ERC-20
Overview
Max Total Supply
6,969 PLT
Holders
1,590 ( -0.063%)
Market
Price
$64.08 @ 0.018435 ETH (+7.68%)
Onchain Market Cap
$446,563.95
Circulating Supply Market Cap
$446,563.95
Other Info
Token Contract (WITH 18 Decimals)
Balance
0.005592135504418637 PLTValue
$0.36 ( ~0.000103570683537542 Eth) [0.0001%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Bilaxy | PLT-ETH | $59.14 0.0170021 Eth | $58,611.00 991.007 PLT | 99.5980% |
2 | Uniswap V3 (Ethereum) | 0X553AFE6468949E0685959022217336717DF5FBE8-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $63.07 0.0181489 Eth | $252.26 4.000 0X553AFE6468949E0685959022217336717DF5FBE8 | 0.4020% |
Contract Source Code Verified (Exact Match)
Contract Name:
Palette
Compiler Version
v0.8.23+commit.f704f362
Optimization Enabled:
Yes with 10000 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.8.23; /// @dev Core abstracts of Palette. import {ERC404} from "./404/ERC404.sol"; import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol"; /// @dev Helper libraries to ensure seamless integration. import {LibPalette} from "./libraries/Palette.Lib.sol"; import {MerkleProofLib} from "solady/src/utils/MerkleProofLib.sol"; import {SafeTransferLib} from "solady/src/utils/SafeTransferLib.sol"; import {LibString} from "solady/src/utils/LibString.sol"; /// @dev Reference interfaces for consumption. import {PaletteRenderer} from "./interfaces/PaletteRenderer.sol"; /** * @title Palette: 🟦🟪🟨🟥 * @notice An experimental ERC404 token with phased airdrop claims that combines * the best of ERC20 and ERC721 into a single contract. * @author artist: cfw (@iamcfw) * @author art dev: orbism (@ArtofOrb) * @author contract dev: nftchance (@nftchance | [email protected]) */ contract Palette is ERC404, Ownable { using LibString for uint256; /// @dev The address of the account performing the airdrop. address public minter; /// @dev The URL to the metadata for the tokenURI. string public baseTokenURI; /// @dev State var to effectively revoke access to transfer control. bool public trading; /// @dev State var to effectively revoke access to transfer control. bool public locked; /// @dev Slot for contract render. PaletteRenderer public renderer; /** * @dev Modifier to check if trading is ready. * @param $from The address to transfer from. */ modifier onlyTrading(address $from) { /// @dev Exempt mints as well as transfers from the owner from /// the trading status check. if (trading == false) { if ($from != address(0) && $from != owner()) { revert LibPalette.TokenLoading(); } } _; } /// @dev Initialize Palette. constructor( address $owner, address $minter, string memory $baseTokenURI, string memory $name, string memory $symbol, uint8 $decimals ) ERC404($name, $symbol, $decimals) Ownable($owner) { /// @dev Set the base token URI. baseTokenURI = $baseTokenURI; /// @dev Set the minter for the airdrop. minter = $minter; } /** * @notice Airdrop all of the tokens to the users. * @param $recipients Array of recipients to airdrop to. * @param $amounts Array of amounts to airdrop to each recipient. */ function mint( address[] calldata $recipients, uint256[] calldata $amounts ) public payable { /// @dev Prevent array issues. if ($recipients.length != $amounts.length) { revert LibPalette.MintInvalid(); } /// @dev Ensure that the minter is the one calling this function. if (msg.sender != minter && msg.sender != owner()) { revert LibPalette.MinterInvalid(); } /// @dev Make sure that trading status has not been locked. if(locked == true) revert LibPalette.TradingLocked(); /// @dev Mint the tokens to the recipients. for (uint256 i; i < $recipients.length; i++) { _mintERC20($recipients[i], $amounts[i]); } } /** * @notice Allow the owner to set the ERC721 transfer exempt status. * @dev This function is only available to the owner and enables the ability * to prevent NFT conversion for specific addresses. * @dev This is used for the liquidity pool as well as a few other instances. * @param $account The account to set the ERC721 transfer exempt status of. * @param $value The value to set the ERC721 transfer exempt status to. */ function setERC721TransferExempt( address $account, bool $value ) public onlyOwner { /// @dev Control the fractionalization allowances. _setERC721TransferExempt($account, $value); } /** * @notice Allow the owner to set the base token URI. * @dev This function is only available to the owner and enables the ability * to set the base token URI for the tokenURI. * @param $uri The URI to set as the base token URI. */ function setBaseTokenURI(string memory $uri) public onlyOwner { baseTokenURI = $uri; } /** * @notice Allow the owner to set the renderer for the tokenURI. * @dev This function is only available to the owner and enables the ability * to set the renderer for the tokenURI. * @param $renderer The address of the renderer to set. */ function setRenderer(address $renderer) public onlyOwner { /// @dev Set the renderer for the tokenURI. renderer = PaletteRenderer($renderer); /// @dev Disconnect the Renderer from this contract. if (address(renderer) != address(0)) { renderer.disconnect(); } } /** * @notice Allow the owner to set the minter for the airdrop. * @param $minter The address of the minter to set. */ function setMinter(address $minter) public onlyOwner { /// @dev Make sure that trading status has not been locked. if(locked == true) revert LibPalette.TradingLocked(); /// @dev Update the state of the minter for the airdrop. minter = $minter; } /** * @notice Allow the owner to set the trading status. * @param $trading The status to set the trading status to. */ function setTrading(bool $trading) public onlyOwner { /// @dev Make sure that trading status has not been locked. if(locked == true) revert LibPalette.TradingLocked(); /// @dev Update the state of trading for a specific user. trading = $trading; } /** * @notice Revoke access to the transfer control. * @param $locked The status to set the locked status to. */ function setLocked(bool $locked) public onlyOwner { /// @dev Make sure that trading status has not been locked. if(locked == true) revert LibPalette.TradingLocked(); /// @dev Update the state of trading for a specific user. locked = $locked; } /** * @notice Allow the owner to withdraw the contract balance. */ function withdraw() public onlyOwner { SafeTransferLib.safeTransferETH(owner(), address(this).balance); } /** * @notice ERC721 metadata for tokenURI to return image. * @param $id The id of the token to return the image for. * @return $uri The URI of the token to return the image for. */ function tokenURI( uint256 $id ) public view override returns (string memory) { /// @dev Make sure the token has an owner (ie: it exists). if (_getOwnerOf($id) == address(0)) revert LibPalette.TokenInvalid(); /// @dev The token ID without the encoding shift. uint256 tokenId = $id - (1 << 255); /// @dev If the renderer has been initialized, use the renderer. if (address(renderer) != address(0)) { return renderer.render($id); } /// @dev If the static metadata has not yet been initialized, use the prereveal. bytes memory uriBytes = bytes(baseTokenURI); uint256 length = uriBytes.length; if (length > 0 && uriBytes[length - 1] != 0x2F) { return baseTokenURI; } /// @dev When the renderer has not yet been initialized, use the static. return string.concat(baseTokenURI, tokenId.toString()); } /** * @notice ERC20 trading prevention until the time is ready. * @param $from The address to transfer from. * @param $to The address to transfer to. * @param $value The amount to transfer. */ function _transferERC20( address $from, address $to, uint256 $value ) internal override onlyTrading($from) { super._transferERC20($from, $to, $value); } /** * @notice ERC721 trading prevention until the time is ready. * @dev Realistically this should never be hit, but it is here just * to handle edge-cases where the ERC721 is being transferred * before the ERC20 is ready to be traded. * @param $from The address to transfer from. * @param $to The address to transfer to. * @param $id The id to transfer. */ function _transferERC721( address $from, address $to, uint256 $id ) internal override onlyTrading($from) { super._transferERC721($from, $to, $id); } }
//SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import {IERC721Receiver} from "@openzeppelin/contracts/interfaces/IERC721Receiver.sol"; import {IERC165} from "@openzeppelin/contracts/interfaces/IERC165.sol"; import {IERC404} from "./interfaces/IERC404.sol"; import {DoubleEndedQueue} from "./lib/DoubleEndedQueue.sol"; import {ERC721Events} from "./lib/ERC721Events.sol"; import {ERC20Events} from "./lib/ERC20Events.sol"; abstract contract ERC404 is IERC404 { using DoubleEndedQueue for DoubleEndedQueue.Uint256Deque; /// @dev The queue of ERC-721 tokens stored in the contract. DoubleEndedQueue.Uint256Deque private _storedERC721Ids; /// @dev Token name string public name; /// @dev Token symbol string public symbol; /// @dev Decimals for ERC-20 representation uint8 public immutable decimals; /// @dev Units for ERC-20 representation uint256 public immutable units; /// @dev Total supply in ERC-20 representation uint256 public totalSupply; /// @dev Current mint counter which also represents the highest /// minted id, monotonically increasing to ensure accurate ownership uint256 public minted; /// @dev Initial chain id for EIP-2612 support uint256 internal immutable _INITIAL_CHAIN_ID; /// @dev Initial domain separator for EIP-2612 support bytes32 internal immutable _INITIAL_DOMAIN_SEPARATOR; /// @dev Balance of user in ERC-20 representation mapping(address => uint256) public balanceOf; /// @dev Allowance of user in ERC-20 representation mapping(address => mapping(address => uint256)) public allowance; /// @dev Approval in ERC-721 representaion mapping(uint256 => address) public getApproved; /// @dev Approval for all in ERC-721 representation mapping(address => mapping(address => bool)) public isApprovedForAll; /// @dev Packed representation of ownerOf and owned indices mapping(uint256 => uint256) internal _ownedData; /// @dev Array of owned ids in ERC-721 representation mapping(address => uint256[]) internal _owned; /// @dev Addresses that are exempt from ERC-721 transfer, typically for gas savings (pairs, routers, etc) mapping(address => bool) internal _erc721TransferExempt; /// @dev EIP-2612 nonces mapping(address => uint256) public nonces; /// @dev Address bitmask for packed ownership data uint256 private constant _BITMASK_ADDRESS = (1 << 160) - 1; /// @dev Owned index bitmask for packed ownership data uint256 private constant _BITMASK_OWNED_INDEX = ((1 << 96) - 1) << 160; /// @dev Constant for token id encoding uint256 public constant ID_ENCODING_PREFIX = 1 << 255; constructor(string memory name_, string memory symbol_, uint8 decimals_) { name = name_; symbol = symbol_; if (decimals_ < 18) { revert DecimalsTooLow(); } decimals = decimals_; units = 10 ** decimals; // EIP-2612 initialization _INITIAL_CHAIN_ID = block.chainid; _INITIAL_DOMAIN_SEPARATOR = _computeDomainSeparator(); } /// @notice Function to find owner of a given ERC-721 token function ownerOf( uint256 id_ ) public view virtual returns (address erc721Owner) { erc721Owner = _getOwnerOf(id_); if (!_isValidTokenId(id_)) { revert InvalidTokenId(); } if (erc721Owner == address(0)) { revert NotFound(); } } function owned( address owner_ ) public view virtual returns (uint256[] memory) { return _owned[owner_]; } function erc721BalanceOf( address owner_ ) public view virtual returns (uint256) { return _owned[owner_].length; } function erc20BalanceOf( address owner_ ) public view virtual returns (uint256) { return balanceOf[owner_]; } function erc20TotalSupply() public view virtual returns (uint256) { return totalSupply; } function erc721TotalSupply() public view virtual returns (uint256) { return minted; } function getERC721QueueLength() public view virtual returns (uint256) { return _storedERC721Ids.length(); } function getERC721TokensInQueue( uint256 start_, uint256 count_ ) public view virtual returns (uint256[] memory) { uint256[] memory tokensInQueue = new uint256[](count_); for (uint256 i = start_; i < start_ + count_; ) { tokensInQueue[i - start_] = _storedERC721Ids.at(i); unchecked { ++i; } } return tokensInQueue; } /// @notice tokenURI must be implemented by child contract function tokenURI(uint256 id_) public view virtual returns (string memory); /// @notice Function for token approvals /// @dev This function assumes the operator is attempting to approve /// an ERC-721 if valueOrId_ is a possibly valid ERC-721 token id. /// Unlike setApprovalForAll, spender_ must be allowed to be 0x0 so /// that approval can be revoked. function approve( address spender_, uint256 valueOrId_ ) public virtual returns (bool) { if (_isValidTokenId(valueOrId_)) { erc721Approve(spender_, valueOrId_); } else { return erc20Approve(spender_, valueOrId_); } return true; } function erc721Approve(address spender_, uint256 id_) public virtual { // Intention is to approve as ERC-721 token (id). address erc721Owner = _getOwnerOf(id_); if ( msg.sender != erc721Owner && !isApprovedForAll[erc721Owner][msg.sender] ) { revert Unauthorized(); } getApproved[id_] = spender_; emit ERC721Events.Approval(erc721Owner, spender_, id_); } /// @dev Providing type(uint256).max for approval value results in an /// unlimited approval that is not deducted from on transfers. function erc20Approve( address spender_, uint256 value_ ) public virtual returns (bool) { // Prevent granting 0x0 an ERC-20 allowance. if (spender_ == address(0)) { revert InvalidSpender(); } allowance[msg.sender][spender_] = value_; emit ERC20Events.Approval(msg.sender, spender_, value_); return true; } /// @notice Function for ERC-721 approvals function setApprovalForAll( address operator_, bool approved_ ) public virtual { // Prevent approvals to 0x0. if (operator_ == address(0)) { revert InvalidOperator(); } isApprovedForAll[msg.sender][operator_] = approved_; emit ERC721Events.ApprovalForAll(msg.sender, operator_, approved_); } /// @notice Function for mixed transfers from an operator that may be different than 'from'. /// @dev This function assumes the operator is attempting to transfer an ERC-721 /// if valueOrId is a possible valid token id. function transferFrom( address from_, address to_, uint256 valueOrId_ ) public virtual returns (bool) { if (_isValidTokenId(valueOrId_)) { erc721TransferFrom(from_, to_, valueOrId_); } else { // Intention is to transfer as ERC-20 token (value). return erc20TransferFrom(from_, to_, valueOrId_); } return true; } /// @notice Function for ERC-721 transfers from. /// @dev This function is recommended for ERC721 transfers. function erc721TransferFrom( address from_, address to_, uint256 id_ ) public virtual { // Prevent minting tokens from 0x0. if (from_ == address(0)) { revert InvalidSender(); } // Prevent burning tokens to 0x0. if (to_ == address(0)) { revert InvalidRecipient(); } if (from_ != _getOwnerOf(id_)) { revert Unauthorized(); } // Check that the operator is either the sender or approved for the transfer. if ( msg.sender != from_ && !isApprovedForAll[from_][msg.sender] && msg.sender != getApproved[id_] ) { revert Unauthorized(); } // We only need to check ERC-721 transfer exempt status for the recipient // since the sender being ERC-721 transfer exempt means they have already // had their ERC-721s stripped away during the rebalancing process. if (erc721TransferExempt(to_)) { revert RecipientIsERC721TransferExempt(); } // Transfer 1 * units ERC-20 and 1 ERC-721 token. // ERC-721 transfer exemptions handled above. Can't make it to this point if either is transfer exempt. _transferERC20(from_, to_, units); _transferERC721(from_, to_, id_); } /// @notice Function for ERC-20 transfers from. /// @dev This function is recommended for ERC20 transfers function erc20TransferFrom( address from_, address to_, uint256 value_ ) public virtual returns (bool) { // Prevent minting tokens from 0x0. if (from_ == address(0)) { revert InvalidSender(); } // Prevent burning tokens to 0x0. if (to_ == address(0)) { revert InvalidRecipient(); } uint256 allowed = allowance[from_][msg.sender]; // Check that the operator has sufficient allowance. if (allowed != type(uint256).max) { allowance[from_][msg.sender] = allowed - value_; } // Transferring ERC-20s directly requires the _transferERC20WithERC721 function. // Handles ERC-721 exemptions internally. return _transferERC20WithERC721(from_, to_, value_); } /// @notice Function for ERC-20 transfers. /// @dev This function assumes the operator is attempting to transfer as ERC-20 /// given this function is only supported on the ERC-20 interface. /// Treats even large amounts that are valid ERC-721 ids as ERC-20s. function transfer( address to_, uint256 value_ ) public virtual returns (bool) { // Prevent burning tokens to 0x0. if (to_ == address(0)) { revert InvalidRecipient(); } // Transferring ERC-20s directly requires the _transferERC20WithERC721 function. // Handles ERC-721 exemptions internally. return _transferERC20WithERC721(msg.sender, to_, value_); } /// @notice Function for ERC-721 transfers with contract support. /// This function only supports moving valid ERC-721 ids, as it does not exist on the ERC-20 /// spec and will revert otherwise. function safeTransferFrom( address from_, address to_, uint256 id_ ) public virtual { safeTransferFrom(from_, to_, id_, ""); } /// @notice Function for ERC-721 transfers with contract support and callback data. /// This function only supports moving valid ERC-721 ids, as it does not exist on the /// ERC-20 spec and will revert otherwise. function safeTransferFrom( address from_, address to_, uint256 id_, bytes memory data_ ) public virtual { if (!_isValidTokenId(id_)) { revert InvalidTokenId(); } transferFrom(from_, to_, id_); if ( to_.code.length != 0 && IERC721Receiver(to_).onERC721Received( msg.sender, from_, id_, data_ ) != IERC721Receiver.onERC721Received.selector ) { revert UnsafeRecipient(); } } /// @notice Function for EIP-2612 permits (ERC-20 only). /// @dev Providing type(uint256).max for permit value results in an /// unlimited approval that is not deducted from on transfers. function permit( address owner_, address spender_, uint256 value_, uint256 deadline_, uint8 v_, bytes32 r_, bytes32 s_ ) public virtual { if (deadline_ < block.timestamp) { revert PermitDeadlineExpired(); } // permit cannot be used for ERC-721 token approvals, so ensure // the value does not fall within the valid range of ERC-721 token ids. if (_isValidTokenId(value_)) { revert InvalidApproval(); } if (spender_ == address(0)) { revert InvalidSpender(); } unchecked { address recoveredAddress = ecrecover( keccak256( abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR(), keccak256( abi.encode( keccak256( "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)" ), owner_, spender_, value_, nonces[owner_]++, deadline_ ) ) ) ), v_, r_, s_ ); if (recoveredAddress == address(0) || recoveredAddress != owner_) { revert InvalidSigner(); } allowance[recoveredAddress][spender_] = value_; } emit ERC20Events.Approval(owner_, spender_, value_); } /// @notice Returns domain initial domain separator, or recomputes if chain id is not equal to initial chain id function DOMAIN_SEPARATOR() public view virtual returns (bytes32) { return block.chainid == _INITIAL_CHAIN_ID ? _INITIAL_DOMAIN_SEPARATOR : _computeDomainSeparator(); } function supportsInterface( bytes4 interfaceId ) public view virtual returns (bool) { return interfaceId == type(IERC404).interfaceId || interfaceId == type(IERC165).interfaceId; } /// @notice Function for self-exemption function setSelfERC721TransferExempt(bool state_) public virtual { _setERC721TransferExempt(msg.sender, state_); } /// @notice Function to check if address is transfer exempt function erc721TransferExempt( address target_ ) public view virtual returns (bool) { return target_ == address(0) || _erc721TransferExempt[target_]; } /// @notice For a token token id to be considered valid, it just needs /// to fall within the range of possible token ids, it does not /// necessarily have to be minted yet. function _isValidTokenId(uint256 id_) internal pure returns (bool) { return id_ > ID_ENCODING_PREFIX && id_ != type(uint256).max; } /// @notice Internal function to compute domain separator for EIP-2612 permits function _computeDomainSeparator() internal view virtual returns (bytes32) { return keccak256( abi.encode( keccak256( "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)" ), keccak256(bytes(name)), keccak256("1"), block.chainid, address(this) ) ); } /// @notice This is the lowest level ERC-20 transfer function, which /// should be used for both normal ERC-20 transfers as well as minting. /// Note that this function allows transfers to and from 0x0. function _transferERC20( address from_, address to_, uint256 value_ ) internal virtual { // Minting is a special case for which we should not check the balance of // the sender, and we should increase the total supply. if (from_ == address(0)) { totalSupply += value_; } else { // Deduct value from sender's balance. balanceOf[from_] -= value_; } // Update the recipient's balance. // Can be unchecked because on mint, adding to totalSupply is checked, and on transfer balance deduction is checked. unchecked { balanceOf[to_] += value_; } emit ERC20Events.Transfer(from_, to_, value_); } /// @notice Consolidated record keeping function for transferring ERC-721s. /// @dev Assign the token to the new owner, and remove from the old owner. /// Note that this function allows transfers to and from 0x0. /// Does not handle ERC-721 exemptions. function _transferERC721( address from_, address to_, uint256 id_ ) internal virtual { // If this is not a mint, handle record keeping for transfer from previous owner. if (from_ != address(0)) { // On transfer of an NFT, any previous approval is reset. delete getApproved[id_]; uint256 updatedId = _owned[from_][_owned[from_].length - 1]; if (updatedId != id_) { uint256 updatedIndex = _getOwnedIndex(id_); // update _owned for sender _owned[from_][updatedIndex] = updatedId; // update index for the moved id _setOwnedIndex(updatedId, updatedIndex); } // pop _owned[from_].pop(); } // Check if this is a burn. if (to_ != address(0)) { // If not a burn, update the owner of the token to the new owner. // Update owner of the token to the new owner. _setOwnerOf(id_, to_); // Push token onto the new owner's stack. _owned[to_].push(id_); // Update index for new owner's stack. _setOwnedIndex(id_, _owned[to_].length - 1); } else { // If this is a burn, reset the owner of the token to 0x0 by deleting the token from _ownedData. delete _ownedData[id_]; } emit ERC721Events.Transfer(from_, to_, id_); } /// @notice Internal function for ERC-20 transfers. Also handles any ERC-721 transfers that may be required. // Handles ERC-721 exemptions. function _transferERC20WithERC721( address from_, address to_, uint256 value_ ) internal virtual returns (bool) { uint256 erc20BalanceOfSenderBefore = erc20BalanceOf(from_); uint256 erc20BalanceOfReceiverBefore = erc20BalanceOf(to_); _transferERC20(from_, to_, value_); // Preload for gas savings on branches bool isFromERC721TransferExempt = erc721TransferExempt(from_); bool isToERC721TransferExempt = erc721TransferExempt(to_); // Skip _withdrawAndStoreERC721 and/or _retrieveOrMintERC721 for ERC-721 transfer exempt addresses // 1) to save gas // 2) because ERC-721 transfer exempt addresses won't always have/need ERC-721s corresponding to their ERC20s. if (isFromERC721TransferExempt && isToERC721TransferExempt) { // Case 1) Both sender and recipient are ERC-721 transfer exempt. No ERC-721s need to be transferred. // NOOP. } else if (isFromERC721TransferExempt) { // Case 2) The sender is ERC-721 transfer exempt, but the recipient is not. Contract should not attempt // to transfer ERC-721s from the sender, but the recipient should receive ERC-721s // from the bank/minted for any whole number increase in their balance. // Only cares about whole number increments. uint256 tokensToRetrieveOrMint = (balanceOf[to_] / units) - (erc20BalanceOfReceiverBefore / units); for (uint256 i = 0; i < tokensToRetrieveOrMint; ) { _retrieveOrMintERC721(to_); unchecked { ++i; } } } else if (isToERC721TransferExempt) { // Case 3) The sender is not ERC-721 transfer exempt, but the recipient is. Contract should attempt // to withdraw and store ERC-721s from the sender, but the recipient should not // receive ERC-721s from the bank/minted. // Only cares about whole number increments. uint256 tokensToWithdrawAndStore = (erc20BalanceOfSenderBefore / units) - (balanceOf[from_] / units); for (uint256 i = 0; i < tokensToWithdrawAndStore; ) { _withdrawAndStoreERC721(from_); unchecked { ++i; } } } else { // Case 4) Neither the sender nor the recipient are ERC-721 transfer exempt. // Strategy: // 1. First deal with the whole tokens. These are easy and will just be transferred. // 2. Look at the fractional part of the value: // a) If it causes the sender to lose a whole token that was represented by an NFT due to a // fractional part being transferred, withdraw and store an additional NFT from the sender. // b) If it causes the receiver to gain a whole new token that should be represented by an NFT // due to receiving a fractional part that completes a whole token, retrieve or mint an NFT to the recevier. // Whole tokens worth of ERC-20s get transferred as ERC-721s without any burning/minting. uint256 nftsToTransfer = value_ / units; for (uint256 i = 0; i < nftsToTransfer; ) { // Pop from sender's ERC-721 stack and transfer them (LIFO) uint256 indexOfLastToken = _owned[from_].length - 1; uint256 tokenId = _owned[from_][indexOfLastToken]; _transferERC721(from_, to_, tokenId); unchecked { ++i; } } // If the transfer changes either the sender or the recipient's holdings from a fractional to a non-fractional // amount (or vice versa), adjust ERC-721s. // First check if the send causes the sender to lose a whole token that was represented by an ERC-721 // due to a fractional part being transferred. // // Process: // Take the difference between the whole number of tokens before and after the transfer for the sender. // If that difference is greater than the number of ERC-721s transferred (whole units), then there was // an additional ERC-721 lost due to the fractional portion of the transfer. // If this is a self-send and the before and after balances are equal (not always the case but often), // then no ERC-721s will be lost here. if ( erc20BalanceOfSenderBefore / units - erc20BalanceOf(from_) / units > nftsToTransfer ) { _withdrawAndStoreERC721(from_); } // Then, check if the transfer causes the receiver to gain a whole new token which requires gaining // an additional ERC-721. // // Process: // Take the difference between the whole number of tokens before and after the transfer for the recipient. // If that difference is greater than the number of ERC-721s transferred (whole units), then there was // an additional ERC-721 gained due to the fractional portion of the transfer. // Again, for self-sends where the before and after balances are equal, no ERC-721s will be gained here. if ( erc20BalanceOf(to_) / units - erc20BalanceOfReceiverBefore / units > nftsToTransfer ) { _retrieveOrMintERC721(to_); } } return true; } /// @notice Internal function for ERC20 minting /// @dev This function will allow minting of new ERC20s. /// If mintCorrespondingERC721s_ is true, and the recipient is not ERC-721 exempt, it will /// also mint the corresponding ERC721s. /// Handles ERC-721 exemptions. function _mintERC20(address to_, uint256 value_) internal virtual { /// You cannot mint to the zero address (you can't mint and immediately burn in the same transfer). if (to_ == address(0)) { revert InvalidRecipient(); } if (totalSupply + value_ > ID_ENCODING_PREFIX) { revert MintLimitReached(); } _transferERC20WithERC721(address(0), to_, value_); } /// @notice Internal function for ERC-721 minting and retrieval from the bank. /// @dev This function will allow minting of new ERC-721s up to the total fractional supply. It will /// first try to pull from the bank, and if the bank is empty, it will mint a new token. /// Does not handle ERC-721 exemptions. function _retrieveOrMintERC721(address to_) internal virtual { if (to_ == address(0)) { revert InvalidRecipient(); } uint256 id; if (!_storedERC721Ids.empty()) { // If there are any tokens in the bank, use those first. // Pop off the end of the queue (FIFO). id = _storedERC721Ids.popBack(); } else { // Otherwise, mint a new token, should not be able to go over the total fractional supply. ++minted; // Reserve max uint256 for approvals if (minted == type(uint256).max) { revert MintLimitReached(); } id = ID_ENCODING_PREFIX + minted; } address erc721Owner = _getOwnerOf(id); // The token should not already belong to anyone besides 0x0 or this contract. // If it does, something is wrong, as this should never happen. if (erc721Owner != address(0)) { revert AlreadyExists(); } // Transfer the token to the recipient, either transferring from the contract's bank or minting. // Does not handle ERC-721 exemptions. _transferERC721(erc721Owner, to_, id); } /// @notice Internal function for ERC-721 deposits to bank (this contract). /// @dev This function will allow depositing of ERC-721s to the bank, which can be retrieved by future minters. // Does not handle ERC-721 exemptions. function _withdrawAndStoreERC721(address from_) internal virtual { if (from_ == address(0)) { revert InvalidSender(); } // Retrieve the latest token added to the owner's stack (LIFO). uint256 id = _owned[from_][_owned[from_].length - 1]; // Transfer to 0x0. // Does not handle ERC-721 exemptions. _transferERC721(from_, address(0), id); // Record the token in the contract's bank queue. _storedERC721Ids.pushFront(id); } /// @notice Initialization function to set pairs / etc, saving gas by avoiding mint / burn on unnecessary targets function _setERC721TransferExempt( address target_, bool state_ ) internal virtual { if (target_ == address(0)) { revert InvalidExemption(); } // Adjust the ERC721 balances of the target to respect exemption rules. // Despite this logic, it is still recommended practice to exempt prior to the target // having an active balance. if (state_) { _clearERC721Balance(target_); } else { _reinstateERC721Balance(target_); } _erc721TransferExempt[target_] = state_; } /// @notice Function to reinstate balance on exemption removal function _reinstateERC721Balance(address target_) private { uint256 expectedERC721Balance = erc20BalanceOf(target_) / units; uint256 actualERC721Balance = erc721BalanceOf(target_); for (uint256 i = 0; i < expectedERC721Balance - actualERC721Balance; ) { // Transfer ERC721 balance in from pool _retrieveOrMintERC721(target_); unchecked { ++i; } } } /// @notice Function to clear balance on exemption inclusion function _clearERC721Balance(address target_) private { uint256 erc721Balance = erc721BalanceOf(target_); for (uint256 i = 0; i < erc721Balance; ) { // Transfer out ERC721 balance _withdrawAndStoreERC721(target_); unchecked { ++i; } } } function _getOwnerOf( uint256 id_ ) internal view virtual returns (address ownerOf_) { uint256 data = _ownedData[id_]; assembly { ownerOf_ := and(data, _BITMASK_ADDRESS) } } function _setOwnerOf(uint256 id_, address owner_) internal virtual { uint256 data = _ownedData[id_]; assembly { data := add( and(data, _BITMASK_OWNED_INDEX), and(owner_, _BITMASK_ADDRESS) ) } _ownedData[id_] = data; } function _getOwnedIndex( uint256 id_ ) internal view virtual returns (uint256 ownedIndex_) { uint256 data = _ownedData[id_]; assembly { ownedIndex_ := shr(160, data) } } function _setOwnedIndex(uint256 id_, uint256 index_) internal virtual { uint256 data = _ownedData[id_]; if (index_ > _BITMASK_OWNED_INDEX >> 160) { revert OwnedIndexOverflow(); } assembly { data := add( and(data, _BITMASK_ADDRESS), and(shl(160, index_), _BITMASK_OWNED_INDEX) ) } _ownedData[id_] = data; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol) pragma solidity ^0.8.20; import {Context} from "../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. * * The initial owner is set to the address provided by the deployer. 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; /** * @dev The caller account is not authorized to perform an operation. */ error OwnableUnauthorizedAccount(address account); /** * @dev The owner is not a valid owner account. (eg. `address(0)`) */ error OwnableInvalidOwner(address owner); event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the address provided by the deployer as the initial owner. */ constructor(address initialOwner) { if (initialOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _transferOwnership(initialOwner); } /** * @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 { if (owner() != _msgSender()) { revert OwnableUnauthorizedAccount(_msgSender()); } } /** * @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 { if (newOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.23; library LibPalette { /// @dev Object defintion of a airdrop phase. struct Phase { bytes32 merkleRoot; uint32 startTime; uint32 endTime; } /// @dev The token does not exist. error TokenInvalid(); /// @dev The token is not ready to be traded. error TokenLoading(); /// @dev An invalid minter is attempting to mint. error MintInvalid(); /// @dev An invalid minter is attempting to mint. error MinterInvalid(); /// @dev Transfer state has been locked already. error TradingLocked(); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; /// @notice Gas optimized verification of proof of inclusion for a leaf in a Merkle tree. /// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/MerkleProofLib.sol) /// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/MerkleProofLib.sol) /// @author Modified from OpenZeppelin (https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/cryptography/MerkleProof.sol) library MerkleProofLib { /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* MERKLE PROOF VERIFICATION OPERATIONS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Returns whether `leaf` exists in the Merkle tree with `root`, given `proof`. function verify(bytes32[] memory proof, bytes32 root, bytes32 leaf) internal pure returns (bool isValid) { /// @solidity memory-safe-assembly assembly { if mload(proof) { // Initialize `offset` to the offset of `proof` elements in memory. let offset := add(proof, 0x20) // Left shift by 5 is equivalent to multiplying by 0x20. let end := add(offset, shl(5, mload(proof))) // Iterate over proof elements to compute root hash. for {} 1 {} { // Slot of `leaf` in scratch space. // If the condition is true: 0x20, otherwise: 0x00. let scratch := shl(5, gt(leaf, mload(offset))) // Store elements to hash contiguously in scratch space. // Scratch space is 64 bytes (0x00 - 0x3f) and both elements are 32 bytes. mstore(scratch, leaf) mstore(xor(scratch, 0x20), mload(offset)) // Reuse `leaf` to store the hash to reduce stack operations. leaf := keccak256(0x00, 0x40) offset := add(offset, 0x20) if iszero(lt(offset, end)) { break } } } isValid := eq(leaf, root) } } /// @dev Returns whether `leaf` exists in the Merkle tree with `root`, given `proof`. function verifyCalldata(bytes32[] calldata proof, bytes32 root, bytes32 leaf) internal pure returns (bool isValid) { /// @solidity memory-safe-assembly assembly { if proof.length { // Left shift by 5 is equivalent to multiplying by 0x20. let end := add(proof.offset, shl(5, proof.length)) // Initialize `offset` to the offset of `proof` in the calldata. let offset := proof.offset // Iterate over proof elements to compute root hash. for {} 1 {} { // Slot of `leaf` in scratch space. // If the condition is true: 0x20, otherwise: 0x00. let scratch := shl(5, gt(leaf, calldataload(offset))) // Store elements to hash contiguously in scratch space. // Scratch space is 64 bytes (0x00 - 0x3f) and both elements are 32 bytes. mstore(scratch, leaf) mstore(xor(scratch, 0x20), calldataload(offset)) // Reuse `leaf` to store the hash to reduce stack operations. leaf := keccak256(0x00, 0x40) offset := add(offset, 0x20) if iszero(lt(offset, end)) { break } } } isValid := eq(leaf, root) } } /// @dev Returns whether all `leaves` exist in the Merkle tree with `root`, /// given `proof` and `flags`. /// /// Note: /// - Breaking the invariant `flags.length == (leaves.length - 1) + proof.length` /// will always return false. /// - The sum of the lengths of `proof` and `leaves` must never overflow. /// - Any non-zero word in the `flags` array is treated as true. /// - The memory offset of `proof` must be non-zero /// (i.e. `proof` is not pointing to the scratch space). function verifyMultiProof( bytes32[] memory proof, bytes32 root, bytes32[] memory leaves, bool[] memory flags ) internal pure returns (bool isValid) { // Rebuilds the root by consuming and producing values on a queue. // The queue starts with the `leaves` array, and goes into a `hashes` array. // After the process, the last element on the queue is verified // to be equal to the `root`. // // The `flags` array denotes whether the sibling // should be popped from the queue (`flag == true`), or // should be popped from the `proof` (`flag == false`). /// @solidity memory-safe-assembly assembly { // Cache the lengths of the arrays. let leavesLength := mload(leaves) let proofLength := mload(proof) let flagsLength := mload(flags) // Advance the pointers of the arrays to point to the data. leaves := add(0x20, leaves) proof := add(0x20, proof) flags := add(0x20, flags) // If the number of flags is correct. for {} eq(add(leavesLength, proofLength), add(flagsLength, 1)) {} { // For the case where `proof.length + leaves.length == 1`. if iszero(flagsLength) { // `isValid = (proof.length == 1 ? proof[0] : leaves[0]) == root`. isValid := eq(mload(xor(leaves, mul(xor(proof, leaves), proofLength))), root) break } // The required final proof offset if `flagsLength` is not zero, otherwise zero. let proofEnd := add(proof, shl(5, proofLength)) // We can use the free memory space for the queue. // We don't need to allocate, since the queue is temporary. let hashesFront := mload(0x40) // Copy the leaves into the hashes. // Sometimes, a little memory expansion costs less than branching. // Should cost less, even with a high free memory offset of 0x7d00. leavesLength := shl(5, leavesLength) for { let i := 0 } iszero(eq(i, leavesLength)) { i := add(i, 0x20) } { mstore(add(hashesFront, i), mload(add(leaves, i))) } // Compute the back of the hashes. let hashesBack := add(hashesFront, leavesLength) // This is the end of the memory for the queue. // We recycle `flagsLength` to save on stack variables (sometimes save gas). flagsLength := add(hashesBack, shl(5, flagsLength)) for {} 1 {} { // Pop from `hashes`. let a := mload(hashesFront) // Pop from `hashes`. let b := mload(add(hashesFront, 0x20)) hashesFront := add(hashesFront, 0x40) // If the flag is false, load the next proof, // else, pops from the queue. if iszero(mload(flags)) { // Loads the next proof. b := mload(proof) proof := add(proof, 0x20) // Unpop from `hashes`. hashesFront := sub(hashesFront, 0x20) } // Advance to the next flag. flags := add(flags, 0x20) // Slot of `a` in scratch space. // If the condition is true: 0x20, otherwise: 0x00. let scratch := shl(5, gt(a, b)) // Hash the scratch space and push the result onto the queue. mstore(scratch, a) mstore(xor(scratch, 0x20), b) mstore(hashesBack, keccak256(0x00, 0x40)) hashesBack := add(hashesBack, 0x20) if iszero(lt(hashesBack, flagsLength)) { break } } isValid := and( // Checks if the last value in the queue is same as the root. eq(mload(sub(hashesBack, 0x20)), root), // And whether all the proofs are used, if required. eq(proofEnd, proof) ) break } } } /// @dev Returns whether all `leaves` exist in the Merkle tree with `root`, /// given `proof` and `flags`. /// /// Note: /// - Breaking the invariant `flags.length == (leaves.length - 1) + proof.length` /// will always return false. /// - Any non-zero word in the `flags` array is treated as true. /// - The calldata offset of `proof` must be non-zero /// (i.e. `proof` is from a regular Solidity function with a 4-byte selector). function verifyMultiProofCalldata( bytes32[] calldata proof, bytes32 root, bytes32[] calldata leaves, bool[] calldata flags ) internal pure returns (bool isValid) { // Rebuilds the root by consuming and producing values on a queue. // The queue starts with the `leaves` array, and goes into a `hashes` array. // After the process, the last element on the queue is verified // to be equal to the `root`. // // The `flags` array denotes whether the sibling // should be popped from the queue (`flag == true`), or // should be popped from the `proof` (`flag == false`). /// @solidity memory-safe-assembly assembly { // If the number of flags is correct. for {} eq(add(leaves.length, proof.length), add(flags.length, 1)) {} { // For the case where `proof.length + leaves.length == 1`. if iszero(flags.length) { // `isValid = (proof.length == 1 ? proof[0] : leaves[0]) == root`. // forgefmt: disable-next-item isValid := eq( calldataload( xor(leaves.offset, mul(xor(proof.offset, leaves.offset), proof.length)) ), root ) break } // The required final proof offset if `flagsLength` is not zero, otherwise zero. let proofEnd := add(proof.offset, shl(5, proof.length)) // We can use the free memory space for the queue. // We don't need to allocate, since the queue is temporary. let hashesFront := mload(0x40) // Copy the leaves into the hashes. // Sometimes, a little memory expansion costs less than branching. // Should cost less, even with a high free memory offset of 0x7d00. calldatacopy(hashesFront, leaves.offset, shl(5, leaves.length)) // Compute the back of the hashes. let hashesBack := add(hashesFront, shl(5, leaves.length)) // This is the end of the memory for the queue. // We recycle `flagsLength` to save on stack variables (sometimes save gas). flags.length := add(hashesBack, shl(5, flags.length)) // We don't need to make a copy of `proof.offset` or `flags.offset`, // as they are pass-by-value (this trick may not always save gas). for {} 1 {} { // Pop from `hashes`. let a := mload(hashesFront) // Pop from `hashes`. let b := mload(add(hashesFront, 0x20)) hashesFront := add(hashesFront, 0x40) // If the flag is false, load the next proof, // else, pops from the queue. if iszero(calldataload(flags.offset)) { // Loads the next proof. b := calldataload(proof.offset) proof.offset := add(proof.offset, 0x20) // Unpop from `hashes`. hashesFront := sub(hashesFront, 0x20) } // Advance to the next flag offset. flags.offset := add(flags.offset, 0x20) // Slot of `a` in scratch space. // If the condition is true: 0x20, otherwise: 0x00. let scratch := shl(5, gt(a, b)) // Hash the scratch space and push the result onto the queue. mstore(scratch, a) mstore(xor(scratch, 0x20), b) mstore(hashesBack, keccak256(0x00, 0x40)) hashesBack := add(hashesBack, 0x20) if iszero(lt(hashesBack, flags.length)) { break } } isValid := and( // Checks if the last value in the queue is same as the root. eq(mload(sub(hashesBack, 0x20)), root), // And whether all the proofs are used, if required. eq(proofEnd, proof.offset) ) break } } } /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* EMPTY CALLDATA HELPERS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Returns an empty calldata bytes32 array. function emptyProof() internal pure returns (bytes32[] calldata proof) { /// @solidity memory-safe-assembly assembly { proof.length := 0 } } /// @dev Returns an empty calldata bytes32 array. function emptyLeaves() internal pure returns (bytes32[] calldata leaves) { /// @solidity memory-safe-assembly assembly { leaves.length := 0 } } /// @dev Returns an empty calldata bool array. function emptyFlags() internal pure returns (bool[] calldata flags) { /// @solidity memory-safe-assembly assembly { flags.length := 0 } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; /// @notice Safe ETH and ERC20 transfer library that gracefully handles missing return values. /// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/SafeTransferLib.sol) /// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/SafeTransferLib.sol) /// /// @dev Note: /// - For ETH transfers, please use `forceSafeTransferETH` for DoS protection. /// - For ERC20s, this implementation won't check that a token has code, /// responsibility is delegated to the caller. library SafeTransferLib { /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* CUSTOM ERRORS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev The ETH transfer has failed. error ETHTransferFailed(); /// @dev The ERC20 `transferFrom` has failed. error TransferFromFailed(); /// @dev The ERC20 `transfer` has failed. error TransferFailed(); /// @dev The ERC20 `approve` has failed. error ApproveFailed(); /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* CONSTANTS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Suggested gas stipend for contract receiving ETH that disallows any storage writes. uint256 internal constant GAS_STIPEND_NO_STORAGE_WRITES = 2300; /// @dev Suggested gas stipend for contract receiving ETH to perform a few /// storage reads and writes, but low enough to prevent griefing. uint256 internal constant GAS_STIPEND_NO_GRIEF = 100000; /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* ETH OPERATIONS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ // If the ETH transfer MUST succeed with a reasonable gas budget, use the force variants. // // The regular variants: // - Forwards all remaining gas to the target. // - Reverts if the target reverts. // - Reverts if the current contract has insufficient balance. // // The force variants: // - Forwards with an optional gas stipend // (defaults to `GAS_STIPEND_NO_GRIEF`, which is sufficient for most cases). // - If the target reverts, or if the gas stipend is exhausted, // creates a temporary contract to force send the ETH via `SELFDESTRUCT`. // Future compatible with `SENDALL`: https://eips.ethereum.org/EIPS/eip-4758. // - Reverts if the current contract has insufficient balance. // // The try variants: // - Forwards with a mandatory gas stipend. // - Instead of reverting, returns whether the transfer succeeded. /// @dev Sends `amount` (in wei) ETH to `to`. function safeTransferETH(address to, uint256 amount) internal { /// @solidity memory-safe-assembly assembly { if iszero(call(gas(), to, amount, codesize(), 0x00, codesize(), 0x00)) { mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`. revert(0x1c, 0x04) } } } /// @dev Sends all the ETH in the current contract to `to`. function safeTransferAllETH(address to) internal { /// @solidity memory-safe-assembly assembly { // Transfer all the ETH and check if it succeeded or not. if iszero(call(gas(), to, selfbalance(), codesize(), 0x00, codesize(), 0x00)) { mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`. revert(0x1c, 0x04) } } } /// @dev Force sends `amount` (in wei) ETH to `to`, with a `gasStipend`. function forceSafeTransferETH(address to, uint256 amount, uint256 gasStipend) internal { /// @solidity memory-safe-assembly assembly { if lt(selfbalance(), amount) { mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`. revert(0x1c, 0x04) } if iszero(call(gasStipend, to, amount, codesize(), 0x00, codesize(), 0x00)) { mstore(0x00, to) // Store the address in scratch space. mstore8(0x0b, 0x73) // Opcode `PUSH20`. mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`. if iszero(create(amount, 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation. } } } /// @dev Force sends all the ETH in the current contract to `to`, with a `gasStipend`. function forceSafeTransferAllETH(address to, uint256 gasStipend) internal { /// @solidity memory-safe-assembly assembly { if iszero(call(gasStipend, to, selfbalance(), codesize(), 0x00, codesize(), 0x00)) { mstore(0x00, to) // Store the address in scratch space. mstore8(0x0b, 0x73) // Opcode `PUSH20`. mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`. if iszero(create(selfbalance(), 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation. } } } /// @dev Force sends `amount` (in wei) ETH to `to`, with `GAS_STIPEND_NO_GRIEF`. function forceSafeTransferETH(address to, uint256 amount) internal { /// @solidity memory-safe-assembly assembly { if lt(selfbalance(), amount) { mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`. revert(0x1c, 0x04) } if iszero(call(GAS_STIPEND_NO_GRIEF, to, amount, codesize(), 0x00, codesize(), 0x00)) { mstore(0x00, to) // Store the address in scratch space. mstore8(0x0b, 0x73) // Opcode `PUSH20`. mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`. if iszero(create(amount, 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation. } } } /// @dev Force sends all the ETH in the current contract to `to`, with `GAS_STIPEND_NO_GRIEF`. function forceSafeTransferAllETH(address to) internal { /// @solidity memory-safe-assembly assembly { // forgefmt: disable-next-item if iszero(call(GAS_STIPEND_NO_GRIEF, to, selfbalance(), codesize(), 0x00, codesize(), 0x00)) { mstore(0x00, to) // Store the address in scratch space. mstore8(0x0b, 0x73) // Opcode `PUSH20`. mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`. if iszero(create(selfbalance(), 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation. } } } /// @dev Sends `amount` (in wei) ETH to `to`, with a `gasStipend`. function trySafeTransferETH(address to, uint256 amount, uint256 gasStipend) internal returns (bool success) { /// @solidity memory-safe-assembly assembly { success := call(gasStipend, to, amount, codesize(), 0x00, codesize(), 0x00) } } /// @dev Sends all the ETH in the current contract to `to`, with a `gasStipend`. function trySafeTransferAllETH(address to, uint256 gasStipend) internal returns (bool success) { /// @solidity memory-safe-assembly assembly { success := call(gasStipend, to, selfbalance(), codesize(), 0x00, codesize(), 0x00) } } /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* ERC20 OPERATIONS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Sends `amount` of ERC20 `token` from `from` to `to`. /// Reverts upon failure. /// /// The `from` account must have at least `amount` approved for /// the current contract to manage. function safeTransferFrom(address token, address from, address to, uint256 amount) internal { /// @solidity memory-safe-assembly assembly { let m := mload(0x40) // Cache the free memory pointer. mstore(0x60, amount) // Store the `amount` argument. mstore(0x40, to) // Store the `to` argument. mstore(0x2c, shl(96, from)) // Store the `from` argument. mstore(0x0c, 0x23b872dd000000000000000000000000) // `transferFrom(address,address,uint256)`. // Perform the transfer, reverting upon failure. if iszero( and( // The arguments of `and` are evaluated from right to left. or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing. call(gas(), token, 0, 0x1c, 0x64, 0x00, 0x20) ) ) { mstore(0x00, 0x7939f424) // `TransferFromFailed()`. revert(0x1c, 0x04) } mstore(0x60, 0) // Restore the zero slot to zero. mstore(0x40, m) // Restore the free memory pointer. } } /// @dev Sends all of ERC20 `token` from `from` to `to`. /// Reverts upon failure. /// /// The `from` account must have their entire balance approved for /// the current contract to manage. function safeTransferAllFrom(address token, address from, address to) internal returns (uint256 amount) { /// @solidity memory-safe-assembly assembly { let m := mload(0x40) // Cache the free memory pointer. mstore(0x40, to) // Store the `to` argument. mstore(0x2c, shl(96, from)) // Store the `from` argument. mstore(0x0c, 0x70a08231000000000000000000000000) // `balanceOf(address)`. // Read the balance, reverting upon failure. if iszero( and( // The arguments of `and` are evaluated from right to left. gt(returndatasize(), 0x1f), // At least 32 bytes returned. staticcall(gas(), token, 0x1c, 0x24, 0x60, 0x20) ) ) { mstore(0x00, 0x7939f424) // `TransferFromFailed()`. revert(0x1c, 0x04) } mstore(0x00, 0x23b872dd) // `transferFrom(address,address,uint256)`. amount := mload(0x60) // The `amount` is already at 0x60. We'll need to return it. // Perform the transfer, reverting upon failure. if iszero( and( // The arguments of `and` are evaluated from right to left. or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing. call(gas(), token, 0, 0x1c, 0x64, 0x00, 0x20) ) ) { mstore(0x00, 0x7939f424) // `TransferFromFailed()`. revert(0x1c, 0x04) } mstore(0x60, 0) // Restore the zero slot to zero. mstore(0x40, m) // Restore the free memory pointer. } } /// @dev Sends `amount` of ERC20 `token` from the current contract to `to`. /// Reverts upon failure. function safeTransfer(address token, address to, uint256 amount) internal { /// @solidity memory-safe-assembly assembly { mstore(0x14, to) // Store the `to` argument. mstore(0x34, amount) // Store the `amount` argument. mstore(0x00, 0xa9059cbb000000000000000000000000) // `transfer(address,uint256)`. // Perform the transfer, reverting upon failure. if iszero( and( // The arguments of `and` are evaluated from right to left. or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing. call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20) ) ) { mstore(0x00, 0x90b8ec18) // `TransferFailed()`. revert(0x1c, 0x04) } mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten. } } /// @dev Sends all of ERC20 `token` from the current contract to `to`. /// Reverts upon failure. function safeTransferAll(address token, address to) internal returns (uint256 amount) { /// @solidity memory-safe-assembly assembly { mstore(0x00, 0x70a08231) // Store the function selector of `balanceOf(address)`. mstore(0x20, address()) // Store the address of the current contract. // Read the balance, reverting upon failure. if iszero( and( // The arguments of `and` are evaluated from right to left. gt(returndatasize(), 0x1f), // At least 32 bytes returned. staticcall(gas(), token, 0x1c, 0x24, 0x34, 0x20) ) ) { mstore(0x00, 0x90b8ec18) // `TransferFailed()`. revert(0x1c, 0x04) } mstore(0x14, to) // Store the `to` argument. amount := mload(0x34) // The `amount` is already at 0x34. We'll need to return it. mstore(0x00, 0xa9059cbb000000000000000000000000) // `transfer(address,uint256)`. // Perform the transfer, reverting upon failure. if iszero( and( // The arguments of `and` are evaluated from right to left. or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing. call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20) ) ) { mstore(0x00, 0x90b8ec18) // `TransferFailed()`. revert(0x1c, 0x04) } mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten. } } /// @dev Sets `amount` of ERC20 `token` for `to` to manage on behalf of the current contract. /// Reverts upon failure. function safeApprove(address token, address to, uint256 amount) internal { /// @solidity memory-safe-assembly assembly { mstore(0x14, to) // Store the `to` argument. mstore(0x34, amount) // Store the `amount` argument. mstore(0x00, 0x095ea7b3000000000000000000000000) // `approve(address,uint256)`. // Perform the approval, reverting upon failure. if iszero( and( // The arguments of `and` are evaluated from right to left. or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing. call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20) ) ) { mstore(0x00, 0x3e3f8f73) // `ApproveFailed()`. revert(0x1c, 0x04) } mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten. } } /// @dev Sets `amount` of ERC20 `token` for `to` to manage on behalf of the current contract. /// If the initial attempt to approve fails, attempts to reset the approved amount to zero, /// then retries the approval again (some tokens, e.g. USDT, requires this). /// Reverts upon failure. function safeApproveWithRetry(address token, address to, uint256 amount) internal { /// @solidity memory-safe-assembly assembly { mstore(0x14, to) // Store the `to` argument. mstore(0x34, amount) // Store the `amount` argument. mstore(0x00, 0x095ea7b3000000000000000000000000) // `approve(address,uint256)`. // Perform the approval, retrying upon failure. if iszero( and( // The arguments of `and` are evaluated from right to left. or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing. call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20) ) ) { mstore(0x34, 0) // Store 0 for the `amount`. mstore(0x00, 0x095ea7b3000000000000000000000000) // `approve(address,uint256)`. pop(call(gas(), token, 0, 0x10, 0x44, codesize(), 0x00)) // Reset the approval. mstore(0x34, amount) // Store back the original `amount`. // Retry the approval, reverting upon failure. if iszero( and( or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing. call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20) ) ) { mstore(0x00, 0x3e3f8f73) // `ApproveFailed()`. revert(0x1c, 0x04) } } mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten. } } /// @dev Returns the amount of ERC20 `token` owned by `account`. /// Returns zero if the `token` does not exist. function balanceOf(address token, address account) internal view returns (uint256 amount) { /// @solidity memory-safe-assembly assembly { mstore(0x14, account) // Store the `account` argument. mstore(0x00, 0x70a08231000000000000000000000000) // `balanceOf(address)`. amount := mul( mload(0x20), and( // The arguments of `and` are evaluated from right to left. gt(returndatasize(), 0x1f), // At least 32 bytes returned. staticcall(gas(), token, 0x10, 0x24, 0x20, 0x20) ) ) } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; /// @notice Library for converting numbers into strings and other string operations. /// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/LibString.sol) /// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/LibString.sol) /// /// @dev Note: /// For performance and bytecode compactness, most of the string operations are restricted to /// byte strings (7-bit ASCII), except where otherwise specified. /// Usage of byte string operations on charsets with runes spanning two or more bytes /// can lead to undefined behavior. library LibString { /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* CUSTOM ERRORS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev The length of the output is too small to contain all the hex digits. error HexLengthInsufficient(); /// @dev The length of the string is more than 32 bytes. error TooBigForSmallString(); /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* CONSTANTS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev The constant returned when the `search` is not found in the string. uint256 internal constant NOT_FOUND = type(uint256).max; /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* DECIMAL OPERATIONS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Returns the base 10 decimal representation of `value`. function toString(uint256 value) internal pure returns (string memory str) { /// @solidity memory-safe-assembly assembly { // The maximum value of a uint256 contains 78 digits (1 byte per digit), but // we allocate 0xa0 bytes to keep the free memory pointer 32-byte word aligned. // We will need 1 word for the trailing zeros padding, 1 word for the length, // and 3 words for a maximum of 78 digits. str := add(mload(0x40), 0x80) // Update the free memory pointer to allocate. mstore(0x40, add(str, 0x20)) // Zeroize the slot after the string. mstore(str, 0) // Cache the end of the memory to calculate the length later. let end := str let w := not(0) // Tsk. // We write the string from rightmost digit to leftmost digit. // The following is essentially a do-while loop that also handles the zero case. for { let temp := value } 1 {} { str := add(str, w) // `sub(str, 1)`. // Write the character to the pointer. // The ASCII index of the '0' character is 48. mstore8(str, add(48, mod(temp, 10))) // Keep dividing `temp` until zero. temp := div(temp, 10) if iszero(temp) { break } } let length := sub(end, str) // Move the pointer 32 bytes leftwards to make room for the length. str := sub(str, 0x20) // Store the length. mstore(str, length) } } /// @dev Returns the base 10 decimal representation of `value`. function toString(int256 value) internal pure returns (string memory str) { if (value >= 0) { return toString(uint256(value)); } unchecked { str = toString(~uint256(value) + 1); } /// @solidity memory-safe-assembly assembly { // We still have some spare memory space on the left, // as we have allocated 3 words (96 bytes) for up to 78 digits. let length := mload(str) // Load the string length. mstore(str, 0x2d) // Store the '-' character. str := sub(str, 1) // Move back the string pointer by a byte. mstore(str, add(length, 1)) // Update the string length. } } /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* HEXADECIMAL OPERATIONS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Returns the hexadecimal representation of `value`, /// left-padded to an input length of `length` bytes. /// The output is prefixed with "0x" encoded using 2 hexadecimal digits per byte, /// giving a total length of `length * 2 + 2` bytes. /// Reverts if `length` is too small for the output to contain all the digits. function toHexString(uint256 value, uint256 length) internal pure returns (string memory str) { str = toHexStringNoPrefix(value, length); /// @solidity memory-safe-assembly assembly { let strLength := add(mload(str), 2) // Compute the length. mstore(str, 0x3078) // Write the "0x" prefix. str := sub(str, 2) // Move the pointer. mstore(str, strLength) // Write the length. } } /// @dev Returns the hexadecimal representation of `value`, /// left-padded to an input length of `length` bytes. /// The output is prefixed with "0x" encoded using 2 hexadecimal digits per byte, /// giving a total length of `length * 2` bytes. /// Reverts if `length` is too small for the output to contain all the digits. function toHexStringNoPrefix(uint256 value, uint256 length) internal pure returns (string memory str) { /// @solidity memory-safe-assembly assembly { // We need 0x20 bytes for the trailing zeros padding, `length * 2` bytes // for the digits, 0x02 bytes for the prefix, and 0x20 bytes for the length. // We add 0x20 to the total and round down to a multiple of 0x20. // (0x20 + 0x20 + 0x02 + 0x20) = 0x62. str := add(mload(0x40), and(add(shl(1, length), 0x42), not(0x1f))) // Allocate the memory. mstore(0x40, add(str, 0x20)) // Zeroize the slot after the string. mstore(str, 0) // Cache the end to calculate the length later. let end := str // Store "0123456789abcdef" in scratch space. mstore(0x0f, 0x30313233343536373839616263646566) let start := sub(str, add(length, length)) let w := not(1) // Tsk. let temp := value // We write the string from rightmost digit to leftmost digit. // The following is essentially a do-while loop that also handles the zero case. for {} 1 {} { str := add(str, w) // `sub(str, 2)`. mstore8(add(str, 1), mload(and(temp, 15))) mstore8(str, mload(and(shr(4, temp), 15))) temp := shr(8, temp) if iszero(xor(str, start)) { break } } if temp { mstore(0x00, 0x2194895a) // `HexLengthInsufficient()`. revert(0x1c, 0x04) } // Compute the string's length. let strLength := sub(end, str) // Move the pointer and write the length. str := sub(str, 0x20) mstore(str, strLength) } } /// @dev Returns the hexadecimal representation of `value`. /// The output is prefixed with "0x" and encoded using 2 hexadecimal digits per byte. /// As address are 20 bytes long, the output will left-padded to have /// a length of `20 * 2 + 2` bytes. function toHexString(uint256 value) internal pure returns (string memory str) { str = toHexStringNoPrefix(value); /// @solidity memory-safe-assembly assembly { let strLength := add(mload(str), 2) // Compute the length. mstore(str, 0x3078) // Write the "0x" prefix. str := sub(str, 2) // Move the pointer. mstore(str, strLength) // Write the length. } } /// @dev Returns the hexadecimal representation of `value`. /// The output is prefixed with "0x". /// The output excludes leading "0" from the `toHexString` output. /// `0x00: "0x0", 0x01: "0x1", 0x12: "0x12", 0x123: "0x123"`. function toMinimalHexString(uint256 value) internal pure returns (string memory str) { str = toHexStringNoPrefix(value); /// @solidity memory-safe-assembly assembly { let o := eq(byte(0, mload(add(str, 0x20))), 0x30) // Whether leading zero is present. let strLength := add(mload(str), 2) // Compute the length. mstore(add(str, o), 0x3078) // Write the "0x" prefix, accounting for leading zero. str := sub(add(str, o), 2) // Move the pointer, accounting for leading zero. mstore(str, sub(strLength, o)) // Write the length, accounting for leading zero. } } /// @dev Returns the hexadecimal representation of `value`. /// The output excludes leading "0" from the `toHexStringNoPrefix` output. /// `0x00: "0", 0x01: "1", 0x12: "12", 0x123: "123"`. function toMinimalHexStringNoPrefix(uint256 value) internal pure returns (string memory str) { str = toHexStringNoPrefix(value); /// @solidity memory-safe-assembly assembly { let o := eq(byte(0, mload(add(str, 0x20))), 0x30) // Whether leading zero is present. let strLength := mload(str) // Get the length. str := add(str, o) // Move the pointer, accounting for leading zero. mstore(str, sub(strLength, o)) // Write the length, accounting for leading zero. } } /// @dev Returns the hexadecimal representation of `value`. /// The output is encoded using 2 hexadecimal digits per byte. /// As address are 20 bytes long, the output will left-padded to have /// a length of `20 * 2` bytes. function toHexStringNoPrefix(uint256 value) internal pure returns (string memory str) { /// @solidity memory-safe-assembly assembly { // We need 0x20 bytes for the trailing zeros padding, 0x20 bytes for the length, // 0x02 bytes for the prefix, and 0x40 bytes for the digits. // The next multiple of 0x20 above (0x20 + 0x20 + 0x02 + 0x40) is 0xa0. str := add(mload(0x40), 0x80) // Allocate the memory. mstore(0x40, add(str, 0x20)) // Zeroize the slot after the string. mstore(str, 0) // Cache the end to calculate the length later. let end := str // Store "0123456789abcdef" in scratch space. mstore(0x0f, 0x30313233343536373839616263646566) let w := not(1) // Tsk. // We write the string from rightmost digit to leftmost digit. // The following is essentially a do-while loop that also handles the zero case. for { let temp := value } 1 {} { str := add(str, w) // `sub(str, 2)`. mstore8(add(str, 1), mload(and(temp, 15))) mstore8(str, mload(and(shr(4, temp), 15))) temp := shr(8, temp) if iszero(temp) { break } } // Compute the string's length. let strLength := sub(end, str) // Move the pointer and write the length. str := sub(str, 0x20) mstore(str, strLength) } } /// @dev Returns the hexadecimal representation of `value`. /// The output is prefixed with "0x", encoded using 2 hexadecimal digits per byte, /// and the alphabets are capitalized conditionally according to /// https://eips.ethereum.org/EIPS/eip-55 function toHexStringChecksummed(address value) internal pure returns (string memory str) { str = toHexString(value); /// @solidity memory-safe-assembly assembly { let mask := shl(6, div(not(0), 255)) // `0b010000000100000000 ...` let o := add(str, 0x22) let hashed := and(keccak256(o, 40), mul(34, mask)) // `0b10001000 ... ` let t := shl(240, 136) // `0b10001000 << 240` for { let i := 0 } 1 {} { mstore(add(i, i), mul(t, byte(i, hashed))) i := add(i, 1) if eq(i, 20) { break } } mstore(o, xor(mload(o), shr(1, and(mload(0x00), and(mload(o), mask))))) o := add(o, 0x20) mstore(o, xor(mload(o), shr(1, and(mload(0x20), and(mload(o), mask))))) } } /// @dev Returns the hexadecimal representation of `value`. /// The output is prefixed with "0x" and encoded using 2 hexadecimal digits per byte. function toHexString(address value) internal pure returns (string memory str) { str = toHexStringNoPrefix(value); /// @solidity memory-safe-assembly assembly { let strLength := add(mload(str), 2) // Compute the length. mstore(str, 0x3078) // Write the "0x" prefix. str := sub(str, 2) // Move the pointer. mstore(str, strLength) // Write the length. } } /// @dev Returns the hexadecimal representation of `value`. /// The output is encoded using 2 hexadecimal digits per byte. function toHexStringNoPrefix(address value) internal pure returns (string memory str) { /// @solidity memory-safe-assembly assembly { str := mload(0x40) // Allocate the memory. // We need 0x20 bytes for the trailing zeros padding, 0x20 bytes for the length, // 0x02 bytes for the prefix, and 0x28 bytes for the digits. // The next multiple of 0x20 above (0x20 + 0x20 + 0x02 + 0x28) is 0x80. mstore(0x40, add(str, 0x80)) // Store "0123456789abcdef" in scratch space. mstore(0x0f, 0x30313233343536373839616263646566) str := add(str, 2) mstore(str, 40) let o := add(str, 0x20) mstore(add(o, 40), 0) value := shl(96, value) // We write the string from rightmost digit to leftmost digit. // The following is essentially a do-while loop that also handles the zero case. for { let i := 0 } 1 {} { let p := add(o, add(i, i)) let temp := byte(i, value) mstore8(add(p, 1), mload(and(temp, 15))) mstore8(p, mload(shr(4, temp))) i := add(i, 1) if eq(i, 20) { break } } } } /// @dev Returns the hex encoded string from the raw bytes. /// The output is encoded using 2 hexadecimal digits per byte. function toHexString(bytes memory raw) internal pure returns (string memory str) { str = toHexStringNoPrefix(raw); /// @solidity memory-safe-assembly assembly { let strLength := add(mload(str), 2) // Compute the length. mstore(str, 0x3078) // Write the "0x" prefix. str := sub(str, 2) // Move the pointer. mstore(str, strLength) // Write the length. } } /// @dev Returns the hex encoded string from the raw bytes. /// The output is encoded using 2 hexadecimal digits per byte. function toHexStringNoPrefix(bytes memory raw) internal pure returns (string memory str) { /// @solidity memory-safe-assembly assembly { let length := mload(raw) str := add(mload(0x40), 2) // Skip 2 bytes for the optional prefix. mstore(str, add(length, length)) // Store the length of the output. // Store "0123456789abcdef" in scratch space. mstore(0x0f, 0x30313233343536373839616263646566) let o := add(str, 0x20) let end := add(raw, length) for {} iszero(eq(raw, end)) {} { raw := add(raw, 1) mstore8(add(o, 1), mload(and(mload(raw), 15))) mstore8(o, mload(and(shr(4, mload(raw)), 15))) o := add(o, 2) } mstore(o, 0) // Zeroize the slot after the string. mstore(0x40, add(o, 0x20)) // Allocate the memory. } } /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* RUNE STRING OPERATIONS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Returns the number of UTF characters in the string. function runeCount(string memory s) internal pure returns (uint256 result) { /// @solidity memory-safe-assembly assembly { if mload(s) { mstore(0x00, div(not(0), 255)) mstore(0x20, 0x0202020202020202020202020202020202020202020202020303030304040506) let o := add(s, 0x20) let end := add(o, mload(s)) for { result := 1 } 1 { result := add(result, 1) } { o := add(o, byte(0, mload(shr(250, mload(o))))) if iszero(lt(o, end)) { break } } } } } /// @dev Returns if this string is a 7-bit ASCII string. /// (i.e. all characters codes are in [0..127]) function is7BitASCII(string memory s) internal pure returns (bool result) { /// @solidity memory-safe-assembly assembly { let mask := shl(7, div(not(0), 255)) result := 1 let n := mload(s) if n { let o := add(s, 0x20) let end := add(o, n) let last := mload(end) mstore(end, 0) for {} 1 {} { if and(mask, mload(o)) { result := 0 break } o := add(o, 0x20) if iszero(lt(o, end)) { break } } mstore(end, last) } } } /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* BYTE STRING OPERATIONS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ // For performance and bytecode compactness, byte string operations are restricted // to 7-bit ASCII strings. All offsets are byte offsets, not UTF character offsets. // Usage of byte string operations on charsets with runes spanning two or more bytes // can lead to undefined behavior. /// @dev Returns `subject` all occurrences of `search` replaced with `replacement`. function replace(string memory subject, string memory search, string memory replacement) internal pure returns (string memory result) { /// @solidity memory-safe-assembly assembly { let subjectLength := mload(subject) let searchLength := mload(search) let replacementLength := mload(replacement) subject := add(subject, 0x20) search := add(search, 0x20) replacement := add(replacement, 0x20) result := add(mload(0x40), 0x20) let subjectEnd := add(subject, subjectLength) if iszero(gt(searchLength, subjectLength)) { let subjectSearchEnd := add(sub(subjectEnd, searchLength), 1) let h := 0 if iszero(lt(searchLength, 0x20)) { h := keccak256(search, searchLength) } let m := shl(3, sub(0x20, and(searchLength, 0x1f))) let s := mload(search) for {} 1 {} { let t := mload(subject) // Whether the first `searchLength % 32` bytes of // `subject` and `search` matches. if iszero(shr(m, xor(t, s))) { if h { if iszero(eq(keccak256(subject, searchLength), h)) { mstore(result, t) result := add(result, 1) subject := add(subject, 1) if iszero(lt(subject, subjectSearchEnd)) { break } continue } } // Copy the `replacement` one word at a time. for { let o := 0 } 1 {} { mstore(add(result, o), mload(add(replacement, o))) o := add(o, 0x20) if iszero(lt(o, replacementLength)) { break } } result := add(result, replacementLength) subject := add(subject, searchLength) if searchLength { if iszero(lt(subject, subjectSearchEnd)) { break } continue } } mstore(result, t) result := add(result, 1) subject := add(subject, 1) if iszero(lt(subject, subjectSearchEnd)) { break } } } let resultRemainder := result result := add(mload(0x40), 0x20) let k := add(sub(resultRemainder, result), sub(subjectEnd, subject)) // Copy the rest of the string one word at a time. for {} lt(subject, subjectEnd) {} { mstore(resultRemainder, mload(subject)) resultRemainder := add(resultRemainder, 0x20) subject := add(subject, 0x20) } result := sub(result, 0x20) let last := add(add(result, 0x20), k) // Zeroize the slot after the string. mstore(last, 0) mstore(0x40, add(last, 0x20)) // Allocate the memory. mstore(result, k) // Store the length. } } /// @dev Returns the byte index of the first location of `search` in `subject`, /// searching from left to right, starting from `from`. /// Returns `NOT_FOUND` (i.e. `type(uint256).max`) if the `search` is not found. function indexOf(string memory subject, string memory search, uint256 from) internal pure returns (uint256 result) { /// @solidity memory-safe-assembly assembly { for { let subjectLength := mload(subject) } 1 {} { if iszero(mload(search)) { if iszero(gt(from, subjectLength)) { result := from break } result := subjectLength break } let searchLength := mload(search) let subjectStart := add(subject, 0x20) result := not(0) // Initialize to `NOT_FOUND`. subject := add(subjectStart, from) let end := add(sub(add(subjectStart, subjectLength), searchLength), 1) let m := shl(3, sub(0x20, and(searchLength, 0x1f))) let s := mload(add(search, 0x20)) if iszero(and(lt(subject, end), lt(from, subjectLength))) { break } if iszero(lt(searchLength, 0x20)) { for { let h := keccak256(add(search, 0x20), searchLength) } 1 {} { if iszero(shr(m, xor(mload(subject), s))) { if eq(keccak256(subject, searchLength), h) { result := sub(subject, subjectStart) break } } subject := add(subject, 1) if iszero(lt(subject, end)) { break } } break } for {} 1 {} { if iszero(shr(m, xor(mload(subject), s))) { result := sub(subject, subjectStart) break } subject := add(subject, 1) if iszero(lt(subject, end)) { break } } break } } } /// @dev Returns the byte index of the first location of `search` in `subject`, /// searching from left to right. /// Returns `NOT_FOUND` (i.e. `type(uint256).max`) if the `search` is not found. function indexOf(string memory subject, string memory search) internal pure returns (uint256 result) { result = indexOf(subject, search, 0); } /// @dev Returns the byte index of the first location of `search` in `subject`, /// searching from right to left, starting from `from`. /// Returns `NOT_FOUND` (i.e. `type(uint256).max`) if the `search` is not found. function lastIndexOf(string memory subject, string memory search, uint256 from) internal pure returns (uint256 result) { /// @solidity memory-safe-assembly assembly { for {} 1 {} { result := not(0) // Initialize to `NOT_FOUND`. let searchLength := mload(search) if gt(searchLength, mload(subject)) { break } let w := result let fromMax := sub(mload(subject), searchLength) if iszero(gt(fromMax, from)) { from := fromMax } let end := add(add(subject, 0x20), w) subject := add(add(subject, 0x20), from) if iszero(gt(subject, end)) { break } // As this function is not too often used, // we shall simply use keccak256 for smaller bytecode size. for { let h := keccak256(add(search, 0x20), searchLength) } 1 {} { if eq(keccak256(subject, searchLength), h) { result := sub(subject, add(end, 1)) break } subject := add(subject, w) // `sub(subject, 1)`. if iszero(gt(subject, end)) { break } } break } } } /// @dev Returns the byte index of the first location of `search` in `subject`, /// searching from right to left. /// Returns `NOT_FOUND` (i.e. `type(uint256).max`) if the `search` is not found. function lastIndexOf(string memory subject, string memory search) internal pure returns (uint256 result) { result = lastIndexOf(subject, search, uint256(int256(-1))); } /// @dev Returns true if `search` is found in `subject`, false otherwise. function contains(string memory subject, string memory search) internal pure returns (bool) { return indexOf(subject, search) != NOT_FOUND; } /// @dev Returns whether `subject` starts with `search`. function startsWith(string memory subject, string memory search) internal pure returns (bool result) { /// @solidity memory-safe-assembly assembly { let searchLength := mload(search) // Just using keccak256 directly is actually cheaper. // forgefmt: disable-next-item result := and( iszero(gt(searchLength, mload(subject))), eq( keccak256(add(subject, 0x20), searchLength), keccak256(add(search, 0x20), searchLength) ) ) } } /// @dev Returns whether `subject` ends with `search`. function endsWith(string memory subject, string memory search) internal pure returns (bool result) { /// @solidity memory-safe-assembly assembly { let searchLength := mload(search) let subjectLength := mload(subject) // Whether `search` is not longer than `subject`. let withinRange := iszero(gt(searchLength, subjectLength)) // Just using keccak256 directly is actually cheaper. // forgefmt: disable-next-item result := and( withinRange, eq( keccak256( // `subject + 0x20 + max(subjectLength - searchLength, 0)`. add(add(subject, 0x20), mul(withinRange, sub(subjectLength, searchLength))), searchLength ), keccak256(add(search, 0x20), searchLength) ) ) } } /// @dev Returns `subject` repeated `times`. function repeat(string memory subject, uint256 times) internal pure returns (string memory result) { /// @solidity memory-safe-assembly assembly { let subjectLength := mload(subject) if iszero(or(iszero(times), iszero(subjectLength))) { subject := add(subject, 0x20) result := mload(0x40) let output := add(result, 0x20) for {} 1 {} { // Copy the `subject` one word at a time. for { let o := 0 } 1 {} { mstore(add(output, o), mload(add(subject, o))) o := add(o, 0x20) if iszero(lt(o, subjectLength)) { break } } output := add(output, subjectLength) times := sub(times, 1) if iszero(times) { break } } mstore(output, 0) // Zeroize the slot after the string. let resultLength := sub(output, add(result, 0x20)) mstore(result, resultLength) // Store the length. // Allocate the memory. mstore(0x40, add(result, add(resultLength, 0x20))) } } } /// @dev Returns a copy of `subject` sliced from `start` to `end` (exclusive). /// `start` and `end` are byte offsets. function slice(string memory subject, uint256 start, uint256 end) internal pure returns (string memory result) { /// @solidity memory-safe-assembly assembly { let subjectLength := mload(subject) if iszero(gt(subjectLength, end)) { end := subjectLength } if iszero(gt(subjectLength, start)) { start := subjectLength } if lt(start, end) { result := mload(0x40) let resultLength := sub(end, start) mstore(result, resultLength) subject := add(subject, start) let w := not(0x1f) // Copy the `subject` one word at a time, backwards. for { let o := and(add(resultLength, 0x1f), w) } 1 {} { mstore(add(result, o), mload(add(subject, o))) o := add(o, w) // `sub(o, 0x20)`. if iszero(o) { break } } // Zeroize the slot after the string. mstore(add(add(result, 0x20), resultLength), 0) // Allocate memory for the length and the bytes, // rounded up to a multiple of 32. mstore(0x40, add(result, and(add(resultLength, 0x3f), w))) } } } /// @dev Returns a copy of `subject` sliced from `start` to the end of the string. /// `start` is a byte offset. function slice(string memory subject, uint256 start) internal pure returns (string memory result) { result = slice(subject, start, uint256(int256(-1))); } /// @dev Returns all the indices of `search` in `subject`. /// The indices are byte offsets. function indicesOf(string memory subject, string memory search) internal pure returns (uint256[] memory result) { /// @solidity memory-safe-assembly assembly { let subjectLength := mload(subject) let searchLength := mload(search) if iszero(gt(searchLength, subjectLength)) { subject := add(subject, 0x20) search := add(search, 0x20) result := add(mload(0x40), 0x20) let subjectStart := subject let subjectSearchEnd := add(sub(add(subject, subjectLength), searchLength), 1) let h := 0 if iszero(lt(searchLength, 0x20)) { h := keccak256(search, searchLength) } let m := shl(3, sub(0x20, and(searchLength, 0x1f))) let s := mload(search) for {} 1 {} { let t := mload(subject) // Whether the first `searchLength % 32` bytes of // `subject` and `search` matches. if iszero(shr(m, xor(t, s))) { if h { if iszero(eq(keccak256(subject, searchLength), h)) { subject := add(subject, 1) if iszero(lt(subject, subjectSearchEnd)) { break } continue } } // Append to `result`. mstore(result, sub(subject, subjectStart)) result := add(result, 0x20) // Advance `subject` by `searchLength`. subject := add(subject, searchLength) if searchLength { if iszero(lt(subject, subjectSearchEnd)) { break } continue } } subject := add(subject, 1) if iszero(lt(subject, subjectSearchEnd)) { break } } let resultEnd := result // Assign `result` to the free memory pointer. result := mload(0x40) // Store the length of `result`. mstore(result, shr(5, sub(resultEnd, add(result, 0x20)))) // Allocate memory for result. // We allocate one more word, so this array can be recycled for {split}. mstore(0x40, add(resultEnd, 0x20)) } } } /// @dev Returns a arrays of strings based on the `delimiter` inside of the `subject` string. function split(string memory subject, string memory delimiter) internal pure returns (string[] memory result) { uint256[] memory indices = indicesOf(subject, delimiter); /// @solidity memory-safe-assembly assembly { let w := not(0x1f) let indexPtr := add(indices, 0x20) let indicesEnd := add(indexPtr, shl(5, add(mload(indices), 1))) mstore(add(indicesEnd, w), mload(subject)) mstore(indices, add(mload(indices), 1)) let prevIndex := 0 for {} 1 {} { let index := mload(indexPtr) mstore(indexPtr, 0x60) if iszero(eq(index, prevIndex)) { let element := mload(0x40) let elementLength := sub(index, prevIndex) mstore(element, elementLength) // Copy the `subject` one word at a time, backwards. for { let o := and(add(elementLength, 0x1f), w) } 1 {} { mstore(add(element, o), mload(add(add(subject, prevIndex), o))) o := add(o, w) // `sub(o, 0x20)`. if iszero(o) { break } } // Zeroize the slot after the string. mstore(add(add(element, 0x20), elementLength), 0) // Allocate memory for the length and the bytes, // rounded up to a multiple of 32. mstore(0x40, add(element, and(add(elementLength, 0x3f), w))) // Store the `element` into the array. mstore(indexPtr, element) } prevIndex := add(index, mload(delimiter)) indexPtr := add(indexPtr, 0x20) if iszero(lt(indexPtr, indicesEnd)) { break } } result := indices if iszero(mload(delimiter)) { result := add(indices, 0x20) mstore(result, sub(mload(indices), 2)) } } } /// @dev Returns a concatenated string of `a` and `b`. /// Cheaper than `string.concat()` and does not de-align the free memory pointer. function concat(string memory a, string memory b) internal pure returns (string memory result) { /// @solidity memory-safe-assembly assembly { let w := not(0x1f) result := mload(0x40) let aLength := mload(a) // Copy `a` one word at a time, backwards. for { let o := and(add(aLength, 0x20), w) } 1 {} { mstore(add(result, o), mload(add(a, o))) o := add(o, w) // `sub(o, 0x20)`. if iszero(o) { break } } let bLength := mload(b) let output := add(result, aLength) // Copy `b` one word at a time, backwards. for { let o := and(add(bLength, 0x20), w) } 1 {} { mstore(add(output, o), mload(add(b, o))) o := add(o, w) // `sub(o, 0x20)`. if iszero(o) { break } } let totalLength := add(aLength, bLength) let last := add(add(result, 0x20), totalLength) // Zeroize the slot after the string. mstore(last, 0) // Stores the length. mstore(result, totalLength) // Allocate memory for the length and the bytes, // rounded up to a multiple of 32. mstore(0x40, and(add(last, 0x1f), w)) } } /// @dev Returns a copy of the string in either lowercase or UPPERCASE. /// WARNING! This function is only compatible with 7-bit ASCII strings. function toCase(string memory subject, bool toUpper) internal pure returns (string memory result) { /// @solidity memory-safe-assembly assembly { let length := mload(subject) if length { result := add(mload(0x40), 0x20) subject := add(subject, 1) let flags := shl(add(70, shl(5, toUpper)), 0x3ffffff) let w := not(0) for { let o := length } 1 {} { o := add(o, w) let b := and(0xff, mload(add(subject, o))) mstore8(add(result, o), xor(b, and(shr(b, flags), 0x20))) if iszero(o) { break } } result := mload(0x40) mstore(result, length) // Store the length. let last := add(add(result, 0x20), length) mstore(last, 0) // Zeroize the slot after the string. mstore(0x40, add(last, 0x20)) // Allocate the memory. } } } /// @dev Returns a string from a small bytes32 string. /// `s` must be null-terminated, or behavior will be undefined. function fromSmallString(bytes32 s) internal pure returns (string memory result) { /// @solidity memory-safe-assembly assembly { result := mload(0x40) let n := 0 for {} byte(n, s) { n := add(n, 1) } {} // Scan for '\0'. mstore(result, n) let o := add(result, 0x20) mstore(o, s) mstore(add(o, n), 0) mstore(0x40, add(result, 0x40)) } } /// @dev Returns the small string, with all bytes after the first null byte zeroized. function normalizeSmallString(bytes32 s) internal pure returns (bytes32 result) { /// @solidity memory-safe-assembly assembly { for {} byte(result, s) { result := add(result, 1) } {} // Scan for '\0'. mstore(0x00, s) mstore(result, 0x00) result := mload(0x00) } } /// @dev Returns the string as a normalized null-terminated small string. function toSmallString(string memory s) internal pure returns (bytes32 result) { /// @solidity memory-safe-assembly assembly { result := mload(s) if iszero(lt(result, 33)) { mstore(0x00, 0xec92f9a3) // `TooBigForSmallString()`. revert(0x1c, 0x04) } result := shl(shl(3, sub(32, result)), mload(add(s, result))) } } /// @dev Returns a lowercased copy of the string. /// WARNING! This function is only compatible with 7-bit ASCII strings. function lower(string memory subject) internal pure returns (string memory result) { result = toCase(subject, false); } /// @dev Returns an UPPERCASED copy of the string. /// WARNING! This function is only compatible with 7-bit ASCII strings. function upper(string memory subject) internal pure returns (string memory result) { result = toCase(subject, true); } /// @dev Escapes the string to be used within HTML tags. function escapeHTML(string memory s) internal pure returns (string memory result) { /// @solidity memory-safe-assembly assembly { let end := add(s, mload(s)) result := add(mload(0x40), 0x20) // Store the bytes of the packed offsets and strides into the scratch space. // `packed = (stride << 5) | offset`. Max offset is 20. Max stride is 6. mstore(0x1f, 0x900094) mstore(0x08, 0xc0000000a6ab) // Store ""&'<>" into the scratch space. mstore(0x00, shl(64, 0x2671756f743b26616d703b262333393b266c743b2667743b)) for {} iszero(eq(s, end)) {} { s := add(s, 1) let c := and(mload(s), 0xff) // Not in `["\"","'","&","<",">"]`. if iszero(and(shl(c, 1), 0x500000c400000000)) { mstore8(result, c) result := add(result, 1) continue } let t := shr(248, mload(c)) mstore(result, mload(and(t, 0x1f))) result := add(result, shr(5, t)) } let last := result mstore(last, 0) // Zeroize the slot after the string. result := mload(0x40) mstore(result, sub(last, add(result, 0x20))) // Store the length. mstore(0x40, add(last, 0x20)) // Allocate the memory. } } /// @dev Escapes the string to be used within double-quotes in a JSON. /// If `addDoubleQuotes` is true, the result will be enclosed in double-quotes. function escapeJSON(string memory s, bool addDoubleQuotes) internal pure returns (string memory result) { /// @solidity memory-safe-assembly assembly { let end := add(s, mload(s)) result := add(mload(0x40), 0x20) if addDoubleQuotes { mstore8(result, 34) result := add(1, result) } // Store "\\u0000" in scratch space. // Store "0123456789abcdef" in scratch space. // Also, store `{0x08:"b", 0x09:"t", 0x0a:"n", 0x0c:"f", 0x0d:"r"}`. // into the scratch space. mstore(0x15, 0x5c75303030303031323334353637383961626364656662746e006672) // Bitmask for detecting `["\"","\\"]`. let e := or(shl(0x22, 1), shl(0x5c, 1)) for {} iszero(eq(s, end)) {} { s := add(s, 1) let c := and(mload(s), 0xff) if iszero(lt(c, 0x20)) { if iszero(and(shl(c, 1), e)) { // Not in `["\"","\\"]`. mstore8(result, c) result := add(result, 1) continue } mstore8(result, 0x5c) // "\\". mstore8(add(result, 1), c) result := add(result, 2) continue } if iszero(and(shl(c, 1), 0x3700)) { // Not in `["\b","\t","\n","\f","\d"]`. mstore8(0x1d, mload(shr(4, c))) // Hex value. mstore8(0x1e, mload(and(c, 15))) // Hex value. mstore(result, mload(0x19)) // "\\u00XX". result := add(result, 6) continue } mstore8(result, 0x5c) // "\\". mstore8(add(result, 1), mload(add(c, 8))) result := add(result, 2) } if addDoubleQuotes { mstore8(result, 34) result := add(1, result) } let last := result mstore(last, 0) // Zeroize the slot after the string. result := mload(0x40) mstore(result, sub(last, add(result, 0x20))) // Store the length. mstore(0x40, add(last, 0x20)) // Allocate the memory. } } /// @dev Escapes the string to be used within double-quotes in a JSON. function escapeJSON(string memory s) internal pure returns (string memory result) { result = escapeJSON(s, false); } /// @dev Returns whether `a` equals `b`. function eq(string memory a, string memory b) internal pure returns (bool result) { /// @solidity memory-safe-assembly assembly { result := eq(keccak256(add(a, 0x20), mload(a)), keccak256(add(b, 0x20), mload(b))) } } /// @dev Returns whether `a` equals `b`, where `b` is a null-terminated small string. function eqs(string memory a, bytes32 b) internal pure returns (bool result) { /// @solidity memory-safe-assembly assembly { // These should be evaluated on compile time, as far as possible. let m := not(shl(7, div(not(iszero(b)), 255))) // `0x7f7f ...`. let x := not(or(m, or(b, add(m, and(b, m))))) let r := shl(7, iszero(iszero(shr(128, x)))) r := or(r, shl(6, iszero(iszero(shr(64, shr(r, x)))))) r := or(r, shl(5, lt(0xffffffff, shr(r, x)))) r := or(r, shl(4, lt(0xffff, shr(r, x)))) r := or(r, shl(3, lt(0xff, shr(r, x)))) // forgefmt: disable-next-item result := gt(eq(mload(a), add(iszero(x), xor(31, shr(3, r)))), xor(shr(add(8, r), b), shr(add(8, r), mload(add(a, 0x20))))) } } /// @dev Packs a single string with its length into a single word. /// Returns `bytes32(0)` if the length is zero or greater than 31. function packOne(string memory a) internal pure returns (bytes32 result) { /// @solidity memory-safe-assembly assembly { // We don't need to zero right pad the string, // since this is our own custom non-standard packing scheme. result := mul( // Load the length and the bytes. mload(add(a, 0x1f)), // `length != 0 && length < 32`. Abuses underflow. // Assumes that the length is valid and within the block gas limit. lt(sub(mload(a), 1), 0x1f) ) } } /// @dev Unpacks a string packed using {packOne}. /// Returns the empty string if `packed` is `bytes32(0)`. /// If `packed` is not an output of {packOne}, the output behavior is undefined. function unpackOne(bytes32 packed) internal pure returns (string memory result) { /// @solidity memory-safe-assembly assembly { // Grab the free memory pointer. result := mload(0x40) // Allocate 2 words (1 for the length, 1 for the bytes). mstore(0x40, add(result, 0x40)) // Zeroize the length slot. mstore(result, 0) // Store the length and bytes. mstore(add(result, 0x1f), packed) // Right pad with zeroes. mstore(add(add(result, 0x20), mload(result)), 0) } } /// @dev Packs two strings with their lengths into a single word. /// Returns `bytes32(0)` if combined length is zero or greater than 30. function packTwo(string memory a, string memory b) internal pure returns (bytes32 result) { /// @solidity memory-safe-assembly assembly { let aLength := mload(a) // We don't need to zero right pad the strings, // since this is our own custom non-standard packing scheme. result := mul( // Load the length and the bytes of `a` and `b`. or( shl(shl(3, sub(0x1f, aLength)), mload(add(a, aLength))), mload(sub(add(b, 0x1e), aLength)) ), // `totalLength != 0 && totalLength < 31`. Abuses underflow. // Assumes that the lengths are valid and within the block gas limit. lt(sub(add(aLength, mload(b)), 1), 0x1e) ) } } /// @dev Unpacks strings packed using {packTwo}. /// Returns the empty strings if `packed` is `bytes32(0)`. /// If `packed` is not an output of {packTwo}, the output behavior is undefined. function unpackTwo(bytes32 packed) internal pure returns (string memory resultA, string memory resultB) { /// @solidity memory-safe-assembly assembly { // Grab the free memory pointer. resultA := mload(0x40) resultB := add(resultA, 0x40) // Allocate 2 words for each string (1 for the length, 1 for the byte). Total 4 words. mstore(0x40, add(resultB, 0x40)) // Zeroize the length slots. mstore(resultA, 0) mstore(resultB, 0) // Store the lengths and bytes. mstore(add(resultA, 0x1f), packed) mstore(add(resultB, 0x1f), mload(add(add(resultA, 0x20), mload(resultA)))) // Right pad with zeroes. mstore(add(add(resultA, 0x20), mload(resultA)), 0) mstore(add(add(resultB, 0x20), mload(resultB)), 0) } } /// @dev Directly returns `a` without copying. function directReturn(string memory a) internal pure { assembly { // Assumes that the string does not start from the scratch space. let retStart := sub(a, 0x20) let retSize := add(mload(a), 0x40) // Right pad with zeroes. Just in case the string is produced // by a method that doesn't zero right pad. mstore(add(retStart, retSize), 0) // Store the return offset. mstore(retStart, 0x20) // End the transaction, returning the string. return(retStart, retSize) } } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.23; interface PaletteRenderer { function disconnect() external view; function render(uint256 $id) external view returns (string memory); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC721Receiver.sol) pragma solidity ^0.8.20; import {IERC721Receiver} from "../token/ERC721/IERC721Receiver.sol";
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC165.sol) pragma solidity ^0.8.20; import {IERC165} from "../utils/introspection/IERC165.sol";
//SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import {IERC165} from "@openzeppelin/contracts/interfaces/IERC165.sol"; interface IERC404 is IERC165 { error NotFound(); error InvalidTokenId(); error AlreadyExists(); error InvalidRecipient(); error InvalidSender(); error InvalidSpender(); error InvalidOperator(); error UnsafeRecipient(); error RecipientIsERC721TransferExempt(); error Unauthorized(); error InsufficientAllowance(); error DecimalsTooLow(); error PermitDeadlineExpired(); error InvalidSigner(); error InvalidApproval(); error OwnedIndexOverflow(); error MintLimitReached(); error InvalidExemption(); function name() external view returns (string memory); function symbol() external view returns (string memory); function decimals() external view returns (uint8); function totalSupply() external view returns (uint256); function erc20TotalSupply() external view returns (uint256); function erc721TotalSupply() external view returns (uint256); function balanceOf(address owner_) external view returns (uint256); function erc721BalanceOf(address owner_) external view returns (uint256); function erc20BalanceOf(address owner_) external view returns (uint256); function erc721TransferExempt( address account_ ) external view returns (bool); function isApprovedForAll( address owner_, address operator_ ) external view returns (bool); function allowance( address owner_, address spender_ ) external view returns (uint256); function owned(address owner_) external view returns (uint256[] memory); function ownerOf(uint256 id_) external view returns (address erc721Owner); function tokenURI(uint256 id_) external view returns (string memory); function approve( address spender_, uint256 valueOrId_ ) external returns (bool); function erc20Approve( address spender_, uint256 value_ ) external returns (bool); function erc721Approve(address spender_, uint256 id_) external; function setApprovalForAll(address operator_, bool approved_) external; function transferFrom( address from_, address to_, uint256 valueOrId_ ) external returns (bool); function erc20TransferFrom( address from_, address to_, uint256 value_ ) external returns (bool); function erc721TransferFrom( address from_, address to_, uint256 id_ ) external; function transfer(address to_, uint256 amount_) external returns (bool); function getERC721QueueLength() external view returns (uint256); function getERC721TokensInQueue( uint256 start_, uint256 count_ ) external view returns (uint256[] memory); function setSelfERC721TransferExempt(bool state_) external; function safeTransferFrom(address from_, address to_, uint256 id_) external; function safeTransferFrom( address from_, address to_, uint256 id_, bytes calldata data_ ) external; function DOMAIN_SEPARATOR() external view returns (bytes32); function permit( address owner_, address spender_, uint256 value_, uint256 deadline_, uint8 v_, bytes32 r_, bytes32 s_ ) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/structs/DoubleEndedQueue.sol) // Modified by Pandora Labs to support native uint256 operations pragma solidity ^0.8.20; /** * @dev A sequence of items with the ability to efficiently push and pop items (i.e. insert and remove) on both ends of * the sequence (called front and back). Among other access patterns, it can be used to implement efficient LIFO and * FIFO queues. Storage use is optimized, and all operations are O(1) constant time. This includes {clear}, given that * the existing queue contents are left in storage. * * The struct is called `Uint256Deque`. This data structure can only be used in storage, and not in memory. * * ```solidity * DoubleEndedQueue.Uint256Deque queue; * ``` */ library DoubleEndedQueue { /** * @dev An operation (e.g. {front}) couldn't be completed due to the queue being empty. */ error QueueEmpty(); /** * @dev A push operation couldn't be completed due to the queue being full. */ error QueueFull(); /** * @dev An operation (e.g. {at}) couldn't be completed due to an index being out of bounds. */ error QueueOutOfBounds(); /** * @dev Indices are 128 bits so begin and end are packed in a single storage slot for efficient access. * * Struct members have an underscore prefix indicating that they are "private" and should not be read or written to * directly. Use the functions provided below instead. Modifying the struct manually may violate assumptions and * lead to unexpected behavior. * * The first item is at data[begin] and the last item is at data[end - 1]. This range can wrap around. */ struct Uint256Deque { uint128 _begin; uint128 _end; mapping(uint128 index => uint256) _data; } /** * @dev Inserts an item at the end of the queue. * * Reverts with {QueueFull} if the queue is full. */ function pushBack(Uint256Deque storage deque, uint256 value) internal { unchecked { uint128 backIndex = deque._end; if (backIndex + 1 == deque._begin) revert QueueFull(); deque._data[backIndex] = value; deque._end = backIndex + 1; } } /** * @dev Removes the item at the end of the queue and returns it. * * Reverts with {QueueEmpty} if the queue is empty. */ function popBack( Uint256Deque storage deque ) internal returns (uint256 value) { unchecked { uint128 backIndex = deque._end; if (backIndex == deque._begin) revert QueueEmpty(); --backIndex; value = deque._data[backIndex]; delete deque._data[backIndex]; deque._end = backIndex; } } /** * @dev Inserts an item at the beginning of the queue. * * Reverts with {QueueFull} if the queue is full. */ function pushFront(Uint256Deque storage deque, uint256 value) internal { unchecked { uint128 frontIndex = deque._begin - 1; if (frontIndex == deque._end) revert QueueFull(); deque._data[frontIndex] = value; deque._begin = frontIndex; } } /** * @dev Removes the item at the beginning of the queue and returns it. * * Reverts with `QueueEmpty` if the queue is empty. */ function popFront( Uint256Deque storage deque ) internal returns (uint256 value) { unchecked { uint128 frontIndex = deque._begin; if (frontIndex == deque._end) revert QueueEmpty(); value = deque._data[frontIndex]; delete deque._data[frontIndex]; deque._begin = frontIndex + 1; } } /** * @dev Returns the item at the beginning of the queue. * * Reverts with `QueueEmpty` if the queue is empty. */ function front( Uint256Deque storage deque ) internal view returns (uint256 value) { if (empty(deque)) revert QueueEmpty(); return deque._data[deque._begin]; } /** * @dev Returns the item at the end of the queue. * * Reverts with `QueueEmpty` if the queue is empty. */ function back( Uint256Deque storage deque ) internal view returns (uint256 value) { if (empty(deque)) revert QueueEmpty(); unchecked { return deque._data[deque._end - 1]; } } /** * @dev Return the item at a position in the queue given by `index`, with the first item at 0 and last item at * `length(deque) - 1`. * * Reverts with `QueueOutOfBounds` if the index is out of bounds. */ function at( Uint256Deque storage deque, uint256 index ) internal view returns (uint256 value) { if (index >= length(deque)) revert QueueOutOfBounds(); // By construction, length is a uint128, so the check above ensures that index can be safely downcast to uint128 unchecked { return deque._data[deque._begin + uint128(index)]; } } /** * @dev Resets the queue back to being empty. * * NOTE: The current items are left behind in storage. This does not affect the functioning of the queue, but misses * out on potential gas refunds. */ function clear(Uint256Deque storage deque) internal { deque._begin = 0; deque._end = 0; } /** * @dev Returns the number of items in the queue. */ function length( Uint256Deque storage deque ) internal view returns (uint256) { unchecked { return uint256(deque._end - deque._begin); } } /** * @dev Returns true if the queue is empty. */ function empty(Uint256Deque storage deque) internal view returns (bool) { return deque._end == deque._begin; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; library ERC721Events { event ApprovalForAll( address indexed owner, address indexed operator, bool approved ); event Approval( address indexed owner, address indexed spender, uint256 indexed id ); event Transfer( address indexed from, address indexed to, uint256 indexed id ); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; library ERC20Events { event Approval( address indexed owner, address indexed spender, uint256 value ); event Transfer(address indexed from, address indexed to, uint256 amount); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol) pragma solidity ^0.8.20; /** * @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; } function _contextSuffixLength() internal view virtual returns (uint256) { return 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.20; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be * reverted. * * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/IERC165.sol) pragma solidity ^0.8.20; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
{ "remappings": [ "forge-std/=lib/forge-std/src/", "murky/=lib/murky/src/", "solady/=node_modules/solady/", "@openzeppelin/contracts/=node_modules/@openzeppelin/contracts/", "ds-test/=lib/forge-std/lib/ds-test/src/", "openzeppelin-contracts/=lib/murky/lib/openzeppelin-contracts/" ], "optimizer": { "enabled": true, "runs": 10000 }, "metadata": { "useLiteralContent": false, "bytecodeHash": "none", "appendCBOR": true }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "evmVersion": "paris", "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
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
-----Decoded View---------------
Arg [0] : $owner (address): 0xBabb6638172865996B1480210D8f2D4eD0FE9a52
Arg [1] : $minter (address): 0x54239a172810ba1c65e1f6e647D8546e6B1273B9
Arg [2] : $baseTokenURI (string): ipfs://bafybeibec5u4y3yseifqze3vaybwrkxm7skuz4c3qi3i3gcsl33peszwua/
Arg [3] : $name (string): Palette
Arg [4] : $symbol (string): PLT
Arg [5] : $decimals (uint8): 18
-----Encoded View---------------
14 Constructor Arguments found :
Arg [0] : 000000000000000000000000babb6638172865996b1480210d8f2d4ed0fe9a52
Arg [1] : 00000000000000000000000054239a172810ba1c65e1f6e647d8546e6b1273b9
Arg [2] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000140
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000180
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000012
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000043
Arg [7] : 697066733a2f2f6261667962656962656335753479337973656966717a653376
Arg [8] : 61796277726b786d37736b757a34633371693369336763736c33337065737a77
Arg [9] : 75612f0000000000000000000000000000000000000000000000000000000000
Arg [10] : 0000000000000000000000000000000000000000000000000000000000000007
Arg [11] : 50616c6574746500000000000000000000000000000000000000000000000000
Arg [12] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [13] : 504c540000000000000000000000000000000000000000000000000000000000
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