ERC-20
Overview
Max Total Supply
151,104.973284947406622296 pHPOS10
Holders
13
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 18 Decimals)
Balance
0.000000000000000001 pHPOS10Value
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Similar Match Source Code This contract matches the deployed Bytecode of the Source Code for Contract 0x3a590132...1c9f4a431 The constructor portion of the code might be different and could alter the actual behaviour of the contract
Contract Name:
WeightedIndex
Compiler Version
v0.8.19+commit.7dd6d404
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// https://peapods.finance // SPDX-License-Identifier: MIT pragma solidity ^0.8.19; import '@uniswap/v3-core/contracts/libraries/FixedPoint96.sol'; import './interfaces/IUniswapV2Pair.sol'; import './interfaces/IV3TwapUtilities.sol'; import './DecentralizedIndex.sol'; contract WeightedIndex is DecentralizedIndex { using SafeERC20 for IERC20; IUniswapV2Factory immutable V2_FACTORY; uint256 _totalWeights; constructor( string memory _name, string memory _symbol, Fees memory _fees, address[] memory _tokens, uint256[] memory _weights, address _partner, address _pairedLpToken, address _lpRewardsToken, address _v2Router, bool _stakeRestriction ) DecentralizedIndex( _name, _symbol, IndexType.WEIGHTED, _fees, _partner, _pairedLpToken, _lpRewardsToken, _v2Router, _stakeRestriction ) { V2_FACTORY = IUniswapV2Factory(IUniswapV2Router02(_v2Router).factory()); require(_tokens.length == _weights.length, 'INIT'); for (uint256 _i; _i < _tokens.length; _i++) { require(!_isTokenInIndex[_tokens[_i]], 'DUP'); require(_weights[_i] > 0, 'WVAL'); indexTokens.push( IndexAssetInfo({ token: _tokens[_i], basePriceUSDX96: 0, weighting: _weights[_i], c1: address(0), q1: 0 // amountsPerIdxTokenX96 }) ); _totalWeights += _weights[_i]; _fundTokenIdx[_tokens[_i]] = _i; _isTokenInIndex[_tokens[_i]] = true; } // at idx == 0, need to find X in [1/X = tokenWeightAtIdx/totalWeights] // at idx > 0, need to find Y in (Y/X = tokenWeightAtIdx/totalWeights) uint256 _xX96 = (FixedPoint96.Q96 * _totalWeights) / _weights[0]; for (uint256 _i; _i < _tokens.length; _i++) { indexTokens[_i].q1 = (_weights[_i] * _xX96 * 10 ** IERC20Metadata(_tokens[_i]).decimals()) / _totalWeights; } } function _getNativePriceUSDX96() internal view returns (uint256) { IUniswapV2Pair _nativeStablePool = IUniswapV2Pair( V2_FACTORY.getPair(DAI, WETH) ); address _token0 = _nativeStablePool.token0(); (uint8 _decimals0, uint8 _decimals1) = ( IERC20Metadata(_token0).decimals(), IERC20Metadata(_nativeStablePool.token1()).decimals() ); (uint112 _res0, uint112 _res1, ) = _nativeStablePool.getReserves(); return _token0 == DAI ? (FixedPoint96.Q96 * _res0 * 10 ** _decimals1) / _res1 / 10 ** _decimals0 : (FixedPoint96.Q96 * _res1 * 10 ** _decimals0) / _res0 / 10 ** _decimals1; } function _getTokenPriceUSDX96( address _token ) internal view returns (uint256) { if (_token == WETH) { return _getNativePriceUSDX96(); } IUniswapV2Pair _pool = IUniswapV2Pair(V2_FACTORY.getPair(_token, WETH)); address _token0 = _pool.token0(); uint8 _decimals0 = IERC20Metadata(_token0).decimals(); uint8 _decimals1 = IERC20Metadata(_pool.token1()).decimals(); (uint112 _res0, uint112 _res1, ) = _pool.getReserves(); uint256 _nativePriceUSDX96 = _getNativePriceUSDX96(); return _token0 == WETH ? (_nativePriceUSDX96 * _res0 * 10 ** _decimals1) / _res1 / 10 ** _decimals0 : (_nativePriceUSDX96 * _res1 * 10 ** _decimals0) / _res0 / 10 ** _decimals1; } function bond( address _token, uint256 _amount, uint256 _amountMintMin ) external override lock noSwapOrFee { require(_isTokenInIndex[_token], 'INVALIDTOKEN'); uint256 _tokenIdx = _fundTokenIdx[_token]; uint256 _tokenCurSupply = IERC20(_token).balanceOf(address(this)); bool _firstIn = _isFirstIn(); uint256 _tokenAmtSupplyRatioX96 = _firstIn ? FixedPoint96.Q96 : (_amount * FixedPoint96.Q96) / _tokenCurSupply; uint256 _tokensMinted; if (_firstIn) { _tokensMinted = (_amount * FixedPoint96.Q96 * 10 ** decimals()) / indexTokens[_tokenIdx].q1; } else { _tokensMinted = (totalSupply() * _tokenAmtSupplyRatioX96) / FixedPoint96.Q96; } uint256 _feeTokens = _canWrapFeeFree(_msgSender()) ? 0 : (_tokensMinted * fees.bond) / DEN; require(_tokensMinted - _feeTokens >= _amountMintMin, 'MIN'); _mint(_msgSender(), _tokensMinted - _feeTokens); if (_feeTokens > 0) { _mint(address(this), _feeTokens); _processBurnFee(_feeTokens); } for (uint256 _i; _i < indexTokens.length; _i++) { uint256 _transferAmt = _firstIn ? getInitialAmount(_token, _amount, indexTokens[_i].token) : (IERC20(indexTokens[_i].token).balanceOf(address(this)) * _tokenAmtSupplyRatioX96) / FixedPoint96.Q96; _transferFromAndValidate( IERC20(indexTokens[_i].token), _msgSender(), _transferAmt ); } _bond(); emit Bond(_msgSender(), _token, _amount, _tokensMinted); } function debond( uint256 _amount, address[] memory, uint8[] memory ) external override lock noSwapOrFee { uint256 _amountAfterFee = _isLastOut(_amount) ? _amount : (_amount * (DEN - fees.debond)) / DEN; uint256 _percAfterFeeX96 = (_amountAfterFee * FixedPoint96.Q96) / totalSupply(); super._transfer(_msgSender(), address(this), _amount); _burn(address(this), _amountAfterFee); _processBurnFee(_amount - _amountAfterFee); for (uint256 _i; _i < indexTokens.length; _i++) { uint256 _tokenSupply = IERC20(indexTokens[_i].token).balanceOf( address(this) ); uint256 _debondAmount = (_tokenSupply * _percAfterFeeX96) / FixedPoint96.Q96; if (_debondAmount > 0) { IERC20(indexTokens[_i].token).safeTransfer(_msgSender(), _debondAmount); } } emit Debond(_msgSender(), _amount); } function getInitialAmount( address _sourceToken, uint256 _sourceAmount, address _targetToken ) public view override returns (uint256) { uint256 _sourceTokenIdx = _fundTokenIdx[_sourceToken]; uint256 _targetTokenIdx = _fundTokenIdx[_targetToken]; return (_sourceAmount * indexTokens[_targetTokenIdx].weighting * 10 ** IERC20Metadata(_targetToken).decimals()) / indexTokens[_sourceTokenIdx].weighting / 10 ** IERC20Metadata(_sourceToken).decimals(); } /// @notice This is used as a frontend helper but is NOT safe to be used as an oracle. function getTokenPriceUSDX96( address _token ) external view override returns (uint256) { return _getTokenPriceUSDX96(_token); } /// @notice This is used as a frontend helper but is NOT safe to be used as an oracle. function getIdxPriceUSDX96() public view override returns (uint256, uint256) { uint256 _priceX96; uint256 _X96_2 = 2 ** (96 / 2); for (uint256 _i; _i < indexTokens.length; _i++) { uint256 _tokenPriceUSDX96_2 = _getTokenPriceUSDX96( indexTokens[_i].token ) / _X96_2; _priceX96 += (_tokenPriceUSDX96_2 * indexTokens[_i].q1) / 10 ** IERC20Metadata(indexTokens[_i].token).decimals() / _X96_2; } return (0, _priceX96); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (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 Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby disabling 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 (last updated v4.9.0) (interfaces/IERC5267.sol) pragma solidity ^0.8.0; interface IERC5267 { /** * @dev MAY be emitted to signal that the domain could have changed. */ event EIP712DomainChanged(); /** * @dev returns the fields and values that describe the domain separator used by this contract for EIP-712 * signature. */ function eip712Domain() external view returns ( bytes1 fields, string memory name, string memory version, uint256 chainId, address verifyingContract, bytes32 salt, uint256[] memory extensions ); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; import "./IERC20.sol"; import "./extensions/IERC20Metadata.sol"; import "../../utils/Context.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * The default value of {decimals} is 18. To change this, you should override * this function so it returns a different value. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20, IERC20Metadata { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the default value returned by this function, unless * it's overridden. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, allowance(owner, spender) + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { address owner = _msgSender(); uint256 currentAllowance = allowance(owner, spender); require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `from` to `to`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer(address from, address to, uint256 amount) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by // decrementing then incrementing. _balances[to] += amount; } emit Transfer(from, to, amount); _afterTokenTransfer(from, to, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; unchecked { // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above. _balances[account] += amount; } emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; // Overflow not possible: amount <= accountBalance <= totalSupply. _totalSupply -= amount; } emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Updates `owner` s allowance for `spender` based on spent `amount`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance(address owner, address spender, uint256 amount) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {} }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/ERC20Permit.sol) pragma solidity ^0.8.0; import "./IERC20Permit.sol"; import "../ERC20.sol"; import "../../../utils/cryptography/ECDSA.sol"; import "../../../utils/cryptography/EIP712.sol"; import "../../../utils/Counters.sol"; /** * @dev Implementation of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. * * _Available since v3.4._ */ abstract contract ERC20Permit is ERC20, IERC20Permit, EIP712 { using Counters for Counters.Counter; mapping(address => Counters.Counter) private _nonces; // solhint-disable-next-line var-name-mixedcase bytes32 private constant _PERMIT_TYPEHASH = keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"); /** * @dev In previous versions `_PERMIT_TYPEHASH` was declared as `immutable`. * However, to ensure consistency with the upgradeable transpiler, we will continue * to reserve a slot. * @custom:oz-renamed-from _PERMIT_TYPEHASH */ // solhint-disable-next-line var-name-mixedcase bytes32 private _PERMIT_TYPEHASH_DEPRECATED_SLOT; /** * @dev Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `"1"`. * * It's a good idea to use the same `name` that is defined as the ERC20 token name. */ constructor(string memory name) EIP712(name, "1") {} /** * @dev See {IERC20Permit-permit}. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) public virtual override { require(block.timestamp <= deadline, "ERC20Permit: expired deadline"); bytes32 structHash = keccak256(abi.encode(_PERMIT_TYPEHASH, owner, spender, value, _useNonce(owner), deadline)); bytes32 hash = _hashTypedDataV4(structHash); address signer = ECDSA.recover(hash, v, r, s); require(signer == owner, "ERC20Permit: invalid signature"); _approve(owner, spender, value); } /** * @dev See {IERC20Permit-nonces}. */ function nonces(address owner) public view virtual override returns (uint256) { return _nonces[owner].current(); } /** * @dev See {IERC20Permit-DOMAIN_SEPARATOR}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view override returns (bytes32) { return _domainSeparatorV4(); } /** * @dev "Consume a nonce": return the current value and increment. * * _Available since v4.1._ */ function _useNonce(address owner) internal virtual returns (uint256 current) { Counters.Counter storage nonce = _nonces[owner]; current = nonce.current(); nonce.increment(); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. */ interface IERC20Permit { /** * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, * given ``owner``'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 amount) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; import "../extensions/IERC20Permit.sol"; import "../../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using Address for address; /** * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } /** * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful. */ function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } /** * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 oldAllowance = token.allowance(address(this), spender); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value)); } /** * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { unchecked { uint256 oldAllowance = token.allowance(address(this), spender); require(oldAllowance >= value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value)); } } /** * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. Compatible with tokens that require the approval to be set to * 0 before setting it to a non-zero value. */ function forceApprove(IERC20 token, address spender, uint256 value) internal { bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value); if (!_callOptionalReturnBool(token, approvalCall)) { _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0)); _callOptionalReturn(token, approvalCall); } } /** * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`. * Revert on invalid signature. */ function safePermit( IERC20Permit token, address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) internal { uint256 nonceBefore = token.nonces(owner); token.permit(owner, spender, value, deadline, v, r, s); uint256 nonceAfter = token.nonces(owner); require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed"); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). * * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead. */ function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false // and not revert is the subcall reverts. (bool success, bytes memory returndata) = address(token).call(data); return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * * Furthermore, `isContract` will also return true if the target contract within * the same transaction is already scheduled for destruction by `SELFDESTRUCT`, * which only has an effect at the end of a transaction. * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
// 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; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Counters.sol) pragma solidity ^0.8.0; /** * @title Counters * @author Matt Condon (@shrugs) * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number * of elements in a mapping, issuing ERC721 ids, or counting request ids. * * Include with `using Counters for Counters.Counter;` */ library Counters { struct Counter { // This variable should never be directly accessed by users of the library: interactions must be restricted to // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add // this feature: see https://github.com/ethereum/solidity/issues/4637 uint256 _value; // default: 0 } function current(Counter storage counter) internal view returns (uint256) { return counter._value; } function increment(Counter storage counter) internal { unchecked { counter._value += 1; } } function decrement(Counter storage counter) internal { uint256 value = counter._value; require(value > 0, "Counter: decrement overflow"); unchecked { counter._value = value - 1; } } function reset(Counter storage counter) internal { counter._value = 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/ECDSA.sol) pragma solidity ^0.8.0; import "../Strings.sol"; /** * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations. * * These functions can be used to verify that a message was signed by the holder * of the private keys of a given address. */ library ECDSA { enum RecoverError { NoError, InvalidSignature, InvalidSignatureLength, InvalidSignatureS, InvalidSignatureV // Deprecated in v4.8 } function _throwError(RecoverError error) private pure { if (error == RecoverError.NoError) { return; // no error: do nothing } else if (error == RecoverError.InvalidSignature) { revert("ECDSA: invalid signature"); } else if (error == RecoverError.InvalidSignatureLength) { revert("ECDSA: invalid signature length"); } else if (error == RecoverError.InvalidSignatureS) { revert("ECDSA: invalid signature 's' value"); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature` or error string. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. * * Documentation for signature generation: * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js] * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers] * * _Available since v4.3._ */ function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) { if (signature.length == 65) { bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. /// @solidity memory-safe-assembly assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } return tryRecover(hash, v, r, s); } else { return (address(0), RecoverError.InvalidSignatureLength); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, signature); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately. * * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures] * * _Available since v4.3._ */ function tryRecover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address, RecoverError) { bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff); uint8 v = uint8((uint256(vs) >> 255) + 27); return tryRecover(hash, v, r, s); } /** * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately. * * _Available since v4.2._ */ function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, r, vs); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `v`, * `r` and `s` signature fields separately. * * _Available since v4.3._ */ function tryRecover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address, RecoverError) { // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { return (address(0), RecoverError.InvalidSignatureS); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); if (signer == address(0)) { return (address(0), RecoverError.InvalidSignature); } return (signer, RecoverError.NoError); } /** * @dev Overload of {ECDSA-recover} that receives the `v`, * `r` and `s` signature fields separately. */ function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, v, r, s); _throwError(error); return recovered; } /** * @dev Returns an Ethereum Signed Message, created from a `hash`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32 message) { // 32 is the length in bytes of hash, // enforced by the type signature above /// @solidity memory-safe-assembly assembly { mstore(0x00, "\x19Ethereum Signed Message:\n32") mstore(0x1c, hash) message := keccak256(0x00, 0x3c) } } /** * @dev Returns an Ethereum Signed Message, created from `s`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s)); } /** * @dev Returns an Ethereum Signed Typed Data, created from a * `domainSeparator` and a `structHash`. This produces hash corresponding * to the one signed with the * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] * JSON-RPC method as part of EIP-712. * * See {recover}. */ function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 data) { /// @solidity memory-safe-assembly assembly { let ptr := mload(0x40) mstore(ptr, "\x19\x01") mstore(add(ptr, 0x02), domainSeparator) mstore(add(ptr, 0x22), structHash) data := keccak256(ptr, 0x42) } } /** * @dev Returns an Ethereum Signed Data with intended validator, created from a * `validator` and `data` according to the version 0 of EIP-191. * * See {recover}. */ function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19\x00", validator, data)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/EIP712.sol) pragma solidity ^0.8.8; import "./ECDSA.sol"; import "../ShortStrings.sol"; import "../../interfaces/IERC5267.sol"; /** * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data. * * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible, * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding * they need in their contracts using a combination of `abi.encode` and `keccak256`. * * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA * ({_hashTypedDataV4}). * * The implementation of the domain separator was designed to be as efficient as possible while still properly updating * the chain id to protect against replay attacks on an eventual fork of the chain. * * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask]. * * NOTE: In the upgradeable version of this contract, the cached values will correspond to the address, and the domain * separator of the implementation contract. This will cause the `_domainSeparatorV4` function to always rebuild the * separator from the immutable values, which is cheaper than accessing a cached version in cold storage. * * _Available since v3.4._ * * @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment */ abstract contract EIP712 is IERC5267 { using ShortStrings for *; bytes32 private constant _TYPE_HASH = keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"); // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to // invalidate the cached domain separator if the chain id changes. bytes32 private immutable _cachedDomainSeparator; uint256 private immutable _cachedChainId; address private immutable _cachedThis; bytes32 private immutable _hashedName; bytes32 private immutable _hashedVersion; ShortString private immutable _name; ShortString private immutable _version; string private _nameFallback; string private _versionFallback; /** * @dev Initializes the domain separator and parameter caches. * * The meaning of `name` and `version` is specified in * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]: * * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol. * - `version`: the current major version of the signing domain. * * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart * contract upgrade]. */ constructor(string memory name, string memory version) { _name = name.toShortStringWithFallback(_nameFallback); _version = version.toShortStringWithFallback(_versionFallback); _hashedName = keccak256(bytes(name)); _hashedVersion = keccak256(bytes(version)); _cachedChainId = block.chainid; _cachedDomainSeparator = _buildDomainSeparator(); _cachedThis = address(this); } /** * @dev Returns the domain separator for the current chain. */ function _domainSeparatorV4() internal view returns (bytes32) { if (address(this) == _cachedThis && block.chainid == _cachedChainId) { return _cachedDomainSeparator; } else { return _buildDomainSeparator(); } } function _buildDomainSeparator() private view returns (bytes32) { return keccak256(abi.encode(_TYPE_HASH, _hashedName, _hashedVersion, block.chainid, address(this))); } /** * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this * function returns the hash of the fully encoded EIP712 message for this domain. * * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example: * * ```solidity * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode( * keccak256("Mail(address to,string contents)"), * mailTo, * keccak256(bytes(mailContents)) * ))); * address signer = ECDSA.recover(digest, signature); * ``` */ function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) { return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash); } /** * @dev See {EIP-5267}. * * _Available since v4.9._ */ function eip712Domain() public view virtual override returns ( bytes1 fields, string memory name, string memory version, uint256 chainId, address verifyingContract, bytes32 salt, uint256[] memory extensions ) { return ( hex"0f", // 01111 _name.toStringWithFallback(_nameFallback), _version.toStringWithFallback(_versionFallback), block.chainid, address(this), bytes32(0), new uint256[](0) ); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol) pragma solidity ^0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { enum Rounding { Down, // Toward negative infinity Up, // Toward infinity Zero // Toward zero } /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a > b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds up instead * of rounding down. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b - 1) / b can overflow on addition, so we distribute. return a == 0 ? 0 : (a - 1) / b + 1; } /** * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0 * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) * with further edits by Uniswap Labs also under MIT license. */ function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) { unchecked { // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2^256 + prod0. uint256 prod0; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(x, y, not(0)) prod0 := mul(x, y) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } // Handle non-overflow cases, 256 by 256 division. if (prod1 == 0) { // Solidity will revert if denominator == 0, unlike the div opcode on its own. // The surrounding unchecked block does not change this fact. // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic. return prod0 / denominator; } // Make sure the result is less than 2^256. Also prevents denominator == 0. require(denominator > prod1, "Math: mulDiv overflow"); /////////////////////////////////////////////// // 512 by 256 division. /////////////////////////////////////////////// // Make division exact by subtracting the remainder from [prod1 prod0]. uint256 remainder; assembly { // Compute remainder using mulmod. remainder := mulmod(x, y, denominator) // Subtract 256 bit number from 512 bit number. prod1 := sub(prod1, gt(remainder, prod0)) prod0 := sub(prod0, remainder) } // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1. // See https://cs.stackexchange.com/q/138556/92363. // Does not overflow because the denominator cannot be zero at this stage in the function. uint256 twos = denominator & (~denominator + 1); assembly { // Divide denominator by twos. denominator := div(denominator, twos) // Divide [prod1 prod0] by twos. prod0 := div(prod0, twos) // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one. twos := add(div(sub(0, twos), twos), 1) } // Shift in bits from prod1 into prod0. prod0 |= prod1 * twos; // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for // four bits. That is, denominator * inv = 1 mod 2^4. uint256 inverse = (3 * denominator) ^ 2; // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works // in modular arithmetic, doubling the correct bits in each step. inverse *= 2 - denominator * inverse; // inverse mod 2^8 inverse *= 2 - denominator * inverse; // inverse mod 2^16 inverse *= 2 - denominator * inverse; // inverse mod 2^32 inverse *= 2 - denominator * inverse; // inverse mod 2^64 inverse *= 2 - denominator * inverse; // inverse mod 2^128 inverse *= 2 - denominator * inverse; // inverse mod 2^256 // Because the division is now exact we can divide by multiplying with the modular inverse of denominator. // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inverse; return result; } } /** * @notice Calculates x * y / denominator with full precision, following the selected rounding direction. */ function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) { uint256 result = mulDiv(x, y, denominator); if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) { result += 1; } return result; } /** * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down. * * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11). */ function sqrt(uint256 a) internal pure returns (uint256) { if (a == 0) { return 0; } // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target. // // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`. // // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)` // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))` // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)` // // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit. uint256 result = 1 << (log2(a) >> 1); // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128, // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision // into the expected uint128 result. unchecked { result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; return min(result, a / result); } } /** * @notice Calculates sqrt(a), following the selected rounding direction. */ function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = sqrt(a); return result + (rounding == Rounding.Up && result * result < a ? 1 : 0); } } /** * @dev Return the log in base 2, rounded down, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 128; } if (value >> 64 > 0) { value >>= 64; result += 64; } if (value >> 32 > 0) { value >>= 32; result += 32; } if (value >> 16 > 0) { value >>= 16; result += 16; } if (value >> 8 > 0) { value >>= 8; result += 8; } if (value >> 4 > 0) { value >>= 4; result += 4; } if (value >> 2 > 0) { value >>= 2; result += 2; } if (value >> 1 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 2, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log2(value); return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0); } } /** * @dev Return the log in base 10, rounded down, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >= 10 ** 64) { value /= 10 ** 64; result += 64; } if (value >= 10 ** 32) { value /= 10 ** 32; result += 32; } if (value >= 10 ** 16) { value /= 10 ** 16; result += 16; } if (value >= 10 ** 8) { value /= 10 ** 8; result += 8; } if (value >= 10 ** 4) { value /= 10 ** 4; result += 4; } if (value >= 10 ** 2) { value /= 10 ** 2; result += 2; } if (value >= 10 ** 1) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log10(value); return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0); } } /** * @dev Return the log in base 256, rounded down, of a positive value. * Returns 0 if given 0. * * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string. */ function log256(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 16; } if (value >> 64 > 0) { value >>= 64; result += 8; } if (value >> 32 > 0) { value >>= 32; result += 4; } if (value >> 16 > 0) { value >>= 16; result += 2; } if (value >> 8 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 256, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log256(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log256(value); return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol) pragma solidity ^0.8.0; /** * @dev Standard signed math utilities missing in the Solidity language. */ library SignedMath { /** * @dev Returns the largest of two signed numbers. */ function max(int256 a, int256 b) internal pure returns (int256) { return a > b ? a : b; } /** * @dev Returns the smallest of two signed numbers. */ function min(int256 a, int256 b) internal pure returns (int256) { return a < b ? a : b; } /** * @dev Returns the average of two signed numbers without overflow. * The result is rounded towards zero. */ function average(int256 a, int256 b) internal pure returns (int256) { // Formula from the book "Hacker's Delight" int256 x = (a & b) + ((a ^ b) >> 1); return x + (int256(uint256(x) >> 255) & (a ^ b)); } /** * @dev Returns the absolute unsigned value of a signed value. */ function abs(int256 n) internal pure returns (uint256) { unchecked { // must be unchecked in order to support `n = type(int256).min` return uint256(n >= 0 ? n : -n); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/ShortStrings.sol) pragma solidity ^0.8.8; import "./StorageSlot.sol"; // | string | 0xAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA | // | length | 0x BB | type ShortString is bytes32; /** * @dev This library provides functions to convert short memory strings * into a `ShortString` type that can be used as an immutable variable. * * Strings of arbitrary length can be optimized using this library if * they are short enough (up to 31 bytes) by packing them with their * length (1 byte) in a single EVM word (32 bytes). Additionally, a * fallback mechanism can be used for every other case. * * Usage example: * * ```solidity * contract Named { * using ShortStrings for *; * * ShortString private immutable _name; * string private _nameFallback; * * constructor(string memory contractName) { * _name = contractName.toShortStringWithFallback(_nameFallback); * } * * function name() external view returns (string memory) { * return _name.toStringWithFallback(_nameFallback); * } * } * ``` */ library ShortStrings { // Used as an identifier for strings longer than 31 bytes. bytes32 private constant _FALLBACK_SENTINEL = 0x00000000000000000000000000000000000000000000000000000000000000FF; error StringTooLong(string str); error InvalidShortString(); /** * @dev Encode a string of at most 31 chars into a `ShortString`. * * This will trigger a `StringTooLong` error is the input string is too long. */ function toShortString(string memory str) internal pure returns (ShortString) { bytes memory bstr = bytes(str); if (bstr.length > 31) { revert StringTooLong(str); } return ShortString.wrap(bytes32(uint256(bytes32(bstr)) | bstr.length)); } /** * @dev Decode a `ShortString` back to a "normal" string. */ function toString(ShortString sstr) internal pure returns (string memory) { uint256 len = byteLength(sstr); // using `new string(len)` would work locally but is not memory safe. string memory str = new string(32); /// @solidity memory-safe-assembly assembly { mstore(str, len) mstore(add(str, 0x20), sstr) } return str; } /** * @dev Return the length of a `ShortString`. */ function byteLength(ShortString sstr) internal pure returns (uint256) { uint256 result = uint256(ShortString.unwrap(sstr)) & 0xFF; if (result > 31) { revert InvalidShortString(); } return result; } /** * @dev Encode a string into a `ShortString`, or write it to storage if it is too long. */ function toShortStringWithFallback(string memory value, string storage store) internal returns (ShortString) { if (bytes(value).length < 32) { return toShortString(value); } else { StorageSlot.getStringSlot(store).value = value; return ShortString.wrap(_FALLBACK_SENTINEL); } } /** * @dev Decode a string that was encoded to `ShortString` or written to storage using {setWithFallback}. */ function toStringWithFallback(ShortString value, string storage store) internal pure returns (string memory) { if (ShortString.unwrap(value) != _FALLBACK_SENTINEL) { return toString(value); } else { return store; } } /** * @dev Return the length of a string that was encoded to `ShortString` or written to storage using {setWithFallback}. * * WARNING: This will return the "byte length" of the string. This may not reflect the actual length in terms of * actual characters as the UTF-8 encoding of a single character can span over multiple bytes. */ function byteLengthWithFallback(ShortString value, string storage store) internal view returns (uint256) { if (ShortString.unwrap(value) != _FALLBACK_SENTINEL) { return byteLength(value); } else { return bytes(store).length; } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/StorageSlot.sol) // This file was procedurally generated from scripts/generate/templates/StorageSlot.js. pragma solidity ^0.8.0; /** * @dev Library for reading and writing primitive types to specific storage slots. * * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts. * This library helps with reading and writing to such slots without the need for inline assembly. * * The functions in this library return Slot structs that contain a `value` member that can be used to read or write. * * Example usage to set ERC1967 implementation slot: * ```solidity * contract ERC1967 { * bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc; * * function _getImplementation() internal view returns (address) { * return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value; * } * * function _setImplementation(address newImplementation) internal { * require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract"); * StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation; * } * } * ``` * * _Available since v4.1 for `address`, `bool`, `bytes32`, `uint256`._ * _Available since v4.9 for `string`, `bytes`._ */ library StorageSlot { struct AddressSlot { address value; } struct BooleanSlot { bool value; } struct Bytes32Slot { bytes32 value; } struct Uint256Slot { uint256 value; } struct StringSlot { string value; } struct BytesSlot { bytes value; } /** * @dev Returns an `AddressSlot` with member `value` located at `slot`. */ function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `BooleanSlot` with member `value` located at `slot`. */ function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `Bytes32Slot` with member `value` located at `slot`. */ function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `Uint256Slot` with member `value` located at `slot`. */ function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `StringSlot` with member `value` located at `slot`. */ function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `StringSlot` representation of the string storage pointer `store`. */ function getStringSlot(string storage store) internal pure returns (StringSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := store.slot } } /** * @dev Returns an `BytesSlot` with member `value` located at `slot`. */ function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`. */ function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := store.slot } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol) pragma solidity ^0.8.0; import "./math/Math.sol"; import "./math/SignedMath.sol"; /** * @dev String operations. */ library Strings { bytes16 private constant _SYMBOLS = "0123456789abcdef"; uint8 private constant _ADDRESS_LENGTH = 20; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { unchecked { uint256 length = Math.log10(value) + 1; string memory buffer = new string(length); uint256 ptr; /// @solidity memory-safe-assembly assembly { ptr := add(buffer, add(32, length)) } while (true) { ptr--; /// @solidity memory-safe-assembly assembly { mstore8(ptr, byte(mod(value, 10), _SYMBOLS)) } value /= 10; if (value == 0) break; } return buffer; } } /** * @dev Converts a `int256` to its ASCII `string` decimal representation. */ function toString(int256 value) internal pure returns (string memory) { return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value)))); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { unchecked { return toHexString(value, Math.log256(value) + 1); } } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } /** * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation. */ function toHexString(address addr) internal pure returns (string memory) { return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH); } /** * @dev Returns true if the two strings are equal. */ function equal(string memory a, string memory b) internal pure returns (bool) { return keccak256(bytes(a)) == keccak256(bytes(b)); } }
// SPDX-License-Identifier: GPL-2.0-or-later pragma solidity >=0.5.0; /// @title Callback for IUniswapV3PoolActions#swap /// @notice Any contract that calls IUniswapV3PoolActions#swap must implement this interface interface IUniswapV3SwapCallback { /// @notice Called to `msg.sender` after executing a swap via IUniswapV3Pool#swap. /// @dev In the implementation you must pay the pool tokens owed for the swap. /// The caller of this method must be checked to be a UniswapV3Pool deployed by the canonical UniswapV3Factory. /// amount0Delta and amount1Delta can both be 0 if no tokens were swapped. /// @param amount0Delta The amount of token0 that was sent (negative) or must be received (positive) by the pool by /// the end of the swap. If positive, the callback must send that amount of token0 to the pool. /// @param amount1Delta The amount of token1 that was sent (negative) or must be received (positive) by the pool by /// the end of the swap. If positive, the callback must send that amount of token1 to the pool. /// @param data Any data passed through by the caller via the IUniswapV3PoolActions#swap call function uniswapV3SwapCallback( int256 amount0Delta, int256 amount1Delta, bytes calldata data ) external; }
// SPDX-License-Identifier: GPL-2.0-or-later pragma solidity >=0.4.0; /// @title FixedPoint96 /// @notice A library for handling binary fixed point numbers, see https://en.wikipedia.org/wiki/Q_(number_format) /// @dev Used in SqrtPriceMath.sol library FixedPoint96 { uint8 internal constant RESOLUTION = 96; uint256 internal constant Q96 = 0x1000000000000000000000000; }
// SPDX-License-Identifier: GPL-2.0-or-later pragma solidity >=0.5.0; /// @title Immutable state /// @notice Functions that return immutable state of the router interface IPeripheryImmutableState { /// @return Returns the address of the Uniswap V3 factory function factory() external view returns (address); /// @return Returns the address of WETH9 function WETH9() external view returns (address); }
// SPDX-License-Identifier: GPL-2.0-or-later pragma solidity >=0.7.5; pragma abicoder v2; import '@uniswap/v3-core/contracts/interfaces/callback/IUniswapV3SwapCallback.sol'; /// @title Router token swapping functionality /// @notice Functions for swapping tokens via Uniswap V3 interface ISwapRouter is IUniswapV3SwapCallback { struct ExactInputSingleParams { address tokenIn; address tokenOut; uint24 fee; address recipient; uint256 deadline; uint256 amountIn; uint256 amountOutMinimum; uint160 sqrtPriceLimitX96; } /// @notice Swaps `amountIn` of one token for as much as possible of another token /// @param params The parameters necessary for the swap, encoded as `ExactInputSingleParams` in calldata /// @return amountOut The amount of the received token function exactInputSingle(ExactInputSingleParams calldata params) external payable returns (uint256 amountOut); struct ExactInputParams { bytes path; address recipient; uint256 deadline; uint256 amountIn; uint256 amountOutMinimum; } /// @notice Swaps `amountIn` of one token for as much as possible of another along the specified path /// @param params The parameters necessary for the multi-hop swap, encoded as `ExactInputParams` in calldata /// @return amountOut The amount of the received token function exactInput(ExactInputParams calldata params) external payable returns (uint256 amountOut); struct ExactOutputSingleParams { address tokenIn; address tokenOut; uint24 fee; address recipient; uint256 deadline; uint256 amountOut; uint256 amountInMaximum; uint160 sqrtPriceLimitX96; } /// @notice Swaps as little as possible of one token for `amountOut` of another token /// @param params The parameters necessary for the swap, encoded as `ExactOutputSingleParams` in calldata /// @return amountIn The amount of the input token function exactOutputSingle(ExactOutputSingleParams calldata params) external payable returns (uint256 amountIn); struct ExactOutputParams { bytes path; address recipient; uint256 deadline; uint256 amountOut; uint256 amountInMaximum; } /// @notice Swaps as little as possible of one token for `amountOut` of another along the specified path (reversed) /// @param params The parameters necessary for the multi-hop swap, encoded as `ExactOutputParams` in calldata /// @return amountIn The amount of the input token function exactOutput(ExactOutputParams calldata params) external payable returns (uint256 amountIn); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.19; import '@openzeppelin/contracts/access/Ownable.sol'; import '@openzeppelin/contracts/token/ERC20/ERC20.sol'; import '@openzeppelin/contracts/token/ERC20/extensions/ERC20Permit.sol'; import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol'; import './interfaces/IDecentralizedIndex.sol'; import './interfaces/IFlashLoanRecipient.sol'; import './interfaces/IProtocolFeeRouter.sol'; import './interfaces/ITokenRewards.sol'; import './interfaces/IUniswapV2Factory.sol'; import './interfaces/IUniswapV2Router02.sol'; import './StakingPoolToken.sol'; abstract contract DecentralizedIndex is IDecentralizedIndex, ERC20, ERC20Permit { using SafeERC20 for IERC20; uint256 constant DEN = 10000; uint256 constant SWAP_DELAY = 20; // seconds address constant DAI = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address constant V3_ROUTER = 0xE592427A0AEce92De3Edee1F18E0157C05861564; IProtocolFeeRouter constant PROTOCOL_FEE_ROUTER = IProtocolFeeRouter(0x7d544DD34ABbE24C8832db27820Ff53C151e949b); IV3TwapUtilities constant V3_TWAP_UTILS = IV3TwapUtilities(0x024ff47D552cB222b265D68C7aeB26E586D5229D); uint256 public constant override FLASH_FEE = 10; // 10 DAI address public immutable override PAIRED_LP_TOKEN; address immutable V2_ROUTER; address immutable V2_POOL; address immutable WETH; IndexType public immutable override indexType; uint256 public immutable override created; address public immutable override lpStakingPool; address public immutable override lpRewardsToken; address public override partner; Fees public fees; IndexAssetInfo[] public indexTokens; mapping(address => bool) _isTokenInIndex; mapping(address => uint256) _fundTokenIdx; uint256 _partnerFirstWrapped; uint256 _lastSwap; bool _swapping; bool _swapAndFeeOn = true; bool _unlocked = true; event FlashLoan( address indexed executor, address indexed recipient, address token, uint256 amount ); modifier lock() { require(_unlocked, 'LOCKED'); _unlocked = false; _; _unlocked = true; } modifier onlyPartner() { require(_msgSender() == partner, 'PARTNER'); _; } modifier onlyRewards() { require( _msgSender() == StakingPoolToken(lpStakingPool).poolRewards(), 'REWARDS' ); _; } modifier noSwapOrFee() { _swapAndFeeOn = false; _; _swapAndFeeOn = true; } constructor( string memory _name, string memory _symbol, IndexType _idxType, Fees memory _fees, address _partner, address _pairedLpToken, address _lpRewardsToken, address _v2Router, bool _stakeRestriction ) ERC20(_name, _symbol) ERC20Permit(_name) { require(_fees.buy <= (DEN * 20) / 100, 'lte20%'); require(_fees.sell <= (DEN * 20) / 100, 'lte20%'); require(_fees.burn <= (DEN * 70) / 100, 'lte70%'); require(_fees.bond <= (DEN * 99) / 100, 'lt99%'); require(_fees.debond <= (DEN * 99) / 100, 'lt99%'); require(_fees.partner <= (DEN * 5) / 100, 'lte5%'); indexType = _idxType; created = block.timestamp; fees = _fees; partner = _partner; lpRewardsToken = _lpRewardsToken; V2_ROUTER = _v2Router; address _finalPairedLpToken = _pairedLpToken == address(0) ? DAI : _pairedLpToken; PAIRED_LP_TOKEN = _finalPairedLpToken; address _v2Pool = IUniswapV2Factory(IUniswapV2Router02(_v2Router).factory()) .createPair(address(this), _finalPairedLpToken); lpStakingPool = address( new StakingPoolToken( string(abi.encodePacked('Staked ', _name)), string(abi.encodePacked('s', _symbol)), _finalPairedLpToken, _v2Pool, _lpRewardsToken, _stakeRestriction ? _msgSender() : address(0), PROTOCOL_FEE_ROUTER, V3_TWAP_UTILS ) ); V2_POOL = _v2Pool; WETH = IUniswapV2Router02(_v2Router).WETH(); emit Create(address(this), _msgSender()); } function _transfer( address _from, address _to, uint256 _amount ) internal virtual override { bool _buy = _from == V2_POOL && _to != address(V2_ROUTER); bool _sell = _to == V2_POOL; uint256 _fee; if (!_swapping && _swapAndFeeOn) { if (_from != V2_POOL) { _processPreSwapFeesAndSwap(); } if (_buy && fees.buy > 0) { _fee = (_amount * fees.buy) / DEN; super._transfer(_from, address(this), _fee); } if (_sell && fees.sell > 0) { _fee = (_amount * fees.sell) / DEN; super._transfer(_from, address(this), _fee); } } _processBurnFee(_fee); super._transfer(_from, _to, _amount - _fee); } function _processPreSwapFeesAndSwap() internal { bool _passesSwapDelay = block.timestamp > _lastSwap + SWAP_DELAY; uint256 _bal = balanceOf(address(this)); uint256 _lpBal = balanceOf(V2_POOL); uint256 _min = (_lpBal * 25) / 100000; // 0.025% LP bal if (_passesSwapDelay && _bal >= _min && _lpBal > 0) { _swapping = true; _lastSwap = block.timestamp; uint256 _totalAmt = _bal >= _min * 25 ? _min * 25 : _bal >= _min * 10 ? _min * 10 : _min; uint256 _partnerAmt; if (fees.partner > 0 && partner != address(0)) { _partnerAmt = (_totalAmt * fees.partner) / DEN; super._transfer(address(this), partner, _partnerAmt); } _feeSwap(_totalAmt - _partnerAmt); _swapping = false; } } function _processBurnFee(uint256 _amtToProcess) internal { if (_amtToProcess == 0 || fees.burn == 0) { return; } _burn(address(this), (_amtToProcess * fees.burn) / DEN); } function _feeSwap(uint256 _amount) internal { address[] memory path = new address[](2); path[0] = address(this); path[1] = PAIRED_LP_TOKEN; _approve(address(this), V2_ROUTER, _amount); address _rewards = StakingPoolToken(lpStakingPool).poolRewards(); uint256 _pairedLpBalBefore = IERC20(PAIRED_LP_TOKEN).balanceOf( address(this) ); address _recipient = PAIRED_LP_TOKEN == lpRewardsToken ? address(this) : _rewards; IUniswapV2Router02(V2_ROUTER) .swapExactTokensForTokensSupportingFeeOnTransferTokens( _amount, 0, path, _recipient, block.timestamp ); if (PAIRED_LP_TOKEN == lpRewardsToken) { uint256 _newPairedLpTkns = IERC20(PAIRED_LP_TOKEN).balanceOf( address(this) ) - _pairedLpBalBefore; if (_newPairedLpTkns > 0) { IERC20(PAIRED_LP_TOKEN).safeIncreaseAllowance( _rewards, _newPairedLpTkns ); ITokenRewards(_rewards).depositRewards(_newPairedLpTkns); } } else if (IERC20(PAIRED_LP_TOKEN).balanceOf(_rewards) > 0) { ITokenRewards(_rewards).depositFromPairedLpToken(0, 0); } } function _transferFromAndValidate( IERC20 _token, address _sender, uint256 _amount ) internal { uint256 _balanceBefore = _token.balanceOf(address(this)); _token.safeTransferFrom(_sender, address(this), _amount); require( _token.balanceOf(address(this)) >= _balanceBefore + _amount, 'TFRVAL' ); } function _bond() internal { if (_partnerFirstWrapped == 0 && _msgSender() == partner) { _partnerFirstWrapped = block.timestamp; } } function _canWrapFeeFree(address _wrapper) internal view returns (bool) { return _isFirstIn() || (_wrapper == partner && _partnerFirstWrapped == 0 && block.timestamp <= created + 7 days); } function _isFirstIn() internal view returns (bool) { return totalSupply() == 0; } function _isLastOut(uint256 _debondAmount) internal view returns (bool) { return _debondAmount >= (totalSupply() * 98) / 100; } function processPreSwapFeesAndSwap() external override onlyRewards { _processPreSwapFeesAndSwap(); } function BOND_FEE() external view override returns (uint256) { return fees.bond; } function DEBOND_FEE() external view override returns (uint256) { return fees.debond; } function isAsset(address _token) public view override returns (bool) { return _isTokenInIndex[_token]; } function getAllAssets() external view override returns (IndexAssetInfo[] memory) { return indexTokens; } function burn(uint256 _amount) external lock { _burn(_msgSender(), _amount); } function addLiquidityV2( uint256 _idxLPTokens, uint256 _pairedLPTokens, uint256 _slippage, // 100 == 10%, 1000 == 100% uint256 _deadline ) external override lock noSwapOrFee { uint256 _idxTokensBefore = balanceOf(address(this)); uint256 _pairedBefore = IERC20(PAIRED_LP_TOKEN).balanceOf(address(this)); super._transfer(_msgSender(), address(this), _idxLPTokens); _approve(address(this), V2_ROUTER, _idxLPTokens); IERC20(PAIRED_LP_TOKEN).safeTransferFrom( _msgSender(), address(this), _pairedLPTokens ); IERC20(PAIRED_LP_TOKEN).safeIncreaseAllowance(V2_ROUTER, _pairedLPTokens); IUniswapV2Router02(V2_ROUTER).addLiquidity( address(this), PAIRED_LP_TOKEN, _idxLPTokens, _pairedLPTokens, (_idxLPTokens * (1000 - _slippage)) / 1000, (_pairedLPTokens * (1000 - _slippage)) / 1000, _msgSender(), _deadline ); uint256 _remainingAllowance = IERC20(PAIRED_LP_TOKEN).allowance( address(this), V2_ROUTER ); if (_remainingAllowance > 0) { IERC20(PAIRED_LP_TOKEN).safeDecreaseAllowance( V2_ROUTER, _remainingAllowance ); } // check & refund excess tokens from LPing if (balanceOf(address(this)) > _idxTokensBefore) { super._transfer( address(this), _msgSender(), balanceOf(address(this)) - _idxTokensBefore ); } if (IERC20(PAIRED_LP_TOKEN).balanceOf(address(this)) > _pairedBefore) { IERC20(PAIRED_LP_TOKEN).safeTransfer( _msgSender(), IERC20(PAIRED_LP_TOKEN).balanceOf(address(this)) - _pairedBefore ); } emit AddLiquidity(_msgSender(), _idxLPTokens, _pairedLPTokens); } function removeLiquidityV2( uint256 _lpTokens, uint256 _minIdxTokens, // 0 == 100% slippage uint256 _minPairedLpToken, // 0 == 100% slippage uint256 _deadline ) external override lock noSwapOrFee { _lpTokens = _lpTokens == 0 ? IERC20(V2_POOL).balanceOf(_msgSender()) : _lpTokens; require(_lpTokens > 0, 'LPREM'); IERC20(V2_POOL).safeTransferFrom(_msgSender(), address(this), _lpTokens); IERC20(V2_POOL).safeIncreaseAllowance(V2_ROUTER, _lpTokens); IUniswapV2Router02(V2_ROUTER).removeLiquidity( address(this), PAIRED_LP_TOKEN, _lpTokens, _minIdxTokens, _minPairedLpToken, _msgSender(), _deadline ); emit RemoveLiquidity(_msgSender(), _lpTokens); } function flash( address _recipient, address _token, uint256 _amount, bytes calldata _data ) external override lock { require(_isTokenInIndex[_token], 'ONLYPODTKN'); uint256 _amountDAI = FLASH_FEE * 10 ** IERC20Metadata(DAI).decimals(); address _rewards = StakingPoolToken(lpStakingPool).poolRewards(); address _feeRecipient = lpRewardsToken == DAI ? address(this) : PAIRED_LP_TOKEN == DAI ? _rewards : Ownable(address(V3_TWAP_UTILS)).owner(); IERC20(DAI).safeTransferFrom(_msgSender(), _feeRecipient, _amountDAI); if (lpRewardsToken == DAI) { IERC20(DAI).safeIncreaseAllowance(_rewards, _amountDAI); ITokenRewards(_rewards).depositRewards(_amountDAI); } uint256 _balance = IERC20(_token).balanceOf(address(this)); IERC20(_token).safeTransfer(_recipient, _amount); IFlashLoanRecipient(_recipient).callback(_data); require(IERC20(_token).balanceOf(address(this)) >= _balance, 'FLASHAFTER'); emit FlashLoan(_msgSender(), _recipient, _token, _amount); } function setPartner(address _partner) external onlyPartner { partner = _partner; } function setPartnerFee(uint256 _fee) external onlyPartner { require(_fee < fees.partner, 'LTCUR'); fees.partner = _fee; } function rescueERC20(address _token) external lock { // cannot withdraw tokens/assets that belong to the index require(!isAsset(_token) && _token != address(this), 'UNAVAILABLE'); IERC20(_token).safeTransfer( Ownable(address(V3_TWAP_UTILS)).owner(), IERC20(_token).balanceOf(address(this)) ); } function rescueETH() external lock { require(address(this).balance > 0, 'NOETH'); (bool _sent, ) = Ownable(address(V3_TWAP_UTILS)).owner().call{ value: address(this).balance }(''); require(_sent, 'SENT'); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.19; import '@openzeppelin/contracts/token/ERC20/IERC20.sol'; interface IDecentralizedIndex is IERC20 { enum IndexType { WEIGHTED, UNWEIGHTED } // all fees: 1 == 0.01%, 10 == 0.1%, 100 == 1% struct Fees { uint256 burn; uint256 bond; uint256 debond; uint256 buy; uint256 sell; uint256 partner; } struct IndexAssetInfo { address token; uint256 weighting; uint256 basePriceUSDX96; address c1; // arbitrary contract/address field we can use for an index uint256 q1; // arbitrary quantity/number field we can use for an index } event Create(address indexed newIdx, address indexed wallet); event Bond( address indexed wallet, address indexed token, uint256 amountTokensBonded, uint256 amountTokensMinted ); event Debond(address indexed wallet, uint256 amountDebonded); event AddLiquidity( address indexed wallet, uint256 amountTokens, uint256 amountDAI ); event RemoveLiquidity(address indexed wallet, uint256 amountLiquidity); function BOND_FEE() external view returns (uint256); function DEBOND_FEE() external view returns (uint256); function FLASH_FEE() external view returns (uint256); function PAIRED_LP_TOKEN() external view returns (address); function indexType() external view returns (IndexType); function created() external view returns (uint256); function lpStakingPool() external view returns (address); function lpRewardsToken() external view returns (address); function partner() external view returns (address); function getIdxPriceUSDX96() external view returns (uint256, uint256); function isAsset(address token) external view returns (bool); function getAllAssets() external view returns (IndexAssetInfo[] memory); function getInitialAmount( address sToken, uint256 sAmount, address tToken ) external view returns (uint256); function getTokenPriceUSDX96(address token) external view returns (uint256); function processPreSwapFeesAndSwap() external; function bond(address token, uint256 amount, uint256 amountMintMin) external; function debond( uint256 amount, address[] memory token, uint8[] memory percentage ) external; function addLiquidityV2( uint256 idxTokens, uint256 daiTokens, uint256 slippage, uint256 deadline ) external; function removeLiquidityV2( uint256 lpTokens, uint256 minTokens, uint256 minDAI, uint256 deadline ) external; function flash( address recipient, address token, uint256 amount, bytes calldata data ) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.19; interface IFlashLoanRecipient { function callback(bytes calldata data) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.19; import '@openzeppelin/contracts/token/ERC20/IERC20.sol'; interface IPEAS is IERC20 { event Burn(address indexed user, uint256 amount); function burn(uint256 amount) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.19; import './IProtocolFees.sol'; interface IProtocolFeeRouter { function protocolFees() external view returns (IProtocolFees); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.19; interface IProtocolFees { event SetYieldAdmin(uint256 newFee); event SetYieldBurn(uint256 newFee); function DEN() external view returns (uint256); function yieldAdmin() external view returns (uint256); function yieldBurn() external view returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.19; interface IStakingPoolToken { event Stake(address indexed executor, address indexed user, uint256 amount); event Unstake(address indexed user, uint256 amount); function indexFund() external view returns (address); function stakingToken() external view returns (address); function poolRewards() external view returns (address); function stakeUserRestriction() external view returns (address); function stake(address user, uint256 amount) external; function unstake(uint256 amount) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.19; interface ITokenRewards { event AddShares(address indexed wallet, uint256 amount); event RemoveShares(address indexed wallet, uint256 amount); event ClaimReward(address indexed wallet); event DistributeReward(address indexed wallet, uint256 amount); event DepositRewards(address indexed wallet, uint256 amount); function totalShares() external view returns (uint256); function totalStakers() external view returns (uint256); function rewardsToken() external view returns (address); function trackingToken() external view returns (address); function depositFromPairedLpToken( uint256 amount, uint256 slippageOverride ) external; function depositRewards(uint256 amount) external; function claimReward(address wallet) external; function setShares( address wallet, uint256 amount, bool sharesRemoving ) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.19; interface IUniswapV2Factory { function createPair( address tokenA, address tokenB ) external returns (address pair); function getPair( address tokenA, address tokenB ) external view returns (address pair); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.19; interface IUniswapV2Pair { function token0() external view returns (address); function token1() external view returns (address); function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.19; interface IUniswapV2Router02 { function factory() external view returns (address); function WETH() external view returns (address); function addLiquidity( address tokenA, address tokenB, uint amountADesired, uint amountBDesired, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB, uint liquidity); function removeLiquidity( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB); function swapETHForExactTokens( uint256 amountOut, address[] calldata path, address to, uint256 deadline ) external payable returns (uint256[] memory amounts); function swapExactTokensForTokensSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.19; interface IV3TwapUtilities { function getV3Pool( address v3Factory, address token0, address token1, uint24 poolFee ) external view returns (address); function getPoolPriceUSDX96( address pricePool, address nativeStablePool, address WETH9 ) external view returns (uint256); function sqrtPriceX96FromPoolAndInterval( address pool ) external view returns (uint160); function priceX96FromSqrtPriceX96( uint160 sqrtPriceX96 ) external pure returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.19; // ---------------------------------------------------------------------------- // BokkyPooBah's DateTime Library v1.00 // // A gas-efficient Solidity date and time library // // https://github.com/bokkypoobah/BokkyPooBahsDateTimeLibrary // // Tested date range 1970/01/01 to 2345/12/31 // // Conventions: // Unit | Range | Notes // :-------- |:-------------:|:----- // timestamp | >= 0 | Unix timestamp, number of seconds since 1970/01/01 00:00:00 UTC // year | 1970 ... 2345 | // month | 1 ... 12 | // day | 1 ... 31 | // hour | 0 ... 23 | // minute | 0 ... 59 | // second | 0 ... 59 | // dayOfWeek | 1 ... 7 | 1 = Monday, ..., 7 = Sunday // // // Enjoy. (c) BokkyPooBah / Bok Consulting Pty Ltd 2018. // // GNU Lesser General Public License 3.0 // https://www.gnu.org/licenses/lgpl-3.0.en.html // ---------------------------------------------------------------------------- library BokkyPooBahsDateTimeLibrary { uint constant SECONDS_PER_DAY = 24 * 60 * 60; int constant OFFSET19700101 = 2440588; // ------------------------------------------------------------------------ // Calculate year/month/day from the number of days since 1970/01/01 using // the date conversion algorithm from // http://aa.usno.navy.mil/faq/docs/JD_Formula.php // and adding the offset 2440588 so that 1970/01/01 is day 0 // // int L = days + 68569 + offset // int N = 4 * L / 146097 // L = L - (146097 * N + 3) / 4 // year = 4000 * (L + 1) / 1461001 // L = L - 1461 * year / 4 + 31 // month = 80 * L / 2447 // dd = L - 2447 * month / 80 // L = month / 11 // month = month + 2 - 12 * L // year = 100 * (N - 49) + year + L // ------------------------------------------------------------------------ function _daysToDate( uint _days ) internal pure returns (uint year, uint month, uint day) { int __days = int(_days); int L = __days + 68569 + OFFSET19700101; int N = (4 * L) / 146097; L = L - (146097 * N + 3) / 4; int _year = (4000 * (L + 1)) / 1461001; L = L - (1461 * _year) / 4 + 31; int _month = (80 * L) / 2447; int _day = L - (2447 * _month) / 80; L = _month / 11; _month = _month + 2 - 12 * L; _year = 100 * (N - 49) + _year + L; year = uint(_year); month = uint(_month); day = uint(_day); } function timestampToDate( uint timestamp ) internal pure returns (uint year, uint month, uint day) { (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); } }
// SPDX-License-Identifier: GPL-2.0-or-later pragma solidity >=0.5.0; /// @title Provides functions for deriving a pool address from the factory, tokens, and the fee library PoolAddress { bytes32 internal constant POOL_INIT_CODE_HASH = 0xe34f199b19b2b4f47f68442619d555527d244f78a3297ea89325f843f87b8b54; /// @notice The identifying key of the pool struct PoolKey { address token0; address token1; uint24 fee; } /// @notice Returns PoolKey: the ordered tokens with the matched fee levels /// @param tokenA The first token of a pool, unsorted /// @param tokenB The second token of a pool, unsorted /// @param fee The fee level of the pool /// @return Poolkey The pool details with ordered token0 and token1 assignments function getPoolKey( address tokenA, address tokenB, uint24 fee ) internal pure returns (PoolKey memory) { if (tokenA > tokenB) (tokenA, tokenB) = (tokenB, tokenA); return PoolKey({ token0: tokenA, token1: tokenB, fee: fee }); } /// @notice Deterministically computes the pool address given the factory and PoolKey /// @param factory The Uniswap V3 factory contract address /// @param key The PoolKey /// @return pool The contract address of the V3 pool function computeAddress( address factory, PoolKey memory key ) internal pure returns (address pool) { require(key.token0 < key.token1); pool = address( uint160( uint256( keccak256( abi.encodePacked( hex'ff', factory, keccak256(abi.encode(key.token0, key.token1, key.fee)), POOL_INIT_CODE_HASH ) ) ) ) ); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.19; import '@openzeppelin/contracts/token/ERC20/ERC20.sol'; import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol'; import './interfaces/IProtocolFeeRouter.sol'; import './interfaces/IStakingPoolToken.sol'; import './TokenRewards.sol'; contract StakingPoolToken is IStakingPoolToken, ERC20 { using SafeERC20 for IERC20; address public immutable override indexFund; address public immutable override stakingToken; address public immutable override poolRewards; address public override stakeUserRestriction; modifier onlyRestricted() { require(_msgSender() == stakeUserRestriction, 'RESUSERAUTH'); _; } constructor( string memory _name, string memory _symbol, address _pairedLpToken, address _stakingToken, address _rewardsToken, address _stakeUserRestriction, IProtocolFeeRouter _feeRouter, IV3TwapUtilities _v3TwapUtilities ) ERC20(_name, _symbol) { indexFund = _msgSender(); stakingToken = _stakingToken; stakeUserRestriction = _stakeUserRestriction; poolRewards = address( new TokenRewards( _feeRouter, _v3TwapUtilities, indexFund, _pairedLpToken, address(this), _rewardsToken ) ); } function stake(address _user, uint256 _amount) external override { if (stakeUserRestriction != address(0)) { require(_user == stakeUserRestriction, 'RESTRICT'); } _mint(_user, _amount); IERC20(stakingToken).safeTransferFrom(_msgSender(), address(this), _amount); emit Stake(_msgSender(), _user, _amount); } function unstake(uint256 _amount) external override { _burn(_msgSender(), _amount); IERC20(stakingToken).safeTransfer(_msgSender(), _amount); emit Unstake(_msgSender(), _amount); } function removeStakeUserRestriction() external onlyRestricted { stakeUserRestriction = address(0); } function setStakeUserRestriction(address _user) external onlyRestricted { stakeUserRestriction = _user; } function _afterTokenTransfer( address _from, address _to, uint256 _amount ) internal override { if (_from != address(0) && _from != address(0xdead)) { TokenRewards(poolRewards).setShares(_from, _amount, true); } if (_to != address(0) && _to != address(0xdead)) { TokenRewards(poolRewards).setShares(_to, _amount, false); } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.19; import '@openzeppelin/contracts/access/Ownable.sol'; import '@openzeppelin/contracts/token/ERC20/IERC20.sol'; import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol'; import '@openzeppelin/contracts/utils/Context.sol'; import '@uniswap/v3-core/contracts/libraries/FixedPoint96.sol'; import '@uniswap/v3-periphery/contracts/interfaces/ISwapRouter.sol'; import '@uniswap/v3-periphery/contracts/interfaces/IPeripheryImmutableState.sol'; import './interfaces/IDecentralizedIndex.sol'; import './interfaces/IPEAS.sol'; import './interfaces/IProtocolFees.sol'; import './interfaces/IProtocolFeeRouter.sol'; import './interfaces/ITokenRewards.sol'; import './interfaces/IV3TwapUtilities.sol'; import './interfaces/IUniswapV2Router02.sol'; import './libraries/BokkyPooBahsDateTimeLibrary.sol'; import './libraries/PoolAddress.sol'; contract TokenRewards is ITokenRewards, Context { using SafeERC20 for IERC20; address constant V3_ROUTER = 0xE592427A0AEce92De3Edee1F18E0157C05861564; uint256 constant PRECISION = 10 ** 36; uint24 constant REWARDS_POOL_FEE = 10000; // 1% address immutable INDEX_FUND; address immutable PAIRED_LP_TOKEN; IProtocolFeeRouter immutable PROTOCOL_FEE_ROUTER; IV3TwapUtilities immutable V3_TWAP_UTILS; struct Reward { uint256 excluded; uint256 realized; } address public immutable override trackingToken; address public immutable override rewardsToken; uint256 public override totalShares; uint256 public override totalStakers; mapping(address => uint256) public shares; mapping(address => Reward) public rewards; uint256 _rewardsSwapSlippage = 10; // 1% uint256 _rewardsPerShare; uint256 public rewardsDistributed; uint256 public rewardsDeposited; mapping(uint256 => uint256) public rewardsDepMonthly; modifier onlyTrackingToken() { require(_msgSender() == trackingToken, 'UNAUTHORIZED'); _; } constructor( IProtocolFeeRouter _feeRouter, IV3TwapUtilities _v3TwapUtilities, address _indexFund, address _pairedLpToken, address _trackingToken, address _rewardsToken ) { PROTOCOL_FEE_ROUTER = _feeRouter; V3_TWAP_UTILS = _v3TwapUtilities; INDEX_FUND = _indexFund; PAIRED_LP_TOKEN = _pairedLpToken; trackingToken = _trackingToken; rewardsToken = _rewardsToken; } function setShares( address _wallet, uint256 _amount, bool _sharesRemoving ) external override onlyTrackingToken { _setShares(_wallet, _amount, _sharesRemoving); } function _setShares( address _wallet, uint256 _amount, bool _sharesRemoving ) internal { _processFeesIfApplicable(); if (_sharesRemoving) { _removeShares(_wallet, _amount); emit RemoveShares(_wallet, _amount); } else { _addShares(_wallet, _amount); emit AddShares(_wallet, _amount); } } function _addShares(address _wallet, uint256 _amount) internal { if (shares[_wallet] > 0) { _distributeReward(_wallet); } uint256 sharesBefore = shares[_wallet]; totalShares += _amount; shares[_wallet] += _amount; if (sharesBefore == 0 && shares[_wallet] > 0) { totalStakers++; } rewards[_wallet].excluded = _cumulativeRewards(shares[_wallet]); } function _removeShares(address _wallet, uint256 _amount) internal { require(shares[_wallet] > 0 && _amount <= shares[_wallet], 'REMOVE'); _distributeReward(_wallet); totalShares -= _amount; shares[_wallet] -= _amount; if (shares[_wallet] == 0) { totalStakers--; } rewards[_wallet].excluded = _cumulativeRewards(shares[_wallet]); } function _processFeesIfApplicable() internal { IDecentralizedIndex(INDEX_FUND).processPreSwapFeesAndSwap(); if ( rewardsToken != PAIRED_LP_TOKEN && IERC20(PAIRED_LP_TOKEN).balanceOf(address(this)) > 0 ) { depositFromPairedLpToken(0, 0); } } function depositFromPairedLpToken( uint256 _amountTknDepositing, uint256 _slippageOverride ) public override { require(PAIRED_LP_TOKEN != rewardsToken, 'LPREWSAME'); if (_amountTknDepositing > 0) { IERC20(PAIRED_LP_TOKEN).safeTransferFrom( _msgSender(), address(this), _amountTknDepositing ); } uint256 _amountTkn = IERC20(PAIRED_LP_TOKEN).balanceOf(address(this)); require(_amountTkn > 0, 'NEEDTKN'); uint256 _adminAmt; (uint256 _yieldAdminFee, ) = _getYieldFees(); if (_yieldAdminFee > 0) { _adminAmt = (_amountTkn * _yieldAdminFee) / PROTOCOL_FEE_ROUTER.protocolFees().DEN(); _amountTkn -= _adminAmt; } (address _token0, address _token1) = PAIRED_LP_TOKEN < rewardsToken ? (PAIRED_LP_TOKEN, rewardsToken) : (rewardsToken, PAIRED_LP_TOKEN); PoolAddress.PoolKey memory _poolKey = PoolAddress.PoolKey({ token0: _token0, token1: _token1, fee: REWARDS_POOL_FEE }); address _pool = PoolAddress.computeAddress( IPeripheryImmutableState(V3_ROUTER).factory(), _poolKey ); uint160 _rewardsSqrtPriceX96 = V3_TWAP_UTILS .sqrtPriceX96FromPoolAndInterval(_pool); uint256 _rewardsPriceX96 = V3_TWAP_UTILS.priceX96FromSqrtPriceX96( _rewardsSqrtPriceX96 ); uint256 _amountOut = _token0 == PAIRED_LP_TOKEN ? (_rewardsPriceX96 * _amountTkn) / FixedPoint96.Q96 : (_amountTkn * FixedPoint96.Q96) / _rewardsPriceX96; uint256 _rewardsBalBefore = IERC20(rewardsToken).balanceOf(address(this)); IERC20(PAIRED_LP_TOKEN).safeIncreaseAllowance(V3_ROUTER, _amountTkn); uint256 _slippage = _slippageOverride > 0 ? _slippageOverride : _rewardsSwapSlippage; try ISwapRouter(V3_ROUTER).exactInputSingle( ISwapRouter.ExactInputSingleParams({ tokenIn: PAIRED_LP_TOKEN, tokenOut: rewardsToken, fee: REWARDS_POOL_FEE, recipient: address(this), deadline: block.timestamp, amountIn: _amountTkn, amountOutMinimum: (_amountOut * (1000 - _slippage)) / 1000, sqrtPriceLimitX96: 0 }) ) { if (_adminAmt > 0) { IERC20(PAIRED_LP_TOKEN).safeTransfer( Ownable(address(V3_TWAP_UTILS)).owner(), _adminAmt ); } _rewardsSwapSlippage = 10; _depositRewards( IERC20(rewardsToken).balanceOf(address(this)) - _rewardsBalBefore ); } catch { if (_rewardsSwapSlippage < 500) { _rewardsSwapSlippage += 10; } IERC20(PAIRED_LP_TOKEN).safeDecreaseAllowance(V3_ROUTER, _amountTkn); } } function depositRewards(uint256 _amount) external override { require(_amount > 0, 'DEPAM'); uint256 _rewardsBalBefore = IERC20(rewardsToken).balanceOf(address(this)); IERC20(rewardsToken).safeTransferFrom(_msgSender(), address(this), _amount); _depositRewards( IERC20(rewardsToken).balanceOf(address(this)) - _rewardsBalBefore ); } function _depositRewards(uint256 _amountTotal) internal { if (_amountTotal == 0) { return; } if (totalShares == 0) { _burnRewards(_amountTotal); return; } uint256 _depositAmount = _amountTotal; (, uint256 _yieldBurnFee) = _getYieldFees(); if (_yieldBurnFee > 0) { uint256 _burnAmount = (_amountTotal * _yieldBurnFee) / PROTOCOL_FEE_ROUTER.protocolFees().DEN(); if (_burnAmount > 0) { _burnRewards(_burnAmount); _depositAmount -= _burnAmount; } } rewardsDeposited += _depositAmount; rewardsDepMonthly[beginningOfMonth(block.timestamp)] += _depositAmount; _rewardsPerShare += (PRECISION * _depositAmount) / totalShares; emit DepositRewards(_msgSender(), _depositAmount); } function _distributeReward(address _wallet) internal { if (shares[_wallet] == 0) { return; } uint256 _amount = getUnpaid(_wallet); rewards[_wallet].realized += _amount; rewards[_wallet].excluded = _cumulativeRewards(shares[_wallet]); if (_amount > 0) { rewardsDistributed += _amount; IERC20(rewardsToken).safeTransfer(_wallet, _amount); emit DistributeReward(_wallet, _amount); } } function _burnRewards(uint256 _burnAmount) internal { try IPEAS(rewardsToken).burn(_burnAmount) {} catch { IERC20(rewardsToken).safeTransfer(address(0xdead), _burnAmount); } } function _getYieldFees() internal view returns (uint256 _admin, uint256 _burn) { IProtocolFees _fees = PROTOCOL_FEE_ROUTER.protocolFees(); if (address(_fees) != address(0)) { _admin = _fees.yieldAdmin(); _burn = _fees.yieldBurn(); } } function beginningOfMonth(uint256 _timestamp) public pure returns (uint256) { (, , uint256 _dayOfMonth) = BokkyPooBahsDateTimeLibrary.timestampToDate( _timestamp ); return _timestamp - ((_dayOfMonth - 1) * 1 days) - (_timestamp % 1 days); } function claimReward(address _wallet) external override { _distributeReward(_wallet); emit ClaimReward(_wallet); } function getUnpaid(address _wallet) public view returns (uint256) { if (shares[_wallet] == 0) { return 0; } uint256 earnedRewards = _cumulativeRewards(shares[_wallet]); uint256 rewardsExcluded = rewards[_wallet].excluded; if (earnedRewards <= rewardsExcluded) { return 0; } return earnedRewards - rewardsExcluded; } function _cumulativeRewards(uint256 _share) internal view returns (uint256) { return (_share * _rewardsPerShare) / PRECISION; } }
{ "metadata": { "bytecodeHash": "none" }, "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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IDecentralizedIndex.IndexType","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"}],"name":"isAsset","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lpRewardsToken","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lpStakingPool","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"partner","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":[],"name":"processPreSwapFeesAndSwap","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_lpTokens","type":"uint256"},{"internalType":"uint256","name":"_minIdxTokens","type":"uint256"},{"internalType":"uint256","name":"_minPairedLpToken","type":"uint256"},{"internalType":"uint256","name":"_deadline","type":"uint256"}],"name":"removeLiquidityV2","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"}],"name":"rescueERC20","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"rescueETH","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_partner","type":"address"}],"name":"setPartner","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_fee","type":"uint256"}],"name":"setPartnerFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"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"}]
Contract Creation Code
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