Contract
Contract Overview
Boba Network: Boba Gas Price Oracle
Balance:
0 Ether
EtherValue:
$0.00
My Name Tag:
Not Available, login to update
| Txn Hash | Method |
Block
|
From
|
To
|
Value | ||||
|---|---|---|---|---|---|---|---|---|---|
| 0x85e4aae7b4f1e70ca25f79761250921c3bd4891e4d7036f01e43422d38c80e48 | Use Boba As Fee ... | 540121 | 276 days 19 hrs ago | 0xbd63533abbab74e5c4da3d159708a5f1879598d5 | IN | Boba Network: Boba Gas Price Oracle | 0 Ether | 0.000222159 | |
| 0x20167055041a3716726cf2af22b4bb268115c95653e2c193e26caa2ca5996636 | Initialize | 467031 | 296 days 23 hrs ago | Boba Network: Deployer | IN | Boba Network: Boba Gas Price Oracle | 0 Ether | 0.000476706 | |
| 0x9f653c5a2268713a1c4d7f72d5e91f8e18e5e2e0f696a5b5fce6df7c92738816 | 0x60806040 | 467027 | 296 days 23 hrs ago | Boba Network: Deployer | IN | Create: Boba_GasPriceOracle | 0 Ether | 0.003054237 |
[ Download CSV Export ]
Latest 25 internal transaction
[ Download CSV Export ]
Contract Name:
Boba_GasPriceOracle
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 ^0.8.9;
/* Library Imports */
import { Lib_PredeployAddresses } from "../../libraries/constants/Lib_PredeployAddresses.sol";
import { SafeMath } from "@openzeppelin/contracts/utils/math/SafeMath.sol";
/* Contract Imports */
import { L2StandardBridge } from "../messaging/L2StandardBridge.sol";
import { L2GovernanceERC20 } from "../../standards/L2GovernanceERC20.sol";
import { OVM_GasPriceOracle } from "./OVM_GasPriceOracle.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
/* Contract Imports */
import { Address } from "@openzeppelin/contracts/utils/Address.sol";
/**
* @title Boba_GasPriceOracle
*/
contract Boba_GasPriceOracle {
using SafeERC20 for IERC20;
using SafeMath for uint256;
/*************
* Constants *
*************/
// Minimum BOBA balance that can be withdrawn in a single withdrawal.
uint256 public constant MIN_WITHDRAWAL_AMOUNT = 150e18;
/*************
* Variables *
*************/
// Owner address
address private _owner;
// Address that will hold the fees once withdrawn. Dynamically initialized within l2geth.
address public feeWallet;
// L2 Boba token address
address public l2BobaAddress;
// The maximum value of ETH and BOBA
uint256 public maxPriceRatio = 5000;
// The minimum value of ETH and BOBA
uint256 public minPriceRatio = 500;
// The price ratio of ETH and BOBA
// This price ratio considers the saving percentage of using BOBA as the fee token
uint256 public priceRatio;
// Gas price oracle address
address public gasPriceOracleAddress = 0x420000000000000000000000000000000000000F;
// Record the wallet address that wants to use boba as fee token
mapping(address => bool) public bobaFeeTokenUsers;
// Boba fee for the meta transaction
uint256 public metaTransactionFee = 3e18;
// Received ETH amount for the swap - 0.005
uint256 public receivedETHAmount = 5e15;
// Price ratio without discount
uint256 public marketPriceRatio;
/*************
* Events *
*************/
event TransferOwnership(address, address);
event UseBobaAsFeeToken(address);
event SwapBOBAForETHMetaTransaction(address);
event UseETHAsFeeToken(address);
event UpdatePriceRatio(address, uint256, uint256);
event UpdateMaxPriceRatio(address, uint256);
event UpdateMinPriceRatio(address, uint256);
event UpdateGasPriceOracleAddress(address, address);
event UpdateMetaTransactionFee(address, uint256);
event UpdateReceivedETHAmount(address, uint256);
event WithdrawBOBA(address, address);
event WithdrawETH(address, address);
/**********************
* Function Modifiers *
**********************/
modifier onlyNotInitialized() {
require(address(feeWallet) == address(0), "Contract has been initialized");
_;
}
modifier onlyOwner() {
require(msg.sender == _owner, "caller is not the owner");
_;
}
/********************
* Fall back Functions *
********************/
/**
* Receive ETH
*/
receive() external payable {}
/********************
* Public Functions *
********************/
/**
* transfer ownership
* @param _newOwner new owner address
*/
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);
}
/**
* Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* Initialize feeWallet and l2BobaAddress.
*/
function initialize(address payable _feeWallet, address _l2BobaAddress)
public
onlyNotInitialized
{
require(_feeWallet != address(0) && _l2BobaAddress != address(0));
feeWallet = _feeWallet;
l2BobaAddress = _l2BobaAddress;
// Initialize the parameters
_owner = msg.sender;
gasPriceOracleAddress = 0x420000000000000000000000000000000000000F;
metaTransactionFee = 3e18;
maxPriceRatio = 5000;
priceRatio = 2000;
minPriceRatio = 500;
marketPriceRatio = 2000;
}
/**
* Add the users that want to use BOBA as the fee token
*/
function useBobaAsFeeToken() public {
require(!Address.isContract(msg.sender), "Account not EOA");
// Users should have more than 3 BOBA
require(
L2GovernanceERC20(l2BobaAddress).balanceOf(msg.sender) >= 3e18,
"Insufficient Boba balance"
);
bobaFeeTokenUsers[msg.sender] = true;
emit UseBobaAsFeeToken(msg.sender);
}
/**
* Add the users that want to use BOBA as the fee token
* using the Meta Transaction
* NOTE: Only works for the mainnet and local testnet
*/
function swapBOBAForETHMetaTransaction(
address tokenOwner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) public {
require(!Address.isContract(tokenOwner), "Account not EOA");
require(spender == address(this), "Spender is not this contract");
uint256 totalCost = receivedETHAmount.mul(marketPriceRatio).add(metaTransactionFee);
require(value >= totalCost, "Value is not enough");
L2GovernanceERC20 bobaToken = L2GovernanceERC20(l2BobaAddress);
bobaToken.permit(tokenOwner, spender, value, deadline, v, r, s);
IERC20(l2BobaAddress).safeTransferFrom(tokenOwner, address(this), totalCost);
(bool sent, ) = address(tokenOwner).call{ value: receivedETHAmount }("");
require(sent, "Failed to send ETH");
emit SwapBOBAForETHMetaTransaction(tokenOwner);
}
/**
* Add the users that want to use ETH as the fee token
*/
function useETHAsFeeToken() public {
require(!Address.isContract(msg.sender), "Account not EOA");
// Users should have more than 0.002 ETH
require(address(msg.sender).balance >= 2e15, "Insufficient ETH balance");
bobaFeeTokenUsers[msg.sender] = false;
emit UseETHAsFeeToken(msg.sender);
}
/**
* Update the price ratio of ETH and BOBA
* @param _priceRatio the price ratio of ETH and BOBA
* @param _marketPriceRatio tha market price ratio of ETH and BOBA
*/
function updatePriceRatio(uint256 _priceRatio, uint256 _marketPriceRatio) public onlyOwner {
require(_priceRatio <= maxPriceRatio && _priceRatio >= minPriceRatio);
require(_marketPriceRatio <= maxPriceRatio && _marketPriceRatio >= minPriceRatio);
priceRatio = _priceRatio;
marketPriceRatio = _marketPriceRatio;
emit UpdatePriceRatio(owner(), _priceRatio, _marketPriceRatio);
}
/**
* Update the maximum price ratio of ETH and BOBA
* @param _maxPriceRatio the maximum price ratio of ETH and BOBA
*/
function updateMaxPriceRatio(uint256 _maxPriceRatio) public onlyOwner {
require(_maxPriceRatio >= minPriceRatio && _maxPriceRatio > 0);
maxPriceRatio = _maxPriceRatio;
emit UpdateMaxPriceRatio(owner(), _maxPriceRatio);
}
/**
* Update the minimum price ratio of ETH and BOBA
* @param _minPriceRatio the minimum price ratio of ETH and BOBA
*/
function updateMinPriceRatio(uint256 _minPriceRatio) public onlyOwner {
require(_minPriceRatio <= maxPriceRatio && _minPriceRatio > 0);
minPriceRatio = _minPriceRatio;
emit UpdateMinPriceRatio(owner(), _minPriceRatio);
}
/**
* Update the gas oracle address
* @param _gasPriceOracleAddress gas oracle address
*/
function updateGasPriceOracleAddress(address _gasPriceOracleAddress) public onlyOwner {
require(Address.isContract(_gasPriceOracleAddress), "Account is EOA");
require(_gasPriceOracleAddress != address(0));
gasPriceOracleAddress = _gasPriceOracleAddress;
emit UpdateGasPriceOracleAddress(owner(), _gasPriceOracleAddress);
}
/**
* Update the fee for the meta transaction
* @param _metaTransactionFee the fee for the meta transaction
*/
function updateMetaTransactionFee(uint256 _metaTransactionFee) public onlyOwner {
require(_metaTransactionFee > 0);
metaTransactionFee = _metaTransactionFee;
emit UpdateMetaTransactionFee(owner(), _metaTransactionFee);
}
/**
* Update the received ETH amount
* @param _receivedETHAmount the received ETH amount
*/
function updateReceivedETHAmount(uint256 _receivedETHAmount) public onlyOwner {
require(_receivedETHAmount > 1e15 && _receivedETHAmount < 10e15);
receivedETHAmount = _receivedETHAmount;
emit UpdateReceivedETHAmount(owner(), _receivedETHAmount);
}
/**
* Get the price for swapping BOBA for ETH
*/
function getBOBAForSwap() public view returns (uint256) {
return receivedETHAmount.mul(marketPriceRatio).add(metaTransactionFee);
}
/**
* Get L1 Boba fee for fee estimation
* @param _txData the data payload
*/
function getL1BobaFee(bytes memory _txData) public view returns (uint256) {
OVM_GasPriceOracle gasPriceOracleContract = OVM_GasPriceOracle(gasPriceOracleAddress);
return gasPriceOracleContract.getL1Fee(_txData) * priceRatio;
}
/**
* withdraw BOBA tokens to l1 fee wallet
*/
function withdrawBOBA() public {
require(
L2GovernanceERC20(l2BobaAddress).balanceOf(address(this)) >= MIN_WITHDRAWAL_AMOUNT,
// solhint-disable-next-line max-line-length
"Boba_GasPriceOracle: withdrawal amount must be greater than minimum withdrawal amount"
);
L2StandardBridge(Lib_PredeployAddresses.L2_STANDARD_BRIDGE).withdrawTo(
l2BobaAddress,
feeWallet,
L2GovernanceERC20(l2BobaAddress).balanceOf(address(this)),
0,
bytes("")
);
emit WithdrawBOBA(owner(), feeWallet);
}
/**
* withdraw ETH tokens to l2 fee wallet
*/
function withdrawETH() public onlyOwner {
(bool sent, ) = feeWallet.call{ value: address(this).balance }("");
require(sent, "Failed to send ETH to fee wallet");
emit WithdrawETH(owner(), feeWallet);
}
}// 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 ^0.8.9;
/* 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 { ERC20Permit } from "@openzeppelin/contracts/token/ERC20/extensions/draft-ERC20Permit.sol";
// prettier-ignore
import {ERC20Votes} from "@openzeppelin/contracts/token/ERC20/extensions/regenesis/ERC20VotesRegenesis.sol";
// prettier-ignore
import {ERC20VotesComp} from "@openzeppelin/contracts/token/ERC20/extensions/regenesis/ERC20VotesCompRegenesis.sol";
import { IL2StandardERC20 } from "./IL2StandardERC20.sol";
contract L2GovernanceERC20 is IL2StandardERC20, ERC20, ERC20Permit, ERC20Votes, ERC20VotesComp {
address public l1Token;
address public l2Bridge;
uint224 public constant maxSupply = 500000000e18; // 500 million BOBA
uint8 private immutable _decimals;
/**
* @param _l2Bridge Address of the L2 standard bridge.
* @param _l1Token Address of the corresponding L1 token.
* @param _name ERC20 name.
* @param _symbol ERC20 symbol.
*/
constructor(
address _l2Bridge,
address _l1Token,
string memory _name,
string memory _symbol,
uint8 decimals_
) ERC20(_name, _symbol) ERC20Permit(_name) {
l1Token = _l1Token;
l2Bridge = _l2Bridge;
_decimals = decimals_;
}
modifier onlyL2Bridge() {
require(msg.sender == l2Bridge, "Only L2 Bridge can mint and burn");
_;
}
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
bytes4 secondSupportedInterface = IL2StandardERC20.l1Token.selector ^
IL2StandardERC20.mint.selector ^
IL2StandardERC20.burn.selector;
return _interfaceId == firstSupportedInterface || _interfaceId == secondSupportedInterface;
}
function mint(address _to, uint256 _amount) public virtual onlyL2Bridge {
_mint(_to, _amount);
emit Mint(_to, _amount);
}
function burn(address _from, uint256 _amount) public virtual onlyL2Bridge {
_burn(_from, _amount);
emit 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 _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 ^0.8.9;
/* 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 ^0.8.0;
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;
/**
* @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 >0.5.0 <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 >0.5.0 <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;
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 >0.5.0 <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;
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 "../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 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 ^0.8.0;
/**
* @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);
}
}// 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);
}
}{
"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
[{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"","type":"address"}],"name":"SwapBOBAForETHMetaTransaction","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"","type":"address"},{"indexed":false,"internalType":"address","name":"","type":"address"}],"name":"TransferOwnership","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"","type":"address"},{"indexed":false,"internalType":"address","name":"","type":"address"}],"name":"UpdateGasPriceOracleAddress","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"","type":"address"},{"indexed":false,"internalType":"uint256","name":"","type":"uint256"}],"name":"UpdateMaxPriceRatio","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"","type":"address"},{"indexed":false,"internalType":"uint256","name":"","type":"uint256"}],"name":"UpdateMetaTransactionFee","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"","type":"address"},{"indexed":false,"internalType":"uint256","name":"","type":"uint256"}],"name":"UpdateMinPriceRatio","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"","type":"address"},{"indexed":false,"internalType":"uint256","name":"","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"","type":"uint256"}],"name":"UpdatePriceRatio","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"","type":"address"},{"indexed":false,"internalType":"uint256","name":"","type":"uint256"}],"name":"UpdateReceivedETHAmount","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"","type":"address"}],"name":"UseBobaAsFeeToken","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"","type":"address"}],"name":"UseETHAsFeeToken","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"","type":"address"},{"indexed":false,"internalType":"address","name":"","type":"address"}],"name":"WithdrawBOBA","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"","type":"address"},{"indexed":false,"internalType":"address","name":"","type":"address"}],"name":"WithdrawETH","type":"event"},{"inputs":[],"name":"MIN_WITHDRAWAL_AMOUNT","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"bobaFeeTokenUsers","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"feeWallet","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"gasPriceOracleAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getBOBAForSwap","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes","name":"_txData","type":"bytes"}],"name":"getL1BobaFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address payable","name":"_feeWallet","type":"address"},{"internalType":"address","name":"_l2BobaAddress","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"l2BobaAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"marketPriceRatio","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxPriceRatio","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"metaTransactionFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"minPriceRatio","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"priceRatio","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"receivedETHAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"tokenOwner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"swapBOBAForETHMetaTransaction","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_gasPriceOracleAddress","type":"address"}],"name":"updateGasPriceOracleAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_maxPriceRatio","type":"uint256"}],"name":"updateMaxPriceRatio","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_metaTransactionFee","type":"uint256"}],"name":"updateMetaTransactionFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_minPriceRatio","type":"uint256"}],"name":"updateMinPriceRatio","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_priceRatio","type":"uint256"},{"internalType":"uint256","name":"_marketPriceRatio","type":"uint256"}],"name":"updatePriceRatio","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_receivedETHAmount","type":"uint256"}],"name":"updateReceivedETHAmount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"useBobaAsFeeToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"useETHAsFeeToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdrawBOBA","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdrawETH","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]Contract Creation Code
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
Make sure to use the "Vote Down" button for any spammy posts, and the "Vote Up" for interesting conversations.