ERC-20
Overview
Max Total Supply
90,072,845.534413016597561641 svXAI
Holders
335
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 18 Decimals)
Balance
405.57338200679440532 svXAIValue
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
SideShiftVault
Compiler Version
v0.8.4+commit.c7e474f2
Optimization Enabled:
No with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: AGPL-3.0-only pragma solidity >=0.8.0; import {SafeCastLib} from '@rari-capital/solmate/src/utils/SafeCastLib.sol'; import {SafeTransferLib} from '@rari-capital/solmate/src/utils/SafeTransferLib.sol'; import {FixedPointMathLib} from '@rari-capital/solmate/src/utils/FixedPointMathLib.sol'; import {ERC4626} from '@rari-capital/solmate/src/mixins/ERC4626.sol'; import {ERC20} from '@rari-capital/solmate/src/tokens/ERC20.sol'; import '@openzeppelin/contracts/utils/cryptography/MerkleProof.sol'; import '@openzeppelin/contracts/access/Ownable.sol'; contract SideShiftVault is ERC4626, Ownable { using SafeCastLib for uint256; using SafeTransferLib for ERC20; using FixedPointMathLib for uint256; /// @notice the underlying token the vault accepts ERC20 public immutable UNDERLYING; /// @notice bool clarifying vault's have been initialized bool public contractInitialized; /// @notice Event emits when vault is initialized event ContractInitialization(address indexed user); /// @notice bool clarifying if shares have been minted for merkle claimees bool public merkleMinted; /// @notice The root hash of the Merkle tree - as it won't change made immutable bytes32 public immutable merkleRoot; /// @notice The number of shares in the vault not claimed from the merkle tree uint256 public merkleUnclaimed; /// @notice mapping for addresses in merkle that have claimed mapping(address => bool) public merkleClaimed; /// @notice Event emits when shares for address in merkle are minted event MerkleSharesMinted(address indexed user, uint256 shares); /// @notice Event emits when address in merkle claims shares event MerkleClaim(address indexed user, uint256 amount); /// Merkle root used as a param at deployment constructor(ERC20 _UNDERLYING, bytes32 _merkleRoot) ERC4626( _UNDERLYING, string( abi.encodePacked('SideShift ', _UNDERLYING.name(), ' Vault') ), string(abi.encodePacked('sv', _UNDERLYING.symbol())) ) { UNDERLYING = _UNDERLYING; totalSupply = type(uint256).max; merkleRoot = _merkleRoot; } // ================ VAULT ACCOUNTING ==================== // /// @notice Calculates the current balance of the underlying token i.e. XAI /// @return The contract's balance of XAI function totalAssets() public view override returns (uint256) { return UNDERLYING.balanceOf(address(this)); } /// @notice Calculates the max depositable amount of the underlying token /// @return The outstanding balance of XAI token not staked in the contract function maxDeposit(address _address) public view override returns (uint256) { return UNDERLYING.balanceOf(_address); } /// @notice Calculates the max mintable shares /// @return The amount of shares mintable for total supply of unstaked XAI function maxMint(address _address) public view override returns (uint256) { return previewDeposit(UNDERLYING.balanceOf(_address)); } // ================== MERKLE TREE CLAIM ========================== // /// @notice Mints shares to contract that can be claimed by addresses in merkle function merkleMint( uint256 _shares, uint256 _amount, address _sender ) internal { require(_amount == _shares, 'INSUFFICIENT_AMOUNT'); merkleMinted = true; merkleUnclaimed = _shares; _mint(address(this), _shares); emit MerkleSharesMinted(_sender, _shares); } /// @notice Claims eligible amount of shares for address in merkle function claimShares( address _sender, uint256 _amount, bytes32[] calldata merkleProof ) external { require(!merkleClaimed[_sender], 'ALREADY_CLAIMED'); // Verify the merkle proof bytes32 node = keccak256(abi.encodePacked(_sender, _amount)); require( MerkleProof.verify(merkleProof, merkleRoot, node), 'INVALID_PROOF' ); // Set address to claimed and deduct shares from merkle unclaimed total merkleClaimed[_sender] = true; merkleUnclaimed -= _amount; // Mint shares and burn contract shares --> Transfer uses callers as msg.sender // And TransferFrom would require allowance for every merkle address _burn(address(this), _amount); _mint(_sender, _amount); // Emit claim event emit MerkleClaim(_sender, _amount); } function checkMerkle( address _sender, uint256 _amount, bytes32[] calldata merkleProof ) external view returns (bool) { bytes32 node = keccak256(abi.encodePacked(_sender, _amount)); require( MerkleProof.verify(merkleProof, merkleRoot, node), 'INVALID_PROOF' ); return true; } /// @notice Emergency function to transfer shares to owner if the merkle root missed an address /// Shares can then be transferred from the owner to the address missed from the merkle function emergencyMerkleTransfer(uint256 _amount) external onlyOwner { require(_amount <= merkleUnclaimed, 'CLAIM_TOO_HIGH'); merkleUnclaimed -= _amount; _burn(address(this), _amount); _mint(msg.sender, _amount); } // ================= ADMIN FUNCTIONs =============== // /// @notice Initializes contract by setting totalSupply to 0 from type(uint256).max /// Added merkle + deposit to avoid front run risk on the deposit function vaultInitialize(uint256 _shares, uint256 _amount) external onlyOwner { require(!contractInitialized, 'ALREADY_INITIALIZED'); // Setting supply to 0 to initialize contract from overflow state contractInitialized = true; totalSupply = 0; // Mint shares for all addresses in merkle tree and hold in contract merkleMint(_shares, _amount, msg.sender); require( UNDERLYING.transferFrom(msg.sender, address(this), _amount), 'TRANSFER_FAIL' ); emit ContractInitialization(msg.sender); } }
// SPDX-License-Identifier: AGPL-3.0-only pragma solidity >=0.8.0; /// @notice Safe unsigned integer casting library that reverts on overflow. /// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/utils/SafeCastLib.sol) /// @author Modified from OpenZeppelin (https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/math/SafeCast.sol) library SafeCastLib { function safeCastTo248(uint256 x) internal pure returns (uint248 y) { require(x < 1 << 248); y = uint248(x); } function safeCastTo224(uint256 x) internal pure returns (uint224 y) { require(x < 1 << 224); y = uint224(x); } function safeCastTo192(uint256 x) internal pure returns (uint192 y) { require(x < 1 << 192); y = uint192(x); } function safeCastTo160(uint256 x) internal pure returns (uint160 y) { require(x < 1 << 160); y = uint160(x); } function safeCastTo128(uint256 x) internal pure returns (uint128 y) { require(x < 1 << 128); y = uint128(x); } function safeCastTo96(uint256 x) internal pure returns (uint96 y) { require(x < 1 << 96); y = uint96(x); } function safeCastTo64(uint256 x) internal pure returns (uint64 y) { require(x < 1 << 64); y = uint64(x); } function safeCastTo32(uint256 x) internal pure returns (uint32 y) { require(x < 1 << 32); y = uint32(x); } function safeCastTo8(uint256 x) internal pure returns (uint8 y) { require(x < 1 << 8); y = uint8(x); } }
// 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/Rari-Capital/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; 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; 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), from) // Append the "from" argument. mstore(add(freeMemoryPointer, 36), to) // Append the "to" argument. mstore(add(freeMemoryPointer, 68), amount) // Append the "amount" argument. 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; 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), to) // Append the "to" argument. mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument. 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; 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), to) // Append the "to" argument. mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument. 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/Rari-Capital/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 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) { assembly { // Store x * y in z for now. z := mul(x, y) // Equivalent to require(denominator != 0 && (x == 0 || (x * y) / x == y)) if iszero(and(iszero(iszero(denominator)), or(iszero(x), eq(div(z, x), y)))) { revert(0, 0) } // Divide z by the denominator. z := div(z, denominator) } } function mulDivUp( uint256 x, uint256 y, uint256 denominator ) internal pure returns (uint256 z) { assembly { // Store x * y in z for now. z := mul(x, y) // Equivalent to require(denominator != 0 && (x == 0 || (x * y) / x == y)) if iszero(and(iszero(iszero(denominator)), or(iszero(x), eq(div(z, x), y)))) { revert(0, 0) } // First, divide z - 1 by the denominator and add 1. // We allow z - 1 to underflow if z is 0, because we multiply the // end result by 0 if z is zero, ensuring we return 0 if z is zero. z := mul(iszero(iszero(z)), add(div(sub(z, 1), denominator), 1)) } } function rpow( uint256 x, uint256 n, uint256 scalar ) internal pure returns (uint256 z) { 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) { assembly { // Start off with z at 1. z := 1 // Used below to help find a nearby power of 2. let y := x // Find the lowest power of 2 that is at least sqrt(x). if iszero(lt(y, 0x100000000000000000000000000000000)) { y := shr(128, y) // Like dividing by 2 ** 128. z := shl(64, z) // Like multiplying by 2 ** 64. } if iszero(lt(y, 0x10000000000000000)) { y := shr(64, y) // Like dividing by 2 ** 64. z := shl(32, z) // Like multiplying by 2 ** 32. } if iszero(lt(y, 0x100000000)) { y := shr(32, y) // Like dividing by 2 ** 32. z := shl(16, z) // Like multiplying by 2 ** 16. } if iszero(lt(y, 0x10000)) { y := shr(16, y) // Like dividing by 2 ** 16. z := shl(8, z) // Like multiplying by 2 ** 8. } if iszero(lt(y, 0x100)) { y := shr(8, y) // Like dividing by 2 ** 8. z := shl(4, z) // Like multiplying by 2 ** 4. } if iszero(lt(y, 0x10)) { y := shr(4, y) // Like dividing by 2 ** 4. z := shl(2, z) // Like multiplying by 2 ** 2. } if iszero(lt(y, 0x8)) { // Equivalent to 2 ** z. z := shl(1, z) } // Shifting right by 1 is like dividing by 2. 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))) // Compute a rounded down version of z. let zRoundDown := div(x, z) // If zRoundDown is smaller, use it. if lt(zRoundDown, z) { z := zRoundDown } } } }
// 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/Rari-Capital/solmate/blob/main/src/mixins/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/Rari-Capital/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: MIT // OpenZeppelin Contracts (last updated v4.6.0) (utils/cryptography/MerkleProof.sol) pragma solidity ^0.8.0; /** * @dev These functions deal with verification of Merkle Trees proofs. * * The proofs can be generated using the JavaScript library * https://github.com/miguelmota/merkletreejs[merkletreejs]. * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled. * * See `test/utils/cryptography/MerkleProof.test.js` for some examples. * * WARNING: You should avoid using leaf values that are 64 bytes long prior to * hashing, or use a hash function other than keccak256 for hashing leaves. * This is because the concatenation of a sorted pair of internal nodes in * the merkle tree could be reinterpreted as a leaf value. */ library MerkleProof { /** * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree * defined by `root`. For this, a `proof` must be provided, containing * sibling hashes on the branch from the leaf to the root of the tree. Each * pair of leaves and each pair of pre-images are assumed to be sorted. */ function verify( bytes32[] memory proof, bytes32 root, bytes32 leaf ) internal pure returns (bool) { return processProof(proof, leaf) == root; } /** * @dev Returns the rebuilt hash obtained by traversing a Merkle tree up * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt * hash matches the root of the tree. When processing the proof, the pairs * of leafs & pre-images are assumed to be sorted. * * _Available since v4.4._ */ function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) { bytes32 computedHash = leaf; for (uint256 i = 0; i < proof.length; i++) { bytes32 proofElement = proof[i]; if (computedHash <= proofElement) { // Hash(current computed hash + current element of the proof) computedHash = _efficientHash(computedHash, proofElement); } else { // Hash(current element of the proof + current computed hash) computedHash = _efficientHash(proofElement, computedHash); } } return computedHash; } function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) { assembly { mstore(0x00, a) mstore(0x20, b) value := keccak256(0x00, 0x40) } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
{ "optimizer": { "enabled": false, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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[{"inputs":[{"internalType":"contract ERC20","name":"_UNDERLYING","type":"address"},{"internalType":"bytes32","name":"_merkleRoot","type":"bytes32"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"}],"name":"ContractInitialization","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"caller","type":"address"},{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":false,"internalType":"uint256","name":"assets","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"shares","type":"uint256"}],"name":"Deposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"MerkleClaim","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"shares","type":"uint256"}],"name":"MerkleSharesMinted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"caller","type":"address"},{"indexed":true,"internalType":"address","name":"receiver","type":"address"},{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":false,"internalType":"uint256","name":"assets","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"shares","type":"uint256"}],"name":"Withdraw","type":"event"},{"inputs":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"UNDERLYING","outputs":[{"internalType":"contract ERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"asset","outputs":[{"internalType":"contract ERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_sender","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"bytes32[]","name":"merkleProof","type":"bytes32[]"}],"name":"checkMerkle","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_sender","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"bytes32[]","name":"merkleProof","type":"bytes32[]"}],"name":"claimShares","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"contractInitialized","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"shares","type":"uint256"}],"name":"convertToAssets","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"assets","type":"uint256"}],"name":"convertToShares","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"assets","type":"uint256"},{"internalType":"address","name":"receiver","type":"address"}],"name":"deposit","outputs":[{"internalType":"uint256","name":"shares","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"emergencyMerkleTransfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_address","type":"address"}],"name":"maxDeposit","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_address","type":"address"}],"name":"maxMint","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"maxRedeem","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"maxWithdraw","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"merkleClaimed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"merkleMinted","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"merkleRoot","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"merkleUnclaimed","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"shares","type":"uint256"},{"internalType":"address","name":"receiver","type":"address"}],"name":"mint","outputs":[{"internalType":"uint256","name":"assets","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"assets","type":"uint256"}],"name":"previewDeposit","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"shares","type":"uint256"}],"name":"previewMint","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"shares","type":"uint256"}],"name":"previewRedeem","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"assets","type":"uint256"}],"name":"previewWithdraw","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"shares","type":"uint256"},{"internalType":"address","name":"receiver","type":"address"},{"internalType":"address","name":"owner","type":"address"}],"name":"redeem","outputs":[{"internalType":"uint256","name":"assets","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalAssets","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_shares","type":"uint256"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"vaultInitialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"assets","type":"uint256"},{"internalType":"address","name":"receiver","type":"address"},{"internalType":"address","name":"owner","type":"address"}],"name":"withdraw","outputs":[{"internalType":"uint256","name":"shares","type":"uint256"}],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000035e78b3982e87ecfd5b3f3265b601c046cdbe23228b0741a22d989deaf7e2182634898a13e217d4997b3a4094779c5227e104f18
-----Decoded View---------------
Arg [0] : _UNDERLYING (address): 0x35e78b3982E87ecfD5b3f3265B601c046cDBe232
Arg [1] : _merkleRoot (bytes32): 0x28b0741a22d989deaf7e2182634898a13e217d4997b3a4094779c5227e104f18
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 00000000000000000000000035e78b3982e87ecfd5b3f3265b601c046cdbe232
Arg [1] : 28b0741a22d989deaf7e2182634898a13e217d4997b3a4094779c5227e104f18
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