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Contract Name:
CurveHandler
Compiler Version
v0.8.17+commit.8df45f5f
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.17; import "SafeERC20.sol"; import "IERC20.sol"; import "ILpToken.sol"; import "ICurveHandler.sol"; import "ICurveRegistryCache.sol"; import "IWETH.sol"; import "ICurvePoolV1.sol"; import "ICurvePoolV0.sol"; import "ICurvePoolV2.sol"; import "ICurvePoolV1Eth.sol"; import "ICurvePoolV2Eth.sol"; import "IController.sol"; /// @notice This contract acts as a wrapper for depositing and removing liquidity to and from Curve pools. /// Please be aware of the following: /// - This contract accepts WETH and unwraps it for Curve pool deposits /// - This contract should only be used through delegate calls for deposits and withdrawals /// - Slippage from deposits and withdrawals is handled in the ConicPool (do not use handler elsewhere) contract CurveHandler is ICurveHandler { using SafeERC20 for IERC20; address internal constant _ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; IWETH internal constant _WETH = IWETH(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2); // Normal calls to `exchange` functions will read various state variables, resulting in // gas fees that are always in the double-digit thousand gas. // On the other hand, a reentrant call will only read a single warm variable (100 gas) // and call a contract already touched, so it will use vastly less than 5k gas. // In practice, reentrant calls appear to use ~1.5k gas while non-reentrant // calls use ~60k gas. // We are better off setting this value a little too high compared to the ~1.5k estimate // to make sure that we always prevent reentrant calls. uint256 internal constant LOCK_GAS_THRESHOLD = 5_000; // Recent factory pools are deployed using a minimal proxy pattern pointing to // 1. `0x847ee1227a9900b73aeeb3a47fac92c52fd54ed9` // 2. `0x94b4dfd9ba5865cc931195c99a2db42f3fc5d45b` // The exact bytecodes are: // 1. `0x363d3d373d3d3d363d73847ee1227a9900b73aeeb3a47fac92c52fd54ed95af43d82803e903d91602b57fd5bf3` // 2. `0x363d3d373d3d3d363d7394b4dfd9ba5865cc931195c99a2db42f3fc5d45b5af43d82803e903d91602b57fd5bf3` // that yield the following hashes, against which we can compare the result of `EXTCODEHASH` to // check whether it is from this factory or not. // This check is very local, so we do not include it in the `CurveRegistryCache`. // Note that other pools may have `price_oracle` that do not check for reentrancy, so we cannot // rely on this check for any pool with the `price_oracle` function. // We only include the hash codes of pools created through factories, because // the bytecode is otherwise slightly different for each pool // Since this is only an optimization for gas purposes, we choose to make this constant, // even if that means that we might miss this optimization for new factories deployed later. bytes32 internal constant ETH_FACTORY_POOL_CODE_HASH_1 = 0x9e28a09452d2354fc4e15e3244dde27cbc4d52f12a10b91f2ca755b672bfa9be; bytes32 internal constant ETH_FACTORY_POOL_CODE_HASH_2 = 0x3429b8decaf6b79a2721e434f60c3c47b9961fdba16eb6ac6c50d3690ac25276; IController internal immutable controller; constructor(address controller_) { controller = IController(controller_); } /// @notice Deposits single sided liquidity into a Curve pool /// @dev This supports both v1 and v2 (crypto) pools. /// @param _curvePool Curve pool to deposit into /// @param _token Asset to deposit /// @param _amount Amount of asset to deposit function deposit(address _curvePool, address _token, uint256 _amount) public override { ICurveRegistryCache registry_ = controller.curveRegistryCache(); bool isETH = _isETH(_curvePool, _token); if (!registry_.hasCoinDirectly(_curvePool, isETH ? _ETH_ADDRESS : _token)) { address intermediate = registry_.basePool(_curvePool); require(intermediate != address(0), "CurveHandler: intermediate not found"); address lpToken = registry_.lpToken(intermediate); uint256 balanceBefore = ILpToken(lpToken).balanceOf(address(this)); _addLiquidity(intermediate, _amount, _token); _token = lpToken; _amount = ILpToken(_token).balanceOf(address(this)) - balanceBefore; } _addLiquidity(_curvePool, _amount, _token); } /// @notice Withdraws single sided liquidity from a Curve pool /// @param _curvePool Curve pool to withdraw from /// @param _token Underlying asset to withdraw /// @param _amount Amount of Curve LP tokens to withdraw function withdraw(address _curvePool, address _token, uint256 _amount) external override { ICurveRegistryCache registry_ = controller.curveRegistryCache(); bool isETH = _isETH(_curvePool, _token); if (!registry_.hasCoinDirectly(_curvePool, isETH ? _ETH_ADDRESS : _token)) { address intermediate = registry_.basePool(_curvePool); require(intermediate != address(0), "CurveHandler: intermediate not found"); address lpToken = registry_.lpToken(intermediate); uint256 balanceBefore = ILpToken(lpToken).balanceOf(address(this)); _removeLiquidity(_curvePool, _amount, lpToken); _curvePool = intermediate; _amount = ILpToken(lpToken).balanceOf(address(this)) - balanceBefore; } _removeLiquidity(_curvePool, _amount, _token); } function isReentrantCall(address _curvePool) public override returns (bool) { // In this version, curve pools have a price oracle that has a reentrancy lock // so this call will only succeed if we are not in a reentrant call // This is cheaper than trying to do an exchange bytes32 codeHash = _curvePool.codehash; if (codeHash == ETH_FACTORY_POOL_CODE_HASH_1 || codeHash == ETH_FACTORY_POOL_CODE_HASH_2) { try ICurvePoolV2Eth(_curvePool).price_oracle() { return false; } catch { return true; } } uint256 interfaceVersion_ = controller.curveRegistryCache().interfaceVersion(_curvePool); bool ethIndexFirst_ = _isEthIndexFirst(_curvePool); // If we don't have any other way to check for reentrancy, we try to do a swap // with 0 amount, which can behave in 3 ways depending on the state and the pool: // 1. If it succeeds, there was definitely no lock in place, so the call is not reentrant // 2. If it fails, it can fail in 2 ways: // a. It fails because some pools do not allow to swap 0 amount. This also means that the call is non-reentrant // b. It fails because there is a reentrancy lock in place, which means that the call is reentrant // Checking for case 1 is trivial. For case 2a vs 2b, we check the amount of gas consumed by the call. // Some more details about the values are given in the comments of `LOCK_GAS_THRESHOLD` uint256 gasUsed; uint256 currentGasLeft = gasleft(); if (interfaceVersion_ == 2) { try ICurvePoolV2Eth(_curvePool).exchange( ethIndexFirst_ ? uint256(0) : uint256(1), ethIndexFirst_ ? uint256(1) : uint256(0), uint256(0), uint256(0) ) { return false; } catch { gasUsed = currentGasLeft - gasleft(); } } else { try ICurvePoolV1Eth(_curvePool).exchange( ethIndexFirst_ ? int128(0) : int128(1), ethIndexFirst_ ? int128(1) : int128(0), uint256(0), uint256(0) ) { return false; } catch { gasUsed = currentGasLeft - gasleft(); } } return gasUsed < LOCK_GAS_THRESHOLD; } /// @notice Validates if a given Curve pool is currently in reentrancy /// @dev Reverts if it is in reentrancy /// @param _curvePool Curve pool to validate function reentrancyCheck(address _curvePool) external override { require(!isReentrantCall(_curvePool), "CurveHandler: reentrant call"); } function _removeLiquidity( address _curvePool, uint256 _amount, // Curve LP token amount address _token // underlying asset to withdraw ) internal { bool isETH = _isETH(_curvePool, _token); int128 index = controller.curveRegistryCache().coinIndex( _curvePool, isETH ? _ETH_ADDRESS : _token ); uint256 balanceBeforeWithdraw = address(this).balance; uint256 interfaceVersion_ = controller.curveRegistryCache().interfaceVersion(_curvePool); if (interfaceVersion_ == 0) { _version_0_remove_liquidity_one_coin(_curvePool, _amount, index); } else if (interfaceVersion_ == 1) { ICurvePoolV1(_curvePool).remove_liquidity_one_coin(_amount, index, 0); } else if (interfaceVersion_ == 2) { ICurvePoolV2(_curvePool).remove_liquidity_one_coin( _amount, uint256(uint128(index)), 0, isETH, address(this) ); } else { revert("CurveHandler: unsupported interface version"); } if (isETH) { uint256 balanceIncrease = address(this).balance - balanceBeforeWithdraw; _wrapWETH(balanceIncrease); } } /// Version 0 pools don't have a `remove_liquidity_one_coin` function. /// So we work around this by calling `removing_liquidity` /// and then swapping all the coins to the target function _version_0_remove_liquidity_one_coin( address _curvePool, uint256 _amount, int128 _index ) internal { ICurveRegistryCache registry_ = controller.curveRegistryCache(); uint256 coins = registry_.nCoins(_curvePool); if (coins == 2) { uint256[2] memory min_amounts; ICurvePoolV0(_curvePool).remove_liquidity(_amount, min_amounts); } else if (coins == 3) { uint256[3] memory min_amounts; ICurvePoolV0(_curvePool).remove_liquidity(_amount, min_amounts); } else if (coins == 4) { uint256[4] memory min_amounts; ICurvePoolV0(_curvePool).remove_liquidity(_amount, min_amounts); } else if (coins == 5) { uint256[5] memory min_amounts; ICurvePoolV0(_curvePool).remove_liquidity(_amount, min_amounts); } else if (coins == 6) { uint256[6] memory min_amounts; ICurvePoolV0(_curvePool).remove_liquidity(_amount, min_amounts); } else if (coins == 7) { uint256[7] memory min_amounts; ICurvePoolV0(_curvePool).remove_liquidity(_amount, min_amounts); } else if (coins == 8) { uint256[8] memory min_amounts; ICurvePoolV0(_curvePool).remove_liquidity(_amount, min_amounts); } else { revert("CurveHandler: unsupported coins"); } for (uint256 i = 0; i < coins; i++) { if (i == uint256(int256(_index))) continue; address[] memory coins_ = registry_.coins(_curvePool); address coin_ = coins_[i]; uint256 balance_ = IERC20(coin_).balanceOf(address(this)); if (balance_ == 0) continue; IERC20(coin_).forceApprove(_curvePool, balance_); ICurvePoolV0(_curvePool).exchange(int128(int256(i)), _index, balance_, 0); } } function _wrapWETH(uint256 amount) internal { _WETH.deposit{value: amount}(); } function _unwrapWETH(uint256 amount) internal { _WETH.withdraw(amount); } function _addLiquidity( address _curvePool, uint256 _amount, // amount of asset to deposit address _token // asset to deposit ) internal { bool isETH = _isETH(_curvePool, _token); if (!isETH) { IERC20(_token).forceApprove(_curvePool, _amount); } ICurveRegistryCache registry_ = controller.curveRegistryCache(); uint256 index = uint128(registry_.coinIndex(_curvePool, isETH ? _ETH_ADDRESS : _token)); uint256 coins = registry_.nCoins(_curvePool); if (coins == 2) { uint256[2] memory amounts; amounts[index] = _amount; if (isETH) { _unwrapWETH(_amount); ICurvePoolV1Eth(_curvePool).add_liquidity{value: _amount}(amounts, 0); } else { ICurvePoolV1(_curvePool).add_liquidity(amounts, 0); } } else if (coins == 3) { uint256[3] memory amounts; amounts[index] = _amount; if (isETH) { _unwrapWETH(_amount); ICurvePoolV1Eth(_curvePool).add_liquidity{value: _amount}(amounts, 0); } else { ICurvePoolV1(_curvePool).add_liquidity(amounts, 0); } } else if (coins == 4) { uint256[4] memory amounts; amounts[index] = _amount; if (isETH) { _unwrapWETH(_amount); ICurvePoolV1Eth(_curvePool).add_liquidity{value: _amount}(amounts, 0); } else { ICurvePoolV1(_curvePool).add_liquidity(amounts, 0); } } else if (coins == 5) { uint256[5] memory amounts; amounts[index] = _amount; if (isETH) { _unwrapWETH(_amount); ICurvePoolV1Eth(_curvePool).add_liquidity{value: _amount}(amounts, 0); } else { ICurvePoolV1(_curvePool).add_liquidity(amounts, 0); } } else if (coins == 6) { uint256[6] memory amounts; amounts[index] = _amount; if (isETH) { _unwrapWETH(_amount); ICurvePoolV1Eth(_curvePool).add_liquidity{value: _amount}(amounts, 0); } else { ICurvePoolV1(_curvePool).add_liquidity(amounts, 0); } } else if (coins == 7) { uint256[7] memory amounts; amounts[index] = _amount; if (isETH) { _unwrapWETH(_amount); ICurvePoolV1Eth(_curvePool).add_liquidity{value: _amount}(amounts, 0); } else { ICurvePoolV1(_curvePool).add_liquidity(amounts, 0); } } else if (coins == 8) { uint256[8] memory amounts; amounts[index] = _amount; if (isETH) { _unwrapWETH(_amount); ICurvePoolV1Eth(_curvePool).add_liquidity{value: _amount}(amounts, 0); } else { ICurvePoolV1(_curvePool).add_liquidity(amounts, 0); } } else { revert("invalid number of coins for curve pool"); } } function _isETH(address pool, address token) internal view returns (bool) { return token == address(_WETH) && controller.curveRegistryCache().hasCoinDirectly(pool, _ETH_ADDRESS); } function _isETH(address pool) internal view returns (bool) { return controller.curveRegistryCache().hasCoinDirectly(pool, _ETH_ADDRESS); } function _isEthIndexFirst(address pool) internal view returns (bool) { return controller.curveRegistryCache().coinIndex(pool, address(_WETH)) == int128(0); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "IERC20.sol"; import "IERC20Permit.sol"; import "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; /** * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } /** * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful. */ 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)); } /** * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 oldAllowance = token.allowance(address(this), spender); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value)); } /** * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ 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"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value)); } } /** * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval * to be set to zero before setting it to a non-zero value, such as USDT. */ function forceApprove(IERC20 token, address spender, uint256 value) internal { bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value); if (!_callOptionalReturnBool(token, approvalCall)) { _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0)); _callOptionalReturn(token, approvalCall); } } /** * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`. * Revert on invalid signature. */ function safePermit( IERC20Permit token, address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) internal { uint256 nonceBefore = token.nonces(owner); token.permit(owner, spender, value, deadline, v, r, s); uint256 nonceAfter = token.nonces(owner); require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed"); } /** * @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"); require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } /** * @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). * * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead. */ function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) { // 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 cannot use {Address-functionCall} here since this should return false // and not revert is the subcall reverts. (bool success, bytes memory returndata) = address(token).call(data); return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @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); /** * @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 `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, 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 `from` to `to` 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 from, address to, uint256 amount) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol) 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 // OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @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 * * Furthermore, `isContract` will also return true if the target contract within * the same transaction is already scheduled for destruction by `SELFDESTRUCT`, * which only has an effect at the end of a transaction. * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 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://consensys.net/diligence/blog/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/v0.8.0/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 functionCallWithValue(target, data, 0, "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"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, 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) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, 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) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or 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 { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // 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 /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.17; import "IERC20Metadata.sol"; interface ILpToken is IERC20Metadata { function minter() external view returns (address); function mint(address account, uint256 amount, address ubo) external returns (uint256); function burn(address _owner, uint256 _amount, address ubo) external returns (uint256); function taint(address from, address to, uint256 amount) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) 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: GPL-3.0-or-later pragma solidity 0.8.17; interface ICurveHandler { function deposit(address _curvePool, address _token, uint256 _amount) external; function withdraw(address _curvePool, address _token, uint256 _amount) external; function reentrancyCheck(address _curvePool) external; function isReentrantCall(address _curvePool) external returns (bool); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.17; import "IBooster.sol"; import "CurvePoolUtils.sol"; interface ICurveRegistryCache { event PoolInitialized(address indexed pool, uint256 indexed pid); function BOOSTER() external view returns (IBooster); function initPool(address pool_) external; function initPool(address pool_, uint256 pid_) external; function lpToken(address pool_) external view returns (address); function assetType(address pool_) external view returns (CurvePoolUtils.AssetType); function isRegistered(address pool_) external view returns (bool); function hasCoinDirectly(address pool_, address coin_) external view returns (bool); function hasCoinAnywhere(address pool_, address coin_) external view returns (bool); function basePool(address pool_) external view returns (address); function coinIndex(address pool_, address coin_) external view returns (int128); function nCoins(address pool_) external view returns (uint256); function coinIndices( address pool_, address from_, address to_ ) external view returns (int128, int128, bool); function decimals(address pool_) external view returns (uint256[] memory); function interfaceVersion(address pool_) external view returns (uint256); function poolFromLpToken(address lpToken_) external view returns (address); function coins(address pool_) external view returns (address[] memory); function getPid(address _pool) external view returns (uint256); function getRewardPool(address _pool) external view returns (address); function isShutdownPid(uint256 pid_) external view returns (bool); /// @notice this returns the underlying coins of a pool, including the underlying of the base pool /// if the given pool is a meta pool /// This does not return the LP token of the base pool as an underlying /// e.g. if the pool is 3CrvFrax, this will return FRAX, DAI, USDC, USDT function getAllUnderlyingCoins(address pool) external view returns (address[] memory); }
// SPDX-License-Identifier: UNLICENSED pragma solidity 0.8.17; interface IBooster { function poolInfo( uint256 pid ) external view returns ( address lpToken, address token, address gauge, address crvRewards, address stash, bool shutdown ); function poolLength() external view returns (uint256); function deposit(uint256 _pid, uint256 _amount, bool _stake) external returns (bool); function withdraw(uint256 _pid, uint256 _amount) external returns (bool); function withdrawAll(uint256 _pid) external returns (bool); function depositAll(uint256 _pid, bool _stake) external returns (bool); function earmarkRewards(uint256 _pid) external returns (bool); function isShutdown() external view returns (bool); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.17; import "ICurvePoolV2.sol"; import "ICurvePoolV1.sol"; import "ScaledMath.sol"; library CurvePoolUtils { using ScaledMath for uint256; error NotWithinThreshold(address pool, uint256 assetA, uint256 assetB); /// @dev by default, allow for 30 bps deviation regardless of pool fees uint256 internal constant _DEFAULT_IMBALANCE_BUFFER = 30e14; /// @dev Curve scales the `fee` by 1e10 uint8 internal constant _CURVE_POOL_FEE_DECIMALS = 10; /// @dev allow imbalance to be buffer + 3x the fee, e.g. if fee is 3.6 bps and buffer is 30 bps, allow 40.8 bps uint256 internal constant _FEE_IMBALANCE_MULTIPLIER = 3; enum AssetType { USD, ETH, BTC, OTHER, CRYPTO } struct PoolMeta { address pool; uint256 numberOfCoins; AssetType assetType; uint256[] decimals; uint256[] prices; uint256[] imbalanceBuffers; } function ensurePoolBalanced(PoolMeta memory poolMeta) internal view { uint256 poolFee = ICurvePoolV1(poolMeta.pool).fee().convertScale( _CURVE_POOL_FEE_DECIMALS, 18 ); for (uint256 i = 0; i < poolMeta.numberOfCoins - 1; i++) { uint256 fromDecimals = poolMeta.decimals[i]; uint256 fromBalance = 10 ** fromDecimals; uint256 fromPrice = poolMeta.prices[i]; for (uint256 j = i + 1; j < poolMeta.numberOfCoins; j++) { uint256 toDecimals = poolMeta.decimals[j]; uint256 toPrice = poolMeta.prices[j]; uint256 toExpectedUnscaled = (fromBalance * fromPrice) / toPrice; uint256 toExpected = toExpectedUnscaled.convertScale( uint8(fromDecimals), uint8(toDecimals) ); uint256 toActual; if (poolMeta.assetType == AssetType.CRYPTO) { // Handling crypto pools toActual = ICurvePoolV2(poolMeta.pool).get_dy(i, j, fromBalance); } else { // Handling other pools toActual = ICurvePoolV1(poolMeta.pool).get_dy( int128(uint128(i)), int128(uint128(j)), fromBalance ); } uint256 _maxImbalanceBuffer = poolMeta.imbalanceBuffers[i].max( poolMeta.imbalanceBuffers[j] ); if (!_isWithinThreshold(toExpected, toActual, poolFee, _maxImbalanceBuffer)) revert NotWithinThreshold(poolMeta.pool, i, j); } } } function _isWithinThreshold( uint256 a, uint256 b, uint256 poolFee, uint256 imbalanceBuffer ) internal pure returns (bool) { if (imbalanceBuffer == 0) imbalanceBuffer = _DEFAULT_IMBALANCE_BUFFER; uint256 imbalanceTreshold = imbalanceBuffer + poolFee * _FEE_IMBALANCE_MULTIPLIER; if (a > b) return (a - b).divDown(a) <= imbalanceTreshold; return (b - a).divDown(b) <= imbalanceTreshold; } }
// SPDX-License-Identifier: UNLICENSED pragma solidity 0.8.17; interface ICurvePoolV2 { function token() external view returns (address); function coins(uint256 i) external view returns (address); function factory() external view returns (address); function exchange( uint256 i, uint256 j, uint256 dx, uint256 min_dy, bool use_eth, address receiver ) external returns (uint256); function exchange_underlying( uint256 i, uint256 j, uint256 dx, uint256 min_dy, address receiver ) external returns (uint256); function add_liquidity( uint256[2] memory amounts, uint256 min_mint_amount, bool use_eth, address receiver ) external returns (uint256); function add_liquidity( uint256[2] memory amounts, uint256 min_mint_amount ) external returns (uint256); function add_liquidity( uint256[3] memory amounts, uint256 min_mint_amount, bool use_eth, address receiver ) external returns (uint256); function add_liquidity( uint256[3] memory amounts, uint256 min_mint_amount ) external returns (uint256); function remove_liquidity( uint256 _amount, uint256[2] memory min_amounts, bool use_eth, address receiver ) external; function remove_liquidity(uint256 _amount, uint256[2] memory min_amounts) external; function remove_liquidity( uint256 _amount, uint256[3] memory min_amounts, bool use_eth, address receiver ) external; function remove_liquidity(uint256 _amount, uint256[3] memory min_amounts) external; function remove_liquidity_one_coin( uint256 token_amount, uint256 i, uint256 min_amount, bool use_eth, address receiver ) external returns (uint256); function get_dy(uint256 i, uint256 j, uint256 dx) external view returns (uint256); function calc_token_amount(uint256[] memory amounts) external view returns (uint256); function calc_withdraw_one_coin( uint256 token_amount, uint256 i ) external view returns (uint256); function get_virtual_price() external view returns (uint256); }
// SPDX-License-Identifier: UNLICENSED pragma solidity 0.8.17; interface ICurvePoolV1 { function get_virtual_price() external view returns (uint256); function add_liquidity(uint256[8] calldata amounts, uint256 min_mint_amount) external; function add_liquidity(uint256[7] calldata amounts, uint256 min_mint_amount) external; function add_liquidity(uint256[6] calldata amounts, uint256 min_mint_amount) external; function add_liquidity(uint256[5] calldata amounts, uint256 min_mint_amount) external; function add_liquidity(uint256[4] calldata amounts, uint256 min_mint_amount) external; function add_liquidity(uint256[3] calldata amounts, uint256 min_mint_amount) external; function add_liquidity(uint256[2] calldata amounts, uint256 min_mint_amount) external; function remove_liquidity_imbalance( uint256[4] calldata amounts, uint256 max_burn_amount ) external; function remove_liquidity_imbalance( uint256[3] calldata amounts, uint256 max_burn_amount ) external; function remove_liquidity_imbalance( uint256[2] calldata amounts, uint256 max_burn_amount ) external; function lp_token() external view returns (address); function A_PRECISION() external view returns (uint256); function A_precise() external view returns (uint256); function remove_liquidity(uint256 _amount, uint256[3] calldata min_amounts) external; function exchange( int128 from, int128 to, uint256 _from_amount, uint256 _min_to_amount ) external; function coins(uint256 i) external view returns (address); function balances(uint256 i) external view returns (uint256); function get_dy(int128 i, int128 j, uint256 _dx) external view returns (uint256); function calc_token_amount( uint256[4] calldata amounts, bool deposit ) external view returns (uint256); function calc_token_amount( uint256[3] calldata amounts, bool deposit ) external view returns (uint256); function calc_token_amount( uint256[2] calldata amounts, bool deposit ) external view returns (uint256); function calc_withdraw_one_coin( uint256 _token_amount, int128 i ) external view returns (uint256); function remove_liquidity_one_coin( uint256 _token_amount, int128 i, uint256 min_amount ) external; function fee() external view returns (uint256); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.17; library ScaledMath { uint256 internal constant DECIMALS = 18; uint256 internal constant ONE = 10 ** DECIMALS; function mulDown(uint256 a, uint256 b) internal pure returns (uint256) { return (a * b) / ONE; } function mulDown(uint256 a, uint256 b, uint256 decimals) internal pure returns (uint256) { return (a * b) / (10 ** decimals); } function divDown(uint256 a, uint256 b) internal pure returns (uint256) { return (a * ONE) / b; } function divDown(uint256 a, uint256 b, uint256 decimals) internal pure returns (uint256) { return (a * 10 ** decimals) / b; } function divUp(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } return ((a * ONE) - 1) / b + 1; } function mulDown(int256 a, int256 b) internal pure returns (int256) { return (a * b) / int256(ONE); } function mulDownUint128(uint128 a, uint128 b) internal pure returns (uint128) { return (a * b) / uint128(ONE); } function mulDown(int256 a, int256 b, uint256 decimals) internal pure returns (int256) { return (a * b) / int256(10 ** decimals); } function divDown(int256 a, int256 b) internal pure returns (int256) { return (a * int256(ONE)) / b; } function divDownUint128(uint128 a, uint128 b) internal pure returns (uint128) { return (a * uint128(ONE)) / b; } function divDown(int256 a, int256 b, uint256 decimals) internal pure returns (int256) { return (a * int256(10 ** decimals)) / b; } function convertScale( uint256 a, uint8 fromDecimals, uint8 toDecimals ) internal pure returns (uint256) { if (fromDecimals == toDecimals) return a; if (fromDecimals > toDecimals) return downscale(a, fromDecimals, toDecimals); return upscale(a, fromDecimals, toDecimals); } function convertScale( int256 a, uint8 fromDecimals, uint8 toDecimals ) internal pure returns (int256) { if (fromDecimals == toDecimals) return a; if (fromDecimals > toDecimals) return downscale(a, fromDecimals, toDecimals); return upscale(a, fromDecimals, toDecimals); } function upscale( uint256 a, uint8 fromDecimals, uint8 toDecimals ) internal pure returns (uint256) { return a * (10 ** (toDecimals - fromDecimals)); } function downscale( uint256 a, uint8 fromDecimals, uint8 toDecimals ) internal pure returns (uint256) { return a / (10 ** (fromDecimals - toDecimals)); } function upscale( int256 a, uint8 fromDecimals, uint8 toDecimals ) internal pure returns (int256) { return a * int256(10 ** (toDecimals - fromDecimals)); } function downscale( int256 a, uint8 fromDecimals, uint8 toDecimals ) internal pure returns (int256) { return a / int256(10 ** (fromDecimals - toDecimals)); } function intPow(uint256 a, uint256 n) internal pure returns (uint256) { uint256 result = ONE; for (uint256 i; i < n; ) { result = mulDown(result, a); unchecked { ++i; } } return result; } function absSub(uint256 a, uint256 b) internal pure returns (uint256) { unchecked { return a >= b ? a - b : b - a; } } function max(uint256 a, uint256 b) internal pure returns (uint256) { return a >= b ? a : b; } function min(uint256 a, uint256 b) internal pure returns (uint256) { return a <= b ? a : b; } }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.17; import "IERC20.sol"; interface IWETH is IERC20 { function deposit() external payable; function withdraw(uint256 wad) external; }
// SPDX-License-Identifier: UNLICENSED pragma solidity 0.8.17; interface ICurvePoolV0 { function get_virtual_price() external view returns (uint256); function add_liquidity(uint256[8] calldata amounts, uint256 min_mint_amount) external; function add_liquidity(uint256[7] calldata amounts, uint256 min_mint_amount) external; function add_liquidity(uint256[6] calldata amounts, uint256 min_mint_amount) external; function add_liquidity(uint256[5] calldata amounts, uint256 min_mint_amount) external; function add_liquidity(uint256[4] calldata amounts, uint256 min_mint_amount) external; function add_liquidity(uint256[3] calldata amounts, uint256 min_mint_amount) external; function add_liquidity(uint256[2] calldata amounts, uint256 min_mint_amount) external; function remove_liquidity_imbalance( uint256[4] calldata amounts, uint256 max_burn_amount ) external; function remove_liquidity_imbalance( uint256[3] calldata amounts, uint256 max_burn_amount ) external; function remove_liquidity_imbalance( uint256[2] calldata amounts, uint256 max_burn_amount ) external; function lp_token() external view returns (address); function A_PRECISION() external view returns (uint256); function A_precise() external view returns (uint256); function remove_liquidity(uint256 _amount, uint256[2] calldata min_amounts) external; function remove_liquidity(uint256 _amount, uint256[3] calldata min_amounts) external; function remove_liquidity(uint256 _amount, uint256[4] calldata min_amounts) external; function remove_liquidity(uint256 _amount, uint256[5] calldata min_amounts) external; function remove_liquidity(uint256 _amount, uint256[6] calldata min_amounts) external; function remove_liquidity(uint256 _amount, uint256[7] calldata min_amounts) external; function remove_liquidity(uint256 _amount, uint256[8] calldata min_amounts) external; function exchange( int128 from, int128 to, uint256 _from_amount, uint256 _min_to_amount ) external; function coins(int128 i) external view returns (address); function balances(int128 i) external view returns (uint256); function get_dy(int128 i, int128 j, uint256 _dx) external view returns (uint256); function calc_token_amount( uint256[4] calldata amounts, bool deposit ) external view returns (uint256); function calc_token_amount( uint256[3] calldata amounts, bool deposit ) external view returns (uint256); function calc_token_amount( uint256[2] calldata amounts, bool deposit ) external view returns (uint256); function calc_withdraw_one_coin( uint256 _token_amount, int128 i ) external view returns (uint256); }
// SPDX-License-Identifier: UNLICENSED pragma solidity 0.8.17; interface ICurvePoolV1Eth { function add_liquidity(uint256[2] calldata amounts, uint256 min_mint_amount) external payable; function add_liquidity(uint256[3] calldata amounts, uint256 min_mint_amount) external payable; function add_liquidity(uint256[4] calldata amounts, uint256 min_mint_amount) external payable; function add_liquidity(uint256[5] calldata amounts, uint256 min_mint_amount) external payable; function add_liquidity(uint256[6] calldata amounts, uint256 min_mint_amount) external payable; function add_liquidity(uint256[7] calldata amounts, uint256 min_mint_amount) external payable; function add_liquidity(uint256[8] calldata amounts, uint256 min_mint_amount) external payable; function remove_liquidity_imbalance( uint256[3] calldata amounts, uint256 max_burn_amount ) external; function remove_liquidity_imbalance( uint256[2] calldata amounts, uint256 max_burn_amount ) external; function remove_liquidity_one_coin( uint256 _token_amount, int128 i, uint256 min_amount ) external; function remove_liquidity(uint256 _amount, uint256[2] calldata min_amounts) external; function remove_liquidity(uint256 _amount, uint256[3] calldata min_amounts) external; function get_virtual_price() external view returns (uint256); function coins(uint256 i) external view returns (address); function get_dy(uint256 i, uint256 j, uint256 dx) external view returns (uint256); function calc_token_amount( uint256[3] calldata amounts, bool deposit ) external view returns (uint256); function calc_token_amount( uint256[2] calldata amounts, bool deposit ) external view returns (uint256); function calc_withdraw_one_coin( uint256 _token_amount, int128 i ) external view returns (uint256); function exchange( int128 from, int128 to, uint256 _from_amount, uint256 _min_to_amount ) external payable; }
// SPDX-License-Identifier: UNLICENSED pragma solidity 0.8.17; interface ICurvePoolV2Eth { function token() external view returns (address); function coins(uint256 i) external view returns (address); function factory() external view returns (address); function exchange( uint256 i, uint256 j, uint256 dx, uint256 min_dy ) external payable returns (uint256); function exchange( uint256 i, uint256 j, uint256 dx, uint256 min_dy, bool use_eth, address receiver ) external returns (uint256); function exchange_underlying( uint256 i, uint256 j, uint256 dx, uint256 min_dy, address receiver ) external returns (uint256); function add_liquidity( uint256[2] memory amounts, uint256 min_mint_amount, bool use_eth, address receiver ) external payable returns (uint256); function add_liquidity( uint256[2] memory amounts, uint256 min_mint_amount ) external returns (uint256); function add_liquidity( uint256[3] memory amounts, uint256 min_mint_amount, bool use_eth, address receiver ) external payable returns (uint256); function add_liquidity( uint256[3] memory amounts, uint256 min_mint_amount ) external returns (uint256); function remove_liquidity( uint256 _amount, uint256[2] memory min_amounts, bool use_eth, address receiver ) external; function remove_liquidity(uint256 _amount, uint256[2] memory min_amounts) external; function remove_liquidity( uint256 _amount, uint256[3] memory min_amounts, bool use_eth, address receiver ) external; function remove_liquidity(uint256 _amount, uint256[3] memory min_amounts) external; function remove_liquidity_one_coin( uint256 token_amount, uint256 i, uint256 min_amount, bool use_eth, address receiver ) external returns (uint256); function get_dy(uint256 i, uint256 j, uint256 dx) external view returns (uint256); function calc_token_amount(uint256[] memory amounts) external view returns (uint256); function calc_withdraw_one_coin( uint256 token_amount, uint256 i ) external view returns (uint256); function get_virtual_price() external view returns (uint256); function price_oracle() external view returns (uint256); function apply_new_parameters() external; }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.17; import "IConicPoolWeightManagement.sol"; import "IConicPool.sol"; import "IGenericOracle.sol"; import "IInflationManager.sol"; import "ILpTokenStaker.sol"; import "IBonding.sol"; import "IPoolAdapter.sol"; import "IFeeRecipient.sol"; import "ICurveRegistryCache.sol"; interface IController { event PoolAdded(address indexed pool); event PoolRemoved(address indexed pool); event PoolShutdown(address indexed pool); event ConvexBoosterSet(address convexBooster); event CurveHandlerSet(address curveHandler); event ConvexHandlerSet(address convexHandler); event CurveRegistryCacheSet(address curveRegistryCache); event InflationManagerSet(address inflationManager); event BondingSet(address bonding); event FeeRecipientSet(address feeRecipient); event PriceOracleSet(address priceOracle); event WeightUpdateMinDelaySet(uint256 weightUpdateMinDelay); event PauseManagerSet(address indexed manager, bool isManager); event MultiDepositsWithdrawsWhitelistSet(address pool, bool allowed); event MinimumTaintedTransferAmountSet(address indexed token, uint256 amount); event DefaultPoolAdapterSet(address poolAdapter); event CustomPoolAdapterSet(address indexed pool, address poolAdapter); struct WeightUpdate { address conicPoolAddress; IConicPoolWeightManagement.PoolWeight[] weights; } function initialize(address _lpTokenStaker) external; // inflation manager function inflationManager() external view returns (IInflationManager); function setInflationManager(address manager) external; // views function curveRegistryCache() external view returns (ICurveRegistryCache); // pool adapter function poolAdapterFor(address pool) external view returns (IPoolAdapter); function defaultPoolAdapter() external view returns (IPoolAdapter); function setDefaultPoolAdapter(address poolAdapter) external; function setCustomPoolAdapter(address pool, address poolAdapter) external; /// lp token staker function switchLpTokenStaker(address _lpTokenStaker) external; function lpTokenStaker() external view returns (ILpTokenStaker); // bonding function bonding() external view returns (IBonding); function setBonding(address _bonding) external; // fees function feeRecipient() external view returns (IFeeRecipient); function setFeeRecipient(address _feeRecipient) external; // oracle function priceOracle() external view returns (IGenericOracle); function setPriceOracle(address oracle) external; // pool functions function listPools() external view returns (address[] memory); function listActivePools() external view returns (address[] memory); function isPool(address poolAddress) external view returns (bool); function isActivePool(address poolAddress) external view returns (bool); function addPool(address poolAddress) external; function shutdownPool(address poolAddress) external; function removePool(address poolAddress) external; function cncToken() external view returns (address); function lastWeightUpdate(address poolAddress) external view returns (uint256); function updateWeights(WeightUpdate memory update) external; function updateAllWeights(WeightUpdate[] memory weights) external; // handler functions function convexBooster() external view returns (address); function curveHandler() external view returns (address); function convexHandler() external view returns (address); function setConvexBooster(address _convexBooster) external; function setCurveHandler(address _curveHandler) external; function setConvexHandler(address _convexHandler) external; function setCurveRegistryCache(address curveRegistryCache_) external; function setWeightUpdateMinDelay(uint256 delay) external; function isPauseManager(address account) external view returns (bool); function listPauseManagers() external view returns (address[] memory); function setPauseManager(address account, bool isManager) external; // deposit/withdrawal whitelist function isAllowedMultipleDepositsWithdraws(address poolAddress) external view returns (bool); function setAllowedMultipleDepositsWithdraws(address account, bool allowed) external; function getMultipleDepositsWithdrawsWhitelist() external view returns (address[] memory); // tainted transfer amount function setMinimumTaintedTransferAmount(address token, uint256 amount) external; function getMinimumTaintedTransferAmount(address token) external view returns (uint256); // constants function MAX_WEIGHT_UPDATE_MIN_DELAY() external view returns (uint256); function MIN_WEIGHT_UPDATE_MIN_DELAY() external view returns (uint256); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.17; interface IConicPoolWeightManagement { struct PoolWeight { address poolAddress; uint256 weight; } function addPool(address pool) external; function removePool(address pool) external; function updateWeights(PoolWeight[] memory poolWeights) external; function handleDepeggedCurvePool(address curvePool_) external; function handleInvalidConvexPid(address pool) external returns (uint256); function allPools() external view returns (address[] memory); function poolsCount() external view returns (uint256); function getPoolAtIndex(uint256 _index) external view returns (address); function getWeight(address curvePool) external view returns (uint256); function getWeights() external view returns (PoolWeight[] memory); function isRegisteredPool(address _pool) external view returns (bool); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.17; import "ILpToken.sol"; import "IRewardManager.sol"; import "IOracle.sol"; import "IController.sol"; import "IPausable.sol"; import "IConicPoolWeightManagement.sol"; interface IConicPool is IConicPoolWeightManagement, IPausable { event Deposit( address indexed sender, address indexed receiver, uint256 depositedAmount, uint256 lpReceived ); event Withdraw(address indexed account, uint256 amount); event NewWeight(address indexed curvePool, uint256 newWeight); event NewMaxIdleCurveLpRatio(uint256 newRatio); event ClaimedRewards(uint256 claimedCrv, uint256 claimedCvx); event HandledDepeggedCurvePool(address curvePool_); event HandledInvalidConvexPid(address curvePool_, uint256 pid_); event CurvePoolAdded(address curvePool_); event CurvePoolRemoved(address curvePool_); event Shutdown(); event DepegThresholdUpdated(uint256 newThreshold); event MaxDeviationUpdated(uint256 newMaxDeviation); event RebalancingRewardsEnabledSet(bool enabled); event EmergencyRebalancingRewardFactorUpdated(uint256 factor); struct PoolWithAmount { address poolAddress; uint256 amount; } function underlying() external view returns (IERC20Metadata); function lpToken() external view returns (ILpToken); function rewardManager() external view returns (IRewardManager); function depegThreshold() external view returns (uint256); function maxIdleCurveLpRatio() external view returns (uint256); function setMaxIdleCurveLpRatio(uint256 value) external; function setMaxDeviation(uint256 maxDeviation_) external; function updateDepegThreshold(uint256 value) external; function depositFor( address _account, uint256 _amount, uint256 _minLpReceived, bool stake ) external returns (uint256); function deposit(uint256 _amount, uint256 _minLpReceived) external returns (uint256); function deposit( uint256 _amount, uint256 _minLpReceived, bool stake ) external returns (uint256); function exchangeRate() external view returns (uint256); function usdExchangeRate() external view returns (uint256); function unstakeAndWithdraw(uint256 _amount, uint256 _minAmount) external returns (uint256); function unstakeAndWithdraw( uint256 _amount, uint256 _minAmount, address _to ) external returns (uint256); function withdraw(uint256 _amount, uint256 _minAmount) external returns (uint256); function withdraw(uint256 _amount, uint256 _minAmount, address _to) external returns (uint256); function getAllocatedUnderlying() external view returns (PoolWithAmount[] memory); function rebalancingRewardActive() external view returns (bool); function totalDeviationAfterWeightUpdate() external view returns (uint256); function computeTotalDeviation() external view returns (uint256); /// @notice returns the total amount of funds held by this pool in terms of underlying function totalUnderlying() external view returns (uint256); function getTotalAndPerPoolUnderlying() external view returns ( uint256 totalUnderlying_, uint256 totalAllocated_, uint256[] memory perPoolUnderlying_ ); /// @notice same as `totalUnderlying` but returns a cached version /// that might be slightly outdated if oracle prices have changed /// @dev this is useful in cases where we want to reduce gas usage and do /// not need a precise value function cachedTotalUnderlying() external view returns (uint256); function updateRewardSpendingApproval(address token, bool approved) external; function shutdownPool() external; function isShutdown() external view returns (bool); function isBalanced() external view returns (bool); function rebalancingRewardsEnabled() external view returns (bool); function setRebalancingRewardsEnabled(bool enabled) external; function getAllUnderlyingCoins() external view returns (address[] memory result); function rebalancingRewardsFactor() external view returns (uint256); function rebalancingRewardsActivatedAt() external view returns (uint64); function getWeights() external view returns (PoolWeight[] memory); function runSanityChecks() external; }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.17; interface IRewardManager { event ClaimedRewards(uint256 claimedCrv, uint256 claimedCvx); event SoldRewardTokens(uint256 targetTokenReceived); event ExtraRewardAdded(address reward); event ExtraRewardRemoved(address reward); event ExtraRewardsCurvePoolSet(address extraReward, address curvePool); event FeesSet(uint256 feePercentage); event FeesEnabled(uint256 feePercentage); event EarningsClaimed( address indexed claimedBy, uint256 cncEarned, uint256 crvEarned, uint256 cvxEarned ); function accountCheckpoint(address account) external; function poolCheckpoint() external returns (bool); function addExtraReward(address reward) external returns (bool); function addBatchExtraRewards(address[] memory rewards) external; function conicPool() external view returns (address); function setFeePercentage(uint256 _feePercentage) external; function claimableRewards( address account ) external view returns (uint256 cncRewards, uint256 crvRewards, uint256 cvxRewards); function claimEarnings() external returns (uint256, uint256, uint256); function claimPoolEarningsAndSellRewardTokens() external; function feePercentage() external view returns (uint256); function feesEnabled() external view returns (bool); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.17; interface IOracle { event TokenUpdated(address indexed token, address feed, uint256 maxDelay, bool isEthPrice); /// @notice returns the price in USD of symbol. function getUSDPrice(address token) external view returns (uint256); /// @notice returns if the given token is supported for pricing. function isTokenSupported(address token) external view returns (bool); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.17; import "Ownable.sol"; import "IController.sol"; interface IPausable { event Paused(uint256 pausedUntil); event PauseDurationSet(uint256 pauseDuration); function controller() external view returns (IController); function pausedUntil() external view returns (uint256); function pauseDuration() external view returns (uint256); function isPaused() external view returns (bool); function setPauseDuration(uint256 _pauseDuration) external; function pause() external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "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() { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby disabling any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(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"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) 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: GPL-3.0-or-later pragma solidity 0.8.17; import "IOracle.sol"; interface IGenericOracle is IOracle { /// @notice returns the oracle to be used to price `token` function getOracle(address token) external view returns (IOracle); /// @notice converts the price of an LP token to the given underlying function curveLpToUnderlying( address curveLpToken, address underlying, uint256 curveLpAmount ) external view returns (uint256); /// @notice same as above but avoids fetching the underlying price again function curveLpToUnderlying( address curveLpToken, address underlying, uint256 curveLpAmount, uint256 underlyingPrice ) external view returns (uint256); /// @notice converts the price an underlying asset to a given Curve LP token function underlyingToCurveLp( address underlying, address curveLpToken, uint256 underlyingAmount ) external view returns (uint256); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.17; interface IInflationManager { event TokensClaimed(address indexed pool, uint256 cncAmount); event RebalancingRewardHandlerAdded(address indexed pool, address indexed handler); event RebalancingRewardHandlerRemoved(address indexed pool, address indexed handler); event PoolWeightsUpdated(); function executeInflationRateUpdate() external; function updatePoolWeights() external; /// @notice returns the weights of the Conic pools to know how much inflation /// each of them will receive, as well as the total amount of USD value in all the pools function computePoolWeights() external view returns (address[] memory _pools, uint256[] memory poolWeights, uint256 totalUSDValue); function computePoolWeight( address pool ) external view returns (uint256 poolWeight, uint256 totalUSDValue); function currentInflationRate() external view returns (uint256); function getCurrentPoolInflationRate(address pool) external view returns (uint256); function handleRebalancingRewards( address account, uint256 deviationBefore, uint256 deviationAfter ) external; function addPoolRebalancingRewardHandler( address poolAddress, address rebalancingRewardHandler ) external; function removePoolRebalancingRewardHandler( address poolAddress, address rebalancingRewardHandler ) external; function rebalancingRewardHandlers( address poolAddress ) external view returns (address[] memory); function hasPoolRebalancingRewardHandler( address poolAddress, address handler ) external view returns (bool); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.17; interface ILpTokenStaker { event LpTokenStaked(address indexed account, uint256 amount); event LpTokenUnstaked(address indexed account, uint256 amount); event TokensClaimed(address indexed pool, uint256 cncAmount); event Shutdown(); function stake(uint256 amount, address conicPool) external; function unstake(uint256 amount, address conicPool) external; function stakeFor(uint256 amount, address conicPool, address account) external; function unstakeFor(uint256 amount, address conicPool, address account) external; function unstakeFrom(uint256 amount, address account) external; function getUserBalanceForPool( address conicPool, address account ) external view returns (uint256); function getBalanceForPool(address conicPool) external view returns (uint256); function updateBoost(address user) external; function claimCNCRewardsForPool(address pool) external; function claimableCnc(address pool) external view returns (uint256); function checkpoint(address pool) external returns (uint256); function shutdown() external; function getBoost(address user) external view returns (uint256); function isShutdown() external view returns (bool); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.17; interface IBonding { event CncStartPriceSet(uint256 startPrice); event PriceIncreaseFactorSet(uint256 factor); event MinBondingAmountSet(uint256 amount); event Bonded( address indexed account, address indexed recipient, uint256 lpTokenAmount, uint256 cncReceived, uint256 lockTime ); event DebtPoolSet(address indexed pool); event DebtPoolFeesClaimed(uint256 crvAmount, uint256 cvxAmount, uint256 cncAmount); event StreamClaimed(address indexed account, uint256 amount); event BondingStarted(uint256 amount, uint256 epochs); event RemainingCNCRecovered(uint256 amount); function startBonding() external; function setCncStartPrice(uint256 _cncStartPrice) external; function setCncPriceIncreaseFactor(uint256 _priceIncreaseFactor) external; function setMinBondingAmount(uint256 _minBondingAmount) external; function setDebtPool(address _debtPool) external; function bondCncCrvUsd( uint256 lpTokenAmount, uint256 minCncReceived, uint64 cncLockTime ) external returns (uint256); function recoverRemainingCNC() external; function claimStream() external; function claimFeesForDebtPool() external; function streamCheckpoint() external; function accountCheckpoint(address account) external; function computeCurrentCncBondPrice() external view returns (uint256); function cncAvailable() external view returns (uint256); function cncBondPrice() external view returns (uint256); function bondCncCrvUsdFor( uint256 lpTokenAmount, uint256 minCncReceived, uint64 cncLockTime, address recipient ) external returns (uint256); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.17; interface IPoolAdapter { /// @notice This is to set which LP token price the value computation should use /// `Latest` uses a freshly computed price /// `Cached` uses the price in cache /// `Minimum` uses the minimum of these two enum PriceMode { Latest, Cached, Minimum } /// @notice Deposit `underlyingAmount` of `underlying` into `pool` /// @dev This function should be written with the assumption that it will be delegate-called into function deposit(address pool, address underlying, uint256 underlyingAmount) external; /// @notice Withdraw `underlyingAmount` of `underlying` from `pool` /// @dev This function should be written with the assumption that it will be delegate-called into function withdraw(address pool, address underlying, uint256 underlyingAmount) external; /// @notice Returns the amount of of assets that `conicPool` holds in `pool`, in terms of USD function computePoolValueInUSD( address conicPool, address pool ) external view returns (uint256 usdAmount); /// @notice Updates the price caches of the given pools function updatePriceCache(address pool) external; /// @notice Returns the amount of of assets that `conicPool` holds in `pool`, in terms of USD /// using the given price mode function computePoolValueInUSD( address conicPool, address pool, PriceMode priceMode ) external view returns (uint256 usdAmount); /// @notice Returns the amount of of assets that `conicPool` holds in `pool`, in terms of underlying function computePoolValueInUnderlying( address conicPool, address pool, address underlying, uint256 underlyingPrice ) external view returns (uint256 underlyingAmount); /// @notice Returns the amount of of assets that `conicPool` holds in `pool`, in terms of underlying /// using the given price mode function computePoolValueInUnderlying( address conicPool, address pool, address underlying, uint256 underlyingPrice, PriceMode priceMode ) external view returns (uint256 underlyingAmount); /// @notice Claim earnings of `conicPool` from `pool` function claimEarnings(address conicPool, address pool) external; /// @notice Returns the LP token of a given `pool` function lpToken(address pool) external view returns (address); /// @notice Returns true if `pool` supports `asset` function supportsAsset(address pool, address asset) external view returns (bool); /// @notice Returns the amount of CRV earned by `pool` on Convex function getCRVEarnedOnConvex( address account, address curvePool ) external view returns (uint256); /// @notice Executes a sanity check, e.g. checking for reentrancy function executeSanityCheck(address pool) external; /// @notice returns all the underlying coins of the pool function getAllUnderlyingCoins(address pool) external view returns (address[] memory); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.17; interface IFeeRecipient { event FeesReceived(address indexed sender, uint256 crvAmount, uint256 cvxAmount); function receiveFees(uint256 amountCrv, uint256 amountCvx) external; }
{ "evmVersion": "london", "optimizer": { "enabled": true, "runs": 200 }, "libraries": { "CurveHandler.sol": {} }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
Contract Security Audit
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[{"inputs":[{"internalType":"address","name":"controller_","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"_curvePool","type":"address"},{"internalType":"address","name":"_token","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_curvePool","type":"address"}],"name":"isReentrantCall","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_curvePool","type":"address"}],"name":"reentrancyCheck","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_curvePool","type":"address"},{"internalType":"address","name":"_token","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000002790ec478f150a98f5d96755601a26403df57eae
-----Decoded View---------------
Arg [0] : controller_ (address): 0x2790EC478f150a98F5D96755601a26403DF57EaE
-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000002790ec478f150a98f5d96755601a26403df57eae
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.