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Initialize | 16520940 | 588 days ago | IN | 0 ETH | 0.00369553 |
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16520930 | 588 days ago | Contract Creation | 0 ETH |
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Minimal Proxy Contract for 0xcf93471a82241c2be469d83d960932721b098ffb
Contract Name:
EulerStakingPYTStrategy
Compiler Version
v0.8.10+commit.fc410830
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2022-12-27 */ // SPDX-License-Identifier: UNLICENSED pragma solidity ^0.8.10; // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20Upgradeable { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); } // OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/utils/SafeERC20.sol) // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-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. */ interface IERC20PermitUpgradeable { /** * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, * given ``owner``'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); } // OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol) /** * @dev Collection of functions related to the address type */ library AddressUpgradeable { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [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://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"); (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 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); } } } /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20Upgradeable { using AddressUpgradeable for address; function safeTransfer( IERC20Upgradeable token, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom( IERC20Upgradeable token, address from, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove( IERC20Upgradeable token, address spender, uint256 value ) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance( IERC20Upgradeable 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( IERC20Upgradeable 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)); } } function safePermit( IERC20PermitUpgradeable token, address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) internal { uint256 nonceBefore = token.nonces(owner); token.permit(owner, spender, value, deadline, v, r, s); uint256 nonceAfter = token.nonces(owner); require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed"); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20Upgradeable token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } interface ILendingProtocol { function mint() external returns (uint256); function redeem(address account) external returns (uint256); function nextSupplyRate(uint256 amount) external view returns (uint256); function getAPR() external view returns (uint256); function getPriceInToken() external view returns (uint256); function token() external view returns (address); function underlying() external view returns (address); function availableLiquidity() external view returns (uint256); } interface IIdleCDO { function AATranche() external view returns(address); function BBTranche() external view returns(address); function AAStaking() external view returns(address); function BBStaking() external view returns(address); function strategy() external view returns(address); function strategyToken() external view returns(address); function token() external view returns(address); function allowAAWithdraw() external view returns(bool); function allowBBWithdraw() external view returns(bool); function fee() external view returns(uint256); function getApr(address _tranche) external view returns(uint256); function getContractValue() external view returns(uint256); function trancheAPRSplitRatio() external view returns(uint256); function getCurrentAARatio() external view returns(uint256); function tranchePrice(address _tranche) external view returns(uint256); function virtualPrice(address _tranche) external view returns(uint256); function getIncentiveTokens() external view returns(address[] memory); function depositAA(uint256) external returns(uint256); function depositBB(uint256) external returns(uint256); function withdrawAA(uint256) external returns(uint256); function withdrawBB(uint256) external returns(uint256); } interface IIdleCDOStrategy { function getApr() external view returns(uint256); } // This contract should be deployed with a minimal proxy factory contract IdlePYT is ILendingProtocol { using SafeERC20Upgradeable for IERC20Upgradeable; address public idleToken; // protocol token (AA_tranche_token) address address public override token; // underlying token (token eg DAI) address address public override underlying; IERC20Upgradeable public tokenContract; IERC20Upgradeable public underlyingContract; // contract used for minting/burning tranche tokens IIdleCDO public idleCDO; // Used for calculating the nextRate uint256 internal constant AA_RATIO_LIM_UP = 99000; uint256 internal constant AA_RATIO_LIM_DOWN = 50000; uint256 internal constant FULL_ALLOC = 100000; uint256 internal constant ONE_TRANCHE = 1e18; bool public isSenior; // Errors error Initialized(); error Unauthorized(); /** * @param _token : tranche token address * @param _idleToken : idleToken address * @param _cdo : IdleCDO contract address for minting tranche tokens */ function initialize( address _token, address _idleToken, address _cdo ) external { if (address(token) != address(0)) { revert Initialized(); } idleCDO = IIdleCDO(_cdo); token = _token; isSenior = idleCDO.AATranche() == _token; tokenContract = IERC20Upgradeable(_token); underlying = idleCDO.token(); underlyingContract = IERC20Upgradeable(idleCDO.token()); idleToken = _idleToken; underlyingContract.safeApprove(_cdo, type(uint256).max); } /** * Throws if called by any account other than IdleToken contract. */ function _onlyIdle() internal view { if (msg.sender != idleToken) revert Unauthorized(); } /** * Calculate next supply rate for Compound, given an `_amount` supplied * * @notice this is used for off-chain calculations * @param _amount : new underlying amount supplied (eg DAI) * @return newAAApr : yearly net rate */ function nextSupplyRate(uint256 _amount) external view virtual returns (uint256 newAAApr) { IERC20Upgradeable _token = IERC20Upgradeable(token); IIdleCDO _idleCDO = idleCDO; uint256 _tvl = _idleCDO.getContractValue(); // we use tranchePrice instead of virtualPrice for more efficiency as interest accrued wont // affect too much TVL uint256 _tvlAA = _token.totalSupply() * _idleCDO.tranchePrice(address(_token)) / ONE_TRANCHE; uint256 _newTvlRatio = (_tvlAA + _amount) * FULL_ALLOC / (_tvl + _amount); uint256 _newAprRatio = _calcNewAPRSplit(_newTvlRatio); // we need to get the underlying strategy apr here to calculate the new apr for the tranche IIdleCDOStrategy innerStrategy = IIdleCDOStrategy(_idleCDO.strategy()); // TODO in new CDO strategies we should support a getApr(_amount) similar to nextSupplyRate // so to calculate also the impact on the underlying lending protocol used by the PYT. This // can be calculated off-chain in the meantime for the optimal rebalance amount newAAApr = innerStrategy.getApr() * _newAprRatio / _newTvlRatio; newAAApr = newAAApr * (FULL_ALLOC - idleCDO.fee()) / FULL_ALLOC; } /** * @return current price of tranche token */ function getPriceInToken() external view returns (uint256) { return idleCDO.virtualPrice(address(token)); } /** * @return _apr current apr */ function getAPR() external view returns (uint256 _apr) { _apr = idleCDO.getApr(address(token)); _apr = _apr * (FULL_ALLOC - idleCDO.fee()) / FULL_ALLOC; } /** * Gets all underlying tokens in this contract and mints cTokenLike Tokens * tokens are then transferred to msg.sender * NOTE: underlying tokens needs to be sent here before calling this * * @return minted : tranche tokens minted */ function mint() external virtual returns (uint256 minted) { _onlyIdle(); uint256 balance = underlyingContract.balanceOf(address(this)); if (balance != 0) { if (isSenior) { idleCDO.depositAA(balance); } else { idleCDO.depositBB(balance); } IERC20Upgradeable _token = tokenContract; minted = _token.balanceOf(address(this)); _token.safeTransfer(msg.sender, minted); } } /** * Gets all cTokenLike in this contract and redeems underlying tokens. * underlying tokens are then transferred to `_account` * NOTE: cTokenLike needs to be sent here before calling this * * @return tokens underlying tokens redeemd */ function redeem(address _account) external virtual returns (uint256 tokens) { _onlyIdle(); uint256 _bal = tokenContract.balanceOf(address(this)); if (isSenior) { idleCDO.withdrawAA(_bal); } else { idleCDO.withdrawBB(_bal); } IERC20Upgradeable _underlying = underlyingContract; tokens = _underlying.balanceOf(address(this)); _underlying.safeTransfer(_account, tokens); } /** * Get the underlying balance available on the lending protocol * * @return underlying tokens available */ function availableLiquidity() external virtual view returns (uint256) { return idleCDO.getContractValue(); } /** * Get the new apr split ratio in IdleCDO. Taken from here https://github.com/Idle-Labs/idle-tranches/blob/448c707a690e20bf2ef3e5a233fa97a329b34eb0/contracts/IdleCDO.sol#L454 * * @return _new new apr split ratio for IdleCDO */ function _calcNewAPRSplit(uint256 ratio) internal pure returns (uint256 _new){ uint256 aux; if (ratio >= AA_RATIO_LIM_UP) { aux = AA_RATIO_LIM_UP; } else if (ratio > AA_RATIO_LIM_DOWN) { aux = ratio; } else { aux = AA_RATIO_LIM_DOWN; } _new = aux * ratio / FULL_ALLOC; } } // This contract should be deployed with a minimal proxy factory contract EulerStakingPYTStrategy is IdlePYT { address internal constant EULER_MAIN = 0x27182842E098f60e3D576794A5bFFb0777E025d3; /** * Get the underlying balance available on the lending protocol * * @return underlying tokens available */ function availableLiquidity() external override view returns (uint256) { return underlyingContract.balanceOf(address(idleCDO)) + underlyingContract.balanceOf(EULER_MAIN); } }
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Multichain Portfolio | 26 Chains
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