Contract Name:
WooracleV2_2
Contract Source Code:
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_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 (last updated v4.9.0) (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}
function _nonReentrantBefore() private {
// On the first call to nonReentrant, _status will be _NOT_ENTERED
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
}
function _nonReentrantAfter() private {
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
/**
* @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
* `nonReentrant` function in the call stack.
*/
function _reentrancyGuardEntered() internal view returns (bool) {
return _status == _ENTERED;
}
}
// 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) (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 v4.9.3) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../extensions/IERC20Permit.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;
/**
* @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) (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: 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-2.0-or-later
pragma solidity >=0.6.0;
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
library TransferHelper {
/// @notice Transfers tokens from the targeted address to the given destination
/// @notice Errors with 'STF' if transfer fails
/// @param token The contract address of the token to be transferred
/// @param from The originating address from which the tokens will be transferred
/// @param to The destination address of the transfer
/// @param value The amount to be transferred
function safeTransferFrom(
address token,
address from,
address to,
uint256 value
) internal {
(bool success, bytes memory data) =
token.call(abi.encodeWithSelector(IERC20.transferFrom.selector, from, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'STF');
}
/// @notice Transfers tokens from msg.sender to a recipient
/// @dev Errors with ST if transfer fails
/// @param token The contract address of the token which will be transferred
/// @param to The recipient of the transfer
/// @param value The value of the transfer
function safeTransfer(
address token,
address to,
uint256 value
) internal {
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(IERC20.transfer.selector, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'ST');
}
/// @notice Approves the stipulated contract to spend the given allowance in the given token
/// @dev Errors with 'SA' if transfer fails
/// @param token The contract address of the token to be approved
/// @param to The target of the approval
/// @param value The amount of the given token the target will be allowed to spend
function safeApprove(
address token,
address to,
uint256 value
) internal {
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(IERC20.approve.selector, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'SA');
}
/// @notice Transfers ETH to the recipient address
/// @dev Fails with `STE`
/// @param to The destination of the transfer
/// @param value The value to be transferred
function safeTransferETH(address to, uint256 value) internal {
(bool success, ) = to.call{value: value}(new bytes(0));
require(success, 'STE');
}
}
// SPDX-License-Identifier: MIT
pragma solidity =0.8.14;
interface AggregatorV3Interface {
function decimals() external view returns (uint8);
function description() external view returns (string memory);
function version() external view returns (uint256);
/// getRoundData and latestRoundData should both raise "No data present"
/// if they do not have data to report, instead of returning unset values
/// which could be misinterpreted as actual reported values.
function getRoundData(uint80 _roundId)
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
function latestRoundData()
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
}
// SPDX-License-Identifier: MIT
pragma solidity =0.8.14;
/*
░██╗░░░░░░░██╗░█████╗░░█████╗░░░░░░░███████╗██╗
░██║░░██╗░░██║██╔══██╗██╔══██╗░░░░░░██╔════╝██║
░╚██╗████╗██╔╝██║░░██║██║░░██║█████╗█████╗░░██║
░░████╔═████║░██║░░██║██║░░██║╚════╝██╔══╝░░██║
░░╚██╔╝░╚██╔╝░╚█████╔╝╚█████╔╝░░░░░░██║░░░░░██║
░░░╚═╝░░░╚═╝░░░╚════╝░░╚════╝░░░░░░░╚═╝░░░░░╚═╝
*
* MIT License
* ===========
*
* Copyright (c) 2020 WooTrade
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/// @title The oracle V2.2 interface by Woo.Network.
/// @notice update and posted the latest price info by Woo.
interface IWooracleV2_2 {
struct State {
uint128 price;
uint64 spread;
uint64 coeff;
bool woFeasible;
}
// /// @notice Wooracle spread value
// function woSpread(address base) external view returns (uint64);
// /// @notice Wooracle coeff value
// function woCoeff(address base) external view returns (uint64);
// /// @notice Wooracle state for the specified base token
// function woState(address base) external view returns (State memory);
// /// @notice Chainlink oracle address for the specified base token
// function cloAddress(address base) external view returns (address clo);
// /// @notice Wooracle price of the base token
// function woPrice(address base) external view returns (uint128 price, uint256 timestamp);
/// @notice ChainLink price of the base token / quote token
function cloPrice(address base) external view returns (uint256 price, uint256 timestamp);
/// @notice Returns Woooracle price if available, otherwise fallback to ChainLink
function price(address base) external view returns (uint256 priceNow, bool feasible);
/// @notice Updates the Wooracle price for the specified base token
function postPrice(address base, uint128 _price) external;
/// Updates the state of the given base token.
/// @param _base baseToken address
/// @param _price the new prices
/// @param _spread the new spreads
/// @param _coeff the new slippage coefficent
function postState(
address _base,
uint128 _price,
uint64 _spread,
uint64 _coeff
) external;
/// @notice State of the specified base token.
function state(address base) external view returns (State memory);
/// @notice The price decimal for the specified base token (e.g. 8)
function decimals(address base) external view returns (uint8);
/// @notice The quote token for calculating WooPP query price
function quoteToken() external view returns (address);
/// @notice last updated timestamp
function timestamp() external view returns (uint256);
/// @notice Flag for Wooracle price feasible
function isWoFeasible(address base) external view returns (bool);
// /// @notice Flag for account admin
// function isAdmin(address account) external view returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity =0.8.14;
/*
░██╗░░░░░░░██╗░█████╗░░█████╗░░░░░░░███████╗██╗
░██║░░██╗░░██║██╔══██╗██╔══██╗░░░░░░██╔════╝██║
░╚██╗████╗██╔╝██║░░██║██║░░██║█████╗█████╗░░██║
░░████╔═████║░██║░░██║██║░░██║╚════╝██╔══╝░░██║
░░╚██╔╝░╚██╔╝░╚█████╔╝╚█████╔╝░░░░░░██║░░░░░██║
░░░╚═╝░░░╚═╝░░░╚════╝░░╚════╝░░░░░░░╚═╝░░░░░╚═╝
*
* MIT License
* ===========
*
* Copyright (c) 2020 WooTrade
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
import "../interfaces/IWooracleV2_2.sol";
import "../interfaces/AggregatorV3Interface.sol";
import {TransferHelper} from "@uniswap/v3-periphery/contracts/libraries/TransferHelper.sol";
// OpenZeppelin contracts
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import {IERC20, SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
/// @title Wooracle V2.2 contract for WooPPV2
/// subversion 1 change: no timestamp update for posting price from WooPP.
/// subversion 2 change: support legacy postState utilizing block.timestamp
contract WooracleV2_2 is Ownable, IWooracleV2_2 {
/* ----- State variables ----- */
// 128 + 64 + 64 = 256 bits (slot size)
struct TokenInfo {
uint128 price; // as chainlink oracle (e.g. decimal = 8) zip: 32 bits = (27, 5)
uint64 coeff; // k: decimal = 18. 18.4 * 1e18 zip: 16 bits = (11, 5), 2^11 = 2048
uint64 spread; // s: decimal = 18. spread <= 2e18 18.4 * 1e18 zip: 16 bits = (11, 5)
}
struct CLOracle {
address oracle;
uint8 decimal;
bool cloPreferred;
}
struct PriceRange {
uint128 min;
uint128 max;
}
mapping(address => TokenInfo) public infos;
mapping(address => CLOracle) public clOracles;
mapping(address => PriceRange) public priceRanges;
address public quoteToken;
uint256 public timestamp;
uint256 public staleDuration;
uint64 public bound;
address public wooPP;
mapping(address => bool) public isAdmin;
mapping(address => bool) public isGuardian;
mapping(uint8 => address) public basesMap;
constructor() {
staleDuration = uint256(300); // default: 5 mins
bound = uint64(1e16); // 1%
}
modifier onlyAdmin() {
require(owner() == msg.sender || isAdmin[msg.sender] || msg.sender == wooPP, "WooracleV2_2: !Admin");
_;
}
modifier onlyGuardian() {
require(isGuardian[msg.sender], "WooracleV2_2: !Guardian");
_;
}
/* ----- External Functions ----- */
function setRange(
address _base,
uint128 _min,
uint128 _max
) external onlyGuardian {
PriceRange storage priceRange = priceRanges[_base];
priceRange.min = _min;
priceRange.max = _max;
}
function setWooPP(address _wooPP) external onlyAdmin {
wooPP = _wooPP;
}
function setAdmin(address _addr, bool _flag) external onlyOwner {
isAdmin[_addr] = _flag;
}
function setGuardian(address _addr, bool _flag) external onlyOwner {
isGuardian[_addr] = _flag;
}
/// @dev Set the quote token address.
/// @param _oracle the token address
function setQuoteToken(address _quote, address _oracle) external onlyAdmin {
quoteToken = _quote;
CLOracle storage cloRef = clOracles[_quote];
cloRef.oracle = _oracle;
cloRef.decimal = AggregatorV3Interface(_oracle).decimals();
}
function setBound(uint64 _bound) external onlyOwner {
bound = _bound;
}
function setCLOracle(
address _token,
address _oracle,
bool _cloPreferred
) external onlyAdmin {
CLOracle storage cloRef = clOracles[_token];
cloRef.oracle = _oracle;
cloRef.decimal = AggregatorV3Interface(_oracle).decimals();
cloRef.cloPreferred = _cloPreferred;
}
function setCloPreferred(address _token, bool _cloPreferred) external onlyAdmin {
CLOracle storage cloRef = clOracles[_token];
cloRef.cloPreferred = _cloPreferred;
}
/// @dev Set the staleDuration.
/// @param _staleDuration the new stale duration
function setStaleDuration(uint256 _staleDuration) external onlyAdmin {
staleDuration = _staleDuration;
}
/// @dev Update the base token prices.
/// @param _base the baseToken address
/// @param _price the new prices for the base token
function postPrice(address _base, uint128 _price) external onlyAdmin {
// NOTE: update spread before setting a new price
_updateSpreadForNewPrice(_base, _price);
infos[_base].price = _price;
if (msg.sender != wooPP) {
timestamp = block.timestamp;
}
}
/// @dev Update the base token prices.
/// @param _base the baseToken address
/// @param _price the new prices for the base token
/// @param _ts the manual updated TS
function postPrice(
address _base,
uint128 _price,
uint256 _ts
) external onlyAdmin {
// NOTE: update spread before setting a new price
_updateSpreadForNewPrice(_base, _price);
infos[_base].price = _price;
timestamp = _ts;
}
/// @dev batch update baseTokens prices
/// @param _bases list of baseToken address
/// @param _prices the updated prices list
function postPriceList(
address[] calldata _bases,
uint128[] calldata _prices,
uint256 _ts
) external onlyAdmin {
uint256 length = _bases.length;
require(length == _prices.length, "WooracleV2_2: length_INVALID");
for (uint256 i = 0; i < length; i++) {
// NOTE: update spread before setting a new price
_updateSpreadForNewPrice(_bases[i], _prices[i]);
infos[_bases[i]].price = _prices[i];
}
timestamp = _ts;
}
/// @dev update the state of the given base token.
/// @param _base baseToken address
/// @param _price the new prices
/// @param _spread the new spreads
/// @param _coeff the new slippage coefficent
function postState(
address _base,
uint128 _price,
uint64 _spread,
uint64 _coeff
) external onlyAdmin {
_setState(_base, _price, _spread, _coeff);
timestamp = block.timestamp;
}
/// @dev update the state of the given base token with the offchain timestamp.
/// @param _base baseToken address
/// @param _price the new prices
/// @param _spread the new spreads
/// @param _coeff the new slippage coefficent
/// @param _ts the local timestamp
function postState(
address _base,
uint128 _price,
uint64 _spread,
uint64 _coeff,
uint256 _ts
) external onlyAdmin {
_setState(_base, _price, _spread, _coeff);
timestamp = _ts;
}
/// @dev batch update the prices, spreads and slipagge coeffs info.
/// @param _bases list of baseToken address
/// @param _prices the prices list
/// @param _spreads the spreads list
/// @param _coeffs the slippage coefficent list
function postStateList(
address[] calldata _bases,
uint128[] calldata _prices,
uint64[] calldata _spreads,
uint64[] calldata _coeffs,
uint256 _ts
) external onlyAdmin {
uint256 length = _bases.length;
for (uint256 i = 0; i < length; i++) {
_setState(_bases[i], _prices[i], _spreads[i], _coeffs[i]);
}
timestamp = _ts;
}
/*
Price logic:
- woPrice: wooracle price
- cloPrice: chainlink price
woFeasible is, price > 0 and price timestamp NOT stale
when woFeasible && priceWithinBound -> woPrice, feasible
when woFeasible && !priceWithinBound -> woPrice, infeasible
when !woFeasible && clo_preferred -> cloPrice, feasible
when !woFeasible && !clo_preferred -> cloPrice, infeasible
*/
function price(address _base) public view returns (uint256 priceOut, bool feasible) {
uint256 woPrice_ = uint256(infos[_base].price);
uint256 woPriceTimestamp = timestamp;
(uint256 cloPrice_, ) = _cloPriceInQuote(_base, quoteToken);
bool woFeasible = woPrice_ != 0 && block.timestamp <= (woPriceTimestamp + staleDuration);
// bool woPriceInBound = cloPrice_ == 0 ||
// ((cloPrice_ * (1e18 - bound)) / 1e18 <= woPrice_ && woPrice_ <= (cloPrice_ * (1e18 + bound)) / 1e18);
bool woPriceInBound = cloPrice_ != 0 &&
((cloPrice_ * (1e18 - bound)) / 1e18 <= woPrice_ && woPrice_ <= (cloPrice_ * (1e18 + bound)) / 1e18);
if (woFeasible) {
priceOut = woPrice_;
feasible = woPriceInBound;
} else {
priceOut = clOracles[_base].cloPreferred ? cloPrice_ : 0;
feasible = priceOut != 0;
}
// Guardian check: min-max
if (feasible) {
PriceRange memory range = priceRanges[_base];
require(priceOut > range.min, "WooracleV2_2: !min");
require(priceOut < range.max, "WooracleV2_2: !max");
}
}
/// @notice the price decimal for the specified base token
function decimals(address) external pure returns (uint8) {
return 8;
}
function cloPrice(address _base) external view returns (uint256 refPrice, uint256 refTimestamp) {
return _cloPriceInQuote(_base, quoteToken);
}
function isWoFeasible(address _base) external view override returns (bool) {
return infos[_base].price != 0 && block.timestamp <= (timestamp + staleDuration);
}
function woState(address _base) external view returns (State memory) {
TokenInfo memory info = infos[_base];
return
State({
price: info.price,
spread: info.spread,
coeff: info.coeff,
woFeasible: (info.price != 0 && block.timestamp <= (timestamp + staleDuration))
});
}
function state(address _base) external view returns (State memory) {
TokenInfo memory info = infos[_base];
(uint256 basePrice, bool feasible) = price(_base);
return State({price: uint128(basePrice), spread: info.spread, coeff: info.coeff, woFeasible: feasible});
}
/* ----- Internal Functions ----- */
function _updateSpreadForNewPrice(address _base, uint128 _price) internal {
uint64 preS = infos[_base].spread;
uint128 preP = infos[_base].price;
if (preP == 0 || _price == 0 || preS >= 1e18) {
// previous price or current price is 0, no action is needed
return;
}
uint256 maxP = _price >= preP ? _price : preP;
uint256 minP = _price <= preP ? _price : preP;
uint256 antiS = (uint256(1e18) * 1e18 * minP) / maxP / (uint256(1e18) - preS);
if (antiS < 1e18) {
uint64 newS = uint64(1e18 - antiS);
if (newS > preS) {
infos[_base].spread = newS;
}
}
}
function _updateSpreadForNewPrice(
address _base,
uint128 _price,
uint64 _spread
) internal {
require(_spread < 1e18, "!_spread");
uint64 preS = infos[_base].spread;
uint128 preP = infos[_base].price;
if (preP == 0 || _price == 0 || preS >= 1e18) {
// previous price or current price is 0, just use _spread
infos[_base].spread = _spread;
return;
}
uint256 maxP = _price >= preP ? _price : preP;
uint256 minP = _price <= preP ? _price : preP;
uint256 antiS = (uint256(1e18) * 1e18 * minP) / maxP / (uint256(1e18) - preS);
if (antiS < 1e18) {
uint64 newS = uint64(1e18 - antiS);
infos[_base].spread = newS > _spread ? newS : _spread;
} else {
infos[_base].spread = _spread;
}
}
function _setState(
address _base,
uint128 _price,
uint64 _spread,
uint64 _coeff
) internal {
TokenInfo storage info = infos[_base];
// NOTE: update spread before setting a new price
_updateSpreadForNewPrice(_base, _price, _spread);
info.price = _price;
info.coeff = _coeff;
}
function _cloPriceInQuote(address _fromToken, address _toToken)
internal
view
returns (uint256 refPrice, uint256 refTimestamp)
{
address baseOracle = clOracles[_fromToken].oracle;
// NOTE: Only for chains where chainlink oracle is unavailable
// if (baseOracle == address(0)) {
// return (0, 0);
// }
require(baseOracle != address(0), "WooracleV2_2: !oracle");
address quoteOracle = clOracles[_toToken].oracle;
uint8 quoteDecimal = clOracles[_toToken].decimal;
(, int256 rawBaseRefPrice, , uint256 baseUpdatedAt, ) = AggregatorV3Interface(baseOracle).latestRoundData();
(, int256 rawQuoteRefPrice, , uint256 quoteUpdatedAt, ) = AggregatorV3Interface(quoteOracle).latestRoundData();
uint256 baseRefPrice = uint256(rawBaseRefPrice);
uint256 quoteRefPrice = uint256(rawQuoteRefPrice);
// NOTE: Assume wooracle token decimal is same as chainlink token decimal.
uint256 ceoff = uint256(10)**quoteDecimal;
refPrice = (baseRefPrice * ceoff) / quoteRefPrice;
refTimestamp = baseUpdatedAt >= quoteUpdatedAt ? quoteUpdatedAt : baseUpdatedAt;
}
/* ----- Zip Related Functions ----- */
function setBase(uint8 _id, address _base) external onlyAdmin {
require(getBase(_id) == address(0), "WooracleV2_2: !id_SET_ALREADY");
basesMap[_id] = _base;
}
function getBase(uint8 _id) public view returns (address) {
address[1] memory CONST_BASES = [
// mload
// NOTE: Update token address for different chains
0x039e2fB66102314Ce7b64Ce5Ce3E5183bc94aD38 // wS
];
return _id < CONST_BASES.length ? CONST_BASES[_id] : basesMap[_id];
}
// https://docs.soliditylang.org/en/v0.8.12/contracts.html#fallback-function
// prettier-ignore
fallback (bytes calldata _input) external onlyAdmin returns (bytes memory _output) {
/*
2 bit: 0: post prices,
1: post states,
2: post prices with local timestamp
3: post states with local timestamp
6 bits: length
post prices:
[price] -->
base token: 8 bites (1 byte)
price data: 32 bits = (27, 5)
post states:
[states] -->
base token: 8 bites (1 byte)
price: 32 bits (4 bytes) = (27, 5)
k coeff: 16 bits (2 bytes) = (11, 5)
s spread: 16 bits (2 bytes) = (11, 5)
4 bytes (32bits): timestamp
MAX: 2^32-1 = 4,294,967,295 = Feb 7, 2106 6:28:15 AM (~83 years away)
*/
uint256 x = _input.length;
require(x > 0, "WooracleV2_2: !calldata");
uint8 firstByte = uint8(bytes1(_input[0]));
uint8 op = firstByte >> 6; // 11000000
uint8 len = firstByte & 0x3F; // 00111111
if (op == 0 || op == 2) {
// post prices list
address base;
uint128 p;
for (uint256 i = 0; i < len; ++i) {
base = getBase(uint8(bytes1(_input[1 + i * 5:1 + i * 5 + 1])));
p = _decodePrice(uint32(bytes4(_input[1 + i * 5 + 1:1 + i * 5 + 5])));
// NOTE: update spread before setting a new price
_updateSpreadForNewPrice(base, p);
infos[base].price = p;
}
timestamp = (op == 0) ? block.timestamp : uint256(uint32(bytes4(_input[1 + len * 5:1 + len * 5 + 4])));
} else if (op == 1 || op == 3) {
// post states list
address base;
uint128 p;
uint64 s;
uint64 k;
for (uint256 i = 0; i < len; ++i) {
base = getBase(uint8(bytes1(_input[1 + i * 9:1 + i * 9 + 1])));
p = _decodePrice(uint32(bytes4(_input[1 + i * 9 + 1:1 + i * 9 + 5])));
s = _decodeKS(uint16(bytes2(_input[1 + i * 9 + 5:1 + i * 9 + 7])));
k = _decodeKS(uint16(bytes2(_input[1 + i * 9 + 7:1 + i * 9 + 9])));
_setState(base, p, s, k);
}
timestamp = (op == 1) ? block.timestamp : uint256(uint32(bytes4(_input[1 + len * 9:1 + len * 9 + 4])));
} else {
revert("WooracleV2_2: !op");
}
}
function _decodePrice(uint32 b) internal pure returns (uint128) {
return uint128((b >> 5) * (10**(b & 0x1F))); // 0x1F = 00011111
}
function _decodeKS(uint16 b) internal pure returns (uint64) {
return uint64((b >> 5) * (10**(b & 0x1F)));
}
function inCaseTokenGotStuck(address stuckToken) external onlyAdmin {
if (stuckToken == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) {
TransferHelper.safeTransferETH(owner(), address(this).balance);
} else {
uint256 amount = IERC20(stuckToken).balanceOf(address(this));
TransferHelper.safeTransfer(stuckToken, owner(), amount);
}
}
}