using SafeMath for uint256;
/**************
* Struct *
**************/
// Info of each user.
struct UserInfo {
uint256 amount; // How many LP tokens the user has provided.
uint256 rewardDebt; // Reward debt. See explanation below.
uint256 pendingReward; // Pending reward
//
// We do some fancy math here. Basically, any point in time, the amount of rewards
// entitled to a user but is pending to be distributed is:
//
// Update Reward Per Share:
// accUserRewardPerShare = accUserRewardPerShare + (accUserReward - lastAccUserReward) / userDepositAmount
//
// LP Provider:
// Deposit:
// Case 1 (new user):
// Update Reward Per Share();
// Calculate user.rewardDebt = amount * accUserRewardPerShare;
// Case 2 (user who has already deposited add more funds):
// Update Reward Per Share();
// Calculate user.pendingReward = amount * accUserRewardPerShare - user.rewardDebt;
// Calculate user.rewardDebt = (amount + new_amount) * accUserRewardPerShare;
//
// Withdraw
// Update Reward Per Share();
// Calculate user.pendingReward = amount * accUserRewardPerShare - user.rewardDebt;
// Calculate user.rewardDebt = (amount - withdraw_amount) * accUserRewardPerShare;
}
// Info of each pool.
struct PoolInfo {
address l1TokenAddress; // Address of token contract.
address l2TokenAddress; // Address of toekn contract.
// balance
uint256 userDepositAmount; // user deposit amount;
// user rewards
uint256 lastAccUserReward; // Last accumulated user reward
uint256 accUserReward; // Accumulated user reward.
uint256 accUserRewardPerShare; // Accumulated user rewards per share, times 1e12. See below.
// owner rewards
uint256 accOwnerReward; // Accumulated owner reward.
// start time
uint256 startTime;
}
// Token batch structure
struct ClientPayToken {
address payable to;
address l2TokenAddress;
uint256 amount;
}
/*************
* Variables *
*************/
// mapping L1 and L2 token address to poolInfo
mapping(address => PoolInfo) public poolInfo;
// Info of each user that stakes tokens.
mapping(address => mapping(address => UserInfo)) public userInfo;
address public owner;
address public L1LiquidityPoolAddress;
uint256 public userRewardMinFeeRate;
uint256 public ownerRewardFeeRate;
// Default gas value which can be overridden if more complex logic runs on L1.
uint32 public DEFAULT_FINALIZE_WITHDRAWAL_L1_GAS;
uint256 private constant SAFE_GAS_STIPEND = 2300;
address public DAO;
uint256 public extraGasRelay;
uint256 public userRewardMaxFeeRate;
address public xBOBAAddress;
address public BOBAAddress;
// mapping user address to the status of xBOBA
mapping(address => bool) public xBOBAStatus;
// billing contract address
address public billingContractAddress;
/********************
* Event *
********************/
event AddLiquidity(
address sender,
uint256 amount,
address tokenAddress
);
event OwnerRecoverFee(
address sender,
address receiver,
uint256 amount,
address tokenAddress
);
event ClientDepositL2(
address sender,
uint256 receivedAmount,
address tokenAddress
);
event ClientPayL2(
address sender,
uint256 amount,
uint256 userRewardFee,
uint256 ownerRewardFee,
uint256 totalFee,
address tokenAddress
);
event ClientPayL2Settlement(
address sender,
uint256 amount,
uint256 userRewardFee,
uint256 ownerRewardFee,
uint256 totalFee,
address tokenAddress
);
event WithdrawLiquidity(
address sender,
address receiver,
uint256 amount,
address tokenAddress
);
event WithdrawReward(
address sender,
address receiver,
uint256 amount,
address tokenAddress
);
event RebalanceLP(
uint256 amount,
address tokenAddress
);
event OwnershipTransferred(
address newOwner
);
event DaoRoleTransferred(
address newDao
);
/********************************
* Constructor & Initialization *
********************************/
constructor ()
CrossDomainEnabled(address(0))
{}
/**********************
* Function Modifiers *
**********************/
modifier onlyOwner() {
require(msg.sender == owner || owner == address(0), 'Caller is not the owner');
_;
}
modifier onlyDAO() {
require(msg.sender == DAO, 'Caller is not the DAO');
_;
}
modifier onlyNotInitialized() {
require(address(L1LiquidityPoolAddress) == address(0), "Contract has been initialized");
_;
}
modifier onlyInitialized() {
require(address(L1LiquidityPoolAddress) != address(0), "Contract has not yet been initialized");
_;
}
modifier onlyWithBillingContract() {
require(billingContractAddress != address(0), "Billing contract address is not set");
_;
}
/********************
* Public Functions *
********************/
/**
* @dev transfer ownership
*
* @param _newOwner new owner of this contract
*/
function transferOwnership(
address _newOwner
)
public
onlyOwner()
{
require(_newOwner != address(0), 'New owner cannot be the zero address');
owner = _newOwner;
emit OwnershipTransferred(_newOwner);
}
/**
* @dev transfer priviledges to DAO
*
* @param _newDAO new fee setter
*/
function transferDAORole(
address _newDAO
)
public
onlyDAO()
{
require(_newDAO != address(0), 'New DAO address cannot be the zero address');
DAO = _newDAO;
emit DaoRoleTransferred(_newDAO);
}
/**
* @dev Initialize this contract.
* @param _l2CrossDomainMessenger L2 Messenger address being used for sending the cross-chain message.
* @param _L1LiquidityPoolAddress Address of the corresponding L1 LP deployed to the main chain
*/
function initialize(
address _l2CrossDomainMessenger,
address _L1LiquidityPoolAddress
)
public
onlyOwner()
onlyNotInitialized()
initializer()
{
require(_l2CrossDomainMessenger != address(0) && _L1LiquidityPoolAddress != address(0), "zero address not allowed");
messenger = _l2CrossDomainMessenger;
L1LiquidityPoolAddress = _L1LiquidityPoolAddress;
owner = msg.sender;
DAO = msg.sender;
// translates to fee rates 0.1%, 1% and 1.5% respectively
configureFee(1, 10, 15);
configureGas(100000);
__Context_init_unchained();
__Pausable_init_unchained();
__ReentrancyGuard_init_unchained();
}
/**
* @dev Configure fee of this contract.
* @dev Each fee rate is scaled by 10^3 for precision, eg- a fee rate of 50 would mean 5%
* @param _userRewardMinFeeRate minimum fee rate that users get
* @param _userRewardMaxFeeRate maximum fee rate that users get
* @param _ownerRewardFeeRate fee rate that contract owner gets
*/
function configureFee(
uint256 _userRewardMinFeeRate,
uint256 _userRewardMaxFeeRate,
uint256 _ownerRewardFeeRate
)
public
onlyDAO()
onlyInitialized()
{
require(_userRewardMinFeeRate <= _userRewardMaxFeeRate && _userRewardMinFeeRate > 0 && _userRewardMaxFeeRate <= 50 && _ownerRewardFeeRate <= 50, 'user and owner fee rates should be lower than 5 percent each');
userRewardMinFeeRate = _userRewardMinFeeRate;
userRewardMaxFeeRate = _userRewardMaxFeeRate;
ownerRewardFeeRate = _ownerRewardFeeRate;
}
/**
* @dev Configure fee of the L1LP contract
* @dev Each fee rate is scaled by 10^3 for precision, eg- a fee rate of 50 would mean 5%
* @param _userRewardMinFeeRate minimum fee rate that users get
* @param _userRewardMaxFeeRate maximum fee rate that users get
* @param _ownerRewardFeeRate fee rate that contract owner gets
*/
function configureFeeExits(
uint256 _userRewardMinFeeRate,
uint256 _userRewardMaxFeeRate,
uint256 _ownerRewardFeeRate
)
external
onlyDAO()
onlyInitialized()
{
require(_userRewardMinFeeRate <= _userRewardMaxFeeRate && _userRewardMinFeeRate > 0 && _userRewardMaxFeeRate <= 50 && _ownerRewardFeeRate <= 50, 'user and owner fee rates should be lower than 5 percent each');
bytes memory data = abi.encodeWithSelector(
iL1LiquidityPool.configureFee.selector,
_userRewardMinFeeRate,
_userRewardMaxFeeRate,
_ownerRewardFeeRate
);
// Send calldata into L1
sendCrossDomainMessage(
address(L1LiquidityPoolAddress),
getFinalizeDepositL1Gas(),
data
);
}
/**
* @dev Configure gas.
*
* @param _l1GasFee default finalized withdraw L1 Gas
*/
function configureGas(
uint32 _l1GasFee
)
public
onlyOwner()
onlyInitialized()
{
DEFAULT_FINALIZE_WITHDRAWAL_L1_GAS = _l1GasFee;
}
/**
* @dev Configure billing contract address.
*
* @param _billingContractAddress billing contract address
*/
function configureBillingContractAddress(
address _billingContractAddress
)
public
onlyOwner()
{
require(_billingContractAddress != address(0), "Billing contract address cannot be zero");
billingContractAddress = _billingContractAddress;
}
/**
* @dev Return user reward fee rate.
*
* @param _l2TokenAddress L2 token address
*/
function getUserRewardFeeRate(
address _l2TokenAddress
)
public
view
onlyInitialized()
returns (uint256 userRewardFeeRate)
{
PoolInfo storage pool = poolInfo[_l2TokenAddress];
uint256 poolLiquidity = pool.userDepositAmount;
uint256 poolBalance;
if (_l2TokenAddress == Lib_PredeployAddresses.OVM_ETH) {
poolBalance = address(this).balance;
} else {
poolBalance = IERC20(_l2TokenAddress).balanceOf(address(this));
}
if (poolBalance == 0) {
return userRewardMaxFeeRate;
} else {
uint256 poolRewardRate = userRewardMinFeeRate * poolLiquidity / poolBalance;
if (userRewardMinFeeRate > poolRewardRate) {
return userRewardMinFeeRate;
} else if (userRewardMaxFeeRate < poolRewardRate) {
return userRewardMaxFeeRate;
}
return poolRewardRate;
}
}
/***
* @dev Register BOBA tokens
*
* @param _BOBAAddress L2 BOBA address
* @param _xBOBAAddress L2 xBOBA address
*
*/
function registerBOBA (
address _BOBAAddress,
address _xBOBAAddress
)
public
onlyOwner()
{
require(BOBAAddress == address(0) && _BOBAAddress != address(0) && _xBOBAAddress != address(0), "Invalid BOBA address");
BOBAAddress = _BOBAAddress;
xBOBAAddress = _xBOBAAddress;
}
/***
* @dev Add the new token pair to the pool
* DO NOT add the same LP token more than once. Rewards will be messed up if you do.
*
* @param _l1TokenAddress
* @param _l2TokenAddress
*
*/
function registerPool (
address _l1TokenAddress,
address _l2TokenAddress
)
public
onlyOwner()
{
require(_l1TokenAddress != _l2TokenAddress, "l1 and l2 token addresses cannot be same");
require(_l2TokenAddress != address(0), "l2 token address cannot be zero address");
// use with caution, can register only once
PoolInfo storage pool = poolInfo[_l2TokenAddress];
// l2 token address equal to zero, then pair is not registered.
require(pool.l2TokenAddress == address(0), "Token Address Already Registered");
poolInfo[_l2TokenAddress] =
PoolInfo({
l1TokenAddress: _l1TokenAddress,
l2TokenAddress: _l2TokenAddress,
userDepositAmount: 0,
lastAccUserReward: 0,
accUserReward: 0,
accUserRewardPerShare: 0,
accOwnerReward: 0,
startTime: block.timestamp
});
}
/**
* @dev Overridable getter for the L1 gas limit of settling the deposit, in the case it may be
* dynamic, and the above public constant does not suffice.
*
*/
function getFinalizeDepositL1Gas()
public
view
virtual
returns(
uint32
)
{
return DEFAULT_FINALIZE_WITHDRAWAL_L1_GAS;
}
/**
* Update the user reward per share
* @param _tokenAddress Address of the target token.
*/
function updateUserRewardPerShare(
address _tokenAddress
)
public
{
PoolInfo storage pool = poolInfo[_tokenAddress];
if (pool.lastAccUserReward < pool.accUserReward) {
uint256 accUserRewardDiff = (pool.accUserReward.sub(pool.lastAccUserReward));
if (pool.userDepositAmount != 0) {
pool.accUserRewardPerShare = pool.accUserRewardPerShare.add(
accUserRewardDiff.mul(1e12).div(pool.userDepositAmount)
);
}
pool.lastAccUserReward = pool.accUserReward;
}
}
/**
* Give xBOBA to users who has already deposited liquidity
* @param _tokenAddress address of the liquidity token.
*/
function mintXBOBAForPreOwner(
address _tokenAddress
)
internal
{
if (!xBOBAStatus[msg.sender] && BOBAAddress == _tokenAddress && BOBAAddress != address(0)) {
// mint xBoba
UserInfo storage user = userInfo[_tokenAddress][msg.sender];
if (user.amount != 0) {
xL2GovernanceERC20(xBOBAAddress).mint(msg.sender, user.amount);
}
xBOBAStatus[msg.sender] = true;
}
}
/**
* Give xBOBA to users who deposit liquidity
* @param _amount boba amount that users want to deposit.
* @param _tokenAddress address of the liquidity token.
*/
function mintXBOBA(
uint256 _amount,
address _tokenAddress
)
internal
{
if (BOBAAddress == _tokenAddress && BOBAAddress != address(0)) {
// mint xBoba
xL2GovernanceERC20(xBOBAAddress).mint(msg.sender, _amount);
}
}
/**
* Burn xBOBA for users who withdraw liquidity
* @param _amount boba amount that users want to withdraw.
* @param _tokenAddress address of the liquidity token.
*/
function burnXBOBA(
uint256 _amount,
address _tokenAddress
)
internal
{
if (BOBAAddress == _tokenAddress && BOBAAddress != address(0)) {
// burn xBOBA
xL2GovernanceERC20(xBOBAAddress).burn(msg.sender, _amount);
}
}
/**
* Liquididity providers add liquidity
* @param _amount liquidity amount that users want to deposit.
* @param _tokenAddress address of the liquidity token.
*/
function addLiquidity(
uint256 _amount,
address _tokenAddress
)
external
payable
nonReentrant
whenNotPaused
{
require(msg.value != 0 || _tokenAddress != Lib_PredeployAddresses.OVM_ETH, "Either Amount Incorrect or Token Address Incorrect");
// combine to make logical XOR to avoid user error
require(!(msg.value != 0 && _tokenAddress != Lib_PredeployAddresses.OVM_ETH), "Either Amount Incorrect or Token Address Incorrect");
// check whether user sends ovm_ETH or ERC20
if (msg.value != 0) {
// override the _amount and token address
_amount = msg.value;
_tokenAddress = Lib_PredeployAddresses.OVM_ETH;
}
PoolInfo storage pool = poolInfo[_tokenAddress];
UserInfo storage user = userInfo[_tokenAddress][msg.sender];
require(pool.l2TokenAddress != address(0), "Token Address Not Registered");
// Send initial xBOBA
mintXBOBAForPreOwner(_tokenAddress);
// Update accUserRewardPerShare
updateUserRewardPerShare(_tokenAddress);
// if the user has already deposited token, we move the rewards to
// pendingReward and update the reward debet.
if (user.amount > 0) {
user.pendingReward = user.pendingReward.add(
user.amount.mul(pool.accUserRewardPerShare).div(1e12).sub(user.rewardDebt)
);
user.rewardDebt = (user.amount.add(_amount)).mul(pool.accUserRewardPerShare).div(1e12);
} else {
user.rewardDebt = _amount.mul(pool.accUserRewardPerShare).div(1e12);
}
// update amounts
user.amount = user.amount.add(_amount);
pool.userDepositAmount = pool.userDepositAmount.add(_amount);
emit AddLiquidity(
msg.sender,
_amount,
_tokenAddress
);
// transfer funds if users deposit ERC20
if (_tokenAddress != Lib_PredeployAddresses.OVM_ETH) {
IERC20(_tokenAddress).safeTransferFrom(msg.sender, address(this), _amount);
}
// xBOBA
mintXBOBA(_amount, _tokenAddress);
}
/**
* Client deposit ERC20 from their account to this contract, which then releases funds on the L1 side
* @param _amount amount that client wants to transfer.
* @param _tokenAddress L2 token address
*/
function clientDepositL2(
uint256 _amount,
address _tokenAddress
)
external
payable
whenNotPaused
onlyWithBillingContract
{
// Collect the exit fee
L2BillingContract billingContract = L2BillingContract(billingContractAddress);
IERC20(billingContract.feeTokenAddress()).safeTransferFrom(msg.sender, billingContractAddress, billingContract.exitFee());
require(msg.value != 0 || _tokenAddress != Lib_PredeployAddresses.OVM_ETH, "Either Amount Incorrect or Token Address Incorrect");
// combine to make logical XOR to avoid user error
require(!(msg.value != 0 && _tokenAddress != Lib_PredeployAddresses.OVM_ETH), "Either Amount Incorrect or Token Address Incorrect");
// check whether user sends ovm_ETH or ERC20
if (msg.value != 0) {
// override the _amount and token address
_amount = msg.value;
_tokenAddress = Lib_PredeployAddresses.OVM_ETH;
}
PoolInfo storage pool = poolInfo[_tokenAddress];
require(pool.l2TokenAddress != address(0), "Token Address Not Registered");
emit ClientDepositL2(
msg.sender,
_amount,
_tokenAddress
);
// transfer funds if users deposit ERC20
if (_tokenAddress != Lib_PredeployAddresses.OVM_ETH) {
IERC20(_tokenAddress).safeTransferFrom(msg.sender, address(this), _amount);
}
// Construct calldata for L1LiquidityPool.clientPayL1(_to, _amount, _tokenAddress)
bytes memory data = abi.encodeWithSelector(
iL1LiquidityPool.clientPayL1.selector,
msg.sender,
_amount,
pool.l1TokenAddress
);
// Send calldata into L1
sendCrossDomainMessage(
address(L1LiquidityPoolAddress),
getFinalizeDepositL1Gas(),
data
);
}
/**
* Users withdraw token from LP
* @param _amount amount to withdraw
* @param _tokenAddress L2 token address
* @param _to receiver to get the funds
*/
function withdrawLiquidity(
uint256 _amount,
address _tokenAddress,
address payable _to
)
external
whenNotPaused
{
PoolInfo storage pool = poolInfo[_tokenAddress];
UserInfo storage user = userInfo[_tokenAddress][msg.sender];
require(pool.l2TokenAddress != address(0), "Token Address Not Registered");
require(user.amount >= _amount, "Requested amount exceeds amount staked");
// Send initial xBOBA
mintXBOBAForPreOwner(_tokenAddress);
// Update accUserRewardPerShare
updateUserRewardPerShare(_tokenAddress);
// calculate all the rewards and set it as pending rewards
user.pendingReward = user.pendingReward.add(
user.amount.mul(pool.accUserRewardPerShare).div(1e12).sub(user.rewardDebt)
);
// Update the user data
user.amount = user.amount.sub(_amount);
// update reward debt
user.rewardDebt = user.amount.mul(pool.accUserRewardPerShare).div(1e12);
// update total user deposit amount
pool.userDepositAmount = pool.userDepositAmount.sub(_amount);
emit WithdrawLiquidity(
msg.sender,
_to,
_amount,
_tokenAddress
);
if (_tokenAddress != Lib_PredeployAddresses.OVM_ETH) {
IERC20(_tokenAddress).safeTransfer(_to, _amount);
} else {
(bool sent,) = _to.call{gas: SAFE_GAS_STIPEND, value: _amount}("");
require(sent, "Failed to send ovm_Eth");
}
// burn xBOBA
burnXBOBA(_amount, _tokenAddress);
}
/**
* owner recovers fee from ERC20
* @param _amount amount to transfer to the other account.
* @param _tokenAddress L2 token address
* @param _to receiver to get the fee.
*/
function ownerRecoverFee(
uint256 _amount,
address _tokenAddress,
address _to
)
external
onlyOwner()
{
PoolInfo storage pool = poolInfo[_tokenAddress];
require(pool.l2TokenAddress != address(0), "Token Address Not Registered");
require(pool.accOwnerReward >= _amount, "Requested amount exceeds reward");
pool.accOwnerReward = pool.accOwnerReward.sub(_amount);
emit OwnerRecoverFee(
msg.sender,
_to,
_amount,
_tokenAddress
);
if (_tokenAddress != Lib_PredeployAddresses.OVM_ETH) {
IERC20(_tokenAddress).safeTransfer(_to, _amount);
} else {
(bool sent,) = _to.call{gas: SAFE_GAS_STIPEND, value: _amount}("");
require(sent, "Failed to send ovm_Eth");
}
}
/**
* withdraw reward from ERC20
* @param _amount reward amount that liquidity providers want to withdraw
* @param _tokenAddress L2 token address
* @param _to receiver to get the reward
*/
function withdrawReward(
uint256 _amount,
address _tokenAddress,
address _to
)
external
whenNotPaused
{
PoolInfo storage pool = poolInfo[_tokenAddress];
UserInfo storage user = userInfo[_tokenAddress][msg.sender];
require(pool.l2TokenAddress != address(0), "Token Address Not Registered");
uint256 pendingReward = user.pendingReward.add(
user.amount.mul(pool.accUserRewardPerShare).div(1e12).sub(user.rewardDebt)
);
require(pendingReward >= _amount, "Requested amount exceeds pendingReward");
user.pendingReward = pendingReward.sub(_amount);
user.rewardDebt = user.amount.mul(pool.accUserRewardPerShare).div(1e12);
emit WithdrawReward(
msg.sender,
_to,
_amount,
_tokenAddress
);
if (_tokenAddress != Lib_PredeployAddresses.OVM_ETH) {
IERC20(_tokenAddress).safeTransfer(_to, _amount);
} else {
(bool sent,) = _to.call{gas: SAFE_GAS_STIPEND, value: _amount}("");
require(sent, "Failed to send ovm_Eth");
}
}
/*
* Rebalance LPs
* @param _amount token amount that we want to move from L2 to L1
* @param _tokenAddress L2 token address
*/
function rebalanceLP(
uint256 _amount,
address _tokenAddress
)
external
onlyOwner()
whenNotPaused()
{
require(_amount != 0, "Amount cannot be 0");
PoolInfo storage pool = poolInfo[_tokenAddress];
require(L1LiquidityPoolAddress != address(0), "L1 Liquidity Pool Not Registered");
require(pool.l2TokenAddress != address(0), "Token Address Not Registered");
if (_tokenAddress == Lib_PredeployAddresses.OVM_ETH) {
require(_amount <= address(this).balance, "Requested ETH exceeds pool balance");
L2StandardBridge(Lib_PredeployAddresses.L2_STANDARD_BRIDGE).withdrawTo(
_tokenAddress,
L1LiquidityPoolAddress,
_amount,
DEFAULT_FINALIZE_WITHDRAWAL_L1_GAS,
""
);
} else {
require(_amount <= IERC20(_tokenAddress).balanceOf(address(this)), "Requested ERC20 exceeds pool balance");
L2StandardBridge(Lib_PredeployAddresses.L2_STANDARD_BRIDGE).withdrawTo(
_tokenAddress,
L1LiquidityPoolAddress,
_amount,
DEFAULT_FINALIZE_WITHDRAWAL_L1_GAS,
""
);
}
emit RebalanceLP(
_amount,
_tokenAddress
);
}
/**
* Pause contract
*/
function pause() external onlyOwner() {
_pause();
}
/**
* UnPause contract
*/
function unpause() external onlyOwner() {
_unpause();
}
/*************************
* Cross-chain Functions *
*************************/
/**
* Move funds from L1 to L2, and pay out from the right liquidity pool
* @param _to receiver to get the funds
* @param _amount amount to to be transferred.
* @param _tokenAddress L2 token address
*/
function clientPayL2(
address payable _to,
uint256 _amount,
address _tokenAddress
)
external
onlyInitialized()
onlyFromCrossDomainAccount(address(L1LiquidityPoolAddress))
whenNotPaused
{
_initiateClientPayL2(_to, _amount, _tokenAddress);
}
/**
* Move funds in batch from L1 to L2, and pay out from the right liquidity pool
* @param _tokens tokens in batch
*/
function clientPayL2Batch(
ClientPayToken [] calldata _tokens
)
external
onlyInitialized()
onlyFromCrossDomainAccount(address(L1LiquidityPoolAddress))
whenNotPaused
{
for (uint256 i = 0; i < _tokens.length; i++) {
ClientPayToken memory token = _tokens[i];
_initiateClientPayL2(token.to, token.amount, token.l2TokenAddress);
}
}
/**
* Move funds from L1 to L2, and pay out from the right liquidity pool
* @param _to receiver to get the funds
* @param _amount amount to to be transferred.
* @param _tokenAddress L2 token address
*/
function _initiateClientPayL2(
address payable _to,
uint256 _amount,
address _tokenAddress
)
internal
{
// replyNeeded helps store the status if a message needs to be sent back to the other layer
// in case there is not enough funds to give away
bool replyNeeded = false;
PoolInfo storage pool = poolInfo[_tokenAddress];
// if this fails, relay can be attempted again after registering
require(pool.l2TokenAddress != address(0), "Token Address Not Registered");
uint256 userRewardFeeRate = getUserRewardFeeRate(_tokenAddress);
uint256 userRewardFee = (_amount.mul(userRewardFeeRate)).div(1000);
uint256 ownerRewardFee = (_amount.mul(ownerRewardFeeRate)).div(1000);
uint256 totalFee = userRewardFee.add(ownerRewardFee);
uint256 receivedAmount = _amount.sub(totalFee);
if (_tokenAddress != Lib_PredeployAddresses.OVM_ETH) {
if (receivedAmount > IERC20(_tokenAddress).balanceOf(address(this))) {
replyNeeded = true;
} else {
pool.accUserReward = pool.accUserReward.add(userRewardFee);
pool.accOwnerReward = pool.accOwnerReward.add(ownerRewardFee);
IERC20(_tokenAddress).safeTransfer(_to, receivedAmount);
}
} else {
if (receivedAmount > address(this).balance) {
replyNeeded = true;
} else {
pool.accUserReward = pool.accUserReward.add(userRewardFee);
pool.accOwnerReward = pool.accOwnerReward.add(ownerRewardFee);
//this is ovm_ETH
(bool sent,) = _to.call{gas: SAFE_GAS_STIPEND, value: receivedAmount}("");
require(sent, "Failed to send ovm_Eth");
}
}
if (replyNeeded) {
// send cross domain message
bytes memory data = abi.encodeWithSelector(
iL1LiquidityPool.clientPayL1Settlement.selector,
_to,
_amount,
pool.l1TokenAddress
);
sendCrossDomainMessage(
address(L1LiquidityPoolAddress),
getFinalizeDepositL1Gas(),
data
);
} else {
emit ClientPayL2(
_to,
receivedAmount,
userRewardFee,
ownerRewardFee,
totalFee,
_tokenAddress
);
}
}
/**
* Settlement pay when there's not enough funds on other side
* @param _to receiver to get the funds
* @param _amount amount to to be transferred.
* @param _tokenAddress L2 token address
*/
function clientPayL2Settlement(
address payable _to,
uint256 _amount,
address _tokenAddress
)
external
onlyInitialized()
onlyFromCrossDomainAccount(address(L1LiquidityPoolAddress))
whenNotPaused
{
PoolInfo storage pool = poolInfo[_tokenAddress];
uint256 userRewardFeeRate = getUserRewardFeeRate(_tokenAddress);
uint256 userRewardFee = (_amount.mul(userRewardFeeRate)).div(1000);
uint256 ownerRewardFee = (_amount.mul(ownerRewardFeeRate)).div(1000);
uint256 totalFee = userRewardFee.add(ownerRewardFee);
uint256 receivedAmount = _amount.sub(totalFee);
pool.accUserReward = pool.accUserReward.add(userRewardFee);
pool.accOwnerReward = pool.accOwnerReward.add(ownerRewardFee);
emit ClientPayL2Settlement(
_to,
receivedAmount,
userRewardFee,
ownerRewardFee,
totalFee,
_tokenAddress
);
if (_tokenAddress != Lib_PredeployAddresses.OVM_ETH) {
IERC20(_tokenAddress).safeTransfer(_to, receivedAmount);
} else {
//this is ovm_ETH
(bool sent,) = _to.call{gas: SAFE_GAS_STIPEND, value: receivedAmount}("");
require(sent, "Failed to send ovm_Eth");
}
}
}// SPDX-License-Identifier: MIT
pragma solidity >0.7.5;
pragma experimental ABIEncoderV2;
/**
* @title iL1LiquidityPool
*/
interface iL1LiquidityPool {
/********************
* Events *
********************/
event AddLiquidity(
address sender,
uint256 amount,
address tokenAddress
);
event OwnerRecoverFee(
address sender,
address receiver,
uint256 amount,
address tokenAddress
);
event ClientDepositL1(
address sender,
uint256 receivedAmount,
address tokenAddress
);
event ClientPayL1(
address sender,
uint256 amount,
uint256 userRewardFee,
uint256 ownerRewardFee,
uint256 totalFee,
address tokenAddress
);
event ClientPayL1Settlement(
address sender,
uint256 amount,
uint256 userRewardFee,
uint256 ownerRewardFee,
uint256 totalFee,
address tokenAddress
);
event WithdrawLiquidity(
address sender,
address receiver,
uint256 amount,
address tokenAddress
);
event WithdrawReward(
address sender,
address receiver,
uint256 amount,
address tokenAddress
);
/*************************
* Cross-chain Functions *
*************************/
function clientPayL1(
address payable _to,
uint256 _amount,
address _tokenAddress
)
external;
function clientPayL1Settlement(
address payable _to,
uint256 _amount,
address _tokenAddress
)
external;
function configureFee(
uint256 _userRewardMinFeeRate,
uint256 _userRewardMaxFeeRate,
uint256 _ownerRewardFeeRate
)
external;
}// SPDX-License-Identifier: MIT
pragma solidity >0.5.0 <0.9.0;
/* Interface Imports */
import { ICrossDomainMessenger } from "./ICrossDomainMessenger.sol";
/**
* @title CrossDomainEnabled
* @dev Helper contract for contracts performing cross-domain communications
*
* Compiler used: defined by inheriting contract
* Runtime target: defined by inheriting contract
*/
contract CrossDomainEnabled {
/*************
* Variables *
*************/
// Messenger contract used to send and recieve messages from the other domain.
address public messenger;
/***************
* Constructor *
***************/
/**
* @param _messenger Address of the CrossDomainMessenger on the current layer.
*/
constructor(address _messenger) {
messenger = _messenger;
}
/**********************
* Function Modifiers *
**********************/
/**
* Enforces that the modified function is only callable by a specific cross-domain account.
* @param _sourceDomainAccount The only account on the originating domain which is
* authenticated to call this function.
*/
modifier onlyFromCrossDomainAccount(address _sourceDomainAccount) {
require(
msg.sender == address(getCrossDomainMessenger()),
"OVM_XCHAIN: messenger contract unauthenticated"
);
require(
getCrossDomainMessenger().xDomainMessageSender() == _sourceDomainAccount,
"OVM_XCHAIN: wrong sender of cross-domain message"
);
_;
}
/**********************
* Internal Functions *
**********************/
/**
* Gets the messenger, usually from storage. This function is exposed in case a child contract
* needs to override.
* @return The address of the cross-domain messenger contract which should be used.
*/
function getCrossDomainMessenger() internal virtual returns (ICrossDomainMessenger) {
return ICrossDomainMessenger(messenger);
}
/**q
* Sends a message to an account on another domain
* @param _crossDomainTarget The intended recipient on the destination domain
* @param _message The data to send to the target (usually calldata to a function with
* `onlyFromCrossDomainAccount()`)
* @param _gasLimit The gasLimit for the receipt of the message on the target domain.
*/
function sendCrossDomainMessage(
address _crossDomainTarget,
uint32 _gasLimit,
bytes memory _message
) internal {
getCrossDomainMessenger().sendMessage(_crossDomainTarget, _message, _gasLimit);
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;
/**
* @title Lib_PredeployAddresses
*/
library Lib_PredeployAddresses {
// solhint-disable max-line-length
address internal constant L2_TO_L1_MESSAGE_PASSER = 0x4200000000000000000000000000000000000000;
address internal constant L1_MESSAGE_SENDER = 0x4200000000000000000000000000000000000001;
address internal constant DEPLOYER_WHITELIST = 0x4200000000000000000000000000000000000002;
address payable internal constant OVM_ETH = payable(0x4200000000000000000000000000000000000006);
// solhint-disable-next-line max-line-length
address internal constant L2_CROSS_DOMAIN_MESSENGER =
0x4200000000000000000000000000000000000007;
address internal constant LIB_ADDRESS_MANAGER = 0x4200000000000000000000000000000000000008;
address internal constant PROXY_EOA = 0x4200000000000000000000000000000000000009;
address internal constant L2_STANDARD_BRIDGE = 0x4200000000000000000000000000000000000010;
address internal constant SEQUENCER_FEE_WALLET = 0x4200000000000000000000000000000000000011;
address internal constant L2_STANDARD_TOKEN_FACTORY =
0x4200000000000000000000000000000000000012;
address internal constant L1_BLOCK_NUMBER = 0x4200000000000000000000000000000000000013;
address internal constant OVM_GAS_PRICE_ORACLE = 0x420000000000000000000000000000000000000F;
address internal constant PROXY__BOBA_TURING_PREPAY =
0x4200000000000000000000000000000000000020;
address internal constant BOBA_TURING_PREPAY = 0x4200000000000000000000000000000000000021;
address internal constant BOBA_TURING_HELPER = 0x4200000000000000000000000000000000000022;
address internal constant L2_BOBA = 0x4200000000000000000000000000000000000023;
address internal constant PROXY__BOBA_GAS_PRICE_ORACLE =
0x4200000000000000000000000000000000000024;
address internal constant BOBA_GAS_PRICE_ORACLE = 0x4200000000000000000000000000000000000025;
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @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) {
return a + b;
}
/**
* @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 a - b;
}
/**
* @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) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting 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.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../../../utils/Address.sol";
/**
* @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 IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
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));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
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'
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));
}
}
/**
* @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. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuardUpgradeable is Initializable {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
function __ReentrancyGuard_init() internal initializer {
__ReentrancyGuard_init_unchained();
}
function __ReentrancyGuard_init_unchained() internal initializer {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
uint256[49] private __gap;
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract PausableUpgradeable is Initializable, ContextUpgradeable {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
function __Pausable_init() internal initializer {
__Context_init_unchained();
__Pausable_init_unchained();
}
function __Pausable_init_unchained() internal initializer {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
uint256[49] private __gap;
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;
/* External Imports */
import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
/**
* @title OVM_GasPriceOracle
* @dev This contract exposes the current l2 gas price, a measure of how congested the network
* currently is. This measure is used by the Sequencer to determine what fee to charge for
* transactions. When the system is more congested, the l2 gas price will increase and fees
* will also increase as a result.
*
* All public variables are set while generating the initial L2 state. The
* constructor doesn't run in practice as the L2 state generation script uses
* the deployed bytecode instead of running the initcode.
*/
contract OVM_GasPriceOracle is Ownable {
/*************
* Variables *
*************/
// Current L2 gas price
uint256 public gasPrice;
// Current L1 base fee
uint256 public l1BaseFee;
// Amortized cost of batch submission per transaction
uint256 public overhead;
// Value to scale the fee up by
uint256 public scalar;
// Number of decimals of the scalar
uint256 public decimals;
/***************
* Constructor *
***************/
/**
* @param _owner Address that will initially own this contract.
*/
constructor(address _owner) Ownable() {
transferOwnership(_owner);
}
/**********
* Events *
**********/
event GasPriceUpdated(uint256);
event L1BaseFeeUpdated(uint256);
event OverheadUpdated(uint256);
event ScalarUpdated(uint256);
event DecimalsUpdated(uint256);
/********************
* Public Functions *
********************/
/**
* Allows the owner to modify the l2 gas price.
* @param _gasPrice New l2 gas price.
*/
function setGasPrice(uint256 _gasPrice) public onlyOwner {
gasPrice = _gasPrice;
emit GasPriceUpdated(_gasPrice);
}
/**
* Allows the owner to modify the l1 base fee.
* @param _baseFee New l1 base fee
*/
function setL1BaseFee(uint256 _baseFee) public onlyOwner {
l1BaseFee = _baseFee;
emit L1BaseFeeUpdated(_baseFee);
}
/**
* Allows the owner to modify the overhead.
* @param _overhead New overhead
*/
function setOverhead(uint256 _overhead) public onlyOwner {
overhead = _overhead;
emit OverheadUpdated(_overhead);
}
/**
* Allows the owner to modify the scalar.
* @param _scalar New scalar
*/
function setScalar(uint256 _scalar) public onlyOwner {
scalar = _scalar;
emit ScalarUpdated(_scalar);
}
/**
* Allows the owner to modify the decimals.
* @param _decimals New decimals
*/
function setDecimals(uint256 _decimals) public onlyOwner {
decimals = _decimals;
emit DecimalsUpdated(_decimals);
}
/**
* Computes the L1 portion of the fee
* based on the size of the RLP encoded tx
* and the current l1BaseFee
* @param _data Unsigned RLP encoded tx, 6 elements
* @return L1 fee that should be paid for the tx
*/
function getL1Fee(bytes memory _data) public view returns (uint256) {
uint256 l1GasUsed = getL1GasUsed(_data);
uint256 l1Fee = l1GasUsed * l1BaseFee;
uint256 divisor = 10**decimals;
uint256 unscaled = l1Fee * scalar;
uint256 scaled = unscaled / divisor;
return scaled;
}
/**
* Computes the extra L2 gas to cover the
* L1 security fee
* @param _data Unsigned RLP encoded tx, 6 elements
* @return L2 extra gas that should be included in the L2 gas
*/
function getExtraL2Gas(bytes memory _data) public view returns (uint256) {
return getL1Fee(_data) / gasPrice;
}
/**
* Computes the amount of L1 gas used for a transaction
* The overhead represents the per batch gas overhead of
* posting both transaction and state roots to L1 given larger
* batch sizes.
* 4 gas for 0 byte
* https://github.com/ethereum/go-ethereum/blob/
* 9ada4a2e2c415e6b0b51c50e901336872e028872/params/protocol_params.go#L33
* 16 gas for non zero byte
* https://github.com/ethereum/go-ethereum/blob/
* 9ada4a2e2c415e6b0b51c50e901336872e028872/params/protocol_params.go#L87
* This will need to be updated if calldata gas prices change
* Account for the transaction being unsigned
* Padding is added to account for lack of signature on transaction
* 1 byte for RLP V prefix
* 1 byte for V
* 1 byte for RLP R prefix
* 32 bytes for R
* 1 byte for RLP S prefix
* 32 bytes for S
* Total: 68 bytes of padding
* @param _data Unsigned RLP encoded tx, 6 elements
* @return Amount of L1 gas used for a transaction
*/
function getL1GasUsed(bytes memory _data) public view returns (uint256) {
uint256 total = 0;
for (uint256 i = 0; i < _data.length; i++) {
if (_data[i] == 0) {
total += 4;
} else {
total += 16;
}
}
uint256 unsigned = total + overhead;
return unsigned + (68 * 16);
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;
/* Interface Imports */
import { IL1StandardBridge } from "../../L1/messaging/IL1StandardBridge.sol";
import { IL1ERC20Bridge } from "../../L1/messaging/IL1ERC20Bridge.sol";
import { IL2ERC20Bridge } from "./IL2ERC20Bridge.sol";
/* Library Imports */
import { ERC165Checker } from "@openzeppelin/contracts/utils/introspection/ERC165Checker.sol";
import { CrossDomainEnabled } from "../../libraries/bridge/CrossDomainEnabled.sol";
import { Lib_PredeployAddresses } from "../../libraries/constants/Lib_PredeployAddresses.sol";
/* Contract Imports */
import { IL2StandardERC20 } from "../../standards/IL2StandardERC20.sol";
/**
* @title L2StandardBridge
* @dev The L2 Standard bridge is a contract which works together with the L1 Standard bridge to
* enable ETH and ERC20 transitions between L1 and L2.
* This contract acts as a minter for new tokens when it hears about deposits into the L1 Standard
* bridge.
* This contract also acts as a burner of the tokens intended for withdrawal, informing the L1
* bridge to release L1 funds.
*/
contract L2StandardBridge is IL2ERC20Bridge, CrossDomainEnabled {
/********************************
* External Contract References *
********************************/
address public l1TokenBridge;
/***************
* Constructor *
***************/
/**
* @param _l2CrossDomainMessenger Cross-domain messenger used by this contract.
* @param _l1TokenBridge Address of the L1 bridge deployed to the main chain.
*/
constructor(address _l2CrossDomainMessenger, address _l1TokenBridge)
CrossDomainEnabled(_l2CrossDomainMessenger)
{
l1TokenBridge = _l1TokenBridge;
}
/***************
* Withdrawing *
***************/
/**
* @inheritdoc IL2ERC20Bridge
*/
function withdraw(
address _l2Token,
uint256 _amount,
uint32 _l1Gas,
bytes calldata _data
) external virtual {
_initiateWithdrawal(_l2Token, msg.sender, msg.sender, _amount, _l1Gas, _data);
}
/**
* @inheritdoc IL2ERC20Bridge
*/
function withdrawTo(
address _l2Token,
address _to,
uint256 _amount,
uint32 _l1Gas,
bytes calldata _data
) external virtual {
_initiateWithdrawal(_l2Token, msg.sender, _to, _amount, _l1Gas, _data);
}
/**
* @dev Performs the logic for deposits by storing the token and informing the L2 token Gateway
* of the deposit.
* @param _l2Token Address of L2 token where withdrawal was initiated.
* @param _from Account to pull the deposit from on L2.
* @param _to Account to give the withdrawal to on L1.
* @param _amount Amount of the token to withdraw.
* param _l1Gas Unused, but included for potential forward compatibility considerations.
* @param _data Optional data to forward to L1. This data is provided
* solely as a convenience for external contracts. Aside from enforcing a maximum
* length, these contracts provide no guarantees about its content.
*/
function _initiateWithdrawal(
address _l2Token,
address _from,
address _to,
uint256 _amount,
uint32 _l1Gas,
bytes calldata _data
) internal {
// When a withdrawal is initiated, we burn the withdrawer's funds to prevent subsequent L2
// usage
IL2StandardERC20(_l2Token).burn(msg.sender, _amount);
// Construct calldata for l1TokenBridge.finalizeERC20Withdrawal(_to, _amount)
address l1Token = IL2StandardERC20(_l2Token).l1Token();
bytes memory message;
if (_l2Token == Lib_PredeployAddresses.OVM_ETH) {
message = abi.encodeWithSelector(
IL1StandardBridge.finalizeETHWithdrawal.selector,
_from,
_to,
_amount,
_data
);
} else {
message = abi.encodeWithSelector(
IL1ERC20Bridge.finalizeERC20Withdrawal.selector,
l1Token,
_l2Token,
_from,
_to,
_amount,
_data
);
}
// Send message up to L1 bridge
sendCrossDomainMessage(l1TokenBridge, _l1Gas, message);
emit WithdrawalInitiated(l1Token, _l2Token, msg.sender, _to, _amount, _data);
}
/************************************
* Cross-chain Function: Depositing *
************************************/
/**
* @inheritdoc IL2ERC20Bridge
*/
function finalizeDeposit(
address _l1Token,
address _l2Token,
address _from,
address _to,
uint256 _amount,
bytes calldata _data
) external virtual onlyFromCrossDomainAccount(l1TokenBridge) {
// Check the target token is compliant and
// verify the deposited token on L1 matches the L2 deposited token representation here
if (
ERC165Checker.supportsInterface(_l2Token, 0x1d1d8b63) &&
_l1Token == IL2StandardERC20(_l2Token).l1Token()
) {
// When a deposit is finalized, we credit the account on L2 with the same amount of
// tokens.
IL2StandardERC20(_l2Token).mint(_to, _amount);
emit DepositFinalized(_l1Token, _l2Token, _from, _to, _amount, _data);
} else {
// Either the L2 token which is being deposited-into disagrees about the correct address
// of its L1 token, or does not support the correct interface.
// This should only happen if there is a malicious L2 token, or if a user somehow
// specified the wrong L2 token address to deposit into.
// In either case, we stop the process here and construct a withdrawal
// message so that users can get their funds out in some cases.
// There is no way to prevent malicious token contracts altogether, but this does limit
// user error and mitigate some forms of malicious contract behavior.
bytes memory message = abi.encodeWithSelector(
IL1ERC20Bridge.finalizeERC20Withdrawal.selector,
_l1Token,
_l2Token,
_to, // switched the _to and _from here to bounce back the deposit to the sender
_from,
_amount,
_data
);
// Send message up to L1 bridge
sendCrossDomainMessage(l1TokenBridge, 0, message);
emit DepositFailed(_l1Token, _l2Token, _from, _to, _amount, _data);
}
}
}// SPDX-License-Identifier: MIT
pragma solidity >0.7.5;
import { ERC20 } from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { ERC20Permit } from "@openzeppelin/contracts/token/ERC20/extensions/draft-ERC20Permit.sol";
import { ERC20Votes } from "@openzeppelin/contracts/token/ERC20/extensions/regenesis/ERC20VotesRegenesis.sol";
import { ERC20VotesComp } from "@openzeppelin/contracts/token/ERC20/extensions/regenesis/ERC20VotesCompRegenesis.sol";
import { Address } from "@openzeppelin/contracts/utils/Address.sol";
/* External Imports */
import "@openzeppelin/contracts/security/Pausable.sol";
contract xL2GovernanceERC20 is ERC20, ERC20Permit, ERC20Votes, ERC20VotesComp, Pausable {
uint224 public constant maxSupply = 500000000e18; // 500 million BOBA
uint8 private immutable _decimals;
address public owner;
address public DAO;
mapping(address => bool) public controllers;
/**
* @param _name ERC20 name.
* @param _symbol ERC20 symbol.
*/
constructor(
string memory _name,
string memory _symbol,
uint8 decimals_
)
ERC20(_name, _symbol) ERC20Permit(_name) {
_decimals = decimals_;
owner = msg.sender;
DAO = msg.sender;
_pause();
}
modifier onlyOwner {
require(msg.sender == owner || owner == address(0), 'Caller is not the owner');
_;
}
modifier onlyDAO {
require(msg.sender == DAO, 'Caller is not the owner');
_;
}
modifier onlyController {
require(controllers[msg.sender], "Only controller can mint and burn");
_;
}
modifier onlyContract (address _address) {
require(Address.isContract(_address), "Account not contract");
_;
}
/**
* transfer ownership
*
* @param _newOwner new owner of this contract
*/
function transferOwnership(
address _newOwner
)
public
onlyOwner()
{
owner = _newOwner;
}
/**
* transfer DAO
*
* @param _newDAO new owner of this contract
*/
function transferDAO(
address _newDAO
)
public
onlyDAO()
{
DAO = _newDAO;
}
/**
* add controller
*
* @param _controller new controller of this contract
*/
function addController(
address _controller
)
public
onlyOwner()
onlyContract(_controller)
{
require(!controllers[_controller]);
controllers[_controller] = true;
}
/**
* delete controller
*
* @param _controller controller of this contract
*/
function deleteController(
address _controller
)
public
onlyOwner()
onlyContract(_controller)
{
require(controllers[_controller]);
controllers[_controller] = false;
}
/**
* Pause contract
*/
function pause() external onlyDAO() {
_pause();
}
/**
* UnPause contract
*/
function unpause() external onlyDAO() {
_unpause();
}
function decimals() public view virtual override returns (uint8) {
return _decimals;
}
function supportsInterface(bytes4 _interfaceId) public pure returns (bool) {
bytes4 firstSupportedInterface = bytes4(keccak256("supportsInterface(bytes4)")); // ERC165
return _interfaceId == firstSupportedInterface;
}
function mint(address _to, uint256 _amount) public virtual onlyController {
_mint(_to, _amount);
}
function burn(address _from, uint256 _amount) public virtual onlyController {
_burn(_from, _amount);
}
// Overrides required by Solidity
function _mint(address _to, uint256 _amount) internal override (ERC20, ERC20Votes) {
super._mint(_to, _amount);
}
function _burn(address _account, uint256 _amount) internal override (ERC20, ERC20Votes) {
super._burn(_account, _amount);
}
function transfer(address recipient, uint256 amount) public virtual whenNotPaused override (ERC20) returns (bool) {
return super.transfer(recipient, amount);
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual whenNotPaused override (ERC20) returns (bool) {
return super.transferFrom(sender, recipient, amount);
}
function approve(address spender, uint256 amount) public virtual whenNotPaused override (ERC20) returns (bool) {
return super.approve(spender, amount);
}
function increaseAllowance(address spender, uint256 addedValue) public virtual whenNotPaused override (ERC20) returns (bool) {
return super.increaseAllowance(spender, addedValue);
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual whenNotPaused override (ERC20) returns (bool) {
return super.decreaseAllowance(spender, subtractedValue);
}
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal override (ERC20, ERC20Votes) {
super._afterTokenTransfer(from, to, amount);
}
function _maxSupply() internal pure override (ERC20Votes, ERC20VotesComp) returns (uint224) {
return maxSupply;
}
}// SPDX-License-Identifier: MIT
pragma solidity >0.7.5;
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';
contract L2BillingContract {
using SafeERC20 for IERC20;
/*************
* Variables *
*************/
address public owner;
address public feeTokenAddress;
address public l2FeeWallet;
uint256 public exitFee;
/*************
* Events *
*************/
event TransferOwnership(address, address);
event UpdateExitFee(uint256);
event CollectFee(address, uint256);
event Withdraw(address, uint256);
/*************
* Modifiers *
*************/
modifier onlyNotInitialized() {
require(feeTokenAddress == address(0), "Contract has been initialized");
_;
}
modifier onlyInitialized() {
require(feeTokenAddress != address(0), "Contract has not been initialized");
_;
}
modifier onlyOwner() {
require(owner == msg.sender, "Caller is not the owner");
_;
}
/*************
* Functions *
*************/
function initialize(address _feeTokenAddress, address _l2FeeWallet, uint256 _exitFee) public onlyNotInitialized {
require(_feeTokenAddress != address(0), "Fee token address cannot be zero");
require(_l2FeeWallet != address(0), "L2 fee wallet cannot be zero");
require(_exitFee > 0, "exit fee cannot be zero");
feeTokenAddress = _feeTokenAddress;
l2FeeWallet = _l2FeeWallet;
exitFee = _exitFee;
owner = msg.sender;
}
function transferOwnership(address _newOwner) public onlyOwner {
require(_newOwner != address(0), "Ownable: new owner is the zero address");
address oldOwner = owner;
owner = _newOwner;
emit TransferOwnership(oldOwner, _newOwner);
}
function updateExitFee(uint256 _exitFee)
public
onlyOwner()
{
require(_exitFee > 0, "exit fee cannot be zero");
exitFee = _exitFee;
emit UpdateExitFee(_exitFee);
}
function collectFee() external onlyInitialized {
IERC20(feeTokenAddress).safeTransferFrom(msg.sender, address(this), exitFee);
emit CollectFee(msg.sender, exitFee);
}
function withdraw() external onlyInitialized {
uint256 balance = IERC20(feeTokenAddress).balanceOf(address(this));
require(balance >= 150e18, "Balance is too low");
IERC20(feeTokenAddress).safeTransfer(l2FeeWallet, balance);
emit Withdraw(l2FeeWallet, balance);
}
}// SPDX-License-Identifier: MIT
pragma solidity >0.5.0 <0.9.0;
/**
* @title ICrossDomainMessenger
*/
interface ICrossDomainMessenger {
/**********
* Events *
**********/
event SentMessage(
address indexed target,
address sender,
bytes message,
uint256 messageNonce,
uint256 gasLimit
);
event RelayedMessage(bytes32 indexed msgHash);
event FailedRelayedMessage(bytes32 indexed msgHash);
/*************
* Variables *
*************/
function xDomainMessageSender() external view returns (address);
/********************
* Public Functions *
********************/
/**
* Sends a cross domain message to the target messenger.
* @param _target Target contract address.
* @param _message Message to send to the target.
* @param _gasLimit Gas limit for the provided message.
*/
function sendMessage(
address _target,
bytes calldata _message,
uint32 _gasLimit
) external;
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
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);
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is 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.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @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].
*/
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");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
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");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
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);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
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);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
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);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";
/**
* @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 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.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
uint256[50] private __gap;
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @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.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* 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.
*/
abstract 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() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the 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 virtual onlyOwner {
_setOwner(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 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);
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @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 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.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}// SPDX-License-Identifier: MIT
pragma solidity >0.5.0 <0.9.0;
import "./IL1ERC20Bridge.sol";
/**
* @title IL1StandardBridge
*/
interface IL1StandardBridge is IL1ERC20Bridge {
/**********
* Events *
**********/
event ETHDepositInitiated(
address indexed _from,
address indexed _to,
uint256 _amount,
bytes _data
);
event ETHWithdrawalFinalized(
address indexed _from,
address indexed _to,
uint256 _amount,
bytes _data
);
/********************
* Public Functions *
********************/
/**
* @dev Deposit an amount of the ETH to the caller's balance on L2.
* @param _l2Gas Gas limit required to complete the deposit on L2.
* @param _data Optional data to forward to L2. This data is provided
* solely as a convenience for external contracts. Aside from enforcing a maximum
* length, these contracts provide no guarantees about its content.
*/
function depositETH(uint32 _l2Gas, bytes calldata _data) external payable;
/**
* @dev Deposit an amount of ETH to a recipient's balance on L2.
* @param _to L2 address to credit the withdrawal to.
* @param _l2Gas Gas limit required to complete the deposit on L2.
* @param _data Optional data to forward to L2. This data is provided
* solely as a convenience for external contracts. Aside from enforcing a maximum
* length, these contracts provide no guarantees about its content.
*/
function depositETHTo(
address _to,
uint32 _l2Gas,
bytes calldata _data
) external payable;
/*************************
* Cross-chain Functions *
*************************/
/**
* @dev Complete a withdrawal from L2 to L1, and credit funds to the recipient's balance of the
* L1 ETH token. Since only the xDomainMessenger can call this function, it will never be called
* before the withdrawal is finalized.
* @param _from L2 address initiating the transfer.
* @param _to L1 address to credit the withdrawal to.
* @param _amount Amount of the ERC20 to deposit.
* @param _data Optional data to forward to L2. This data is provided
* solely as a convenience for external contracts. Aside from enforcing a maximum
* length, these contracts provide no guarantees about its content.
*/
function finalizeETHWithdrawal(
address _from,
address _to,
uint256 _amount,
bytes calldata _data
) external;
}// SPDX-License-Identifier: MIT
pragma solidity >0.5.0 <0.9.0;
/**
* @title IL1ERC20Bridge
*/
interface IL1ERC20Bridge {
/**********
* Events *
**********/
event ERC20DepositInitiated(
address indexed _l1Token,
address indexed _l2Token,
address indexed _from,
address _to,
uint256 _amount,
bytes _data
);
event ERC20WithdrawalFinalized(
address indexed _l1Token,
address indexed _l2Token,
address indexed _from,
address _to,
uint256 _amount,
bytes _data
);
/********************
* Public Functions *
********************/
/**
* @dev get the address of the corresponding L2 bridge contract.
* @return Address of the corresponding L2 bridge contract.
*/
function l2TokenBridge() external returns (address);
/**
* @dev deposit an amount of the ERC20 to the caller's balance on L2.
* @param _l1Token Address of the L1 ERC20 we are depositing
* @param _l2Token Address of the L1 respective L2 ERC20
* @param _amount Amount of the ERC20 to deposit
* @param _l2Gas Gas limit required to complete the deposit on L2.
* @param _data Optional data to forward to L2. This data is provided
* solely as a convenience for external contracts. Aside from enforcing a maximum
* length, these contracts provide no guarantees about its content.
*/
function depositERC20(
address _l1Token,
address _l2Token,
uint256 _amount,
uint32 _l2Gas,
bytes calldata _data
) external;
/**
* @dev deposit an amount of ERC20 to a recipient's balance on L2.
* @param _l1Token Address of the L1 ERC20 we are depositing
* @param _l2Token Address of the L1 respective L2 ERC20
* @param _to L2 address to credit the withdrawal to.
* @param _amount Amount of the ERC20 to deposit.
* @param _l2Gas Gas limit required to complete the deposit on L2.
* @param _data Optional data to forward to L2. This data is provided
* solely as a convenience for external contracts. Aside from enforcing a maximum
* length, these contracts provide no guarantees about its content.
*/
function depositERC20To(
address _l1Token,
address _l2Token,
address _to,
uint256 _amount,
uint32 _l2Gas,
bytes calldata _data
) external;
/*************************
* Cross-chain Functions *
*************************/
/**
* @dev Complete a withdrawal from L2 to L1, and credit funds to the recipient's balance of the
* L1 ERC20 token.
* This call will fail if the initialized withdrawal from L2 has not been finalized.
*
* @param _l1Token Address of L1 token to finalizeWithdrawal for.
* @param _l2Token Address of L2 token where withdrawal was initiated.
* @param _from L2 address initiating the transfer.
* @param _to L1 address to credit the withdrawal to.
* @param _amount Amount of the ERC20 to deposit.
* @param _data Data provided by the sender on L2. This data is provided
* solely as a convenience for external contracts. Aside from enforcing a maximum
* length, these contracts provide no guarantees about its content.
*/
function finalizeERC20Withdrawal(
address _l1Token,
address _l2Token,
address _from,
address _to,
uint256 _amount,
bytes calldata _data
) external;
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;
/**
* @title IL2ERC20Bridge
*/
interface IL2ERC20Bridge {
/**********
* Events *
**********/
event WithdrawalInitiated(
address indexed _l1Token,
address indexed _l2Token,
address indexed _from,
address _to,
uint256 _amount,
bytes _data
);
event DepositFinalized(
address indexed _l1Token,
address indexed _l2Token,
address indexed _from,
address _to,
uint256 _amount,
bytes _data
);
event DepositFailed(
address indexed _l1Token,
address indexed _l2Token,
address indexed _from,
address _to,
uint256 _amount,
bytes _data
);
/********************
* Public Functions *
********************/
/**
* @dev get the address of the corresponding L1 bridge contract.
* @return Address of the corresponding L1 bridge contract.
*/
function l1TokenBridge() external returns (address);
/**
* @dev initiate a withdraw of some tokens to the caller's account on L1
* @param _l2Token Address of L2 token where withdrawal was initiated.
* @param _amount Amount of the token to withdraw.
* param _l1Gas Unused, but included for potential forward compatibility considerations.
* @param _data Optional data to forward to L1. This data is provided
* solely as a convenience for external contracts. Aside from enforcing a maximum
* length, these contracts provide no guarantees about its content.
*/
function withdraw(
address _l2Token,
uint256 _amount,
uint32 _l1Gas,
bytes calldata _data
) external;
/**
* @dev initiate a withdraw of some token to a recipient's account on L1.
* @param _l2Token Address of L2 token where withdrawal is initiated.
* @param _to L1 adress to credit the withdrawal to.
* @param _amount Amount of the token to withdraw.
* param _l1Gas Unused, but included for potential forward compatibility considerations.
* @param _data Optional data to forward to L1. This data is provided
* solely as a convenience for external contracts. Aside from enforcing a maximum
* length, these contracts provide no guarantees about its content.
*/
function withdrawTo(
address _l2Token,
address _to,
uint256 _amount,
uint32 _l1Gas,
bytes calldata _data
) external;
/*************************
* Cross-chain Functions *
*************************/
/**
* @dev Complete a deposit from L1 to L2, and credits funds to the recipient's balance of this
* L2 token. This call will fail if it did not originate from a corresponding deposit in
* L1StandardTokenBridge.
* @param _l1Token Address for the l1 token this is called with
* @param _l2Token Address for the l2 token this is called with
* @param _from Account to pull the deposit from on L2.
* @param _to Address to receive the withdrawal at
* @param _amount Amount of the token to withdraw
* @param _data Data provider by the sender on L1. This data is provided
* solely as a convenience for external contracts. Aside from enforcing a maximum
* length, these contracts provide no guarantees about its content.
*/
function finalizeDeposit(
address _l1Token,
address _l2Token,
address _from,
address _to,
uint256 _amount,
bytes calldata _data
) external;
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Library used to query support of an interface declared via {IERC165}.
*
* Note that these functions return the actual result of the query: they do not
* `revert` if an interface is not supported. It is up to the caller to decide
* what to do in these cases.
*/
library ERC165Checker {
// As per the EIP-165 spec, no interface should ever match 0xffffffff
bytes4 private constant _INTERFACE_ID_INVALID = 0xffffffff;
/**
* @dev Returns true if `account` supports the {IERC165} interface,
*/
function supportsERC165(address account) internal view returns (bool) {
// Any contract that implements ERC165 must explicitly indicate support of
// InterfaceId_ERC165 and explicitly indicate non-support of InterfaceId_Invalid
return
_supportsERC165Interface(account, type(IERC165).interfaceId) &&
!_supportsERC165Interface(account, _INTERFACE_ID_INVALID);
}
/**
* @dev Returns true if `account` supports the interface defined by
* `interfaceId`. Support for {IERC165} itself is queried automatically.
*
* See {IERC165-supportsInterface}.
*/
function supportsInterface(address account, bytes4 interfaceId) internal view returns (bool) {
// query support of both ERC165 as per the spec and support of _interfaceId
return supportsERC165(account) && _supportsERC165Interface(account, interfaceId);
}
/**
* @dev Returns a boolean array where each value corresponds to the
* interfaces passed in and whether they're supported or not. This allows
* you to batch check interfaces for a contract where your expectation
* is that some interfaces may not be supported.
*
* See {IERC165-supportsInterface}.
*
* _Available since v3.4._
*/
function getSupportedInterfaces(address account, bytes4[] memory interfaceIds)
internal
view
returns (bool[] memory)
{
// an array of booleans corresponding to interfaceIds and whether they're supported or not
bool[] memory interfaceIdsSupported = new bool[](interfaceIds.length);
// query support of ERC165 itself
if (supportsERC165(account)) {
// query support of each interface in interfaceIds
for (uint256 i = 0; i < interfaceIds.length; i++) {
interfaceIdsSupported[i] = _supportsERC165Interface(account, interfaceIds[i]);
}
}
return interfaceIdsSupported;
}
/**
* @dev Returns true if `account` supports all the interfaces defined in
* `interfaceIds`. Support for {IERC165} itself is queried automatically.
*
* Batch-querying can lead to gas savings by skipping repeated checks for
* {IERC165} support.
*
* See {IERC165-supportsInterface}.
*/
function supportsAllInterfaces(address account, bytes4[] memory interfaceIds) internal view returns (bool) {
// query support of ERC165 itself
if (!supportsERC165(account)) {
return false;
}
// query support of each interface in _interfaceIds
for (uint256 i = 0; i < interfaceIds.length; i++) {
if (!_supportsERC165Interface(account, interfaceIds[i])) {
return false;
}
}
// all interfaces supported
return true;
}
/**
* @notice Query if a contract implements an interface, does not check ERC165 support
* @param account The address of the contract to query for support of an interface
* @param interfaceId The interface identifier, as specified in ERC-165
* @return true if the contract at account indicates support of the interface with
* identifier interfaceId, false otherwise
* @dev Assumes that account contains a contract that supports ERC165, otherwise
* the behavior of this method is undefined. This precondition can be checked
* with {supportsERC165}.
* Interface identification is specified in ERC-165.
*/
function _supportsERC165Interface(address account, bytes4 interfaceId) private view returns (bool) {
bytes memory encodedParams = abi.encodeWithSelector(IERC165.supportsInterface.selector, interfaceId);
(bool success, bytes memory result) = account.staticcall{gas: 30000}(encodedParams);
if (result.length < 32) return false;
return success && abi.decode(result, (bool));
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { IERC165 } from "@openzeppelin/contracts/utils/introspection/IERC165.sol";
interface IL2StandardERC20 is IERC20, IERC165 {
function l1Token() external returns (address);
function mint(address _to, uint256 _amount) external;
function burn(address _from, uint256 _amount) external;
event Mint(address indexed _account, uint256 _amount);
event Burn(address indexed _account, uint256 _amount);
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./draft-IERC20Permit.sol";
import "../ERC20.sol";
import "../../../utils/cryptography/draft-EIP712.sol";
import "../../../utils/cryptography/ECDSA.sol";
import "../../../utils/Counters.sol";
/**
* @dev Implementation of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*
* _Available since v3.4._
*/
abstract contract ERC20Permit is ERC20, IERC20Permit, EIP712 {
using Counters for Counters.Counter;
mapping(address => Counters.Counter) private _nonces;
// solhint-disable-next-line var-name-mixedcase
bytes32 private immutable _PERMIT_TYPEHASH =
keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
/**
* @dev Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `"1"`.
*
* It's a good idea to use the same `name` that is defined as the ERC20 token name.
*/
constructor(string memory name) EIP712(name, "1") {}
/**
* @dev See {IERC20Permit-permit}.
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) public virtual override {
require(block.timestamp <= deadline, "ERC20Permit: expired deadline");
bytes32 structHash = keccak256(abi.encode(_PERMIT_TYPEHASH, owner, spender, value, _useNonce(owner), deadline));
bytes32 hash = _hashTypedDataV4(structHash);
address signer = ECDSA.recover(hash, v, r, s);
require(signer == owner, "ERC20Permit: invalid signature");
_approve(owner, spender, value);
}
/**
* @dev See {IERC20Permit-nonces}.
*/
function nonces(address owner) public view virtual override returns (uint256) {
return _nonces[owner].current();
}
/**
* @dev See {IERC20Permit-DOMAIN_SEPARATOR}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view override returns (bytes32) {
return _domainSeparatorV4();
}
/**
* @dev "Consume a nonce": return the current value and increment.
*
* _Available since v4.1._
*/
function _useNonce(address owner) internal virtual returns (uint256 current) {
Counters.Counter storage nonce = _nonces[owner];
current = nonce.current();
nonce.increment();
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../draft-ERC20Permit.sol";
import "../../../../utils/math/Math.sol";
import "../../../../utils/math/SafeCast.sol";
import "../../../../utils/cryptography/ECDSA.sol";
/**
* @dev Extension of ERC20 to support Compound-like voting and delegation. This version is more generic than Compound's,
* and supports token supply up to 2^224^ - 1, while COMP is limited to 2^96^ - 1.
*
* NOTE: If exact COMP compatibility is required, use the {ERC20VotesComp} variant of this module.
*
* This extension keeps a history (checkpoints) of each account's vote power. Vote power can be delegated either
* by calling the {delegate} function directly, or by providing a signature to be used with {delegateBySig}. Voting
* power can be queried through the public accessors {getVotes} and {getPastVotes}.
*
* By default, token balance does not account for voting power. This makes transfers cheaper. The downside is that it
* requires users to delegate to themselves in order to activate checkpoints and have their voting power tracked.
* Enabling self-delegation can easily be done by overriding the {delegates} function. Keep in mind however that this
* will significantly increase the base gas cost of transfers.
*
* _Available since v4.2._
*/
abstract contract ERC20Votes is ERC20Permit {
struct Checkpoint {
uint32 fromBlock;
uint224 votes;
}
bytes32 private constant _DELEGATION_TYPEHASH =
keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)");
mapping(address => address) private _delegates;
mapping(address => Checkpoint[]) private _checkpoints;
Checkpoint[] private _totalSupplyCheckpoints;
// for regenesis, this is cumulative, all blocks since contract
// OFFSET = current OFFSET + blocks in old chain
uint256 public constant OFFSET = 0;
/**
* @dev Emitted when an account changes their delegate.
*/
event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate);
/**
* @dev Emitted when a token transfer or delegate change results in changes to an account's voting power.
*/
event DelegateVotesChanged(address indexed delegate, uint256 previousBalance, uint256 newBalance);
/**
* @dev Get the `pos`-th checkpoint for `account`.
*/
function checkpoints(address account, uint32 pos) public view virtual returns (Checkpoint memory) {
return _checkpoints[account][pos];
}
/**
* @dev Get number of checkpoints for `account`.
*/
function numCheckpoints(address account) public view virtual returns (uint32) {
return SafeCast.toUint32(_checkpoints[account].length);
}
/**
* @dev Get the address `account` is currently delegating to.
*/
function delegates(address account) public view virtual returns (address) {
return _delegates[account];
}
/**
* @dev Gets the current votes balance for `account`
*/
function getVotes(address account) public view returns (uint256) {
uint256 pos = _checkpoints[account].length;
return pos == 0 ? 0 : _checkpoints[account][pos - 1].votes;
}
/**
* @dev Retrieve the number of votes for `account` at the end of `blockNumber`.
*
* Requirements:
*
* - `blockNumber` must have been already mined
*/
function getPastVotes(address account, uint256 blockNumber) public view returns (uint256) {
require(blockNumber < block.number, "ERC20Votes: block not yet mined");
return _checkpointsLookup(_checkpoints[account], blockNumber);
}
/**
* @dev Retrieve the `totalSupply` at the end of `blockNumber`. Note, this value is the sum of all balances.
* It is but NOT the sum of all the delegated votes!
*
* Requirements:
*
* - `blockNumber` must have been already mined
*/
function getPastTotalSupply(uint256 blockNumber) public view returns (uint256) {
require(blockNumber < block.number, "ERC20Votes: block not yet mined");
return _checkpointsLookup(_totalSupplyCheckpoints, blockNumber);
}
/**
* @dev Lookup a value in a list of (sorted) checkpoints.
*/
function _checkpointsLookup(Checkpoint[] storage ckpts, uint256 blockNumber) private view returns (uint256) {
// We run a binary search to look for the earliest checkpoint taken after `blockNumber`.
//
// During the loop, the index of the wanted checkpoint remains in the range [low-1, high).
// With each iteration, either `low` or `high` is moved towards the middle of the range to maintain the invariant.
// - If the middle checkpoint is after `blockNumber`, we look in [low, mid)
// - If the middle checkpoint is before or equal to `blockNumber`, we look in [mid+1, high)
// Once we reach a single value (when low == high), we've found the right checkpoint at the index high-1, if not
// out of bounds (in which case we're looking too far in the past and the result is 0).
// Note that if the latest checkpoint available is exactly for `blockNumber`, we end up with an index that is
// past the end of the array, so we technically don't find a checkpoint after `blockNumber`, but it works out
// the same.
blockNumber += OFFSET;
uint256 high = ckpts.length;
uint256 low = 0;
while (low < high) {
uint256 mid = Math.average(low, high);
if (ckpts[mid].fromBlock > blockNumber) {
high = mid;
} else {
low = mid + 1;
}
}
return high == 0 ? 0 : ckpts[high - 1].votes;
}
/**
* @dev Delegate votes from the sender to `delegatee`.
*/
function delegate(address delegatee) public virtual {
return _delegate(_msgSender(), delegatee);
}
/**
* @dev Delegates votes from signer to `delegatee`
*/
function delegateBySig(
address delegatee,
uint256 nonce,
uint256 expiry,
uint8 v,
bytes32 r,
bytes32 s
) public virtual {
require(block.timestamp <= expiry, "ERC20Votes: signature expired");
address signer = ECDSA.recover(
_hashTypedDataV4(keccak256(abi.encode(_DELEGATION_TYPEHASH, delegatee, nonce, expiry))),
v,
r,
s
);
require(nonce == _useNonce(signer), "ERC20Votes: invalid nonce");
return _delegate(signer, delegatee);
}
/**
* @dev Maximum token supply. Defaults to `type(uint224).max` (2^224^ - 1).
*/
function _maxSupply() internal view virtual returns (uint224) {
return type(uint224).max;
}
/**
* @dev Snapshots the totalSupply after it has been increased.
*/
function _mint(address account, uint256 amount) internal virtual override {
super._mint(account, amount);
require(totalSupply() <= _maxSupply(), "ERC20Votes: total supply risks overflowing votes");
_writeCheckpoint(_totalSupplyCheckpoints, _add, amount);
}
/**
* @dev Snapshots the totalSupply after it has been decreased.
*/
function _burn(address account, uint256 amount) internal virtual override {
super._burn(account, amount);
_writeCheckpoint(_totalSupplyCheckpoints, _subtract, amount);
}
/**
* @dev Move voting power when tokens are transferred.
*
* Emits a {DelegateVotesChanged} event.
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual override {
super._afterTokenTransfer(from, to, amount);
_moveVotingPower(delegates(from), delegates(to), amount);
}
/**
* @dev Change delegation for `delegator` to `delegatee`.
*
* Emits events {DelegateChanged} and {DelegateVotesChanged}.
*/
function _delegate(address delegator, address delegatee) internal virtual {
address currentDelegate = delegates(delegator);
uint256 delegatorBalance = balanceOf(delegator);
_delegates[delegator] = delegatee;
emit DelegateChanged(delegator, currentDelegate, delegatee);
_moveVotingPower(currentDelegate, delegatee, delegatorBalance);
}
function _moveVotingPower(
address src,
address dst,
uint256 amount
) private {
if (src != dst && amount > 0) {
if (src != address(0)) {
(uint256 oldWeight, uint256 newWeight) = _writeCheckpoint(_checkpoints[src], _subtract, amount);
emit DelegateVotesChanged(src, oldWeight, newWeight);
}
if (dst != address(0)) {
(uint256 oldWeight, uint256 newWeight) = _writeCheckpoint(_checkpoints[dst], _add, amount);
emit DelegateVotesChanged(dst, oldWeight, newWeight);
}
}
}
function _writeCheckpoint(
Checkpoint[] storage ckpts,
function(uint256, uint256) view returns (uint256) op,
uint256 delta
) private returns (uint256 oldWeight, uint256 newWeight) {
uint256 pos = ckpts.length;
oldWeight = pos == 0 ? 0 : ckpts[pos - 1].votes;
newWeight = op(oldWeight, delta);
if (pos > 0 && ckpts[pos - 1].fromBlock == block.number + OFFSET) {
ckpts[pos - 1].votes = SafeCast.toUint224(newWeight);
} else {
ckpts.push(Checkpoint({fromBlock: SafeCast.toUint32(block.number + OFFSET), votes: SafeCast.toUint224(newWeight)}));
}
}
function _add(uint256 a, uint256 b) private pure returns (uint256) {
return a + b;
}
function _subtract(uint256 a, uint256 b) private pure returns (uint256) {
return a - b;
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./ERC20VotesRegenesis.sol";
/**
* @dev Extension of ERC20 to support Compound's voting and delegation. This version exactly matches Compound's
* interface, with the drawback of only supporting supply up to (2^96^ - 1).
*
* NOTE: You should use this contract if you need exact compatibility with COMP (for example in order to use your token
* with Governor Alpha or Bravo) and if you are sure the supply cap of 2^96^ is enough for you. Otherwise, use the
* {ERC20Votes} variant of this module.
*
* This extension keeps a history (checkpoints) of each account's vote power. Vote power can be delegated either
* by calling the {delegate} function directly, or by providing a signature to be used with {delegateBySig}. Voting
* power can be queried through the public accessors {getCurrentVotes} and {getPriorVotes}.
*
* By default, token balance does not account for voting power. This makes transfers cheaper. The downside is that it
* requires users to delegate to themselves in order to activate checkpoints and have their voting power tracked.
* Enabling self-delegation can easily be done by overriding the {delegates} function. Keep in mind however that this
* will significantly increase the base gas cost of transfers.
*
* _Available since v4.2._
*/
abstract contract ERC20VotesComp is ERC20Votes {
/**
* @dev Comp version of the {getVotes} accessor, with `uint96` return type.
*/
function getCurrentVotes(address account) external view returns (uint96) {
return SafeCast.toUint96(getVotes(account));
}
/**
* @dev Comp version of the {getPastVotes} accessor, with `uint96` return type.
*/
function getPriorVotes(address account, uint256 blockNumber) external view returns (uint96) {
return SafeCast.toUint96(getPastVotes(account, blockNumber));
}
/**
* @dev Maximum token supply. Reduced to `type(uint96).max` (2^96^ - 1) to fit COMP interface.
*/
function _maxSupply() internal view virtual override returns (uint224) {
return type(uint96).max;
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC20.sol";
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./ECDSA.sol";
/**
* @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.
*
* The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible,
* thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding
* they need in their contracts using a combination of `abi.encode` and `keccak256`.
*
* This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
* scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
* ({_hashTypedDataV4}).
*
* The implementation of the domain separator was designed to be as efficient as possible while still properly updating
* the chain id to protect against replay attacks on an eventual fork of the chain.
*
* NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
* https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
*
* _Available since v3.4._
*/
abstract contract EIP712 {
/* solhint-disable var-name-mixedcase */
// Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to
// invalidate the cached domain separator if the chain id changes.
bytes32 private immutable _CACHED_DOMAIN_SEPARATOR;
uint256 private immutable _CACHED_CHAIN_ID;
bytes32 private immutable _HASHED_NAME;
bytes32 private immutable _HASHED_VERSION;
bytes32 private immutable _TYPE_HASH;
/* solhint-enable var-name-mixedcase */
/**
* @dev Initializes the domain separator and parameter caches.
*
* The meaning of `name` and `version` is specified in
* https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:
*
* - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
* - `version`: the current major version of the signing domain.
*
* NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
* contract upgrade].
*/
constructor(string memory name, string memory version) {
bytes32 hashedName = keccak256(bytes(name));
bytes32 hashedVersion = keccak256(bytes(version));
bytes32 typeHash = keccak256(
"EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
);
_HASHED_NAME = hashedName;
_HASHED_VERSION = hashedVersion;
_CACHED_CHAIN_ID = block.chainid;
_CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(typeHash, hashedName, hashedVersion);
_TYPE_HASH = typeHash;
}
/**
* @dev Returns the domain separator for the current chain.
*/
function _domainSeparatorV4() internal view returns (bytes32) {
if (block.chainid == _CACHED_CHAIN_ID) {
return _CACHED_DOMAIN_SEPARATOR;
} else {
return _buildDomainSeparator(_TYPE_HASH, _HASHED_NAME, _HASHED_VERSION);
}
}
function _buildDomainSeparator(
bytes32 typeHash,
bytes32 nameHash,
bytes32 versionHash
) private view returns (bytes32) {
return keccak256(abi.encode(typeHash, nameHash, versionHash, block.chainid, address(this)));
}
/**
* @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
* function returns the hash of the fully encoded EIP712 message for this domain.
*
* This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
*
* ```solidity
* bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
* keccak256("Mail(address to,string contents)"),
* mailTo,
* keccak256(bytes(mailContents))
* )));
* address signer = ECDSA.recover(digest, signature);
* ```
*/
function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash);
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSA {
enum RecoverError {
NoError,
InvalidSignature,
InvalidSignatureLength,
InvalidSignatureS,
InvalidSignatureV
}
function _throwError(RecoverError error) private pure {
if (error == RecoverError.NoError) {
return; // no error: do nothing
} else if (error == RecoverError.InvalidSignature) {
revert("ECDSA: invalid signature");
} else if (error == RecoverError.InvalidSignatureLength) {
revert("ECDSA: invalid signature length");
} else if (error == RecoverError.InvalidSignatureS) {
revert("ECDSA: invalid signature 's' value");
} else if (error == RecoverError.InvalidSignatureV) {
revert("ECDSA: invalid signature 'v' value");
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature` or error string. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*
* _Available since v4.3._
*/
function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
// Check the signature length
// - case 65: r,s,v signature (standard)
// - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return tryRecover(hash, v, r, s);
} else if (signature.length == 64) {
bytes32 r;
bytes32 vs;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
vs := mload(add(signature, 0x40))
}
return tryRecover(hash, r, vs);
} else {
return (address(0), RecoverError.InvalidSignatureLength);
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, signature);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address, RecoverError) {
bytes32 s;
uint8 v;
assembly {
s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
v := add(shr(255, vs), 27)
}
return tryRecover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
*
* _Available since v4.2._
*/
function recover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, r, vs);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `v`,
* `r` and `s` signature fields separately.
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address, RecoverError) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
return (address(0), RecoverError.InvalidSignatureS);
}
if (v != 27 && v != 28) {
return (address(0), RecoverError.InvalidSignatureV);
}
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
if (signer == address(0)) {
return (address(0), RecoverError.InvalidSignature);
}
return (signer, RecoverError.NoError);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function recover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, v, r, s);
_throwError(error);
return recovered;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
/**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @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.
return (a & b) + (a ^ b) / 2;
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds up instead
* of rounding down.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b - 1) / b can overflow on addition, so we distribute.
return a / b + (a % b == 0 ? 0 : 1);
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
* checks.
*
* Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
* easily result in undesired exploitation or bugs, since developers usually
* assume that overflows raise errors. `SafeCast` restores this intuition by
* reverting the transaction when such 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.
*
* Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
* all math on `uint256` and `int256` and then downcasting.
*/
library SafeCast {
/**
* @dev Returns the downcasted uint224 from uint256, reverting on
* overflow (when the input is greater than largest uint224).
*
* Counterpart to Solidity's `uint224` operator.
*
* Requirements:
*
* - input must fit into 224 bits
*/
function toUint224(uint256 value) internal pure returns (uint224) {
require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits");
return uint224(value);
}
/**
* @dev Returns the downcasted uint128 from uint256, reverting on
* overflow (when the input is greater than largest uint128).
*
* Counterpart to Solidity's `uint128` operator.
*
* Requirements:
*
* - input must fit into 128 bits
*/
function toUint128(uint256 value) internal pure returns (uint128) {
require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits");
return uint128(value);
}
/**
* @dev Returns the downcasted uint96 from uint256, reverting on
* overflow (when the input is greater than largest uint96).
*
* Counterpart to Solidity's `uint96` operator.
*
* Requirements:
*
* - input must fit into 96 bits
*/
function toUint96(uint256 value) internal pure returns (uint96) {
require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits");
return uint96(value);
}
/**
* @dev Returns the downcasted uint64 from uint256, reverting on
* overflow (when the input is greater than largest uint64).
*
* Counterpart to Solidity's `uint64` operator.
*
* Requirements:
*
* - input must fit into 64 bits
*/
function toUint64(uint256 value) internal pure returns (uint64) {
require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits");
return uint64(value);
}
/**
* @dev Returns the downcasted uint32 from uint256, reverting on
* overflow (when the input is greater than largest uint32).
*
* Counterpart to Solidity's `uint32` operator.
*
* Requirements:
*
* - input must fit into 32 bits
*/
function toUint32(uint256 value) internal pure returns (uint32) {
require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits");
return uint32(value);
}
/**
* @dev Returns the downcasted uint16 from uint256, reverting on
* overflow (when the input is greater than largest uint16).
*
* Counterpart to Solidity's `uint16` operator.
*
* Requirements:
*
* - input must fit into 16 bits
*/
function toUint16(uint256 value) internal pure returns (uint16) {
require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits");
return uint16(value);
}
/**
* @dev Returns the downcasted uint8 from uint256, reverting on
* overflow (when the input is greater than largest uint8).
*
* Counterpart to Solidity's `uint8` operator.
*
* Requirements:
*
* - input must fit into 8 bits.
*/
function toUint8(uint256 value) internal pure returns (uint8) {
require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits");
return uint8(value);
}
/**
* @dev Converts a signed int256 into an unsigned uint256.
*
* Requirements:
*
* - input must be greater than or equal to 0.
*/
function toUint256(int256 value) internal pure returns (uint256) {
require(value >= 0, "SafeCast: value must be positive");
return uint256(value);
}
/**
* @dev Returns the downcasted int128 from int256, reverting on
* overflow (when the input is less than smallest int128 or
* greater than largest int128).
*
* Counterpart to Solidity's `int128` operator.
*
* Requirements:
*
* - input must fit into 128 bits
*
* _Available since v3.1._
*/
function toInt128(int256 value) internal pure returns (int128) {
require(value >= type(int128).min && value <= type(int128).max, "SafeCast: value doesn't fit in 128 bits");
return int128(value);
}
/**
* @dev Returns the downcasted int64 from int256, reverting on
* overflow (when the input is less than smallest int64 or
* greater than largest int64).
*
* Counterpart to Solidity's `int64` operator.
*
* Requirements:
*
* - input must fit into 64 bits
*
* _Available since v3.1._
*/
function toInt64(int256 value) internal pure returns (int64) {
require(value >= type(int64).min && value <= type(int64).max, "SafeCast: value doesn't fit in 64 bits");
return int64(value);
}
/**
* @dev Returns the downcasted int32 from int256, reverting on
* overflow (when the input is less than smallest int32 or
* greater than largest int32).
*
* Counterpart to Solidity's `int32` operator.
*
* Requirements:
*
* - input must fit into 32 bits
*
* _Available since v3.1._
*/
function toInt32(int256 value) internal pure returns (int32) {
require(value >= type(int32).min && value <= type(int32).max, "SafeCast: value doesn't fit in 32 bits");
return int32(value);
}
/**
* @dev Returns the downcasted int16 from int256, reverting on
* overflow (when the input is less than smallest int16 or
* greater than largest int16).
*
* Counterpart to Solidity's `int16` operator.
*
* Requirements:
*
* - input must fit into 16 bits
*
* _Available since v3.1._
*/
function toInt16(int256 value) internal pure returns (int16) {
require(value >= type(int16).min && value <= type(int16).max, "SafeCast: value doesn't fit in 16 bits");
return int16(value);
}
/**
* @dev Returns the downcasted int8 from int256, reverting on
* overflow (when the input is less than smallest int8 or
* greater than largest int8).
*
* Counterpart to Solidity's `int8` operator.
*
* Requirements:
*
* - input must fit into 8 bits.
*
* _Available since v3.1._
*/
function toInt8(int256 value) internal pure returns (int8) {
require(value >= type(int8).min && value <= type(int8).max, "SafeCast: value doesn't fit in 8 bits");
return int8(value);
}
/**
* @dev Converts an unsigned uint256 into a signed int256.
*
* Requirements:
*
* - input must be less than or equal to maxInt256.
*/
function toInt256(uint256 value) internal pure returns (int256) {
// Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256");
return int256(value);
}
}{
"optimizer": {
"enabled": true,
"runs": 10000
},
"metadata": {
"bytecodeHash": "none",
"useLiteralContent": true
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
},
"libraries": {}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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ame":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"userInfo","outputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"rewardDebt","type":"uint256"},{"internalType":"uint256","name":"pendingReward","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"userRewardMaxFeeRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"userRewardMinFeeRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"address","name":"_tokenAddress","type":"address"},{"internalType":"address payable","name":"_to","type":"address"}],"name":"withdrawLiquidity","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"address","name":"_tokenAddress","type":"address"},{"internalType":"address","name":"_to","type":"address"}],"name":"withdrawReward","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"xBOBAAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"xBOBAStatus","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"}]Contract Creation Code
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