Source Code
Latest 25 from a total of 65 transactions
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| Set Swap Info | 23966329 | 10 days ago | IN | 0 ETH | 0.0000597 | ||||
| Set Swap Info | 23966328 | 10 days ago | IN | 0 ETH | 0.0000652 | ||||
| Set Swap Info | 23917372 | 17 days ago | IN | 0 ETH | 0.00017984 | ||||
| Set Swap Info | 23216368 | 115 days ago | IN | 0 ETH | 0.00022019 | ||||
| Set Swap Info | 23216328 | 115 days ago | IN | 0 ETH | 0.00020308 | ||||
| Set Swap Info | 23016388 | 143 days ago | IN | 0 ETH | 0.00027713 | ||||
| Set Slippage | 22967676 | 150 days ago | IN | 0 ETH | 0.00011082 | ||||
| Set Slippage | 22967674 | 150 days ago | IN | 0 ETH | 0.00011011 | ||||
| Set Swap Info | 22924418 | 156 days ago | IN | 0 ETH | 0.00069929 | ||||
| Set Swap Info | 22924388 | 156 days ago | IN | 0 ETH | 0.00026851 | ||||
| Set Swap Info | 22873704 | 163 days ago | IN | 0 ETH | 0.00048217 | ||||
| Set Swap Info | 22808555 | 172 days ago | IN | 0 ETH | 0.00010985 | ||||
| Set Swap Info | 22145852 | 265 days ago | IN | 0 ETH | 0.00035611 | ||||
| Set Swap Info | 22046756 | 279 days ago | IN | 0 ETH | 0.00035372 | ||||
| Set Swap Info | 22046754 | 279 days ago | IN | 0 ETH | 0.00037597 | ||||
| Set Swap Info | 22046740 | 279 days ago | IN | 0 ETH | 0.00017532 | ||||
| Set Swap Info | 21830384 | 309 days ago | IN | 0 ETH | 0.00008085 | ||||
| Set Swap Info | 21830302 | 309 days ago | IN | 0 ETH | 0.000071 | ||||
| Set Swap Info | 21830284 | 309 days ago | IN | 0 ETH | 0.00005533 | ||||
| Set Swap Info | 21826828 | 310 days ago | IN | 0 ETH | 0.00005455 | ||||
| Set Swap Info | 21826802 | 310 days ago | IN | 0 ETH | 0.00006198 | ||||
| Set Swap Info | 21825055 | 310 days ago | IN | 0 ETH | 0.00043285 | ||||
| Set Swap Info | 21825052 | 310 days ago | IN | 0 ETH | 0.00100214 | ||||
| Set Swap Info | 21825051 | 310 days ago | IN | 0 ETH | 0.00011026 | ||||
| Set Swap Info | 21824202 | 310 days ago | IN | 0 ETH | 0.00058747 |
Latest 1 internal transaction
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| 0x60806040 | 18394124 | 790 days ago | Contract Creation | 0 ETH |
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Contract Name:
BeefySwapper
Compiler Version
v0.8.19+commit.7dd6d404
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;
import { SafeERC20Upgradeable } from "@openzeppelin/contracts-upgradeable/token/ERC20/utils/SafeERC20Upgradeable.sol";
import { IERC20MetadataUpgradeable } from "@openzeppelin/contracts-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol";
import { OwnableUpgradeable } from "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import { IBeefyOracle } from "../interfaces/oracle/IBeefyOracle.sol";
import { BytesLib } from "../utils/BytesLib.sol";
/// @title Beefy Swapper
/// @author Beefy, @kexley
/// @notice Centralized swapper
contract BeefySwapper is OwnableUpgradeable {
using SafeERC20Upgradeable for IERC20MetadataUpgradeable;
using BytesLib for bytes;
/// @dev Price update failed for a token
/// @param token Address of token that failed the price update
error PriceFailed(address token);
/// @dev No swap data has been set by the owner
/// @param fromToken Token to swap from
/// @param toToken Token to swap to
error NoSwapData(address fromToken, address toToken);
/// @dev Swap call failed
/// @param router Target address of the failed swap call
/// @param data Payload of the failed call
error SwapFailed(address router, bytes data);
/// @dev Not enough output was returned from the swap
/// @param amountOut Amount returned by the swap
/// @param minAmountOut Minimum amount required from the swap
error SlippageExceeded(uint256 amountOut, uint256 minAmountOut);
/// @dev Stored data for a swap
/// @param router Target address that will handle the swap
/// @param data Payload of a template swap between the two tokens
/// @param amountIndex Location in the data byte string where the amount should be overwritten
/// @param minIndex Location in the data byte string where the min amount to swap should be
/// overwritten
/// @param minAmountSign Represents the sign of the min amount to be included in the swap, any
/// negative value will encode a negative min amount (required for Balancer)
struct SwapInfo {
address router;
bytes data;
uint256 amountIndex;
uint256 minIndex;
int8 minAmountSign;
}
/// @notice Stored swap info for a token
mapping(address => mapping(address => SwapInfo)) public swapInfo;
/// @notice Oracle used to calculate the minimum output of a swap
IBeefyOracle public oracle;
/// @notice Minimum acceptable percentage slippage output in 18 decimals
uint256 public slippage;
/// @notice Swap between two tokens
/// @param caller Address of the caller of the swap
/// @param fromToken Address of the source token
/// @param toToken Address of the destination token
/// @param amountIn Amount of source token inputted to the swap
/// @param amountOut Amount of destination token outputted from the swap
event Swap(
address indexed caller,
address indexed fromToken,
address indexed toToken,
uint256 amountIn,
uint256 amountOut
);
/// @notice Set new swap info for the route between two tokens
/// @param fromToken Address of the source token
/// @param toToken Address of the destination token
/// @param swapInfo Struct of stored swap information for the pair of tokens
event SetSwapInfo(address indexed fromToken, address indexed toToken, SwapInfo swapInfo);
/// @notice Set a new oracle
/// @param oracle New oracle address
event SetOracle(address oracle);
/// @notice Set a new slippage
/// @param slippage New slippage amount
event SetSlippage(uint256 slippage);
/// @notice Initialize the contract
/// @dev Ownership is transferred to msg.sender
/// @param _oracle Oracle to find prices for tokens
/// @param _slippage Acceptable slippage for any swap
function initialize(address _oracle, uint256 _slippage) external initializer {
__Ownable_init();
oracle = IBeefyOracle(_oracle);
slippage = _slippage;
}
/// @notice Swap between two tokens with slippage calculated using the oracle
/// @dev Caller must have already approved this contract to spend the _fromToken. After the
/// swap the _toToken token is sent directly to the caller
/// @param _fromToken Token to swap from
/// @param _toToken Token to swap to
/// @param _amountIn Amount of _fromToken to use in the swap
/// @return amountOut Amount of _toToken returned to the caller
function swap(
address _fromToken,
address _toToken,
uint256 _amountIn
) external returns (uint256 amountOut) {
uint256 minAmountOut = _getAmountOut(_fromToken, _toToken, _amountIn);
amountOut = _swap(_fromToken, _toToken, _amountIn, minAmountOut);
}
/// @notice Swap between two tokens with slippage provided by the caller
/// @dev Caller must have already approved this contract to spend the _fromToken. After the
/// swap the _toToken token is sent directly to the caller
/// @param _fromToken Token to swap from
/// @param _toToken Token to swap to
/// @param _amountIn Amount of _fromToken to use in the swap
/// @param _minAmountOut Minimum amount of _toToken that is acceptable to be returned to caller
/// @return amountOut Amount of _toToken returned to the caller
function swap(
address _fromToken,
address _toToken,
uint256 _amountIn,
uint256 _minAmountOut
) external returns (uint256 amountOut) {
amountOut = _swap(_fromToken, _toToken, _amountIn, _minAmountOut);
}
/// @notice Get the amount out from a simulated swap with slippage and non-fresh prices
/// @param _fromToken Token to swap from
/// @param _toToken Token to swap to
/// @param _amountIn Amount of _fromToken to use in the swap
/// @return amountOut Amount of _toTokens returned from the swap
function getAmountOut(
address _fromToken,
address _toToken,
uint256 _amountIn
) external view returns (uint256 amountOut) {
(uint256 fromPrice, uint256 toPrice) =
(oracle.getPrice(_fromToken), oracle.getPrice(_toToken));
uint8 decimals0 = IERC20MetadataUpgradeable(_fromToken).decimals();
uint8 decimals1 = IERC20MetadataUpgradeable(_toToken).decimals();
amountOut = _calculateAmountOut(_amountIn, fromPrice, toPrice, decimals0, decimals1);
}
/// @dev Use the oracle to get prices for both _fromToken and _toToken and calculate the
/// estimated output reduced by the slippage
/// @param _fromToken Token to swap from
/// @param _toToken Token to swap to
/// @param _amountIn Amount of _fromToken to use in the swap
/// @return amountOut Amount of _toToken returned by the swap
function _getAmountOut(
address _fromToken,
address _toToken,
uint256 _amountIn
) private returns (uint256 amountOut) {
(uint256 fromPrice, uint256 toPrice) = _getFreshPrice(_fromToken, _toToken);
uint8 decimals0 = IERC20MetadataUpgradeable(_fromToken).decimals();
uint8 decimals1 = IERC20MetadataUpgradeable(_toToken).decimals();
uint256 slippedAmountIn = _amountIn * slippage / 1 ether;
amountOut = _calculateAmountOut(slippedAmountIn, fromPrice, toPrice, decimals0, decimals1);
}
/// @dev _fromToken is pulled into this contract from the caller, swap is executed according to
/// the stored data, resulting _toTokens are sent to the caller
/// @param _fromToken Token to swap from
/// @param _toToken Token to swap to
/// @param _amountIn Amount of _fromToken to use in the swap
/// @param _minAmountOut Minimum amount of _toToken that is acceptable to be returned to caller
/// @return amountOut Amount of _toToken returned to the caller
function _swap(
address _fromToken,
address _toToken,
uint256 _amountIn,
uint256 _minAmountOut
) private returns (uint256 amountOut) {
IERC20MetadataUpgradeable(_fromToken).safeTransferFrom(msg.sender, address(this), _amountIn);
_executeSwap(_fromToken, _toToken, _amountIn, _minAmountOut);
amountOut = IERC20MetadataUpgradeable(_toToken).balanceOf(address(this));
if (amountOut < _minAmountOut) revert SlippageExceeded(amountOut, _minAmountOut);
IERC20MetadataUpgradeable(_toToken).safeTransfer(msg.sender, amountOut);
emit Swap(msg.sender, _fromToken, _toToken, _amountIn, amountOut);
}
/// @dev Fetch the stored swap info for the route between the two tokens, insert the encoded
/// balance and minimum output to the payload and call the stored router with the data
/// @param _fromToken Token to swap from
/// @param _toToken Token to swap to
/// @param _amountIn Amount of _fromToken to use in the swap
/// @param _minAmountOut Minimum amount of _toToken that is acceptable to be returned to caller
function _executeSwap(
address _fromToken,
address _toToken,
uint256 _amountIn,
uint256 _minAmountOut
) private {
SwapInfo memory swapData = swapInfo[_fromToken][_toToken];
address router = swapData.router;
if (router == address(0)) revert NoSwapData(_fromToken, _toToken);
bytes memory data = swapData.data;
data = _insertData(data, swapData.amountIndex, abi.encode(_amountIn));
bytes memory minAmountData = swapData.minAmountSign >= 0
? abi.encode(_minAmountOut)
: abi.encode(-int256(_minAmountOut));
data = _insertData(data, swapData.minIndex, minAmountData);
IERC20MetadataUpgradeable(_fromToken).forceApprove(router, type(uint256).max);
(bool success,) = router.call(data);
if (!success) revert SwapFailed(router, data);
}
/// @dev Helper function to insert data to an in-memory bytes string
/// @param _data Template swap payload with blank spaces to overwrite
/// @param _index Start location in the data byte string where the _newData should overwrite
/// @param _newData New data that is to be inserted
/// @return data The resulting string from the insertion
function _insertData(
bytes memory _data,
uint256 _index,
bytes memory _newData
) private pure returns (bytes memory data) {
data = bytes.concat(
bytes.concat(
_data.slice(0, _index),
_newData
),
_data.slice(_index + 32, _data.length - (_index + 32))
);
}
/// @dev Fetch fresh prices from the oracle
/// @param _fromToken Token to swap from
/// @param _toToken Token to swap to
/// @return fromPrice Price of token to swap from
/// @return toPrice Price of token to swap to
function _getFreshPrice(
address _fromToken,
address _toToken
) private returns (uint256 fromPrice, uint256 toPrice) {
bool success;
(fromPrice, success) = oracle.getFreshPrice(_fromToken);
if (!success) revert PriceFailed(_fromToken);
(toPrice, success) = oracle.getFreshPrice(_toToken);
if (!success) revert PriceFailed(_toToken);
}
/// @dev Calculate the amount out given the prices and the decimals of the tokens involved
/// @param _amountIn Amount of _fromToken to use in the swap
/// @param _price0 Price of the _fromToken
/// @param _price1 Price of the _toToken
/// @param _decimals0 Decimals of the _fromToken
/// @param _decimals1 Decimals of the _toToken
function _calculateAmountOut(
uint256 _amountIn,
uint256 _price0,
uint256 _price1,
uint8 _decimals0,
uint8 _decimals1
) private pure returns (uint256 amountOut) {
amountOut = _amountIn * (_price0 * 10 ** _decimals1) / (_price1 * 10 ** _decimals0);
}
/* ----------------------------------- OWNER FUNCTIONS ----------------------------------- */
/// @notice Owner function to set the stored swap info for the route between two tokens
/// @dev No validation checks
/// @param _fromToken Token to swap from
/// @param _toToken Token to swap to
/// @param _swapInfo Swap info to store
function setSwapInfo(
address _fromToken,
address _toToken,
SwapInfo calldata _swapInfo
) external onlyOwner {
swapInfo[_fromToken][_toToken] = _swapInfo;
emit SetSwapInfo(_fromToken, _toToken, _swapInfo);
}
/// @notice Owner function to set multiple stored swap info for the routes between two tokens
/// @dev No validation checks
/// @param _fromTokens Tokens to swap from
/// @param _toTokens Tokens to swap to
/// @param _swapInfos Swap infos to store
function setSwapInfos(
address[] calldata _fromTokens,
address[] calldata _toTokens,
SwapInfo[] calldata _swapInfos
) external onlyOwner {
uint256 tokenLength = _fromTokens.length;
for (uint i; i < tokenLength;) {
swapInfo[_fromTokens[i]][_toTokens[i]] = _swapInfos[i];
emit SetSwapInfo(_fromTokens[i], _toTokens[i], _swapInfos[i]);
unchecked { ++i; }
}
}
/// @notice Owner function to set the oracle used to calculate the minimum outputs
/// @dev No validation checks
/// @param _oracle Address of the new oracle
function setOracle(address _oracle) external onlyOwner {
oracle = IBeefyOracle(_oracle);
emit SetOracle(_oracle);
}
/// @notice Owner function to set the slippage
/// @param _slippage Acceptable slippage level
function setSlippage(uint256 _slippage) external onlyOwner {
if (_slippage > 1 ether) _slippage = 1 ether;
slippage = _slippage;
emit SetSlippage(_slippage);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.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 OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal onlyInitializing {
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal onlyInitializing {
_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);
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[49] private __gap;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)
pragma solidity ^0.8.2;
import "../../utils/AddressUpgradeable.sol";
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
* reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
* case an upgrade adds a module that needs to be initialized.
*
* For example:
*
* [.hljs-theme-light.nopadding]
* ```solidity
* contract MyToken is ERC20Upgradeable {
* function initialize() initializer public {
* __ERC20_init("MyToken", "MTK");
* }
* }
*
* contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
* function initializeV2() reinitializer(2) public {
* __ERC20Permit_init("MyToken");
* }
* }
* ```
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*
* [CAUTION]
* ====
* Avoid leaving a contract uninitialized.
*
* An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
* contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
* the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
*
* [.hljs-theme-light.nopadding]
* ```
* /// @custom:oz-upgrades-unsafe-allow constructor
* constructor() {
* _disableInitializers();
* }
* ```
* ====
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
* @custom:oz-retyped-from bool
*/
uint8 private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Triggered when the contract has been initialized or reinitialized.
*/
event Initialized(uint8 version);
/**
* @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
* `onlyInitializing` functions can be used to initialize parent contracts.
*
* Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a
* constructor.
*
* Emits an {Initialized} event.
*/
modifier initializer() {
bool isTopLevelCall = !_initializing;
require(
(isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
"Initializable: contract is already initialized"
);
_initialized = 1;
if (isTopLevelCall) {
_initializing = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
emit Initialized(1);
}
}
/**
* @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
* contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
* used to initialize parent contracts.
*
* A reinitializer may be used after the original initialization step. This is essential to configure modules that
* are added through upgrades and that require initialization.
*
* When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
* cannot be nested. If one is invoked in the context of another, execution will revert.
*
* Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
* a contract, executing them in the right order is up to the developer or operator.
*
* WARNING: setting the version to 255 will prevent any future reinitialization.
*
* Emits an {Initialized} event.
*/
modifier reinitializer(uint8 version) {
require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
_initialized = version;
_initializing = true;
_;
_initializing = false;
emit Initialized(version);
}
/**
* @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
* {initializer} and {reinitializer} modifiers, directly or indirectly.
*/
modifier onlyInitializing() {
require(_initializing, "Initializable: contract is not initializing");
_;
}
/**
* @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
* Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
* to any version. It is recommended to use this to lock implementation contracts that are designed to be called
* through proxies.
*
* Emits an {Initialized} event the first time it is successfully executed.
*/
function _disableInitializers() internal virtual {
require(!_initializing, "Initializable: contract is initializing");
if (_initialized != type(uint8).max) {
_initialized = type(uint8).max;
emit Initialized(type(uint8).max);
}
}
/**
* @dev Returns the highest version that has been initialized. See {reinitializer}.
*/
function _getInitializedVersion() internal view returns (uint8) {
return _initialized;
}
/**
* @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
*/
function _isInitializing() internal view returns (bool) {
return _initializing;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC20Upgradeable.sol";
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20MetadataUpgradeable is IERC20Upgradeable {
/**
* @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
// 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 IERC20PermitUpgradeable {
/**
* @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 IERC20Upgradeable {
/**
* @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 "../IERC20Upgradeable.sol";
import "../extensions/IERC20PermitUpgradeable.sol";
import "../../../utils/AddressUpgradeable.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 SafeERC20Upgradeable {
using AddressUpgradeable 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(IERC20Upgradeable 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(IERC20Upgradeable 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(IERC20Upgradeable 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(IERC20Upgradeable 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(IERC20Upgradeable 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(IERC20Upgradeable 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(
IERC20PermitUpgradeable 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(IERC20Upgradeable 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(IERC20Upgradeable 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))) && AddressUpgradeable.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 AddressUpgradeable {
/**
* @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;
import "../proxy/utils/Initializable.sol";
/**
* @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 ContextUpgradeable is Initializable {
function __Context_init() internal onlyInitializing {
}
function __Context_init_unchained() internal onlyInitializing {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IBeefyOracle {
function getPrice(address token) external view returns (uint256 price);
function getPrice(address[] calldata tokens) external view returns (uint256[] memory prices);
function getFreshPrice(address token) external returns (uint256 price, bool success);
function getFreshPrice(address[] calldata tokens) external returns (uint256[] memory prices, bool[] memory successes);
}// SPDX-License-Identifier: Unlicense /* * @title Solidity Bytes Arrays Utils * @author Gonçalo Sá <[email protected]> * * @dev Bytes tightly packed arrays utility library for ethereum contracts written in Solidity. * The library lets you concatenate, slice and type cast bytes arrays both in memory and storage. */ pragma solidity >=0.8.0 <0.9.0; library BytesLib { function concat( bytes memory _preBytes, bytes memory _postBytes ) internal pure returns (bytes memory) { bytes memory tempBytes; assembly { // Get a location of some free memory and store it in tempBytes as // Solidity does for memory variables. tempBytes := mload(0x40) // Store the length of the first bytes array at the beginning of // the memory for tempBytes. let length := mload(_preBytes) mstore(tempBytes, length) // Maintain a memory counter for the current write location in the // temp bytes array by adding the 32 bytes for the array length to // the starting location. let mc := add(tempBytes, 0x20) // Stop copying when the memory counter reaches the length of the // first bytes array. let end := add(mc, length) for { // Initialize a copy counter to the start of the _preBytes data, // 32 bytes into its memory. let cc := add(_preBytes, 0x20) } lt(mc, end) { // Increase both counters by 32 bytes each iteration. mc := add(mc, 0x20) cc := add(cc, 0x20) } { // Write the _preBytes data into the tempBytes memory 32 bytes // at a time. mstore(mc, mload(cc)) } // Add the length of _postBytes to the current length of tempBytes // and store it as the new length in the first 32 bytes of the // tempBytes memory. length := mload(_postBytes) mstore(tempBytes, add(length, mload(tempBytes))) // Move the memory counter back from a multiple of 0x20 to the // actual end of the _preBytes data. mc := end // Stop copying when the memory counter reaches the new combined // length of the arrays. end := add(mc, length) for { let cc := add(_postBytes, 0x20) } lt(mc, end) { mc := add(mc, 0x20) cc := add(cc, 0x20) } { mstore(mc, mload(cc)) } // Update the free-memory pointer by padding our last write location // to 32 bytes: add 31 bytes to the end of tempBytes to move to the // next 32 byte block, then round down to the nearest multiple of // 32. If the sum of the length of the two arrays is zero then add // one before rounding down to leave a blank 32 bytes (the length block with 0). mstore(0x40, and( add(add(end, iszero(add(length, mload(_preBytes)))), 31), not(31) // Round down to the nearest 32 bytes. )) } return tempBytes; } function concatStorage(bytes storage _preBytes, bytes memory _postBytes) internal { assembly { // Read the first 32 bytes of _preBytes storage, which is the length // of the array. (We don't need to use the offset into the slot // because arrays use the entire slot.) let fslot := sload(_preBytes.slot) // Arrays of 31 bytes or less have an even value in their slot, // while longer arrays have an odd value. The actual length is // the slot divided by two for odd values, and the lowest order // byte divided by two for even values. // If the slot is even, bitwise and the slot with 255 and divide by // two to get the length. If the slot is odd, bitwise and the slot // with -1 and divide by two. let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2) let mlength := mload(_postBytes) let newlength := add(slength, mlength) // slength can contain both the length and contents of the array // if length < 32 bytes so let's prepare for that // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage switch add(lt(slength, 32), lt(newlength, 32)) case 2 { // Since the new array still fits in the slot, we just need to // update the contents of the slot. // uint256(bytes_storage) = uint256(bytes_storage) + uint256(bytes_memory) + new_length sstore( _preBytes.slot, // all the modifications to the slot are inside this // next block add( // we can just add to the slot contents because the // bytes we want to change are the LSBs fslot, add( mul( div( // load the bytes from memory mload(add(_postBytes, 0x20)), // zero all bytes to the right exp(0x100, sub(32, mlength)) ), // and now shift left the number of bytes to // leave space for the length in the slot exp(0x100, sub(32, newlength)) ), // increase length by the double of the memory // bytes length mul(mlength, 2) ) ) ) } case 1 { // The stored value fits in the slot, but the combined value // will exceed it. // get the keccak hash to get the contents of the array mstore(0x0, _preBytes.slot) let sc := add(keccak256(0x0, 0x20), div(slength, 32)) // save new length sstore(_preBytes.slot, add(mul(newlength, 2), 1)) // The contents of the _postBytes array start 32 bytes into // the structure. Our first read should obtain the `submod` // bytes that can fit into the unused space in the last word // of the stored array. To get this, we read 32 bytes starting // from `submod`, so the data we read overlaps with the array // contents by `submod` bytes. Masking the lowest-order // `submod` bytes allows us to add that value directly to the // stored value. let submod := sub(32, slength) let mc := add(_postBytes, submod) let end := add(_postBytes, mlength) let mask := sub(exp(0x100, submod), 1) sstore( sc, add( and( fslot, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff00 ), and(mload(mc), mask) ) ) for { mc := add(mc, 0x20) sc := add(sc, 1) } lt(mc, end) { sc := add(sc, 1) mc := add(mc, 0x20) } { sstore(sc, mload(mc)) } mask := exp(0x100, sub(mc, end)) sstore(sc, mul(div(mload(mc), mask), mask)) } default { // get the keccak hash to get the contents of the array mstore(0x0, _preBytes.slot) // Start copying to the last used word of the stored array. let sc := add(keccak256(0x0, 0x20), div(slength, 32)) // save new length sstore(_preBytes.slot, add(mul(newlength, 2), 1)) // Copy over the first `submod` bytes of the new data as in // case 1 above. let slengthmod := mod(slength, 32) let mlengthmod := mod(mlength, 32) let submod := sub(32, slengthmod) let mc := add(_postBytes, submod) let end := add(_postBytes, mlength) let mask := sub(exp(0x100, submod), 1) sstore(sc, add(sload(sc), and(mload(mc), mask))) for { sc := add(sc, 1) mc := add(mc, 0x20) } lt(mc, end) { sc := add(sc, 1) mc := add(mc, 0x20) } { sstore(sc, mload(mc)) } mask := exp(0x100, sub(mc, end)) sstore(sc, mul(div(mload(mc), mask), mask)) } } } function slice( bytes memory _bytes, uint256 _start, uint256 _length ) internal pure returns (bytes memory) { require(_length + 31 >= _length, "slice_overflow"); require(_bytes.length >= _start + _length, "slice_outOfBounds"); bytes memory tempBytes; assembly { switch iszero(_length) case 0 { // Get a location of some free memory and store it in tempBytes as // Solidity does for memory variables. tempBytes := mload(0x40) // The first word of the slice result is potentially a partial // word read from the original array. To read it, we calculate // the length of that partial word and start copying that many // bytes into the array. The first word we copy will start with // data we don't care about, but the last `lengthmod` bytes will // land at the beginning of the contents of the new array. When // we're done copying, we overwrite the full first word with // the actual length of the slice. let lengthmod := and(_length, 31) // The multiplication in the next line is necessary // because when slicing multiples of 32 bytes (lengthmod == 0) // the following copy loop was copying the origin's length // and then ending prematurely not copying everything it should. let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod))) let end := add(mc, _length) for { // The multiplication in the next line has the same exact purpose // as the one above. let cc := add(add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))), _start) } lt(mc, end) { mc := add(mc, 0x20) cc := add(cc, 0x20) } { mstore(mc, mload(cc)) } mstore(tempBytes, _length) //update free-memory pointer //allocating the array padded to 32 bytes like the compiler does now mstore(0x40, and(add(mc, 31), not(31))) } //if we want a zero-length slice let's just return a zero-length array default { tempBytes := mload(0x40) //zero out the 32 bytes slice we are about to return //we need to do it because Solidity does not garbage collect mstore(tempBytes, 0) mstore(0x40, add(tempBytes, 0x20)) } } return tempBytes; } function toAddress(bytes memory _bytes, uint256 _start) internal pure returns (address) { require(_bytes.length >= _start + 20, "toAddress_outOfBounds"); address tempAddress; assembly { tempAddress := div(mload(add(add(_bytes, 0x20), _start)), 0x1000000000000000000000000) } return tempAddress; } function toUint8(bytes memory _bytes, uint256 _start) internal pure returns (uint8) { require(_bytes.length >= _start + 1 , "toUint8_outOfBounds"); uint8 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x1), _start)) } return tempUint; } function toUint16(bytes memory _bytes, uint256 _start) internal pure returns (uint16) { require(_bytes.length >= _start + 2, "toUint16_outOfBounds"); uint16 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x2), _start)) } return tempUint; } function toUint24(bytes memory _bytes, uint256 _start) internal pure returns (uint24) { require(_start + 3 >= _start, 'toUint24_overflow'); require(_bytes.length >= _start + 3, 'toUint24_outOfBounds'); uint24 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x3), _start)) } return tempUint; } function toUint32(bytes memory _bytes, uint256 _start) internal pure returns (uint32) { require(_bytes.length >= _start + 4, "toUint32_outOfBounds"); uint32 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x4), _start)) } return tempUint; } function toUint64(bytes memory _bytes, uint256 _start) internal pure returns (uint64) { require(_bytes.length >= _start + 8, "toUint64_outOfBounds"); uint64 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x8), _start)) } return tempUint; } function toUint96(bytes memory _bytes, uint256 _start) internal pure returns (uint96) { require(_bytes.length >= _start + 12, "toUint96_outOfBounds"); uint96 tempUint; assembly { tempUint := mload(add(add(_bytes, 0xc), _start)) } return tempUint; } function toUint128(bytes memory _bytes, uint256 _start) internal pure returns (uint128) { require(_bytes.length >= _start + 16, "toUint128_outOfBounds"); uint128 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x10), _start)) } return tempUint; } function toUint256(bytes memory _bytes, uint256 _start) internal pure returns (uint256) { require(_bytes.length >= _start + 32, "toUint256_outOfBounds"); uint256 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x20), _start)) } return tempUint; } function toBytes32(bytes memory _bytes, uint256 _start) internal pure returns (bytes32) { require(_bytes.length >= _start + 32, "toBytes32_outOfBounds"); bytes32 tempBytes32; assembly { tempBytes32 := mload(add(add(_bytes, 0x20), _start)) } return tempBytes32; } function equal(bytes memory _preBytes, bytes memory _postBytes) internal pure returns (bool) { bool success = true; assembly { let length := mload(_preBytes) // if lengths don't match the arrays are not equal switch eq(length, mload(_postBytes)) case 1 { // cb is a circuit breaker in the for loop since there's // no said feature for inline assembly loops // cb = 1 - don't breaker // cb = 0 - break let cb := 1 let mc := add(_preBytes, 0x20) let end := add(mc, length) for { let cc := add(_postBytes, 0x20) // the next line is the loop condition: // while(uint256(mc < end) + cb == 2) } eq(add(lt(mc, end), cb), 2) { mc := add(mc, 0x20) cc := add(cc, 0x20) } { // if any of these checks fails then arrays are not equal if iszero(eq(mload(mc), mload(cc))) { // unsuccess: success := 0 cb := 0 } } } default { // unsuccess: success := 0 } } return success; } function equalStorage( bytes storage _preBytes, bytes memory _postBytes ) internal view returns (bool) { bool success = true; assembly { // we know _preBytes_offset is 0 let fslot := sload(_preBytes.slot) // Decode the length of the stored array like in concatStorage(). let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2) let mlength := mload(_postBytes) // if lengths don't match the arrays are not equal switch eq(slength, mlength) case 1 { // slength can contain both the length and contents of the array // if length < 32 bytes so let's prepare for that // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage if iszero(iszero(slength)) { switch lt(slength, 32) case 1 { // blank the last byte which is the length fslot := mul(div(fslot, 0x100), 0x100) if iszero(eq(fslot, mload(add(_postBytes, 0x20)))) { // unsuccess: success := 0 } } default { // cb is a circuit breaker in the for loop since there's // no said feature for inline assembly loops // cb = 1 - don't breaker // cb = 0 - break let cb := 1 // get the keccak hash to get the contents of the array mstore(0x0, _preBytes.slot) let sc := keccak256(0x0, 0x20) let mc := add(_postBytes, 0x20) let end := add(mc, mlength) // the next line is the loop condition: // while(uint256(mc < end) + cb == 2) for {} eq(add(lt(mc, end), cb), 2) { sc := add(sc, 1) mc := add(mc, 0x20) } { if iszero(eq(sload(sc), mload(mc))) { // unsuccess: success := 0 cb := 0 } } } } } default { // unsuccess: success := 0 } } return success; } }
{
"optimizer": {
"enabled": true,
"runs": 200
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
},
"libraries": {}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
Contract ABI
API[{"inputs":[{"internalType":"address","name":"fromToken","type":"address"},{"internalType":"address","name":"toToken","type":"address"}],"name":"NoSwapData","type":"error"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"PriceFailed","type":"error"},{"inputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"uint256","name":"minAmountOut","type":"uint256"}],"name":"SlippageExceeded","type":"error"},{"inputs":[{"internalType":"address","name":"router","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"SwapFailed","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint8","name":"version","type":"uint8"}],"name":"Initialized","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"oracle","type":"address"}],"name":"SetOracle","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"slippage","type":"uint256"}],"name":"SetSlippage","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"fromToken","type":"address"},{"indexed":true,"internalType":"address","name":"toToken","type":"address"},{"components":[{"internalType":"address","name":"router","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"uint256","name":"amountIndex","type":"uint256"},{"internalType":"uint256","name":"minIndex","type":"uint256"},{"internalType":"int8","name":"minAmountSign","type":"int8"}],"indexed":false,"internalType":"struct BeefySwapper.SwapInfo","name":"swapInfo","type":"tuple"}],"name":"SetSwapInfo","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"caller","type":"address"},{"indexed":true,"internalType":"address","name":"fromToken","type":"address"},{"indexed":true,"internalType":"address","name":"toToken","type":"address"},{"indexed":false,"internalType":"uint256","name":"amountIn","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amountOut","type":"uint256"}],"name":"Swap","type":"event"},{"inputs":[{"internalType":"address","name":"_fromToken","type":"address"},{"internalType":"address","name":"_toToken","type":"address"},{"internalType":"uint256","name":"_amountIn","type":"uint256"}],"name":"getAmountOut","outputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_oracle","type":"address"},{"internalType":"uint256","name":"_slippage","type":"uint256"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"oracle","outputs":[{"internalType":"contract IBeefyOracle","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_oracle","type":"address"}],"name":"setOracle","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_slippage","type":"uint256"}],"name":"setSlippage","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_fromToken","type":"address"},{"internalType":"address","name":"_toToken","type":"address"},{"components":[{"internalType":"address","name":"router","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"uint256","name":"amountIndex","type":"uint256"},{"internalType":"uint256","name":"minIndex","type":"uint256"},{"internalType":"int8","name":"minAmountSign","type":"int8"}],"internalType":"struct BeefySwapper.SwapInfo","name":"_swapInfo","type":"tuple"}],"name":"setSwapInfo","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"_fromTokens","type":"address[]"},{"internalType":"address[]","name":"_toTokens","type":"address[]"},{"components":[{"internalType":"address","name":"router","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"uint256","name":"amountIndex","type":"uint256"},{"internalType":"uint256","name":"minIndex","type":"uint256"},{"internalType":"int8","name":"minAmountSign","type":"int8"}],"internalType":"struct BeefySwapper.SwapInfo[]","name":"_swapInfos","type":"tuple[]"}],"name":"setSwapInfos","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"slippage","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_fromToken","type":"address"},{"internalType":"address","name":"_toToken","type":"address"},{"internalType":"uint256","name":"_amountIn","type":"uint256"}],"name":"swap","outputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_fromToken","type":"address"},{"internalType":"address","name":"_toToken","type":"address"},{"internalType":"uint256","name":"_amountIn","type":"uint256"},{"internalType":"uint256","name":"_minAmountOut","type":"uint256"}],"name":"swap","outputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"swapInfo","outputs":[{"internalType":"address","name":"router","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"uint256","name":"amountIndex","type":"uint256"},{"internalType":"uint256","name":"minIndex","type":"uint256"},{"internalType":"int8","name":"minAmountSign","type":"int8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]Contract 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Multichain Portfolio | 34 Chains
| Chain | Token | Portfolio % | Price | Amount | Value |
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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.