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Latest 25 from a total of 38 transactions
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Rebalance | 16099011 | 598 days ago | IN | 0 ETH | 0.03782822 | ||||
Rebalance | 16088142 | 600 days ago | IN | 0 ETH | 0.01695813 | ||||
Rebalance | 16066668 | 603 days ago | IN | 0 ETH | 0.01250697 | ||||
Rebalance | 16045188 | 606 days ago | IN | 0 ETH | 0.01758271 | ||||
Rebalance | 16020568 | 609 days ago | IN | 0 ETH | 0.0493822 | ||||
Rebalance | 16009413 | 611 days ago | IN | 0 ETH | 0.01471842 | ||||
Harvest VSP | 16004086 | 611 days ago | IN | 0 ETH | 0.00330161 | ||||
Rebalance | 15987929 | 614 days ago | IN | 0 ETH | 0.0184998 | ||||
Rebalance | 15965377 | 617 days ago | IN | 0 ETH | 0.03815944 | ||||
Rebalance | 15952118 | 619 days ago | IN | 0 ETH | 0.01754158 | ||||
Rebalance | 15930415 | 622 days ago | IN | 0 ETH | 0.02114565 | ||||
Rebalance | 15927605 | 622 days ago | IN | 0 ETH | 0.13280657 | ||||
Rebalance | 15909164 | 625 days ago | IN | 0 ETH | 0.01593837 | ||||
Rebalance | 15887684 | 628 days ago | IN | 0 ETH | 0.01962554 | ||||
Rebalance | 15866222 | 631 days ago | IN | 0 ETH | 0.00890566 | ||||
Rebalance | 15844741 | 634 days ago | IN | 0 ETH | 0.01203835 | ||||
Rebalance | 15823282 | 637 days ago | IN | 0 ETH | 0.01291966 | ||||
Rebalance | 15802138 | 640 days ago | IN | 0 ETH | 0.01908405 | ||||
Rebalance | 15780937 | 642 days ago | IN | 0 ETH | 0.02906697 | ||||
Rebalance | 15759756 | 645 days ago | IN | 0 ETH | 0.01955718 | ||||
Harvest VSP | 15753538 | 646 days ago | IN | 0 ETH | 0.00453349 | ||||
Rebalance | 15738654 | 648 days ago | IN | 0 ETH | 0.03265964 | ||||
Rebalance | 15737384 | 649 days ago | IN | 0 ETH | 0.01174805 | ||||
Rebalance | 15715891 | 652 days ago | IN | 0 ETH | 0.03423739 | ||||
Rebalance | 15694410 | 655 days ago | IN | 0 ETH | 0.00543841 |
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Contract Name:
AaveV2VesperXy
Compiler Version
v0.8.9+commit.e5eed63a
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.8.9; import "vesper-pools/contracts/interfaces/vesper/IVesperPool.sol"; import "./AaveV2Xy.sol"; /// @title Deposit Collateral in Aave and earn interest by depositing borrowed token in a Vesper Pool. contract AaveV2VesperXy is AaveV2Xy { using SafeERC20 for IERC20; // Destination Grow Pool for borrowed Token IVesperPool public immutable vPool; // VSP token address address public immutable vsp; constructor( address _pool, address _swapper, address _rewardToken, address _receiptToken, address _borrowToken, address _vPool, address _vspAddress, string memory _name ) AaveV2Xy(_pool, _swapper, _rewardToken, _receiptToken, _borrowToken, _name) { require(_vspAddress != address(0), "invalid-vsp-address"); require(address(IVesperPool(_vPool).token()) == borrowToken, "invalid-grow-pool"); vPool = IVesperPool(_vPool); vsp = _vspAddress; } /// @notice Claim VSP and convert to collateral token function harvestVSP() external { address _poolRewards = vPool.poolRewards(); if (_poolRewards != address(0)) { IPoolRewards(_poolRewards).claimReward(address(this)); } uint256 _vspAmount = IERC20(vsp).balanceOf(address(this)); if (_vspAmount > 0) { _swapExactInput(vsp, address(collateralToken), _vspAmount); } } /// @notice After borrowing Y, deposit to Vesper Pool function _afterBorrowY(uint256 _amount) internal virtual override { vPool.deposit(_amount); } /// @notice Approve all required tokens function _approveToken(uint256 _amount) internal virtual override { super._approveToken(_amount); IERC20(borrowToken).safeApprove(address(vPool), _amount); IERC20(vsp).safeApprove(address(swapper), _amount); } /// @notice Before repaying Y, withdraw it from Vesper Pool function _beforeRepayY(uint256 _amount) internal virtual override { _withdrawFromVesperPool(_amount); } /// @notice Borrowed Y balance deposited in Vesper Pool function _getInvestedBorrowBalance() internal view virtual override returns (uint256) { return IERC20(borrowToken).balanceOf(address(this)) + ((vPool.pricePerShare() * vPool.balanceOf(address(this))) / 1e18); } /// @notice Swap excess borrow for more collateral when underlying VSP pool is making profits function _rebalanceBorrow(uint256 _excessBorrow) internal virtual override { if (_excessBorrow > 0) { _withdrawFromVesperPool(_excessBorrow); uint256 _borrowedHere = IERC20(borrowToken).balanceOf(address(this)); if (_borrowedHere > 0) { _safeSwapExactInput(borrowToken, address(collateralToken), _borrowedHere); } } } /// @notice Withdraw _shares proportional to collateral _amount from vPool function _withdrawFromVesperPool(uint256 _amount) internal { if (_amount > 0) { uint256 _pricePerShare = vPool.pricePerShare(); uint256 _shares = (_amount * 1e18) / _pricePerShare; _shares = _amount > ((_shares * _pricePerShare) / 1e18) ? _shares + 1 : _shares; vPool.withdraw(Math.min(_shares, vPool.balanceOf(address(this)))); } } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.9; interface IStrategy { function rebalance() external returns ( uint256 _profit, uint256 _loss, uint256 _payback ); function sweepERC20(address _fromToken) external; function withdraw(uint256 _amount) external; function feeCollector() external view returns (address); function isReservedToken(address _token) external view returns (bool); function keepers() external view returns (address[] memory); function migrate(address _newStrategy) external; function token() external view returns (address); function pool() external view returns (address); // solhint-disable-next-line func-name-mixedcase function VERSION() external view returns (string memory); function collateral() external view returns (address); }
// SPDX-License-Identifier: MIT pragma solidity 0.8.9; /// @title Errors library library Errors { string public constant INVALID_COLLATERAL_AMOUNT = "1"; // Collateral must be greater than 0 or > defined limit string public constant INVALID_SHARE_AMOUNT = "2"; // Share must be greater than 0 string public constant INVALID_INPUT_LENGTH = "3"; // Input array length must be greater than 0 string public constant INPUT_LENGTH_MISMATCH = "4"; // Input array length mismatch with another array length string public constant NOT_WHITELISTED_ADDRESS = "5"; // Caller is not whitelisted to withdraw without fee string public constant MULTI_TRANSFER_FAILED = "6"; // Multi transfer of tokens has failed string public constant FEE_COLLECTOR_NOT_SET = "7"; // Fee Collector is not set string public constant NOT_ALLOWED_TO_SWEEP = "8"; // Token is not allowed to sweep string public constant INSUFFICIENT_BALANCE = "9"; // Insufficient balance to performs operations to follow string public constant INPUT_ADDRESS_IS_ZERO = "10"; // Input address is zero string public constant FEE_LIMIT_REACHED = "11"; // Fee must be less than MAX_BPS string public constant ALREADY_INITIALIZED = "12"; // Data structure, contract, or logic already initialized and can not be called again string public constant ADD_IN_LIST_FAILED = "13"; // Cannot add address in address list string public constant REMOVE_FROM_LIST_FAILED = "14"; // Cannot remove address from address list string public constant STRATEGY_IS_ACTIVE = "15"; // Strategy is already active, an inactive strategy is required string public constant STRATEGY_IS_NOT_ACTIVE = "16"; // Strategy is not active, an active strategy is required string public constant INVALID_STRATEGY = "17"; // Given strategy is not a strategy of this pool string public constant DEBT_RATIO_LIMIT_REACHED = "18"; // Debt ratio limit reached. It must be less than MAX_BPS string public constant TOTAL_DEBT_IS_NOT_ZERO = "19"; // Strategy total debt must be 0 string public constant LOSS_TOO_HIGH = "20"; // Strategy reported loss must be less than current debt string public constant INVALID_MAX_BORROW_LIMIT = "21"; // Max borrow limit is beyond range. string public constant MAX_LIMIT_LESS_THAN_MIN = "22"; // Max limit should be greater than min limit. string public constant INVALID_SLIPPAGE = "23"; // Slippage should be less than MAX_BPS string public constant WRONG_RECEIPT_TOKEN = "24"; // Wrong receipt token address string public constant AAVE_FLASH_LOAN_NOT_ACTIVE = "25"; // aave flash loan is not active string public constant DYDX_FLASH_LOAN_NOT_ACTIVE = "26"; // DYDX flash loan is not active string public constant INVALID_FLASH_LOAN = "27"; // invalid-flash-loan string public constant INVALID_INITIATOR = "28"; // "invalid-initiator" string public constant INCORRECT_WITHDRAW_AMOUNT = "29"; // withdrawn amount is not correct string public constant NO_MARKET_ID_FOUND = "30"; // dydx flash loan no marketId found for token string public constant SAME_AS_PREVIOUS = "31"; // Input should not be same as previous value. string public constant INVALID_INPUT = "32"; // Generic invalid input error code }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../IERC20.sol"; import "../../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender) + value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { unchecked { uint256 oldAllowance = token.allowance(address(this), spender); require(oldAllowance >= value, "SafeERC20: decreased allowance below zero"); uint256 newAllowance = oldAllowance - value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: value }(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.delegatecall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /* * @dev 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) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a >= b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow, so we distribute return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) * and `uint256` (`UintSet`) are supported. */ library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping(bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; if (lastIndex != toDeleteIndex) { bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex } // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { return set._values[index]; } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function _values(Set storage set) private view returns (bytes32[] memory) { return set._values; } // Bytes32Set struct Bytes32Set { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _add(set._inner, value); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _remove(set._inner, value); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return _contains(set._inner, value); } /** * @dev Returns the number of values in the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return _at(set._inner, index); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(Bytes32Set storage set) internal view returns (bytes32[] memory) { return _values(set._inner); } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint160(uint256(_at(set._inner, index)))); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(AddressSet storage set) internal view returns (address[] memory) { bytes32[] memory store = _values(set._inner); address[] memory result; assembly { result := store } return result; } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(UintSet storage set) internal view returns (uint256[] memory) { bytes32[] memory store = _values(set._inner); uint256[] memory result; assembly { result := store } return result; } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.9; /** * @notice Governable interface */ interface IGovernable { function governor() external view returns (address _governor); function transferGovernorship(address _proposedGovernor) external; }
// SPDX-License-Identifier: MIT pragma solidity 0.8.9; /** * @notice Pausable interface */ interface IPausable { function paused() external view returns (bool); function stopEverything() external view returns (bool); function pause() external; function unpause() external; function shutdown() external; function open() external; }
// SPDX-License-Identifier: MIT pragma solidity 0.8.9; interface IPoolRewards { /// Emitted after reward added event RewardAdded(address indexed rewardToken, uint256 reward, uint256 rewardDuration); /// Emitted whenever any user claim rewards event RewardPaid(address indexed user, address indexed rewardToken, uint256 reward); /// Emitted after adding new rewards token into rewardTokens array event RewardTokenAdded(address indexed rewardToken, address[] existingRewardTokens); function claimReward(address) external; function notifyRewardAmount( address _rewardToken, uint256 _rewardAmount, uint256 _rewardDuration ) external; function notifyRewardAmount( address[] memory _rewardTokens, uint256[] memory _rewardAmounts, uint256[] memory _rewardDurations ) external; function updateReward(address) external; function claimable(address _account) external view returns (address[] memory _rewardTokens, uint256[] memory _claimableAmounts); function lastTimeRewardApplicable(address _rewardToken) external view returns (uint256); function rewardForDuration() external view returns (address[] memory _rewardTokens, uint256[] memory _rewardForDuration); function rewardPerToken() external view returns (address[] memory _rewardTokens, uint256[] memory _rewardPerTokenRate); }
// SPDX-License-Identifier: MIT pragma solidity 0.8.9; import "../../dependencies/openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol"; import "./IGovernable.sol"; import "./IPausable.sol"; interface IVesperPool is IGovernable, IPausable, IERC20Metadata { function calculateUniversalFee(uint256 _profit) external view returns (uint256 _fee); function deposit(uint256 _share) external; function multiTransfer(address[] memory _recipients, uint256[] memory _amounts) external returns (bool); function excessDebt(address _strategy) external view returns (uint256); function poolAccountant() external view returns (address); function poolRewards() external view returns (address); function reportEarning( uint256 _profit, uint256 _loss, uint256 _payback ) external; function reportLoss(uint256 _loss) external; function sweepERC20(address _fromToken) external; function withdraw(uint256 _amount) external; function keepers() external view returns (address[] memory); function isKeeper(address _address) external view returns (bool); function maintainers() external view returns (address[] memory); function isMaintainer(address _address) external view returns (bool); function pricePerShare() external view returns (uint256); function strategy(address _strategy) external view returns ( bool _active, uint256 _interestFee, // Obsolete uint256 _debtRate, // Obsolete uint256 _lastRebalance, uint256 _totalDebt, uint256 _totalLoss, uint256 _totalProfit, uint256 _debtRatio, uint256 _externalDepositFee ); function token() external view returns (IERC20); function tokensHere() external view returns (uint256); function totalDebtOf(address _strategy) external view returns (uint256); function totalValue() external view returns (uint256); function totalDebt() external view returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity 0.8.9; import "vesper-pools/contracts/dependencies/openzeppelin/contracts/token/ERC20/IERC20.sol"; // @dev Interface support both Aave v2 and v3 methods interface PoolAddressesProvider { function getPool() external view returns (address); // Aave v2 method. function getLendingPool() external view returns (address); function getPoolDataProvider() external view returns (address); function getAddress(bytes32 id) external view returns (address); function getPriceOracle() external view returns (address); } interface AaveOracle { function getAssetPrice(address _asset) external view returns (uint256); } interface AToken is IERC20 { /** * @dev Returns the address of the incentives controller contract **/ function getIncentivesController() external view returns (address); function mint( address user, uint256 amount, uint256 index ) external returns (bool); function burn( address user, address receiverOfUnderlying, uint256 amount, uint256 index ) external; //solhint-disable func-name-mixedcase function UNDERLYING_ASSET_ADDRESS() external view returns (address); } interface AaveIncentivesController { function getRewardsBalance(address[] calldata assets, address user) external view returns (uint256); function claimRewards( address[] calldata assets, uint256 amount, address to ) external returns (uint256); function claimAllRewards(address[] calldata assets, address to) external returns (address[] memory rewardsList, uint256[] memory claimedAmounts); function getRewardsList() external view returns (address[] memory); } interface AaveLendingPool { function deposit( address asset, uint256 amount, address onBehalfOf, uint16 referralCode ) external; function supply( address asset, uint256 amount, address onBehalfOf, uint16 referralCode ) external; function withdraw( address asset, uint256 amount, address to ) external returns (uint256); function flashLoan( address receiverAddress, address[] calldata assets, uint256[] calldata amounts, uint256[] calldata interestRateModes, address onBehalfOf, bytes calldata params, uint16 referralCode ) external; function borrow( address asset, uint256 amount, uint256 interestRateMode, uint16 referralCode, address onBehalfOf ) external; function repay( address asset, uint256 amount, uint256 interestRateMode, address onBehalfOf ) external; function getUserAccountData(address _user) external view returns ( uint256 totalCollateralETH, uint256 totalDebtETH, uint256 availableBorrowsETH, uint256 currentLiquidationThreshold, uint256 ltv, uint256 healthFactor ); } interface AaveProtocolDataProvider { function getReserveTokensAddresses(address asset) external view returns ( address aTokenAddress, address stableDebtTokenAddress, address variableDebtTokenAddress ); function getReserveData(address asset) external view returns ( uint256 availableLiquidity, uint256 totalStableDebt, uint256 totalVariableDebt, uint256 liquidityRate, uint256 variableBorrowRate, uint256 stableBorrowRate, uint256 averageStableBorrowRate, uint256 liquidityIndex, uint256 variableBorrowIndex, uint40 lastUpdateTimestamp ); function getReserveConfigurationData(address asset) external view returns ( uint256 decimals, uint256 ltv, uint256 liquidationThreshold, uint256 liquidationBonus, uint256 reserveFactor, bool usageAsCollateralEnabled, bool borrowingEnabled, bool stableBorrowRateEnabled, bool isActive, bool isFrozen ); } //solhint-disable func-name-mixedcase interface StakedAave is IERC20 { function claimRewards(address to, uint256 amount) external; function cooldown() external; function stake(address onBehalfOf, uint256 amount) external; function redeem(address to, uint256 amount) external; function getTotalRewardsBalance(address staker) external view returns (uint256); function stakersCooldowns(address staker) external view returns (uint256); function COOLDOWN_SECONDS() external view returns (uint256); function UNSTAKE_WINDOW() external view returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity 0.8.9; /** * @notice Routed Swapper interface * @dev This contract doesn't support native coins (e.g. ETH, AVAX, MATIC, etc) use wrapper tokens instead */ interface IRoutedSwapper { /** * @notice The list of supported DEXes * @dev This function is gas intensive */ function getAllExchanges() external view returns (address[] memory); /** * @notice Get *spot* quote * It will return the swap amount based on the current reserves of the best pair/path found (i.e. spot price). * @dev It shouldn't be used as oracle!!! */ function getAmountIn( address tokenIn_, address tokenOut_, uint256 amountOut_ ) external returns (uint256 _amountIn); /** * @notice Get *spot* quote * It will return the swap amount based on the current reserves of the best pair/path found (i.e. spot price). * @dev It shouldn't be used as oracle!!! */ function getAmountOut( address tokenIn_, address tokenOut_, uint256 amountIn_ ) external returns (uint256 _amountOut); /** * @notice Perform an exact input swap - will revert if there is no default routing */ function swapExactInput( address tokenIn_, address tokenOut_, uint256 amountIn_, uint256 amountOutMin_, address _receiver ) external returns (uint256 _amountOut); /** * @notice Perform an exact output swap - will revert if there is no default routing */ function swapExactOutput( address tokenIn_, address tokenOut_, uint256 amountOut_, uint256 amountInMax_, address receiver_ ) external returns (uint256 _amountIn); }
// SPDX-License-Identifier: MIT pragma solidity 0.8.9; import "vesper-pools/contracts/interfaces/vesper/IVesperPool.sol"; import "vesper-pools/contracts/dependencies/openzeppelin/contracts/token/ERC20/IERC20.sol"; import "vesper-pools/contracts/dependencies/openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "vesper-pools/contracts/dependencies/openzeppelin/contracts/utils/Context.sol"; import "vesper-pools/contracts/dependencies/openzeppelin/contracts/utils/structs/EnumerableSet.sol"; import "vesper-pools/contracts/dependencies/openzeppelin/contracts/utils/math/Math.sol"; import "vesper-commons/contracts/interfaces/vesper/IStrategy.sol"; import "../interfaces/swapper/IRoutedSwapper.sol"; abstract contract Strategy is IStrategy, Context { using SafeERC20 for IERC20; using EnumerableSet for EnumerableSet.AddressSet; IERC20 public immutable collateralToken; address public receiptToken; address public immutable override pool; address public override feeCollector; IRoutedSwapper public swapper; address internal constant ETH = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; uint256 internal constant MAX_UINT_VALUE = type(uint256).max; EnumerableSet.AddressSet private _keepers; event UpdatedFeeCollector(address indexed previousFeeCollector, address indexed newFeeCollector); event UpdatedSwapper(IRoutedSwapper indexed oldSwapper, IRoutedSwapper indexed newSwapper); constructor( address _pool, address _swapper, address _receiptToken ) { require(_pool != address(0), "pool-address-is-zero"); require(_swapper != address(0), "swapper-address-is-zero"); swapper = IRoutedSwapper(_swapper); pool = _pool; collateralToken = IVesperPool(_pool).token(); receiptToken = _receiptToken; require(_keepers.add(_msgSender()), "add-keeper-failed"); } modifier onlyGovernor() { require(_msgSender() == IVesperPool(pool).governor(), "caller-is-not-the-governor"); _; } modifier onlyKeeper() { require(_keepers.contains(_msgSender()), "caller-is-not-a-keeper"); _; } modifier onlyPool() { require(_msgSender() == pool, "caller-is-not-vesper-pool"); _; } /** * @notice Add given address in keepers list. * @param _keeperAddress keeper address to add. */ function addKeeper(address _keeperAddress) external onlyGovernor { require(_keepers.add(_keeperAddress), "add-keeper-failed"); } /// @dev Approve all required tokens function approveToken() external onlyKeeper { _approveToken(0); _approveToken(MAX_UINT_VALUE); } /// @notice Check whether given token is reserved or not. Reserved tokens are not allowed to sweep. function isReservedToken(address _token) public view virtual override returns (bool); /// @notice Return list of keepers function keepers() external view override returns (address[] memory) { return _keepers.values(); } /** * @notice Migrate all asset and vault ownership,if any, to new strategy * @dev _beforeMigration hook can be implemented in child strategy to do extra steps. * @param _newStrategy Address of new strategy */ function migrate(address _newStrategy) external virtual override onlyPool { require(_newStrategy != address(0), "new-strategy-address-is-zero"); require(IStrategy(_newStrategy).pool() == pool, "not-valid-new-strategy"); _beforeMigration(_newStrategy); IERC20(receiptToken).safeTransfer(_newStrategy, IERC20(receiptToken).balanceOf(address(this))); collateralToken.safeTransfer(_newStrategy, collateralToken.balanceOf(address(this))); } /** * @notice OnlyKeeper: Rebalance profit, loss and investment of this strategy. * Calculate profit, loss and payback of this strategy and realize profit/loss and * withdraw fund for payback, if any, and submit this report to pool. * @return _profit Realized profit in collateral. * @return _loss Realized loss, if any, in collateral. * @return _payback If strategy has any excess debt, we have to liquidate asset to payback excess debt. */ function rebalance() external onlyKeeper returns ( uint256 _profit, uint256 _loss, uint256 _payback ) { return _rebalance(); } /** * @notice Remove given address from keepers list. * @param _keeperAddress keeper address to remove. */ function removeKeeper(address _keeperAddress) external onlyGovernor { require(_keepers.remove(_keeperAddress), "remove-keeper-failed"); } /** * @notice sweep given token to feeCollector of strategy * @param _fromToken token address to sweep */ function sweepERC20(address _fromToken) external override onlyKeeper { require(feeCollector != address(0), "fee-collector-not-set"); require(_fromToken != address(collateralToken), "not-allowed-to-sweep-collateral"); require(!isReservedToken(_fromToken), "not-allowed-to-sweep"); if (_fromToken == ETH) { Address.sendValue(payable(feeCollector), address(this).balance); } else { uint256 _amount = IERC20(_fromToken).balanceOf(address(this)); IERC20(_fromToken).safeTransfer(feeCollector, _amount); } } /// @notice Returns address of token correspond to receipt token function token() external view override returns (address) { return receiptToken; } /// @notice Returns address of token correspond to collateral token function collateral() external view override returns (address) { return address(collateralToken); } /// @notice Returns total collateral locked in the strategy function tvl() external view virtual returns (uint256); /** * @notice Update fee collector * @param _feeCollector fee collector address */ function updateFeeCollector(address _feeCollector) external onlyGovernor { require(_feeCollector != address(0), "fee-collector-address-is-zero"); require(_feeCollector != feeCollector, "fee-collector-is-same"); emit UpdatedFeeCollector(feeCollector, _feeCollector); feeCollector = _feeCollector; } /** * @notice Update swapper * @param _swapper swapper address */ function updateSwapper(IRoutedSwapper _swapper) external onlyGovernor { require(address(_swapper) != address(0), "swapper-address-is-zero"); require(_swapper != swapper, "swapper-is-same"); emit UpdatedSwapper(swapper, _swapper); swapper = _swapper; } /** * @notice Withdraw collateral token from end protocol. * @param _amount Amount of collateral token */ function withdraw(uint256 _amount) external override onlyPool { uint256 _collateralHere = collateralToken.balanceOf(address(this)); if (_collateralHere >= _amount) { collateralToken.safeTransfer(pool, _amount); } else { _withdrawHere(_amount - _collateralHere); // Do not assume _withdrawHere() will withdraw exact amount. Check balance again and transfer to pool _collateralHere = collateralToken.balanceOf(address(this)); collateralToken.safeTransfer(pool, Math.min(_amount, _collateralHere)); } } function _approveToken(uint256 _amount) internal virtual { collateralToken.safeApprove(pool, _amount); } /** * @dev some strategy may want to prepare before doing migration. * Example In Maker old strategy want to give vault ownership to new strategy * @param _newStrategy . */ function _beforeMigration(address _newStrategy) internal virtual; function _rebalance() internal virtual returns ( uint256 _profit, uint256 _loss, uint256 _payback ); function _swapExactInput( address _tokenIn, address _tokenOut, uint256 _amountIn ) internal returns (uint256 _amountOut) { _amountOut = swapper.swapExactInput(_tokenIn, _tokenOut, _amountIn, 1, address(this)); } function _safeSwapExactInput( address _tokenIn, address _tokenOut, uint256 _amountIn ) internal { try swapper.swapExactInput(_tokenIn, _tokenOut, _amountIn, 1, address(this)) {} catch {} //solhint-disable no-empty-blocks } // These methods must be implemented by the inheriting strategy function _withdrawHere(uint256 _amount) internal virtual; }
// SPDX-License-Identifier: MIT pragma solidity 0.8.9; import "vesper-pools/contracts/dependencies/openzeppelin/contracts/utils/math/Math.sol"; import "vesper-pools/contracts/Errors.sol"; import "../../../interfaces/aave/IAave.sol"; /// @title This contract provide core operations for Aave abstract contract AaveV2Core { //solhint-disable-next-line const-name-snakecase StakedAave public constant stkAAVE = StakedAave(0x4da27a545c0c5B758a6BA100e3a049001de870f5); address public constant AAVE = 0x7Fc66500c84A76Ad7e9c93437bFc5Ac33E2DDaE9; AaveLendingPool public immutable aaveLendingPool; AaveProtocolDataProvider public aaveProtocolDataProvider; AaveIncentivesController public immutable aaveIncentivesController; PoolAddressesProvider internal immutable aaveAddressesProvider_; AToken internal immutable aToken; bytes32 private constant AAVE_PROVIDER_ID = 0x0100000000000000000000000000000000000000000000000000000000000000; constructor(address _receiptToken) { require(_receiptToken != address(0), Errors.INPUT_ADDRESS_IS_ZERO); aToken = AToken(_receiptToken); // If there is no AAVE incentive then below call will fail try AToken(_receiptToken).getIncentivesController() returns (address _aaveIncentivesController) { aaveIncentivesController = AaveIncentivesController(_aaveIncentivesController); } catch {} //solhint-disable no-empty-blocks aaveAddressesProvider_ = PoolAddressesProvider(0xB53C1a33016B2DC2fF3653530bfF1848a515c8c5); aaveLendingPool = AaveLendingPool(aaveAddressesProvider_.getLendingPool()); aaveProtocolDataProvider = AaveProtocolDataProvider(aaveAddressesProvider_.getAddress(AAVE_PROVIDER_ID)); } ///////////////////////// External access functions ///////////////////////// /** * @notice Initiate cooldown to unstake aave. * @dev We only want to call this function when cooldown is expired and * that's the reason we have 'if' condition. * @dev Child contract should expose this function as external and onlyKeeper */ function _startCooldown() internal returns (bool) { if (canStartCooldown()) { stkAAVE.cooldown(); return true; } return false; } /** * @notice Unstake Aave from stakedAave contract * @dev We want to unstake as soon as favorable condition exit * @dev No guarding condition thus this call can fail, if we can't unstake. * @dev Child contract should expose this function as external and onlyKeeper */ function _unstakeAave() internal { stkAAVE.redeem(address(this), type(uint256).max); } /////////////////////////////////////////////////////////////////////////// /// @notice Returns true if Aave can be unstaked function canUnstake() external view returns (bool) { (, uint256 _cooldownEnd, uint256 _unstakeEnd) = cooldownData(); return _canUnstake(_cooldownEnd, _unstakeEnd); } /// @notice Returns true if we should start cooldown function canStartCooldown() public view returns (bool) { (uint256 _cooldownStart, , uint256 _unstakeEnd) = cooldownData(); return _canStartCooldown(_cooldownStart, _unstakeEnd); } /// @notice Return cooldown related timestamps function cooldownData() public view returns ( uint256 _cooldownStart, uint256 _cooldownEnd, uint256 _unstakeEnd ) { _cooldownStart = stkAAVE.stakersCooldowns(address(this)); _cooldownEnd = _cooldownStart + stkAAVE.COOLDOWN_SECONDS(); _unstakeEnd = _cooldownEnd + stkAAVE.UNSTAKE_WINDOW(); } /** * @notice Claim Aave. Also unstake all Aave if favorable condition exits or start cooldown. * @dev If we unstake all Aave, we can't start cooldown because it requires StakedAave balance. * @dev DO NOT convert 'if else' to 2 'if's as we are reading cooldown state once to save gas. * @dev Not all collateral token has aave incentive */ function _claimAave() internal returns (uint256) { if (address(aaveIncentivesController) == address(0)) { return 0; } (uint256 _cooldownStart, uint256 _cooldownEnd, uint256 _unstakeEnd) = cooldownData(); if (_cooldownStart == 0 || block.timestamp > _unstakeEnd) { // claim stkAave when its first rebalance or unstake period passed. aaveIncentivesController.claimRewards(getAssets(), type(uint256).max, address(this)); } // Fetch and check again for next action. (_cooldownStart, _cooldownEnd, _unstakeEnd) = cooldownData(); if (_canUnstake(_cooldownEnd, _unstakeEnd)) { stkAAVE.redeem(address(this), type(uint256).max); } else if (_canStartCooldown(_cooldownStart, _unstakeEnd)) { stkAAVE.cooldown(); } stkAAVE.claimRewards(address(this), type(uint256).max); return IERC20(AAVE).balanceOf(address(this)); } /// @notice Deposit asset into Aave function _deposit(address _asset, uint256 _amount) internal { if (_amount > 0) { try aaveLendingPool.deposit(_asset, _amount, address(this), 0) {} catch Error(string memory _reason) { // Aave uses liquidityIndex and some other indexes as needed to normalize input. // If normalized input equals to 0 then error will be thrown with '56' error code. // CT_INVALID_MINT_AMOUNT = '56'; //invalid amount to mint // Hence discard error where error code is '56' require(bytes32(bytes(_reason)) == "56", "deposit failed"); } } } function getAssets() internal view returns (address[] memory) { address[] memory _assets = new address[](1); _assets[0] = address(aToken); return _assets; } /** * @notice Safe withdraw will make sure to check asking amount against available amount. * @dev Check we have enough aToken and liquidity to support this withdraw * @param _asset Address of asset to withdraw * @param _to Address that will receive collateral token. * @param _amount Amount of collateral to withdraw. * @return Actual collateral withdrawn */ function _safeWithdraw( address _asset, address _to, uint256 _amount ) internal returns (uint256) { uint256 _aTokenBalance = aToken.balanceOf(address(this)); // If Vesper becomes large liquidity provider in Aave(This happened in past in vUSDC 1.0) // In this case we might have more aToken compare to available liquidity in Aave and any // withdraw asking more than available liquidity will fail. To do safe withdraw, check // _amount against available liquidity. uint256 _availableLiquidity = IERC20(_asset).balanceOf(address(aToken)); // Get minimum of _amount, _aTokenBalance and _availableLiquidity return _withdraw(_asset, _to, Math.min(_amount, Math.min(_aTokenBalance, _availableLiquidity))); } /** * @notice Withdraw given amount of collateral from Aave to given address * @param _asset Address of asset to withdraw * @param _to Address that will receive collateral token. * @param _amount Amount of collateral to withdraw. * @return Actual collateral withdrawn */ function _withdraw( address _asset, address _to, uint256 _amount ) internal returns (uint256) { if (_amount > 0) { require(aaveLendingPool.withdraw(_asset, _amount, _to) == _amount, Errors.INCORRECT_WITHDRAW_AMOUNT); } return _amount; } /** * @dev Return true, only if we have StakedAave balance and either cooldown expired or cooldown is zero * @dev If we are in cooldown period we cannot unstake Aave. But our cooldown is still valid so we do * not want to reset/start cooldown. */ function _canStartCooldown(uint256 _cooldownStart, uint256 _unstakeEnd) internal view returns (bool) { return stkAAVE.balanceOf(address(this)) > 0 && (_cooldownStart == 0 || block.timestamp > _unstakeEnd); } /// @dev Return true, if cooldown is over and we are in unstake window. function _canUnstake(uint256 _cooldownEnd, uint256 _unstakeEnd) internal view returns (bool) { return block.timestamp > _cooldownEnd && block.timestamp <= _unstakeEnd; } /** * @notice Return total AAVE incentive allocated to this address * @dev Aave and StakedAave are 1:1 * @dev Not all collateral token has aave incentive */ function _totalAave() internal view returns (uint256) { if (address(aaveIncentivesController) == address(0)) { return 0; } // TotalAave = Get current StakedAave rewards from controller + // StakedAave balance here + // Aave rewards by staking Aave in StakedAave contract return aaveIncentivesController.getRewardsBalance(getAssets(), address(this)) + stkAAVE.balanceOf(address(this)) + stkAAVE.getTotalRewardsBalance(address(this)); } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.9; import "vesper-pools/contracts/interfaces/vesper/IPoolRewards.sol"; import "../../../interfaces/aave/IAave.sol"; import "../../Strategy.sol"; import "./AaveV2Core.sol"; // solhint-disable no-empty-blocks /// @title Deposit Collateral in Aave and earn interest by depositing borrowed token in a Vesper Pool. contract AaveV2Xy is Strategy, AaveV2Core { using SafeERC20 for IERC20; // solhint-disable-next-line var-name-mixedcase string public NAME; string public constant VERSION = "5.0.0"; uint256 internal constant MAX_BPS = 10_000; //100% uint256 public minBorrowLimit = 7_000; // 70% of actual collateral factor of protocol uint256 public maxBorrowLimit = 8_500; // 85% of actual collateral factor of protocol uint32 internal constant TWAP_PERIOD = 3600; address public rewardToken; address public borrowToken; AToken public vdToken; // Variable Debt Token address internal aBorrowToken; event UpdatedBorrowLimit( uint256 previousMinBorrowLimit, uint256 newMinBorrowLimit, uint256 previousMaxBorrowLimit, uint256 newMaxBorrowLimit ); constructor( address _pool, address _swapper, address _rewardToken, address _receiptToken, address _borrowToken, string memory _name ) Strategy(_pool, _swapper, _receiptToken) AaveV2Core(_receiptToken) { NAME = _name; rewardToken = _rewardToken; (address _aBorrowToken, , address _vdToken) = aaveProtocolDataProvider.getReserveTokensAddresses(_borrowToken); vdToken = AToken(_vdToken); borrowToken = _borrowToken; aBorrowToken = _aBorrowToken; } function isReservedToken(address _token) public view virtual override returns (bool) { return _token == address(aToken) || address(vdToken) == _token || borrowToken == _token; } /// @notice Returns total collateral locked in the strategy function tvl() external view override returns (uint256) { return aToken.balanceOf(address(this)) + collateralToken.balanceOf(address(this)); } /// @notice After borrowing Y Hook function _afterBorrowY(uint256 _amount) internal virtual {} /// @notice Approve all required tokens function _approveToken(uint256 _amount) internal virtual override { super._approveToken(_amount); collateralToken.safeApprove(address(aToken), _amount); collateralToken.safeApprove(address(aaveLendingPool), _amount); IERC20(borrowToken).safeApprove(address(aaveLendingPool), _amount); IERC20(collateralToken).safeApprove(address(swapper), _amount); IERC20(rewardToken).safeApprove(address(swapper), _amount); IERC20(borrowToken).safeApprove(address(swapper), _amount); } /** * @notice Claim rewardToken and transfer to new strategy * @param _newStrategy Address of new strategy. */ function _beforeMigration(address _newStrategy) internal virtual override { require(IStrategy(_newStrategy).token() == address(aToken), "wrong-receipt-token"); _repayY(vdToken.balanceOf(address(this))); } /// @notice Before repaying Y Hook function _beforeRepayY(uint256 _amount) internal virtual {} function _borrowY(uint256 _amount) internal virtual { if (_amount > 0) { // 2 for variable rate borrow, 0 for referralCode aaveLendingPool.borrow(borrowToken, _amount, 2, 0, address(this)); _afterBorrowY(_amount); } } /** * @notice Calculate borrow and repay amount based on current collateral and new deposit/withdraw amount. * @param _depositAmount deposit amount * @param _withdrawAmount withdraw amount * @return _borrowAmount borrow more amount * @return _repayAmount repay amount to keep ltv within limit */ function _calculateBorrowPosition(uint256 _depositAmount, uint256 _withdrawAmount) internal view returns (uint256 _borrowAmount, uint256 _repayAmount) { require(_depositAmount == 0 || _withdrawAmount == 0, "all-input-gt-zero"); uint256 _borrowed = vdToken.balanceOf(address(this)); // If maximum borrow limit set to 0 then repay borrow if (maxBorrowLimit == 0) { return (0, _borrowed); } uint256 _collateral = aToken.balanceOf(address(this)); // In case of withdraw, _amount can be greater than _supply uint256 _hypotheticalCollateral = _depositAmount > 0 ? _collateral + _depositAmount : _collateral > _withdrawAmount ? _collateral - _withdrawAmount : 0; if (_hypotheticalCollateral == 0) { return (0, _borrowed); } AaveOracle _aaveOracle = AaveOracle(aaveAddressesProvider_.getPriceOracle()); // Oracle prices are in 18 decimal uint256 _borrowTokenPrice = _aaveOracle.getAssetPrice(borrowToken); uint256 _collateralTokenPrice = _aaveOracle.getAssetPrice(address(collateralToken)); if (_borrowTokenPrice == 0 || _collateralTokenPrice == 0) { // Oracle problem. Lets payback all return (0, _borrowed); } // _collateralFactor in 4 decimal. 10_000 = 100% (, uint256 _collateralFactor, , , , , , , , ) = aaveProtocolDataProvider.getReserveConfigurationData(address(collateralToken)); // Collateral in base currency based on oracle price and cf; uint256 _actualCollateralForBorrow = (_hypotheticalCollateral * _collateralFactor * _collateralTokenPrice) / (MAX_BPS * (10**IERC20Metadata(address(collateralToken)).decimals())); // Calculate max borrow possible in borrow token number uint256 _maxBorrowPossible = (_actualCollateralForBorrow * (10**IERC20Metadata(address(borrowToken)).decimals())) / _borrowTokenPrice; if (_maxBorrowPossible == 0) { return (0, _borrowed); } // Safe buffer to avoid liquidation due to price variations. uint256 _borrowUpperBound = (_maxBorrowPossible * maxBorrowLimit) / MAX_BPS; // Borrow up to _borrowLowerBound and keep buffer of _borrowUpperBound - _borrowLowerBound for price variation uint256 _borrowLowerBound = (_maxBorrowPossible * minBorrowLimit) / MAX_BPS; // If current borrow is greater than max borrow, then repay to achieve safe position. if (_borrowed > _borrowUpperBound) { // If borrow > upperBound then it is greater than lowerBound too. _repayAmount = _borrowed - _borrowLowerBound; } else if (_borrowLowerBound > _borrowed) { _borrowAmount = _borrowLowerBound - _borrowed; uint256 _availableLiquidity = IERC20(borrowToken).balanceOf(aBorrowToken); if (_borrowAmount > _availableLiquidity) { _borrowAmount = _availableLiquidity; } } } /// @notice Deposit collateral in Aave and adjust borrow position function _deposit() internal { uint256 _collateralBalance = collateralToken.balanceOf(address(this)); (uint256 _borrowAmount, uint256 _repayAmount) = _calculateBorrowPosition(_collateralBalance, 0); if (_repayAmount > 0) { // Repay _borrowAmount to maintain safe position _repayY(_repayAmount); _mint(_collateralBalance); } else { // Happy path, mint more borrow more _mint(_collateralBalance); _borrowY(_borrowAmount); } } /// @notice Borrowed Y balance deposited here or elsewhere hook function _getInvestedBorrowBalance() internal view virtual returns (uint256) { return IERC20(borrowToken).balanceOf(address(this)); } /** * @dev Aave support WETH as collateral. */ function _mint(uint256 _amount) internal virtual { _deposit(address(collateralToken), _amount); } /** * @notice Generate report for pools accounting and also send profit and any payback to pool. * @dev Claim rewardToken and convert to collateral. */ function _rebalance() internal override returns ( uint256 _profit, uint256 _loss, uint256 _payback ) { uint256 _excessDebt = IVesperPool(pool).excessDebt(address(this)); uint256 _totalDebt = IVesperPool(pool).totalDebtOf(address(this)); // Claim rewards and convert to collateral token uint256 _aaveAmount = _claimAave(); if (_aaveAmount > 0) { _safeSwapExactInput(rewardToken, address(collateralToken), _aaveAmount); } uint256 _borrow = vdToken.balanceOf(address(this)); uint256 _investedBorrowBalance = _getInvestedBorrowBalance(); // _borrow increases every block. Convert collateral to borrowToken. if (_borrow > _investedBorrowBalance) { _swapToBorrowToken(_borrow - _investedBorrowBalance); } else { // When _investedBorrowBalance exceeds _borrow balance from Aave // Customize this hook to handle the excess borrowToken for profit _rebalanceBorrow(_investedBorrowBalance - _borrow); } uint256 _supply = aToken.balanceOf(address(this)); uint256 _collateralHere = collateralToken.balanceOf(address(this)); uint256 _totalCollateral = _supply + _collateralHere; if (_totalCollateral > _totalDebt) { _profit = _totalCollateral - _totalDebt; } else { _loss = _totalDebt - _totalCollateral; } uint256 _profitAndExcessDebt = _profit + _excessDebt; if (_collateralHere < _profitAndExcessDebt) { uint256 _totalAmountToWithdraw = Math.min((_profitAndExcessDebt - _collateralHere), _supply); if (_totalAmountToWithdraw > 0) { _withdrawHere(_totalAmountToWithdraw); _collateralHere = collateralToken.balanceOf(address(this)); } } // Make sure _collateralHere >= _payback + profit. set actual payback first and then profit _payback = Math.min(_collateralHere, _excessDebt); _profit = _collateralHere > _payback ? Math.min((_collateralHere - _payback), _profit) : 0; IVesperPool(pool).reportEarning(_profit, _loss, _payback); _deposit(); } /// @notice Swap excess borrow for more collateral hook function _rebalanceBorrow(uint256 _excessBorrow) internal virtual {} function _redeemX(uint256 _amount) internal virtual { _safeWithdraw(address(collateralToken), address(this), _amount); } function _repayY(uint256 _amount) internal virtual { _beforeRepayY(_amount); aaveLendingPool.repay(borrowToken, _amount, 2, address(this)); } /** * @dev Swap collateral token to borrowToken * @param _shortOnBorrow Expected output of this swap */ function _swapToBorrowToken(uint256 _shortOnBorrow) internal { // Looking for _amountIn using fixed output amount uint256 _amountIn = swapper.getAmountIn(address(collateralToken), borrowToken, _shortOnBorrow); if (_amountIn > 0) { uint256 _collateralHere = collateralToken.balanceOf(address(this)); if (_amountIn > _collateralHere) { // Redeem some collateral, so that we have enough collateral to get expected output _redeemX(_amountIn - _collateralHere); } swapper.swapExactOutput(address(collateralToken), borrowToken, _shortOnBorrow, _amountIn, address(this)); } } /// @dev Withdraw collateral here. Do not transfer to pool function _withdrawHere(uint256 _requireAmount) internal override { (, uint256 _repayAmount) = _calculateBorrowPosition(0, _requireAmount); if (_repayAmount > 0) { _repayY(_repayAmount); } _redeemX(_requireAmount); } /************************************************************************************************ * Governor/admin/keeper function * ***********************************************************************************************/ /** * @notice Update upper and lower borrow limit. Usually maxBorrowLimit < 100% of actual collateral factor of protocol. * @dev It is possible to set _maxBorrowLimit and _minBorrowLimit as 0 to not borrow anything * @param _minBorrowLimit It is % of actual collateral factor of protocol * @param _maxBorrowLimit It is % of actual collateral factor of protocol */ function updateBorrowLimit(uint256 _minBorrowLimit, uint256 _maxBorrowLimit) external onlyGovernor { require(_maxBorrowLimit < MAX_BPS, "invalid-max-borrow-limit"); // set _maxBorrowLimit and _minBorrowLimit to disable borrow; require( (_maxBorrowLimit == 0 && _minBorrowLimit == 0) || _maxBorrowLimit > _minBorrowLimit, "max-should-be-higher-than-min" ); emit UpdatedBorrowLimit(minBorrowLimit, _minBorrowLimit, maxBorrowLimit, _maxBorrowLimit); minBorrowLimit = _minBorrowLimit; maxBorrowLimit = _maxBorrowLimit; } }
{ "evmVersion": "london", "libraries": {}, "metadata": { "bytecodeHash": "ipfs", "useLiteralContent": true }, "optimizer": { "enabled": true, "runs": 100 }, "remappings": [], "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
Contract Security Audit
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IRoutedSwapper","name":"_swapper","type":"address"}],"name":"updateSwapper","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"vPool","outputs":[{"internalType":"contract IVesperPool","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"vdToken","outputs":[{"internalType":"contract AToken","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"vsp","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"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)
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
-----Decoded View---------------
Arg [0] : _pool (address): 0xef4F4604106de23CDadfEAE08fcC34602cB475C1
Arg [1] : _swapper (address): 0x8f156189A3CD28dFc8FB7BbbAce58F98F09c0bB3
Arg [2] : _rewardToken (address): 0x7Fc66500c84A76Ad7e9c93437bFc5Ac33E2DDaE9
Arg [3] : _receiptToken (address): 0xa06bC25B5805d5F8d82847D191Cb4Af5A3e873E0
Arg [4] : _borrowToken (address): 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48
Arg [5] : _vPool (address): 0xa8b607Aa09B6A2E306F93e74c282Fb13f6A80452
Arg [6] : _vspAddress (address): 0x1b40183EFB4Dd766f11bDa7A7c3AD8982e998421
Arg [7] : _name (string): AaveV2_Vesper_Xy_LINK_USDC
-----Encoded View---------------
10 Constructor Arguments found :
Arg [0] : 000000000000000000000000ef4f4604106de23cdadfeae08fcc34602cb475c1
Arg [1] : 0000000000000000000000008f156189a3cd28dfc8fb7bbbace58f98f09c0bb3
Arg [2] : 0000000000000000000000007fc66500c84a76ad7e9c93437bfc5ac33e2ddae9
Arg [3] : 000000000000000000000000a06bc25b5805d5f8d82847d191cb4af5a3e873e0
Arg [4] : 000000000000000000000000a0b86991c6218b36c1d19d4a2e9eb0ce3606eb48
Arg [5] : 000000000000000000000000a8b607aa09b6a2e306f93e74c282fb13f6a80452
Arg [6] : 0000000000000000000000001b40183efb4dd766f11bda7a7c3ad8982e998421
Arg [7] : 0000000000000000000000000000000000000000000000000000000000000100
Arg [8] : 000000000000000000000000000000000000000000000000000000000000001a
Arg [9] : 4161766556325f5665737065725f58795f4c494e4b5f55534443000000000000
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Multichain Portfolio | 26 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
---|---|---|---|---|---|
ETH | 100.00% | $13.82 | 4.2415 | $58.62 |
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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.