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Latest 18 from a total of 18 transactions
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Command | 20390029 | 41 days ago | IN | 0 ETH | 0.00044086 | ||||
Command | 20288902 | 55 days ago | IN | 0 ETH | 0.00134962 | ||||
Command | 20270487 | 57 days ago | IN | 0 ETH | 0.00053293 | ||||
Command | 20204023 | 67 days ago | IN | 0.001 ETH | 0.00032328 | ||||
Command | 20183088 | 69 days ago | IN | 0 ETH | 0.00091903 | ||||
Command | 20183083 | 69 days ago | IN | 0 ETH | 0.00080403 | ||||
Command | 20178218 | 70 days ago | IN | 0.00333 ETH | 0.00125631 | ||||
Command | 20178199 | 70 days ago | IN | 0.00333 ETH | 0.0014185 | ||||
Command | 20119801 | 78 days ago | IN | 0.00777 ETH | 0.00127618 | ||||
Command | 20024292 | 92 days ago | IN | 0.001 ETH | 0.00081425 | ||||
Command | 19271385 | 197 days ago | IN | 0 ETH | 0.00599928 | ||||
Command | 19268753 | 197 days ago | IN | 0 ETH | 0.00445912 | ||||
Command | 19268364 | 198 days ago | IN | 0 ETH | 0.00444699 | ||||
Send | 19252805 | 200 days ago | IN | 0.001002 ETH | 0.00121941 | ||||
Command | 19242232 | 201 days ago | IN | 0.001 ETH | 0.00282405 | ||||
Command | 19242122 | 201 days ago | IN | 0.001 ETH | 0.00403443 | ||||
Command | 19241045 | 201 days ago | IN | 0 ETH | 0.005301 | ||||
Command | 19238921 | 202 days ago | IN | 0.01 ETH | 0.00286821 |
Latest 25 internal transactions (View All)
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Parent Transaction Hash | Block | From | To | |||
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20390029 | 41 days ago | 0.01282379 ETH | ||||
20390029 | 41 days ago | 0.01282379 ETH | ||||
20288902 | 55 days ago | 0.00645518 ETH | ||||
20288902 | 55 days ago | 0.00645518 ETH | ||||
20204023 | 67 days ago | 0.001 ETH | ||||
20183088 | 69 days ago | 0.03189631 ETH | ||||
20183088 | 69 days ago | 0.03189631 ETH | ||||
20183083 | 69 days ago | 0.00732854 ETH | ||||
20183083 | 69 days ago | 0.00732854 ETH | ||||
20178218 | 70 days ago | 0.00333 ETH | ||||
20178199 | 70 days ago | 0.00333 ETH | ||||
20119801 | 78 days ago | 0.00777 ETH | ||||
20024292 | 92 days ago | 0.001 ETH | ||||
19268753 | 197 days ago | 0.00340178 ETH | ||||
19268753 | 197 days ago | 0.00340178 ETH | ||||
19268364 | 198 days ago | 0.03695706 ETH | ||||
19268364 | 198 days ago | 0.03695706 ETH | ||||
19252805 | 200 days ago | 0.001002 ETH | ||||
19242232 | 201 days ago | 0.001 ETH | ||||
19242122 | 201 days ago | 0.001 ETH | ||||
19241045 | 201 days ago | 0.00708286 ETH | ||||
19241045 | 201 days ago | 0.00708286 ETH | ||||
19240026 | 202 days ago | 0.001 ETH | ||||
19240026 | 202 days ago | 0.001 ETH | ||||
19238921 | 202 days ago | 0.01 ETH |
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Contract Source Code Verified (Exact Match)
Contract Name:
IE
Compiler Version
v0.8.24+commit.e11b9ed9
Optimization Enabled:
Yes with 9999999 runs
Other Settings:
shanghai EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// ⌘ ⌘ ⌘ ⌘ ⌘ ⌘ ⌘ ⌘ ⌘ ⌘ ⌘ ⌘ ⌘ ⌘ ⌘ ⌘ ⌘ ⌘ ⌘ // SPDX-License-Identifier: AGPL-3.0-only pragma solidity ^0.8.19; import {SafeTransferLib} from "../lib/solady/src/utils/SafeTransferLib.sol"; import {MetadataReaderLib} from "../lib/solady/src/utils/MetadataReaderLib.sol"; /// @title Intents Engine (IE) /// @notice Simple helper contract for turning transactional intents into executable code. /// @dev V1 simulates typical commands (sending and swapping tokens) and includes execution. /// IE also has a workflow to verify the intent of ERC4337 account userOps against calldata. /// @author nani.eth (https://github.com/NaniDAO/ie) /// @custom:version 1.0.0 contract IE { /// ======================= LIBRARY USAGE ======================= /// /// @dev Metadata reader library. using MetadataReaderLib for address; /// @dev Safe token transfer library. using SafeTransferLib for address; /// ======================= CUSTOM ERRORS ======================= /// /// @dev Bad math. error Overflow(); /// @dev Caller fails. error Unauthorized(); /// @dev 0-liquidity. error InvalidSwap(); /// @dev Invalid command. error InvalidSyntax(); /// @dev Non-numeric character. error InvalidCharacter(); /// =========================== EVENTS =========================== /// /// @dev Logs the registration of a token name. event NameSet(address indexed token, string name); /// ========================== STRUCTS ========================== /// /// @dev The ERC4337 user operation (userOp) struct. struct UserOperation { address sender; uint256 nonce; bytes initCode; bytes callData; uint256 callGasLimit; uint256 verificationGasLimit; uint256 preVerificationGas; uint256 maxFeePerGas; uint256 maxPriorityFeePerGas; bytes paymasterAndData; bytes signature; } /// @dev The packed ERC4337 user operation (userOp) struct. struct PackedUserOperation { address sender; uint256 nonce; bytes initCode; bytes callData; bytes32 accountGasLimits; uint256 preVerificationGas; bytes32 gasFees; // `maxPriorityFee` and `maxFeePerGas`. bytes paymasterAndData; bytes signature; } /// =========================== ENUMS =========================== /// /// @dev `ENSAsciiNormalizer` rules. enum Rule { DISALLOWED, VALID } /// ========================= CONSTANTS ========================= /// /// @dev The governing DAO address. address internal constant DAO = 0xDa000000000000d2885F108500803dfBAaB2f2aA; /// @dev The NANI token address. address internal constant NANI = 0x00000000000025824328358250920B271f348690; /// @dev The conventional ERC7528 ETH address. address internal constant ETH = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; /// @dev The canonical wrapped ETH address. address internal constant WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; /// @dev The popular wrapped BTC address. address internal constant WBTC = 0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599; /// @dev The Circle USD stablecoin address. address internal constant USDC = 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48; /// @dev The Tether USD stablecoin address. address internal constant USDT = 0xdAC17F958D2ee523a2206206994597C13D831ec7; /// @dev The Maker DAO USD stablecoin address. address internal constant DAI = 0x6B175474E89094C44Da98b954EedeAC495271d0F; /// @dev ENS fallback registry contract. IENSHelper internal constant ENS_REGISTRY = IENSHelper(0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e); /// @dev ENS name wrapper token contract. IENSHelper internal constant ENS_WRAPPER = IENSHelper(0xD4416b13d2b3a9aBae7AcD5D6C2BbDBE25686401); /// @dev The address of the Uniswap V3 Factory. address internal constant UNISWAP_V3_FACTORY = 0x1F98431c8aD98523631AE4a59f267346ea31F984; /// @dev The Uniswap V3 Pool `initcodehash`. bytes32 internal constant UNISWAP_V3_POOL_INIT_CODE_HASH = 0xe34f199b19b2b4f47f68442619d555527d244f78a3297ea89325f843f87b8b54; /// @dev The minimum value that can be returned from `getSqrtRatioAtTick` (plus one). uint160 internal constant MIN_SQRT_RATIO_PLUS_ONE = 4295128740; /// @dev The maximum value that can be returned from `getSqrtRatioAtTick` (minus one). uint160 internal constant MAX_SQRT_RATIO_MINUS_ONE = 1461446703485210103287273052203988822378723970341; /// @dev String mapping for `ENSAsciiNormalizer` logic. bytes internal constant ASCII_MAP = hex"2d00020101000a010700016101620163016401650166016701680169016a016b016c016d016e016f0170017101720173017401750176017701780179017a06001a010500"; /// ========================== STORAGE ========================== /// /// @dev DAO-governed token address naming. mapping(string name => address) public tokens; /// @dev Each index in idnamap refers to an ascii code point. /// If idnamap[char] > 2, char maps to a valid ascii character. /// Otherwise, idna[char] returns Rule.DISALLOWED or Rule.VALID. /// Modified from `ENSAsciiNormalizer` deployed by royalfork.eth /// (0x4A5cae3EC0b144330cf1a6CeAD187D8F6B891758). bytes1[] internal _idnamap; /// ======================== CONSTRUCTOR ======================== /// /// @dev Constructs this IE with `ASCII_MAP`. constructor() payable { unchecked { for (uint256 i; i != ASCII_MAP.length; i += 2) { bytes1 r = ASCII_MAP[i + 1]; for (uint8 j; j != uint8(ASCII_MAP[i]); ++j) { _idnamap.push(r); } } } } /// ====================== COMMAND PREVIEW ====================== /// /// @notice Preview natural language smart contract command. /// The `send` syntax uses ENS naming: 'send vitalik 20 DAI'. /// `swap` syntax uses common format: 'swap 100 DAI for WETH'. function previewCommand(string calldata intent) public view virtual returns ( address to, // Receiver address. uint256 amount, // Formatted amount. address token, // Asset to send `to`. bytes memory callData, // Raw calldata for send transaction. bytes memory executeCallData // Anticipates common execute API. ) { string memory normalized = _lowercase(intent); bytes32 action = _extraction(normalized); if (action == "send" || action == "transfer") { (string memory _to, string memory _amount, string memory _token) = _extractSend(normalized); (to, amount, token, callData, executeCallData) = previewSend(_to, _amount, _token); } else if (action == "swap" || action == "exchange") { (string memory amountIn, string memory tokenIn, string memory tokenOut) = _extractSwap(normalized); (amount, token, to) = previewSwap(amountIn, tokenIn, tokenOut); } else { revert InvalidSyntax(); // Invalid command format. } } /// @dev Previews a `send` command from the parts of a matched intent string. function previewSend(string memory to, string memory amount, string memory token) public view virtual returns ( address _to, uint256 _amount, address _token, bytes memory callData, bytes memory executeCallData ) { _token = _returnTokenConstant(bytes32(bytes(token))); // Check constant. if (_token == address(0)) _token = tokens[token]; // Check storage. bool isETH = _token == ETH; // Memo whether the token is ETH or not. (, _to,) = whatIsTheAddressOf(to); // Fetch receiver address from ENS. _amount = _stringToUint(amount, isETH ? 18 : _token.readDecimals()); if (!isETH) callData = abi.encodeCall(IToken.transfer, (_to, _amount)); executeCallData = abi.encodeCall(IExecutor.execute, (isETH ? _to : _token, isETH ? _amount : 0, callData)); } /// @dev Previews a `swap` command from the parts of a matched intent string. function previewSwap(string memory amountIn, string memory tokenIn, string memory tokenOut) public view virtual returns (uint256 _amountIn, address _tokenIn, address _tokenOut) { _tokenIn = _returnTokenConstant(bytes32(bytes(tokenIn))); if (_tokenIn == address(0)) _tokenIn = tokens[tokenIn]; _tokenOut = _returnTokenConstant(bytes32(bytes(tokenOut))); if (_tokenOut == address(0)) _tokenOut = tokens[tokenOut]; _amountIn = _stringToUint(amountIn, _tokenIn == ETH ? 18 : _tokenIn.readDecimals()); } /// @dev Checks ERC4337 userOp against the output of the command intent. function checkUserOp(string calldata intent, UserOperation calldata userOp) public view virtual returns (bool) { (,,,, bytes memory executeCallData) = previewCommand(intent); if (executeCallData.length != userOp.callData.length) return false; return keccak256(executeCallData) == keccak256(userOp.callData); } /// @dev Checks packed ERC4337 userOp against the output of the command intent. function checkPackedUserOp(string calldata intent, PackedUserOperation calldata userOp) public view virtual returns (bool) { (,,,, bytes memory executeCallData) = previewCommand(intent); if (executeCallData.length != userOp.callData.length) return false; return keccak256(executeCallData) == keccak256(userOp.callData); } /// @dev Checks and returns the canonical token address constant for a matched intent string. function _returnTokenConstant(bytes32 token) internal view virtual returns (address _token) { if (token == "eth" || token == "ether") return ETH; if (token == "usdc") return USDC; if (token == "usdt") return USDT; if (token == "dai") return DAI; if (token == "nani") return NANI; if (token == "weth") return WETH; if (token == "wbtc" || token == "btc" || token == "bitcoin") return WBTC; } /// ===================== COMMAND EXECUTION ===================== /// /// @dev Executes a text command from an intent string. function command(string calldata intent) public payable virtual { string memory normalized = _lowercase(intent); bytes32 action = _extraction(normalized); if (action == "send" || action == "transfer") { (string memory to, string memory amount, string memory token) = _extractSend(normalized); send(to, amount, token); } else if (action == "swap" || action == "exchange") { (string memory amountIn, string memory tokenIn, string memory tokenOut) = _extractSwap(normalized); swap(amountIn, tokenIn, tokenOut); } else { revert InvalidSyntax(); // Invalid command format. } } /// @dev Executes a `send` command from the parts of a matched intent string. function send(string memory to, string memory amount, string memory token) public payable virtual { address _token = _returnTokenConstant(bytes32(bytes(token))); if (_token == address(0)) _token = tokens[token]; (, address _to,) = whatIsTheAddressOf(to); if (_token == ETH) { _to.safeTransferETH(_stringToUint(amount, 18)); } else { _token.safeTransferFrom(msg.sender, _to, _stringToUint(amount, _token.readDecimals())); } } /// @dev Executes a `swap` command from the parts of a matched intent string. function swap(string memory amountIn, string memory tokenIn, string memory tokenOut) public payable virtual { address _tokenIn = _returnTokenConstant(bytes32(bytes(tokenIn))); if (_tokenIn == address(0)) _tokenIn = tokens[tokenIn]; address _tokenOut = _returnTokenConstant(bytes32(bytes(tokenOut))); if (_tokenOut == address(0)) _tokenOut = tokens[tokenOut]; bool ETHIn = _tokenIn == ETH; bool ETHOut = _tokenOut == ETH; if (ETHIn) _tokenIn = WETH; if (ETHOut) _tokenOut = WETH; uint256 _amountIn = _stringToUint(amountIn, ETHIn ? 18 : _tokenIn.readDecimals()); if (_amountIn >= 1 << 255) revert Overflow(); (address pool, bool zeroForOne) = _computePoolAddress(_tokenIn, _tokenOut); ISwapRouter(pool).swap( !ETHOut ? msg.sender : address(this), zeroForOne, int256(_amountIn), zeroForOne ? MIN_SQRT_RATIO_PLUS_ONE : MAX_SQRT_RATIO_MINUS_ONE, abi.encodePacked(ETHIn, ETHOut, msg.sender, _tokenIn, _tokenOut) ); } /// @dev Fallback `uniswapV3SwapCallback`. /// If ETH is swapped, WETH is forwarded. fallback() external payable virtual { int256 amount0Delta; int256 amount1Delta; bool ETHIn; bool ETHOut; address payer; address tokenIn; address tokenOut; assembly ("memory-safe") { amount0Delta := calldataload(0x4) amount1Delta := calldataload(0x24) ETHIn := byte(0, calldataload(0x84)) ETHOut := byte(0, calldataload(add(0x84, 1))) payer := shr(96, calldataload(add(0x84, 2))) tokenIn := shr(96, calldataload(add(0x84, 22))) tokenOut := shr(96, calldataload(add(0x84, 42))) } if (amount0Delta <= 0 && amount1Delta <= 0) revert InvalidSwap(); (address pool, bool zeroForOne) = _computePoolAddress(tokenIn, tokenOut); if (msg.sender != pool) revert Unauthorized(); // Only pair pool can call. if (ETHIn) { _wrapETH(uint256(zeroForOne ? amount0Delta : amount1Delta)); } else { tokenIn.safeTransferFrom( payer, msg.sender, uint256(zeroForOne ? amount0Delta : amount1Delta) ); } if (ETHOut) { uint256 amount = uint256(-(zeroForOne ? amount1Delta : amount0Delta)); _unwrapETH(amount); payer.safeTransferETH(amount); } } /// @dev Computes the create2 address for given token pair. function _computePoolAddress(address tokenA, address tokenB) internal view virtual returns (address pool, bool zeroForOne) { if (tokenA < tokenB) zeroForOne = true; else (tokenA, tokenB) = (tokenB, tokenA); pool = _computePairHash(tokenA, tokenB, 3000); // Mid fee. if (pool.code.length != 0) return (pool, zeroForOne); else pool = _computePairHash(tokenA, tokenB, 500); // Low fee. if (pool.code.length != 0) return (pool, zeroForOne); else pool = _computePairHash(tokenA, tokenB, 100); // Lowest fee. if (pool.code.length != 0) return (pool, zeroForOne); else pool = _computePairHash(tokenA, tokenB, 10000); // Highest fee. if (pool.code.length != 0) return (pool, zeroForOne); } /// @dev Computes the create2 deployment hash for given token pair. function _computePairHash(address token0, address token1, uint24 fee) internal pure virtual returns (address pool) { bytes32 salt = keccak256(abi.encode(token0, token1, fee)); assembly ("memory-safe") { mstore8(0x00, 0xff) // Write the prefix. mstore(0x35, UNISWAP_V3_POOL_INIT_CODE_HASH) mstore(0x01, shl(96, UNISWAP_V3_FACTORY)) mstore(0x15, salt) pool := keccak256(0x00, 0x55) mstore(0x35, 0) // Restore overwritten. } } /// @dev Wraps an `amount` of ETH to WETH and funds pool caller for swap. function _wrapETH(uint256 amount) internal virtual { assembly ("memory-safe") { pop(call(gas(), WETH, amount, codesize(), 0x00, codesize(), 0x00)) mstore(0x14, caller()) // Store the `pool` argument. mstore(0x34, amount) // Store the `amount` argument. mstore(0x00, 0xa9059cbb000000000000000000000000) // `transfer(address,uint256)`. pop(call(gas(), WETH, 0, 0x10, 0x44, codesize(), 0x00)) mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten. } } /// @dev Unwraps an `amount` of ETH from WETH for return. function _unwrapETH(uint256 amount) internal virtual { assembly ("memory-safe") { mstore(0x00, 0x2e1a7d4d) // `withdraw(uint256)`. mstore(0x20, amount) // Store the `amount` argument. pop(call(gas(), WETH, 0, 0x1c, 0x24, codesize(), 0x00)) } } /// @dev ETH receiver fallback. receive() external payable virtual { if (msg.sender != WETH) revert Unauthorized(); } /// ================== BALANCE & SUPPLY HELPERS ================== /// /// @dev Returns the balance of a named account in a named token. function whatIsTheBalanceOf(string calldata name, /*(bob)*/ /*in*/ string calldata token) public view virtual returns (uint256 balance, uint256 balanceAdjusted) { (, address _name,) = whatIsTheAddressOf(name); string memory normalized = _lowercase(token); address _token = _returnTokenConstant(bytes32(bytes(normalized))); if (_token == address(0)) _token = tokens[token]; bool isETH = _token == ETH; balance = isETH ? _name.balance : _token.balanceOf(_name); balanceAdjusted = balance / 10 ** (isETH ? 18 : _token.readDecimals()); } /// @dev Returns the total supply of a named token. function whatIsTheTotalSupplyOf(string calldata token) public view virtual returns (uint256 supply, uint256 supplyAdjusted) { address _token = _returnTokenConstant(bytes32(bytes(token))); if (_token == address(0)) _token = tokens[token]; if (_token == ETH) revert InvalidSyntax(); assembly ("memory-safe") { mstore(0x00, 0x18160ddd) // `totalSupply()`. if iszero(staticcall(gas(), _token, 0x1c, 0x04, 0x20, 0x20)) { revert(codesize(), 0x00) } supply := mload(0x20) } supplyAdjusted = supply / 10 ** _token.readDecimals(); } /// ====================== ENS VERIFICATION ====================== /// /// @dev Returns ENS name ownership details. function whatIsTheAddressOf(string memory name) public view virtual returns (address owner, address receiver, bytes32 node) { node = _namehash(string(abi.encodePacked(name, ".eth"))); owner = ENS_REGISTRY.owner(node); if (IENSHelper(owner) == ENS_WRAPPER) owner = ENS_WRAPPER.ownerOf(uint256(node)); receiver = IENSHelper(ENS_REGISTRY.resolver(node)).addr(node); // Fails on misname. } /// @dev Computes an ENS domain namehash. function _namehash(string memory domain) internal view virtual returns (bytes32 node) { // Process labels (in reverse order for namehash). uint256 i = bytes(domain).length; uint256 lastDot = i; unchecked { for (; i != 0; --i) { bytes1 c = bytes(domain)[i - 1]; if (c == ".") { node = keccak256(abi.encodePacked(node, _labelhash(domain, i, lastDot))); lastDot = i - 1; continue; } require(c < 0x80); bytes1 r = _idnamap[uint8(c)]; require(uint8(r) != uint8(Rule.DISALLOWED)); if (uint8(r) > 1) { bytes(domain)[i - 1] = r; } } } return keccak256(abi.encodePacked(node, _labelhash(domain, i, lastDot))); } /// @dev Computes an ENS domain labelhash given its start and end. function _labelhash(string memory domain, uint256 start, uint256 end) internal pure virtual returns (bytes32 hash) { assembly ("memory-safe") { hash := keccak256(add(add(domain, 0x20), start), sub(end, start)) } } /// ========================= GOVERNANCE ========================= /// /// @dev Sets a public `name` tag for a given `token` address. Governed by DAO. function setName(address token, string calldata name) public payable virtual { if (msg.sender != DAO) revert Unauthorized(); string memory normalized = _lowercase(name); emit NameSet(tokens[normalized] = token, normalized); } /// @dev Sets a public name and ticker for a given `token` address. function setNameAndTicker(address token) public payable virtual { string memory normalizedName = _lowercase(token.readName()); string memory normalizedSymbol = _lowercase(token.readSymbol()); emit NameSet(tokens[normalizedName] = token, normalizedName); emit NameSet(tokens[normalizedSymbol] = token, normalizedSymbol); } /// ===================== STRING OPERATIONS ===================== /// /// @dev Returns copy of string in lowercase. /// Modified from Solady LibString `toCase`. function _lowercase(string memory subject) internal pure virtual returns (string memory result) { assembly ("memory-safe") { let length := mload(subject) if length { result := add(mload(0x40), 0x20) subject := add(subject, 1) let flags := shl(add(70, shl(5, 0)), 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 Extracts the first word (action) as bytes32. function _extraction(string memory normalizedIntent) internal pure virtual returns (bytes32 result) { assembly ("memory-safe") { let str := add(normalizedIntent, 0x20) for { let i } lt(i, 0x20) { i := add(i, 1) } { let char := byte(0, mload(add(str, i))) if eq(char, 0x20) { break } result := or(result, shl(sub(248, mul(i, 8)), char)) } } } /// @dev Extract the key words of normalized `send` intent. function _extractSend(string memory normalizedIntent) internal pure virtual returns (string memory to, string memory amount, string memory token) { string[] memory parts = _split(normalizedIntent, " "); if (parts.length == 4) return (parts[1], parts[2], parts[3]); if (parts.length == 5) return (parts[4], parts[1], parts[2]); else revert InvalidSyntax(); // Command is not formatted. } /// @dev Extract the key words of normalized `swap` intent. function _extractSwap(string memory normalizedIntent) internal pure virtual returns (string memory amountIn, string memory tokenIn, string memory tokenOut) { string[] memory parts = _split(normalizedIntent, " "); if (parts.length == 5) return (parts[1], parts[2], parts[4]); else revert InvalidSyntax(); // Command is not formatted. } /// @dev Split the intent into an array of words. function _split(string memory base, bytes1 delimiter) internal pure virtual returns (string[] memory parts) { unchecked { bytes memory baseBytes = bytes(base); uint256 count = 1; for (uint256 i; i != baseBytes.length; ++i) { if (baseBytes[i] == delimiter) { ++count; } } parts = new string[](count); uint256 partIndex; uint256 start; for (uint256 i; i <= baseBytes.length; ++i) { if (i == baseBytes.length || baseBytes[i] == delimiter) { bytes memory part = new bytes(i - start); for (uint256 j = start; j != i; ++j) { part[j - start] = baseBytes[j]; } parts[partIndex] = string(part); ++partIndex; start = i + 1; } } } } /// @dev Convert string to decimalized numerical value. function _stringToUint(string memory s, uint8 decimals) internal pure virtual returns (uint256 result) { unchecked { bool hasDecimal; uint256 decimalPlaces; bytes memory b = bytes(s); for (uint256 i; i != b.length; ++i) { if (b[i] >= "0" && b[i] <= "9") { result = result * 10 + uint8(b[i]) - 48; if (hasDecimal) { ++decimalPlaces; if (decimalPlaces > decimals) { break; } } } else if (b[i] == "." && !hasDecimal) { hasDecimal = true; } else { revert InvalidCharacter(); } } if (decimalPlaces < decimals) { result *= 10 ** (decimals - decimalPlaces); } } } } /// @dev ENS name resolution helper contracts interface. interface IENSHelper { function addr(bytes32) external view returns (address); function owner(bytes32) external view returns (address); function ownerOf(uint256) external view returns (address); function resolver(bytes32) external view returns (address); } /// @dev Simple token transfer interface. interface IToken { function transfer(address, uint256) external returns (bool); } /// @notice Simple calldata executor interface. interface IExecutor { function execute(address, uint256, bytes calldata) external payable returns (bytes memory); } /// @dev Simple Uniswap V3 swapping interface. interface ISwapRouter { function swap(address, bool, int256, uint160, bytes calldata) external returns (int256, int256); }
// 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 reading contract metadata robustly. /// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/MetadataReaderLib.sol) library MetadataReaderLib { /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* CONSTANTS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Default gas stipend for contract reads. High enough for most practical use cases /// (able to SLOAD about 1000 bytes of data), but low enough to prevent griefing. uint256 internal constant GAS_STIPEND_NO_GRIEF = 100000; /// @dev Default string byte length limit. uint256 internal constant STRING_LIMIT_DEFAULT = 1000; /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* METADATA READING OPERATIONS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ // Best-effort string reading operations. // Should NOT revert as long as sufficient gas is provided. // // Performs the following in order: // 1. Returns the empty string for the following cases: // - Reverts. // - No returndata (e.g. function returns nothing, EOA). // - Returns empty string. // 2. Attempts to `abi.decode` the returndata into a string. // 3. With any remaining gas, scans the returndata from start to end for the // null byte '\0', to interpret the returndata as a null-terminated string. /// @dev Equivalent to `readString(abi.encodeWithSignature("name()"))`. function readName(address target) internal view returns (string memory) { return _string(target, _ptr(0x06fdde03), STRING_LIMIT_DEFAULT, GAS_STIPEND_NO_GRIEF); } /// @dev Equivalent to `readString(abi.encodeWithSignature("name()"), limit)`. function readName(address target, uint256 limit) internal view returns (string memory) { return _string(target, _ptr(0x06fdde03), limit, GAS_STIPEND_NO_GRIEF); } /// @dev Equivalent to `readString(abi.encodeWithSignature("name()"), limit, gasStipend)`. function readName(address target, uint256 limit, uint256 gasStipend) internal view returns (string memory) { return _string(target, _ptr(0x06fdde03), limit, gasStipend); } /// @dev Equivalent to `readString(abi.encodeWithSignature("symbol()"))`. function readSymbol(address target) internal view returns (string memory) { return _string(target, _ptr(0x95d89b41), STRING_LIMIT_DEFAULT, GAS_STIPEND_NO_GRIEF); } /// @dev Equivalent to `readString(abi.encodeWithSignature("symbol()"), limit)`. function readSymbol(address target, uint256 limit) internal view returns (string memory) { return _string(target, _ptr(0x95d89b41), limit, GAS_STIPEND_NO_GRIEF); } /// @dev Equivalent to `readString(abi.encodeWithSignature("symbol()"), limit, gasStipend)`. function readSymbol(address target, uint256 limit, uint256 gasStipend) internal view returns (string memory) { return _string(target, _ptr(0x95d89b41), limit, gasStipend); } /// @dev Performs a best-effort string query on `target` with `data` as the calldata. /// The string will be truncated to `STRING_LIMIT_DEFAULT` (1000) bytes. function readString(address target, bytes memory data) internal view returns (string memory) { return _string(target, _ptr(data), STRING_LIMIT_DEFAULT, GAS_STIPEND_NO_GRIEF); } /// @dev Performs a best-effort string query on `target` with `data` as the calldata. /// The string will be truncated to `limit` bytes. function readString(address target, bytes memory data, uint256 limit) internal view returns (string memory) { return _string(target, _ptr(data), limit, GAS_STIPEND_NO_GRIEF); } /// @dev Performs a best-effort string query on `target` with `data` as the calldata. /// The string will be truncated to `limit` bytes. function readString(address target, bytes memory data, uint256 limit, uint256 gasStipend) internal view returns (string memory) { return _string(target, _ptr(data), limit, gasStipend); } // Best-effort unsigned integer reading operations. // Should NOT revert as long as sufficient gas is provided. // // Performs the following in order: // 1. Attempts to `abi.decode` the result into a uint256 // (equivalent across all Solidity uint types, downcast as needed). // 2. Returns zero for the following cases: // - Reverts. // - No returndata (e.g. function returns nothing, EOA). // - Returns zero. // - `abi.decode` failure. /// @dev Equivalent to `uint8(readUint(abi.encodeWithSignature("decimal()")))`. function readDecimals(address target) internal view returns (uint8) { return uint8(_uint(target, _ptr(0x313ce567), GAS_STIPEND_NO_GRIEF)); } /// @dev Equivalent to `uint8(readUint(abi.encodeWithSignature("decimal()"), gasStipend))`. function readDecimals(address target, uint256 gasStipend) internal view returns (uint8) { return uint8(_uint(target, _ptr(0x313ce567), gasStipend)); } /// @dev Performs a best-effort uint query on `target` with `data` as the calldata. function readUint(address target, bytes memory data) internal view returns (uint256) { return _uint(target, _ptr(data), GAS_STIPEND_NO_GRIEF); } /// @dev Performs a best-effort uint query on `target` with `data` as the calldata. function readUint(address target, bytes memory data, uint256 gasStipend) internal view returns (uint256) { return _uint(target, _ptr(data), gasStipend); } /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* PRIVATE HELPERS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Attempts to read and return a string at `target`. function _string(address target, bytes32 ptr, uint256 limit, uint256 gasStipend) private view returns (string memory result) { /// @solidity memory-safe-assembly assembly { function min(x_, y_) -> _z { _z := xor(x_, mul(xor(x_, y_), lt(y_, x_))) } for {} staticcall(gasStipend, target, add(ptr, 0x20), mload(ptr), 0x00, 0x20) {} { let m := mload(0x40) // Grab the free memory pointer. let s := add(0x20, m) // Start of the string's bytes in memory. // Attempt to `abi.decode` if the returndatasize is greater or equal to 64. if iszero(lt(returndatasize(), 0x40)) { let o := mload(0x00) // Load the string's offset in the returndata. // If the string's offset is within bounds. if iszero(gt(o, sub(returndatasize(), 0x20))) { returndatacopy(m, o, 0x20) // Copy the string's length. // If the full string's end is within bounds. // Note: If the full string doesn't fit, the `abi.decode` must be aborted // for compliance purposes, regardless if the truncated string can fit. if iszero(gt(mload(m), sub(returndatasize(), add(o, 0x20)))) { let n := min(mload(m), limit) // Truncate if needed. mstore(m, n) // Overwrite the length. returndatacopy(s, add(o, 0x20), n) // Copy the string's bytes. mstore(add(s, n), 0) // Zeroize the slot after the string. mstore(0x40, add(0x20, add(s, n))) // Allocate memory for the string. result := m break } } } // Try interpreting as a null-terminated string. let n := min(returndatasize(), limit) // Truncate if needed. returndatacopy(s, 0, n) // Copy the string's bytes. mstore8(add(s, n), 0) // Place a '\0' at the end. let i := s // Pointer to the next byte to scan. for {} byte(0, mload(i)) { i := add(i, 1) } {} // Scan for '\0'. mstore(m, sub(i, s)) // Store the string's length. mstore(i, 0) // Zeroize the slot after the string. mstore(0x40, add(0x20, i)) // Allocate memory for the string. result := m break } } } /// @dev Attempts to read and return a uint at `target`. function _uint(address target, bytes32 ptr, uint256 gasStipend) private view returns (uint256 result) { /// @solidity memory-safe-assembly assembly { result := mul( mload(0x20), and( // The arguments of `and` are evaluated from right to left. gt(returndatasize(), 0x1f), // At least 32 bytes returned. staticcall(gasStipend, target, add(ptr, 0x20), mload(ptr), 0x20, 0x20) ) ) } } /// @dev Casts the function selector `s` into a pointer. function _ptr(uint256 s) private pure returns (bytes32 result) { /// @solidity memory-safe-assembly assembly { // Layout the calldata in the scratch space for temporary usage. mstore(0x04, s) // Store the function selector. mstore(result, 4) // Store the length. } } /// @dev Casts the `data` into a pointer. function _ptr(bytes memory data) private pure returns (bytes32 result) { /// @solidity memory-safe-assembly assembly { result := data } } }
{ "remappings": [ "ds-test/=lib/forge-std/lib/ds-test/src/", "forge-std/=lib/forge-std/src/", "solady/=lib/solady/src/" ], "optimizer": { "enabled": true, "runs": 9999999 }, "metadata": { "useLiteralContent": false, "bytecodeHash": "ipfs", "appendCBOR": true }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "evmVersion": "shanghai", "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[],"stateMutability":"payable","type":"constructor"},{"inputs":[],"name":"InvalidCharacter","type":"error"},{"inputs":[],"name":"InvalidSwap","type":"error"},{"inputs":[],"name":"InvalidSyntax","type":"error"},{"inputs":[],"name":"Overflow","type":"error"},{"inputs":[],"name":"Unauthorized","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"string","name":"name","type":"string"}],"name":"NameSet","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[{"internalType":"string","name":"intent","type":"string"},{"components":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"bytes","name":"initCode","type":"bytes"},{"internalType":"bytes","name":"callData","type":"bytes"},{"internalType":"bytes32","name":"accountGasLimits","type":"bytes32"},{"internalType":"uint256","name":"preVerificationGas","type":"uint256"},{"internalType":"bytes32","name":"gasFees","type":"bytes32"},{"internalType":"bytes","name":"paymasterAndData","type":"bytes"},{"internalType":"bytes","name":"signature","type":"bytes"}],"internalType":"struct IE.PackedUserOperation","name":"userOp","type":"tuple"}],"name":"checkPackedUserOp","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"intent","type":"string"},{"components":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"bytes","name":"initCode","type":"bytes"},{"internalType":"bytes","name":"callData","type":"bytes"},{"internalType":"uint256","name":"callGasLimit","type":"uint256"},{"internalType":"uint256","name":"verificationGasLimit","type":"uint256"},{"internalType":"uint256","name":"preVerificationGas","type":"uint256"},{"internalType":"uint256","name":"maxFeePerGas","type":"uint256"},{"internalType":"uint256","name":"maxPriorityFeePerGas","type":"uint256"},{"internalType":"bytes","name":"paymasterAndData","type":"bytes"},{"internalType":"bytes","name":"signature","type":"bytes"}],"internalType":"struct IE.UserOperation","name":"userOp","type":"tuple"}],"name":"checkUserOp","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"intent","type":"string"}],"name":"command","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"string","name":"intent","type":"string"}],"name":"previewCommand","outputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"token","type":"address"},{"internalType":"bytes","name":"callData","type":"bytes"},{"internalType":"bytes","name":"executeCallData","type":"bytes"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"to","type":"string"},{"internalType":"string","name":"amount","type":"string"},{"internalType":"string","name":"token","type":"string"}],"name":"previewSend","outputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"address","name":"_token","type":"address"},{"internalType":"bytes","name":"callData","type":"bytes"},{"internalType":"bytes","name":"executeCallData","type":"bytes"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"amountIn","type":"string"},{"internalType":"string","name":"tokenIn","type":"string"},{"internalType":"string","name":"tokenOut","type":"string"}],"name":"previewSwap","outputs":[{"internalType":"uint256","name":"_amountIn","type":"uint256"},{"internalType":"address","name":"_tokenIn","type":"address"},{"internalType":"address","name":"_tokenOut","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"to","type":"string"},{"internalType":"string","name":"amount","type":"string"},{"internalType":"string","name":"token","type":"string"}],"name":"send","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"string","name":"name","type":"string"}],"name":"setName","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"setNameAndTicker","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"string","name":"amountIn","type":"string"},{"internalType":"string","name":"tokenIn","type":"string"},{"internalType":"string","name":"tokenOut","type":"string"}],"name":"swap","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"string","name":"name","type":"string"}],"name":"tokens","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"name","type":"string"}],"name":"whatIsTheAddressOf","outputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"receiver","type":"address"},{"internalType":"bytes32","name":"node","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"token","type":"string"}],"name":"whatIsTheBalanceOf","outputs":[{"internalType":"uint256","name":"balance","type":"uint256"},{"internalType":"uint256","name":"balanceAdjusted","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"token","type":"string"}],"name":"whatIsTheTotalSupplyOf","outputs":[{"internalType":"uint256","name":"supply","type":"uint256"},{"internalType":"uint256","name":"supplyAdjusted","type":"uint256"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]
Contract Creation Code
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Multichain Portfolio | 26 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.