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TokenTracker
Latest 25 from a total of 40 transactions
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Approve | 20520904 | 32 days ago | IN | 0 ETH | 0.00028279 | ||||
Approve | 20019995 | 102 days ago | IN | 0 ETH | 0.00075726 | ||||
Transfer | 19786996 | 135 days ago | IN | 0 ETH | 0.00150213 | ||||
Transfer | 19784220 | 135 days ago | IN | 0 ETH | 0.00040118 | ||||
Transfer | 19784191 | 135 days ago | IN | 0 ETH | 0.00096271 | ||||
Transfer | 19784184 | 135 days ago | IN | 0 ETH | 0.00096271 | ||||
Transfer | 19784179 | 135 days ago | IN | 0 ETH | 0.00035981 | ||||
Transfer | 19784171 | 135 days ago | IN | 0 ETH | 0.00115525 | ||||
Transfer | 19784146 | 135 days ago | IN | 0 ETH | 0.00096271 | ||||
Approve | 19726012 | 143 days ago | IN | 0 ETH | 0.00125005 | ||||
Approve | 19726006 | 143 days ago | IN | 0 ETH | 0.00127956 | ||||
Approve | 19725999 | 143 days ago | IN | 0 ETH | 0.0016538 | ||||
Approve | 19722081 | 144 days ago | IN | 0 ETH | 0.00066094 | ||||
Approve | 19721448 | 144 days ago | IN | 0 ETH | 0.00039141 | ||||
Approve | 19721441 | 144 days ago | IN | 0 ETH | 0.00051526 | ||||
Approve | 19721438 | 144 days ago | IN | 0 ETH | 0.00048921 | ||||
Approve | 19721435 | 144 days ago | IN | 0 ETH | 0.00050506 | ||||
Approve | 19721432 | 144 days ago | IN | 0 ETH | 0.00051997 | ||||
Approve | 19721431 | 144 days ago | IN | 0 ETH | 0.00049611 | ||||
Approve | 19721431 | 144 days ago | IN | 0 ETH | 0.00049611 | ||||
Approve | 19721431 | 144 days ago | IN | 0 ETH | 0.00286506 | ||||
Approve | 19721429 | 144 days ago | IN | 0 ETH | 0.00059977 | ||||
Approve | 19721429 | 144 days ago | IN | 0 ETH | 0.00106427 | ||||
Approve | 19721429 | 144 days ago | IN | 0 ETH | 0.00176102 | ||||
Approve | 19721429 | 144 days ago | IN | 0 ETH | 0.00176102 |
Latest 2 internal transactions
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Parent Transaction Hash | Block | From | To | |||
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19707153 | 146 days ago | Contract Creation | 0 ETH | |||
19707153 | 146 days ago | Contract Creation | 0 ETH |
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Contract Source Code Verified (Exact Match)
Contract Name:
BaseERC404
Compiler Version
v0.8.23+commit.f704f362
Optimization Enabled:
Yes with 200 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.8.23; import {DN404} from "@vectorized/DN404.sol"; import {DN404Mirror} from "@vectorized/DN404Mirror.sol"; import {Strings} from "@openzeppelin/contracts/utils/Strings.sol"; import {BaseToken, IUniswapV2Router02, IERC20} from "../BaseToken.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import {IUniswapV2Factory} from "@uniswap-core/interfaces/IUniswapV2Factory.sol"; /// @title BaseERC404 /// @notice A standard ERC404 token contract BaseERC404 is DN404, BaseToken { string private _name; string private _symbol; string private _baseURI; IUniswapV2Router02 public router; address public pair; address tokenFactory; uint256 private tokenLiquidityThreshold; constructor( IERC20 _wnt, IUniswapV2Router02 _univ2router, address _treasury, string memory name_, string memory symbol_, string memory baseURI_, uint96 _totalSupply, uint256 _tokenLiquidityThreshold, IUniswapV2Factory univ2factory ) BaseToken(_wnt, _univ2router, _treasury) { _name = name_; _symbol = symbol_; _baseURI = baseURI_; _initializeDN404( _totalSupply, // initialTokenSupply msg.sender, // initialSupplyOwner, TokenFactory address(new DN404Mirror(address(0))) // Mirror ); tokenFactory = msg.sender; pair = univ2factory.createPair(address(this), address(_wnt)); router = _univ2router; tokenLiquidityThreshold = _tokenLiquidityThreshold; _approve(address(this), address(router), type(uint256).max); } function name() public view override returns (string memory) { return _name; } function symbol() public view override returns (string memory) { return _symbol; } function tokenURI( uint256 _tokenId ) public view override returns (string memory _result) { if (bytes(_baseURI).length != 0) _result = string( abi.encodePacked(_baseURI, Strings.toString(_tokenId)) ); } function _transfer( address from, address to, uint256 value ) internal override { require(value > 0, "Transfer amount must be greater than zero"); uint256 fee = 0; if (to == pair || from == pair) { if (!(to == address(this) || from == address(this))) { if (from != tokenFactory) { fee = ((value * SWAP_TAX) / PRECISION); handle_fees(); } } } super._transfer(from, to, value - fee); if (fee > 0) { super._transfer(from, address(this), fee); } } function handle_fees() private { uint256 contractBalance = balanceOf(address(this)); if (contractBalance >= tokenLiquidityThreshold) { swapTokensForETH(contractBalance); } } function swapTokensForETH(uint256 tokenAmount) private { address[] memory path = new address[](2); path[0] = address(this); path[1] = router.WETH(); router.swapExactTokensForETHSupportingFeeOnTransferTokens( tokenAmount, 0, path, treasury, block.timestamp ); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; /// @title DN404 /// @notice DN404 is a hybrid ERC20 and ERC721 implementation that mints /// and burns NFTs based on an account's ERC20 token balance. /// /// @author vectorized.eth (@optimizoor) /// @author Quit (@0xQuit) /// @author Michael Amadi (@AmadiMichaels) /// @author cygaar (@0xCygaar) /// @author Thomas (@0xjustadev) /// @author Harrison (@PopPunkOnChain) /// /// @dev Note: /// - The ERC721 data is stored in this base DN404 contract, however a /// DN404Mirror contract ***MUST*** be deployed and linked during /// initialization. abstract contract DN404 { /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* EVENTS */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Emitted when `amount` tokens is transferred from `from` to `to`. event Transfer(address indexed from, address indexed to, uint256 amount); /// @dev Emitted when `amount` tokens is approved by `owner` to be used by `spender`. event Approval(address indexed owner, address indexed spender, uint256 amount); /// @dev Emitted when `target` sets their skipNFT flag to `status`. event SkipNFTSet(address indexed target, bool status); /// @dev `keccak256(bytes("Transfer(address,address,uint256)"))`. uint256 private constant _TRANSFER_EVENT_SIGNATURE = 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef; /// @dev `keccak256(bytes("Approval(address,address,uint256)"))`. uint256 private constant _APPROVAL_EVENT_SIGNATURE = 0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925; /// @dev `keccak256(bytes("SkipNFTSet(address,bool)"))`. uint256 private constant _SKIP_NFT_SET_EVENT_SIGNATURE = 0xb5a1de456fff688115a4f75380060c23c8532d14ff85f687cc871456d6420393; /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* CUSTOM ERRORS */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Thrown when attempting to double-initialize the contract. error DNAlreadyInitialized(); /// @dev Thrown when attempting to transfer or burn more tokens than sender's balance. error InsufficientBalance(); /// @dev Thrown when a spender attempts to transfer tokens with an insufficient allowance. error InsufficientAllowance(); /// @dev Thrown when minting an amount of tokens that would overflow the max tokens. error TotalSupplyOverflow(); /// @dev The unit cannot be zero. error UnitIsZero(); /// @dev Thrown when the caller for a fallback NFT function is not the mirror contract. error SenderNotMirror(); /// @dev Thrown when attempting to transfer tokens to the zero address. error TransferToZeroAddress(); /// @dev Thrown when the mirror address provided for initialization is the zero address. error MirrorAddressIsZero(); /// @dev Thrown when the link call to the mirror contract reverts. error LinkMirrorContractFailed(); /// @dev Thrown when setting an NFT token approval /// and the caller is not the owner or an approved operator. error ApprovalCallerNotOwnerNorApproved(); /// @dev Thrown when transferring an NFT /// and the caller is not the owner or an approved operator. error TransferCallerNotOwnerNorApproved(); /// @dev Thrown when transferring an NFT and the from address is not the current owner. error TransferFromIncorrectOwner(); /// @dev Thrown when checking the owner or approved address for a non-existent NFT. error TokenDoesNotExist(); /// @dev The function selector is not recognized. error FnSelectorNotRecognized(); /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* CONSTANTS */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev The flag to denote that the address data is initialized. uint8 internal constant _ADDRESS_DATA_INITIALIZED_FLAG = 1 << 0; /// @dev The flag to denote that the address should skip NFTs. uint8 internal constant _ADDRESS_DATA_SKIP_NFT_FLAG = 1 << 1; /// @dev The flag to denote that the address has overridden the default Permit2 allowance. uint8 internal constant _ADDRESS_DATA_OVERRIDE_PERMIT2_FLAG = 1 << 2; /// @dev The canonical Permit2 address. /// For signature-based allowance granting for single transaction ERC20 `transferFrom`. /// To enable, override `_givePermit2DefaultInfiniteAllowance()`. /// [Github](https://github.com/Uniswap/permit2) /// [Etherscan](https://etherscan.io/address/0x000000000022D473030F116dDEE9F6B43aC78BA3) address internal constant _PERMIT2 = 0x000000000022D473030F116dDEE9F6B43aC78BA3; /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* STORAGE */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Struct containing an address's token data and settings. struct AddressData { // Auxiliary data. uint88 aux; // Flags for `initialized` and `skipNFT`. uint8 flags; // The alias for the address. Zero means absence of an alias. uint32 addressAlias; // The number of NFT tokens. uint32 ownedLength; // The token balance in wei. uint96 balance; } /// @dev A uint32 map in storage. struct Uint32Map { uint256 spacer; } /// @dev A bitmap in storage. struct Bitmap { uint256 spacer; } /// @dev A struct to wrap a uint256 in storage. struct Uint256Ref { uint256 value; } /// @dev A mapping of an address pair to a Uint256Ref. struct AddressPairToUint256RefMap { uint256 spacer; } /// @dev Struct containing the base token contract storage. struct DN404Storage { // Current number of address aliases assigned. uint32 numAliases; // Next NFT ID to assign for a mint. uint32 nextTokenId; // The head of the burned pool. uint32 burnedPoolHead; // The tail of the burned pool. uint32 burnedPoolTail; // Total number of NFTs in existence. uint32 totalNFTSupply; // Total supply of tokens. uint96 totalSupply; // Address of the NFT mirror contract. address mirrorERC721; // Mapping of a user alias number to their address. mapping(uint32 => address) aliasToAddress; // Mapping of user operator approvals for NFTs. AddressPairToUint256RefMap operatorApprovals; // Mapping of NFT approvals to approved operators. mapping(uint256 => address) nftApprovals; // Bitmap of whether an non-zero NFT approval may exist. Bitmap mayHaveNFTApproval; // Bitmap of whether a NFT ID exists. Ignored if `_useExistsLookup()` returns false. Bitmap exists; // Mapping of user allowances for ERC20 spenders. AddressPairToUint256RefMap allowance; // Mapping of NFT IDs owned by an address. mapping(address => Uint32Map) owned; // The pool of burned NFT IDs. Uint32Map burnedPool; // Even indices: owner aliases. Odd indices: owned indices. Uint32Map oo; // Mapping of user account AddressData. mapping(address => AddressData) addressData; } /// @dev Returns a storage pointer for DN404Storage. function _getDN404Storage() internal pure virtual returns (DN404Storage storage $) { /// @solidity memory-safe-assembly assembly { // `uint72(bytes9(keccak256("DN404_STORAGE")))`. $.slot := 0xa20d6e21d0e5255308 // Truncate to 9 bytes to reduce bytecode size. } } /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* INITIALIZER */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Initializes the DN404 contract with an /// `initialTokenSupply`, `initialTokenOwner` and `mirror` NFT contract address. function _initializeDN404( uint256 initialTokenSupply, address initialSupplyOwner, address mirror ) internal virtual { DN404Storage storage $ = _getDN404Storage(); if (_unit() == 0) revert UnitIsZero(); if ($.mirrorERC721 != address(0)) revert DNAlreadyInitialized(); if (mirror == address(0)) revert MirrorAddressIsZero(); /// @solidity memory-safe-assembly assembly { // Make the call to link the mirror contract. mstore(0x00, 0x0f4599e5) // `linkMirrorContract(address)`. mstore(0x20, caller()) if iszero(and(eq(mload(0x00), 1), call(gas(), mirror, 0, 0x1c, 0x24, 0x00, 0x20))) { mstore(0x00, 0xd125259c) // `LinkMirrorContractFailed()`. revert(0x1c, 0x04) } } $.nextTokenId = 1; $.mirrorERC721 = mirror; if (initialTokenSupply != 0) { if (initialSupplyOwner == address(0)) revert TransferToZeroAddress(); if (_totalSupplyOverflows(initialTokenSupply)) revert TotalSupplyOverflow(); $.totalSupply = uint96(initialTokenSupply); AddressData storage initialOwnerAddressData = _addressData(initialSupplyOwner); initialOwnerAddressData.balance = uint96(initialTokenSupply); /// @solidity memory-safe-assembly assembly { // Emit the {Transfer} event. mstore(0x00, initialTokenSupply) log3(0x00, 0x20, _TRANSFER_EVENT_SIGNATURE, 0, shr(96, shl(96, initialSupplyOwner))) } _setSkipNFT(initialSupplyOwner, true); } } /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* BASE UNIT FUNCTION TO OVERRIDE */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Amount of token balance that is equal to one NFT. function _unit() internal view virtual returns (uint256) { return 10 ** 18; } /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* METADATA FUNCTIONS TO OVERRIDE */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Returns the name of the token. function name() public view virtual returns (string memory); /// @dev Returns the symbol of the token. function symbol() public view virtual returns (string memory); /// @dev Returns the Uniform Resource Identifier (URI) for token `id`. function tokenURI(uint256 id) public view virtual returns (string memory); /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* CONFIGURABLES */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Returns if direct NFT transfers should be used during ERC20 transfers /// whenever possible, instead of burning and re-minting. function _useDirectTransfersIfPossible() internal view virtual returns (bool) { return true; } /// @dev Returns if burns should be added to the burn pool. /// This returns false by default, which means the NFT IDs are re-minted in a cycle. function _addToBurnedPool(uint256 totalNFTSupplyAfterBurn, uint256 totalSupplyAfterBurn) internal view virtual returns (bool) { // Silence unused variable compiler warning. totalSupplyAfterBurn = totalNFTSupplyAfterBurn; return false; } /// @dev Returns whether to use the exists bitmap for more efficient /// scanning of an empty token ID slot. /// Recommended for collections that do not use the burn pool, /// and are expected to have nearly all possible NFTs materialized. /// /// Note: The returned value must be constant after initialization. function _useExistsLookup() internal view virtual returns (bool) { return true; } /// @dev Hook that is called after any NFT token transfers, including minting and burning. function _afterNFTTransfer(address from, address to, uint256 id) internal virtual {} /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* ERC20 OPERATIONS */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Returns the decimals places of the token. Always 18. function decimals() public pure returns (uint8) { return 18; } /// @dev Returns the amount of tokens in existence. function totalSupply() public view virtual returns (uint256) { return uint256(_getDN404Storage().totalSupply); } /// @dev Returns the amount of tokens owned by `owner`. function balanceOf(address owner) public view virtual returns (uint256) { return _getDN404Storage().addressData[owner].balance; } /// @dev Returns the amount of tokens that `spender` can spend on behalf of `owner`. function allowance(address owner, address spender) public view returns (uint256) { if (_givePermit2DefaultInfiniteAllowance() && spender == _PERMIT2) { uint8 flags = _getDN404Storage().addressData[owner].flags; if (flags & _ADDRESS_DATA_OVERRIDE_PERMIT2_FLAG == 0) return type(uint256).max; } return _ref(_getDN404Storage().allowance, owner, spender).value; } /// @dev Sets `amount` as the allowance of `spender` over the caller's tokens. /// /// Emits a {Approval} event. function approve(address spender, uint256 amount) public virtual returns (bool) { _approve(msg.sender, spender, amount); return true; } /// @dev Transfer `amount` tokens from the caller to `to`. /// /// Will burn sender NFTs if balance after transfer is less than /// the amount required to support the current NFT balance. /// /// Will mint NFTs to `to` if the recipient's new balance supports /// additional NFTs ***AND*** the `to` address's skipNFT flag is /// set to false. /// /// Requirements: /// - `from` must at least have `amount`. /// /// Emits a {Transfer} event. function transfer(address to, uint256 amount) public virtual returns (bool) { _transfer(msg.sender, to, amount); return true; } /// @dev Transfers `amount` tokens from `from` to `to`. /// /// Note: Does not update the allowance if it is the maximum uint256 value. /// /// Will burn sender NFTs if balance after transfer is less than /// the amount required to support the current NFT balance. /// /// Will mint NFTs to `to` if the recipient's new balance supports /// additional NFTs ***AND*** the `to` address's skipNFT flag is /// set to false. /// /// Requirements: /// - `from` must at least have `amount`. /// - The caller must have at least `amount` of allowance to transfer the tokens of `from`. /// /// Emits a {Transfer} event. function transferFrom(address from, address to, uint256 amount) public virtual returns (bool) { Uint256Ref storage a = _ref(_getDN404Storage().allowance, from, msg.sender); uint256 allowed = _givePermit2DefaultInfiniteAllowance() && msg.sender == _PERMIT2 && (_getDN404Storage().addressData[from].flags & _ADDRESS_DATA_OVERRIDE_PERMIT2_FLAG) == 0 ? type(uint256).max : a.value; if (allowed != type(uint256).max) { if (amount > allowed) revert InsufficientAllowance(); unchecked { a.value = allowed - amount; } } _transfer(from, to, amount); return true; } /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* PERMIT2 */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Whether Permit2 has infinite allowances by default for all owners. /// For signature-based allowance granting for single transaction ERC20 `transferFrom`. /// To enable, override this function to return true. function _givePermit2DefaultInfiniteAllowance() internal view virtual returns (bool) { return false; } /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* INTERNAL MINT FUNCTIONS */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Mints `amount` tokens to `to`, increasing the total supply. /// /// Will mint NFTs to `to` if the recipient's new balance supports /// additional NFTs ***AND*** the `to` address's skipNFT flag is set to false. /// /// Emits a {Transfer} event. function _mint(address to, uint256 amount) internal virtual { if (to == address(0)) revert TransferToZeroAddress(); AddressData storage toAddressData = _addressData(to); DN404Storage storage $ = _getDN404Storage(); if ($.mirrorERC721 == address(0)) revert(); _DNMintTemps memory t; unchecked { uint256 toBalance = uint256(toAddressData.balance) + amount; toAddressData.balance = uint96(toBalance); t.toEnd = toBalance / _unit(); } uint256 maxId; unchecked { uint256 totalSupply_ = uint256($.totalSupply) + amount; $.totalSupply = uint96(totalSupply_); uint256 overflows = _toUint(_totalSupplyOverflows(totalSupply_)); if (overflows | _toUint(totalSupply_ < amount) != 0) revert TotalSupplyOverflow(); maxId = totalSupply_ / _unit(); } unchecked { if (toAddressData.flags & _ADDRESS_DATA_SKIP_NFT_FLAG == 0) { Uint32Map storage toOwned = $.owned[to]; Uint32Map storage oo = $.oo; uint256 toIndex = toAddressData.ownedLength; _DNPackedLogs memory packedLogs = _packedLogsMalloc(_zeroFloorSub(t.toEnd, toIndex)); if (packedLogs.logs.length != 0) { _packedLogsSet(packedLogs, to, 0); $.totalNFTSupply += uint32(packedLogs.logs.length); toAddressData.ownedLength = uint32(t.toEnd); t.toAlias = _registerAndResolveAlias(toAddressData, to); uint32 burnedPoolHead = $.burnedPoolHead; t.burnedPoolTail = $.burnedPoolTail; t.nextTokenId = _wrapNFTId($.nextTokenId, maxId); // Mint loop. do { uint256 id; if (burnedPoolHead != t.burnedPoolTail) { id = _get($.burnedPool, burnedPoolHead++); } else { id = t.nextTokenId; while (_get(oo, _ownershipIndex(id)) != 0) { id = _useExistsLookup() ? _wrapNFTId(_findFirstUnset($.exists, id + 1, maxId + 1), maxId) : _wrapNFTId(id + 1, maxId); } t.nextTokenId = _wrapNFTId(id + 1, maxId); } if (_useExistsLookup()) _set($.exists, id, true); _set(toOwned, toIndex, uint32(id)); _setOwnerAliasAndOwnedIndex(oo, id, t.toAlias, uint32(toIndex++)); _packedLogsAppend(packedLogs, id); _afterNFTTransfer(address(0), to, id); } while (toIndex != t.toEnd); $.nextTokenId = uint32(t.nextTokenId); $.burnedPoolHead = burnedPoolHead; _packedLogsSend(packedLogs, $.mirrorERC721); } } } /// @solidity memory-safe-assembly assembly { // Emit the {Transfer} event. mstore(0x00, amount) log3(0x00, 0x20, _TRANSFER_EVENT_SIGNATURE, 0, shr(96, shl(96, to))) } } /// @dev Mints `amount` tokens to `to`, increasing the total supply. /// This variant mints NFT tokens starting from ID `preTotalSupply / _unit() + 1`. /// This variant will not touch the `burnedPool` and `nextTokenId`. /// /// Will mint NFTs to `to` if the recipient's new balance supports /// additional NFTs ***AND*** the `to` address's skipNFT flag is set to false. /// /// Emits a {Transfer} event. function _mintNext(address to, uint256 amount) internal virtual { if (to == address(0)) revert TransferToZeroAddress(); AddressData storage toAddressData = _addressData(to); DN404Storage storage $ = _getDN404Storage(); if ($.mirrorERC721 == address(0)) revert(); _DNMintTemps memory t; unchecked { uint256 toBalance = uint256(toAddressData.balance) + amount; toAddressData.balance = uint96(toBalance); t.toEnd = toBalance / _unit(); } uint256 startId; uint256 maxId; unchecked { uint256 preTotalSupply = uint256($.totalSupply); startId = preTotalSupply / _unit() + 1; uint256 totalSupply_ = uint256(preTotalSupply) + amount; $.totalSupply = uint96(totalSupply_); uint256 overflows = _toUint(_totalSupplyOverflows(totalSupply_)); if (overflows | _toUint(totalSupply_ < amount) != 0) revert TotalSupplyOverflow(); maxId = totalSupply_ / _unit(); } unchecked { if (toAddressData.flags & _ADDRESS_DATA_SKIP_NFT_FLAG == 0) { Uint32Map storage toOwned = $.owned[to]; Uint32Map storage oo = $.oo; uint256 toIndex = toAddressData.ownedLength; _DNPackedLogs memory packedLogs = _packedLogsMalloc(_zeroFloorSub(t.toEnd, toIndex)); if (packedLogs.logs.length != 0) { _packedLogsSet(packedLogs, to, 0); $.totalNFTSupply += uint32(packedLogs.logs.length); toAddressData.ownedLength = uint32(t.toEnd); t.toAlias = _registerAndResolveAlias(toAddressData, to); // Mint loop. do { uint256 id = startId; while (_get(oo, _ownershipIndex(id)) != 0) { id = _useExistsLookup() ? _wrapNFTId(_findFirstUnset($.exists, id + 1, maxId + 1), maxId) : _wrapNFTId(id + 1, maxId); } startId = _wrapNFTId(id + 1, maxId); if (_useExistsLookup()) _set($.exists, id, true); _set(toOwned, toIndex, uint32(id)); _setOwnerAliasAndOwnedIndex(oo, id, t.toAlias, uint32(toIndex++)); _packedLogsAppend(packedLogs, id); _afterNFTTransfer(address(0), to, id); } while (toIndex != t.toEnd); _packedLogsSend(packedLogs, $.mirrorERC721); } } } /// @solidity memory-safe-assembly assembly { // Emit the {Transfer} event. mstore(0x00, amount) log3(0x00, 0x20, _TRANSFER_EVENT_SIGNATURE, 0, shr(96, shl(96, to))) } } /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* INTERNAL BURN FUNCTIONS */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Burns `amount` tokens from `from`, reducing the total supply. /// /// Will burn sender NFTs if balance after transfer is less than /// the amount required to support the current NFT balance. /// /// Emits a {Transfer} event. function _burn(address from, uint256 amount) internal virtual { AddressData storage fromAddressData = _addressData(from); DN404Storage storage $ = _getDN404Storage(); if ($.mirrorERC721 == address(0)) revert(); uint256 fromBalance = fromAddressData.balance; if (amount > fromBalance) revert InsufficientBalance(); unchecked { fromAddressData.balance = uint96(fromBalance -= amount); uint256 totalSupply_ = uint256($.totalSupply) - amount; $.totalSupply = uint96(totalSupply_); Uint32Map storage fromOwned = $.owned[from]; uint256 fromIndex = fromAddressData.ownedLength; uint256 numNFTBurns = _zeroFloorSub(fromIndex, fromBalance / _unit()); if (numNFTBurns != 0) { _DNPackedLogs memory packedLogs = _packedLogsMalloc(numNFTBurns); _packedLogsSet(packedLogs, from, 1); bool addToBurnedPool; { uint256 totalNFTSupply = uint256($.totalNFTSupply) - numNFTBurns; $.totalNFTSupply = uint32(totalNFTSupply); addToBurnedPool = _addToBurnedPool(totalNFTSupply, totalSupply_); } Uint32Map storage oo = $.oo; uint256 fromEnd = fromIndex - numNFTBurns; fromAddressData.ownedLength = uint32(fromEnd); uint32 burnedPoolTail = $.burnedPoolTail; // Burn loop. do { uint256 id = _get(fromOwned, --fromIndex); _setOwnerAliasAndOwnedIndex(oo, id, 0, 0); _packedLogsAppend(packedLogs, id); if (_useExistsLookup()) _set($.exists, id, false); if (addToBurnedPool) _set($.burnedPool, burnedPoolTail++, uint32(id)); if (_get($.mayHaveNFTApproval, id)) { _set($.mayHaveNFTApproval, id, false); delete $.nftApprovals[id]; } _afterNFTTransfer(from, address(0), id); } while (fromIndex != fromEnd); if (addToBurnedPool) $.burnedPoolTail = burnedPoolTail; _packedLogsSend(packedLogs, $.mirrorERC721); } } /// @solidity memory-safe-assembly assembly { // Emit the {Transfer} event. mstore(0x00, amount) log3(0x00, 0x20, _TRANSFER_EVENT_SIGNATURE, shr(96, shl(96, from)), 0) } } /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* INTERNAL TRANSFER FUNCTIONS */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Moves `amount` of tokens from `from` to `to`. /// /// Will burn sender NFTs if balance after transfer is less than /// the amount required to support the current NFT balance. /// /// Will mint NFTs to `to` if the recipient's new balance supports /// additional NFTs ***AND*** the `to` address's skipNFT flag is /// set to false. /// /// Emits a {Transfer} event. function _transfer(address from, address to, uint256 amount) internal virtual { if (to == address(0)) revert TransferToZeroAddress(); AddressData storage fromAddressData = _addressData(from); AddressData storage toAddressData = _addressData(to); DN404Storage storage $ = _getDN404Storage(); if ($.mirrorERC721 == address(0)) revert(); _DNTransferTemps memory t; t.fromOwnedLength = fromAddressData.ownedLength; t.toOwnedLength = toAddressData.ownedLength; t.totalSupply = $.totalSupply; if (amount > (t.fromBalance = fromAddressData.balance)) revert InsufficientBalance(); unchecked { fromAddressData.balance = uint96(t.fromBalance -= amount); toAddressData.balance = uint96(t.toBalance = uint256(toAddressData.balance) + amount); t.numNFTBurns = _zeroFloorSub(t.fromOwnedLength, t.fromBalance / _unit()); if (toAddressData.flags & _ADDRESS_DATA_SKIP_NFT_FLAG == 0) { if (from == to) t.toOwnedLength = t.fromOwnedLength - t.numNFTBurns; t.numNFTMints = _zeroFloorSub(t.toBalance / _unit(), t.toOwnedLength); } while (_useDirectTransfersIfPossible()) { uint256 n = _min(t.fromOwnedLength, _min(t.numNFTBurns, t.numNFTMints)); if (n == 0) break; t.numNFTBurns -= n; t.numNFTMints -= n; if (from == to) { t.toOwnedLength += n; break; } _DNDirectLogs memory directLogs = _directLogsMalloc(n, from, to); Uint32Map storage fromOwned = $.owned[from]; Uint32Map storage toOwned = $.owned[to]; t.toAlias = _registerAndResolveAlias(toAddressData, to); uint256 toIndex = t.toOwnedLength; // Direct transfer loop. do { uint256 id = _get(fromOwned, --t.fromOwnedLength); _set(toOwned, toIndex, uint32(id)); _setOwnerAliasAndOwnedIndex($.oo, id, t.toAlias, uint32(toIndex++)); _directLogsAppend(directLogs, id); if (_get($.mayHaveNFTApproval, id)) { _set($.mayHaveNFTApproval, id, false); delete $.nftApprovals[id]; } _afterNFTTransfer(from, to, id); } while (--n != 0); toAddressData.ownedLength = uint32(t.toOwnedLength = toIndex); fromAddressData.ownedLength = uint32(t.fromOwnedLength); _directLogsSend(directLogs, $.mirrorERC721); break; } t.totalNFTSupply = uint256($.totalNFTSupply) + t.numNFTMints - t.numNFTBurns; $.totalNFTSupply = uint32(t.totalNFTSupply); Uint32Map storage oo = $.oo; _DNPackedLogs memory packedLogs = _packedLogsMalloc(t.numNFTBurns + t.numNFTMints); t.burnedPoolTail = $.burnedPoolTail; if (t.numNFTBurns != 0) { _packedLogsSet(packedLogs, from, 1); bool addToBurnedPool = _addToBurnedPool(t.totalNFTSupply, t.totalSupply); Uint32Map storage fromOwned = $.owned[from]; uint256 fromIndex = t.fromOwnedLength; fromAddressData.ownedLength = uint32(t.fromEnd = fromIndex - t.numNFTBurns); uint32 burnedPoolTail = t.burnedPoolTail; // Burn loop. do { uint256 id = _get(fromOwned, --fromIndex); _setOwnerAliasAndOwnedIndex(oo, id, 0, 0); _packedLogsAppend(packedLogs, id); if (_useExistsLookup()) _set($.exists, id, false); if (addToBurnedPool) _set($.burnedPool, burnedPoolTail++, uint32(id)); if (_get($.mayHaveNFTApproval, id)) { _set($.mayHaveNFTApproval, id, false); delete $.nftApprovals[id]; } _afterNFTTransfer(from, address(0), id); } while (fromIndex != t.fromEnd); if (addToBurnedPool) $.burnedPoolTail = (t.burnedPoolTail = burnedPoolTail); } if (t.numNFTMints != 0) { _packedLogsSet(packedLogs, to, 0); Uint32Map storage toOwned = $.owned[to]; t.toAlias = _registerAndResolveAlias(toAddressData, to); uint256 maxId = t.totalSupply / _unit(); t.nextTokenId = _wrapNFTId($.nextTokenId, maxId); uint256 toIndex = t.toOwnedLength; toAddressData.ownedLength = uint32(t.toEnd = toIndex + t.numNFTMints); uint32 burnedPoolHead = $.burnedPoolHead; // Mint loop. do { uint256 id; if (burnedPoolHead != t.burnedPoolTail) { id = _get($.burnedPool, burnedPoolHead++); } else { id = t.nextTokenId; while (_get(oo, _ownershipIndex(id)) != 0) { id = _useExistsLookup() ? _wrapNFTId(_findFirstUnset($.exists, id + 1, maxId + 1), maxId) : _wrapNFTId(id + 1, maxId); } t.nextTokenId = _wrapNFTId(id + 1, maxId); } if (_useExistsLookup()) _set($.exists, id, true); _set(toOwned, toIndex, uint32(id)); _setOwnerAliasAndOwnedIndex(oo, id, t.toAlias, uint32(toIndex++)); _packedLogsAppend(packedLogs, id); _afterNFTTransfer(address(0), to, id); } while (toIndex != t.toEnd); $.burnedPoolHead = burnedPoolHead; $.nextTokenId = uint32(t.nextTokenId); } if (packedLogs.logs.length != 0) _packedLogsSend(packedLogs, $.mirrorERC721); } /// @solidity memory-safe-assembly assembly { // Emit the {Transfer} event. mstore(0x00, amount) // forgefmt: disable-next-item log3(0x00, 0x20, _TRANSFER_EVENT_SIGNATURE, shr(96, shl(96, from)), shr(96, shl(96, to))) } } /// @dev Transfers token `id` from `from` to `to`. /// /// Requirements: /// /// - Call must originate from the mirror contract. /// - Token `id` must exist. /// - `from` must be the owner of the token. /// - `to` cannot be the zero address. /// `msgSender` must be the owner of the token, or be approved to manage the token. /// /// Emits a {Transfer} event. function _transferFromNFT(address from, address to, uint256 id, address msgSender) internal virtual { if (to == address(0)) revert TransferToZeroAddress(); DN404Storage storage $ = _getDN404Storage(); if ($.mirrorERC721 == address(0)) revert(); Uint32Map storage oo = $.oo; if (from != $.aliasToAddress[_get(oo, _ownershipIndex(_restrictNFTId(id)))]) { revert TransferFromIncorrectOwner(); } if (msgSender != from) { if (_ref($.operatorApprovals, from, msgSender).value == 0) { if (msgSender != $.nftApprovals[id]) { revert TransferCallerNotOwnerNorApproved(); } } } AddressData storage fromAddressData = _addressData(from); AddressData storage toAddressData = _addressData(to); uint256 unit = _unit(); mapping(address => Uint32Map) storage owned = $.owned; Uint32Map storage fromOwned = owned[from]; unchecked { uint256 fromBalance = fromAddressData.balance; if (unit > fromBalance) revert InsufficientBalance(); fromAddressData.balance = uint96(fromBalance - unit); toAddressData.balance += uint96(unit); } if (_get($.mayHaveNFTApproval, id)) { _set($.mayHaveNFTApproval, id, false); delete $.nftApprovals[id]; } unchecked { uint32 updatedId = _get(fromOwned, --fromAddressData.ownedLength); uint32 i = _get(oo, _ownedIndex(id)); _set(fromOwned, i, updatedId); _set(oo, _ownedIndex(updatedId), i); } unchecked { uint32 n = toAddressData.ownedLength++; _set(owned[to], n, uint32(id)); _setOwnerAliasAndOwnedIndex(oo, id, _registerAndResolveAlias(toAddressData, to), n); } _afterNFTTransfer(from, to, id); /// @solidity memory-safe-assembly assembly { // Emit the {Transfer} event. mstore(0x00, unit) // forgefmt: disable-next-item log3(0x00, 0x20, _TRANSFER_EVENT_SIGNATURE, shr(96, shl(96, from)), shr(96, shl(96, to))) } } /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* INTERNAL APPROVE FUNCTIONS */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Sets `amount` as the allowance of `spender` over the tokens of `owner`. /// /// Emits a {Approval} event. function _approve(address owner, address spender, uint256 amount) internal virtual { if (_givePermit2DefaultInfiniteAllowance() && spender == _PERMIT2) { _getDN404Storage().addressData[owner].flags |= _ADDRESS_DATA_OVERRIDE_PERMIT2_FLAG; } _ref(_getDN404Storage().allowance, owner, spender).value = amount; /// @solidity memory-safe-assembly assembly { // Emit the {Approval} event. mstore(0x00, amount) // forgefmt: disable-next-item log3(0x00, 0x20, _APPROVAL_EVENT_SIGNATURE, shr(96, shl(96, owner)), shr(96, shl(96, spender))) } } /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* DATA HITCHHIKING FUNCTIONS */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Returns the auxiliary data for `owner`. /// Minting, transferring, burning the tokens of `owner` will not change the auxiliary data. /// Auxiliary data can be set for any address, even if it does not have any tokens. function _getAux(address owner) internal view virtual returns (uint88) { return _getDN404Storage().addressData[owner].aux; } /// @dev Set the auxiliary data for `owner` to `value`. /// Minting, transferring, burning the tokens of `owner` will not change the auxiliary data. /// Auxiliary data can be set for any address, even if it does not have any tokens. function _setAux(address owner, uint88 value) internal virtual { _getDN404Storage().addressData[owner].aux = value; } /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* SKIP NFT FUNCTIONS */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Returns true if minting and transferring ERC20s to `owner` will skip minting NFTs. /// Returns false otherwise. function getSkipNFT(address owner) public view virtual returns (bool) { AddressData storage d = _getDN404Storage().addressData[owner]; if (d.flags & _ADDRESS_DATA_INITIALIZED_FLAG == 0) return _hasCode(owner); return d.flags & _ADDRESS_DATA_SKIP_NFT_FLAG != 0; } /// @dev Sets the caller's skipNFT flag to `skipNFT`. Returns true. /// /// Emits a {SkipNFTSet} event. function setSkipNFT(bool skipNFT) public virtual returns (bool) { _setSkipNFT(msg.sender, skipNFT); return true; } /// @dev Internal function to set account `owner` skipNFT flag to `state` /// /// Initializes account `owner` AddressData if it is not currently initialized. /// /// Emits a {SkipNFTSet} event. function _setSkipNFT(address owner, bool state) internal virtual { AddressData storage d = _addressData(owner); if ((d.flags & _ADDRESS_DATA_SKIP_NFT_FLAG != 0) != state) { d.flags ^= _ADDRESS_DATA_SKIP_NFT_FLAG; } /// @solidity memory-safe-assembly assembly { mstore(0x00, iszero(iszero(state))) log2(0x00, 0x20, _SKIP_NFT_SET_EVENT_SIGNATURE, shr(96, shl(96, owner))) } } /// @dev Returns a storage data pointer for account `owner` AddressData /// /// Initializes account `owner` AddressData if it is not currently initialized. function _addressData(address owner) internal virtual returns (AddressData storage d) { d = _getDN404Storage().addressData[owner]; unchecked { if (d.flags & _ADDRESS_DATA_INITIALIZED_FLAG == 0) { uint256 skipNFT = _toUint(_hasCode(owner)) * _ADDRESS_DATA_SKIP_NFT_FLAG; d.flags = uint8(skipNFT | _ADDRESS_DATA_INITIALIZED_FLAG); } } } /// @dev Returns the `addressAlias` of account `to`. /// /// Assigns and registers the next alias if `to` alias was not previously registered. function _registerAndResolveAlias(AddressData storage toAddressData, address to) internal virtual returns (uint32 addressAlias) { DN404Storage storage $ = _getDN404Storage(); addressAlias = toAddressData.addressAlias; if (addressAlias == 0) { unchecked { addressAlias = ++$.numAliases; } toAddressData.addressAlias = addressAlias; $.aliasToAddress[addressAlias] = to; if (addressAlias == 0) revert(); // Overflow. } } /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* MIRROR OPERATIONS */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Returns the address of the mirror NFT contract. function mirrorERC721() public view virtual returns (address) { return _getDN404Storage().mirrorERC721; } /// @dev Returns the total NFT supply. function _totalNFTSupply() internal view virtual returns (uint256) { return _getDN404Storage().totalNFTSupply; } /// @dev Returns `owner` NFT balance. function _balanceOfNFT(address owner) internal view virtual returns (uint256) { return _getDN404Storage().addressData[owner].ownedLength; } /// @dev Returns the owner of token `id`. /// Returns the zero address instead of reverting if the token does not exist. function _ownerAt(uint256 id) internal view virtual returns (address) { DN404Storage storage $ = _getDN404Storage(); return $.aliasToAddress[_get($.oo, _ownershipIndex(_restrictNFTId(id)))]; } /// @dev Returns the owner of token `id`. /// /// Requirements: /// - Token `id` must exist. function _ownerOf(uint256 id) internal view virtual returns (address) { if (!_exists(id)) revert TokenDoesNotExist(); return _ownerAt(id); } /// @dev Returns if token `id` exists. function _exists(uint256 id) internal view virtual returns (bool) { return _ownerAt(id) != address(0); } /// @dev Returns the account approved to manage token `id`. /// /// Requirements: /// - Token `id` must exist. function _getApproved(uint256 id) internal view virtual returns (address) { if (!_exists(id)) revert TokenDoesNotExist(); return _getDN404Storage().nftApprovals[id]; } /// @dev Sets `spender` as the approved account to manage token `id`, using `msgSender`. /// /// Requirements: /// - `msgSender` must be the owner or an approved operator for the token owner. function _approveNFT(address spender, uint256 id, address msgSender) internal virtual returns (address owner) { DN404Storage storage $ = _getDN404Storage(); owner = $.aliasToAddress[_get($.oo, _ownershipIndex(_restrictNFTId(id)))]; if (msgSender != owner) { if (_ref($.operatorApprovals, owner, msgSender).value == 0) { revert ApprovalCallerNotOwnerNorApproved(); } } $.nftApprovals[id] = spender; _set($.mayHaveNFTApproval, id, spender != address(0)); } /// @dev Approve or remove the `operator` as an operator for `msgSender`, /// without authorization checks. function _setApprovalForAll(address operator, bool approved, address msgSender) internal virtual { _ref(_getDN404Storage().operatorApprovals, msgSender, operator).value = _toUint(approved); } /// @dev Returns the NFT IDs of `owner` in range `[begin, end)`. /// Optimized for smaller bytecode size, as this function is intended for off-chain calling. function _ownedIds(address owner, uint256 begin, uint256 end) internal view virtual returns (uint256[] memory ids) { DN404Storage storage $ = _getDN404Storage(); Uint32Map storage owned = $.owned[owner]; uint256 n = _min($.addressData[owner].ownedLength, end); /// @solidity memory-safe-assembly assembly { ids := mload(0x40) let i := begin for {} lt(i, n) { i := add(i, 1) } { let s := add(shl(96, owned.slot), shr(3, i)) // Storage slot. let id := and(0xffffffff, shr(shl(5, and(i, 7)), sload(s))) mstore(add(add(ids, 0x20), shl(5, sub(i, begin))), id) // Append to. } mstore(ids, sub(i, begin)) // Store the length. mstore(0x40, add(add(ids, 0x20), shl(5, sub(i, begin)))) // Allocate memory. } } /// @dev Fallback modifier to dispatch calls from the mirror NFT contract /// to internal functions in this contract. modifier dn404Fallback() virtual { DN404Storage storage $ = _getDN404Storage(); uint256 fnSelector = _calldataload(0x00) >> 224; address mirror = $.mirrorERC721; // `transferFromNFT(address,address,uint256,address)`. if (fnSelector == 0xe5eb36c8) { if (msg.sender != mirror) revert SenderNotMirror(); _transferFromNFT( address(uint160(_calldataload(0x04))), // `from`. address(uint160(_calldataload(0x24))), // `to`. _calldataload(0x44), // `id`. address(uint160(_calldataload(0x64))) // `msgSender`. ); _return(1); } // `setApprovalForAll(address,bool,address)`. if (fnSelector == 0x813500fc) { if (msg.sender != mirror) revert SenderNotMirror(); _setApprovalForAll( address(uint160(_calldataload(0x04))), // `spender`. _calldataload(0x24) != 0, // `status`. address(uint160(_calldataload(0x44))) // `msgSender`. ); _return(1); } // `isApprovedForAll(address,address)`. if (fnSelector == 0xe985e9c5) { if (msg.sender != mirror) revert SenderNotMirror(); Uint256Ref storage ref = _ref( $.operatorApprovals, address(uint160(_calldataload(0x04))), // `owner`. address(uint160(_calldataload(0x24))) // `operator`. ); _return(ref.value); } // `ownerOf(uint256)`. if (fnSelector == 0x6352211e) { if (msg.sender != mirror) revert SenderNotMirror(); _return(uint160(_ownerOf(_calldataload(0x04)))); } // `ownerAt(uint256)`. if (fnSelector == 0x24359879) { if (msg.sender != mirror) revert SenderNotMirror(); _return(uint160(_ownerAt(_calldataload(0x04)))); } // `approveNFT(address,uint256,address)`. if (fnSelector == 0xd10b6e0c) { if (msg.sender != mirror) revert SenderNotMirror(); address owner = _approveNFT( address(uint160(_calldataload(0x04))), // `spender`. _calldataload(0x24), // `id`. address(uint160(_calldataload(0x44))) // `msgSender`. ); _return(uint160(owner)); } // `getApproved(uint256)`. if (fnSelector == 0x081812fc) { if (msg.sender != mirror) revert SenderNotMirror(); _return(uint160(_getApproved(_calldataload(0x04)))); } // `balanceOfNFT(address)`. if (fnSelector == 0xf5b100ea) { if (msg.sender != mirror) revert SenderNotMirror(); _return(_balanceOfNFT(address(uint160(_calldataload(0x04))))); } // `totalNFTSupply()`. if (fnSelector == 0xe2c79281) { if (msg.sender != mirror) revert SenderNotMirror(); _return(_totalNFTSupply()); } // `implementsDN404()`. if (fnSelector == 0xb7a94eb8) { _return(1); } _; } /// @dev Fallback function for calls from mirror NFT contract. /// Override this if you need to implement your custom /// fallback with utilities like Solady's `LibZip.cdFallback()`. /// And always remember to always wrap the fallback with `dn404Fallback`. fallback() external payable virtual dn404Fallback { revert FnSelectorNotRecognized(); // Not mandatory. Just for quality of life. } /// @dev This is to silence the compiler warning. /// Override and remove the revert if you want your contract to receive ETH via receive. receive() external payable virtual { if (msg.value != 0) revert(); } /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* INTERNAL / PRIVATE HELPERS */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Returns `(i - 1) << 1`. function _ownershipIndex(uint256 i) internal pure returns (uint256) { unchecked { return (i - 1) << 1; // Minus 1 as token IDs start from 1. } } /// @dev Returns `((i - 1) << 1) + 1`. function _ownedIndex(uint256 i) internal pure returns (uint256) { unchecked { return ((i - 1) << 1) + 1; // Minus 1 as token IDs start from 1. } } /// @dev Returns the uint32 value at `index` in `map`. function _get(Uint32Map storage map, uint256 index) internal view returns (uint32 result) { /// @solidity memory-safe-assembly assembly { let s := add(shl(96, map.slot), shr(3, index)) // Storage slot. result := and(0xffffffff, shr(shl(5, and(index, 7)), sload(s))) } } /// @dev Updates the uint32 value at `index` in `map`. function _set(Uint32Map storage map, uint256 index, uint32 value) internal { /// @solidity memory-safe-assembly assembly { let s := add(shl(96, map.slot), shr(3, index)) // Storage slot. let o := shl(5, and(index, 7)) // Storage slot offset (bits). let v := sload(s) // Storage slot value. sstore(s, xor(v, shl(o, and(0xffffffff, xor(value, shr(o, v)))))) } } /// @dev Sets the owner alias and the owned index together. function _setOwnerAliasAndOwnedIndex( Uint32Map storage map, uint256 id, uint32 ownership, uint32 ownedIndex ) internal { /// @solidity memory-safe-assembly assembly { let i := sub(id, 1) // Index of the uint64 combined value. let s := add(shl(96, map.slot), shr(2, i)) // Storage slot. let v := sload(s) // Storage slot value. let o := shl(6, and(i, 3)) // Storage slot offset (bits). let combined := or(shl(32, ownedIndex), and(0xffffffff, ownership)) sstore(s, xor(v, shl(o, and(0xffffffffffffffff, xor(shr(o, v), combined))))) } } /// @dev Returns the boolean value of the bit at `index` in `bitmap`. function _get(Bitmap storage bitmap, uint256 index) internal view returns (bool result) { /// @solidity memory-safe-assembly assembly { let s := add(shl(96, bitmap.slot), shr(8, index)) // Storage slot. result := and(1, shr(and(0xff, index), sload(s))) } } /// @dev Updates the bit at `index` in `bitmap` to `value`. function _set(Bitmap storage bitmap, uint256 index, bool value) internal { /// @solidity memory-safe-assembly assembly { let s := add(shl(96, bitmap.slot), shr(8, index)) // Storage slot. let o := and(0xff, index) // Storage slot offset (bits). sstore(s, or(and(sload(s), not(shl(o, 1))), shl(o, iszero(iszero(value))))) } } /// @dev Returns the index of the least significant unset bit in `[begin, end)`. /// If no unset bit is found, returns `type(uint256).max`. function _findFirstUnset(Bitmap storage bitmap, uint256 begin, uint256 end) internal view returns (uint256 unsetBitIndex) { /// @solidity memory-safe-assembly assembly { unsetBitIndex := not(0) // Initialize to `type(uint256).max`. let s := shl(96, bitmap.slot) // Storage offset of the bitmap. let bucket := add(s, shr(8, begin)) let negBits := shl(and(0xff, begin), shr(and(0xff, begin), not(sload(bucket)))) if iszero(negBits) { let lastBucket := add(s, shr(8, end)) for {} 1 {} { bucket := add(bucket, 1) negBits := not(sload(bucket)) if or(negBits, gt(bucket, lastBucket)) { break } } if gt(bucket, lastBucket) { negBits := shr(and(0xff, not(end)), shl(and(0xff, not(end)), negBits)) } } if negBits { // Find-first-set routine. let b := and(negBits, add(not(negBits), 1)) // Isolate the least significant bit. let r := shl(7, lt(0xffffffffffffffffffffffffffffffff, b)) r := or(r, shl(6, lt(0xffffffffffffffff, shr(r, b)))) r := or(r, shl(5, lt(0xffffffff, shr(r, b)))) // For the remaining 32 bits, use a De Bruijn lookup. // forgefmt: disable-next-item r := or(r, byte(and(div(0xd76453e0, shr(r, b)), 0x1f), 0x001f0d1e100c1d070f090b19131c1706010e11080a1a141802121b1503160405)) r := or(shl(8, sub(bucket, s)), r) unsetBitIndex := or(r, sub(0, or(iszero(lt(r, end)), lt(r, begin)))) } } } /// @dev Returns a storage reference to the value at (`a0`, `a1`) in `map`. function _ref(AddressPairToUint256RefMap storage map, address a0, address a1) internal pure returns (Uint256Ref storage ref) { /// @solidity memory-safe-assembly assembly { mstore(0x28, a1) mstore(0x14, a0) mstore(0x00, map.slot) ref.slot := keccak256(0x00, 0x48) // Clear the part of the free memory pointer that was overwritten. mstore(0x28, 0x00) } } /// @dev Wraps the NFT ID. function _wrapNFTId(uint256 id, uint256 maxId) internal pure returns (uint256 result) { /// @solidity memory-safe-assembly assembly { result := or(mul(iszero(gt(id, maxId)), id), gt(id, maxId)) } } /// @dev Returns `id > type(uint32).max ? 0 : id`. function _restrictNFTId(uint256 id) internal pure returns (uint256 result) { /// @solidity memory-safe-assembly assembly { result := mul(id, lt(id, 0x100000000)) } } /// @dev Returns whether `amount` is a valid `totalSupply`. function _totalSupplyOverflows(uint256 amount) internal view returns (bool result) { uint256 unit = _unit(); /// @solidity memory-safe-assembly assembly { result := iszero(iszero(or(shr(96, amount), lt(0xfffffffe, div(amount, unit))))) } } /// @dev Returns `max(0, x - y)`. function _zeroFloorSub(uint256 x, uint256 y) internal pure returns (uint256 z) { /// @solidity memory-safe-assembly assembly { z := mul(gt(x, y), sub(x, y)) } } /// @dev Returns `x < y ? x : y`. function _min(uint256 x, uint256 y) internal pure returns (uint256 z) { /// @solidity memory-safe-assembly assembly { z := xor(x, mul(xor(x, y), lt(y, x))) } } /// @dev Returns `b ? 1 : 0`. function _toUint(bool b) internal pure returns (uint256 result) { /// @solidity memory-safe-assembly assembly { result := iszero(iszero(b)) } } /// @dev Struct containing direct transfer log data for {Transfer} events to be /// emitted by the mirror NFT contract. struct _DNDirectLogs { uint256 offset; address from; address to; uint256[] logs; } /// @dev Initiates memory allocation for direct logs with `n` log items. function _directLogsMalloc(uint256 n, address from, address to) private pure returns (_DNDirectLogs memory p) { /// @solidity memory-safe-assembly assembly { // Note that `p` implicitly allocates and advances the free memory pointer by // 4 words, which we can safely mutate in `_directLogsSend`. let logs := mload(0x40) mstore(logs, n) // Store the length. let offset := add(0x20, logs) // Skip the word for `p.logs.length`. mstore(0x40, add(offset, shl(5, n))) // Allocate memory. mstore(add(0x60, p), logs) // Set `p.logs`. mstore(add(0x40, p), to) // Set `p.to`. mstore(add(0x20, p), from) // Set `p.from`. mstore(p, offset) // Set `p.offset`. } } /// @dev Adds a direct log item to `p` with token `id`. function _directLogsAppend(_DNDirectLogs memory p, uint256 id) private pure { /// @solidity memory-safe-assembly assembly { let offset := mload(p) mstore(offset, id) mstore(p, add(offset, 0x20)) } } /// @dev Calls the `mirror` NFT contract to emit {Transfer} events for packed logs `p`. function _directLogsSend(_DNDirectLogs memory p, address mirror) private { /// @solidity memory-safe-assembly assembly { let logs := mload(add(p, 0x60)) let n := add(0x84, shl(5, mload(logs))) // Length of calldata to send. let o := sub(logs, 0x80) // Start of calldata to send. mstore(o, 0x144027d3) // `logDirectTransfer(address,address,uint256[])`. let from := mload(add(0x20, p)) let to := mload(add(0x40, p)) mstore(add(o, 0x20), from) mstore(add(o, 0x40), to) mstore(add(o, 0x60), 0x60) // Offset of `logs` in the calldata to send. if iszero(and(eq(mload(o), 1), call(gas(), mirror, 0, add(o, 0x1c), n, o, 0x20))) { revert(o, 0x00) } } } /// @dev Struct containing packed log data for {Transfer} events to be /// emitted by the mirror NFT contract. struct _DNPackedLogs { uint256 offset; uint256 addressAndBit; uint256[] logs; } /// @dev Initiates memory allocation for packed logs with `n` log items. function _packedLogsMalloc(uint256 n) private pure returns (_DNPackedLogs memory p) { /// @solidity memory-safe-assembly assembly { // Note that `p` implicitly allocates and advances the free memory pointer by // 3 words, which we can safely mutate in `_packedLogsSend`. let logs := mload(0x40) mstore(logs, n) // Store the length. let offset := add(0x20, logs) // Skip the word for `p.logs.length`. mstore(0x40, add(offset, shl(5, n))) // Allocate memory. mstore(add(0x40, p), logs) // Set `p.logs`. mstore(p, offset) // Set `p.offset`. } } /// @dev Set the current address and the burn bit. function _packedLogsSet(_DNPackedLogs memory p, address a, uint256 burnBit) private pure { /// @solidity memory-safe-assembly assembly { mstore(add(p, 0x20), or(shl(96, a), burnBit)) // Set `p.addressAndBit`. } } /// @dev Adds a packed log item to `p` with token `id`. function _packedLogsAppend(_DNPackedLogs memory p, uint256 id) private pure { /// @solidity memory-safe-assembly assembly { let offset := mload(p) mstore(offset, or(mload(add(p, 0x20)), shl(8, id))) // `p.addressAndBit | (id << 8)`. mstore(p, add(offset, 0x20)) } } /// @dev Calls the `mirror` NFT contract to emit {Transfer} events for packed logs `p`. function _packedLogsSend(_DNPackedLogs memory p, address mirror) private { /// @solidity memory-safe-assembly assembly { let logs := mload(add(p, 0x40)) let o := sub(logs, 0x40) // Start of calldata to send. mstore(o, 0x263c69d6) // `logTransfer(uint256[])`. mstore(add(o, 0x20), 0x20) // Offset of `logs` in the calldata to send. let n := add(0x44, shl(5, mload(logs))) // Length of calldata to send. if iszero(and(eq(mload(o), 1), call(gas(), mirror, 0, add(o, 0x1c), n, o, 0x20))) { revert(o, 0x00) } } } /// @dev Struct of temporary variables for transfers. struct _DNTransferTemps { uint256 numNFTBurns; uint256 numNFTMints; uint256 fromBalance; uint256 toBalance; uint256 fromOwnedLength; uint256 toOwnedLength; uint256 totalSupply; uint256 totalNFTSupply; uint256 fromEnd; uint256 toEnd; uint32 toAlias; uint256 nextTokenId; uint32 burnedPoolTail; } /// @dev Struct of temporary variables for mints. struct _DNMintTemps { uint256 nextTokenId; uint32 burnedPoolTail; uint256 toEnd; uint32 toAlias; } /// @dev Returns if `a` has bytecode of non-zero length. function _hasCode(address a) private view returns (bool result) { /// @solidity memory-safe-assembly assembly { result := extcodesize(a) // Can handle dirty upper bits. } } /// @dev Returns the calldata value at `offset`. function _calldataload(uint256 offset) private pure returns (uint256 value) { /// @solidity memory-safe-assembly assembly { value := calldataload(offset) } } /// @dev Executes a return opcode to return `x` and end the current call frame. function _return(uint256 x) private pure { /// @solidity memory-safe-assembly assembly { mstore(0x00, x) return(0x00, 0x20) } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; /// @title DN404Mirror /// @notice DN404Mirror provides an interface for interacting with the /// NFT tokens in a DN404 implementation. /// /// @author vectorized.eth (@optimizoor) /// @author Quit (@0xQuit) /// @author Michael Amadi (@AmadiMichaels) /// @author cygaar (@0xCygaar) /// @author Thomas (@0xjustadev) /// @author Harrison (@PopPunkOnChain) /// /// @dev Note: /// - The ERC721 data is stored in the base DN404 contract. contract DN404Mirror { /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* EVENTS */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Emitted when token `id` is transferred from `from` to `to`. event Transfer(address indexed from, address indexed to, uint256 indexed id); /// @dev Emitted when `owner` enables `account` to manage the `id` token. event Approval(address indexed owner, address indexed account, uint256 indexed id); /// @dev Emitted when `owner` enables or disables `operator` to manage all of their tokens. event ApprovalForAll(address indexed owner, address indexed operator, bool isApproved); /// @dev The ownership is transferred from `oldOwner` to `newOwner`. /// This is for marketplace signaling purposes. This contract has a `pullOwner()` /// function that will sync the owner from the base contract. event OwnershipTransferred(address indexed oldOwner, address indexed newOwner); /// @dev `keccak256(bytes("Transfer(address,address,uint256)"))`. uint256 private constant _TRANSFER_EVENT_SIGNATURE = 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef; /// @dev `keccak256(bytes("Approval(address,address,uint256)"))`. uint256 private constant _APPROVAL_EVENT_SIGNATURE = 0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925; /// @dev `keccak256(bytes("ApprovalForAll(address,address,bool)"))`. uint256 private constant _APPROVAL_FOR_ALL_EVENT_SIGNATURE = 0x17307eab39ab6107e8899845ad3d59bd9653f200f220920489ca2b5937696c31; /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* CUSTOM ERRORS */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Thrown when a call for an NFT function did not originate /// from the base DN404 contract. error SenderNotBase(); /// @dev Thrown when a call for an NFT function did not originate from the deployer. error SenderNotDeployer(); /// @dev Thrown when transferring an NFT to a contract address that /// does not implement ERC721Receiver. error TransferToNonERC721ReceiverImplementer(); /// @dev Thrown when linking to the DN404 base contract and the /// DN404 supportsInterface check fails or the call reverts. error CannotLink(); /// @dev Thrown when a linkMirrorContract call is received and the /// NFT mirror contract has already been linked to a DN404 base contract. error AlreadyLinked(); /// @dev Thrown when retrieving the base DN404 address when a link has not /// been established. error NotLinked(); /// @dev The function selector is not recognized. error FnSelectorNotRecognized(); /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* STORAGE */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Struct contain the NFT mirror contract storage. struct DN404NFTStorage { // Address of the ERC20 base contract. address baseERC20; // The deployer, if provided. If non-zero, the initialization of the // ERC20 <-> ERC721 link can only be done be the deployer via the ERC20 base contract. address deployer; // The owner of the ERC20 base contract. For marketplace signaling. address owner; } /// @dev Returns a storage pointer for DN404NFTStorage. function _getDN404NFTStorage() internal pure virtual returns (DN404NFTStorage storage $) { /// @solidity memory-safe-assembly assembly { // `uint72(bytes9(keccak256("DN404_MIRROR_STORAGE")))`. $.slot := 0x3602298b8c10b01230 // Truncate to 9 bytes to reduce bytecode size. } } /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* CONSTRUCTOR */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ constructor(address deployer) { // For non-proxies, we will store the deployer so that only the deployer can // link the base contract. _getDN404NFTStorage().deployer = deployer; } /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* ERC721 OPERATIONS */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Returns the token collection name from the base DN404 contract. function name() public view virtual returns (string memory) { return _readString(0x06fdde03, 0); // `name()`. } /// @dev Returns the token collection symbol from the base DN404 contract. function symbol() public view virtual returns (string memory) { return _readString(0x95d89b41, 0); // `symbol()`. } /// @dev Returns the Uniform Resource Identifier (URI) for token `id` from /// the base DN404 contract. function tokenURI(uint256 id) public view virtual returns (string memory) { return _readString(0xc87b56dd, id); // `tokenURI()`. } /// @dev Returns the total NFT supply from the base DN404 contract. function totalSupply() public view virtual returns (uint256) { return _readWord(0xe2c79281, 0, 0); // `totalNFTSupply()`. } /// @dev Returns the number of NFT tokens owned by `nftOwner` from the base DN404 contract. /// /// Requirements: /// - `nftOwner` must not be the zero address. function balanceOf(address nftOwner) public view virtual returns (uint256) { return _readWord(0xf5b100ea, uint160(nftOwner), 0); // `balanceOfNFT(address)`. } /// @dev Returns the owner of token `id` from the base DN404 contract. /// /// Requirements: /// - Token `id` must exist. function ownerOf(uint256 id) public view virtual returns (address) { return address(uint160(_readWord(0x6352211e, id, 0))); // `ownerOf(uint256)`. } /// @dev Returns the owner of token `id` from the base DN404 contract. /// Returns `address(0)` instead of reverting if the token does not exist. function ownerAt(uint256 id) public view virtual returns (address) { return address(uint160(_readWord(0x24359879, id, 0))); // `ownerAt(uint256)`. } /// @dev Sets `spender` as the approved account to manage token `id` in /// the base DN404 contract. /// /// Requirements: /// - Token `id` must exist. /// - The caller must be the owner of the token, /// or an approved operator for the token owner. /// /// Emits an {Approval} event. function approve(address spender, uint256 id) public payable virtual { address base = baseERC20(); /// @solidity memory-safe-assembly assembly { spender := shr(96, shl(96, spender)) let m := mload(0x40) mstore(0x00, 0xd10b6e0c) // `approveNFT(address,uint256,address)`. mstore(0x20, spender) mstore(0x40, id) mstore(0x60, caller()) if iszero( and( // Arguments of `and` are evaluated last to first. gt(returndatasize(), 0x1f), // The call must return at least 32 bytes. call(gas(), base, callvalue(), 0x1c, 0x64, 0x00, 0x20) ) ) { returndatacopy(m, 0x00, returndatasize()) revert(m, returndatasize()) } mstore(0x40, m) // Restore the free memory pointer. mstore(0x60, 0) // Restore the zero pointer. // Emit the {Approval} event. log4(codesize(), 0x00, _APPROVAL_EVENT_SIGNATURE, shr(96, mload(0x0c)), spender, id) } } /// @dev Returns the account approved to manage token `id` from /// the base DN404 contract. /// /// Requirements: /// - Token `id` must exist. function getApproved(uint256 id) public view virtual returns (address) { return address(uint160(_readWord(0x081812fc, id, 0))); // `getApproved(uint256)`. } /// @dev Sets whether `operator` is approved to manage the tokens of the caller in /// the base DN404 contract. /// /// Emits an {ApprovalForAll} event. function setApprovalForAll(address operator, bool approved) public virtual { address base = baseERC20(); /// @solidity memory-safe-assembly assembly { operator := shr(96, shl(96, operator)) let m := mload(0x40) mstore(0x00, 0x813500fc) // `setApprovalForAll(address,bool,address)`. mstore(0x20, operator) mstore(0x40, iszero(iszero(approved))) mstore(0x60, caller()) if iszero( and( // Arguments of `and` are evaluated last to first. eq(mload(0x00), 1), // The call must return 1. call(gas(), base, callvalue(), 0x1c, 0x64, 0x00, 0x20) ) ) { returndatacopy(m, 0x00, returndatasize()) revert(m, returndatasize()) } // Emit the {ApprovalForAll} event. // The `approved` value is already at 0x40. log3(0x40, 0x20, _APPROVAL_FOR_ALL_EVENT_SIGNATURE, caller(), operator) mstore(0x40, m) // Restore the free memory pointer. mstore(0x60, 0) // Restore the zero pointer. } } /// @dev Returns whether `operator` is approved to manage the tokens of `nftOwner` from /// the base DN404 contract. function isApprovedForAll(address nftOwner, address operator) public view virtual returns (bool) { // `isApprovedForAll(address,address)`. return _readWord(0xe985e9c5, uint160(nftOwner), uint160(operator)) != 0; } /// @dev Transfers token `id` from `from` to `to`. /// /// Requirements: /// /// - Token `id` must exist. /// - `from` must be the owner of the token. /// - `to` cannot be the zero address. /// - The caller must be the owner of the token, or be approved to manage the token. /// /// Emits a {Transfer} event. function transferFrom(address from, address to, uint256 id) public payable virtual { address base = baseERC20(); /// @solidity memory-safe-assembly assembly { from := shr(96, shl(96, from)) to := shr(96, shl(96, to)) let m := mload(0x40) mstore(m, 0xe5eb36c8) // `transferFromNFT(address,address,uint256,address)`. mstore(add(m, 0x20), from) mstore(add(m, 0x40), to) mstore(add(m, 0x60), id) mstore(add(m, 0x80), caller()) if iszero( and( // Arguments of `and` are evaluated last to first. eq(mload(m), 1), // The call must return 1. call(gas(), base, callvalue(), add(m, 0x1c), 0x84, m, 0x20) ) ) { returndatacopy(m, 0x00, returndatasize()) revert(m, returndatasize()) } // Emit the {Transfer} event. log4(codesize(), 0x00, _TRANSFER_EVENT_SIGNATURE, from, to, id) } } /// @dev Equivalent to `safeTransferFrom(from, to, id, "")`. function safeTransferFrom(address from, address to, uint256 id) public payable virtual { transferFrom(from, to, id); if (_hasCode(to)) _checkOnERC721Received(from, to, id, ""); } /// @dev Transfers token `id` from `from` to `to`. /// /// Requirements: /// /// - Token `id` must exist. /// - `from` must be the owner of the token. /// - `to` cannot be the zero address. /// - The caller must be the owner of the token, or be approved to manage the token. /// - If `to` refers to a smart contract, it must implement /// {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. /// /// Emits a {Transfer} event. function safeTransferFrom(address from, address to, uint256 id, bytes calldata data) public payable virtual { transferFrom(from, to, id); if (_hasCode(to)) _checkOnERC721Received(from, to, id, data); } /// @dev Returns true if this contract implements the interface defined by `interfaceId`. /// See: https://eips.ethereum.org/EIPS/eip-165 /// This function call must use less than 30000 gas. function supportsInterface(bytes4 interfaceId) public view virtual returns (bool result) { /// @solidity memory-safe-assembly assembly { let s := shr(224, interfaceId) // ERC165: 0x01ffc9a7, ERC721: 0x80ac58cd, ERC721Metadata: 0x5b5e139f. result := or(or(eq(s, 0x01ffc9a7), eq(s, 0x80ac58cd)), eq(s, 0x5b5e139f)) } } /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* OWNER SYNCING OPERATIONS */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Returns the `owner` of the contract, for marketplace signaling purposes. function owner() public view virtual returns (address) { return _getDN404NFTStorage().owner; } /// @dev Permissionless function to pull the owner from the base DN404 contract /// if it implements ownable, for marketplace signaling purposes. function pullOwner() public virtual returns (bool) { address newOwner; address base = baseERC20(); /// @solidity memory-safe-assembly assembly { mstore(0x00, 0x8da5cb5b) // `owner()`. let success := staticcall(gas(), base, 0x1c, 0x04, 0x00, 0x20) newOwner := mul(shr(96, mload(0x0c)), and(gt(returndatasize(), 0x1f), success)) } DN404NFTStorage storage $ = _getDN404NFTStorage(); address oldOwner = $.owner; if (oldOwner != newOwner) { $.owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } return true; } /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* MIRROR OPERATIONS */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Returns the address of the base DN404 contract. function baseERC20() public view virtual returns (address base) { base = _getDN404NFTStorage().baseERC20; if (base == address(0)) revert NotLinked(); } /// @dev Fallback modifier to execute calls from the base DN404 contract. modifier dn404NFTFallback() virtual { DN404NFTStorage storage $ = _getDN404NFTStorage(); uint256 fnSelector = _calldataload(0x00) >> 224; // `logTransfer(uint256[])`. if (fnSelector == 0x263c69d6) { if (msg.sender != $.baseERC20) revert SenderNotBase(); /// @solidity memory-safe-assembly assembly { let o := add(0x24, calldataload(0x04)) // Packed logs offset. let end := add(o, shl(5, calldataload(sub(o, 0x20)))) for {} iszero(eq(o, end)) { o := add(0x20, o) } { let d := calldataload(o) // Entry in the packed logs. let a := shr(96, d) // The address. let b := and(1, d) // Whether it is a burn. log4( codesize(), 0x00, _TRANSFER_EVENT_SIGNATURE, mul(a, b), // `from`. mul(a, iszero(b)), // `to`. shr(168, shl(160, d)) // `id`. ) } mstore(0x00, 0x01) return(0x00, 0x20) } } // `logDirectTransfer(address,address,uint256[])`. if (fnSelector == 0x144027d3) { if (msg.sender != $.baseERC20) revert SenderNotBase(); /// @solidity memory-safe-assembly assembly { let from := calldataload(0x04) let to := calldataload(0x24) let o := add(0x24, calldataload(0x44)) // Direct logs offset. let end := add(o, shl(5, calldataload(sub(o, 0x20)))) for {} iszero(eq(o, end)) { o := add(0x20, o) } { log4(codesize(), 0x00, _TRANSFER_EVENT_SIGNATURE, from, to, calldataload(o)) } mstore(0x00, 0x01) return(0x00, 0x20) } } // `linkMirrorContract(address)`. if (fnSelector == 0x0f4599e5) { if ($.deployer != address(0)) { if (address(uint160(_calldataload(0x04))) != $.deployer) { revert SenderNotDeployer(); } } if ($.baseERC20 != address(0)) revert AlreadyLinked(); $.baseERC20 = msg.sender; /// @solidity memory-safe-assembly assembly { mstore(0x00, 0x01) return(0x00, 0x20) } } _; } /// @dev Fallback function for calls from base DN404 contract. /// Override this if you need to implement your custom /// fallback with utilities like Solady's `LibZip.cdFallback()`. /// And always remember to always wrap the fallback with `dn404NFTFallback`. fallback() external payable virtual dn404NFTFallback { revert FnSelectorNotRecognized(); // Not mandatory. Just for quality of life. } /// @dev This is to silence the compiler warning. /// Override and remove the revert if you want your contract to receive ETH via receive. receive() external payable virtual { if (msg.value != 0) revert(); } /*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/ /* PRIVATE HELPERS */ /*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/ /// @dev Helper to read a string from the base DN404 contract. function _readString(uint256 fnSelector, uint256 arg0) private view returns (string memory result) { address base = baseERC20(); /// @solidity memory-safe-assembly assembly { result := mload(0x40) mstore(0x00, fnSelector) mstore(0x20, arg0) if iszero(staticcall(gas(), base, 0x1c, 0x24, 0x00, 0x00)) { returndatacopy(result, 0x00, returndatasize()) revert(result, returndatasize()) } returndatacopy(0x00, 0x00, 0x20) // Copy the offset of the string in returndata. returndatacopy(result, mload(0x00), 0x20) // Copy the length of the string. returndatacopy(add(result, 0x20), add(mload(0x00), 0x20), mload(result)) // Copy the string. let end := add(add(result, 0x20), mload(result)) mstore(end, 0) // Zeroize the word after the string. mstore(0x40, add(end, 0x20)) // Allocate memory. } } /// @dev Helper to read a word from the base DN404 contract. function _readWord(uint256 fnSelector, uint256 arg0, uint256 arg1) private view returns (uint256 result) { address base = baseERC20(); /// @solidity memory-safe-assembly assembly { let m := mload(0x40) mstore(0x00, fnSelector) mstore(0x20, arg0) mstore(0x40, arg1) if iszero( and( // Arguments of `and` are evaluated last to first. gt(returndatasize(), 0x1f), // The call must return at least 32 bytes. staticcall(gas(), base, 0x1c, 0x44, 0x00, 0x20) ) ) { returndatacopy(m, 0x00, returndatasize()) revert(m, returndatasize()) } mstore(0x40, m) // Restore the free memory pointer. result := mload(0x00) } } /// @dev Returns the calldata value at `offset`. function _calldataload(uint256 offset) private pure returns (uint256 value) { /// @solidity memory-safe-assembly assembly { value := calldataload(offset) } } /// @dev Returns if `a` has bytecode of non-zero length. function _hasCode(address a) private view returns (bool result) { /// @solidity memory-safe-assembly assembly { result := extcodesize(a) // Can handle dirty upper bits. } } /// @dev Perform a call to invoke {IERC721Receiver-onERC721Received} on `to`. /// Reverts if the target does not support the function correctly. function _checkOnERC721Received(address from, address to, uint256 id, bytes memory data) private { /// @solidity memory-safe-assembly assembly { // Prepare the calldata. let m := mload(0x40) let onERC721ReceivedSelector := 0x150b7a02 mstore(m, onERC721ReceivedSelector) mstore(add(m, 0x20), caller()) // The `operator`, which is always `msg.sender`. mstore(add(m, 0x40), shr(96, shl(96, from))) mstore(add(m, 0x60), id) mstore(add(m, 0x80), 0x80) let n := mload(data) mstore(add(m, 0xa0), n) if n { pop(staticcall(gas(), 4, add(data, 0x20), n, add(m, 0xc0), n)) } // Revert if the call reverts. if iszero(call(gas(), to, 0, add(m, 0x1c), add(n, 0xa4), m, 0x20)) { if returndatasize() { // Bubble up the revert if the call reverts. returndatacopy(m, 0x00, returndatasize()) revert(m, returndatasize()) } } // Load the returndata and compare it. if iszero(eq(mload(m), shl(224, onERC721ReceivedSelector))) { mstore(0x00, 0xd1a57ed6) // `TransferToNonERC721ReceiverImplementer()`. revert(0x1c, 0x04) } } } }
// 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: MIT pragma solidity 0.8.23; import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import {IUniswapV2Router02} from "@uniswap-periphery/interfaces/IUniswapV2Router02.sol"; /// @title BaseToken /// @notice A base contract for all tokens abstract contract BaseToken is ReentrancyGuard { using SafeERC20 for IERC20; address public immutable treasury; IERC20 public immutable wnt; IUniswapV2Router02 public immutable univ2router; uint256 public constant SWAP_TAX = 25; // 0.25% uint256 public constant PRECISION = 10000; // ============================================================================================ // Constructor // ============================================================================================ constructor( IERC20 _wnt, IUniswapV2Router02 _univ2router, address _treasury ) { wnt = _wnt; univ2router = _univ2router; treasury = _treasury; if (block.chainid == 252) { // https://docs.frax.com/fraxtal/fraxtal-incentives/fraxtal-incentives-delegation#setting-delegations-for-smart-contracts address _delegationRegistry = 0x4392dC16867D53DBFE227076606455634d4c2795; _delegationRegistry.call( abi.encodeWithSignature( "setDelegationForSelf(address)", _treasury ) ); _delegationRegistry.call( abi.encodeWithSignature("disableSelfManagingDelegations()") ); } } // ============================================================================================ // External Functions // ============================================================================================ }
// 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); } }
pragma solidity >=0.5.0; interface IUniswapV2Factory { event PairCreated(address indexed token0, address indexed token1, address pair, uint); function feeTo() external view returns (address); function feeToSetter() external view returns (address); function getPair(address tokenA, address tokenB) external view returns (address pair); function allPairs(uint) external view returns (address pair); function allPairsLength() external view returns (uint); function createPair(address tokenA, address tokenB) external returns (address pair); function setFeeTo(address) external; function setFeeToSetter(address) external; }
// 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) (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) (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor() { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { _nonReentrantBefore(); _; _nonReentrantAfter(); } function _nonReentrantBefore() private { // On the first call to nonReentrant, _status will be _NOT_ENTERED require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; } function _nonReentrantAfter() private { // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } /** * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a * `nonReentrant` function in the call stack. */ function _reentrancyGuardEntered() internal view returns (bool) { return _status == _ENTERED; } }
pragma solidity >=0.6.2; import './IUniswapV2Router01.sol'; interface IUniswapV2Router02 is IUniswapV2Router01 { function removeLiquidityETHSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountETH); function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountETH); function swapExactTokensForTokensSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; function swapExactETHForTokensSupportingFeeOnTransferTokens( uint amountOutMin, address[] calldata path, address to, uint deadline ) external payable; function swapExactTokensForETHSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; }
// 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 (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) (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); } } }
pragma solidity >=0.6.2; interface IUniswapV2Router01 { function factory() external pure returns (address); function WETH() external pure 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 addLiquidityETH( address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external payable returns (uint amountToken, uint amountETH, 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 removeLiquidityETH( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountToken, uint amountETH); function removeLiquidityWithPermit( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountA, uint amountB); function removeLiquidityETHWithPermit( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountToken, uint amountETH); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB); function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut); function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn); function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts); }
{ "remappings": [ "forge-std/=lib/forge-std/src/", "@openzeppelin/=lib/openzeppelin-contracts/", "@vectorized/=lib/dn404/src/", "@uniswap-periphery/=lib/v2-periphery/contracts/", "@uniswap-core/=lib/v2-core/contracts/", "dn404/=lib/dn404/", "ds-test/=lib/forge-std/lib/ds-test/src/", "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/", "murky/=lib/dn404/lib/murky/", "openzeppelin-contracts/=lib/openzeppelin-contracts/", "openzeppelin/=lib/openzeppelin-contracts/contracts/", "solady/=lib/dn404/lib/solady/src/", "v2-core/=lib/v2-core/contracts/", "v2-periphery/=lib/v2-periphery/contracts/" ], "optimizer": { "enabled": true, "runs": 200 }, "metadata": { "useLiteralContent": false, "bytecodeHash": "ipfs", "appendCBOR": true }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "evmVersion": "paris", "viaIR": false, "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[{"internalType":"contract IERC20","name":"_wnt","type":"address"},{"internalType":"contract IUniswapV2Router02","name":"_univ2router","type":"address"},{"internalType":"address","name":"_treasury","type":"address"},{"internalType":"string","name":"name_","type":"string"},{"internalType":"string","name":"symbol_","type":"string"},{"internalType":"string","name":"baseURI_","type":"string"},{"internalType":"uint96","name":"_totalSupply","type":"uint96"},{"internalType":"uint256","name":"_tokenLiquidityThreshold","type":"uint256"},{"internalType":"contract IUniswapV2Factory","name":"univ2factory","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"ApprovalCallerNotOwnerNorApproved","type":"error"},{"inputs":[],"name":"DNAlreadyInitialized","type":"error"},{"inputs":[],"name":"FnSelectorNotRecognized","type":"error"},{"inputs":[],"name":"InsufficientAllowance","type":"error"},{"inputs":[],"name":"InsufficientBalance","type":"error"},{"inputs":[],"name":"LinkMirrorContractFailed","type":"error"},{"inputs":[],"name":"MirrorAddressIsZero","type":"error"},{"inputs":[],"name":"SenderNotMirror","type":"error"},{"inputs":[],"name":"TokenDoesNotExist","type":"error"},{"inputs":[],"name":"TotalSupplyOverflow","type":"error"},{"inputs":[],"name":"TransferCallerNotOwnerNorApproved","type":"error"},{"inputs":[],"name":"TransferFromIncorrectOwner","type":"error"},{"inputs":[],"name":"TransferToZeroAddress","type":"error"},{"inputs":[],"name":"UnitIsZero","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"target","type":"address"},{"indexed":false,"internalType":"bool","name":"status","type":"bool"}],"name":"SkipNFTSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Transfer","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"PRECISION","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"SWAP_TAX","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"getSkipNFT","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"mirrorERC721","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pair","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"router","outputs":[{"internalType":"contract IUniswapV2Router02","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bool","name":"skipNFT","type":"bool"}],"name":"setSkipNFT","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"_result","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"},{"inputs":[],"name":"treasury","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"univ2router","outputs":[{"internalType":"contract IUniswapV2Router02","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"wnt","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc20000000000000000000000007a250d5630b4cf539739df2c5dacb4c659f2488d0000000000000000000000008d0847122e1c6909cccfb11e48e811d8608975a90000000000000000000000000000000000000000000000000000000000000120000000000000000000000000000000000000000000000000000000000000016000000000000000000000000000000000000000000000000000000000000001a00000000000000000000000000000000000000000000000056bc75e2d631000000000000000000000000000000000000000000000000000000de0b6b3a76400000000000000000000000000005c69bee701ef814a2b6a3edd4b1652cb9cc5aa6f000000000000000000000000000000000000000000000000000000000000000b4e6f7468696e6743617264000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000b4e6f7468696e67436172640000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000036697066733a2f2f516d4e4e5a4b74346373664778486a4e366638634265524768717a744c375a7a6e6a4a33757375446961354b57662f00000000000000000000
-----Decoded View---------------
Arg [0] : _wnt (address): 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2
Arg [1] : _univ2router (address): 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
Arg [2] : _treasury (address): 0x8d0847122E1c6909cCcfB11e48e811D8608975A9
Arg [3] : name_ (string): NothingCard
Arg [4] : symbol_ (string): NothingCard
Arg [5] : baseURI_ (string): ipfs://QmNNZKt4csfGxHjN6f8cBeRGhqztL7ZznjJ3usuDia5KWf/
Arg [6] : _totalSupply (uint96): 100000000000000000000
Arg [7] : _tokenLiquidityThreshold (uint256): 1000000000000000000
Arg [8] : univ2factory (address): 0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f
-----Encoded View---------------
16 Constructor Arguments found :
Arg [0] : 000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2
Arg [1] : 0000000000000000000000007a250d5630b4cf539739df2c5dacb4c659f2488d
Arg [2] : 0000000000000000000000008d0847122e1c6909cccfb11e48e811d8608975a9
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000120
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000160
Arg [5] : 00000000000000000000000000000000000000000000000000000000000001a0
Arg [6] : 0000000000000000000000000000000000000000000000056bc75e2d63100000
Arg [7] : 0000000000000000000000000000000000000000000000000de0b6b3a7640000
Arg [8] : 0000000000000000000000005c69bee701ef814a2b6a3edd4b1652cb9cc5aa6f
Arg [9] : 000000000000000000000000000000000000000000000000000000000000000b
Arg [10] : 4e6f7468696e6743617264000000000000000000000000000000000000000000
Arg [11] : 000000000000000000000000000000000000000000000000000000000000000b
Arg [12] : 4e6f7468696e6743617264000000000000000000000000000000000000000000
Arg [13] : 0000000000000000000000000000000000000000000000000000000000000036
Arg [14] : 697066733a2f2f516d4e4e5a4b74346373664778486a4e366638634265524768
Arg [15] : 717a744c375a7a6e6a4a33757375446961354b57662f00000000000000000000
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Multichain Portfolio | 27 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.