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| Set Claim For Se... | 4293395 | 118 days ago | IN | 0 ETH | 0.00000006 | ||||
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Contract Name:
YearnYieldSplitter
Compiler Version
v0.8.23+commit.f704f362
Optimization Enabled:
Yes with 200 runs
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default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.8.18 ^0.8.0 ^0.8.1 ^0.8.18;
// lib/openzeppelin-contracts/contracts/security/ReentrancyGuard.sol
// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}
function _nonReentrantBefore() private {
// On the first call to nonReentrant, _status will be _NOT_ENTERED
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
}
function _nonReentrantAfter() private {
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
/**
* @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
* `nonReentrant` function in the call stack.
*/
function _reentrancyGuardEntered() internal view returns (bool) {
return _status == _ENTERED;
}
}
// lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)
/**
* @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);
}
// lib/openzeppelin-contracts/contracts/token/ERC20/extensions/IERC20Permit.sol
// OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/IERC20Permit.sol)
/**
* @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);
}
// lib/openzeppelin-contracts/contracts/utils/Address.sol
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)
/**
* @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);
}
}
}
// lib/openzeppelin-contracts/contracts/utils/Context.sol
// OpenZeppelin Contracts (last updated v4.9.4) (utils/Context.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 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;
}
}
// lib/openzeppelin-contracts/contracts/utils/math/Math.sol
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
enum Rounding {
Down, // Toward negative infinity
Up, // Toward infinity
Zero // Toward zero
}
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow.
return (a & b) + (a ^ b) / 2;
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds up instead
* of rounding down.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b - 1) / b can overflow on addition, so we distribute.
return a == 0 ? 0 : (a - 1) / b + 1;
}
/**
* @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
* @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
* with further edits by Uniswap Labs also under MIT license.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
unchecked {
// 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
// use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
// variables such that product = prod1 * 2^256 + prod0.
uint256 prod0; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(x, y, not(0))
prod0 := mul(x, y)
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division.
if (prod1 == 0) {
// Solidity will revert if denominator == 0, unlike the div opcode on its own.
// The surrounding unchecked block does not change this fact.
// See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
return prod0 / denominator;
}
// Make sure the result is less than 2^256. Also prevents denominator == 0.
require(denominator > prod1, "Math: mulDiv overflow");
///////////////////////////////////////////////
// 512 by 256 division.
///////////////////////////////////////////////
// Make division exact by subtracting the remainder from [prod1 prod0].
uint256 remainder;
assembly {
// Compute remainder using mulmod.
remainder := mulmod(x, y, denominator)
// Subtract 256 bit number from 512 bit number.
prod1 := sub(prod1, gt(remainder, prod0))
prod0 := sub(prod0, remainder)
}
// Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
// See https://cs.stackexchange.com/q/138556/92363.
// Does not overflow because the denominator cannot be zero at this stage in the function.
uint256 twos = denominator & (~denominator + 1);
assembly {
// Divide denominator by twos.
denominator := div(denominator, twos)
// Divide [prod1 prod0] by twos.
prod0 := div(prod0, twos)
// Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
twos := add(div(sub(0, twos), twos), 1)
}
// Shift in bits from prod1 into prod0.
prod0 |= prod1 * twos;
// Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
// that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
// four bits. That is, denominator * inv = 1 mod 2^4.
uint256 inverse = (3 * denominator) ^ 2;
// Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
// in modular arithmetic, doubling the correct bits in each step.
inverse *= 2 - denominator * inverse; // inverse mod 2^8
inverse *= 2 - denominator * inverse; // inverse mod 2^16
inverse *= 2 - denominator * inverse; // inverse mod 2^32
inverse *= 2 - denominator * inverse; // inverse mod 2^64
inverse *= 2 - denominator * inverse; // inverse mod 2^128
inverse *= 2 - denominator * inverse; // inverse mod 2^256
// Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
// This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
// less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
// is no longer required.
result = prod0 * inverse;
return result;
}
}
/**
* @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
uint256 result = mulDiv(x, y, denominator);
if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
result += 1;
}
return result;
}
/**
* @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
*
* Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
*/
function sqrt(uint256 a) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
// For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
//
// We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
// `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
//
// This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
// ? `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
// ? `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
//
// Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
uint256 result = 1 << (log2(a) >> 1);
// At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
// since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
// every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
// into the expected uint128 result.
unchecked {
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
return min(result, a / result);
}
}
/**
* @notice Calculates sqrt(a), following the selected rounding direction.
*/
function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = sqrt(a);
return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
}
}
/**
* @dev Return the log in base 2, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 128;
}
if (value >> 64 > 0) {
value >>= 64;
result += 64;
}
if (value >> 32 > 0) {
value >>= 32;
result += 32;
}
if (value >> 16 > 0) {
value >>= 16;
result += 16;
}
if (value >> 8 > 0) {
value >>= 8;
result += 8;
}
if (value >> 4 > 0) {
value >>= 4;
result += 4;
}
if (value >> 2 > 0) {
value >>= 2;
result += 2;
}
if (value >> 1 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 2, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log2(value);
return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 10, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >= 10 ** 64) {
value /= 10 ** 64;
result += 64;
}
if (value >= 10 ** 32) {
value /= 10 ** 32;
result += 32;
}
if (value >= 10 ** 16) {
value /= 10 ** 16;
result += 16;
}
if (value >= 10 ** 8) {
value /= 10 ** 8;
result += 8;
}
if (value >= 10 ** 4) {
value /= 10 ** 4;
result += 4;
}
if (value >= 10 ** 2) {
value /= 10 ** 2;
result += 2;
}
if (value >= 10 ** 1) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 10, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log10(value);
return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 256, rounded down, of a positive value.
* Returns 0 if given 0.
*
* Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
*/
function log256(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 16;
}
if (value >> 64 > 0) {
value >>= 64;
result += 8;
}
if (value >> 32 > 0) {
value >>= 32;
result += 4;
}
if (value >> 16 > 0) {
value >>= 16;
result += 2;
}
if (value >> 8 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 256, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log256(value);
return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
}
}
}
// lib/tokenized-strategy/src/interfaces/IBaseStrategy.sol
interface IBaseStrategy {
function tokenizedStrategyAddress() external view returns (address);
/*//////////////////////////////////////////////////////////////
IMMUTABLE FUNCTIONS
//////////////////////////////////////////////////////////////*/
function availableDepositLimit(
address _owner
) external view returns (uint256);
function availableWithdrawLimit(
address _owner
) external view returns (uint256);
function deployFunds(uint256 _assets) external;
function freeFunds(uint256 _amount) external;
function harvestAndReport() external returns (uint256);
function tendThis(uint256 _totalIdle) external;
function shutdownWithdraw(uint256 _amount) external;
function tendTrigger() external view returns (bool, bytes memory);
}
// lib/tokenized-strategy-periphery/src/Bases/Hooks/Hooks.sol
contract DepositHooks {
function _preDepositHook(
uint256 assets,
uint256 shares,
address receiver
) internal virtual {}
function _postDepositHook(
uint256 assets,
uint256 shares,
address receiver
) internal virtual {}
}
contract WithdrawHooks {
function _preWithdrawHook(
uint256 assets,
uint256 shares,
address receiver,
address owner,
uint256 maxLoss
) internal virtual {}
function _postWithdrawHook(
uint256 assets,
uint256 shares,
address receiver,
address owner,
uint256 maxLoss
) internal virtual {}
}
contract TransferHooks {
function _preTransferHook(
address from,
address to,
uint256 amount
) internal virtual {}
function _postTransferHook(
address from,
address to,
uint256 amount,
bool success
) internal virtual {}
}
contract ReportHooks {
function _preReportHook() internal virtual {}
function _postReportHook(uint256 profit, uint256 loss) internal virtual {}
}
contract Hooks is DepositHooks, WithdrawHooks, TransferHooks, ReportHooks {}
// lib/tokenized-strategy-periphery/src/interfaces/ITaker.sol
interface ITaker {
function auctionTakeCallback(
address _from,
address _sender,
uint256 _amountTaken,
uint256 _amountNeeded,
bytes calldata _data
) external;
}
// lib/tokenized-strategy-periphery/src/libraries/Maths.sol
// Math library from https://github.com/ajna-finance/ajna-core/blob/master/src/libraries/internal/Maths.sol
/**
@title Maths library
@notice Internal library containing common maths.
*/
library Maths {
uint256 internal constant WAD = 1e18;
uint256 internal constant RAY = 1e27;
function wmul(uint256 x, uint256 y) internal pure returns (uint256) {
return (x * y + WAD / 2) / WAD;
}
function floorWmul(uint256 x, uint256 y) internal pure returns (uint256) {
return (x * y) / WAD;
}
function ceilWmul(uint256 x, uint256 y) internal pure returns (uint256) {
return (x * y + WAD - 1) / WAD;
}
function wdiv(uint256 x, uint256 y) internal pure returns (uint256) {
return (x * WAD + y / 2) / y;
}
function floorWdiv(uint256 x, uint256 y) internal pure returns (uint256) {
return (x * WAD) / y;
}
function ceilWdiv(uint256 x, uint256 y) internal pure returns (uint256) {
return (x * WAD + y - 1) / y;
}
function ceilDiv(uint256 x, uint256 y) internal pure returns (uint256) {
return (x + y - 1) / y;
}
function max(uint256 x, uint256 y) internal pure returns (uint256) {
return x >= y ? x : y;
}
function min(uint256 x, uint256 y) internal pure returns (uint256) {
return x <= y ? x : y;
}
function wad(uint256 x) internal pure returns (uint256) {
return x * WAD;
}
function rmul(uint256 x, uint256 y) internal pure returns (uint256) {
return (x * y + RAY / 2) / RAY;
}
function rpow(uint256 x, uint256 n) internal pure returns (uint256 z) {
z = n % 2 != 0 ? x : RAY;
for (n /= 2; n != 0; n /= 2) {
x = rmul(x, x);
if (n % 2 != 0) {
z = rmul(z, x);
}
}
}
/*************************/
/*** Integer Functions ***/
/*************************/
function maxInt(int256 x, int256 y) internal pure returns (int256) {
return x >= y ? x : y;
}
function minInt(int256 x, int256 y) internal pure returns (int256) {
return x <= y ? x : y;
}
}
// lib/tokenized-strategy-periphery/src/utils/Clonable.sol
contract Clonable {
/// @notice Set to the address to auto clone from.
address public original;
/**
* @notice Clone the contracts default `original` contract.
* @return Address of the new Minimal Proxy clone.
*/
function _clone() internal virtual returns (address) {
return _clone(original);
}
/**
* @notice Clone any `_original` contract.
* @return _newContract Address of the new Minimal Proxy clone.
*/
function _clone(
address _original
) internal virtual returns (address _newContract) {
// Copied from https://github.com/optionality/clone-factory/blob/master/contracts/CloneFactory.sol
bytes20 addressBytes = bytes20(_original);
assembly {
// EIP-1167 bytecode
let clone_code := mload(0x40)
mstore(
clone_code,
0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000
)
mstore(add(clone_code, 0x14), addressBytes)
mstore(
add(clone_code, 0x28),
0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000
)
_newContract := create(0, clone_code, 0x37)
}
}
}
// lib/tokenized-strategy-periphery/src/utils/Governance.sol
contract Governance {
/// @notice Emitted when the governance address is updated.
event GovernanceTransferred(
address indexed previousGovernance,
address indexed newGovernance
);
modifier onlyGovernance() {
_checkGovernance();
_;
}
/// @notice Checks if the msg sender is the governance.
function _checkGovernance() internal view virtual {
require(governance == msg.sender, "!governance");
}
/// @notice Address that can set the default base fee and provider
address public governance;
constructor(address _governance) {
governance = _governance;
emit GovernanceTransferred(address(0), _governance);
}
/**
* @notice Sets a new address as the governance of the contract.
* @dev Throws if the caller is not current governance.
* @param _newGovernance The new governance address.
*/
function transferGovernance(
address _newGovernance
) external virtual onlyGovernance {
require(_newGovernance != address(0), "ZERO ADDRESS");
address oldGovernance = governance;
governance = _newGovernance;
emit GovernanceTransferred(oldGovernance, _newGovernance);
}
}
// lib/openzeppelin-contracts/contracts/token/ERC20/extensions/IERC20Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// lib/tokenized-strategy-periphery/src/utils/Governance2Step.sol
contract Governance2Step is Governance {
/// @notice Emitted when the pending governance address is set.
event UpdatePendingGovernance(address indexed newPendingGovernance);
/// @notice Address that is set to take over governance.
address public pendingGovernance;
constructor(address _governance) Governance(_governance) {}
/**
* @notice Sets a new address as the `pendingGovernance` of the contract.
* @dev Throws if the caller is not current governance.
* @param _newGovernance The new governance address.
*/
function transferGovernance(
address _newGovernance
) external virtual override onlyGovernance {
require(_newGovernance != address(0), "ZERO ADDRESS");
pendingGovernance = _newGovernance;
emit UpdatePendingGovernance(_newGovernance);
}
/**
* @notice Allows the `pendingGovernance` to accept the role.
*/
function acceptGovernance() external virtual {
require(msg.sender == pendingGovernance, "!pending governance");
emit GovernanceTransferred(governance, msg.sender);
governance = msg.sender;
pendingGovernance = address(0);
}
}
// lib/openzeppelin-contracts/contracts/interfaces/IERC4626.sol
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC4626.sol)
/**
* @dev Interface of the ERC4626 "Tokenized Vault Standard", as defined in
* https://eips.ethereum.org/EIPS/eip-4626[ERC-4626].
*
* _Available since v4.7._
*/
interface IERC4626 is IERC20, IERC20Metadata {
event Deposit(address indexed sender, address indexed owner, uint256 assets, uint256 shares);
event Withdraw(
address indexed sender,
address indexed receiver,
address indexed owner,
uint256 assets,
uint256 shares
);
/**
* @dev Returns the address of the underlying token used for the Vault for accounting, depositing, and withdrawing.
*
* - MUST be an ERC-20 token contract.
* - MUST NOT revert.
*/
function asset() external view returns (address assetTokenAddress);
/**
* @dev Returns the total amount of the underlying asset that is “managed” by Vault.
*
* - SHOULD include any compounding that occurs from yield.
* - MUST be inclusive of any fees that are charged against assets in the Vault.
* - MUST NOT revert.
*/
function totalAssets() external view returns (uint256 totalManagedAssets);
/**
* @dev Returns the amount of shares that the Vault would exchange for the amount of assets provided, in an ideal
* scenario where all the conditions are met.
*
* - MUST NOT be inclusive of any fees that are charged against assets in the Vault.
* - MUST NOT show any variations depending on the caller.
* - MUST NOT reflect slippage or other on-chain conditions, when performing the actual exchange.
* - MUST NOT revert.
*
* NOTE: This calculation MAY NOT reflect the “per-user” price-per-share, and instead should reflect the
* “average-user’s” price-per-share, meaning what the average user should expect to see when exchanging to and
* from.
*/
function convertToShares(uint256 assets) external view returns (uint256 shares);
/**
* @dev Returns the amount of assets that the Vault would exchange for the amount of shares provided, in an ideal
* scenario where all the conditions are met.
*
* - MUST NOT be inclusive of any fees that are charged against assets in the Vault.
* - MUST NOT show any variations depending on the caller.
* - MUST NOT reflect slippage or other on-chain conditions, when performing the actual exchange.
* - MUST NOT revert.
*
* NOTE: This calculation MAY NOT reflect the “per-user” price-per-share, and instead should reflect the
* “average-user’s” price-per-share, meaning what the average user should expect to see when exchanging to and
* from.
*/
function convertToAssets(uint256 shares) external view returns (uint256 assets);
/**
* @dev Returns the maximum amount of the underlying asset that can be deposited into the Vault for the receiver,
* through a deposit call.
*
* - MUST return a limited value if receiver is subject to some deposit limit.
* - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of assets that may be deposited.
* - MUST NOT revert.
*/
function maxDeposit(address receiver) external view returns (uint256 maxAssets);
/**
* @dev Allows an on-chain or off-chain user to simulate the effects of their deposit at the current block, given
* current on-chain conditions.
*
* - MUST return as close to and no more than the exact amount of Vault shares that would be minted in a deposit
* call in the same transaction. I.e. deposit should return the same or more shares as previewDeposit if called
* in the same transaction.
* - MUST NOT account for deposit limits like those returned from maxDeposit and should always act as though the
* deposit would be accepted, regardless if the user has enough tokens approved, etc.
* - MUST be inclusive of deposit fees. Integrators should be aware of the existence of deposit fees.
* - MUST NOT revert.
*
* NOTE: any unfavorable discrepancy between convertToShares and previewDeposit SHOULD be considered slippage in
* share price or some other type of condition, meaning the depositor will lose assets by depositing.
*/
function previewDeposit(uint256 assets) external view returns (uint256 shares);
/**
* @dev Mints shares Vault shares to receiver by depositing exactly amount of underlying tokens.
*
* - MUST emit the Deposit event.
* - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
* deposit execution, and are accounted for during deposit.
* - MUST revert if all of assets cannot be deposited (due to deposit limit being reached, slippage, the user not
* approving enough underlying tokens to the Vault contract, etc).
*
* NOTE: most implementations will require pre-approval of the Vault with the Vault’s underlying asset token.
*/
function deposit(uint256 assets, address receiver) external returns (uint256 shares);
/**
* @dev Returns the maximum amount of the Vault shares that can be minted for the receiver, through a mint call.
* - MUST return a limited value if receiver is subject to some mint limit.
* - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of shares that may be minted.
* - MUST NOT revert.
*/
function maxMint(address receiver) external view returns (uint256 maxShares);
/**
* @dev Allows an on-chain or off-chain user to simulate the effects of their mint at the current block, given
* current on-chain conditions.
*
* - MUST return as close to and no fewer than the exact amount of assets that would be deposited in a mint call
* in the same transaction. I.e. mint should return the same or fewer assets as previewMint if called in the
* same transaction.
* - MUST NOT account for mint limits like those returned from maxMint and should always act as though the mint
* would be accepted, regardless if the user has enough tokens approved, etc.
* - MUST be inclusive of deposit fees. Integrators should be aware of the existence of deposit fees.
* - MUST NOT revert.
*
* NOTE: any unfavorable discrepancy between convertToAssets and previewMint SHOULD be considered slippage in
* share price or some other type of condition, meaning the depositor will lose assets by minting.
*/
function previewMint(uint256 shares) external view returns (uint256 assets);
/**
* @dev Mints exactly shares Vault shares to receiver by depositing amount of underlying tokens.
*
* - MUST emit the Deposit event.
* - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the mint
* execution, and are accounted for during mint.
* - MUST revert if all of shares cannot be minted (due to deposit limit being reached, slippage, the user not
* approving enough underlying tokens to the Vault contract, etc).
*
* NOTE: most implementations will require pre-approval of the Vault with the Vault’s underlying asset token.
*/
function mint(uint256 shares, address receiver) external returns (uint256 assets);
/**
* @dev Returns the maximum amount of the underlying asset that can be withdrawn from the owner balance in the
* Vault, through a withdraw call.
*
* - MUST return a limited value if owner is subject to some withdrawal limit or timelock.
* - MUST NOT revert.
*/
function maxWithdraw(address owner) external view returns (uint256 maxAssets);
/**
* @dev Allows an on-chain or off-chain user to simulate the effects of their withdrawal at the current block,
* given current on-chain conditions.
*
* - MUST return as close to and no fewer than the exact amount of Vault shares that would be burned in a withdraw
* call in the same transaction. I.e. withdraw should return the same or fewer shares as previewWithdraw if
* called
* in the same transaction.
* - MUST NOT account for withdrawal limits like those returned from maxWithdraw and should always act as though
* the withdrawal would be accepted, regardless if the user has enough shares, etc.
* - MUST be inclusive of withdrawal fees. Integrators should be aware of the existence of withdrawal fees.
* - MUST NOT revert.
*
* NOTE: any unfavorable discrepancy between convertToShares and previewWithdraw SHOULD be considered slippage in
* share price or some other type of condition, meaning the depositor will lose assets by depositing.
*/
function previewWithdraw(uint256 assets) external view returns (uint256 shares);
/**
* @dev Burns shares from owner and sends exactly assets of underlying tokens to receiver.
*
* - MUST emit the Withdraw event.
* - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
* withdraw execution, and are accounted for during withdraw.
* - MUST revert if all of assets cannot be withdrawn (due to withdrawal limit being reached, slippage, the owner
* not having enough shares, etc).
*
* Note that some implementations will require pre-requesting to the Vault before a withdrawal may be performed.
* Those methods should be performed separately.
*/
function withdraw(uint256 assets, address receiver, address owner) external returns (uint256 shares);
/**
* @dev Returns the maximum amount of Vault shares that can be redeemed from the owner balance in the Vault,
* through a redeem call.
*
* - MUST return a limited value if owner is subject to some withdrawal limit or timelock.
* - MUST return balanceOf(owner) if owner is not subject to any withdrawal limit or timelock.
* - MUST NOT revert.
*/
function maxRedeem(address owner) external view returns (uint256 maxShares);
/**
* @dev Allows an on-chain or off-chain user to simulate the effects of their redeemption at the current block,
* given current on-chain conditions.
*
* - MUST return as close to and no more than the exact amount of assets that would be withdrawn in a redeem call
* in the same transaction. I.e. redeem should return the same or more assets as previewRedeem if called in the
* same transaction.
* - MUST NOT account for redemption limits like those returned from maxRedeem and should always act as though the
* redemption would be accepted, regardless if the user has enough shares, etc.
* - MUST be inclusive of withdrawal fees. Integrators should be aware of the existence of withdrawal fees.
* - MUST NOT revert.
*
* NOTE: any unfavorable discrepancy between convertToAssets and previewRedeem SHOULD be considered slippage in
* share price or some other type of condition, meaning the depositor will lose assets by redeeming.
*/
function previewRedeem(uint256 shares) external view returns (uint256 assets);
/**
* @dev Burns exactly shares from owner and sends assets of underlying tokens to receiver.
*
* - MUST emit the Withdraw event.
* - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
* redeem execution, and are accounted for during redeem.
* - MUST revert if all of shares cannot be redeemed (due to withdrawal limit being reached, slippage, the owner
* not having enough shares, etc).
*
* NOTE: some implementations will require pre-requesting to the Vault before a withdrawal may be performed.
* Those methods should be performed separately.
*/
function redeem(uint256 shares, address receiver, address owner) external returns (uint256 assets);
}
// lib/openzeppelin-contracts/contracts/token/ERC20/ERC20.sol
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/ERC20.sol)
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* The default value of {decimals} is 18. To change this, you should override
* this function so it returns a different value.
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the default value returned by this function, unless
* it's overridden.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address to, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_transfer(owner, to, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
* `transferFrom`. This is semantically equivalent to an infinite approval.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_approve(owner, spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* NOTE: Does not update the allowance if the current allowance
* is the maximum `uint256`.
*
* Requirements:
*
* - `from` and `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
* - the caller must have allowance for ``from``'s tokens of at least
* `amount`.
*/
function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, amount);
_transfer(from, to, amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
address owner = _msgSender();
_approve(owner, spender, allowance(owner, spender) + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
address owner = _msgSender();
uint256 currentAllowance = allowance(owner, spender);
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `from` to `to`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
*/
function _transfer(address from, address to, uint256 amount) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(from, to, amount);
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[from] = fromBalance - amount;
// Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
// decrementing then incrementing.
_balances[to] += amount;
}
emit Transfer(from, to, amount);
_afterTokenTransfer(from, to, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
unchecked {
// Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
_balances[account] += amount;
}
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
// Overflow not possible: amount <= accountBalance <= totalSupply.
_totalSupply -= amount;
}
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Updates `owner` s allowance for `spender` based on spent `amount`.
*
* Does not update the allowance amount in case of infinite allowance.
* Revert if not enough allowance is available.
*
* Might emit an {Approval} event.
*/
function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
unchecked {
_approve(owner, spender, currentAllowance - amount);
}
}
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}
}
// lib/openzeppelin-contracts/contracts/token/ERC20/utils/SafeERC20.sol
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.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));
}
}
// lib/tokenized-strategy-periphery/lib/yearn-vaults-v3/contracts/interfaces/IVaultFactory.sol
interface IVaultFactory {
event NewVault(address indexed vaultAddress, address indexed asset);
event UpdateProtocolFeeBps(
uint16 oldProtocolFeeBps,
uint16 newProtocolFeeBps
);
event UpdateProtocolFeeRecipient(
address oldProtocolFeeRecipient,
address newProtocolFeeRecipient
);
event UpdateCustomProtocolFee(address vault, uint16 newCustomProtocolFee);
event RemovedCustomProtocolFee(address vault);
event FactoryShutdown();
event UpdatePendingGovernance(address newPendingGovernance);
event GovernanceTransferred(
address previousGovernance,
address newGovernance
);
function shutdown() external view returns (bool);
function governance() external view returns (address);
function pendingGovernance() external view returns (address);
function name() external view returns (string memory);
function use_custom_protocol_fee(address) external view returns (bool);
function deploy_new_vault(
address asset,
string memory name,
string memory symbol,
address role_manager,
uint256 profit_max_unlock_time
) external returns (address);
function vault_original() external view returns (address);
function apiVersion() external view returns (string memory);
function protocol_fee_config()
external
view
returns (uint16 fee_bps, address fee_recipient);
function protocol_fee_config(
address vault
) external view returns (uint16 fee_bps, address fee_recipient);
function set_protocol_fee_bps(uint16 new_protocol_fee_bps) external;
function set_protocol_fee_recipient(
address new_protocol_fee_recipient
) external;
function set_custom_protocol_fee_bps(
address vault,
uint16 new_custom_protocol_fee
) external;
function remove_custom_protocol_fee(address vault) external;
function shutdown_factory() external;
function transferGovernance(address new_governance) external;
function acceptGovernance() external;
}
// lib/tokenized-strategy-periphery/src/libraries/GPv2Order.sol
/// @title Gnosis Protocol v2 Order Library
/// @author Gnosis Developers
library GPv2Order {
/// @dev The complete data for a Gnosis Protocol order. This struct contains
/// all order parameters that are signed for submitting to GP.
struct Data {
ERC20 sellToken;
ERC20 buyToken;
address receiver;
uint256 sellAmount;
uint256 buyAmount;
uint32 validTo;
bytes32 appData;
uint256 feeAmount;
bytes32 kind;
bool partiallyFillable;
bytes32 sellTokenBalance;
bytes32 buyTokenBalance;
}
/// @dev The order EIP-712 type hash for the [`GPv2Order.Data`] struct.
///
/// This value is pre-computed from the following expression:
/// ```
/// keccak256(
/// "Order(" +
/// "address sellToken," +
/// "address buyToken," +
/// "address receiver," +
/// "uint256 sellAmount," +
/// "uint256 buyAmount," +
/// "uint32 validTo," +
/// "bytes32 appData," +
/// "uint256 feeAmount," +
/// "string kind," +
/// "bool partiallyFillable" +
/// "string sellTokenBalance" +
/// "string buyTokenBalance" +
/// ")"
/// )
/// ```
bytes32 internal constant TYPE_HASH =
hex"d5a25ba2e97094ad7d83dc28a6572da797d6b3e7fc6663bd93efb789fc17e489";
/// @dev The marker value for a sell order for computing the order struct
/// hash. This allows the EIP-712 compatible wallets to display a
/// descriptive string for the order kind (instead of 0 or 1).
///
/// This value is pre-computed from the following expression:
/// ```
/// keccak256("sell")
/// ```
bytes32 internal constant KIND_SELL =
hex"f3b277728b3fee749481eb3e0b3b48980dbbab78658fc419025cb16eee346775";
/// @dev The OrderKind marker value for a buy order for computing the order
/// struct hash.
///
/// This value is pre-computed from the following expression:
/// ```
/// keccak256("buy")
/// ```
bytes32 internal constant KIND_BUY =
hex"6ed88e868af0a1983e3886d5f3e95a2fafbd6c3450bc229e27342283dc429ccc";
/// @dev The TokenBalance marker value for using direct ERC20 balances for
/// computing the order struct hash.
///
/// This value is pre-computed from the following expression:
/// ```
/// keccak256("erc20")
/// ```
bytes32 internal constant BALANCE_ERC20 =
hex"5a28e9363bb942b639270062aa6bb295f434bcdfc42c97267bf003f272060dc9";
/// @dev The TokenBalance marker value for using Balancer Vault external
/// balances (in order to re-use Vault ERC20 approvals) for computing the
/// order struct hash.
///
/// This value is pre-computed from the following expression:
/// ```
/// keccak256("external")
/// ```
bytes32 internal constant BALANCE_EXTERNAL =
hex"abee3b73373acd583a130924aad6dc38cfdc44ba0555ba94ce2ff63980ea0632";
/// @dev The TokenBalance marker value for using Balancer Vault internal
/// balances for computing the order struct hash.
///
/// This value is pre-computed from the following expression:
/// ```
/// keccak256("internal")
/// ```
bytes32 internal constant BALANCE_INTERNAL =
hex"4ac99ace14ee0a5ef932dc609df0943ab7ac16b7583634612f8dc35a4289a6ce";
/// @dev Marker address used to indicate that the receiver of the trade
/// proceeds should the owner of the order.
///
/// This is chosen to be `address(0)` for gas efficiency as it is expected
/// to be the most common case.
address internal constant RECEIVER_SAME_AS_OWNER = address(0);
/// @dev The byte length of an order unique identifier.
uint256 internal constant UID_LENGTH = 56;
/// @dev Returns the actual receiver for an order. This function checks
/// whether or not the [`receiver`] field uses the marker value to indicate
/// it is the same as the order owner.
///
/// @return receiver The actual receiver of trade proceeds.
function actualReceiver(
Data memory order,
address owner
) internal pure returns (address receiver) {
if (order.receiver == RECEIVER_SAME_AS_OWNER) {
receiver = owner;
} else {
receiver = order.receiver;
}
}
/// @dev Return the EIP-712 signing hash for the specified order.
///
/// @param order The order to compute the EIP-712 signing hash for.
/// @param domainSeparator The EIP-712 domain separator to use.
/// @return orderDigest The 32 byte EIP-712 struct hash.
function hash(
Data memory order,
bytes32 domainSeparator
) internal pure returns (bytes32 orderDigest) {
bytes32 structHash;
// NOTE: Compute the EIP-712 order struct hash in place. As suggested
// in the EIP proposal, noting that the order struct has 10 fields, and
// including the type hash `(12 + 1) * 32 = 416` bytes to hash.
// <https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md#rationale-for-encodedata>
// solhint-disable-next-line no-inline-assembly
assembly {
let dataStart := sub(order, 32)
let temp := mload(dataStart)
mstore(dataStart, TYPE_HASH)
structHash := keccak256(dataStart, 416)
mstore(dataStart, temp)
}
// NOTE: Now that we have the struct hash, compute the EIP-712 signing
// hash using scratch memory past the free memory pointer. The signing
// hash is computed from `"\x19\x01" || domainSeparator || structHash`.
// <https://docs.soliditylang.org/en/v0.7.6/internals/layout_in_memory.html#layout-in-memory>
// <https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md#specification>
// solhint-disable-next-line no-inline-assembly
assembly {
let freeMemoryPointer := mload(0x40)
mstore(freeMemoryPointer, "\x19\x01")
mstore(add(freeMemoryPointer, 2), domainSeparator)
mstore(add(freeMemoryPointer, 34), structHash)
orderDigest := keccak256(freeMemoryPointer, 66)
}
}
/// @dev Packs order UID parameters into the specified memory location. The
/// result is equivalent to `abi.encodePacked(...)` with the difference that
/// it allows re-using the memory for packing the order UID.
///
/// This function reverts if the order UID buffer is not the correct size.
///
/// @param orderUid The buffer pack the order UID parameters into.
/// @param orderDigest The EIP-712 struct digest derived from the order
/// parameters.
/// @param owner The address of the user who owns this order.
/// @param validTo The epoch time at which the order will stop being valid.
function packOrderUidParams(
bytes memory orderUid,
bytes32 orderDigest,
address owner,
uint32 validTo
) internal pure {
require(orderUid.length == UID_LENGTH, "GPv2: uid buffer overflow");
// NOTE: Write the order UID to the allocated memory buffer. The order
// parameters are written to memory in **reverse order** as memory
// operations write 32-bytes at a time and we want to use a packed
// encoding. This means, for example, that after writing the value of
// `owner` to bytes `20:52`, writing the `orderDigest` to bytes `0:32`
// will **overwrite** bytes `20:32`. This is desirable as addresses are
// only 20 bytes and `20:32` should be `0`s:
//
// | 1111111111222222222233333333334444444444555555
// byte | 01234567890123456789012345678901234567890123456789012345
// -------+---------------------------------------------------------
// field | [.........orderDigest..........][......owner.......][vT]
// -------+---------------------------------------------------------
// mstore | [000000000000000000000000000.vT]
// | [00000000000.......owner.......]
// | [.........orderDigest..........]
//
// Additionally, since Solidity `bytes memory` are length prefixed,
// 32 needs to be added to all the offsets.
//
// solhint-disable-next-line no-inline-assembly
assembly {
mstore(add(orderUid, 56), validTo)
mstore(add(orderUid, 52), owner)
mstore(add(orderUid, 32), orderDigest)
}
}
/// @dev Extracts specific order information from the standardized unique
/// order id of the protocol.
///
/// @param orderUid The unique identifier used to represent an order in
/// the protocol. This uid is the packed concatenation of the order digest,
/// the validTo order parameter and the address of the user who created the
/// order. It is used by the user to interface with the contract directly,
/// and not by calls that are triggered by the solvers.
/// @return orderDigest The EIP-712 signing digest derived from the order
/// parameters.
/// @return owner The address of the user who owns this order.
/// @return validTo The epoch time at which the order will stop being valid.
function extractOrderUidParams(
bytes calldata orderUid
)
internal
pure
returns (bytes32 orderDigest, address owner, uint32 validTo)
{
require(orderUid.length == UID_LENGTH, "GPv2: invalid uid");
// Use assembly to efficiently decode packed calldata.
// solhint-disable-next-line no-inline-assembly
assembly {
orderDigest := calldataload(orderUid.offset)
owner := shr(96, calldataload(add(orderUid.offset, 32)))
validTo := shr(224, calldataload(add(orderUid.offset, 52)))
}
}
}
// lib/tokenized-strategy/src/interfaces/ITokenizedStrategy.sol
// Interface that implements the 4626 standard and the implementation functions
interface ITokenizedStrategy is IERC4626, IERC20Permit {
/*//////////////////////////////////////////////////////////////
EVENTS
//////////////////////////////////////////////////////////////*/
event StrategyShutdown();
event NewTokenizedStrategy(
address indexed strategy,
address indexed asset,
string apiVersion
);
event Reported(
uint256 profit,
uint256 loss,
uint256 protocolFees,
uint256 performanceFees
);
event UpdatePerformanceFeeRecipient(
address indexed newPerformanceFeeRecipient
);
event UpdateKeeper(address indexed newKeeper);
event UpdatePerformanceFee(uint16 newPerformanceFee);
event UpdateManagement(address indexed newManagement);
event UpdateEmergencyAdmin(address indexed newEmergencyAdmin);
event UpdateProfitMaxUnlockTime(uint256 newProfitMaxUnlockTime);
event UpdatePendingManagement(address indexed newPendingManagement);
/*//////////////////////////////////////////////////////////////
INITIALIZATION
//////////////////////////////////////////////////////////////*/
function initialize(
address _asset,
string memory _name,
address _management,
address _performanceFeeRecipient,
address _keeper
) external;
/*//////////////////////////////////////////////////////////////
NON-STANDARD 4626 OPTIONS
//////////////////////////////////////////////////////////////*/
function withdraw(
uint256 assets,
address receiver,
address owner,
uint256 maxLoss
) external returns (uint256);
function redeem(
uint256 shares,
address receiver,
address owner,
uint256 maxLoss
) external returns (uint256);
function maxWithdraw(
address owner,
uint256 /*maxLoss*/
) external view returns (uint256);
function maxRedeem(
address owner,
uint256 /*maxLoss*/
) external view returns (uint256);
/*//////////////////////////////////////////////////////////////
MODIFIER HELPERS
//////////////////////////////////////////////////////////////*/
function requireManagement(address _sender) external view;
function requireKeeperOrManagement(address _sender) external view;
function requireEmergencyAuthorized(address _sender) external view;
/*//////////////////////////////////////////////////////////////
KEEPERS FUNCTIONS
//////////////////////////////////////////////////////////////*/
function tend() external;
function report() external returns (uint256 _profit, uint256 _loss);
/*//////////////////////////////////////////////////////////////
CONSTANTS
//////////////////////////////////////////////////////////////*/
function MAX_FEE() external view returns (uint16);
function FACTORY() external view returns (address);
/*//////////////////////////////////////////////////////////////
GETTERS
//////////////////////////////////////////////////////////////*/
function apiVersion() external view returns (string memory);
function pricePerShare() external view returns (uint256);
function management() external view returns (address);
function pendingManagement() external view returns (address);
function keeper() external view returns (address);
function emergencyAdmin() external view returns (address);
function performanceFee() external view returns (uint16);
function performanceFeeRecipient() external view returns (address);
function fullProfitUnlockDate() external view returns (uint256);
function profitUnlockingRate() external view returns (uint256);
function profitMaxUnlockTime() external view returns (uint256);
function lastReport() external view returns (uint256);
function isShutdown() external view returns (bool);
function unlockedShares() external view returns (uint256);
/*//////////////////////////////////////////////////////////////
SETTERS
//////////////////////////////////////////////////////////////*/
function setPendingManagement(address) external;
function acceptManagement() external;
function setKeeper(address _keeper) external;
function setEmergencyAdmin(address _emergencyAdmin) external;
function setPerformanceFee(uint16 _performanceFee) external;
function setPerformanceFeeRecipient(
address _performanceFeeRecipient
) external;
function setProfitMaxUnlockTime(uint256 _profitMaxUnlockTime) external;
function setName(string calldata _newName) external;
function shutdownStrategy() external;
function emergencyWithdraw(uint256 _amount) external;
}
// lib/tokenized-strategy/src/BaseStrategy.sol
// TokenizedStrategy interface used for internal view delegateCalls.
/**
* @title YearnV3 Base Strategy
* @author yearn.finance
* @notice
* BaseStrategy implements all of the required functionality to
* seamlessly integrate with the `TokenizedStrategy` implementation contract
* allowing anyone to easily build a fully permissionless ERC-4626 compliant
* Vault by inheriting this contract and overriding three simple functions.
* It utilizes an immutable proxy pattern that allows the BaseStrategy
* to remain simple and small. All standard logic is held within the
* `TokenizedStrategy` and is reused over any n strategies all using the
* `fallback` function to delegatecall the implementation so that strategists
* can only be concerned with writing their strategy specific code.
*
* This contract should be inherited and the three main abstract methods
* `_deployFunds`, `_freeFunds` and `_harvestAndReport` implemented to adapt
* the Strategy to the particular needs it has to generate yield. There are
* other optional methods that can be implemented to further customize
* the strategy if desired.
*
* All default storage for the strategy is controlled and updated by the
* `TokenizedStrategy`. The implementation holds a storage struct that
* contains all needed global variables in a manual storage slot. This
* means strategists can feel free to implement their own custom storage
* variables as they need with no concern of collisions. All global variables
* can be viewed within the Strategy by a simple call using the
* `TokenizedStrategy` variable. IE: TokenizedStrategy.globalVariable();.
*/
abstract contract BaseStrategy {
/*//////////////////////////////////////////////////////////////
MODIFIERS
//////////////////////////////////////////////////////////////*/
/**
* @dev Used on TokenizedStrategy callback functions to make sure it is post
* a delegateCall from this address to the TokenizedStrategy.
*/
modifier onlySelf() {
_onlySelf();
_;
}
/**
* @dev Use to assure that the call is coming from the strategies management.
*/
modifier onlyManagement() {
TokenizedStrategy.requireManagement(msg.sender);
_;
}
/**
* @dev Use to assure that the call is coming from either the strategies
* management or the keeper.
*/
modifier onlyKeepers() {
TokenizedStrategy.requireKeeperOrManagement(msg.sender);
_;
}
/**
* @dev Use to assure that the call is coming from either the strategies
* management or the emergency admin.
*/
modifier onlyEmergencyAuthorized() {
TokenizedStrategy.requireEmergencyAuthorized(msg.sender);
_;
}
/**
* @dev Require that the msg.sender is this address.
*/
function _onlySelf() internal view {
require(msg.sender == address(this), "!self");
}
/*//////////////////////////////////////////////////////////////
CONSTANTS
//////////////////////////////////////////////////////////////*/
/**
* @dev This is the address of the TokenizedStrategy implementation
* contract that will be used by all strategies to handle the
* accounting, logic, storage etc.
*
* Any external calls to the that don't hit one of the functions
* defined in this base or the strategy will end up being forwarded
* through the fallback function, which will delegateCall this address.
*
* This address should be the same for every strategy, never be adjusted
* and always be checked before any integration with the Strategy.
*/
address public constant tokenizedStrategyAddress =
0xD377919FA87120584B21279a491F82D5265A139c;
/*//////////////////////////////////////////////////////////////
IMMUTABLES
//////////////////////////////////////////////////////////////*/
/**
* @dev Underlying asset the Strategy is earning yield on.
* Stored here for cheap retrievals within the strategy.
*/
ERC20 internal immutable asset;
/**
* @dev This variable is set to address(this) during initialization of each strategy.
*
* This can be used to retrieve storage data within the strategy
* contract as if it were a linked library.
*
* i.e. uint256 totalAssets = TokenizedStrategy.totalAssets()
*
* Using address(this) will mean any calls using this variable will lead
* to a call to itself. Which will hit the fallback function and
* delegateCall that to the actual TokenizedStrategy.
*/
ITokenizedStrategy internal immutable TokenizedStrategy;
/**
* @notice Used to initialize the strategy on deployment.
*
* This will set the `TokenizedStrategy` variable for easy
* internal view calls to the implementation. As well as
* initializing the default storage variables based on the
* parameters and using the deployer for the permissioned roles.
*
* @param _asset Address of the underlying asset.
* @param _name Name the strategy will use.
*/
constructor(address _asset, string memory _name) {
asset = ERC20(_asset);
// Set instance of the implementation for internal use.
TokenizedStrategy = ITokenizedStrategy(address(this));
// Initialize the strategy's storage variables.
_delegateCall(
abi.encodeCall(
ITokenizedStrategy.initialize,
(_asset, _name, msg.sender, msg.sender, msg.sender)
)
);
// Store the tokenizedStrategyAddress at the standard implementation
// address storage slot so etherscan picks up the interface. This gets
// stored on initialization and never updated.
assembly {
sstore(
// keccak256('eip1967.proxy.implementation' - 1)
0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc,
tokenizedStrategyAddress
)
}
}
/*//////////////////////////////////////////////////////////////
NEEDED TO BE OVERRIDDEN BY STRATEGIST
//////////////////////////////////////////////////////////////*/
/**
* @dev Can deploy up to '_amount' of 'asset' in the yield source.
*
* This function is called at the end of a {deposit} or {mint}
* call. Meaning that unless a whitelist is implemented it will
* be entirely permissionless and thus can be sandwiched or otherwise
* manipulated.
*
* @param _amount The amount of 'asset' that the strategy can attempt
* to deposit in the yield source.
*/
function _deployFunds(uint256 _amount) internal virtual;
/**
* @dev Should attempt to free the '_amount' of 'asset'.
*
* NOTE: The amount of 'asset' that is already loose has already
* been accounted for.
*
* This function is called during {withdraw} and {redeem} calls.
* Meaning that unless a whitelist is implemented it will be
* entirely permissionless and thus can be sandwiched or otherwise
* manipulated.
*
* Should not rely on asset.balanceOf(address(this)) calls other than
* for diff accounting purposes.
*
* Any difference between `_amount` and what is actually freed will be
* counted as a loss and passed on to the withdrawer. This means
* care should be taken in times of illiquidity. It may be better to revert
* if withdraws are simply illiquid so not to realize incorrect losses.
*
* @param _amount, The amount of 'asset' to be freed.
*/
function _freeFunds(uint256 _amount) internal virtual;
/**
* @dev Internal function to harvest all rewards, redeploy any idle
* funds and return an accurate accounting of all funds currently
* held by the Strategy.
*
* This should do any needed harvesting, rewards selling, accrual,
* redepositing etc. to get the most accurate view of current assets.
*
* NOTE: All applicable assets including loose assets should be
* accounted for in this function.
*
* Care should be taken when relying on oracles or swap values rather
* than actual amounts as all Strategy profit/loss accounting will
* be done based on this returned value.
*
* This can still be called post a shutdown, a strategist can check
* `TokenizedStrategy.isShutdown()` to decide if funds should be
* redeployed or simply realize any profits/losses.
*
* @return _totalAssets A trusted and accurate account for the total
* amount of 'asset' the strategy currently holds including idle funds.
*/
function _harvestAndReport()
internal
virtual
returns (uint256 _totalAssets);
/*//////////////////////////////////////////////////////////////
OPTIONAL TO OVERRIDE BY STRATEGIST
//////////////////////////////////////////////////////////////*/
/**
* @dev Optional function for strategist to override that can
* be called in between reports.
*
* If '_tend' is used tendTrigger() will also need to be overridden.
*
* This call can only be called by a permissioned role so may be
* through protected relays.
*
* This can be used to harvest and compound rewards, deposit idle funds,
* perform needed position maintenance or anything else that doesn't need
* a full report for.
*
* EX: A strategy that can not deposit funds without getting
* sandwiched can use the tend when a certain threshold
* of idle to totalAssets has been reached.
*
* This will have no effect on PPS of the strategy till report() is called.
*
* @param _totalIdle The current amount of idle funds that are available to deploy.
*/
function _tend(uint256 _totalIdle) internal virtual {}
/**
* @dev Optional trigger to override if tend() will be used by the strategy.
* This must be implemented if the strategy hopes to invoke _tend().
*
* @return . Should return true if tend() should be called by keeper or false if not.
*/
function _tendTrigger() internal view virtual returns (bool) {
return false;
}
/**
* @notice Returns if tend() should be called by a keeper.
*
* @return . Should return true if tend() should be called by keeper or false if not.
* @return . Calldata for the tend call.
*/
function tendTrigger() external view virtual returns (bool, bytes memory) {
return (
// Return the status of the tend trigger.
_tendTrigger(),
// And the needed calldata either way.
abi.encodeWithSelector(ITokenizedStrategy.tend.selector)
);
}
/**
* @notice Gets the max amount of `asset` that an address can deposit.
* @dev Defaults to an unlimited amount for any address. But can
* be overridden by strategists.
*
* This function will be called before any deposit or mints to enforce
* any limits desired by the strategist. This can be used for either a
* traditional deposit limit or for implementing a whitelist etc.
*
* EX:
* if(isAllowed[_owner]) return super.availableDepositLimit(_owner);
*
* This does not need to take into account any conversion rates
* from shares to assets. But should know that any non max uint256
* amounts may be converted to shares. So it is recommended to keep
* custom amounts low enough as not to cause overflow when multiplied
* by `totalSupply`.
*
* @param . The address that is depositing into the strategy.
* @return . The available amount the `_owner` can deposit in terms of `asset`
*/
function availableDepositLimit(
address /*_owner*/
) public view virtual returns (uint256) {
return type(uint256).max;
}
/**
* @notice Gets the max amount of `asset` that can be withdrawn.
* @dev Defaults to an unlimited amount for any address. But can
* be overridden by strategists.
*
* This function will be called before any withdraw or redeem to enforce
* any limits desired by the strategist. This can be used for illiquid
* or sandwichable strategies. It should never be lower than `totalIdle`.
*
* EX:
* return TokenIzedStrategy.totalIdle();
*
* This does not need to take into account the `_owner`'s share balance
* or conversion rates from shares to assets.
*
* @param . The address that is withdrawing from the strategy.
* @return . The available amount that can be withdrawn in terms of `asset`
*/
function availableWithdrawLimit(
address /*_owner*/
) public view virtual returns (uint256) {
return type(uint256).max;
}
/**
* @dev Optional function for a strategist to override that will
* allow management to manually withdraw deployed funds from the
* yield source if a strategy is shutdown.
*
* This should attempt to free `_amount`, noting that `_amount` may
* be more than is currently deployed.
*
* NOTE: This will not realize any profits or losses. A separate
* {report} will be needed in order to record any profit/loss. If
* a report may need to be called after a shutdown it is important
* to check if the strategy is shutdown during {_harvestAndReport}
* so that it does not simply re-deploy all funds that had been freed.
*
* EX:
* if(freeAsset > 0 && !TokenizedStrategy.isShutdown()) {
* depositFunds...
* }
*
* @param _amount The amount of asset to attempt to free.
*/
function _emergencyWithdraw(uint256 _amount) internal virtual {}
/*//////////////////////////////////////////////////////////////
TokenizedStrategy HOOKS
//////////////////////////////////////////////////////////////*/
/**
* @notice Can deploy up to '_amount' of 'asset' in yield source.
* @dev Callback for the TokenizedStrategy to call during a {deposit}
* or {mint} to tell the strategy it can deploy funds.
*
* Since this can only be called after a {deposit} or {mint}
* delegateCall to the TokenizedStrategy msg.sender == address(this).
*
* Unless a whitelist is implemented this will be entirely permissionless
* and thus can be sandwiched or otherwise manipulated.
*
* @param _amount The amount of 'asset' that the strategy can
* attempt to deposit in the yield source.
*/
function deployFunds(uint256 _amount) external virtual onlySelf {
_deployFunds(_amount);
}
/**
* @notice Should attempt to free the '_amount' of 'asset'.
* @dev Callback for the TokenizedStrategy to call during a withdraw
* or redeem to free the needed funds to service the withdraw.
*
* This can only be called after a 'withdraw' or 'redeem' delegateCall
* to the TokenizedStrategy so msg.sender == address(this).
*
* @param _amount The amount of 'asset' that the strategy should attempt to free up.
*/
function freeFunds(uint256 _amount) external virtual onlySelf {
_freeFunds(_amount);
}
/**
* @notice Returns the accurate amount of all funds currently
* held by the Strategy.
* @dev Callback for the TokenizedStrategy to call during a report to
* get an accurate accounting of assets the strategy controls.
*
* This can only be called after a report() delegateCall to the
* TokenizedStrategy so msg.sender == address(this).
*
* @return . A trusted and accurate account for the total amount
* of 'asset' the strategy currently holds including idle funds.
*/
function harvestAndReport() external virtual onlySelf returns (uint256) {
return _harvestAndReport();
}
/**
* @notice Will call the internal '_tend' when a keeper tends the strategy.
* @dev Callback for the TokenizedStrategy to initiate a _tend call in the strategy.
*
* This can only be called after a tend() delegateCall to the TokenizedStrategy
* so msg.sender == address(this).
*
* We name the function `tendThis` so that `tend` calls are forwarded to
* the TokenizedStrategy.
* @param _totalIdle The amount of current idle funds that can be
* deployed during the tend
*/
function tendThis(uint256 _totalIdle) external virtual onlySelf {
_tend(_totalIdle);
}
/**
* @notice Will call the internal '_emergencyWithdraw' function.
* @dev Callback for the TokenizedStrategy during an emergency withdraw.
*
* This can only be called after a emergencyWithdraw() delegateCall to
* the TokenizedStrategy so msg.sender == address(this).
*
* We name the function `shutdownWithdraw` so that `emergencyWithdraw`
* calls are forwarded to the TokenizedStrategy.
*
* @param _amount The amount of asset to attempt to free.
*/
function shutdownWithdraw(uint256 _amount) external virtual onlySelf {
_emergencyWithdraw(_amount);
}
/**
* @dev Function used to delegate call the TokenizedStrategy with
* certain `_calldata` and return any return values.
*
* This is used to setup the initial storage of the strategy, and
* can be used by strategist to forward any other call to the
* TokenizedStrategy implementation.
*
* @param _calldata The abi encoded calldata to use in delegatecall.
* @return . The return value if the call was successful in bytes.
*/
function _delegateCall(
bytes memory _calldata
) internal returns (bytes memory) {
// Delegate call the tokenized strategy with provided calldata.
(bool success, bytes memory result) = tokenizedStrategyAddress
.delegatecall(_calldata);
// If the call reverted. Return the error.
if (!success) {
assembly {
let ptr := mload(0x40)
let size := returndatasize()
returndatacopy(ptr, 0, size)
revert(ptr, size)
}
}
// Return the result.
return result;
}
/**
* @dev Execute a function on the TokenizedStrategy and return any value.
*
* This fallback function will be executed when any of the standard functions
* defined in the TokenizedStrategy are called since they wont be defined in
* this contract.
*
* It will delegatecall the TokenizedStrategy implementation with the exact
* calldata and return any relevant values.
*
*/
fallback() external {
// load our target address
address _tokenizedStrategyAddress = tokenizedStrategyAddress;
// Execute external function using delegatecall and return any value.
assembly {
// Copy function selector and any arguments.
calldatacopy(0, 0, calldatasize())
// Execute function delegatecall.
let result := delegatecall(
gas(),
_tokenizedStrategyAddress,
0,
calldatasize(),
0,
0
)
// Get any return value
returndatacopy(0, 0, returndatasize())
// Return any return value or error back to the caller
switch result
case 0 {
revert(0, returndatasize())
}
default {
return(0, returndatasize())
}
}
}
}
// lib/tokenized-strategy/src/interfaces/IStrategy.sol
interface IStrategy is IBaseStrategy, ITokenizedStrategy {}
// lib/tokenized-strategy-periphery/src/Bases/HealthCheck/BaseHealthCheck.sol
/**
* @title Base Health Check
* @author Yearn.finance
* @notice This contract can be inherited by any Yearn
* V3 strategy wishing to implement a health check during
* the `report` function in order to prevent any unexpected
* behavior from being permanently recorded as well as the
* `checkHealth` modifier.
*
* A strategist simply needs to inherit this contract. Set
* the limit ratios to the desired amounts and then
* override `_harvestAndReport()` just as they otherwise
* would. If the profit or loss that would be recorded is
* outside the acceptable bounds the tx will revert.
*
* The healthcheck does not prevent a strategy from reporting
* losses, but rather can make sure manual intervention is
* needed before reporting an unexpected loss or profit.
*/
abstract contract BaseHealthCheck is BaseStrategy {
// Can be used to determine if a healthcheck should be called.
// Defaults to true;
bool public doHealthCheck = true;
uint256 internal constant MAX_BPS = 10_000;
// Default profit limit to 100%.
uint16 private _profitLimitRatio = uint16(MAX_BPS);
// Defaults loss limit to 0.
uint16 private _lossLimitRatio;
constructor(
address _asset,
string memory _name
) BaseStrategy(_asset, _name) {}
/**
* @notice Returns the current profit limit ratio.
* @dev Use a getter function to keep the variable private.
* @return . The current profit limit ratio.
*/
function profitLimitRatio() public view returns (uint256) {
return _profitLimitRatio;
}
/**
* @notice Returns the current loss limit ratio.
* @dev Use a getter function to keep the variable private.
* @return . The current loss limit ratio.
*/
function lossLimitRatio() public view returns (uint256) {
return _lossLimitRatio;
}
/**
* @notice Set the `profitLimitRatio`.
* @dev Denominated in basis points. I.E. 1_000 == 10%.
* @param _newProfitLimitRatio The mew profit limit ratio.
*/
function setProfitLimitRatio(
uint256 _newProfitLimitRatio
) external onlyManagement {
_setProfitLimitRatio(_newProfitLimitRatio);
}
/**
* @dev Internally set the profit limit ratio. Denominated
* in basis points. I.E. 1_000 == 10%.
* @param _newProfitLimitRatio The mew profit limit ratio.
*/
function _setProfitLimitRatio(uint256 _newProfitLimitRatio) internal {
require(_newProfitLimitRatio > 0, "!zero profit");
require(_newProfitLimitRatio <= type(uint16).max, "!too high");
_profitLimitRatio = uint16(_newProfitLimitRatio);
}
/**
* @notice Set the `lossLimitRatio`.
* @dev Denominated in basis points. I.E. 1_000 == 10%.
* @param _newLossLimitRatio The new loss limit ratio.
*/
function setLossLimitRatio(
uint256 _newLossLimitRatio
) external onlyManagement {
_setLossLimitRatio(_newLossLimitRatio);
}
/**
* @dev Internally set the loss limit ratio. Denominated
* in basis points. I.E. 1_000 == 10%.
* @param _newLossLimitRatio The new loss limit ratio.
*/
function _setLossLimitRatio(uint256 _newLossLimitRatio) internal {
require(_newLossLimitRatio < MAX_BPS, "!loss limit");
_lossLimitRatio = uint16(_newLossLimitRatio);
}
/**
* @notice Turns the healthcheck on and off.
* @dev If turned off the next report will auto turn it back on.
* @param _doHealthCheck Bool if healthCheck should be done.
*/
function setDoHealthCheck(bool _doHealthCheck) public onlyManagement {
doHealthCheck = _doHealthCheck;
}
/**
* @notice OVerrides the default {harvestAndReport} to include a healthcheck.
* @return _totalAssets New totalAssets post report.
*/
function harvestAndReport()
external
override
onlySelf
returns (uint256 _totalAssets)
{
// Let the strategy report.
_totalAssets = _harvestAndReport();
// Run the healthcheck on the amount returned.
_executeHealthCheck(_totalAssets);
}
/**
* @dev To be called during a report to make sure the profit
* or loss being recorded is within the acceptable bound.
*
* @param _newTotalAssets The amount that will be reported.
*/
function _executeHealthCheck(uint256 _newTotalAssets) internal virtual {
if (!doHealthCheck) {
doHealthCheck = true;
return;
}
// Get the current total assets from the implementation.
uint256 currentTotalAssets = TokenizedStrategy.totalAssets();
if (_newTotalAssets > currentTotalAssets) {
require(
((_newTotalAssets - currentTotalAssets) <=
(currentTotalAssets * uint256(_profitLimitRatio)) /
MAX_BPS),
"healthCheck"
);
} else if (currentTotalAssets > _newTotalAssets) {
require(
(currentTotalAssets - _newTotalAssets <=
((currentTotalAssets * uint256(_lossLimitRatio)) /
MAX_BPS)),
"healthCheck"
);
}
}
}
// lib/tokenized-strategy-periphery/src/Bases/Staker/ITokenizedStaker.sol
interface ITokenizedStaker is IStrategy {
struct Reward {
/// @notice The only address able to top up rewards for a token (aka notifyRewardAmount()).
address rewardsDistributor;
/// @notice The duration of our rewards distribution for staking, default is 7 days.
uint96 rewardsDuration;
/// @notice The end (timestamp) of our current or most recent reward period.
uint96 periodFinish;
/**
* @notice The last time r ewards were updated, triggered by updateReward() or notifyRewardAmount().
* @dev Will be the timestamp of the update or the end of the period, whichever is earlier.
*/
uint96 lastUpdateTime;
/// @notice The distribution rate of reward token per second.
uint128 rewardRate;
/**
* @notice The most recent stored amount for rewardPerToken().
* @dev Updated every time anyone calls the updateReward() modifier.
*/
uint128 rewardPerTokenStored;
/**
* @notice The last time a notifyRewardAmount was called.
* @dev Used for lastRewardRate, a rewardRate equivalent for instant reward releases.
*/
uint96 lastNotifyTime;
/// @notice The last rewardRate before a notifyRewardAmount was called
uint128 lastRewardRate;
}
/* ========== EVENTS ========== */
event RewardTokenAdded(
address indexed rewardToken,
address indexed rewardsDistributor,
uint256 rewardsDuration
);
event RewardAdded(address indexed rewardToken, uint256 reward);
event RewardPaid(
address indexed user,
address indexed rewardToken,
uint256 reward
);
event RewardsDistributorUpdated(
address indexed rewardToken,
address indexed rewardsDistributor
);
event RewardsDurationUpdated(
address indexed rewardToken,
uint256 newDuration
);
event ClaimForRecipientUpdated(
address indexed staker,
address indexed recipient
);
event NotifiedWithZeroSupply(address indexed rewardToken, uint256 reward);
event Recovered(address token, uint256 amount);
/* ========== STATE VARIABLES ========== */
function rewardTokens(uint256 index) external view returns (address);
function rewardToken(address) external view returns (address);
function periodFinish(address) external view returns (uint256);
function rewardRate(address) external view returns (uint256);
function rewardsDuration(address) external view returns (uint256);
function lastUpdateTime(address) external view returns (uint256);
function rewardPerTokenStored(address) external view returns (uint256);
function getRewardTokens() external view returns (address[] memory);
function userRewardPerTokenPaid(
address _account,
address _rewardToken
) external view returns (uint256);
function rewards(
address _account,
address _rewardToken
) external view returns (uint256);
function claimForRecipient(address) external view returns (address);
/* ========== FUNCTIONS ========== */
function lastTimeRewardApplicable(
address _rewardToken
) external view returns (uint256);
function rewardPerToken(
address _rewardToken
) external view returns (uint256);
function earned(
address _account,
address _rewardToken
) external view returns (uint256);
function earnedMulti(
address _account
) external view returns (uint256[] memory);
function getRewardForDuration(
address _rewardToken
) external view returns (uint256);
function notifyRewardAmount(
address _rewardToken,
uint256 _rewardAmount
) external;
function getReward() external;
function getRewardFor(address _staker) external;
function exit() external;
function setRewardsDistributor(
address _rewardToken,
address _rewardsDistributor
) external;
function setRewardsDuration(
address _rewardToken,
uint256 _rewardsDuration
) external;
function setClaimFor(address _staker, address _recipient) external;
function setClaimForSelf(address _recipient) external;
function rewardData(
address rewardToken
) external view returns (Reward memory);
function addReward(
address _rewardToken,
address _rewardsDistributor,
uint256 _rewardsDuration
) external;
function getOneReward(address _rewardToken) external;
function getOneRewardFor(address _rewardToken, address _staker) external;
function recoverERC20(address _tokenAddress, uint256 _tokenAmount) external;
}
// lib/tokenized-strategy-periphery/src/Bases/Hooks/BaseHooks.sol
/**
* @title Base Hooks
* @author Yearn.finance
* @notice This contract can be inherited by any Yearn
* strategy wishing to implement pre or post deposit, withdraw
* or transfer hooks in their strategy.
*/
abstract contract BaseHooks is BaseHealthCheck, Hooks {
constructor(
address _asset,
string memory _name
) BaseHealthCheck(_asset, _name) {}
// Deposit
function deposit(
uint256 assets,
address receiver
) external virtual returns (uint256 shares) {
_preDepositHook(assets, shares, receiver);
shares = abi.decode(
_delegateCall(
abi.encodeCall(TokenizedStrategy.deposit, (assets, receiver))
),
(uint256)
);
_postDepositHook(assets, shares, receiver);
}
// Mint
function mint(
uint256 shares,
address receiver
) external virtual returns (uint256 assets) {
_preDepositHook(assets, shares, receiver);
assets = abi.decode(
_delegateCall(
abi.encodeCall(TokenizedStrategy.mint, (shares, receiver))
),
(uint256)
);
_postDepositHook(assets, shares, receiver);
}
// Withdraw
function withdraw(
uint256 assets,
address receiver,
address owner
) external virtual returns (uint256 shares) {
return withdraw(assets, receiver, owner, 0);
}
function withdraw(
uint256 assets,
address receiver,
address owner,
uint256 maxLoss
) public virtual returns (uint256 shares) {
_preWithdrawHook(assets, shares, receiver, owner, maxLoss);
shares = abi.decode(
_delegateCall(
// Have to use encodeWithSignature due to overloading parameters.
abi.encodeWithSignature(
"withdraw(uint256,address,address,uint256)",
assets,
receiver,
owner,
maxLoss
)
),
(uint256)
);
_postWithdrawHook(assets, shares, receiver, owner, maxLoss);
}
// Redeem
function redeem(
uint256 shares,
address receiver,
address owner
) external virtual returns (uint256) {
// We default to not limiting a potential loss.
return redeem(shares, receiver, owner, MAX_BPS);
}
function redeem(
uint256 shares,
address receiver,
address owner,
uint256 maxLoss
) public returns (uint256 assets) {
_preWithdrawHook(assets, shares, receiver, owner, maxLoss);
assets = abi.decode(
_delegateCall(
// Have to use encodeWithSignature due to overloading parameters.
abi.encodeWithSignature(
"redeem(uint256,address,address,uint256)",
shares,
receiver,
owner,
maxLoss
)
),
(uint256)
);
_postWithdrawHook(assets, shares, receiver, owner, maxLoss);
}
// Transfer
function transferFrom(
address from,
address to,
uint256 amount
) public virtual returns (bool success) {
_preTransferHook(from, to, amount);
success = abi.decode(
_delegateCall(
abi.encodeCall(
TokenizedStrategy.transferFrom,
(from, to, amount)
)
),
(bool)
);
_postTransferHook(from, to, amount, success);
}
// Transfer from
function transfer(
address to,
uint256 amount
) external virtual returns (bool success) {
_preTransferHook(msg.sender, to, amount);
success = abi.decode(
_delegateCall(
abi.encodeCall(TokenizedStrategy.transfer, (to, amount))
),
(bool)
);
_postTransferHook(msg.sender, to, amount, success);
}
function report() external virtual returns (uint256 profit, uint256 loss) {
_preReportHook();
(profit, loss) = abi.decode(
_delegateCall(abi.encodeCall(TokenizedStrategy.report, ())),
(uint256, uint256)
);
_postReportHook(profit, loss);
}
}
// src/interfaces/IStrategyInterface.sol
interface IStrategyInterface is ITokenizedStaker {
// State variables
function vault() external view returns (address);
function want() external view returns (address);
function rewardHandler() external view returns (address);
function auction() external view returns (address);
// Core functions
function claimRewards() external;
function balanceOfVault() external view returns (uint256);
function valueOfVault() external view returns (uint256);
function vaultsMaxWithdraw() external view returns (uint256);
function setAuction(address _auction) external;
}
// lib/tokenized-strategy-periphery/src/Auctions/Auction.sol
interface ICowSettlement {
function domainSeparator() external view returns (bytes32);
}
/**
* @title Auction
* @author yearn.fi
* @notice General use dutch auction contract for token sales.
*/
contract Auction is Governance2Step, ReentrancyGuard {
using GPv2Order for GPv2Order.Data;
using SafeERC20 for ERC20;
/// @notice Emitted when a new auction is enabled
event AuctionEnabled(address indexed from, address indexed to);
/// @notice Emitted when an auction is disabled.
event AuctionDisabled(address indexed from, address indexed to);
/// @notice Emitted when auction has been kicked.
event AuctionKicked(address indexed from, uint256 available);
/// @notice Emitted when the starting price is updated.
event UpdatedStartingPrice(uint256 startingPrice);
/// @dev Store address and scaler in one slot.
struct TokenInfo {
address tokenAddress;
uint96 scaler;
}
/// @notice Store all the auction specific information.
struct AuctionInfo {
uint64 kicked;
uint64 scaler;
uint128 initialAvailable;
}
uint256 internal constant WAD = 1e18;
/// @notice Used for the price decay.
uint256 internal constant MINUTE_HALF_LIFE =
0.988514020352896135_356867505 * 1e27; // 0.5^(1/60)
address internal constant COW_SETTLEMENT =
0x9008D19f58AAbD9eD0D60971565AA8510560ab41;
address internal constant VAULT_RELAYER =
0xC92E8bdf79f0507f65a392b0ab4667716BFE0110;
bytes32 internal immutable COW_DOMAIN_SEPARATOR;
/// @notice Struct to hold the info for `want`.
TokenInfo internal wantInfo;
/// @notice The address that will receive the funds in the auction.
address public receiver;
/// @notice The amount to start the auction at.
uint256 public startingPrice;
/// @notice The time that each auction lasts.
uint256 public auctionLength;
/// @notice Mapping from `from` token to its struct.
mapping(address => AuctionInfo) public auctions;
/// @notice Array of all the enabled auction for this contract.
address[] public enabledAuctions;
constructor() Governance2Step(msg.sender) {
bytes32 domainSeparator;
if (COW_SETTLEMENT.code.length > 0) {
domainSeparator = ICowSettlement(COW_SETTLEMENT).domainSeparator();
} else {
domainSeparator = bytes32(0);
}
COW_DOMAIN_SEPARATOR = domainSeparator;
}
/**
* @notice Initializes the Auction contract with initial parameters.
* @param _want Address this auction is selling to.
* @param _receiver Address that will receive the funds from the auction.
* @param _governance Address of the contract governance.
* @param _auctionLength Duration of each auction in seconds.
* @param _startingPrice Starting price for each auction.
*/
function initialize(
address _want,
address _receiver,
address _governance,
uint256 _auctionLength,
uint256 _startingPrice
) public virtual {
require(auctionLength == 0, "initialized");
require(_want != address(0), "ZERO ADDRESS");
require(_auctionLength != 0, "length");
require(_startingPrice != 0, "starting price");
require(_receiver != address(0), "receiver");
// Cannot have more than 18 decimals.
uint256 decimals = ERC20(_want).decimals();
require(decimals <= 18, "unsupported decimals");
// Set variables
wantInfo = TokenInfo({
tokenAddress: _want,
scaler: uint96(WAD / 10 ** decimals)
});
receiver = _receiver;
governance = _governance;
auctionLength = _auctionLength;
startingPrice = _startingPrice;
emit UpdatedStartingPrice(_startingPrice);
}
/*//////////////////////////////////////////////////////////////
VIEW METHODS
//////////////////////////////////////////////////////////////*/
/**
* @notice Get the address of this auctions want token.
* @return . The want token.
*/
function want() public view virtual returns (address) {
return wantInfo.tokenAddress;
}
/**
* @notice Get the available amount for the auction.
* @param _from The address of the token to be auctioned.
* @return . The available amount for the auction.
*/
function available(address _from) public view virtual returns (uint256) {
if (!isActive(_from)) return 0;
return
Maths.min(
auctions[_from].initialAvailable,
ERC20(_from).balanceOf(address(this))
);
}
/**
* @notice Get the kicked timestamp for the auction.
* @param _from The address of the token to be auctioned.
* @return . The kicked timestamp for the auction.
*/
function kicked(address _from) external view virtual returns (uint256) {
return auctions[_from].kicked;
}
/**
* @notice Check if the auction is active.
* @param _from The address of the token to be auctioned.
* @return . Whether the auction is active.
*/
function isActive(address _from) public view virtual returns (bool) {
return auctions[_from].kicked + auctionLength >= block.timestamp;
}
/**
* @notice Get all the enabled auctions.
*/
function getAllEnabledAuctions()
external
view
virtual
returns (address[] memory)
{
return enabledAuctions;
}
/**
* @notice Get the pending amount available for the next auction.
* @dev Defaults to the auctions balance of the from token if no hook.
* @param _from The address of the token to be auctioned.
* @return uint256 The amount that can be kicked into the auction.
*/
function kickable(address _from) external view virtual returns (uint256) {
// If not enough time has passed then `kickable` is 0.
if (isActive(_from)) return 0;
// Use the full balance of this contract.
return ERC20(_from).balanceOf(address(this));
}
/**
* @notice Gets the amount of `want` needed to buy the available amount of `from`.
* @param _from The address of the token to be auctioned.
* @return . The amount of `want` needed to fulfill the take amount.
*/
function getAmountNeeded(
address _from
) external view virtual returns (uint256) {
return
_getAmountNeeded(
auctions[_from],
available(_from),
block.timestamp
);
}
/**
* @notice Gets the amount of `want` needed to buy a specific amount of `from`.
* @param _from The address of the token to be auctioned.
* @param _amountToTake The amount of `from` to take in the auction.
* @return . The amount of `want` needed to fulfill the take amount.
*/
function getAmountNeeded(
address _from,
uint256 _amountToTake
) external view virtual returns (uint256) {
return
_getAmountNeeded(auctions[_from], _amountToTake, block.timestamp);
}
/**
* @notice Gets the amount of `want` needed to buy a specific amount of `from` at a specific timestamp.
* @param _from The address of the token to be auctioned.
* @param _amountToTake The amount `from` to take in the auction.
* @param _timestamp The specific timestamp for calculating the amount needed.
* @return . The amount of `want` needed to fulfill the take amount.
*/
function getAmountNeeded(
address _from,
uint256 _amountToTake,
uint256 _timestamp
) external view virtual returns (uint256) {
return _getAmountNeeded(auctions[_from], _amountToTake, _timestamp);
}
/**
* @dev Return the amount of `want` needed to buy `_amountToTake`.
*/
function _getAmountNeeded(
AuctionInfo memory _auction,
uint256 _amountToTake,
uint256 _timestamp
) internal view virtual returns (uint256) {
return
// Scale _amountToTake to 1e18
(_amountToTake *
_auction.scaler *
// Price is always 1e18
_price(
_auction.kicked,
_auction.initialAvailable * _auction.scaler,
_timestamp
)) /
1e18 /
// Scale back down to want.
wantInfo.scaler;
}
/**
* @notice Gets the price of the auction at the current timestamp.
* @param _from The address of the token to be auctioned.
* @return . The price of the auction.
*/
function price(address _from) external view virtual returns (uint256) {
return price(_from, block.timestamp);
}
/**
* @notice Gets the price of the auction at a specific timestamp.
* @param _from The address of the token to be auctioned.
* @param _timestamp The specific timestamp for calculating the price.
* @return . The price of the auction.
*/
function price(
address _from,
uint256 _timestamp
) public view virtual returns (uint256) {
// Get unscaled price and scale it down.
return
_price(
auctions[_from].kicked,
auctions[_from].initialAvailable * auctions[_from].scaler,
_timestamp
) / wantInfo.scaler;
}
/**
* @dev Internal function to calculate the scaled price based on auction parameters.
* @param _kicked The timestamp the auction was kicked.
* @param _available The initial available amount scaled 1e18.
* @param _timestamp The specific timestamp for calculating the price.
* @return . The calculated price scaled to 1e18.
*/
function _price(
uint256 _kicked,
uint256 _available,
uint256 _timestamp
) internal view virtual returns (uint256) {
if (_available == 0) return 0;
uint256 secondsElapsed = _timestamp - _kicked;
if (secondsElapsed > auctionLength) return 0;
// Exponential step decay from https://github.com/ajna-finance/ajna-core/blob/master/src/libraries/helpers/PoolHelper.sol
uint256 hoursComponent = 1e27 >> (secondsElapsed / 3600);
uint256 minutesComponent = Maths.rpow(
MINUTE_HALF_LIFE,
(secondsElapsed % 3600) / 60
);
uint256 initialPrice = Maths.wdiv(startingPrice * 1e18, _available);
return
(initialPrice * Maths.rmul(hoursComponent, minutesComponent)) /
1e27;
}
/*//////////////////////////////////////////////////////////////
SETTERS
//////////////////////////////////////////////////////////////*/
/**
* @notice Enables a new auction.
* @param _from The address of the token to be auctioned.
*/
function enable(address _from) external virtual onlyGovernance {
address _want = want();
require(_from != address(0) && _from != _want, "ZERO ADDRESS");
require(auctions[_from].scaler == 0, "already enabled");
// Cannot have more than 18 decimals.
uint256 decimals = ERC20(_from).decimals();
require(decimals <= 18, "unsupported decimals");
// Store all needed info.
auctions[_from].scaler = uint64(WAD / 10 ** decimals);
ERC20(_from).forceApprove(VAULT_RELAYER, type(uint256).max);
// Add to the array.
enabledAuctions.push(_from);
emit AuctionEnabled(_from, _want);
}
/**
* @notice Disables an existing auction.
* @dev Only callable by governance.
* @param _from The address of the token being sold.
*/
function disable(address _from) external virtual {
disable(_from, 0);
}
/**
* @notice Disables an existing auction.
* @dev Only callable by governance.
* @param _from The address of the token being sold.
* @param _index The index the auctionId is at in the array.
*/
function disable(
address _from,
uint256 _index
) public virtual onlyGovernance {
// Make sure the auction was enabled.
require(auctions[_from].scaler != 0, "not enabled");
// Remove the struct.
delete auctions[_from];
ERC20(_from).forceApprove(VAULT_RELAYER, 0);
// Remove the auction ID from the array.
address[] memory _enabledAuctions = enabledAuctions;
if (_enabledAuctions[_index] != _from) {
// If the _index given is not the id find it.
for (uint256 i = 0; i < _enabledAuctions.length; ++i) {
if (_enabledAuctions[i] == _from) {
_index = i;
break;
}
}
}
// Move the id to the last spot if not there.
if (_index < _enabledAuctions.length - 1) {
_enabledAuctions[_index] = _enabledAuctions[
_enabledAuctions.length - 1
];
// Update the array.
enabledAuctions = _enabledAuctions;
}
// Pop the id off the array.
enabledAuctions.pop();
emit AuctionDisabled(_from, want());
}
/**
* @notice Sets the starting price for the auction.
* @param _startingPrice The new starting price for the auction.
*/
function setStartingPrice(
uint256 _startingPrice
) external virtual onlyGovernance {
require(_startingPrice != 0, "starting price");
// Don't change the price when an auction is active.
address[] memory _enabledAuctions = enabledAuctions;
for (uint256 i = 0; i < _enabledAuctions.length; ++i) {
require(!isActive(_enabledAuctions[i]), "active auction");
}
startingPrice = _startingPrice;
emit UpdatedStartingPrice(_startingPrice);
}
/*//////////////////////////////////////////////////////////////
PARTICIPATE IN AUCTION
//////////////////////////////////////////////////////////////*/
/**
* @notice Kicks off an auction, updating its status and making funds available for bidding.
* @param _from The address of the token to be auctioned.
* @return _available The available amount for bidding on in the auction.
*/
function kick(
address _from
) external virtual nonReentrant returns (uint256 _available) {
require(auctions[_from].scaler != 0, "not enabled");
require(
block.timestamp > auctions[_from].kicked + auctionLength,
"too soon"
);
// Just use current balance.
_available = ERC20(_from).balanceOf(address(this));
require(_available != 0, "nothing to kick");
// Update the auctions status.
auctions[_from].kicked = uint64(block.timestamp);
auctions[_from].initialAvailable = uint128(_available);
emit AuctionKicked(_from, _available);
}
/**
* @notice Take the token being sold in a live auction.
* @dev Defaults to taking the full amount and sending to the msg sender.
* @param _from The address of the token to be auctioned.
* @return . The amount of fromToken taken in the auction.
*/
function take(address _from) external virtual returns (uint256) {
return _take(_from, type(uint256).max, msg.sender, new bytes(0));
}
/**
* @notice Take the token being sold in a live auction with a specified maximum amount.
* @dev Will send the funds to the msg sender.
* @param _from The address of the token to be auctioned.
* @param _maxAmount The maximum amount of fromToken to take in the auction.
* @return . The amount of fromToken taken in the auction.
*/
function take(
address _from,
uint256 _maxAmount
) external virtual returns (uint256) {
return _take(_from, _maxAmount, msg.sender, new bytes(0));
}
/**
* @notice Take the token being sold in a live auction.
* @param _from The address of the token to be auctioned.
* @param _maxAmount The maximum amount of fromToken to take in the auction.
* @param _receiver The address that will receive the fromToken.
* @return _amountTaken The amount of fromToken taken in the auction.
*/
function take(
address _from,
uint256 _maxAmount,
address _receiver
) external virtual returns (uint256) {
return _take(_from, _maxAmount, _receiver, new bytes(0));
}
/**
* @notice Take the token being sold in a live auction.
* @param _from The address of the token to be auctioned.
* @param _maxAmount The maximum amount of fromToken to take in the auction.
* @param _receiver The address that will receive the fromToken.
* @param _data The data signify the callback should be used and sent with it.
* @return _amountTaken The amount of fromToken taken in the auction.
*/
function take(
address _from,
uint256 _maxAmount,
address _receiver,
bytes calldata _data
) external virtual returns (uint256) {
return _take(_from, _maxAmount, _receiver, _data);
}
/// @dev Implements the take of the auction.
function _take(
address _from,
uint256 _maxAmount,
address _receiver,
bytes memory _data
) internal virtual nonReentrant returns (uint256 _amountTaken) {
AuctionInfo memory auction = auctions[_from];
// Make sure the auction is active.
require(
auction.kicked + auctionLength >= block.timestamp,
"not kicked"
);
// Max amount that can be taken.
uint256 _available = available(_from);
_amountTaken = _available > _maxAmount ? _maxAmount : _available;
// Get the amount needed
uint256 needed = _getAmountNeeded(
auction,
_amountTaken,
block.timestamp
);
require(needed != 0, "zero needed");
// Send `from`.
ERC20(_from).safeTransfer(_receiver, _amountTaken);
// If the caller has specified data.
if (_data.length != 0) {
// Do the callback.
ITaker(_receiver).auctionTakeCallback(
_from,
msg.sender,
_amountTaken,
needed,
_data
);
}
// Cache the want address.
address _want = want();
// Pull `want`.
ERC20(_want).safeTransferFrom(msg.sender, receiver, needed);
}
/// @dev Validates a COW order signature.
function isValidSignature(
bytes32 _hash,
bytes calldata signature
) external view returns (bytes4) {
// Make sure `_take` has not already been entered.
require(!_reentrancyGuardEntered(), "ReentrancyGuard: reentrant call");
// Decode the signature to get the order.
GPv2Order.Data memory order = abi.decode(signature, (GPv2Order.Data));
AuctionInfo memory auction = auctions[address(order.sellToken)];
// Get the current amount needed for the auction.
uint256 paymentAmount = _getAmountNeeded(
auction,
order.sellAmount,
block.timestamp
);
// Verify the order details.
require(_hash == order.hash(COW_DOMAIN_SEPARATOR), "bad order");
require(paymentAmount != 0, "zero amount");
require(available(address(order.sellToken)) != 0, "zero available");
require(order.feeAmount == 0, "fee");
require(order.partiallyFillable, "partial fill");
require(order.validTo < auction.kicked + auctionLength, "expired");
require(order.appData == bytes32(0), "app data");
require(order.buyAmount >= paymentAmount, "bad price");
require(address(order.buyToken) == want(), "bad token");
require(order.receiver == receiver, "bad receiver");
require(order.sellAmount <= auction.initialAvailable, "bad amount");
// If all checks pass, return the magic value
return this.isValidSignature.selector;
}
/**
* @notice Allows the auction to be stopped if the full amount is taken.
* @param _from The address of the token to be auctioned.
*/
function settle(address _from) external virtual {
require(isActive(_from), "!active");
require(ERC20(_from).balanceOf(address(this)) == 0, "!empty");
auctions[_from].kicked = uint64(0);
}
function sweep(address _token) external virtual onlyGovernance {
ERC20(_token).safeTransfer(
msg.sender,
ERC20(_token).balanceOf(address(this))
);
}
}
// src/RewardHandler.sol
contract RewardHandler is Clonable {
using SafeERC20 for ERC20;
address public want;
address public strategy;
constructor() {
original = address(this);
strategy = address(1);
}
function clone() external returns (address) {
return _clone();
}
function claimRewards() external {
uint256 balance = ERC20(want).balanceOf(address(this));
if (balance == 0) return;
ERC20(want).forceApprove(strategy, balance);
IStrategyInterface(strategy).notifyRewardAmount(want, balance);
}
function initialize(address _strategy) external {
require(strategy == address(0), "Already initialized");
require(_strategy != address(0), "bad strategy");
address _want = IStrategyInterface(_strategy).want();
want = _want;
strategy = _strategy;
}
}
// lib/tokenized-strategy-periphery/src/Bases/Staker/TokenizedStaker.sol
abstract contract TokenizedStaker is BaseHooks, ReentrancyGuard {
using SafeERC20 for ERC20;
struct Reward {
/// @notice The only address able to top up rewards for a token (aka notifyRewardAmount()).
address rewardsDistributor;
/// @notice The duration of our rewards distribution for staking, default is 7 days.
uint96 rewardsDuration;
/// @notice The end (timestamp) of our current or most recent reward period.
uint96 periodFinish;
/**
* @notice The last time rewards were updated, triggered by updateReward() or notifyRewardAmount().
* @dev Will be the timestamp of the update or the end of the period, whichever is earlier.
*/
uint96 lastUpdateTime;
/// @notice The distribution rate of reward token per second.
uint128 rewardRate;
/**
* @notice The most recent stored amount for rewardPerToken().
* @dev Updated every time anyone calls the updateReward() modifier.
*/
uint128 rewardPerTokenStored;
/**
* @notice The last time a notifyRewardAmount was called.
* @dev Used for lastRewardRate, a rewardRate equivalent for instant reward releases.
*/
uint96 lastNotifyTime;
/// @notice The last rewardRate before a notifyRewardAmount was called
uint128 lastRewardRate;
}
/* ========== EVENTS ========== */
event RewardTokenAdded(
address indexed rewardToken,
address indexed rewardsDistributor,
uint256 rewardsDuration
);
event RewardAdded(address indexed rewardToken, uint256 reward);
event RewardPaid(
address indexed user,
address indexed rewardToken,
uint256 reward
);
event RewardsDistributorUpdated(
address indexed rewardToken,
address indexed rewardsDistributor
);
event RewardsDurationUpdated(
address indexed rewardToken,
uint256 newDuration
);
event ClaimForRecipientUpdated(
address indexed staker,
address indexed recipient
);
event NotifiedWithZeroSupply(address indexed rewardToken, uint256 reward);
event Recovered(address token, uint256 amount);
/* ========== MODIFIERS ========== */
modifier updateReward(address _account) {
_updateReward(_account);
_;
}
function _updateReward(address _account) internal virtual {
for (uint256 i; i < rewardTokens.length; ++i) {
address rewardToken = rewardTokens[i];
rewardData[rewardToken].rewardPerTokenStored = uint128(
rewardPerToken(rewardToken)
);
rewardData[rewardToken].lastUpdateTime = uint96(
lastTimeRewardApplicable(rewardToken)
);
if (_account != address(0)) {
rewards[_account][rewardToken] = earned(_account, rewardToken);
userRewardPerTokenPaid[_account][rewardToken] = rewardData[
rewardToken
].rewardPerTokenStored;
}
}
}
/// @notice Array containing the addresses of all of our reward tokens.
address[] public rewardTokens;
/// @notice The address of our reward token => reward info.
mapping(address => Reward) public rewardData;
/**
* @notice Mapping for staker address => address that can claim+receive tokens for them.
* @dev This mapping can only be updated by management.
*/
mapping(address => address) public claimForRecipient;
/**
* @notice The amount of rewards allocated to a user per whole token staked.
* @dev Note that this is not the same as amount of rewards claimed. Mapping order is user -> reward token -> amount
*/
mapping(address => mapping(address => uint256))
public userRewardPerTokenPaid;
/**
* @notice The amount of unclaimed rewards an account is owed.
* @dev Mapping order is user -> reward token -> amount
*/
mapping(address => mapping(address => uint256)) public rewards;
uint256 internal constant PRECISION = 1e18;
constructor(address _asset, string memory _name) BaseHooks(_asset, _name) {}
function _preDepositHook(
uint256 /* assets */,
uint256 /* shares */,
address receiver
) internal virtual override {
_updateReward(receiver);
}
function _preWithdrawHook(
uint256 /* assets */,
uint256 /* shares */,
address /* receiver */,
address owner,
uint256 /* maxLoss */
) internal virtual override {
_updateReward(owner);
}
function _preTransferHook(
address from,
address to,
uint256 /* amount */
) internal virtual override {
_updateReward(from);
_updateReward(to);
}
// Need to update fee recipients before reporting to ensure accurate accounting
// since fees are issued as shares to the recipients outside normal functionality.
function _preReportHook() internal virtual override {
_updateReward(TokenizedStrategy.performanceFeeRecipient());
(uint16 feeBps, address protocolFeeRecipient) = IVaultFactory(
TokenizedStrategy.FACTORY()
).protocol_fee_config();
if (feeBps > 0) {
_updateReward(protocolFeeRecipient);
}
}
/**
* @notice Get all reward tokens.
* @return rewardTokens Array of reward token addresses.
*/
function getRewardTokens()
external
view
virtual
returns (address[] memory)
{
return rewardTokens;
}
/// @notice Either the current timestamp or end of the most recent period.
function lastTimeRewardApplicable(
address _rewardToken
) public view virtual returns (uint256) {
return
block.timestamp < rewardData[_rewardToken].periodFinish
? block.timestamp
: rewardData[_rewardToken].periodFinish;
}
/// @notice Reward paid out per whole token.
function rewardPerToken(
address _rewardToken
) public view virtual returns (uint256) {
// store in memory to save gas
Reward memory _rewardData = rewardData[_rewardToken];
uint256 totalSupply = _totalSupply();
if (totalSupply == 0 || _rewardData.rewardsDuration == 1) {
return _rewardData.rewardPerTokenStored;
}
return
_rewardData.rewardPerTokenStored +
(((lastTimeRewardApplicable(_rewardToken) -
_rewardData.lastUpdateTime) *
_rewardData.rewardRate *
PRECISION) / totalSupply);
}
/// @notice Amount of reward token pending claim by an account.
function earned(
address _account,
address _rewardToken
) public view virtual returns (uint256) {
return
(TokenizedStrategy.balanceOf(_account) *
(rewardPerToken(_rewardToken) -
userRewardPerTokenPaid[_account][_rewardToken])) /
PRECISION +
rewards[_account][_rewardToken];
}
/**
* @notice Amount of reward token(s) pending claim by an account.
* @dev Checks for all rewardTokens.
* @param _account Account to check earned balance for.
* @return pending Amount of reward token(s) pending claim.
*/
function earnedMulti(
address _account
) public view virtual returns (uint256[] memory pending) {
address[] memory _rewardTokens = rewardTokens;
uint256 length = _rewardTokens.length;
pending = new uint256[](length);
for (uint256 i; i < length; ++i) {
pending[i] = earned(_account, _rewardTokens[i]);
}
}
/// @notice Reward tokens emitted over the entire rewardsDuration.
function getRewardForDuration(
address _rewardToken
) external view virtual returns (uint256) {
// note that if rewards are instant released, this will always return zero
return
rewardData[_rewardToken].rewardRate *
rewardData[_rewardToken].rewardsDuration;
}
/// @notice Correct Total supply for the locked shares from profits
function _totalSupply() internal view virtual returns (uint256) {
return
TokenizedStrategy.totalSupply() -
TokenizedStrategy.balanceOf(address(this));
}
/**
* @notice Notify staking contract that it has more reward to account for.
* @dev May only be called by rewards distribution role or management. Set up token first via addReward().
* @param _rewardToken Address of the rewards token.
* @param _rewardAmount Amount of reward tokens to add.
*/
function notifyRewardAmount(
address _rewardToken,
uint256 _rewardAmount
) external virtual {
require(
rewardData[_rewardToken].rewardsDistributor == msg.sender ||
msg.sender == TokenizedStrategy.management(),
"!authorized"
);
// handle the transfer of reward tokens via `transferFrom` to reduce the number
// of transactions required and ensure correctness of the reward amount
ERC20(_rewardToken).safeTransferFrom(
msg.sender,
address(this),
_rewardAmount
);
_notifyRewardAmount(_rewardToken, _rewardAmount);
}
function _notifyRewardAmount(
address _rewardToken,
uint256 _rewardAmount
) internal virtual updateReward(address(0)) {
Reward memory _rewardData = rewardData[_rewardToken];
require(_rewardAmount > 0 && _rewardAmount < 1e30, "bad reward value");
// If total supply is 0, send tokens to management instead of reverting.
// Prevent footguns if _notifyRewardInstant() is part of predeposit hooks.
uint256 totalSupply = _totalSupply();
if (totalSupply == 0) {
address management = TokenizedStrategy.management();
ERC20(_rewardToken).safeTransfer(management, _rewardAmount);
emit NotifiedWithZeroSupply(_rewardToken, _rewardAmount);
return;
}
// this is the only part of the struct that will be the same for instant or normal
_rewardData.lastUpdateTime = uint96(block.timestamp);
/// @dev A rewardsDuration of 1 dictates instant release of rewards
if (_rewardData.rewardsDuration == 1) {
// Update lastNotifyTime and lastRewardRate if needed (would revert if in the same block otherwise)
if (uint96(block.timestamp) != _rewardData.lastNotifyTime) {
_rewardData.lastRewardRate = uint128(
_rewardAmount /
(block.timestamp - _rewardData.lastNotifyTime)
);
_rewardData.lastNotifyTime = uint96(block.timestamp);
}
// Update rewardRate, lastUpdateTime, periodFinish
_rewardData.rewardRate = 0;
_rewardData.periodFinish = uint96(block.timestamp);
// Instantly release rewards by modifying rewardPerTokenStored
_rewardData.rewardPerTokenStored = uint128(
_rewardData.rewardPerTokenStored +
(_rewardAmount * PRECISION) /
totalSupply
);
} else {
// store current rewardRate
_rewardData.lastRewardRate = _rewardData.rewardRate;
_rewardData.lastNotifyTime = uint96(block.timestamp);
// update our rewardData with our new rewardRate
if (block.timestamp >= _rewardData.periodFinish) {
_rewardData.rewardRate = uint128(
_rewardAmount / _rewardData.rewardsDuration
);
} else {
_rewardData.rewardRate = uint128(
(_rewardAmount +
(_rewardData.periodFinish - block.timestamp) *
_rewardData.rewardRate) / _rewardData.rewardsDuration
);
}
// update time-based struct fields
_rewardData.periodFinish = uint96(
block.timestamp + _rewardData.rewardsDuration
);
}
// make sure we have enough reward token for our new rewardRate
require(
_rewardData.rewardRate <=
(ERC20(_rewardToken).balanceOf(address(this)) /
_rewardData.rewardsDuration),
"Not enough balance"
);
// write to storage
rewardData[_rewardToken] = _rewardData;
emit RewardAdded(_rewardToken, _rewardAmount);
}
/**
* @notice Claim any (and all) earned reward tokens.
* @dev Can claim rewards even if no tokens still staked.
*/
function getReward()
external
virtual
nonReentrant
updateReward(msg.sender)
{
_getRewardFor(msg.sender, msg.sender);
}
/**
* @notice Claim any (and all) earned reward tokens for another user.
* @dev Mapping must be manually updated via management. Must be called by recipient.
* @param _staker Address of the user to claim rewards for.
*/
function getRewardFor(
address _staker
) external virtual nonReentrant updateReward(_staker) {
require(claimForRecipient[_staker] == msg.sender, "!recipient");
_getRewardFor(_staker, msg.sender);
}
// internal function to get rewards.
function _getRewardFor(
address _staker,
address _recipient
) internal virtual {
for (uint256 i; i < rewardTokens.length; ++i) {
address _rewardToken = rewardTokens[i];
_getOneReward(_rewardToken, _staker, _recipient);
}
}
/**
* @notice Claim any one earned reward token.
* @dev Can claim rewards even if no tokens still staked.
* @param _rewardToken Address of the rewards token to claim.
*/
function getOneReward(
address _rewardToken
) external virtual nonReentrant updateReward(msg.sender) {
_getOneReward(_rewardToken, msg.sender, msg.sender);
}
/**
* @notice Claim any one earned reward token for another user.
* @dev Can claim rewards even if no tokens still staked.
* @param _rewardToken Address of the rewards token to claim.
* @param _staker Address of the user to claim rewards for.
*/
function getOneRewardFor(
address _rewardToken,
address _staker
) external virtual nonReentrant updateReward(_staker) {
require(claimForRecipient[_staker] == msg.sender, "!recipient");
_getOneReward(_rewardToken, _staker, msg.sender);
}
function _getOneReward(
address _rewardToken,
address _staker,
address _recipient
) internal virtual {
uint256 reward = rewards[_staker][_rewardToken];
if (reward > 0) {
rewards[_staker][_rewardToken] = 0;
ERC20(_rewardToken).safeTransfer(_recipient, reward);
emit RewardPaid(_staker, _rewardToken, reward);
}
}
/// @notice Unstake all of the sender's tokens and claim any outstanding rewards.
function exit() external virtual {
redeem(
TokenizedStrategy.balanceOf(msg.sender),
msg.sender,
msg.sender,
10_000
);
_getRewardFor(msg.sender, msg.sender);
}
/**
* @notice Add a new reward token to the staking contract.
* @dev May only be called by management, and can't be set to zero address. Add reward tokens sparingly, as each new
* one will increase gas costs. This must be set before notifyRewardAmount can be used. A rewardsDuration of 1
* dictates instant release of rewards.
* @param _rewardToken Address of the rewards token.
* @param _rewardsDistributor Address of the rewards distributor.
* @param _rewardsDuration The duration of our rewards distribution for staking in seconds. Set to 1 for instant
* rewards distribution.
*/
function addReward(
address _rewardToken,
address _rewardsDistributor,
uint256 _rewardsDuration
) external virtual onlyManagement {
_addReward(_rewardToken, _rewardsDistributor, _rewardsDuration);
}
/// @dev Internal function to add a new reward token to the staking contract.
function _addReward(
address _rewardToken,
address _rewardsDistributor,
uint256 _rewardsDuration
) internal virtual {
require(
_rewardToken != address(0) && _rewardsDistributor != address(0),
"No zero address"
);
require(_rewardsDuration > 0, "Must be >0");
require(
rewardData[_rewardToken].rewardsDuration == 0,
"Reward already added"
);
rewardTokens.push(_rewardToken);
rewardData[_rewardToken].rewardsDistributor = _rewardsDistributor;
rewardData[_rewardToken].rewardsDuration = uint96(_rewardsDuration);
emit RewardTokenAdded(
_rewardToken,
_rewardsDistributor,
_rewardsDuration
);
}
/**
* @notice Set the rewards distributor for a reward token.
* @dev May only be called by management.
* @param _rewardToken Address of the rewards token.
* @param _rewardsDistributor Address of the rewards distributor.
*/
function setRewardsDistributor(
address _rewardToken,
address _rewardsDistributor
) external virtual onlyManagement {
_setRewardsDistributor(_rewardToken, _rewardsDistributor);
}
function _setRewardsDistributor(
address _rewardToken,
address _rewardsDistributor
) internal virtual {
require(
rewardData[_rewardToken].rewardsDistributor != address(0),
"Reward token not added"
);
require(_rewardsDistributor != address(0), "No zero address");
rewardData[_rewardToken].rewardsDistributor = _rewardsDistributor;
emit RewardsDistributorUpdated(_rewardToken, _rewardsDistributor);
}
/**
* @notice Set the duration of our rewards period.
* @dev May only be called by management, and must be done after most recent period ends.
* @param _rewardToken Address of the rewards token.
* @param _rewardsDuration New length of period in seconds. Set to 1 for instant rewards release.
*/
function setRewardsDuration(
address _rewardToken,
uint256 _rewardsDuration
) external virtual onlyManagement {
_setRewardsDuration(_rewardToken, _rewardsDuration);
}
function _setRewardsDuration(
address _rewardToken,
uint256 _rewardsDuration
) internal virtual {
_updateReward(address(0));
// Previous rewards period must be complete before changing the duration for the new period
require(
block.timestamp > rewardData[_rewardToken].periodFinish,
"!period"
);
require(_rewardsDuration > 0, "Must be >0");
rewardData[_rewardToken].rewardsDuration = uint96(_rewardsDuration);
emit RewardsDurationUpdated(_rewardToken, _rewardsDuration);
}
/**
* @notice Setup a staker-recipient pair.
* @dev May only be called by management. Useful for contracts that can't handle extra reward tokens to direct
* rewards elsewhere.
* @param _staker Address that holds the vault tokens.
* @param _recipient Address to claim and receive extra rewards on behalf of _staker.
*/
function setClaimFor(
address _staker,
address _recipient
) external virtual onlyManagement {
_setClaimFor(_staker, _recipient);
}
/**
* @notice Give another address permission to claim (and receive!) your rewards.
* @dev Useful if we want to add in complex logic following rewards claim such as staking.
* @param _recipient Address to claim and receive extra rewards on behalf of msg.sender.
*/
function setClaimForSelf(address _recipient) external virtual {
_setClaimFor(msg.sender, _recipient);
}
function _setClaimFor(
address _staker,
address _recipient
) internal virtual {
require(_staker != address(0), "No zero address");
claimForRecipient[_staker] = _recipient;
emit ClaimForRecipientUpdated(_staker, _recipient);
}
/**
* @notice Sweep out tokens accidentally sent here.
* @dev May only be called by management. If a pool has multiple tokens to sweep out, call this once for each.
* @param _tokenAddress Address of token to sweep.
* @param _tokenAmount Amount of tokens to sweep.
*/
function recoverERC20(
address _tokenAddress,
uint256 _tokenAmount
) external virtual onlyManagement {
require(_tokenAddress != address(asset), "!asset");
// can only recover reward tokens 90 days after last reward token ends
bool isRewardToken;
address[] memory _rewardTokens = rewardTokens;
uint256 maxPeriodFinish;
for (uint256 i; i < _rewardTokens.length; ++i) {
uint256 rewardPeriodFinish = rewardData[_rewardTokens[i]]
.periodFinish;
if (rewardPeriodFinish > maxPeriodFinish) {
maxPeriodFinish = rewardPeriodFinish;
}
if (_rewardTokens[i] == _tokenAddress) {
isRewardToken = true;
}
}
if (isRewardToken) {
require(
block.timestamp > maxPeriodFinish + 90 days,
"wait >90 days"
);
// if we do this, automatically sweep all reward token
_tokenAmount = ERC20(_tokenAddress).balanceOf(address(this));
}
ERC20(_tokenAddress).safeTransfer(
TokenizedStrategy.management(),
_tokenAmount
);
emit Recovered(_tokenAddress, _tokenAmount);
}
}
// src/YearnYieldSplitter.sol
contract YearnYieldSplitter is TokenizedStaker {
using SafeERC20 for ERC20;
/// @notice The vault that the `asset` is deposited into.
IERC4626 public immutable vault;
/// @notice The token that the yield is converted into.
address public immutable want;
/// @notice The reward handler that will claim rewards and notify the strategy.
address public immutable rewardHandler;
/// @notice The auction that the `asset` is auctioned off in.
Auction public auction;
constructor(
address _asset,
string memory _name,
address _vault,
address _want,
address _rewardHandler
) TokenizedStaker(_asset, _name) {
asset.forceApprove(_vault, type(uint256).max);
vault = IERC4626(_vault);
want = _want;
rewardHandler = _rewardHandler;
_addReward(want, rewardHandler, 3 days);
}
/*//////////////////////////////////////////////////////////////
NEEDED TO BE OVERRIDDEN BY STRATEGIST
//////////////////////////////////////////////////////////////*/
/**
* @dev Can deploy up to '_amount' of 'asset' in the yield source.
*
* This function is called at the end of a {deposit} or {mint}
* call. Meaning that unless a whitelist is implemented it will
* be entirely permissionless and thus can be sandwiched or otherwise
* manipulated.
*
* @param _amount The amount of 'asset' that the strategy can attempt
* to deposit in the yield source.
*/
function _deployFunds(uint256 _amount) internal override {
vault.deposit(_amount, address(this));
}
/**
* @dev Should attempt to free the '_amount' of 'asset'.
*
* NOTE: The amount of 'asset' that is already loose has already
* been accounted for.
*
* This function is called during {withdraw} and {redeem} calls.
* Meaning that unless a whitelist is implemented it will be
* entirely permissionless and thus can be sandwiched or otherwise
* manipulated.
*
* Should not rely on asset.balanceOf(address(this)) calls other than
* for diff accounting purposes.
*
* Any difference between `_amount` and what is actually freed will be
* counted as a loss and passed on to the withdrawer. This means
* care should be taken in times of illiquidity. It may be better to revert
* if withdraws are simply illiquid so not to realize incorrect losses.
*
* @param _amount, The amount of 'asset' to be freed.
*/
function _freeFunds(uint256 _amount) internal override {
// Use previewWithdraw to round up.
uint256 shares = vault.previewWithdraw(_amount);
shares = Math.min(shares, balanceOfVault());
vault.redeem(shares, address(this), address(this));
}
/**
* @dev Internal function to harvest all rewards, redeploy any idle
* funds and return an accurate accounting of all funds currently
* held by the Strategy.
*
* This should do any needed harvesting, rewards selling, accrual,
* redepositing etc. to get the most accurate view of current assets.
*
* NOTE: All applicable assets including loose assets should be
* accounted for in this function.
*
* Care should be taken when relying on oracles or swap values rather
* than actual amounts as all Strategy profit/loss accounting will
* be done based on this returned value.
*
* This can still be called post a shutdown, a strategist can check
* `TokenizedStrategy.isShutdown()` to decide if funds should be
* redeployed or simply realize any profits/losses.
*
* @return _totalAssets A trusted and accurate account for the total
* amount of 'asset' the strategy currently holds including idle funds.
*/
function _harvestAndReport()
internal
override
returns (uint256 _totalAssets)
{
// Claim and notify pending rewards.
claimRewards();
_totalAssets = TokenizedStrategy.totalAssets();
// Settle if already taken but not done.
if (auction.isActive(address(asset))) {
if (auction.available(address(asset)) == 0) {
auction.settle(address(asset));
} else {
// If still active just return.
return _totalAssets;
}
}
uint256 looseAssets = balanceOfAsset();
uint256 currentAssets = looseAssets + valueOfVault();
uint256 profit;
if (currentAssets > _totalAssets) {
profit = currentAssets - _totalAssets;
if (profit > looseAssets) {
_freeFunds(profit - looseAssets);
}
// Adjust for any rounding losses on withdraw.
profit = Math.min(profit, balanceOfAsset());
// If no profit return
} else {
return _totalAssets;
}
// Fees
uint256 fee = (profit * TokenizedStrategy.performanceFee()) / 10_000;
asset.safeTransfer(TokenizedStrategy.performanceFeeRecipient(), fee);
// Kick next auction
asset.safeTransfer(address(auction), profit - fee);
auction.kick(address(asset));
}
function claimRewards() public {
RewardHandler(rewardHandler).claimRewards();
}
function balanceOfVault() public view returns (uint256) {
return vault.balanceOf(address(this));
}
function balanceOfAsset() public view returns (uint256) {
return asset.balanceOf(address(this));
}
function valueOfVault() public view virtual returns (uint256) {
return vault.convertToAssets(balanceOfVault());
}
function vaultsMaxWithdraw() public view virtual returns (uint256) {
return vault.convertToAssets(vault.maxRedeem(address(this)));
}
/*//////////////////////////////////////////////////////////////
OPTIONAL TO OVERRIDE BY STRATEGIST
//////////////////////////////////////////////////////////////*/
/**
* @notice Gets the max amount of `asset` that can be withdrawn.
* @dev Defaults to an unlimited amount for any address. But can
* be overridden by strategists.
*
* This function will be called before any withdraw or redeem to enforce
* any limits desired by the strategist. This can be used for illiquid
* or sandwichable strategies.
*
* EX:
* return asset.balanceOf(yieldSource);
*
* This does not need to take into account the `_owner`'s share balance
* or conversion rates from shares to assets.
*
* @param . The address that is withdrawing from the strategy.
* @return . The available amount that can be withdrawn in terms of `asset`
*/
function availableWithdrawLimit(
address /*_owner*/
) public view override returns (uint256) {
return balanceOfAsset() + vaultsMaxWithdraw();
}
/**
* @notice Gets the max amount of `asset` that an address can deposit.
* @dev Defaults to an unlimited amount for any address. But can
* be overridden by strategists.
*
* This function will be called before any deposit or mints to enforce
* any limits desired by the strategist. This can be used for either a
* traditional deposit limit or for implementing a whitelist etc.
*
* EX:
* if(isAllowed[_owner]) return super.availableDepositLimit(_owner);
*
* This does not need to take into account any conversion rates
* from shares to assets. But should know that any non max uint256
* amounts may be converted to shares. So it is recommended to keep
* custom amounts low enough as not to cause overflow when multiplied
* by `totalSupply`.
*
* @param . The address that is depositing into the strategy.
* @return . The available amount the `_owner` can deposit in terms of `asset`
*/
function availableDepositLimit(address)
public
view
override
returns (uint256)
{
return vault.maxDeposit(address(this));
}
/**
* @dev Optional function for a strategist to override that will
* allow management to manually withdraw deployed funds from the
* yield source if a strategy is shutdown.
*
* This should attempt to free `_amount`, noting that `_amount` may
* be more than is currently deployed.
*
* NOTE: This will not realize any profits or losses. A separate
* {report} will be needed in order to record any profit/loss. If
* a report may need to be called after a shutdown it is important
* to check if the strategy is shutdown during {_harvestAndReport}
* so that it does not simply re-deploy all funds that had been freed.
*
* EX:
* if(freeAsset > 0 && !TokenizedStrategy.isShutdown()) {
* depositFunds...
* }
*
* @param _amount The amount of asset to attempt to free.
*/
function _emergencyWithdraw(uint256 _amount) internal override {
_freeFunds(Math.min(_amount, vaultsMaxWithdraw()));
}
function setAuction(address _auction) external onlyManagement {
require(Auction(_auction).want() == want, "Invalid want");
require(
Auction(_auction).receiver() == rewardHandler,
"Invalid receiver"
);
(, uint64 scaler, ) = Auction(_auction).auctions(address(asset));
require(scaler != 0, "asset not enabled");
auction = Auction(_auction);
}
}{
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 200
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
Contract ABI
API[{"inputs":[{"internalType":"address","name":"_asset","type":"address"},{"internalType":"string","name":"_name","type":"string"},{"internalType":"address","name":"_vault","type":"address"},{"internalType":"address","name":"_want","type":"address"},{"internalType":"address","name":"_rewardHandler","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"staker","type":"address"},{"indexed":true,"internalType":"address","name":"recipient","type":"address"}],"name":"ClaimForRecipientUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"rewardToken","type":"address"},{"indexed":false,"internalType":"uint256","name":"reward","type":"uint256"}],"name":"NotifiedWithZeroSupply","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Recovered","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"rewardToken","type":"address"},{"indexed":false,"internalType":"uint256","name":"reward","type":"uint256"}],"name":"RewardAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"address","name":"rewardToken","type":"address"},{"indexed":false,"internalType":"uint256","name":"reward","type":"uint256"}],"name":"RewardPaid","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"rewardToken","type":"address"},{"indexed":true,"internalType":"address","name":"rewardsDistributor","type":"address"},{"indexed":false,"internalType":"uint256","name":"rewardsDuration","type":"uint256"}],"name":"RewardTokenAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"rewardToken","type":"address"},{"indexed":true,"internalType":"address","name":"rewardsDistributor","type":"address"}],"name":"RewardsDistributorUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"rewardToken","type":"address"},{"indexed":false,"internalType":"uint256","name":"newDuration","type":"uint256"}],"name":"RewardsDurationUpdated","type":"event"},{"stateMutability":"nonpayable","type":"fallback"},{"inputs":[{"internalType":"address","name":"_rewardToken","type":"address"},{"internalType":"address","name":"_rewardsDistributor","type":"address"},{"internalType":"uint256","name":"_rewardsDuration","type":"uint256"}],"name":"addReward","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"auction","outputs":[{"internalType":"contract Auction","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"availableDepositLimit","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"availableWithdrawLimit","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"balanceOfAsset","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"balanceOfVault","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"claimForRecipient","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"claimRewards","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"deployFunds","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"assets","type":"uint256"},{"internalType":"address","name":"receiver","type":"address"}],"name":"deposit","outputs":[{"internalType":"uint256","name":"shares","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"doHealthCheck","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_account","type":"address"},{"internalType":"address","name":"_rewardToken","type":"address"}],"name":"earned","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_account","type":"address"}],"name":"earnedMulti","outputs":[{"internalType":"uint256[]","name":"pending","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"exit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"freeFunds","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_rewardToken","type":"address"}],"name":"getOneReward","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_rewardToken","type":"address"},{"internalType":"address","name":"_staker","type":"address"}],"name":"getOneRewardFor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getReward","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_staker","type":"address"}],"name":"getRewardFor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_rewardToken","type":"address"}],"name":"getRewardForDuration","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getRewardTokens","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"harvestAndReport","outputs":[{"internalType":"uint256","name":"_totalAssets","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_rewardToken","type":"address"}],"name":"lastTimeRewardApplicable","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lossLimitRatio","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"shares","type":"uint256"},{"internalType":"address","name":"receiver","type":"address"}],"name":"mint","outputs":[{"internalType":"uint256","name":"assets","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_rewardToken","type":"address"},{"internalType":"uint256","name":"_rewardAmount","type":"uint256"}],"name":"notifyRewardAmount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"profitLimitRatio","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_tokenAddress","type":"address"},{"internalType":"uint256","name":"_tokenAmount","type":"uint256"}],"name":"recoverERC20","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"shares","type":"uint256"},{"internalType":"address","name":"receiver","type":"address"},{"internalType":"address","name":"owner","ty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IERC4626","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"vaultsMaxWithdraw","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"want","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"assets","type":"uint256"},{"internalType":"address","name":"receiver","type":"address"},{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint256","name":"maxLoss","type":"uint256"}],"name":"withdraw","outputs":[{"internalType":"uint256","name":"shares","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"assets","type":"uint256"},{"internalType":"address","name":"receiver","type":"address"},{"internalType":"address","name":"owner","type":"address"}],"name":"withdraw","outputs":[{"internalType":"uint256","name":"shares","type":"uint256"}],"stateMutability":"nonpayable","type":"function"}]Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
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
-----Decoded View---------------
Arg [0] : _asset (address): 0x0eF68c1aB3C83CF11f9546FaBA385E8a1bd38d74
Arg [1] : _name (string): Yearn yvWOOFY to vbUSDS Yield Splitter
Arg [2] : _vault (address): 0x639bCcF37CC0415812A6f110CFCa33127a81c0e9
Arg [3] : _want (address): 0x62D6A123E8D19d06d68cf0d2294F9A3A0362c6b3
Arg [4] : _rewardHandler (address): 0xb1e013CB5e54AFCAFCb73CB5dcdc4eA962DaDFdD
-----Encoded View---------------
8 Constructor Arguments found :
Arg [0] : 0000000000000000000000000ef68c1ab3c83cf11f9546faba385e8a1bd38d74
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [2] : 000000000000000000000000639bccf37cc0415812a6f110cfca33127a81c0e9
Arg [3] : 00000000000000000000000062d6a123e8d19d06d68cf0d2294f9a3a0362c6b3
Arg [4] : 000000000000000000000000b1e013cb5e54afcafcb73cb5dcdc4ea962dadfdd
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000026
Arg [6] : 596561726e207976574f4f465920746f20766255534453205969656c64205370
Arg [7] : 6c69747465720000000000000000000000000000000000000000000000000000
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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.