Contract Name:
HogAutoCompound
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 v4.7.0) (security/Pausable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
_requireNotPaused();
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
_requirePaused();
_;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Throws if the contract is paused.
*/
function _requireNotPaused() internal view virtual {
require(!paused(), "Pausable: paused");
}
/**
* @dev Throws if the contract is not paused.
*/
function _requirePaused() internal view virtual {
require(paused(), "Pausable: not paused");
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (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.
*
* ==== Security Considerations
*
* There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
* expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
* considered as an intention to spend the allowance in any specific way. The second is that because permits have
* built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
* take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
* generally recommended is:
*
* ```solidity
* function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
* try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
* doThing(..., value);
* }
*
* function doThing(..., uint256 value) public {
* token.safeTransferFrom(msg.sender, address(this), value);
* ...
* }
* ```
*
* Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
* `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
* {SafeERC20-safeTransferFrom}).
*
* Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
* contracts should have entry points that don't rely on permit.
*/
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].
*
* CAUTION: See Security Considerations above.
*/
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 (last updated v4.9.4) (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;
}
function _contextSuffixLength() internal view virtual returns (uint256) {
return 0;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/SafeMath.sol)
pragma solidity ^0.8.0;
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the subtraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {IUniswapV2Router} from "../interfaces/IUniswapV2Router.sol";
import "@openzeppelin/contracts/security/Pausable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import {IMasterChef} from "../interfaces/IMasterChef.sol";
import {IPool} from "../interfaces/IPool.sol";
import {IRouterV2} from "../interfaces/IRouterV2.sol";
/**
* @dev Implementation of a strategy to get yields from farming LP Pools in SpookySwap.
* SpookySwap is an automated market maker (“AMM”) that allows two tokens to be exchanged on Fantom's Opera Network.
*
* This strategy deposits whatever funds it receives from the vault into the selected masterChef pool.
* rewards from providing liquidity are farmed every few minutes, sold and split 50/50.
* The corresponding pair of assets are bought and more liquidity is added to the masterChef pool.
*
* Expect the amount of LP tokens you have to grow over time while you have assets deposit
*/
contract HogAutoCompound is Ownable, Pausable {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
/**
* @dev Tokens Used:
* {os} - Required for liquidity routing when doing swaps.
* {ghog} - Token generated by staking our funds.
* {lpPair} - LP Token that the strategy maximizes.
* {lpToken0, lpToken1} - Tokens that the strategy maximizes. IPool tokens.
*/
address public os = address(0xb1e25689D55734FD3ffFc939c4C3Eb52DFf8A794);
address public ghog = address(0x0e899dA2aD0817ed850ce68f7f489688E4D42D9D);
address public lpPair;
address public lpToken0;
address public lpToken1;
/**
* @dev Third Party Contracts:
* {uniRouter} - the uniRouter for target DEX
* {masterChef} - masterChef contract
* {poolId} - masterChef pool id
*/
address public uniRouter = address(0xF5F7231073b3B41c04BA655e1a7438b1a7b29c27);
address public masterChef = address(0xA7141905E2972c295577882552Bede5406dAF5EC);
uint8 public poolId;
/**
* @dev Hog Contracts:
* {treasury} - Address of the Hog treasury
* {vault} - Address of the vault that controls the strategy's funds.
*/
address public treasury;
address public vault;
/**
* @dev Distribution of fees earned. This allocations relative to the % implemented on
* Current implementation separates 5% for fees. Can be changed through the constructor
* Inputs in constructor should be ratios between the Fee and Max Fee, divisble into percents by 10000
*
* {callFee} - Percent of the totalFee reserved for the harvester (1000 = 10% of total fee: 0.5% by default)
* {treasuryFee} - Percent of the totalFee taken by maintainers of the software (9000 = 90% of total fee: 4.5% by default)
* {securityFee} - Fee taxed when a user withdraws funds. Taken to prevent flash deposit/harvest attacks.
* These funds are redistributed to stakers in the pool.
*
* {totalFee} - divided by 10,000 to determine the % fee. Set to 5% by default and
* lowered as necessary to provide users with the most competitive APY.
*
* {MAX_FEE} - Maximum fee allowed by the strategy. Hard-capped at 5%.
* {PERCENT_DIVISOR} - Constant used to safely calculate the correct percentages.
*/
uint public callFee = 1000;
uint public treasuryFee = 9000;
uint public securityFee = 10;
uint public totalFee = 450;
uint constant public MAX_FEE = 500;
uint constant public PERCENT_DIVISOR = 10000;
/**
* @dev Routes we take to swap tokens using PanghogSwap.
* {ghogToOsRoute} - Route we take to get from {ghog} into {os}.
* {ghogToLp0Route} - Route we take to get from {ghog} into {lpToken0}.
* {ghogToLp1Route} - Route we take to get from {ghog} into {lpToken1}.
*/
IRouterV2.Route[] public ghogToOsRoute;
IRouterV2.Route[] public ghogToLp0Route;
IRouterV2.Route[] public ghogToLp1Route;
// Add stable pair flag
bool public isStablePair;
/**
* {StratHarvest} Event that is fired each time someone harvests the strat.
* {TotalFeeUpdated} Event that is fired each time the total fee is updated.
* {CallFeeUpdated} Event that is fired each time the call fee is updated.
*/
event StratHarvest(address indexed harvester);
event TotalFeeUpdated(uint newFee);
event CallFeeUpdated(uint newCallFee, uint newTreasuryFee);
/**
* @dev Initializes the strategy. Sets parameters, saves routes, and gives allowances.
* @notice see documentation for each variable above its respective declaration.
*/
constructor (
address _lpPair,
uint8 _poolId,
address _vault,
address _treasury,
bool _isStablePair
) public {
lpPair = _lpPair;
poolId = _poolId;
vault = _vault;
treasury = _treasury;
isStablePair = _isStablePair;
lpToken0 = IPool(lpPair).token0();
lpToken1 = IPool(lpPair).token1();
// Initialize ghogToOsRoute
_initializeRoutes(ghog, os, _isStablePair, 1, ghogToOsRoute);
// Initialize ghogToLp0Route
if (lpToken0 == os) {
_initializeRoutes(ghog, os, _isStablePair, 1, ghogToLp0Route);
} else if (lpToken0 != ghog) {
_initializeRoutes2Step(ghog, os, lpToken0, _isStablePair, ghogToLp0Route);
}
// Initialize ghogToLp1Route
if (lpToken1 == os) {
_initializeRoutes(ghog, os, _isStablePair, 1, ghogToLp1Route);
} else if (lpToken1 != ghog) {
_initializeRoutes2Step(ghog, os, lpToken1, _isStablePair, ghogToLp1Route);
}
giveAllowances();
}
// Helper function to initialize single-step routes
function _initializeRoutes(
address from,
address to,
bool stable,
uint size,
IRouterV2.Route[] storage routes
) internal {
while(routes.length > 0) {
routes.pop();
}
routes.push(IRouterV2.Route({
from: from,
to: to,
stable: stable
}));
}
// Helper function to initialize two-step routes
function _initializeRoutes2Step(
address start,
address middle,
address end,
bool stable,
IRouterV2.Route[] storage routes
) internal {
while(routes.length > 0) {
routes.pop();
}
routes.push(IRouterV2.Route({
from: start,
to: middle,
stable: stable
}));
routes.push(IRouterV2.Route({
from: middle,
to: end,
stable: stable
}));
}
/**
* @dev Function that puts the funds to work.
* It gets called whenever someone deposits in the strategy's vault contract.
* It deposits {lpPair} in the masterChef to farm {ghog}
*/
function deposit() public whenNotPaused {
uint256 pairBal = IERC20(lpPair).balanceOf(address(this));
if (pairBal > 0) {
IMasterChef(masterChef).deposit(poolId, pairBal);
}
}
/**
* @dev Withdraws funds and sents them back to the vault.
* It withdraws {lpPair} from the masterChef.
* The available {lpPair} minus fees is returned to the vault.
*/
function withdraw(uint256 _amount) external {
require(msg.sender == vault, "!vault");
uint256 pairBal = IERC20(lpPair).balanceOf(address(this));
if (pairBal < _amount) {
IMasterChef(masterChef).withdraw(poolId, _amount.sub(pairBal));
pairBal = IERC20(lpPair).balanceOf(address(this));
}
if (pairBal > _amount) {
pairBal = _amount;
}
uint256 withdrawFee = pairBal.mul(securityFee).div(PERCENT_DIVISOR);
IERC20(lpPair).safeTransfer(vault, pairBal.sub(withdrawFee));
}
/**
* @dev Core function of the strat, in charge of collecting and re-investing rewards.
* 1. It claims rewards from the masterChef.
* 2. It charges the system fees to simplify the split.
* 3. It swaps the {ghog} token for {lpToken0} & {lpToken1}
* 4. Adds more liquidity to the pool.
* 5. It deposits the new LP tokens.
*/
function harvest() external whenNotPaused {
require(!Address.isContract(msg.sender), "!contract");
IMasterChef(masterChef).deposit(poolId, 0);
chargeFees();
addLiquidity();
deposit();
emit StratHarvest(msg.sender);
}
/**
* @dev Takes out fees from the rewards. Set by constructor
* callFeeToUser is set as a percentage of the fee,
* as is treasuryFeeToVault
*/
function chargeFees() internal {
uint256 toOs = IERC20(ghog).balanceOf(address(this)).mul(totalFee).div(PERCENT_DIVISOR);
// Get the minimum amount out (you can adjust the slippage percentage)
uint[] memory amounts = IRouterV2(uniRouter).getAmountsOut(toOs, ghogToOsRoute);
uint minAmountOut = amounts[amounts.length - 1].mul(95).div(100); // 5% slippage
IRouterV2(uniRouter).swapExactTokensForTokensSupportingFeeOnTransferTokens(
toOs,
minAmountOut, // Set minimum amount out to prevent high slippage
ghogToOsRoute,
address(this),
block.timestamp.add(600)
);
uint256 osBal = IERC20(os).balanceOf(address(this));
uint256 callFeeToUser = osBal.mul(callFee).div(PERCENT_DIVISOR);
IERC20(os).safeTransfer(msg.sender, callFeeToUser);
uint256 treasuryFeeToVault = osBal.mul(treasuryFee).div(PERCENT_DIVISOR);
IERC20(os).safeTransfer(treasury, treasuryFeeToVault);
}
/**
* @dev Swaps {ghog} for {lpToken0}, {lpToken1} & {os} using SpookySwap.
*/
function addLiquidity() internal {
uint256 ghogHalf = IERC20(ghog).balanceOf(address(this)).div(2);
if (lpToken0 != ghog) {
IRouterV2(uniRouter).swapExactTokensForTokensSupportingFeeOnTransferTokens(
ghogHalf,
0,
ghogToLp0Route,
address(this),
block.timestamp.add(600)
);
}
if (lpToken1 != ghog) {
IRouterV2(uniRouter).swapExactTokensForTokensSupportingFeeOnTransferTokens(
ghogHalf,
0,
ghogToLp1Route,
address(this),
block.timestamp.add(600)
);
}
uint256 lp0Bal = IERC20(lpToken0).balanceOf(address(this));
uint256 lp1Bal = IERC20(lpToken1).balanceOf(address(this));
IRouterV2(uniRouter).addLiquidity(
lpToken0,
lpToken1,
isStablePair,
lp0Bal,
lp1Bal,
1,
1,
address(this),
block.timestamp.add(600)
);
}
/**
* @dev Function to calculate the total underlaying {lpPair} held by the strat.
* It takes into account both the funds in hand, as the funds allocated in the masterChef.
*/
function balanceOf() public view returns (uint256) {
return balanceOfLpPair().add(balanceOfPool());
}
/**
* @dev It calculates how much {lpPair} the contract holds.
*/
function balanceOfLpPair() public view returns (uint256) {
return IERC20(lpPair).balanceOf(address(this));
}
/**
* @dev It calculates how much {lpPair} the strategy has allocated in the masterChef
*/
function balanceOfPool() public view returns (uint256) {
(uint256 _amount, ) = IMasterChef(masterChef).userInfo(poolId, address(this));
return _amount;
}
/**
* @dev Function that has to be called as part of strat migration. It sends all the available funds back to the
* vault, ready to be migrated to the new strat.
*/
function retireStrat() external {
require(msg.sender == vault, "!vault");
IMasterChef(masterChef).emergencyWithdraw(poolId);
uint256 pairBal = IERC20(lpPair).balanceOf(address(this));
IERC20(lpPair).transfer(vault, pairBal);
}
/**
* @dev Pauses deposits. Withdraws all funds from the masterChef, leaving rewards behind
*/
function panic() public onlyOwner {
pause();
IMasterChef(masterChef).withdraw(poolId, balanceOfPool());
}
/**
* @dev Pauses the strat.
*/
function pause() public onlyOwner {
_pause();
removeAllowances();
}
/**
* @dev Unpauses the strat.
*/
function unpause() external onlyOwner {
_unpause();
giveAllowances();
deposit();
}
function giveAllowances() internal {
uint256 maxUint = type(uint256).max;
IERC20(lpPair).safeApprove(masterChef, maxUint);
IERC20(ghog).safeApprove(uniRouter, maxUint);
IERC20(lpToken0).safeApprove(uniRouter, 0);
IERC20(lpToken0).safeApprove(uniRouter, maxUint);
IERC20(lpToken1).safeApprove(uniRouter, 0);
IERC20(lpToken1).safeApprove(uniRouter, maxUint);
}
function removeAllowances() internal {
IERC20(lpPair).safeApprove(masterChef, 0);
IERC20(ghog).safeApprove(uniRouter, 0);
IERC20(lpToken0).safeApprove(uniRouter, 0);
IERC20(lpToken1).safeApprove(uniRouter, 0);
}
/**
* @dev updates the total fee, capped at 5%
*/
function updateTotalFee(uint _totalFee) external onlyOwner returns (bool) {
require(_totalFee <= MAX_FEE, "Fee Too High");
totalFee = _totalFee;
emit TotalFeeUpdated(totalFee);
return true;
}
/**
* @dev updates the call fee and adjusts the treasury fee to cover the difference
*/
function updateCallFee(uint _callFee) external onlyOwner returns (bool) {
callFee = _callFee;
treasuryFee = PERCENT_DIVISOR.sub(callFee);
emit CallFeeUpdated(callFee, treasuryFee);
return true;
}
function updateTreasury(address newTreasury) external onlyOwner returns (bool) {
treasury = newTreasury;
return true;
}
// Add function to update stable status
function updateStablePair(bool _isStablePair) external onlyOwner {
isStablePair = _isStablePair;
// Update routes with new stable status
for (uint i = 0; i < ghogToOsRoute.length; i++) {
ghogToOsRoute[i].stable = _isStablePair;
}
for (uint i = 0; i < ghogToLp0Route.length; i++) {
ghogToLp0Route[i].stable = _isStablePair;
}
for (uint i = 0; i < ghogToLp1Route.length; i++) {
ghogToLp1Route[i].stable = _isStablePair;
}
}
}
pragma solidity ^0.8.0;
interface IMasterChef {
function poolLength() external view returns (uint256);
function setBooPerSecond(uint256 _rewardTokenPerSecond) external;
function getMultiplier(uint256 _from, uint256 _to) external view returns (uint256);
function pendingBOO(uint256 _pid, address _user) external view returns (uint256);
function massUpdatePools() external;
function updatePool(uint256 _pid) external;
function deposit(uint256 _pid, uint256 _amount) external;
function withdraw(uint256 _pid, uint256 _amount) external;
function userInfo(uint256 _pid, address _user) external view returns (uint256, uint256);
function emergencyWithdraw(uint256 _pid) external;
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.26;
interface IPool {
error NOT_AUTHORIZED();
error UNSTABLE_RATIO();
/// @dev safe transfer failed
error STF();
error OVERFLOW();
/// @dev skim disabled
error SD();
/// @dev insufficient liquidity minted
error ILM();
/// @dev insufficient liquidity burned
error ILB();
/// @dev insufficient output amount
error IOA();
/// @dev insufficient input amount
error IIA();
error IL();
error IT();
error K();
event Mint(address indexed sender, uint256 amount0, uint256 amount1);
event Burn(
address indexed sender,
uint256 amount0,
uint256 amount1,
address indexed to
);
event Swap(
address indexed sender,
uint256 amount0In,
uint256 amount1In,
uint256 amount0Out,
uint256 amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
/// @notice Same as prices with with an additional window argument.
/// Window = 2 means 2 * 30min (or 1 hr) between observations
/// @param tokenIn .
/// @param amountIn .
/// @param points .
/// @param window .
/// @return Array of TWAP prices
function sample(
address tokenIn,
uint256 amountIn,
uint256 points,
uint256 window
) external view returns (uint256[] memory);
function observations(uint256 index) external view returns (uint256 timestamp, uint256 reserve0Cumulative, uint256 reserve1Cumulative);
function current(address tokenIn, uint256 amountIn) external view returns (uint256 amountOut);
/// @notice Provides twap price with user configured granularity, up to the full window size
/// @param tokenIn .
/// @param amountIn .
/// @param granularity .
/// @return amountOut .
function quote(address tokenIn, uint256 amountIn, uint256 granularity) external view returns (uint256 amountOut);
/// @notice Get the number of observations recorded
function observationLength() external view returns (uint256);
/// @notice Address of token in the pool with the lower address value
function token0() external view returns (address);
/// @notice Address of token in the poool with the higher address value
function token1() external view returns (address);
/// @notice initialize the pool, called only once programatically
function initialize(
address _token0,
address _token1,
bool _stable
) external;
/// @notice calculate the current reserves of the pool and their last 'seen' timestamp
/// @return _reserve0 amount of token0 in reserves
/// @return _reserve1 amount of token1 in reserves
/// @return _blockTimestampLast the timestamp when the pool was last updated
function getReserves()
external
view
returns (
uint112 _reserve0,
uint112 _reserve1,
uint32 _blockTimestampLast
);
/// @notice mint the pair tokens (LPs)
/// @param to where to mint the LP tokens to
/// @return liquidity amount of LP tokens to mint
function mint(address to) external returns (uint256 liquidity);
/// @notice burn the pair tokens (LPs)
/// @param to where to send the underlying
/// @return amount0 amount of amount0
/// @return amount1 amount of amount1
function burn(
address to
) external returns (uint256 amount0, uint256 amount1);
/// @notice direct swap through the pool
function swap(
uint256 amount0Out,
uint256 amount1Out,
address to,
bytes calldata data
) external;
/// @notice force balances to match reserves, can be used to harvest rebases from rebasing tokens or other external factors
/// @param to where to send the excess tokens to
function skim(address to) external;
/// @notice force reserves to match balances, prevents skim excess if skim is enabled
function sync() external;
/// @notice set the pair fees contract address
function setFeeRecipient(address _pairFees) external;
/// @notice set the feesplit variable
function setFeeSplit(uint256 _feeSplit) external;
/// @notice sets the swap fee of the pair
/// @dev max of 10_000 (10%)
/// @param _fee the fee
function setFee(uint256 _fee) external;
/// @notice 'mint' the fees as LP tokens
/// @dev this is used for protocol/voter fees
function mintFee() external;
/// @notice calculates the amount of tokens to receive post swap
/// @param amountIn the token amount
/// @param tokenIn the address of the token
function getAmountOut(
uint256 amountIn,
address tokenIn
) external view returns (uint256 amountOut);
/// @notice returns various metadata about the pair
function metadata()
external
view
returns (
uint256 _decimals0,
uint256 _decimals1,
uint256 _reserve0,
uint256 _reserve1,
bool _stable,
address _token0,
address _token1
);
/// @notice returns the feeSplit of the pair
function feeSplit() external view returns (uint256);
/// @notice returns the fee of the pair
function fee() external view returns (uint256);
/// @notice returns the feeRecipient of the pair
function feeRecipient() external view returns (address);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IRouterV2 {
struct Route {
address from;
address to;
bool stable;
}
function factory() external pure returns (address);
function wETH() external pure returns (address);
function sortTokens(address tokenA, address tokenB) external pure returns (address token0, address token1);
function pairFor(address tokenA, address tokenB, bool stable) external view returns (address pair);
function quoteLiquidity(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getReserves(address tokenA, address tokenB, bool stable) external view returns (uint reserveA, uint reserveB);
function getAmountOut(uint amountIn, address tokenIn, address tokenOut) external view returns (uint amount, bool stable);
function getAmountsOut(uint amountIn, Route[] memory routes) external view returns (uint[] memory amounts);
function addLiquidity(
address tokenA,
address tokenB,
bool stable,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
bool stable,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
bool stable,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
bool stable,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
Route[] calldata routes,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(
uint amountOutMin,
Route[] calldata routes,
address to,
uint deadline
) external payable returns (uint[] memory amounts);
function swapExactTokensForETH(
uint amountIn,
uint amountOutMin,
Route[] calldata routes,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
Route[] calldata routes,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
Route[] calldata routes,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
Route[] calldata routes,
address to,
uint deadline
) external;
// Events
event Swap(address indexed sender, uint amount0In, address _tokenIn, address indexed to, bool stable);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IUniswapV2Router {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline) external payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}