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{
"language": "Solidity",
"sources": {
"contracts/adapters/yearn/YearnWrapper.sol": {
"content": "// SPDX-License-Identifier: AGPL-3.0\r\n\r\npragma solidity ^0.8.12;\r\n\r\nimport \"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol\";\r\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\r\nimport \"@openzeppelin/contracts/security/ReentrancyGuard.sol\";\r\nimport {ERC20} from \"@openzeppelin/contracts/token/ERC20/ERC20.sol\";\r\nimport {Math} from \"@openzeppelin/contracts/utils/math/Math.sol\";\r\n\r\nimport \"../../interfaces/adapters/yearn/IVaultWrapper.sol\";\r\nimport {VaultAPI, IYearnRegistry} from \"../../interfaces/adapters/yearn/VaultAPI.sol\";\r\nimport \"../../interfaces/IERC4626.sol\";\r\nimport {FixedPointMathLib} from \"../../lib/FixedPointMathLib.sol\";\r\n\r\n/**\r\n * @author RobAnon\r\n * @author 0xTraub\r\n * @author 0xTinder\r\n * @notice a contract for providing Yearn V2 contracts with an ERC-4626-compliant interface\r\n * Developed for Resonate.\r\n * @dev The initial deposit to this contract should be made immediately following deployment\r\n */\r\ncontract YearnWrapper is ERC20, IVaultWrapper, IERC4626, Ownable, ReentrancyGuard {\r\n\r\n using FixedPointMathLib for uint;\r\n using SafeERC20 for IERC20;\r\n\r\n /// NB: If this is deployed on non-Mainnet chains\r\n /// Then this address may be different\r\n IYearnRegistry public registry = IYearnRegistry(0x50c1a2eA0a861A967D9d0FFE2AE4012c2E053804);\r\n\r\n VaultAPI public yVault;\r\n\r\n address public immutable token;\r\n /// Decimals for native token\r\n uint8 public immutable _decimals;\r\n\r\n /// Necessary to prevent precision manipulation\r\n uint private constant MIN_DEPOSIT = 1E3;\r\n\r\n constructor(VaultAPI _vault)\r\n ERC20(\r\n string(abi.encodePacked(_vault.name(), \"-4646-Adapter\")),\r\n string(abi.encodePacked(_vault.symbol(), \"-4646\"))\r\n )\r\n {\r\n yVault = _vault;\r\n token = yVault.token();\r\n _decimals = uint8(_vault.decimals());\r\n }\r\n\r\n function vault() external view returns (address) {\r\n return address(yVault);\r\n }\r\n\r\n /// @dev Verifies that the yearn registry has \"_target\" recorded as the asset's latest vault\r\n function migrate(address _target) external onlyOwner returns (address) {\r\n // verify _target is a valid address\r\n if(registry.latestVault(token) != _target) {\r\n revert InvalidMigrationTarget();\r\n }\r\n\r\n uint assets = yVault.withdraw(type(uint).max);\r\n yVault = VaultAPI(_target);\r\n\r\n // Redeposit want into target vault\r\n yVault.deposit(assets);\r\n\r\n return _target;\r\n }\r\n\r\n // NB: this number will be different from this token's totalSupply\r\n function vaultTotalSupply() external view returns (uint256) {\r\n return yVault.totalSupply();\r\n }\r\n\r\n /*//////////////////////////////////////////////////////////////\r\n ERC20 compatibility\r\n //////////////////////////////////////////////////////////////*/\r\n\r\n function decimals() public view override(ERC20,IERC4626) returns (uint8) {\r\n return _decimals;\r\n }\r\n\r\n function asset() external view override returns (address) {\r\n return token;\r\n }\r\n\r\n /*//////////////////////////////////////////////////////////////\r\n DEPOSIT/WITHDRAWAL LOGIC\r\n //////////////////////////////////////////////////////////////*/\r\n\r\n function deposit(\r\n uint256 assets, \r\n address receiver\r\n ) public override nonReentrant returns (uint256 shares) {\r\n if(assets < MIN_DEPOSIT) {\r\n revert MinimumDepositNotMet();\r\n }\r\n\r\n (assets, shares) = _deposit(assets, receiver, msg.sender);\r\n\r\n emit Deposit(msg.sender, receiver, assets, shares);\r\n }\r\n\r\n function mint(\r\n uint256 shares, \r\n address receiver\r\n ) public override nonReentrant returns (uint256 assets) {\r\n // No need to check for rounding error, previewMint rounds up.\r\n assets = previewMint(shares); \r\n\r\n uint expectedShares = shares;\r\n (assets, shares) = _deposit(assets, receiver, msg.sender);\r\n\r\n if(assets < MIN_DEPOSIT) {\r\n revert MinimumDepositNotMet();\r\n }\r\n\r\n if(shares != expectedShares) {\r\n revert NotEnoughAvailableAssetsForAmount();\r\n }\r\n\r\n emit Deposit(msg.sender, receiver, assets, shares);\r\n }\r\n\r\n function withdraw(\r\n uint256 assets,\r\n address receiver,\r\n address owner\r\n ) public override nonReentrant returns (uint256 shares) {\r\n \r\n if(assets == 0) {\r\n revert NonZeroArgumentExpected();\r\n }\r\n\r\n (assets, shares) = _withdraw(\r\n assets,\r\n receiver,\r\n owner\r\n );\r\n\r\n emit Withdraw(msg.sender, receiver, owner, assets, shares);\r\n }\r\n\r\n function redeem(\r\n uint256 shares,\r\n address receiver,\r\n address owner\r\n ) public override nonReentrant returns (uint256 assets) {\r\n \r\n if(shares == 0) {\r\n revert NonZeroArgumentExpected();\r\n }\r\n\r\n (assets, shares) = _redeem(\r\n shares,\r\n receiver,\r\n owner\r\n );\r\n\r\n emit Withdraw(msg.sender, receiver, owner, assets, shares);\r\n }\r\n\r\n /*//////////////////////////////////////////////////////////////\r\n ACCOUNTING LOGIC\r\n //////////////////////////////////////////////////////////////*/\r\n\r\n function totalAssets() public view override returns (uint256) {\r\n return convertYearnSharesToAssets(yVault.balanceOf(address(this)));\r\n }\r\n\r\n function convertToShares(uint256 assets)\r\n public\r\n view\r\n override\r\n returns (uint256)\r\n {\r\n uint supply = totalSupply();\r\n uint localAssets = convertYearnSharesToAssets(yVault.balanceOf(address(this)));\r\n return supply == 0 ? assets : assets.mulDivDown(supply, localAssets); \r\n }\r\n\r\n function convertToAssets(uint256 shares)\r\n public\r\n view\r\n override\r\n returns (uint assets)\r\n {\r\n uint supply = totalSupply();\r\n uint localAssets = convertYearnSharesToAssets(yVault.balanceOf(address(this)));\r\n return supply == 0 ? shares : shares.mulDivDown(localAssets, supply);\r\n }\r\n\r\n function getFreeFunds() public view virtual returns (uint256) {\r\n uint256 lockedFundsRatio = (block.timestamp - yVault.lastReport()) * yVault.lockedProfitDegradation();\r\n uint256 _lockedProfit = yVault.lockedProfit();\r\n\r\n uint256 DEGRADATION_COEFFICIENT = 10 ** 18;\r\n uint256 lockedProfit = lockedFundsRatio < DEGRADATION_COEFFICIENT ? \r\n _lockedProfit - (lockedFundsRatio * _lockedProfit / DEGRADATION_COEFFICIENT)\r\n : 0; // hardcoded DEGRADATION_COEFFICIENT \r\n return yVault.totalAssets() - lockedProfit;\r\n }\r\n\r\n \r\n function previewDeposit(uint256 assets)\r\n public\r\n view\r\n override\r\n returns (uint256)\r\n {\r\n return convertToShares(assets);\r\n }\r\n\r\n function previewWithdraw(uint256 assets)\r\n public\r\n view\r\n override\r\n returns (uint256)\r\n {\r\n uint supply = totalSupply();\r\n uint localAssets = convertYearnSharesToAssets(yVault.balanceOf(address(this)));\r\n return supply == 0 ? assets : assets.mulDivUp(supply, localAssets); \r\n }\r\n\r\n function previewMint(uint256 shares)\r\n public\r\n view\r\n override\r\n returns (uint256)\r\n {\r\n uint supply = totalSupply();\r\n uint localAssets = convertYearnSharesToAssets(yVault.balanceOf(address(this)));\r\n return supply == 0 ? shares : shares.mulDivUp(localAssets, supply);\r\n }\r\n\r\n function previewRedeem(uint256 shares)\r\n public\r\n view\r\n override\r\n returns (uint256)\r\n {\r\n return convertToAssets(shares);\r\n }\r\n\r\n /*//////////////////////////////////////////////////////////////\r\n DEPOSIT/WITHDRAWAL LIMIT LOGIC\r\n //////////////////////////////////////////////////////////////*/\r\n\r\n function maxDeposit(address)\r\n public\r\n view\r\n override\r\n returns (uint256)\r\n {\r\n return yVault.availableDepositLimit();\r\n }\r\n\r\n function maxMint(address _account)\r\n external\r\n view\r\n override\r\n returns (uint256)\r\n {\r\n return maxDeposit(_account)/ yVault.pricePerShare();\r\n }\r\n\r\n function maxWithdraw(address owner)\r\n external\r\n view\r\n override\r\n returns (uint256)\r\n {\r\n return convertToAssets(this.balanceOf(owner));\r\n }\r\n\r\n function maxRedeem(address owner) external view override returns (uint256) {\r\n return this.balanceOf(owner);\r\n }\r\n\r\n function _deposit(\r\n uint256 amount,\r\n address receiver,\r\n address depositor\r\n ) internal returns (uint256 deposited, uint256 mintedShares) {\r\n VaultAPI _vault = yVault;\r\n IERC20 _token = IERC20(token);\r\n\r\n if (amount == type(uint256).max) {\r\n amount = Math.min(\r\n _token.balanceOf(depositor),\r\n _token.allowance(depositor, address(this))\r\n );\r\n }\r\n\r\n _token.safeTransferFrom(depositor, address(this), amount);\r\n\r\n\r\n _token.safeApprove(address(_vault), amount);\r\n\r\n uint256 beforeBal = _token.balanceOf(address(this));\r\n\r\n mintedShares = previewDeposit(amount);\r\n _vault.deposit(amount, address(this));\r\n\r\n uint256 afterBal = _token.balanceOf(address(this));\r\n deposited = beforeBal - afterBal;\r\n\r\n // afterDeposit custom logic\r\n _mint(receiver, mintedShares);\r\n }\r\n\r\n function _withdraw(\r\n uint256 amount,\r\n address receiver,\r\n address sender\r\n ) internal returns (uint256 assets, uint256 shares) {\r\n VaultAPI _vault = yVault;\r\n\r\n shares = previewWithdraw(amount); \r\n uint yearnShares = convertAssetsToYearnShares(amount);\r\n\r\n assets = _doWithdrawal(shares, yearnShares, sender, receiver, _vault);\r\n\r\n if(assets < amount) {\r\n revert NotEnoughAvailableSharesForAmount();\r\n }\r\n }\r\n\r\n function _redeem(\r\n uint256 shares, \r\n address receiver,\r\n address sender\r\n ) internal returns (uint256 assets, uint256 sharesBurnt) {\r\n VaultAPI _vault = yVault;\r\n uint yearnShares = convertSharesToYearnShares(shares);\r\n assets = _doWithdrawal(shares, yearnShares, sender, receiver, _vault); \r\n sharesBurnt = shares;\r\n }\r\n\r\n function _doWithdrawal(\r\n uint shares,\r\n uint yearnShares,\r\n address sender,\r\n address receiver,\r\n VaultAPI _vault\r\n ) private returns (uint assets) {\r\n if (sender != msg.sender) {\r\n uint currentAllowance = allowance(sender, msg.sender);\r\n if(currentAllowance < shares) {\r\n revert SpenderDoesNotHaveApprovalToBurnShares();\r\n }\r\n _approve(sender, msg.sender, currentAllowance - shares);\r\n }\r\n\r\n if (shares > balanceOf(sender)) {\r\n revert NotEnoughAvailableSharesForAmount();\r\n }\r\n\r\n if(yearnShares == 0 || shares == 0) {\r\n revert NoAvailableShares();\r\n }\r\n\r\n _burn(sender, shares);\r\n // withdraw from vault and get total used shares\r\n assets = _vault.withdraw(yearnShares, receiver, 0);\r\n }\r\n\r\n ///\r\n /// VIEW METHODS\r\n ///\r\n\r\n function convertAssetsToYearnShares(uint assets) internal view returns (uint yShares) {\r\n uint256 supply = yVault.totalSupply();\r\n return supply == 0 ? assets : assets.mulDivUp(supply, getFreeFunds());\r\n }\r\n\r\n function convertYearnSharesToAssets(uint yearnShares) internal view returns (uint assets) {\r\n uint supply = yVault.totalSupply();\r\n return supply == 0 ? yearnShares : yearnShares * getFreeFunds() / supply;\r\n }\r\n\r\n function convertSharesToYearnShares(uint shares) internal view returns (uint yShares) {\r\n uint supply = totalSupply(); \r\n return supply == 0 ? shares : shares.mulDivUp(yVault.balanceOf(address(this)), supply);\r\n }\r\n\r\n function allowance(address owner, address spender) public view virtual override(ERC20,IERC4626) returns (uint256) {\r\n return super.allowance(owner,spender);\r\n }\r\n\r\n function balanceOf(address account) public view virtual override(ERC20,IERC4626) returns (uint256) {\r\n return super.balanceOf(account);\r\n }\r\n\r\n function name() public view virtual override(ERC20,IERC4626) returns (string memory) {\r\n return super.name();\r\n }\r\n\r\n function symbol() public view virtual override(ERC20,IERC4626) returns (string memory) {\r\n return super.symbol();\r\n }\r\n\r\n function totalSupply() public view virtual override(ERC20,IERC4626) returns (uint256) {\r\n return super.totalSupply();\r\n }\r\n\r\n}"
},
"contracts/lib/FixedPointMathLib.sol": {
"content": "// SPDX-License-Identifier: AGPL-3.0-only\r\npragma solidity >=0.8.0;\r\n\r\n/// @notice Arithmetic library with operations for fixed-point numbers.\r\n/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/utils/FixedPointMathLib.sol)\r\n/// @author Inspired by USM (https://github.com/usmfum/USM/blob/master/contracts/WadMath.sol)\r\nlibrary FixedPointMathLib {\r\n /*///////////////////////////////////////////////////////////////\r\n SIMPLIFIED FIXED POINT OPERATIONS\r\n //////////////////////////////////////////////////////////////*/\r\n\r\n uint256 internal constant WAD = 1e18; // The scalar of ETH and most ERC20s.\r\n\r\n function mulWadDown(uint256 x, uint256 y) internal pure returns (uint256) {\r\n return mulDivDown(x, y, WAD); // Equivalent to (x * y) / WAD rounded down.\r\n }\r\n\r\n function mulWadUp(uint256 x, uint256 y) internal pure returns (uint256) {\r\n return mulDivUp(x, y, WAD); // Equivalent to (x * y) / WAD rounded up.\r\n }\r\n\r\n function divWadDown(uint256 x, uint256 y) internal pure returns (uint256) {\r\n return mulDivDown(x, WAD, y); // Equivalent to (x * WAD) / y rounded down.\r\n }\r\n\r\n function divWadUp(uint256 x, uint256 y) internal pure returns (uint256) {\r\n return mulDivUp(x, WAD, y); // Equivalent to (x * WAD) / y rounded up.\r\n }\r\n\r\n /*///////////////////////////////////////////////////////////////\r\n LOW LEVEL FIXED POINT OPERATIONS\r\n //////////////////////////////////////////////////////////////*/\r\n\r\n function mulDivDown(\r\n uint256 x,\r\n uint256 y,\r\n uint256 denominator\r\n ) internal pure returns (uint256 z) {\r\n assembly {\r\n // Store x * y in z for now.\r\n z := mul(x, y)\r\n\r\n // Equivalent to require(denominator != 0 && (x == 0 || (x * y) / x == y))\r\n if iszero(and(iszero(iszero(denominator)), or(iszero(x), eq(div(z, x), y)))) {\r\n revert(0, 0)\r\n }\r\n\r\n // Divide z by the denominator.\r\n z := div(z, denominator)\r\n }\r\n }\r\n\r\n function mulDivUp(\r\n uint256 x,\r\n uint256 y,\r\n uint256 denominator\r\n ) internal pure returns (uint256 z) {\r\n assembly {\r\n // Store x * y in z for now.\r\n z := mul(x, y)\r\n\r\n // Equivalent to require(denominator != 0 && (x == 0 || (x * y) / x == y))\r\n if iszero(and(iszero(iszero(denominator)), or(iszero(x), eq(div(z, x), y)))) {\r\n revert(0, 0)\r\n }\r\n\r\n // First, divide z - 1 by the denominator and add 1.\r\n // We allow z - 1 to underflow if z is 0, because we multiply the\r\n // end result by 0 if z is zero, ensuring we return 0 if z is zero.\r\n z := mul(iszero(iszero(z)), add(div(sub(z, 1), denominator), 1))\r\n }\r\n }\r\n\r\n function rpow(\r\n uint256 x,\r\n uint256 n,\r\n uint256 scalar\r\n ) internal pure returns (uint256 z) {\r\n assembly {\r\n switch x\r\n case 0 {\r\n switch n\r\n case 0 {\r\n // 0 ** 0 = 1\r\n z := scalar\r\n }\r\n default {\r\n // 0 ** n = 0\r\n z := 0\r\n }\r\n }\r\n default {\r\n switch mod(n, 2)\r\n case 0 {\r\n // If n is even, store scalar in z for now.\r\n z := scalar\r\n }\r\n default {\r\n // If n is odd, store x in z for now.\r\n z := x\r\n }\r\n\r\n // Shifting right by 1 is like dividing by 2.\r\n let half := shr(1, scalar)\r\n\r\n for {\r\n // Shift n right by 1 before looping to halve it.\r\n n := shr(1, n)\r\n } n {\r\n // Shift n right by 1 each iteration to halve it.\r\n n := shr(1, n)\r\n } {\r\n // Revert immediately if x ** 2 would overflow.\r\n // Equivalent to iszero(eq(div(xx, x), x)) here.\r\n if shr(128, x) {\r\n revert(0, 0)\r\n }\r\n\r\n // Store x squared.\r\n let xx := mul(x, x)\r\n\r\n // Round to the nearest number.\r\n let xxRound := add(xx, half)\r\n\r\n // Revert if xx + half overflowed.\r\n if lt(xxRound, xx) {\r\n revert(0, 0)\r\n }\r\n\r\n // Set x to scaled xxRound.\r\n x := div(xxRound, scalar)\r\n\r\n // If n is even:\r\n if mod(n, 2) {\r\n // Compute z * x.\r\n let zx := mul(z, x)\r\n\r\n // If z * x overflowed:\r\n if iszero(eq(div(zx, x), z)) {\r\n // Revert if x is non-zero.\r\n if iszero(iszero(x)) {\r\n revert(0, 0)\r\n }\r\n }\r\n\r\n // Round to the nearest number.\r\n let zxRound := add(zx, half)\r\n\r\n // Revert if zx + half overflowed.\r\n if lt(zxRound, zx) {\r\n revert(0, 0)\r\n }\r\n\r\n // Return properly scaled zxRound.\r\n z := div(zxRound, scalar)\r\n }\r\n }\r\n }\r\n }\r\n }\r\n\r\n /*///////////////////////////////////////////////////////////////\r\n GENERAL NUMBER UTILITIES\r\n //////////////////////////////////////////////////////////////*/\r\n\r\n function sqrt(uint256 x) internal pure returns (uint256 z) {\r\n assembly {\r\n // Start off with z at 1.\r\n z := 1\r\n\r\n // Used below to help find a nearby power of 2.\r\n let y := x\r\n\r\n // Find the lowest power of 2 that is at least sqrt(x).\r\n if iszero(lt(y, 0x100000000000000000000000000000000)) {\r\n y := shr(128, y) // Like dividing by 2 ** 128.\r\n z := shl(64, z) // Like multiplying by 2 ** 64.\r\n }\r\n if iszero(lt(y, 0x10000000000000000)) {\r\n y := shr(64, y) // Like dividing by 2 ** 64.\r\n z := shl(32, z) // Like multiplying by 2 ** 32.\r\n }\r\n if iszero(lt(y, 0x100000000)) {\r\n y := shr(32, y) // Like dividing by 2 ** 32.\r\n z := shl(16, z) // Like multiplying by 2 ** 16.\r\n }\r\n if iszero(lt(y, 0x10000)) {\r\n y := shr(16, y) // Like dividing by 2 ** 16.\r\n z := shl(8, z) // Like multiplying by 2 ** 8.\r\n }\r\n if iszero(lt(y, 0x100)) {\r\n y := shr(8, y) // Like dividing by 2 ** 8.\r\n z := shl(4, z) // Like multiplying by 2 ** 4.\r\n }\r\n if iszero(lt(y, 0x10)) {\r\n y := shr(4, y) // Like dividing by 2 ** 4.\r\n z := shl(2, z) // Like multiplying by 2 ** 2.\r\n }\r\n if iszero(lt(y, 0x8)) {\r\n // Equivalent to 2 ** z.\r\n z := shl(1, z)\r\n }\r\n\r\n // Shifting right by 1 is like dividing by 2.\r\n z := shr(1, add(z, div(x, z)))\r\n z := shr(1, add(z, div(x, z)))\r\n z := shr(1, add(z, div(x, z)))\r\n z := shr(1, add(z, div(x, z)))\r\n z := shr(1, add(z, div(x, z)))\r\n z := shr(1, add(z, div(x, z)))\r\n z := shr(1, add(z, div(x, z)))\r\n\r\n // Compute a rounded down version of z.\r\n let zRoundDown := div(x, z)\r\n\r\n // If zRoundDown is smaller, use it.\r\n if lt(zRoundDown, z) {\r\n z := zRoundDown\r\n }\r\n }\r\n }\r\n}"
},
"contracts/interfaces/IERC4626.sol": {
"content": "// SPDX-License-Identifier: MIT\r\npragma solidity >=0.8.0;\r\n\r\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\r\n\r\ninterface IERC4626 is IERC20 {\r\n\r\n\r\n /*///////////////////////////////////////////////////////////////\r\n EVENTS\r\n //////////////////////////////////////////////////////////////*/\r\n \r\n event Deposit(address indexed caller, address indexed owner, uint256 amountUnderlying, uint256 shares);\r\n\r\n event Withdraw(\r\n address indexed caller,\r\n address indexed receiver,\r\n address indexed owner,\r\n uint256 amountUnderlying,\r\n uint256 shares\r\n );\r\n\r\n /// Transactional Functions\r\n\r\n function deposit(uint amountUnderlying, address receiver) external returns (uint shares);\r\n\r\n function mint(uint shares, address receiver) external returns (uint amountUnderlying);\r\n\r\n function withdraw(uint amountUnderlying, address receiver, address owner) external returns (uint shares);\r\n\r\n function redeem(uint shares, address receiver, address owner) external returns (uint amountUnderlying);\r\n\r\n\r\n /// View Functions\r\n\r\n function asset() external view returns (address assetTokenAddress);\r\n\r\n // Total assets held within\r\n function totalAssets() external view returns (uint totalManagedAssets);\r\n\r\n function convertToShares(uint amountUnderlying) external view returns (uint shares);\r\n\r\n function convertToAssets(uint shares) external view returns (uint amountUnderlying);\r\n\r\n function maxDeposit(address receiver) external view returns (uint maxAssets);\r\n\r\n function previewDeposit(uint amountUnderlying) external view returns (uint shares);\r\n\r\n function maxMint(address receiver) external view returns (uint maxShares);\r\n\r\n function previewMint(uint shares) external view returns (uint amountUnderlying);\r\n\r\n function maxWithdraw(address owner) external view returns (uint maxAssets);\r\n\r\n function previewWithdraw(uint amountUnderlying) external view returns (uint shares);\r\n\r\n function maxRedeem(address owner) external view returns (uint maxShares);\r\n\r\n function previewRedeem(uint shares) external view returns (uint amountUnderlying);\r\n\r\n /// IERC20 View Methods\r\n\r\n /**\r\n * @dev Returns the amount of shares in existence.\r\n */\r\n function totalSupply() external view returns (uint256);\r\n\r\n /**\r\n * @dev Returns the amount of shares owned by `account`.\r\n */\r\n function balanceOf(address account) external view returns (uint256);\r\n\r\n /**\r\n * @dev Returns the remaining number of shares that `spender` will be\r\n * allowed to spend on behalf of `owner` through {transferFrom}. This is\r\n * zero by default.\r\n *\r\n * This value changes when {approve} or {transferFrom} are called.\r\n */\r\n function allowance(address owner, address spender) external view returns (uint256);\r\n\r\n /**\r\n * @dev Returns the name of the vault shares.\r\n */\r\n function name() external view returns (string memory);\r\n\r\n /**\r\n * @dev Returns the symbol of the vault shares.\r\n */\r\n function symbol() external view returns (string memory);\r\n\r\n /**\r\n * @dev Returns the decimals places of the vault shares.\r\n */\r\n function decimals() external view returns (uint8);\r\n\r\n \r\n}"
},
"contracts/interfaces/adapters/yearn/VaultAPI.sol": {
"content": "// SPDX-License-Identifier: GPL-3.0\r\n\r\npragma solidity >=0.8;\r\n\r\nimport \"../../IERC20.sol\";\r\n\r\nstruct StrategyParams {\r\n uint256 performanceFee;\r\n uint256 activation;\r\n uint256 debtRatio;\r\n uint256 minDebtPerHarvest;\r\n uint256 maxDebtPerHarvest;\r\n uint256 lastReport;\r\n uint256 totalDebt;\r\n uint256 totalGain;\r\n uint256 totalLoss;\r\n}\r\n\r\ninterface IYearnRegistry {\r\n function latestVault(address asset) external returns (address); \r\n}\r\n\r\ninterface VaultAPI is IERC20 {\r\n\r\n function name() external view returns (string calldata);\r\n\r\n function symbol() external view returns (string calldata);\r\n\r\n function decimals() external view returns (uint256);\r\n\r\n function apiVersion() external pure returns (string memory);\r\n\r\n function permit(\r\n address owner,\r\n address spender,\r\n uint256 amount,\r\n uint256 expiry,\r\n bytes calldata signature\r\n ) external returns (bool);\r\n\r\n // NOTE: Vyper produces multiple signatures for a given function with \"default\" args\r\n function deposit() external returns (uint256);\r\n\r\n function deposit(uint256 amount) external returns (uint256);\r\n\r\n function deposit(uint256 amount, address recipient) external returns (uint256);\r\n\r\n // NOTE: Vyper produces multiple signatures for a given function with \"default\" args\r\n function withdraw() external returns (uint256);\r\n\r\n function withdraw(uint256 maxShares) external returns (uint256);\r\n\r\n function withdraw(uint256 maxShares, address recipient) external returns (uint256);\r\n\r\n function withdraw(uint256 maxShares, address recipient, uint maxLoss) external returns (uint256);\r\n\r\n function token() external view returns (address);\r\n\r\n function strategies(address _strategy) external view returns (StrategyParams memory);\r\n\r\n function pricePerShare() external view returns (uint256);\r\n\r\n function totalAssets() external view returns (uint256);\r\n\r\n function depositLimit() external view returns (uint256);\r\n\r\n function maxAvailableShares() external view returns (uint256);\r\n\r\n function availableDepositLimit() external view returns (uint256);\r\n\r\n /**\r\n * View how much the Vault would increase this Strategy's borrow limit,\r\n * based on its present performance (since its last report). Can be used to\r\n * determine expectedReturn in your Strategy.\r\n */\r\n function creditAvailable() external view returns (uint256);\r\n\r\n /**\r\n * View how much the Vault would like to pull back from the Strategy,\r\n * based on its present performance (since its last report). Can be used to\r\n * determine expectedReturn in your Strategy.\r\n */\r\n function debtOutstanding() external view returns (uint256);\r\n\r\n /**\r\n * View how much the Vault expect this Strategy to return at the current\r\n * block, based on its present performance (since its last report). Can be\r\n * used to determine expectedReturn in your Strategy.\r\n */\r\n function expectedReturn() external view returns (uint256);\r\n\r\n /**\r\n * This is the main contact point where the Strategy interacts with the\r\n * Vault. It is critical that this call is handled as intended by the\r\n * Strategy. Therefore, this function will be called by BaseStrategy to\r\n * make sure the integration is correct.\r\n */\r\n function report(\r\n uint256 _gain,\r\n uint256 _loss,\r\n uint256 _debtPayment\r\n ) external returns (uint256);\r\n\r\n /**\r\n * This function should only be used in the scenario where the Strategy is\r\n * being retired but no migration of the positions are possible, or in the\r\n * extreme scenario that the Strategy needs to be put into \"Emergency Exit\"\r\n * mode in order for it to exit as quickly as possible. The latter scenario\r\n * could be for any reason that is considered \"critical\" that the Strategy\r\n * exits its position as fast as possible, such as a sudden change in\r\n * market conditions leading to losses, or an imminent failure in an\r\n * external dependency.\r\n */\r\n function revokeStrategy() external;\r\n\r\n /**\r\n * View the governance address of the Vault to assert privileged functions\r\n * can only be called by governance. The Strategy serves the Vault, so it\r\n * is subject to governance defined by the Vault.\r\n */\r\n function governance() external view returns (address);\r\n\r\n /**\r\n * View the management address of the Vault to assert privileged functions\r\n * can only be called by management. The Strategy serves the Vault, so it\r\n * is subject to management defined by the Vault.\r\n */\r\n function management() external view returns (address);\r\n\r\n /**\r\n * View the guardian address of the Vault to assert privileged functions\r\n * can only be called by guardian. The Strategy serves the Vault, so it\r\n * is subject to guardian defined by the Vault.\r\n */\r\n function guardian() external view returns (address);\r\n\r\n function lockedProfitDegradation() external view returns (uint256);\r\n function lockedProfitDegration() external view returns (uint256);\r\n function lastReport() external view returns (uint256);\r\n function lockedProfit() external view returns (uint256);\r\n function totalDebt() external view returns (uint256);\r\n\r\n}\r\n"
},
"contracts/interfaces/adapters/yearn/IVaultWrapper.sol": {
"content": "// SPDX-License-Identifier: AGPL-3.0-only\r\npragma solidity ^0.8.12;\r\n\r\ninterface IVaultWrapper {\r\n \r\n error NoAvailableShares();\r\n error NotEnoughAvailableSharesForAmount();\r\n error SpenderDoesNotHaveApprovalToBurnShares();\r\n error NotEnoughAvailableAssetsForAmount();\r\n error InvalidMigrationTarget();\r\n error MinimumDepositNotMet();\r\n error NonZeroArgumentExpected();\r\n\r\n function vault() external view returns (address);\r\n\r\n function vaultTotalSupply() external view returns (uint256);\r\n}"
},
"@openzeppelin/contracts/access/Ownable.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../utils/Context.sol\";\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract Ownable is Context {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n constructor() {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n _;\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions anymore. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby removing any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n}\n"
},
"@openzeppelin/contracts/security/ReentrancyGuard.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Contract module that helps prevent reentrant calls to a function.\n *\n * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier\n * available, which can be applied to functions to make sure there are no nested\n * (reentrant) calls to them.\n *\n * Note that because there is a single `nonReentrant` guard, functions marked as\n * `nonReentrant` may not call one another. This can be worked around by making\n * those functions `private`, and then adding `external` `nonReentrant` entry\n * points to them.\n *\n * TIP: If you would like to learn more about reentrancy and alternative ways\n * to protect against it, check out our blog post\n * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].\n */\nabstract contract ReentrancyGuard {\n // Booleans are more expensive than uint256 or any type that takes up a full\n // word because each write operation emits an extra SLOAD to first read the\n // slot's contents, replace the bits taken up by the boolean, and then write\n // back. This is the compiler's defense against contract upgrades and\n // pointer aliasing, and it cannot be disabled.\n\n // The values being non-zero value makes deployment a bit more expensive,\n // but in exchange the refund on every call to nonReentrant will be lower in\n // amount. Since refunds are capped to a percentage of the total\n // transaction's gas, it is best to keep them low in cases like this one, to\n // increase the likelihood of the full refund coming into effect.\n uint256 private constant _NOT_ENTERED = 1;\n uint256 private constant _ENTERED = 2;\n\n uint256 private _status;\n\n constructor() {\n _status = _NOT_ENTERED;\n }\n\n /**\n * @dev Prevents a contract from calling itself, directly or indirectly.\n * Calling a `nonReentrant` function from another `nonReentrant`\n * function is not supported. It is possible to prevent this from happening\n * by making the `nonReentrant` function external, and making it call a\n * `private` function that does the actual work.\n */\n modifier nonReentrant() {\n // On the first call to nonReentrant, _notEntered will be true\n require(_status != _ENTERED, \"ReentrancyGuard: reentrant call\");\n\n // Any calls to nonReentrant after this point will fail\n _status = _ENTERED;\n\n _;\n\n // By storing the original value once again, a refund is triggered (see\n // https://eips.ethereum.org/EIPS/eip-2200)\n _status = _NOT_ENTERED;\n }\n}\n"
},
"@openzeppelin/contracts/token/ERC20/ERC20.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/ERC20.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IERC20.sol\";\nimport \"./extensions/IERC20Metadata.sol\";\nimport \"../../utils/Context.sol\";\n\n/**\n * @dev Implementation of the {IERC20} interface.\n *\n * This implementation is agnostic to the way tokens are created. This means\n * that a supply mechanism has to be added in a derived contract using {_mint}.\n * For a generic mechanism see {ERC20PresetMinterPauser}.\n *\n * TIP: For a detailed writeup see our guide\n * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How\n * to implement supply mechanisms].\n *\n * We have followed general OpenZeppelin Contracts guidelines: functions revert\n * instead returning `false` on failure. This behavior is nonetheless\n * conventional and does not conflict with the expectations of ERC20\n * applications.\n *\n * Additionally, an {Approval} event is emitted on calls to {transferFrom}.\n * This allows applications to reconstruct the allowance for all accounts just\n * by listening to said events. Other implementations of the EIP may not emit\n * these events, as it isn't required by the specification.\n *\n * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}\n * functions have been added to mitigate the well-known issues around setting\n * allowances. See {IERC20-approve}.\n */\ncontract ERC20 is Context, IERC20, IERC20Metadata {\n mapping(address => uint256) private _balances;\n\n mapping(address => mapping(address => uint256)) private _allowances;\n\n uint256 private _totalSupply;\n\n string private _name;\n string private _symbol;\n\n /**\n * @dev Sets the values for {name} and {symbol}.\n *\n * The default value of {decimals} is 18. To select a different value for\n * {decimals} you should overload it.\n *\n * All two of these values are immutable: they can only be set once during\n * construction.\n */\n constructor(string memory name_, string memory symbol_) {\n _name = name_;\n _symbol = symbol_;\n }\n\n /**\n * @dev Returns the name of the token.\n */\n function name() public view virtual override returns (string memory) {\n return _name;\n }\n\n /**\n * @dev Returns the symbol of the token, usually a shorter version of the\n * name.\n */\n function symbol() public view virtual override returns (string memory) {\n return _symbol;\n }\n\n /**\n * @dev Returns the number of decimals used to get its user representation.\n * For example, if `decimals` equals `2`, a balance of `505` tokens should\n * be displayed to a user as `5.05` (`505 / 10 ** 2`).\n *\n * Tokens usually opt for a value of 18, imitating the relationship between\n * Ether and Wei. This is the value {ERC20} uses, unless this function is\n * overridden;\n *\n * NOTE: This information is only used for _display_ purposes: it in\n * no way affects any of the arithmetic of the contract, including\n * {IERC20-balanceOf} and {IERC20-transfer}.\n */\n function decimals() public view virtual override returns (uint8) {\n return 18;\n }\n\n /**\n * @dev See {IERC20-totalSupply}.\n */\n function totalSupply() public view virtual override returns (uint256) {\n return _totalSupply;\n }\n\n /**\n * @dev See {IERC20-balanceOf}.\n */\n function balanceOf(address account) public view virtual override returns (uint256) {\n return _balances[account];\n }\n\n /**\n * @dev See {IERC20-transfer}.\n *\n * Requirements:\n *\n * - `to` cannot be the zero address.\n * - the caller must have a balance of at least `amount`.\n */\n function transfer(address to, uint256 amount) public virtual override returns (bool) {\n address owner = _msgSender();\n _transfer(owner, to, amount);\n return true;\n }\n\n /**\n * @dev See {IERC20-allowance}.\n */\n function allowance(address owner, address spender) public view virtual override returns (uint256) {\n return _allowances[owner][spender];\n }\n\n /**\n * @dev See {IERC20-approve}.\n *\n * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on\n * `transferFrom`. This is semantically equivalent to an infinite approval.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n */\n function approve(address spender, uint256 amount) public virtual override returns (bool) {\n address owner = _msgSender();\n _approve(owner, spender, amount);\n return true;\n }\n\n /**\n * @dev See {IERC20-transferFrom}.\n *\n * Emits an {Approval} event indicating the updated allowance. This is not\n * required by the EIP. See the note at the beginning of {ERC20}.\n *\n * NOTE: Does not update the allowance if the current allowance\n * is the maximum `uint256`.\n *\n * Requirements:\n *\n * - `from` and `to` cannot be the zero address.\n * - `from` must have a balance of at least `amount`.\n * - the caller must have allowance for ``from``'s tokens of at least\n * `amount`.\n */\n function transferFrom(\n address from,\n address to,\n uint256 amount\n ) public virtual override returns (bool) {\n address spender = _msgSender();\n _spendAllowance(from, spender, amount);\n _transfer(from, to, amount);\n return true;\n }\n\n /**\n * @dev Atomically increases the allowance granted to `spender` by the caller.\n *\n * This is an alternative to {approve} that can be used as a mitigation for\n * problems described in {IERC20-approve}.\n *\n * Emits an {Approval} event indicating the updated allowance.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n */\n function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {\n address owner = _msgSender();\n _approve(owner, spender, allowance(owner, spender) + addedValue);\n return true;\n }\n\n /**\n * @dev Atomically decreases the allowance granted to `spender` by the caller.\n *\n * This is an alternative to {approve} that can be used as a mitigation for\n * problems described in {IERC20-approve}.\n *\n * Emits an {Approval} event indicating the updated allowance.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n * - `spender` must have allowance for the caller of at least\n * `subtractedValue`.\n */\n function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {\n address owner = _msgSender();\n uint256 currentAllowance = allowance(owner, spender);\n require(currentAllowance >= subtractedValue, \"ERC20: decreased allowance below zero\");\n unchecked {\n _approve(owner, spender, currentAllowance - subtractedValue);\n }\n\n return true;\n }\n\n /**\n * @dev Moves `amount` of tokens from `sender` to `recipient`.\n *\n * This internal function is equivalent to {transfer}, and can be used to\n * e.g. implement automatic token fees, slashing mechanisms, etc.\n *\n * Emits a {Transfer} event.\n *\n * Requirements:\n *\n * - `from` cannot be the zero address.\n * - `to` cannot be the zero address.\n * - `from` must have a balance of at least `amount`.\n */\n function _transfer(\n address from,\n address to,\n uint256 amount\n ) internal virtual {\n require(from != address(0), \"ERC20: transfer from the zero address\");\n require(to != address(0), \"ERC20: transfer to the zero address\");\n\n _beforeTokenTransfer(from, to, amount);\n\n uint256 fromBalance = _balances[from];\n require(fromBalance >= amount, \"ERC20: transfer amount exceeds balance\");\n unchecked {\n _balances[from] = fromBalance - amount;\n }\n _balances[to] += amount;\n\n emit Transfer(from, to, amount);\n\n _afterTokenTransfer(from, to, amount);\n }\n\n /** @dev Creates `amount` tokens and assigns them to `account`, increasing\n * the total supply.\n *\n * Emits a {Transfer} event with `from` set to the zero address.\n *\n * Requirements:\n *\n * - `account` cannot be the zero address.\n */\n function _mint(address account, uint256 amount) internal virtual {\n require(account != address(0), \"ERC20: mint to the zero address\");\n\n _beforeTokenTransfer(address(0), account, amount);\n\n _totalSupply += amount;\n _balances[account] += amount;\n emit Transfer(address(0), account, amount);\n\n _afterTokenTransfer(address(0), account, amount);\n }\n\n /**\n * @dev Destroys `amount` tokens from `account`, reducing the\n * total supply.\n *\n * Emits a {Transfer} event with `to` set to the zero address.\n *\n * Requirements:\n *\n * - `account` cannot be the zero address.\n * - `account` must have at least `amount` tokens.\n */\n function _burn(address account, uint256 amount) internal virtual {\n require(account != address(0), \"ERC20: burn from the zero address\");\n\n _beforeTokenTransfer(account, address(0), amount);\n\n uint256 accountBalance = _balances[account];\n require(accountBalance >= amount, \"ERC20: burn amount exceeds balance\");\n unchecked {\n _balances[account] = accountBalance - amount;\n }\n _totalSupply -= amount;\n\n emit Transfer(account, address(0), amount);\n\n _afterTokenTransfer(account, address(0), amount);\n }\n\n /**\n * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.\n *\n * This internal function is equivalent to `approve`, and can be used to\n * e.g. set automatic allowances for certain subsystems, etc.\n *\n * Emits an {Approval} event.\n *\n * Requirements:\n *\n * - `owner` cannot be the zero address.\n * - `spender` cannot be the zero address.\n */\n function _approve(\n address owner,\n address spender,\n uint256 amount\n ) internal virtual {\n require(owner != address(0), \"ERC20: approve from the zero address\");\n require(spender != address(0), \"ERC20: approve to the zero address\");\n\n _allowances[owner][spender] = amount;\n emit Approval(owner, spender, amount);\n }\n\n /**\n * @dev Updates `owner` s allowance for `spender` based on spent `amount`.\n *\n * Does not update the allowance amount in case of infinite allowance.\n * Revert if not enough allowance is available.\n *\n * Might emit an {Approval} event.\n */\n function _spendAllowance(\n address owner,\n address spender,\n uint256 amount\n ) internal virtual {\n uint256 currentAllowance = allowance(owner, spender);\n if (currentAllowance != type(uint256).max) {\n require(currentAllowance >= amount, \"ERC20: insufficient allowance\");\n unchecked {\n _approve(owner, spender, currentAllowance - amount);\n }\n }\n }\n\n /**\n * @dev Hook that is called before any transfer of tokens. This includes\n * minting and burning.\n *\n * Calling conditions:\n *\n * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\n * will be transferred to `to`.\n * - when `from` is zero, `amount` tokens will be minted for `to`.\n * - when `to` is zero, `amount` of ``from``'s tokens will be burned.\n * - `from` and `to` are never both zero.\n *\n * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].\n */\n function _beforeTokenTransfer(\n address from,\n address to,\n uint256 amount\n ) internal virtual {}\n\n /**\n * @dev Hook that is called after any transfer of tokens. This includes\n * minting and burning.\n *\n * Calling conditions:\n *\n * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\n * has been transferred to `to`.\n * - when `from` is zero, `amount` tokens have been minted for `to`.\n * - when `to` is zero, `amount` of ``from``'s tokens have been burned.\n * - `from` and `to` are never both zero.\n *\n * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].\n */\n function _afterTokenTransfer(\n address from,\n address to,\n uint256 amount\n ) internal virtual {}\n}\n"
},
"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20.sol\";\nimport \"../../../utils/Address.sol\";\n\n/**\n * @title SafeERC20\n * @dev Wrappers around ERC20 operations that throw on failure (when the token\n * contract returns false). Tokens that return no value (and instead revert or\n * throw on failure) are also supported, non-reverting calls are assumed to be\n * successful.\n * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,\n * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.\n */\nlibrary SafeERC20 {\n using Address for address;\n\n function safeTransfer(\n IERC20 token,\n address to,\n uint256 value\n ) internal {\n _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));\n }\n\n function safeTransferFrom(\n IERC20 token,\n address from,\n address to,\n uint256 value\n ) internal {\n _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));\n }\n\n /**\n * @dev Deprecated. This function has issues similar to the ones found in\n * {IERC20-approve}, and its usage is discouraged.\n *\n * Whenever possible, use {safeIncreaseAllowance} and\n * {safeDecreaseAllowance} instead.\n */\n function safeApprove(\n IERC20 token,\n address spender,\n uint256 value\n ) internal {\n // safeApprove should only be called when setting an initial allowance,\n // or when resetting it to zero. To increase and decrease it, use\n // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'\n require(\n (value == 0) || (token.allowance(address(this), spender) == 0),\n \"SafeERC20: approve from non-zero to non-zero allowance\"\n );\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));\n }\n\n function safeIncreaseAllowance(\n IERC20 token,\n address spender,\n uint256 value\n ) internal {\n uint256 newAllowance = token.allowance(address(this), spender) + value;\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n }\n\n function safeDecreaseAllowance(\n IERC20 token,\n address spender,\n uint256 value\n ) internal {\n unchecked {\n uint256 oldAllowance = token.allowance(address(this), spender);\n require(oldAllowance >= value, \"SafeERC20: decreased allowance below zero\");\n uint256 newAllowance = oldAllowance - value;\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n }\n }\n\n /**\n * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\n * on the return value: the return value is optional (but if data is returned, it must not be false).\n * @param token The token targeted by the call.\n * @param data The call data (encoded using abi.encode or one of its variants).\n */\n function _callOptionalReturn(IERC20 token, bytes memory data) private {\n // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since\n // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that\n // the target address contains contract code and also asserts for success in the low-level call.\n\n bytes memory returndata = address(token).functionCall(data, \"SafeERC20: low-level call failed\");\n if (returndata.length > 0) {\n // Return data is optional\n require(abi.decode(returndata, (bool)), \"SafeERC20: ERC20 operation did not succeed\");\n }\n }\n}\n"
},
"@openzeppelin/contracts/utils/math/Math.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/math/Math.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Standard math utilities missing in the Solidity language.\n */\nlibrary Math {\n /**\n * @dev Returns the largest of two numbers.\n */\n function max(uint256 a, uint256 b) internal pure returns (uint256) {\n return a >= b ? a : b;\n }\n\n /**\n * @dev Returns the smallest of two numbers.\n */\n function min(uint256 a, uint256 b) internal pure returns (uint256) {\n return a < b ? a : b;\n }\n\n /**\n * @dev Returns the average of two numbers. The result is rounded towards\n * zero.\n */\n function average(uint256 a, uint256 b) internal pure returns (uint256) {\n // (a + b) / 2 can overflow.\n return (a & b) + (a ^ b) / 2;\n }\n\n /**\n * @dev Returns the ceiling of the division of two numbers.\n *\n * This differs from standard division with `/` in that it rounds up instead\n * of rounding down.\n */\n function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {\n // (a + b - 1) / b can overflow on addition, so we distribute.\n return a / b + (a % b == 0 ? 0 : 1);\n }\n}\n"
},
"@openzeppelin/contracts/token/ERC20/IERC20.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n /**\n * @dev Emitted when `value` tokens are moved from one account (`from`) to\n * another (`to`).\n *\n * Note that `value` may be zero.\n */\n event Transfer(address indexed from, address indexed to, uint256 value);\n\n /**\n * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n * a call to {approve}. `value` is the new allowance.\n */\n event Approval(address indexed owner, address indexed spender, uint256 value);\n\n /**\n * @dev Returns the amount of tokens in existence.\n */\n function totalSupply() external view returns (uint256);\n\n /**\n * @dev Returns the amount of tokens owned by `account`.\n */\n function balanceOf(address account) external view returns (uint256);\n\n /**\n * @dev Moves `amount` tokens from the caller's account to `to`.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transfer(address to, uint256 amount) external returns (bool);\n\n /**\n * @dev Returns the remaining number of tokens that `spender` will be\n * allowed to spend on behalf of `owner` through {transferFrom}. This is\n * zero by default.\n *\n * This value changes when {approve} or {transferFrom} are called.\n */\n function allowance(address owner, address spender) external view returns (uint256);\n\n /**\n * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * IMPORTANT: Beware that changing an allowance with this method brings the risk\n * that someone may use both the old and the new allowance by unfortunate\n * transaction ordering. One possible solution to mitigate this race\n * condition is to first reduce the spender's allowance to 0 and set the\n * desired value afterwards:\n * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n *\n * Emits an {Approval} event.\n */\n function approve(address spender, uint256 amount) external returns (bool);\n\n /**\n * @dev Moves `amount` tokens from `from` to `to` using the\n * allowance mechanism. `amount` is then deducted from the caller's\n * allowance.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transferFrom(\n address from,\n address to,\n uint256 amount\n ) external returns (bool);\n}\n"
},
"contracts/interfaces/IERC20.sol": {
"content": "// SPDX-License-Identifier: MIT\r\n// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\n/**\r\n * @dev Interface of the ERC20 standard as defined in the EIP.\r\n */\r\ninterface IERC20 {\r\n /**\r\n * @dev Emitted when `value` tokens are moved from one account (`from`) to\r\n * another (`to`).\r\n *\r\n * Note that `value` may be zero.\r\n */\r\n event Transfer(address indexed from, address indexed to, uint256 value);\r\n\r\n /**\r\n * @dev Emitted when the allowance of a `spender` for an `owner` is set by\r\n * a call to {approve}. `value` is the new allowance.\r\n */\r\n event Approval(address indexed owner, address indexed spender, uint256 value);\r\n\r\n /**\r\n * @dev Returns the amount of tokens in existence.\r\n */\r\n function totalSupply() external view returns (uint256);\r\n\r\n /**\r\n * @dev Returns the amount of tokens owned by `account`.\r\n */\r\n function balanceOf(address account) external view returns (uint256);\r\n\r\n /**\r\n * @dev Moves `amount` tokens from the caller's account to `to`.\r\n *\r\n * Returns a boolean value indicating whether the operation succeeded.\r\n *\r\n * Emits a {Transfer} event.\r\n */\r\n function transfer(address to, uint256 amount) external returns (bool);\r\n\r\n /**\r\n * @dev Returns the remaining number of tokens that `spender` will be\r\n * allowed to spend on behalf of `owner` through {transferFrom}. This is\r\n * zero by default.\r\n *\r\n * This value changes when {approve} or {transferFrom} are called.\r\n */\r\n function allowance(address owner, address spender) external view returns (uint256);\r\n\r\n /**\r\n * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\r\n *\r\n * Returns a boolean value indicating whether the operation succeeded.\r\n *\r\n * IMPORTANT: Beware that changing an allowance with this method brings the risk\r\n * that someone may use both the old and the new allowance by unfortunate\r\n * transaction ordering. One possible solution to mitigate this race\r\n * condition is to first reduce the spender's allowance to 0 and set the\r\n * desired value afterwards:\r\n * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\r\n *\r\n * Emits an {Approval} event.\r\n */\r\n function approve(address spender, uint256 amount) external returns (bool);\r\n\r\n /**\r\n * @dev Moves `amount` tokens from `from` to `to` using the\r\n * allowance mechanism. `amount` is then deducted from the caller's\r\n * allowance.\r\n *\r\n * Returns a boolean value indicating whether the operation succeeded.\r\n *\r\n * Emits a {Transfer} event.\r\n */\r\n function transferFrom(\r\n address from,\r\n address to,\r\n uint256 amount\r\n ) external returns (bool);\r\n}"
},
"@openzeppelin/contracts/utils/Context.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract Context {\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n}\n"
},
"@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20.sol\";\n\n/**\n * @dev Interface for the optional metadata functions from the ERC20 standard.\n *\n * _Available since v4.1._\n */\ninterface IERC20Metadata is IERC20 {\n /**\n * @dev Returns the name of the token.\n */\n function name() external view returns (string memory);\n\n /**\n * @dev Returns the symbol of the token.\n */\n function symbol() external view returns (string memory);\n\n /**\n * @dev Returns the decimals places of the token.\n */\n function decimals() external view returns (uint8);\n}\n"
},
"@openzeppelin/contracts/utils/Address.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)\n\npragma solidity ^0.8.1;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length > 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance >= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCall(target, data, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance >= value, \"Address: insufficient balance for call\");\n require(isContract(target), \"Address: call to non-contract\");\n\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n require(isContract(target), \"Address: static call to non-contract\");\n\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(isContract(target), \"Address: delegate call to non-contract\");\n\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n // Look for revert reason and bubble it up if present\n if (returndata.length > 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n }\n}\n"
}
},
"settings": {
"metadata": {
"bytecodeHash": "none",
"useLiteralContent": true
},
"optimizer": {
"enabled": true,
"runs": 100
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
},
"libraries": {}
}
} |