Contract Name:
PirexDistributorZaps
Contract Source Code:
// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;
import "SafeERC20.sol";
import "IStrategyZaps.sol";
import "IGenericDistributor.sol";
contract PirexDistributorZaps {
using SafeERC20 for IERC20;
address public immutable zaps;
address public vault;
IGenericDistributor public distributor;
constructor(
address _strategyZaps,
address _distributor,
address _vault
) {
zaps = _strategyZaps;
distributor = IGenericDistributor(_distributor);
vault = _vault;
}
function setApprovals() external {
IERC20(vault).safeApprove(zaps, 0);
IERC20(vault).safeApprove(zaps, type(uint256).max);
}
/// @notice Claim from distributor and transfer back tokens to zap
function _claim(
uint256 index,
address account,
uint256 amount,
bytes32[] calldata merkleProof
) internal {
distributor.claim(index, account, amount, merkleProof);
IERC20(vault).safeTransferFrom(msg.sender, address(this), amount);
}
/// @notice Claim from distributor as USDT.
/// @param index - claimer index
/// @param account - claimer account
/// @param amount - claim amount
/// @param merkleProof - merkle proof for the claim
/// @param minAmountOut - the min expected amount of USDT to receive
/// @param to - the adress that will receive the USDT
/// @return amount of USDT obtained
function claimFromDistributorAsUsdt(
uint256 index,
address account,
uint256 amount,
bytes32[] calldata merkleProof,
uint256 minAmountOut,
address to
) external returns (uint256) {
_claim(index, account, amount, merkleProof);
return
IStrategyZaps(zaps).claimFromVaultAsUsdt(amount, minAmountOut, to);
}
/// @notice Claim to any token via a univ2 router
/// @notice Use at your own risk
/// @param amount - amount of uCRV to unstake
/// @param minAmountOut - min amount of output token expected
/// @param router - address of the router to use. e.g. 0xd9e1cE17f2641f24aE83637ab66a2cca9C378B9F for Sushi
/// @param outputToken - address of the token to swap to
/// @param to - address of the final recipient of the swapped tokens
function claimFromDistributorViaUniV2EthPair(
uint256 index,
address account,
uint256 amount,
bytes32[] calldata merkleProof,
uint256 minAmountOut,
address router,
address outputToken,
address to
) external {
_claim(index, account, amount, merkleProof);
IStrategyZaps(zaps).claimFromVaultViaUniV2EthPair(
amount,
minAmountOut,
router,
outputToken,
to
);
}
/// @notice Claim from distributor as ETH.
/// @param index - claimer index
/// @param account - claimer account
/// @param amount - claim amount
/// @param merkleProof - merkle proof for the claim
/// @param minAmountOut - min amount of CVX expected
/// @param to - address to lock on behalf of
function claimFromDistributorAsEth(
uint256 index,
address account,
uint256 amount,
bytes32[] calldata merkleProof,
uint256 minAmountOut,
address to
) external {
_claim(index, account, amount, merkleProof);
IStrategyZaps(zaps).claimFromVaultAsEth(amount, minAmountOut, to);
}
/// @notice Claim from distributor as CVX
/// @param index - claimer index
/// @param account - claimer account
/// @param amount - claim amount
/// @param merkleProof - merkle proof for the claim
/// @param minAmountOut - min amount of CVX expected
/// @param to - receiver
function claimFromDistributorAsCvx(
uint256 index,
address account,
uint256 amount,
bytes32[] calldata merkleProof,
uint256 minAmountOut,
address to
) external {
_claim(index, account, amount, merkleProof);
IStrategyZaps(zaps).claimFromVaultAsCvx(amount, minAmountOut, to);
}
/// @notice Claim from distributor as CRV
/// @param index - claimer index
/// @param account - claimer account
/// @param amount - claim amount
/// @param merkleProof - merkle proof for the claim
/// @param minAmountOut - min amount of CRV expected
/// @param to - address to lock on behalf of
function claimFromDistributorAsCrv(
uint256 index,
address account,
uint256 amount,
bytes32[] calldata merkleProof,
uint256 minAmountOut,
address to
) external {
_claim(index, account, amount, merkleProof);
IStrategyZaps(zaps).claimFromVaultAsCrv(amount, minAmountOut, to);
}
/// @notice Claim from distributor as cvxCRV
/// @param index - claimer index
/// @param account - claimer account
/// @param amount - claim amount
/// @param merkleProof - merkle proof for the claim
/// @param minAmountOut - min amount of cvxCRV expected
/// @param to - address to lock on behalf of
function claimFromDistributorAsCvxCrv(
uint256 index,
address account,
uint256 amount,
bytes32[] calldata merkleProof,
uint256 minAmountOut,
address to
) external {
_claim(index, account, amount, merkleProof);
IStrategyZaps(zaps).claimFromVaultAsCvxCrv(amount, minAmountOut, to);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "IERC20.sol";
import "Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;
interface IStrategyZaps {
function claimFromVaultAsUnderlying(
uint256 amount,
uint256 assetIndex,
uint256 minAmountOut,
address to
) external returns (uint256);
function claimFromVaultAsFxs(
uint256 amount,
uint256 minAmountOut,
address to
) external returns (uint256);
function claimFromVaultAsEth(
uint256 amount,
uint256 minAmountOut,
address to
) external returns (uint256);
function claimFromVaultViaUniV2EthPair(
uint256 amount,
uint256 minAmountOut,
address router,
address outputToken,
address to
) external;
function claimFromVaultAsUsdt(
uint256 amount,
uint256 minAmountOut,
address to
) external returns (uint256);
function claimFromVaultAsCvx(
uint256 amount,
uint256 minAmountOut,
address to,
bool lock
) external returns (uint256);
function claimFromVaultAsCvx(
uint256 amount,
uint256 minAmountOut,
address to
) external returns (uint256);
function claimFromVaultAsCrv(
uint256 amount,
uint256 minAmountOut,
address to
) external returns (uint256);
function claimFromVaultAsCvxCrv(
uint256 amount,
uint256 minAmountOut,
address to
) external returns (uint256);
function claimFromVaultAndStakeIn3PoolConvex(
uint256 amount,
uint256 minAmountOut,
address to
) external returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;
interface IGenericDistributor {
function vault() external view returns (address);
function merkleRoot() external view returns (bytes32);
function week() external view returns (uint32);
function frozen() external view returns (bool);
function isClaimed(uint256 index) external view returns (bool);
function setApprovals() external;
function claim(
uint256 index,
address account,
uint256 amount,
bytes32[] calldata merkleProof
) external;
function freeze() external;
function unfreeze() external;
function stake() external;
function updateMerkleRoot(bytes32 newMerkleRoot, bool unfreeze) external;
function updateDepositor(address newDepositor) external;
function updateAdmin(address newAdmin) external;
function updateVault(address newVault) external;
event DepositorUpdated(
address indexed oldDepositor,
address indexed newDepositor
);
event AdminUpdated(address indexed oldAdmin, address indexed newAdmin);
event VaultUpdated(address indexed oldVault, address indexed newVault);
event MerkleRootUpdated(bytes32 indexed merkleRoot, uint32 indexed week);
}