// This contract is part of Zellic’s smart contract dataset, which is a collection of publicly available contract code gathered as of March 2023. // SPDX-License-Identifier: UNLICENSED pragma solidity ^0.8.9; interface ILSDStorage { // Depoly status function getDeployedStatus() external view returns (bool); // Guardian function getGuardian() external view returns (address); function setGuardian(address _newAddress) external; function confirmGuardian() external; // Getters function getAddress(bytes32 _key) external view returns (address); function getUint(bytes32 _key) external view returns (uint256); function getString(bytes32 _key) external view returns (string memory); function getBytes(bytes32 _key) external view returns (bytes memory); function getBool(bytes32 _key) external view returns (bool); function getInt(bytes32 _key) external view returns (int256); function getBytes32(bytes32 _key) external view returns (bytes32); // Setters function setAddress(bytes32 _key, address _value) external; function setUint(bytes32 _key, uint256 _value) external; function setString(bytes32 _key, string calldata _value) external; function setBytes(bytes32 _key, bytes calldata _value) external; function setBool(bytes32 _key, bool _value) external; function setInt(bytes32 _key, int256 _value) external; function setBytes32(bytes32 _key, bytes32 _value) external; // Deleters function deleteAddress(bytes32 _key) external; function deleteUint(bytes32 _key) external; function deleteString(bytes32 _key) external; function deleteBytes(bytes32 _key) external; function deleteBool(bytes32 _key) external; function deleteInt(bytes32 _key) external; function deleteBytes32(bytes32 _key) external; // Arithmetic function addUint(bytes32 _key, uint256 _amount) external; function subUint(bytes32 _key, uint256 _amount) external; } /// @title Base settings / modifiers for each contract in LSD abstract contract LSDBase { // Calculate using this as the base uint256 constant calcBase = 1 ether; // Version of the contract uint8 public version; // The main storage contact where primary persistant storage is maintained ILSDStorage lsdStorage; /*** Modifiers ***********************************************************/ /** * @dev Throws if called by any sender that doesn't match a LSD network contract */ modifier onlyLSDNetworkContract() { require( getBool( keccak256(abi.encodePacked("contract.exists", msg.sender)) ), "Invalid contract" ); _; } /** * @dev Throws if called by any sender that doesn't match one of the supplied contract */ modifier onlyLSDContract( string memory _contractName, address _contractAddress ) { require( _contractAddress == getAddress( keccak256( abi.encodePacked("contract.address", _contractName) ) ), "Invalid contract" ); _; } /*** Methods **********************************************************************/ /// @dev Set the main LSD storage address constructor(ILSDStorage _lsdStorageAddress) { // Update the contract address lsdStorage = ILSDStorage(_lsdStorageAddress); } /// @dev Get the address of a network contract by name function getContractAddress(string memory _contractName) internal view returns (address) { // Get the current contract address address contractAddress = getAddress( keccak256(abi.encodePacked("contract.address", _contractName)) ); // Check it require(contractAddress != address(0x0), "Contract not found"); return contractAddress; } /// @dev Get the name of a network contract by address function getContractName(address _contractAddress) internal view returns (string memory) { // Get the contract name string memory contractName = getString( keccak256(abi.encodePacked("contract.name", _contractAddress)) ); // Check it require(bytes(contractName).length > 0, "Contract not found"); // Return return contractName; } /// @dev Get revert error message from a .call method function getRevertMsg(bytes memory _returnData) internal pure returns (string memory) { // If the _res length is less than 68, then the transaction failed silently (without a revert message) if (_returnData.length < 68) return "Transaction reverted silently"; assembly { // Slice the sighash _returnData := add(_returnData, 0x04) } return abi.decode(_returnData, (string)); // All that remains is the revert string } /*** LSD Storage Methods ********************************************************/ // Note: Uused helpers have been removed to keep contract sizes down /// @dev Storage get methods function getAddress(bytes32 _key) internal view returns (address) { return lsdStorage.getAddress(_key); } function getUint(bytes32 _key) internal view returns (uint256) { return lsdStorage.getUint(_key); } function getString(bytes32 _key) internal view returns (string memory) { return lsdStorage.getString(_key); } function getBytes(bytes32 _key) internal view returns (bytes memory) { return lsdStorage.getBytes(_key); } function getBool(bytes32 _key) internal view returns (bool) { return lsdStorage.getBool(_key); } function getInt(bytes32 _key) internal view returns (int256) { return lsdStorage.getInt(_key); } function getBytes32(bytes32 _key) internal view returns (bytes32) { return lsdStorage.getBytes32(_key); } /// @dev Storage set methods function setAddress(bytes32 _key, address _value) internal { lsdStorage.setAddress(_key, _value); } function setUint(bytes32 _key, uint256 _value) internal { lsdStorage.setUint(_key, _value); } function setString(bytes32 _key, string memory _value) internal { lsdStorage.setString(_key, _value); } function setBytes(bytes32 _key, bytes memory _value) internal { lsdStorage.setBytes(_key, _value); } function setBool(bytes32 _key, bool _value) internal { lsdStorage.setBool(_key, _value); } function setInt(bytes32 _key, int256 _value) internal { lsdStorage.setInt(_key, _value); } function setBytes32(bytes32 _key, bytes32 _value) internal { lsdStorage.setBytes32(_key, _value); } /// @dev Storage delete methods function deleteAddress(bytes32 _key) internal { lsdStorage.deleteAddress(_key); } function deleteUint(bytes32 _key) internal { lsdStorage.deleteUint(_key); } function deleteString(bytes32 _key) internal { lsdStorage.deleteString(_key); } function deleteBytes(bytes32 _key) internal { lsdStorage.deleteBytes(_key); } function deleteBool(bytes32 _key) internal { lsdStorage.deleteBool(_key); } function deleteInt(bytes32 _key) internal { lsdStorage.deleteInt(_key); } function deleteBytes32(bytes32 _key) internal { lsdStorage.deleteBytes32(_key); } /// @dev Storage arithmetic methods function addUint(bytes32 _key, uint256 _amount) internal { lsdStorage.addUint(_key, _amount); } function subUint(bytes32 _key, uint256 _amount) internal { lsdStorage.subUint(_key, _amount); } } interface ILSDVaultWithdrawer { function receiveVaultWithdrawalETH() external payable; } /** * @title Liquid staking pool * * For the high-level description of the pool operation please refer to the paper. * Pool manages withdrawal keys and fees. It receives ether submitted by users on the ETH 1 side * and stakes it via the deposit_contract.sol contract. It doesn't hold ether on it's balance, * only a small portion (buffer) of it. * It also mints new tokens for rewards generated at the ETH 2.0 side. * * At the moment withdrawals are not possible in the beacon chain and there's no workaround. * Pool will be upgraded to an actual implementation when withdrawals are enabled * (Phase 1.5 or 2 of Eth2 launch, likely late 2022 or 2023). */ interface ILido { function name() external pure returns (string memory); function symbol() external pure returns (string memory); function decimals() external pure returns (string memory); function totalSupply() external view returns (uint256); function balanceOf(address _account) external view returns (uint256); function transfer(address _recipient, uint256 _amount) external returns (bool); function allowance(address _owner, address _spender) external view returns (uint256); function approve(address _spender, uint256 _amount) external returns (bool); function transferFrom( address _sender, address _recipient, uint256 _amount ) external returns (bool); function increaseAllowance(address _spender, uint256 _addedValue) external returns (bool); function decreaseAllowance(address _spender, uint256 _subtractedValue) external returns (bool); function getTotalShares() external view returns (uint256); function sharesOf(address _account) external view returns (uint256); function getSharesByPooledEth(uint256 _ethAmount) external view returns (uint256); function getPooledEthByShares(uint256 _sharesAmount) external view returns (uint256); function transferShares(address _recipient, uint256 _sharesAmount) external returns (uint256); /** * @notice Stop pool routine operations */ function stop() external; /** * @notice Resume pool routine operations */ function resume() external; /** * @notice Stops accepting new Ether to the protocol * * @dev While accepting new Ether is stopped, calls to the `submit` function, * as well as to the default payable function, will revert. * * Emits `StakingPaused` event. */ function pauseStaking() external; /** * @notice Resumes accepting new Ether to the protocol (if `pauseStaking` was called previously) * NB: Staking could be rate-limited by imposing a limit on the stake amount * at each moment in time, see `setStakingLimit()` and `removeStakingLimit()` * * @dev Preserves staking limit if it was set previously * * Emits `StakingResumed` event */ function resumeStaking() external; /** * @notice Sets the staking rate limit * * @dev Reverts if: * - `_maxStakeLimit` == 0 * - `_maxStakeLimit` >= 2^96 * - `_maxStakeLimit` < `_stakeLimitIncreasePerBlock` * - `_maxStakeLimit` / `_stakeLimitIncreasePerBlock` >= 2^32 (only if `_stakeLimitIncreasePerBlock` != 0) * * Emits `StakingLimitSet` event * * @param _maxStakeLimit max stake limit value * @param _stakeLimitIncreasePerBlock stake limit increase per single block */ function setStakingLimit( uint256 _maxStakeLimit, uint256 _stakeLimitIncreasePerBlock ) external; /** * @notice Removes the staking rate limit * * Emits `StakingLimitRemoved` event */ function removeStakingLimit() external; /** * @notice Check staking state: whether it's paused or not */ function isStakingPaused() external view returns (bool); /** * @notice Returns how much Ether can be staked in the current block * @dev Special return values: * - 2^256 - 1 if staking is unlimited; * - 0 if staking is paused or if limit is exhausted. */ function getCurrentStakeLimit() external view returns (uint256); /** * @notice Returns full info about current stake limit params and state * @dev Might be used for the advanced integration requests. * @return isStakingPaused staking pause state (equivalent to return of isStakingPaused()) * @return isStakingLimitSet whether the stake limit is set * @return currentStakeLimit current stake limit (equivalent to return of getCurrentStakeLimit()) * @return maxStakeLimit max stake limit * @return maxStakeLimitGrowthBlocks blocks needed to restore max stake limit from the fully exhausted state * @return prevStakeLimit previously reached stake limit * @return prevStakeBlockNumber previously seen block number */ function getStakeLimitFullInfo() external view returns ( bool isStakingPaused, bool isStakingLimitSet, uint256 currentStakeLimit, uint256 maxStakeLimit, uint256 maxStakeLimitGrowthBlocks, uint256 prevStakeLimit, uint256 prevStakeBlockNumber ); event Stopped(); event Resumed(); event StakingPaused(); event StakingResumed(); event StakingLimitSet( uint256 maxStakeLimit, uint256 stakeLimitIncreasePerBlock ); event StakingLimitRemoved(); /** * @notice Set Lido protocol contracts (oracle, treasury, insurance fund). * @param _oracle oracle contract * @param _treasury treasury contract * @param _insuranceFund insurance fund contract */ function setProtocolContracts( address _oracle, address _treasury, address _insuranceFund ) external; event ProtocolContactsSet( address oracle, address treasury, address insuranceFund ); /** * @notice Set fee rate to `_feeBasisPoints` basis points. * The fees are accrued when: * - oracles report staking results (beacon chain balance increase) * - validators gain execution layer rewards (priority fees and MEV) * @param _feeBasisPoints Fee rate, in basis points */ function setFee(uint16 _feeBasisPoints) external; /** * @notice Set fee distribution * @param _treasuryFeeBasisPoints basis points go to the treasury, * @param _insuranceFeeBasisPoints basis points go to the insurance fund, * @param _operatorsFeeBasisPoints basis points go to node operators. * @dev The sum has to be 10 000. */ function setFeeDistribution( uint16 _treasuryFeeBasisPoints, uint16 _insuranceFeeBasisPoints, uint16 _operatorsFeeBasisPoints ) external; /** * @notice Returns staking rewards fee rate */ function getFee() external view returns (uint16 feeBasisPoints); /** * @notice Returns fee distribution proportion */ function getFeeDistribution() external view returns ( uint16 treasuryFeeBasisPoints, uint16 insuranceFeeBasisPoints, uint16 operatorsFeeBasisPoints ); /** * @dev burn shares */ function burnShares(address _account, uint256 _sharesAmount) external; event FeeSet(uint16 feeBasisPoints); event FeeDistributionSet( uint16 treasuryFeeBasisPoints, uint16 insuranceFeeBasisPoints, uint16 operatorsFeeBasisPoints ); /** * @notice A payable function supposed to be called only by LidoExecutionLayerRewardsVault contract * @dev We need a dedicated function because funds received by the default payable function * are treated as a user deposit */ function receiveELRewards() external payable; // The amount of ETH withdrawn from LidoExecutionLayerRewardsVault contract to Lido contract event ELRewardsReceived(uint256 amount); /** * @dev Sets limit on amount of ETH to withdraw from execution layer rewards vault per LidoOracle report * @param _limitPoints limit in basis points to amount of ETH to withdraw per LidoOracle report */ function setELRewardsWithdrawalLimit(uint16 _limitPoints) external; // Percent in basis points of total pooled ether allowed to withdraw from LidoExecutionLayerRewardsVault per LidoOracle report event ELRewardsWithdrawalLimitSet(uint256 limitPoints); /** * @notice Set credentials to withdraw ETH on ETH 2.0 side after the phase 2 is launched to `_withdrawalCredentials` * @dev Note that setWithdrawalCredentials discards all unused signing keys as the signatures are invalidated. * @param _withdrawalCredentials withdrawal credentials field as defined in the Ethereum PoS consensus specs */ function setWithdrawalCredentials(bytes32 _withdrawalCredentials) external; /** * @notice Returns current credentials to withdraw ETH on ETH 2.0 side after the phase 2 is launched */ function getWithdrawalCredentials() external view returns (bytes32); event WithdrawalCredentialsSet(bytes32 withdrawalCredentials); /** * @dev Sets the address of LidoExecutionLayerRewardsVault contract * @param _executionLayerRewardsVault Execution layer rewards vault contract address */ function setELRewardsVault(address _executionLayerRewardsVault) external; // The `executionLayerRewardsVault` was set as the execution layer rewards vault for Lido event ELRewardsVaultSet(address executionLayerRewardsVault); /** * @notice Ether on the ETH 2.0 side reported by the oracle * @param _epoch Epoch id * @param _eth2balance Balance in wei on the ETH 2.0 side */ function handleOracleReport(uint256 _epoch, uint256 _eth2balance) external; // User functions /** * @notice Adds eth to the pool * @return StETH Amount of StETH generated */ function submit(address _referral) external payable returns (uint256 StETH); // Records a deposit made by a user event Submitted(address indexed sender, uint256 amount, address referral); // The `amount` of ether was sent to the deposit_contract.deposit function event Unbuffered(uint256 amount); // Requested withdrawal of `etherAmount` to `pubkeyHash` on the ETH 2.0 side, `tokenAmount` burned by `sender`, // `sentFromBuffer` was sent on the current Ethereum side. event Withdrawal( address indexed sender, uint256 tokenAmount, uint256 sentFromBuffer, bytes32 indexed pubkeyHash, uint256 etherAmount ); // Info functions /** * @notice Gets the amount of Ether controlled by the system */ function getTotalPooledEther() external view returns (uint256); /** * @notice Gets the amount of Ether temporary buffered on this contract balance */ function getBufferedEther() external view returns (uint256); /** * @notice Returns the key values related to Beacon-side * @return depositedValidators - number of deposited validators * @return beaconValidators - number of Lido's validators visible in the Beacon state, reported by oracles * @return beaconBalance - total amount of Beacon-side Ether (sum of all the balances of Lido validators) */ function getBeaconStat() external view returns ( uint256 depositedValidators, uint256 beaconValidators, uint256 beaconBalance ); } interface IUniswapV2Router01 { function factory() external pure returns (address); function WETH() external pure returns (address); function addLiquidity( address tokenA, address tokenB, uint amountADesired, uint amountBDesired, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB, uint liquidity); function addLiquidityETH( address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external payable returns (uint amountToken, uint amountETH, uint liquidity); function removeLiquidity( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB); function removeLiquidityETH( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountToken, uint amountETH); function removeLiquidityWithPermit( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountA, uint amountB); function removeLiquidityETHWithPermit( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountToken, uint amountETH); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB); function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut); function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn); function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts); } interface IUniswapV2Router02 is IUniswapV2Router01 { function removeLiquidityETHSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountETH); function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountETH); function swapExactTokensForTokensSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; function swapExactETHForTokensSupportingFeeOnTransferTokens( uint amountOutMin, address[] calldata path, address to, uint deadline ) external payable; function swapExactTokensForETHSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; } interface ILSDLIDOVault { function depositEther() external payable; function withdrawEther(uint256 _ethAmount, address _address) external; function getStETHBalance() external view returns (uint256); function claimToken(uint256 _amount) external; function claimAll() external; function getSharesOfStETH(uint256 _ethAmount) external returns (uint256); } contract LSDLIDOVault is LSDBase, ILSDLIDOVault { // Events event EtherDeposited(string indexed by, uint256 amount, uint256 time); event EtherWithdrawn(string indexed by, uint256 amount, uint256 time); // Construct constructor(ILSDStorage _lsdStorageAddress) LSDBase(_lsdStorageAddress) { // Version version = 1; } // Accept an ETH deposit from a LSD contract // Only accepts calls from LSD contracts. function depositEther() public payable override onlyLSDContract("lsdDepositPool", msg.sender) { // Valid amount? require(msg.value > 0, "No valid amount of ETH given to deposit"); // Emit ether deposited event emit EtherDeposited("LSDDepositPool", msg.value, block.timestamp); processDeposit(); } function processDeposit() private { ILido lido = ILido(getContractAddress("lido")); lido.submit{value: msg.value}(address(this)); } function getStETHBalance() public view override returns (uint256) { ILido lido = ILido(getContractAddress("lido")); return lido.balanceOf(address(this)); } function getSharesOfStETH( uint256 _ethAmount ) public view override returns (uint256) { ILido lido = ILido(getContractAddress("lido")); return lido.getSharesByPooledEth(_ethAmount); } function withdrawEther( uint256 _ethAmount, address _address ) public override onlyLSDContract("lsdDepositPool", msg.sender) { // Calls Uniswap Functions IUniswapV2Router02 uniswapRouter = IUniswapV2Router02( getContractAddress("uniswapRouter") ); address[] memory path; path = new address[](2); path[0] = getContractAddress("lido"); path[1] = getContractAddress("weth"); uint256[] memory amounts = uniswapRouter.getAmountsIn(_ethAmount, path); ILido lido = ILido(getContractAddress("lido")); lido.approve(getContractAddress("uniswapRouter"), getStETHBalance()); require(amounts[0] <= getStETHBalance(), "Invalid Exchange"); uniswapRouter.swapTokensForExactETH( _ethAmount, amounts[0], path, _address, block.timestamp + 40 ); // Emit ether withdrawn event emit EtherWithdrawn("LSDDepositPool", _ethAmount, block.timestamp); } receive() external payable {} function claimToken( uint256 _amount ) public override onlyLSDContract("lsdDaoContract", msg.sender) { ILido lido = ILido(getContractAddress("lido")); lido.transfer(msg.sender, _amount); } function claimAll() public override onlyLSDContract("lsdDaoContract", msg.sender){ ILido lido = ILido(getContractAddress("lido")); lido.transfer(msg.sender, getStETHBalance()); } }