ERC-20
Overview
Max Total Supply
47,222.181382080767204426 sINV
Holders
76
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 18 Decimals)
Balance
153.940842259322953586 sINVValue
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
sINV
Compiler Version
v0.8.21+commit.d9974bed
Optimization Enabled:
Yes with 200 runs
Other Settings:
shanghai EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT License pragma solidity ^0.8.21; import "lib/solmate/src/tokens/ERC4626.sol"; interface IInvEscrow { function balance() external view returns (uint); function claimDBR() external; function claimable() external view returns (uint); } interface IMarket { function deposit(uint256 amount) external; function withdraw(uint256 amount) external; function dbr() external returns (address); function escrows(address user) external returns (address); } interface IERC20 { function transfer(address, uint) external returns (bool); function transferFrom(address, address, uint) external returns (bool); function balanceOf(address) external view returns (uint); } /** * @title sINV * @dev Auto-compounding ERC4626 wrapper for asset FiRM deposits utilizing xy=k auctions. * WARNING: While this vault is safe to be used as collateral in lending markets, it should not be allowed as a borrowable asset. * Any protocol in which sudden, large and atomic increases in the value of an asset may be a security risk should not integrate this vault. */ contract sINV is ERC4626{ struct RevenueData { uint96 periodRevenue; uint96 lastPeriodRevenue; uint64 lastBuyPeriod; } struct KData { uint192 targetK; uint64 lastKUpdate; } uint256 public constant MIN_ASSETS = 10**16; // 1 cent uint256 public constant MIN_SHARES = 10**18; uint256 public constant MAX_ASSETS = 10**32; // 100 trillion asset uint256 public constant period = 7 days; uint256 public depositLimit; IMarket public immutable invMarket; IInvEscrow public immutable invEscrow; ERC20 public immutable DBR; RevenueData public revenueData; KData public kData; address public gov; address public guardian; address public pendingGov; uint256 public minBuffer; uint256 public prevK; function periodRevenue() external view returns(uint256){return revenueData.periodRevenue;} function lastPeriodRevenue() external view returns(uint256){return revenueData.lastPeriodRevenue;} function lastBuyPeriod() external view returns(uint256){return revenueData.lastBuyPeriod;} function targetK() external view returns(uint256){return kData.targetK;} function lastKUpdate() external view returns(uint256){return kData.lastKUpdate;} error OnlyGov(); error OnlyPendingGov(); error OnlyGuardian(); error KTooLow(uint k, uint limit); error BelowMinShares(); error AboveDepositLimit(); error DepositLimitMustIncrease(); error InsufficientAssets(); error Invariant(); error UnauthorizedTokenWithdrawal(); /** * @dev Constructor for sINV contract. * WARNING: MIN_SHARES will always be unwithdrawable from the vault. Deployer should deposit enough to mint MIN_SHARES to avoid causing user grief. * @param _inv Address of the asset token. * @param _invMarket Address of the asset FiRM market. * @param _gov Address of the governance. * @param _K Initial value for the K variable used in calculations. */ constructor( address _inv, address _invMarket, address _gov, address _guardian, uint256 _depositLimit, uint256 _K ) ERC4626(ERC20(_inv), "Staked Inv", "sINV") { if(_K == 0) revert KTooLow(_K, 1); IMarket(_invMarket).deposit(0); //creates an escrow on behalf of the sINV contract invEscrow = IInvEscrow(IMarket(_invMarket).escrows(address(this))); invMarket = IMarket(_invMarket); DBR = ERC20(IMarket(_invMarket).dbr()); gov = _gov; guardian = _guardian; kData.targetK = uint192(_K); depositLimit = _depositLimit; prevK = _K; asset.approve(address(invMarket), type(uint).max); } modifier onlyGov() { if(msg.sender != gov) revert OnlyGov(); _; } modifier onlyPendingGov() { if(msg.sender != pendingGov) revert OnlyPendingGov(); _; } modifier onlyGuardian() { if(msg.sender != guardian) revert OnlyGuardian(); _; } /** * @dev Hook that is called after tokens are deposited into the contract. */ function afterDeposit(uint256, uint256) internal override { if(totalSupply < MIN_SHARES) revert BelowMinShares(); if(totalAssets() > depositLimit) revert AboveDepositLimit(); uint256 invBal = asset.balanceOf(address(this)); if(invBal > minBuffer){ invMarket.deposit(invBal - minBuffer); } } /** * @dev Hook that is called before tokens are withdrawn from the contract. * @param assets The amount of assets to withdraw. * @param shares The amount of shares to withdraw */ function beforeWithdraw(uint256 assets, uint256 shares) internal override { uint256 _totalAssets = totalAssets(); if(_totalAssets < assets + MIN_ASSETS) revert InsufficientAssets(); if(totalSupply < shares + MIN_SHARES) revert BelowMinShares(); uint256 invBal = asset.balanceOf(address(this)); if(assets > invBal) { uint256 withdrawAmount = assets - invBal + minBuffer; if(_totalAssets < withdrawAmount){ invMarket.withdraw(assets - invBal); } else { invMarket.withdraw(withdrawAmount); } } } /** * @dev Calculates the total assets controlled by the contract. * Period revenue is distributed linearly over the following week. * @return The total assets in the contract. */ function totalAssets() public view override returns (uint) { uint256 periodsSinceLastBuy = block.timestamp / period - revenueData.lastBuyPeriod; uint256 _lastPeriodRevenue = revenueData.lastPeriodRevenue; uint256 _periodRevenue = revenueData.periodRevenue; uint256 invBal = invEscrow.balance() + asset.balanceOf(address(this)); if(periodsSinceLastBuy > 1){ return invBal < MAX_ASSETS ? invBal : MAX_ASSETS; } else if(periodsSinceLastBuy == 1) { _lastPeriodRevenue = _periodRevenue; _periodRevenue = 0; } uint256 remainingLastRevenue = _lastPeriodRevenue * (period - block.timestamp % period) / period; uint256 lockedRevenue = remainingLastRevenue + _periodRevenue; uint256 actualAssets; if(invBal > lockedRevenue){ actualAssets = invBal - lockedRevenue; } return actualAssets < MAX_ASSETS ? actualAssets : MAX_ASSETS; } function updatePeriodRevenue(uint96 newRevenue) internal { uint256 currentPeriod = block.timestamp / period; uint256 periodsSinceLastBuy = currentPeriod - revenueData.lastBuyPeriod; if(periodsSinceLastBuy > 1){ revenueData.lastPeriodRevenue = 0; revenueData.periodRevenue = newRevenue; revenueData.lastBuyPeriod = uint64(currentPeriod); } else if(periodsSinceLastBuy == 1) { revenueData.lastPeriodRevenue = revenueData.periodRevenue; revenueData.periodRevenue = newRevenue; revenueData.lastBuyPeriod = uint64(currentPeriod); } else { revenueData.periodRevenue += newRevenue; } } /** * @dev Returns the current value of K, which is a weighted average between prevK and kData.targetK. * @return The current value of K. */ function getK() public view returns (uint) { uint256 timeElapsed = block.timestamp - kData.lastKUpdate; if(timeElapsed > period) { return kData.targetK; } uint256 prevWeight = period - timeElapsed; return (prevK * prevWeight + kData.targetK * timeElapsed) / period; } /** * @dev Calculates the asset reserve based on the current DBR reserve. * @return The calculated asset reserve. */ function getInvReserve() public view returns (uint) { return getK() / getDbrReserve(); } /** * @dev Calculates the asset reserve for a given DBR reserve. * @param DBRReserve The DBR reserve value. * @return The calculated asset reserve. */ function getInvReserve(uint256 DBRReserve) public view returns (uint) { return getK() / DBRReserve; } /** * @dev Returns the current DBR reserve as the sum of DBR balance and claimable DBR * @return The current DBR reserve. */ function getDbrReserve() public view returns (uint) { return DBR.balanceOf(address(this)) + invEscrow.claimable(); } /** * @dev Sets a new target K value. * @param _K The new target K value. */ function setTargetK(uint256 _K) external onlyGov { if(_K < getDbrReserve()) revert KTooLow(_K, getDbrReserve()); prevK = getK(); kData.targetK = uint192(_K); kData.lastKUpdate = uint64(block.timestamp); emit SetTargetK(_K); } /** * @notice Set the min buffer * @dev Min buffer is the buffer of INV held by the sINV contract, which can be withdrawn much more cheaply than if they were staked * @param _minBuffer The new min buffer */ function setMinBuffer(uint256 _minBuffer) external onlyGov { minBuffer = _minBuffer; emit SetMinBuffer(_minBuffer); } /** * @dev Allows users to buy DBR with asset. * WARNING: Never expose this directly to a UI as it's likely to cause a loss unless a transaction is executed immediately. * Instead use the sINVHelper function or custom smart contract code. * @param exactInvIn The exact amount of asset to spend. * @param exactDbrOut The exact amount of DBR to receive. * @param to The address that will receive the DBR. */ function buyDBR(uint256 exactInvIn, uint256 exactDbrOut, address to) external { require(exactInvIn <= type(uint96).max, "EXCEED UINT96"); uint256 DBRBalance = DBR.balanceOf(address(this)); if(exactDbrOut > DBRBalance){ invEscrow.claimDBR(); DBRBalance = DBR.balanceOf(address(this)); } else { DBRBalance += invEscrow.claimable(); } uint256 k = getK(); uint256 DBRReserve = DBRBalance - exactDbrOut; uint256 invReserve = k / DBRBalance + exactInvIn; if(invReserve * DBRReserve < k) revert Invariant(); updatePeriodRevenue(uint96(exactInvIn)); asset.transferFrom(msg.sender, address(this), exactInvIn); DBR.transfer(to, exactDbrOut); emit Buy(msg.sender, to, exactInvIn, exactDbrOut); } /** * @notice Sets a new depositLimit. Only callable by guardian. * @dev Deposit limit must always increase * @param _depositLimit The new deposit limit */ function setDepositLimit(uint _depositLimit) external onlyGuardian { depositLimit = _depositLimit; } /** * @notice Sets the guardian that can increase the deposit limit. Only callable by governance. * @param _guardian The new guardian. */ function setGuardian(address _guardian) external onlyGov { guardian = _guardian; } /** * @dev Sets a new pending governance address. * @param _gov The address of the new pending governance. */ function setPendingGov(address _gov) external onlyGov { pendingGov = _gov; } /** * @dev Allows the pending governance to accept its role. */ function acceptGov() external onlyPendingGov { gov = pendingGov; pendingGov = address(0); } /** * @dev Allows governance to sweep any ERC20 token from the contract. * @dev Excludes the ability to sweep DBR tokens. * @param token The address of the ERC20 token to sweep. * @param amount The amount of tokens to sweep. * @param to The recipient address of the swept tokens. */ function sweep(address token, uint256 amount, address to) public onlyGov { if(address(DBR) == token || address(asset) == token) revert UnauthorizedTokenWithdrawal(); IERC20(token).transfer(to, amount); } /** * @notice Allows anyone to reapprove inv spending for invMarket */ function reapprove() external { asset.approve(address(invMarket), type(uint).max); } event Buy(address indexed caller, address indexed to, uint256 exactInvIn, uint256 exactDbrOut); event SetTargetK(uint256 newTargetK); event SetMinBuffer(uint256 newMinBuffer); }
// SPDX-License-Identifier: AGPL-3.0-only pragma solidity >=0.8.0; import {ERC20} from "../tokens/ERC20.sol"; import {SafeTransferLib} from "../utils/SafeTransferLib.sol"; import {FixedPointMathLib} from "../utils/FixedPointMathLib.sol"; /// @notice Minimal ERC4626 tokenized Vault implementation. /// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC4626.sol) abstract contract ERC4626 is ERC20 { using SafeTransferLib for ERC20; using FixedPointMathLib for uint256; /*////////////////////////////////////////////////////////////// EVENTS //////////////////////////////////////////////////////////////*/ event Deposit(address indexed caller, address indexed owner, uint256 assets, uint256 shares); event Withdraw( address indexed caller, address indexed receiver, address indexed owner, uint256 assets, uint256 shares ); /*////////////////////////////////////////////////////////////// IMMUTABLES //////////////////////////////////////////////////////////////*/ ERC20 public immutable asset; constructor( ERC20 _asset, string memory _name, string memory _symbol ) ERC20(_name, _symbol, _asset.decimals()) { asset = _asset; } /*////////////////////////////////////////////////////////////// DEPOSIT/WITHDRAWAL LOGIC //////////////////////////////////////////////////////////////*/ function deposit(uint256 assets, address receiver) public virtual returns (uint256 shares) { // Check for rounding error since we round down in previewDeposit. require((shares = previewDeposit(assets)) != 0, "ZERO_SHARES"); // Need to transfer before minting or ERC777s could reenter. asset.safeTransferFrom(msg.sender, address(this), assets); _mint(receiver, shares); emit Deposit(msg.sender, receiver, assets, shares); afterDeposit(assets, shares); } function mint(uint256 shares, address receiver) public virtual returns (uint256 assets) { assets = previewMint(shares); // No need to check for rounding error, previewMint rounds up. // Need to transfer before minting or ERC777s could reenter. asset.safeTransferFrom(msg.sender, address(this), assets); _mint(receiver, shares); emit Deposit(msg.sender, receiver, assets, shares); afterDeposit(assets, shares); } function withdraw( uint256 assets, address receiver, address owner ) public virtual returns (uint256 shares) { shares = previewWithdraw(assets); // No need to check for rounding error, previewWithdraw rounds up. if (msg.sender != owner) { uint256 allowed = allowance[owner][msg.sender]; // Saves gas for limited approvals. if (allowed != type(uint256).max) allowance[owner][msg.sender] = allowed - shares; } beforeWithdraw(assets, shares); _burn(owner, shares); emit Withdraw(msg.sender, receiver, owner, assets, shares); asset.safeTransfer(receiver, assets); } function redeem( uint256 shares, address receiver, address owner ) public virtual returns (uint256 assets) { if (msg.sender != owner) { uint256 allowed = allowance[owner][msg.sender]; // Saves gas for limited approvals. if (allowed != type(uint256).max) allowance[owner][msg.sender] = allowed - shares; } // Check for rounding error since we round down in previewRedeem. require((assets = previewRedeem(shares)) != 0, "ZERO_ASSETS"); beforeWithdraw(assets, shares); _burn(owner, shares); emit Withdraw(msg.sender, receiver, owner, assets, shares); asset.safeTransfer(receiver, assets); } /*////////////////////////////////////////////////////////////// ACCOUNTING LOGIC //////////////////////////////////////////////////////////////*/ function totalAssets() public view virtual returns (uint256); function convertToShares(uint256 assets) public view virtual returns (uint256) { uint256 supply = totalSupply; // Saves an extra SLOAD if totalSupply is non-zero. return supply == 0 ? assets : assets.mulDivDown(supply, totalAssets()); } function convertToAssets(uint256 shares) public view virtual returns (uint256) { uint256 supply = totalSupply; // Saves an extra SLOAD if totalSupply is non-zero. return supply == 0 ? shares : shares.mulDivDown(totalAssets(), supply); } function previewDeposit(uint256 assets) public view virtual returns (uint256) { return convertToShares(assets); } function previewMint(uint256 shares) public view virtual returns (uint256) { uint256 supply = totalSupply; // Saves an extra SLOAD if totalSupply is non-zero. return supply == 0 ? shares : shares.mulDivUp(totalAssets(), supply); } function previewWithdraw(uint256 assets) public view virtual returns (uint256) { uint256 supply = totalSupply; // Saves an extra SLOAD if totalSupply is non-zero. return supply == 0 ? assets : assets.mulDivUp(supply, totalAssets()); } function previewRedeem(uint256 shares) public view virtual returns (uint256) { return convertToAssets(shares); } /*////////////////////////////////////////////////////////////// DEPOSIT/WITHDRAWAL LIMIT LOGIC //////////////////////////////////////////////////////////////*/ function maxDeposit(address) public view virtual returns (uint256) { return type(uint256).max; } function maxMint(address) public view virtual returns (uint256) { return type(uint256).max; } function maxWithdraw(address owner) public view virtual returns (uint256) { return convertToAssets(balanceOf[owner]); } function maxRedeem(address owner) public view virtual returns (uint256) { return balanceOf[owner]; } /*////////////////////////////////////////////////////////////// INTERNAL HOOKS LOGIC //////////////////////////////////////////////////////////////*/ function beforeWithdraw(uint256 assets, uint256 shares) internal virtual {} function afterDeposit(uint256 assets, uint256 shares) internal virtual {} }
// SPDX-License-Identifier: AGPL-3.0-only pragma solidity >=0.8.0; /// @notice Modern and gas efficient ERC20 + EIP-2612 implementation. /// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC20.sol) /// @author Modified from Uniswap (https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/UniswapV2ERC20.sol) /// @dev Do not manually set balances without updating totalSupply, as the sum of all user balances must not exceed it. abstract contract ERC20 { /*////////////////////////////////////////////////////////////// EVENTS //////////////////////////////////////////////////////////////*/ event Transfer(address indexed from, address indexed to, uint256 amount); event Approval(address indexed owner, address indexed spender, uint256 amount); /*////////////////////////////////////////////////////////////// METADATA STORAGE //////////////////////////////////////////////////////////////*/ string public name; string public symbol; uint8 public immutable decimals; /*////////////////////////////////////////////////////////////// ERC20 STORAGE //////////////////////////////////////////////////////////////*/ uint256 public totalSupply; mapping(address => uint256) public balanceOf; mapping(address => mapping(address => uint256)) public allowance; /*////////////////////////////////////////////////////////////// EIP-2612 STORAGE //////////////////////////////////////////////////////////////*/ uint256 internal immutable INITIAL_CHAIN_ID; bytes32 internal immutable INITIAL_DOMAIN_SEPARATOR; mapping(address => uint256) public nonces; /*////////////////////////////////////////////////////////////// CONSTRUCTOR //////////////////////////////////////////////////////////////*/ constructor( string memory _name, string memory _symbol, uint8 _decimals ) { name = _name; symbol = _symbol; decimals = _decimals; INITIAL_CHAIN_ID = block.chainid; INITIAL_DOMAIN_SEPARATOR = computeDomainSeparator(); } /*////////////////////////////////////////////////////////////// ERC20 LOGIC //////////////////////////////////////////////////////////////*/ function approve(address spender, uint256 amount) public virtual returns (bool) { allowance[msg.sender][spender] = amount; emit Approval(msg.sender, spender, amount); return true; } function transfer(address to, uint256 amount) public virtual returns (bool) { balanceOf[msg.sender] -= amount; // Cannot overflow because the sum of all user // balances can't exceed the max uint256 value. unchecked { balanceOf[to] += amount; } emit Transfer(msg.sender, to, amount); return true; } function transferFrom( address from, address to, uint256 amount ) public virtual returns (bool) { uint256 allowed = allowance[from][msg.sender]; // Saves gas for limited approvals. if (allowed != type(uint256).max) allowance[from][msg.sender] = allowed - amount; balanceOf[from] -= amount; // Cannot overflow because the sum of all user // balances can't exceed the max uint256 value. unchecked { balanceOf[to] += amount; } emit Transfer(from, to, amount); return true; } /*////////////////////////////////////////////////////////////// EIP-2612 LOGIC //////////////////////////////////////////////////////////////*/ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) public virtual { require(deadline >= block.timestamp, "PERMIT_DEADLINE_EXPIRED"); // Unchecked because the only math done is incrementing // the owner's nonce which cannot realistically overflow. unchecked { address recoveredAddress = ecrecover( keccak256( abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR(), keccak256( abi.encode( keccak256( "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)" ), owner, spender, value, nonces[owner]++, deadline ) ) ) ), v, r, s ); require(recoveredAddress != address(0) && recoveredAddress == owner, "INVALID_SIGNER"); allowance[recoveredAddress][spender] = value; } emit Approval(owner, spender, value); } function DOMAIN_SEPARATOR() public view virtual returns (bytes32) { return block.chainid == INITIAL_CHAIN_ID ? INITIAL_DOMAIN_SEPARATOR : computeDomainSeparator(); } function computeDomainSeparator() internal view virtual returns (bytes32) { return keccak256( abi.encode( keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"), keccak256(bytes(name)), keccak256("1"), block.chainid, address(this) ) ); } /*////////////////////////////////////////////////////////////// INTERNAL MINT/BURN LOGIC //////////////////////////////////////////////////////////////*/ function _mint(address to, uint256 amount) internal virtual { totalSupply += amount; // Cannot overflow because the sum of all user // balances can't exceed the max uint256 value. unchecked { balanceOf[to] += amount; } emit Transfer(address(0), to, amount); } function _burn(address from, uint256 amount) internal virtual { balanceOf[from] -= amount; // Cannot underflow because a user's balance // will never be larger than the total supply. unchecked { totalSupply -= amount; } emit Transfer(from, address(0), amount); } }
// SPDX-License-Identifier: AGPL-3.0-only pragma solidity >=0.8.0; import {ERC20} from "../tokens/ERC20.sol"; /// @notice Safe ETH and ERC20 transfer library that gracefully handles missing return values. /// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/SafeTransferLib.sol) /// @dev Use with caution! Some functions in this library knowingly create dirty bits at the destination of the free memory pointer. /// @dev Note that none of the functions in this library check that a token has code at all! That responsibility is delegated to the caller. library SafeTransferLib { /*////////////////////////////////////////////////////////////// ETH OPERATIONS //////////////////////////////////////////////////////////////*/ function safeTransferETH(address to, uint256 amount) internal { bool success; /// @solidity memory-safe-assembly assembly { // Transfer the ETH and store if it succeeded or not. success := call(gas(), to, amount, 0, 0, 0, 0) } require(success, "ETH_TRANSFER_FAILED"); } /*////////////////////////////////////////////////////////////// ERC20 OPERATIONS //////////////////////////////////////////////////////////////*/ function safeTransferFrom( ERC20 token, address from, address to, uint256 amount ) internal { bool success; /// @solidity memory-safe-assembly assembly { // Get a pointer to some free memory. let freeMemoryPointer := mload(0x40) // Write the abi-encoded calldata into memory, beginning with the function selector. mstore(freeMemoryPointer, 0x23b872dd00000000000000000000000000000000000000000000000000000000) mstore(add(freeMemoryPointer, 4), and(from, 0xffffffffffffffffffffffffffffffffffffffff)) // Append and mask the "from" argument. mstore(add(freeMemoryPointer, 36), and(to, 0xffffffffffffffffffffffffffffffffffffffff)) // Append and mask the "to" argument. mstore(add(freeMemoryPointer, 68), amount) // Append the "amount" argument. Masking not required as it's a full 32 byte type. success := and( // Set success to whether the call reverted, if not we check it either // returned exactly 1 (can't just be non-zero data), or had no return data. or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())), // We use 100 because the length of our calldata totals up like so: 4 + 32 * 3. // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space. // Counterintuitively, this call must be positioned second to the or() call in the // surrounding and() call or else returndatasize() will be zero during the computation. call(gas(), token, 0, freeMemoryPointer, 100, 0, 32) ) } require(success, "TRANSFER_FROM_FAILED"); } function safeTransfer( ERC20 token, address to, uint256 amount ) internal { bool success; /// @solidity memory-safe-assembly assembly { // Get a pointer to some free memory. let freeMemoryPointer := mload(0x40) // Write the abi-encoded calldata into memory, beginning with the function selector. mstore(freeMemoryPointer, 0xa9059cbb00000000000000000000000000000000000000000000000000000000) mstore(add(freeMemoryPointer, 4), and(to, 0xffffffffffffffffffffffffffffffffffffffff)) // Append and mask the "to" argument. mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument. Masking not required as it's a full 32 byte type. success := and( // Set success to whether the call reverted, if not we check it either // returned exactly 1 (can't just be non-zero data), or had no return data. or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())), // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2. // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space. // Counterintuitively, this call must be positioned second to the or() call in the // surrounding and() call or else returndatasize() will be zero during the computation. call(gas(), token, 0, freeMemoryPointer, 68, 0, 32) ) } require(success, "TRANSFER_FAILED"); } function safeApprove( ERC20 token, address to, uint256 amount ) internal { bool success; /// @solidity memory-safe-assembly assembly { // Get a pointer to some free memory. let freeMemoryPointer := mload(0x40) // Write the abi-encoded calldata into memory, beginning with the function selector. mstore(freeMemoryPointer, 0x095ea7b300000000000000000000000000000000000000000000000000000000) mstore(add(freeMemoryPointer, 4), and(to, 0xffffffffffffffffffffffffffffffffffffffff)) // Append and mask the "to" argument. mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument. Masking not required as it's a full 32 byte type. success := and( // Set success to whether the call reverted, if not we check it either // returned exactly 1 (can't just be non-zero data), or had no return data. or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())), // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2. // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space. // Counterintuitively, this call must be positioned second to the or() call in the // surrounding and() call or else returndatasize() will be zero during the computation. call(gas(), token, 0, freeMemoryPointer, 68, 0, 32) ) } require(success, "APPROVE_FAILED"); } }
// SPDX-License-Identifier: AGPL-3.0-only pragma solidity >=0.8.0; /// @notice Arithmetic library with operations for fixed-point numbers. /// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/FixedPointMathLib.sol) /// @author Inspired by USM (https://github.com/usmfum/USM/blob/master/contracts/WadMath.sol) library FixedPointMathLib { /*////////////////////////////////////////////////////////////// SIMPLIFIED FIXED POINT OPERATIONS //////////////////////////////////////////////////////////////*/ uint256 internal constant MAX_UINT256 = 2**256 - 1; uint256 internal constant WAD = 1e18; // The scalar of ETH and most ERC20s. function mulWadDown(uint256 x, uint256 y) internal pure returns (uint256) { return mulDivDown(x, y, WAD); // Equivalent to (x * y) / WAD rounded down. } function mulWadUp(uint256 x, uint256 y) internal pure returns (uint256) { return mulDivUp(x, y, WAD); // Equivalent to (x * y) / WAD rounded up. } function divWadDown(uint256 x, uint256 y) internal pure returns (uint256) { return mulDivDown(x, WAD, y); // Equivalent to (x * WAD) / y rounded down. } function divWadUp(uint256 x, uint256 y) internal pure returns (uint256) { return mulDivUp(x, WAD, y); // Equivalent to (x * WAD) / y rounded up. } /*////////////////////////////////////////////////////////////// LOW LEVEL FIXED POINT OPERATIONS //////////////////////////////////////////////////////////////*/ function mulDivDown( uint256 x, uint256 y, uint256 denominator ) internal pure returns (uint256 z) { /// @solidity memory-safe-assembly assembly { // Equivalent to require(denominator != 0 && (y == 0 || x <= type(uint256).max / y)) if iszero(mul(denominator, iszero(mul(y, gt(x, div(MAX_UINT256, y)))))) { revert(0, 0) } // Divide x * y by the denominator. z := div(mul(x, y), denominator) } } function mulDivUp( uint256 x, uint256 y, uint256 denominator ) internal pure returns (uint256 z) { /// @solidity memory-safe-assembly assembly { // Equivalent to require(denominator != 0 && (y == 0 || x <= type(uint256).max / y)) if iszero(mul(denominator, iszero(mul(y, gt(x, div(MAX_UINT256, y)))))) { revert(0, 0) } // If x * y modulo the denominator is strictly greater than 0, // 1 is added to round up the division of x * y by the denominator. z := add(gt(mod(mul(x, y), denominator), 0), div(mul(x, y), denominator)) } } function rpow( uint256 x, uint256 n, uint256 scalar ) internal pure returns (uint256 z) { /// @solidity memory-safe-assembly assembly { switch x case 0 { switch n case 0 { // 0 ** 0 = 1 z := scalar } default { // 0 ** n = 0 z := 0 } } default { switch mod(n, 2) case 0 { // If n is even, store scalar in z for now. z := scalar } default { // If n is odd, store x in z for now. z := x } // Shifting right by 1 is like dividing by 2. let half := shr(1, scalar) for { // Shift n right by 1 before looping to halve it. n := shr(1, n) } n { // Shift n right by 1 each iteration to halve it. n := shr(1, n) } { // Revert immediately if x ** 2 would overflow. // Equivalent to iszero(eq(div(xx, x), x)) here. if shr(128, x) { revert(0, 0) } // Store x squared. let xx := mul(x, x) // Round to the nearest number. let xxRound := add(xx, half) // Revert if xx + half overflowed. if lt(xxRound, xx) { revert(0, 0) } // Set x to scaled xxRound. x := div(xxRound, scalar) // If n is even: if mod(n, 2) { // Compute z * x. let zx := mul(z, x) // If z * x overflowed: if iszero(eq(div(zx, x), z)) { // Revert if x is non-zero. if iszero(iszero(x)) { revert(0, 0) } } // Round to the nearest number. let zxRound := add(zx, half) // Revert if zx + half overflowed. if lt(zxRound, zx) { revert(0, 0) } // Return properly scaled zxRound. z := div(zxRound, scalar) } } } } } /*////////////////////////////////////////////////////////////// GENERAL NUMBER UTILITIES //////////////////////////////////////////////////////////////*/ function sqrt(uint256 x) internal pure returns (uint256 z) { /// @solidity memory-safe-assembly assembly { let y := x // We start y at x, which will help us make our initial estimate. z := 181 // The "correct" value is 1, but this saves a multiplication later. // This segment is to get a reasonable initial estimate for the Babylonian method. With a bad // start, the correct # of bits increases ~linearly each iteration instead of ~quadratically. // We check y >= 2^(k + 8) but shift right by k bits // each branch to ensure that if x >= 256, then y >= 256. if iszero(lt(y, 0x10000000000000000000000000000000000)) { y := shr(128, y) z := shl(64, z) } if iszero(lt(y, 0x1000000000000000000)) { y := shr(64, y) z := shl(32, z) } if iszero(lt(y, 0x10000000000)) { y := shr(32, y) z := shl(16, z) } if iszero(lt(y, 0x1000000)) { y := shr(16, y) z := shl(8, z) } // Goal was to get z*z*y within a small factor of x. More iterations could // get y in a tighter range. Currently, we will have y in [256, 256*2^16). // We ensured y >= 256 so that the relative difference between y and y+1 is small. // That's not possible if x < 256 but we can just verify those cases exhaustively. // Now, z*z*y <= x < z*z*(y+1), and y <= 2^(16+8), and either y >= 256, or x < 256. // Correctness can be checked exhaustively for x < 256, so we assume y >= 256. // Then z*sqrt(y) is within sqrt(257)/sqrt(256) of sqrt(x), or about 20bps. // For s in the range [1/256, 256], the estimate f(s) = (181/1024) * (s+1) is in the range // (1/2.84 * sqrt(s), 2.84 * sqrt(s)), with largest error when s = 1 and when s = 256 or 1/256. // Since y is in [256, 256*2^16), let a = y/65536, so that a is in [1/256, 256). Then we can estimate // sqrt(y) using sqrt(65536) * 181/1024 * (a + 1) = 181/4 * (y + 65536)/65536 = 181 * (y + 65536)/2^18. // There is no overflow risk here since y < 2^136 after the first branch above. z := shr(18, mul(z, add(y, 65536))) // A mul() is saved from starting z at 181. // Given the worst case multiplicative error of 2.84 above, 7 iterations should be enough. z := shr(1, add(z, div(x, z))) z := shr(1, add(z, div(x, z))) z := shr(1, add(z, div(x, z))) z := shr(1, add(z, div(x, z))) z := shr(1, add(z, div(x, z))) z := shr(1, add(z, div(x, z))) z := shr(1, add(z, div(x, z))) // If x+1 is a perfect square, the Babylonian method cycles between // floor(sqrt(x)) and ceil(sqrt(x)). This statement ensures we return floor. // See: https://en.wikipedia.org/wiki/Integer_square_root#Using_only_integer_division // Since the ceil is rare, we save gas on the assignment and repeat division in the rare case. // If you don't care whether the floor or ceil square root is returned, you can remove this statement. z := sub(z, lt(div(x, z), z)) } } function unsafeMod(uint256 x, uint256 y) internal pure returns (uint256 z) { /// @solidity memory-safe-assembly assembly { // Mod x by y. Note this will return // 0 instead of reverting if y is zero. z := mod(x, y) } } function unsafeDiv(uint256 x, uint256 y) internal pure returns (uint256 r) { /// @solidity memory-safe-assembly assembly { // Divide x by y. Note this will return // 0 instead of reverting if y is zero. r := div(x, y) } } function unsafeDivUp(uint256 x, uint256 y) internal pure returns (uint256 z) { /// @solidity memory-safe-assembly assembly { // Add 1 to x * y if x % y > 0. Note this will // return 0 instead of reverting if y is zero. z := add(gt(mod(x, y), 0), div(x, y)) } } }
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Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000041d5d79431a913c4ae7d69a668ecdfe5ff9dfb68000000000000000000000000b516247596ca36bf32876199fbdcad6b3322330b000000000000000000000000926df14a23be491164dcf93f4c468a50ef659d5b0000000000000000000000004b6c63e6a94ef26e2df60b89372db2d8e211f1b700000000000000000000000000000000000000000000021e19e0c9bab240000000000000000000000000000000008e58532b0a48be0067ccbc8dd80000000000
-----Decoded View---------------
Arg [0] : _inv (address): 0x41D5D79431A913C4aE7d69a668ecdfE5fF9DFB68
Arg [1] : _invMarket (address): 0xb516247596Ca36bf32876199FBdCaD6B3322330B
Arg [2] : _gov (address): 0x926dF14a23BE491164dCF93f4c468A50ef659D5B
Arg [3] : _guardian (address): 0x4b6c63E6a94ef26E2dF60b89372db2d8e211F1B7
Arg [4] : _depositLimit (uint256): 10000000000000000000000
Arg [5] : _K (uint256): 12400000000000000000000000000000000000000000
-----Encoded View---------------
6 Constructor Arguments found :
Arg [0] : 00000000000000000000000041d5d79431a913c4ae7d69a668ecdfe5ff9dfb68
Arg [1] : 000000000000000000000000b516247596ca36bf32876199fbdcad6b3322330b
Arg [2] : 000000000000000000000000926df14a23be491164dcf93f4c468a50ef659d5b
Arg [3] : 0000000000000000000000004b6c63e6a94ef26e2df60b89372db2d8e211f1b7
Arg [4] : 00000000000000000000000000000000000000000000021e19e0c9bab2400000
Arg [5] : 00000000000000000000000000008e58532b0a48be0067ccbc8dd80000000000
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