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| Balance Of | 1613163 | 1 min ago | 0 ETH | ||||
| Transfer | 1613163 | 1 min ago | 0 ETH | ||||
| Withdraw | 1613163 | 1 min ago | 0 ETH | ||||
| Balance Of | 1613163 | 1 min ago | 0 ETH | ||||
| Batch Transfer | 1613163 | 1 min ago | 0 ETH | ||||
| Balance Of | 1613163 | 1 min ago | 0 ETH | ||||
| Batch Transfer | 1613163 | 1 min ago | 0 ETH | ||||
| Transfer From | 1613163 | 1 min ago | 0 ETH | ||||
| Deposit | 1613163 | 1 min ago | 0 ETH | ||||
| Balance Of | 1613163 | 1 min ago | 0 ETH | ||||
| Balance Of | 1613163 | 1 min ago | 0 ETH | ||||
| Balance Of | 1613163 | 1 min ago | 0 ETH | ||||
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| Balance Of | 1613163 | 1 min ago | 0 ETH | ||||
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| Balance Of | 1613163 | 1 min ago | 0 ETH | ||||
| Balance Of | 1613163 | 1 min ago | 0 ETH | ||||
| Balance Of | 1613163 | 1 min ago | 0 ETH | ||||
| Balance Of | 1613163 | 1 min ago | 0 ETH | ||||
| Balance Of | 1613163 | 1 min ago | 0 ETH | ||||
| Balance Of | 1613163 | 1 min ago | 0 ETH | ||||
| Transfer | 1613163 | 1 min ago | 0 ETH | ||||
| Withdraw | 1613163 | 1 min ago | 0 ETH | ||||
| Balance Of | 1613163 | 1 min ago | 0 ETH |
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Contract Source Code Verified (Exact Match)
Contract Name:
SplitsWarehouse
Compiler Version
v0.8.23+commit.f704f362
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.23;
import { Cast } from "./libraries/Cast.sol";
import { ERC6909X } from "./tokens/ERC6909X.sol";
import { IERC20Metadata as IERC20 } from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { Address } from "@openzeppelin/contracts/utils/Address.sol";
import { ShortString, ShortStrings } from "@openzeppelin/contracts/utils/ShortStrings.sol";
/**
* @title Splits Token Warehouse
* @author Splits
* @notice ERC6909 compliant token warehouse for Splits ecosystem
* @dev Token id here is address(uint160(uint256 id)).
*/
contract SplitsWarehouse is ERC6909X {
using Cast for uint256;
using Cast for address;
using SafeERC20 for IERC20;
using Address for address payable;
using ShortStrings for string;
using ShortStrings for ShortString;
/* -------------------------------------------------------------------------- */
/* ERRORS */
/* -------------------------------------------------------------------------- */
error InvalidAmount();
error LengthMismatch();
error ZeroOwner();
error WithdrawalPaused(address owner);
/* -------------------------------------------------------------------------- */
/* EVENTS */
/* -------------------------------------------------------------------------- */
event WithdrawConfigUpdated(address indexed owner, WithdrawConfig config);
event Withdraw(
address indexed owner, address indexed token, address indexed withdrawer, uint256 amount, uint256 reward
);
/* -------------------------------------------------------------------------- */
/* STRUCTS */
/* -------------------------------------------------------------------------- */
/**
* @notice Withdraw config for a user.
* @param incentive The incentive for withdrawing tokens.
* @param paused The paused state of the withdrawal.
*/
struct WithdrawConfig {
uint16 incentive;
bool paused;
}
/* -------------------------------------------------------------------------- */
/* CONSTANTS/IMMUTABLES */
/* -------------------------------------------------------------------------- */
/// @notice prefix for metadata name.
string private constant METADATA_PREFIX_NAME = "Splits Wrapped ";
/// @notice prefix for metadata symbol.
string private constant METADATA_PREFIX_SYMBOL = "splits";
/// @notice address of the native token, inline with ERC 7528.
address public constant NATIVE_TOKEN = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
/// @notice uint256 representation of the native token.
uint256 public constant NATIVE_TOKEN_ID = uint256(uint160(NATIVE_TOKEN));
/// @notice metadata name of the native token.
ShortString private immutable NATIVE_TOKEN_NAME;
/// @notice metadata symbol of the native token.
ShortString private immutable NATIVE_TOKEN_SYMBOL;
/// @notice Scale for any numbers representing percentages.
/// @dev Used for the token withdrawing incentive.
uint256 public constant PERCENTAGE_SCALE = 1e6;
/* -------------------------------------------------------------------------- */
/* STORAGE */
/* -------------------------------------------------------------------------- */
/// @notice Withdraw config of a user.
mapping(address owner => WithdrawConfig config) public withdrawConfig;
/* -------------------------------------------------------------------------- */
/* CONSTRUCTOR */
/* -------------------------------------------------------------------------- */
/**
* @notice Constructs the SplitsWarehouse contract.
* @param _native_token_name The name of the native token.
* @param _native_token_symbol The symbol of the native token.
*/
constructor(
string memory _native_token_name,
string memory _native_token_symbol
)
ERC6909X("SplitsWarehouse", "v1")
{
NATIVE_TOKEN_NAME = _native_token_name.toShortString();
NATIVE_TOKEN_SYMBOL = _native_token_symbol.toShortString();
}
/* -------------------------------------------------------------------------- */
/* ERC6909METADATA */
/* -------------------------------------------------------------------------- */
/**
* @notice Name of a given token.
* @param id The id of the token.
* @return The name of the token.
*/
function name(uint256 id) external view returns (string memory) {
if (id == NATIVE_TOKEN_ID) {
return NATIVE_TOKEN_NAME.toString();
}
return string.concat(METADATA_PREFIX_NAME, IERC20(id.toAddress()).name());
}
/**
* @notice Symbol of a given token.
* @param id The id of the token.
* @return The symbol of the token.
*/
function symbol(uint256 id) external view returns (string memory) {
if (id == NATIVE_TOKEN_ID) {
return NATIVE_TOKEN_SYMBOL.toString();
}
return string.concat(METADATA_PREFIX_SYMBOL, IERC20(id.toAddress()).symbol());
}
/**
* @notice Decimals of a given token.
* @param id The id of the token.
* @return The decimals of the token.
*/
function decimals(uint256 id) external view returns (uint8) {
if (id == NATIVE_TOKEN_ID) {
return 18;
}
return IERC20(id.toAddress()).decimals();
}
/* -------------------------------------------------------------------------- */
/* PUBLIC/EXTERNAL FUNCTIONS */
/* -------------------------------------------------------------------------- */
/**
* @notice Deposits token to the warehouse for a specified address.
* @dev If the token is native, the amount should be sent as value.
* @param _receiver The address that will receive the wrapped tokens.
* @param _token The address of the token to be deposited.
* @param _amount The amount of the token to be deposited.
*/
function deposit(address _receiver, address _token, uint256 _amount) external payable {
if (_token == NATIVE_TOKEN) {
if (_amount != msg.value) revert InvalidAmount();
} else {
IERC20(_token).safeTransferFrom({ from: msg.sender, to: address(this), value: _amount });
}
_mint({ _receiver: _receiver, _id: _token.toUint256(), _amount: _amount });
}
/**
* @notice Batch deposits token to the warehouse for the specified addresses from msg.sender.
* @dev If the token is native, the amount should be sent as value.
* @param _token The address of the token to be deposited.
* @param _receivers The addresses that will receive the wrapped tokens.
* @param _amounts The amounts of the token to be deposited.
*/
function batchDeposit(
address[] calldata _receivers,
address _token,
uint256[] calldata _amounts
)
external
payable
{
if (_receivers.length != _amounts.length) revert LengthMismatch();
uint256 sum;
uint256 amount;
uint256 tokenId = _token.toUint256();
uint256 length = _receivers.length;
for (uint256 i; i < length; ++i) {
amount = _amounts[i];
sum += amount;
_mint({ _receiver: _receivers[i], _id: tokenId, _amount: amount });
}
if (_token == NATIVE_TOKEN) {
if (sum != msg.value) revert InvalidAmount();
} else {
IERC20(_token).safeTransferFrom({ from: msg.sender, to: address(this), value: sum });
}
}
/**
* @notice Withdraws token from the warehouse for _owner.
* @dev Bypasses withdrawal incentives.
* @param _owner The address whose tokens are withdrawn.
* @param _token The address of the token to be withdrawn.
*/
function withdraw(address _owner, address _token) external {
if (msg.sender != _owner && tx.origin != _owner) {
if (withdrawConfig[_owner].paused) {
revert WithdrawalPaused(_owner);
}
}
// leave 1 to save gas.
uint256 amount = balanceOf[_owner][_token.toUint256()] - 1;
_withdraw({ _owner: _owner, _token: _token, _amount: amount, _withdrawer: msg.sender, _reward: 0 });
}
/**
* @notice Withdraws tokens from the warehouse for a specified address.
* @dev It is recommended to withdraw balance - 1 to save gas.
* @param _owner The address whose tokens are withdrawn.
* @param _tokens The addresses of the tokens to be withdrawn.
* @param _amounts The amounts of the tokens to be withdrawn.
* @param _withdrawer The address that will receive the withdrawer incentive.
*/
function withdraw(
address _owner,
address[] calldata _tokens,
uint256[] calldata _amounts,
address _withdrawer
)
external
{
if (_tokens.length != _amounts.length) revert LengthMismatch();
WithdrawConfig memory config = withdrawConfig[_owner];
if (config.paused) revert WithdrawalPaused(_owner);
uint256 reward;
uint256 length = _tokens.length;
for (uint256 i; i < length; ++i) {
reward = _amounts[i] * config.incentive / PERCENTAGE_SCALE;
_withdraw({
_owner: _owner,
_token: _tokens[i],
_amount: _amounts[i],
_withdrawer: _withdrawer,
_reward: reward
});
}
}
/**
* @notice Batch transfers tokens to the specified addresses from msg.sender.
* @param _token The address of the token to be transferred.
* @param _receivers The addresses of the receivers.
* @param _amounts The amounts of the tokens to be transferred.
*/
function batchTransfer(address[] calldata _receivers, address _token, uint256[] calldata _amounts) external {
if (_receivers.length != _amounts.length) revert LengthMismatch();
uint256 sum;
uint256 amount;
address receiver;
uint256 tokenId = _token.toUint256();
uint256 length = _receivers.length;
for (uint256 i; i < length; ++i) {
receiver = _receivers[i];
amount = _amounts[i];
balanceOf[receiver][tokenId] += amount;
emit Transfer({ caller: msg.sender, sender: msg.sender, receiver: receiver, id: tokenId, amount: amount });
sum += amount;
}
balanceOf[msg.sender][tokenId] -= sum;
}
/**
* @notice Sets the withdraw config for the msg.sender.
* @param _config Includes the incentives for withdrawal and their paused state.
*/
function setWithdrawConfig(WithdrawConfig calldata _config) external {
withdrawConfig[msg.sender] = _config;
emit WithdrawConfigUpdated({ owner: msg.sender, config: _config });
}
/* -------------------------------------------------------------------------- */
/* INTERNAL/PRIVATE */
/* -------------------------------------------------------------------------- */
function _withdraw(
address _owner,
address _token,
uint256 _amount,
address _withdrawer,
uint256 _reward
)
internal
{
_burn({ _sender: _owner, _id: _token.toUint256(), _amount: _amount });
uint256 amountToOwner = _amount - _reward;
if (_token == NATIVE_TOKEN) {
payable(_owner).sendValue(amountToOwner);
if (_reward != 0) payable(_withdrawer).sendValue(_reward);
} else {
IERC20(_token).safeTransfer({ to: _owner, value: amountToOwner });
if (_reward != 0) IERC20(_token).safeTransfer({ to: _withdrawer, value: _reward });
}
// solhint-disable-next-line
emit Withdraw({ owner: _owner, token: _token, withdrawer: _withdrawer, amount: amountToOwner, reward: _reward });
}
}// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.23;
library Cast {
error Overflow();
function toAddress(uint256 _value) internal pure returns (address) {
return address(toUint160(_value));
}
function toUint256(address _value) internal pure returns (uint256) {
return uint256(uint160(_value));
}
function toUint160(uint256 _x) internal pure returns (uint160 y) {
if (_x >> 160 != 0) revert Overflow();
// solhint-disable-next-line no-inline-assembly
assembly {
y := _x
}
}
}// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.23;
import { IERC6909X } from "../interfaces/IERC6909X.sol";
import { IERC6909XCallback } from "../interfaces/IERC6909XCallback.sol";
import { UnorderedNonces } from "../utils/UnorderedNonces.sol";
import { ERC6909 } from "./ERC6909.sol";
import { EIP712 } from "@openzeppelin/contracts/utils/cryptography/EIP712.sol";
import { SignatureChecker } from "@openzeppelin/contracts/utils/cryptography/SignatureChecker.sol";
/**
* @author forked from https://github.com/frangio/erc6909-extensions
* @dev Implementation of the ERC-6909 Permit extension allowing approvals to spenders and operators to be made via
* signatures.
*/
contract ERC6909X is ERC6909, EIP712, UnorderedNonces, IERC6909X {
/* -------------------------------------------------------------------------- */
/* CONSTANTS/IMMUTABLES */
/* -------------------------------------------------------------------------- */
/// @notice The EIP-712 typehash for approveAndCall
bytes32 public constant APPROVE_AND_CALL_TYPE_HASH = keccak256(
// solhint-disable-next-line max-line-length
"ERC6909XApproveAndCall(bool temporary,address owner,address spender,bool operator,uint256 id,uint256 amount,address target,bytes data,uint256 nonce,uint48 deadline)"
);
/* -------------------------------------------------------------------------- */
/* ERRORS */
/* -------------------------------------------------------------------------- */
error ExpiredSignature(uint48 deadline);
error InvalidSigner();
error InvalidPermitParams();
error InvalidAck();
/* -------------------------------------------------------------------------- */
/* CONSTRUCTOR */
/* -------------------------------------------------------------------------- */
/**
* @dev Initializes the {EIP712} domain separator.
*
*/
constructor(string memory _name, string memory _version) EIP712(_name, _version) { }
/* -------------------------------------------------------------------------- */
/* PUBLIC FUNCTIONS */
/* -------------------------------------------------------------------------- */
/**
* @notice Returns true if `interfaceId` is supported.
* @dev Supports ERC6909X, ERC165, and ERC6909.
* @param _interfaceId The interface identifier, as specified in ERC-165.
*/
function supportsInterface(bytes4 _interfaceId) public view override returns (bool supported) {
return super.supportsInterface({ _interfaceId: _interfaceId }) || _interfaceId == type(IERC6909X).interfaceId;
}
/**
* @notice Temporary grants spender allowance or operator status and forwards the data to the target contract.
* @dev The function will revert if the target contract does not return the expected ack.
* @param _spender The address of the account that will be allowed to spend the tokens.
* @param _operator True if the spender is to be set as an operator. if True, id and amount should be 0.
* @param _id The ID of the token to be spent.
* @param _amount The amount of the token to be spent.
* @param _target The address of the contract to be called.
* @param _data The data to be sent to the target contract.
* @return True Returns true if the call is successful.
*/
function temporaryApproveAndCall(
address _spender,
bool _operator,
uint256 _id,
uint256 _amount,
address _target,
bytes memory _data
)
external
returns (bool)
{
_temporaryApproveAndCall({
_owner: msg.sender,
_spender: _spender,
_operator: _operator,
_id: _id,
_amount: _amount,
_target: _target,
_data: _data
});
return true;
}
/**
* @notice Temporary grants spender allowance or operator status and forwards the data to the target contract using
* a signature.
* @dev The function will revert if the signature is invalid or the target contract does not return the expected
* ack.
* @param _owner The address of the account that will be allowing the spender to spend the tokens.
* @param _spender The address of the account that will be allowed to spend the tokens.
* @param _operator True if the spender is to be set as an operator. if True, id and amount should be 0.
* @param _id The ID of the token to be spent.
* @param _amount The amount of the token to be spent.
* @param _target The address of the contract to be called.
* @param _data The data to be sent to the target contract.
* @param _nonce Unused nonce.
* @param _deadline The deadline timestamp for the signature.
* @param _signature The signature to be validated.
* @return True Returns true if the call is successful.
*/
function temporaryApproveAndCallBySig(
address _owner,
address _spender,
bool _operator,
uint256 _id,
uint256 _amount,
address _target,
bytes memory _data,
uint256 _nonce,
uint48 _deadline,
bytes memory _signature
)
external
returns (bool)
{
// if the nonce is invalid, the function will revert.
useNonce({ _from: _owner, _nonce: _nonce });
_validateApproveAndCallSignature({
_temporary: true,
_owner: _owner,
_spender: _spender,
_operator: _operator,
_id: _id,
_amount: _amount,
_target: _target,
_data: _data,
_nonce: _nonce,
_deadline: _deadline,
_signature: _signature
});
_temporaryApproveAndCall({
_owner: _owner,
_spender: _spender,
_operator: _operator,
_id: _id,
_amount: _amount,
_target: _target,
_data: _data
});
return true;
}
/**
* @notice Grants spender allowance or operator status using a signature.
* @dev The function will revert if the signature is invalid.
* @param _owner The address of the account that will be allowing the spender to spend the tokens.
* @param _spender The address of the account that will be allowed to spend the tokens.
* @param _operator True if the spender is to be set as an operator. if True, id and amount should be 0.
* @param _id The ID of the token to be spent.
* @param _amount The amount of the token to be spent.
* @param _nonce Unused nonce.
* @param _deadline The deadline timestamp for the signature.
* @param _signature The signature to be validated.
* @return True returns true if the call is successful.
*/
function approveBySig(
address _owner,
address _spender,
bool _operator,
uint256 _id,
uint256 _amount,
uint256 _nonce,
uint48 _deadline,
bytes memory _signature
)
external
returns (bool)
{
// if the nonce is invalid, the function will revert.
useNonce({ _from: _owner, _nonce: _nonce });
_validateApproveAndCallSignature({
_temporary: false,
_owner: _owner,
_spender: _spender,
_operator: _operator,
_id: _id,
_amount: _amount,
_target: address(0),
_data: "",
_nonce: _nonce,
_deadline: _deadline,
_signature: _signature
});
_setSpenderAccess({ _owner: _owner, _spender: _spender, _operator: _operator, _id: _id, _amount: _amount });
return true;
}
/* -------------------------------------------------------------------------- */
/* INTERNAL FUNCTIONS */
/* -------------------------------------------------------------------------- */
function _temporaryApproveAndCall(
address _owner,
address _spender,
bool _operator,
uint256 _id,
uint256 _amount,
address _target,
bytes memory _data
)
internal
{
(bool prevIsOperator, uint256 prevAllowance) =
_setSpenderAccess({ _owner: _owner, _spender: _spender, _operator: _operator, _id: _id, _amount: _amount });
bytes4 ack = IERC6909XCallback(_target).onTemporaryApprove({
owner: _owner,
operator: _operator,
id: _id,
amount: _amount,
data: _data
});
if (ack != IERC6909XCallback.onTemporaryApprove.selector) revert InvalidAck();
if (_operator) {
_setOperator({ _owner: _owner, _operator: _spender, _approved: prevIsOperator });
} else {
_approve({ _owner: _owner, _spender: _spender, _id: _id, _amount: prevAllowance });
}
}
function _setSpenderAccess(
address _owner,
address _spender,
bool _operator,
uint256 _id,
uint256 _amount
)
internal
returns (bool prevIsOperator, uint256 prevAllowance)
{
if (_operator) {
if (_id != 0 || _amount != 0) revert InvalidPermitParams();
prevIsOperator = isOperator[_owner][_spender];
_setOperator({ _owner: _owner, _operator: _spender, _approved: true });
} else {
prevAllowance = allowance[_owner][_spender][_id];
_approve({ _owner: _owner, _spender: _spender, _id: _id, _amount: _amount });
}
}
function _validateApproveAndCallSignature(
bool _temporary,
address _owner,
address _spender,
bool _operator,
uint256 _id,
uint256 _amount,
address _target,
bytes memory _data,
uint256 _nonce,
uint48 _deadline,
bytes memory _signature
)
internal
view
{
if (block.timestamp > _deadline) revert ExpiredSignature(_deadline);
bytes32 messageHash = _hashApproveAndCallMessage({
_temporary: _temporary,
_owner: _owner,
_spender: _spender,
_operator: _operator,
_id: _id,
_amount: _amount,
_target: _target,
_data: _data,
_nonce: _nonce,
_deadline: _deadline
});
if (!SignatureChecker.isValidSignatureNow({ signer: _owner, hash: messageHash, signature: _signature })) {
revert InvalidSigner();
}
}
function _hashApproveAndCallMessage(
bool _temporary,
address _owner,
address _spender,
bool _operator,
uint256 _id,
uint256 _amount,
address _target,
bytes memory _data,
uint256 _nonce,
uint48 _deadline
)
internal
view
returns (bytes32)
{
return _hashTypedDataV4({
structHash: keccak256(
abi.encode(
APPROVE_AND_CALL_TYPE_HASH,
_temporary,
_owner,
_spender,
_operator,
_id,
_amount,
_target,
keccak256(_data),
_nonce,
_deadline
)
)
});
}
function DOMAIN_SEPARATOR() external view virtual returns (bytes32) {
return _domainSeparatorV4();
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
/**
* @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
/**
* @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
* calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
*/
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
/**
* @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 oldAllowance = token.allowance(address(this), spender);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
}
/**
* @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
}
}
/**
* @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
* to be set to zero before setting it to a non-zero value, such as USDT.
*/
function forceApprove(IERC20 token, address spender, uint256 value) internal {
bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);
if (!_callOptionalReturnBool(token, approvalCall)) {
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
_callOptionalReturn(token, approvalCall);
}
}
/**
* @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
* Revert on invalid signature.
*/
function safePermit(
IERC20Permit token,
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) internal {
uint256 nonceBefore = token.nonces(owner);
token.permit(owner, spender, value, deadline, v, r, s);
uint256 nonceAfter = token.nonces(owner);
require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*
* This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
*/
function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
// and not revert is the subcall reverts.
(bool success, bytes memory returndata) = address(token).call(data);
return
success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
*
* Furthermore, `isContract` will also return true if the target contract within
* the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
* which only has an effect at the end of a transaction.
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/ShortStrings.sol)
pragma solidity ^0.8.8;
import "./StorageSlot.sol";
// | string | 0xAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA |
// | length | 0x BB |
type ShortString is bytes32;
/**
* @dev This library provides functions to convert short memory strings
* into a `ShortString` type that can be used as an immutable variable.
*
* Strings of arbitrary length can be optimized using this library if
* they are short enough (up to 31 bytes) by packing them with their
* length (1 byte) in a single EVM word (32 bytes). Additionally, a
* fallback mechanism can be used for every other case.
*
* Usage example:
*
* ```solidity
* contract Named {
* using ShortStrings for *;
*
* ShortString private immutable _name;
* string private _nameFallback;
*
* constructor(string memory contractName) {
* _name = contractName.toShortStringWithFallback(_nameFallback);
* }
*
* function name() external view returns (string memory) {
* return _name.toStringWithFallback(_nameFallback);
* }
* }
* ```
*/
library ShortStrings {
// Used as an identifier for strings longer than 31 bytes.
bytes32 private constant _FALLBACK_SENTINEL = 0x00000000000000000000000000000000000000000000000000000000000000FF;
error StringTooLong(string str);
error InvalidShortString();
/**
* @dev Encode a string of at most 31 chars into a `ShortString`.
*
* This will trigger a `StringTooLong` error is the input string is too long.
*/
function toShortString(string memory str) internal pure returns (ShortString) {
bytes memory bstr = bytes(str);
if (bstr.length > 31) {
revert StringTooLong(str);
}
return ShortString.wrap(bytes32(uint256(bytes32(bstr)) | bstr.length));
}
/**
* @dev Decode a `ShortString` back to a "normal" string.
*/
function toString(ShortString sstr) internal pure returns (string memory) {
uint256 len = byteLength(sstr);
// using `new string(len)` would work locally but is not memory safe.
string memory str = new string(32);
/// @solidity memory-safe-assembly
assembly {
mstore(str, len)
mstore(add(str, 0x20), sstr)
}
return str;
}
/**
* @dev Return the length of a `ShortString`.
*/
function byteLength(ShortString sstr) internal pure returns (uint256) {
uint256 result = uint256(ShortString.unwrap(sstr)) & 0xFF;
if (result > 31) {
revert InvalidShortString();
}
return result;
}
/**
* @dev Encode a string into a `ShortString`, or write it to storage if it is too long.
*/
function toShortStringWithFallback(string memory value, string storage store) internal returns (ShortString) {
if (bytes(value).length < 32) {
return toShortString(value);
} else {
StorageSlot.getStringSlot(store).value = value;
return ShortString.wrap(_FALLBACK_SENTINEL);
}
}
/**
* @dev Decode a string that was encoded to `ShortString` or written to storage using {setWithFallback}.
*/
function toStringWithFallback(ShortString value, string storage store) internal pure returns (string memory) {
if (ShortString.unwrap(value) != _FALLBACK_SENTINEL) {
return toString(value);
} else {
return store;
}
}
/**
* @dev Return the length of a string that was encoded to `ShortString` or written to storage using {setWithFallback}.
*
* WARNING: This will return the "byte length" of the string. This may not reflect the actual length in terms of
* actual characters as the UTF-8 encoding of a single character can span over multiple bytes.
*/
function byteLengthWithFallback(ShortString value, string storage store) internal view returns (uint256) {
if (ShortString.unwrap(value) != _FALLBACK_SENTINEL) {
return byteLength(value);
} else {
return bytes(store).length;
}
}
}// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.23;
import { IERC5267 } from "@openzeppelin/contracts/interfaces/IERC5267.sol";
/**
* @author https://github.com/frangio/erc6909-extensions
*/
interface IERC6909X is IERC5267 {
function temporaryApproveAndCall(
address spender,
bool operator,
uint256 id,
uint256 amount,
address target,
bytes calldata data
)
external
returns (bool);
function temporaryApproveAndCallBySig(
address owner,
address spender,
bool operator,
uint256 id,
uint256 amount,
address target,
bytes calldata data,
uint256 nonce,
uint48 deadline,
bytes calldata signature
)
external
returns (bool);
function approveBySig(
address owner,
address spender,
bool operator,
uint256 id,
uint256 amount,
uint256 nonce,
uint48 deadline,
bytes calldata signature
)
external
returns (bool);
}// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.23;
interface IERC6909XCallback {
function onTemporaryApprove(
address owner,
bool operator,
uint256 id,
uint256 amount,
bytes calldata data
)
external
returns (bytes4);
}// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.23;
/**
* @title Track user nonces.
* @dev Inspired by Uniswap's Permit2 UnorderedNonces.
*/
abstract contract UnorderedNonces {
/* -------------------------------------------------------------------------- */
/* ERRORS */
/* -------------------------------------------------------------------------- */
error InvalidNonce();
/* -------------------------------------------------------------------------- */
/* EVENTS */
/* -------------------------------------------------------------------------- */
event NonceInvalidation(address indexed owner, uint256 indexed nonce);
/* -------------------------------------------------------------------------- */
/* STORAGE */
/* -------------------------------------------------------------------------- */
/**
* @notice Mapping of token owner to a specified word to a bitmap.
* @dev word is capped at type(uint248).max.
* @dev returns a uint256 bitmap.
*/
mapping(address account => mapping(uint256 word => uint256 bitMap)) public nonceBitMap;
/* -------------------------------------------------------------------------- */
/* EXTERNAL FUNCTIONS */
/* -------------------------------------------------------------------------- */
/**
* @notice Invalidates the nonce for the msg.sender.
* @dev if the nonce is already invalidated, the function will succeed.
* @param _nonce nonce to invalidate.
*/
function invalidateNonce(uint256 _nonce) external {
(uint256 word, uint256 bit) = calculateWordAndBit(_nonce);
// flip the bit in the bitmap by taking a bitwise OR.
// if the bit is already flipped, the result will be the same.
nonceBitMap[msg.sender][word] |= bit;
emit NonceInvalidation(msg.sender, _nonce);
}
/**
* @notice Check if a nonce can be used for a given address.
* @param _from address to check.
* @param _nonce nonce to check.
* @return isValid returns true if the nonce is unused, false otherwise.
*/
function isValidNonce(address _from, uint256 _nonce) external view returns (bool) {
(uint256 word, uint256 bit) = calculateWordAndBit(_nonce);
return nonceBitMap[_from][word] & bit == 0;
}
/* -------------------------------------------------------------------------- */
/* INTERNAL FUNCTIONS */
/* -------------------------------------------------------------------------- */
function useNonce(address _from, uint256 _nonce) internal {
(uint256 word, uint256 bit) = calculateWordAndBit(_nonce);
// flip the bit in the bitmap by taking a bitwise XOR.
uint256 flipped = nonceBitMap[_from][word] ^= bit;
// check if the bit was already flipped.
if (flipped & bit == 0) revert InvalidNonce();
emit NonceInvalidation(_from, _nonce);
}
function calculateWordAndBit(uint256 _nonce) internal pure returns (uint256 word, uint256 bit) {
// word is nonce divided by 256.
word = uint256(_nonce) >> 8;
// bit is 1 shifted left by the nonce modulo 256.
bit = 1 << uint8(_nonce);
}
}// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.23;
import { IERC165 } from "../interfaces/IERC165.sol";
import { IERC6909 } from "../interfaces/IERC6909.sol";
/// @notice Minimalist and gas efficient standard ERC6909 implementation.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC6909.sol)
abstract contract ERC6909 is IERC6909 {
/* -------------------------------------------------------------------------- */
/* ERC6909 STORAGE */
/* -------------------------------------------------------------------------- */
/// @inheritdoc IERC6909
mapping(address owner => mapping(address operator => bool approved)) public isOperator;
/// @inheritdoc IERC6909
mapping(address owner => mapping(uint256 id => uint256 amount)) public balanceOf;
/// @inheritdoc IERC6909
mapping(address owner => mapping(address spender => mapping(uint256 tokenId => uint256 amount))) public allowance;
/* -------------------------------------------------------------------------- */
/* ERC6909 LOGIC */
/* -------------------------------------------------------------------------- */
/// @inheritdoc IERC6909
function transfer(address _receiver, uint256 _id, uint256 _amount) public virtual returns (bool) {
balanceOf[msg.sender][_id] -= _amount;
balanceOf[_receiver][_id] += _amount;
emit Transfer({ caller: msg.sender, sender: msg.sender, receiver: _receiver, id: _id, amount: _amount });
return true;
}
/// @inheritdoc IERC6909
function transferFrom(
address _sender,
address _receiver,
uint256 _id,
uint256 _amount
)
public
virtual
returns (bool)
{
if (msg.sender != _sender && !isOperator[_sender][msg.sender]) {
uint256 allowed = allowance[_sender][msg.sender][_id];
if (allowed != type(uint256).max) allowance[_sender][msg.sender][_id] = allowed - _amount;
}
balanceOf[_sender][_id] -= _amount;
balanceOf[_receiver][_id] += _amount;
emit Transfer({ caller: msg.sender, sender: _sender, receiver: _receiver, id: _id, amount: _amount });
return true;
}
/// @inheritdoc IERC6909
function approve(address _spender, uint256 _id, uint256 _amount) public virtual returns (bool) {
return _approve({ _owner: msg.sender, _spender: _spender, _id: _id, _amount: _amount });
}
/// @inheritdoc IERC6909
function setOperator(address _operator, bool _approved) public virtual returns (bool) {
return _setOperator({ _owner: msg.sender, _operator: _operator, _approved: _approved });
}
/* -------------------------------------------------------------------------- */
/* ERC165 LOGIC */
/* -------------------------------------------------------------------------- */
/// @inheritdoc IERC165
function supportsInterface(bytes4 _interfaceId) public view virtual returns (bool) {
return _interfaceId == type(IERC6909).interfaceId || _interfaceId == type(IERC165).interfaceId;
}
/* -------------------------------------------------------------------------- */
/* INTERNAL MINT/BURN LOGIC */
/* -------------------------------------------------------------------------- */
function _mint(address _receiver, uint256 _id, uint256 _amount) internal virtual {
balanceOf[_receiver][_id] += _amount;
emit Transfer({ caller: msg.sender, sender: address(0), receiver: _receiver, id: _id, amount: _amount });
}
function _burn(address _sender, uint256 _id, uint256 _amount) internal virtual {
balanceOf[_sender][_id] -= _amount;
emit Transfer({ caller: msg.sender, sender: _sender, receiver: address(0), id: _id, amount: _amount });
}
function _setOperator(address _owner, address _operator, bool _approved) internal virtual returns (bool) {
isOperator[_owner][_operator] = _approved;
emit OperatorSet({ owner: _owner, spender: _operator, approved: _approved });
return true;
}
function _approve(address _owner, address _spender, uint256 _id, uint256 _amount) internal virtual returns (bool) {
allowance[_owner][_spender][_id] = _amount;
emit Approval({ owner: _owner, spender: _spender, id: _id, amount: _amount });
return true;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/EIP712.sol)
pragma solidity ^0.8.8;
import "./ECDSA.sol";
import "../ShortStrings.sol";
import "../../interfaces/IERC5267.sol";
/**
* @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.
*
* The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible,
* thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding
* they need in their contracts using a combination of `abi.encode` and `keccak256`.
*
* This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
* scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
* ({_hashTypedDataV4}).
*
* The implementation of the domain separator was designed to be as efficient as possible while still properly updating
* the chain id to protect against replay attacks on an eventual fork of the chain.
*
* NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
* https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
*
* NOTE: In the upgradeable version of this contract, the cached values will correspond to the address, and the domain
* separator of the implementation contract. This will cause the `_domainSeparatorV4` function to always rebuild the
* separator from the immutable values, which is cheaper than accessing a cached version in cold storage.
*
* _Available since v3.4._
*
* @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment
*/
abstract contract EIP712 is IERC5267 {
using ShortStrings for *;
bytes32 private constant _TYPE_HASH =
keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)");
// Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to
// invalidate the cached domain separator if the chain id changes.
bytes32 private immutable _cachedDomainSeparator;
uint256 private immutable _cachedChainId;
address private immutable _cachedThis;
bytes32 private immutable _hashedName;
bytes32 private immutable _hashedVersion;
ShortString private immutable _name;
ShortString private immutable _version;
string private _nameFallback;
string private _versionFallback;
/**
* @dev Initializes the domain separator and parameter caches.
*
* The meaning of `name` and `version` is specified in
* https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:
*
* - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
* - `version`: the current major version of the signing domain.
*
* NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
* contract upgrade].
*/
constructor(string memory name, string memory version) {
_name = name.toShortStringWithFallback(_nameFallback);
_version = version.toShortStringWithFallback(_versionFallback);
_hashedName = keccak256(bytes(name));
_hashedVersion = keccak256(bytes(version));
_cachedChainId = block.chainid;
_cachedDomainSeparator = _buildDomainSeparator();
_cachedThis = address(this);
}
/**
* @dev Returns the domain separator for the current chain.
*/
function _domainSeparatorV4() internal view returns (bytes32) {
if (address(this) == _cachedThis && block.chainid == _cachedChainId) {
return _cachedDomainSeparator;
} else {
return _buildDomainSeparator();
}
}
function _buildDomainSeparator() private view returns (bytes32) {
return keccak256(abi.encode(_TYPE_HASH, _hashedName, _hashedVersion, block.chainid, address(this)));
}
/**
* @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
* function returns the hash of the fully encoded EIP712 message for this domain.
*
* This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
*
* ```solidity
* bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
* keccak256("Mail(address to,string contents)"),
* mailTo,
* keccak256(bytes(mailContents))
* )));
* address signer = ECDSA.recover(digest, signature);
* ```
*/
function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash);
}
/**
* @dev See {EIP-5267}.
*
* _Available since v4.9._
*/
function eip712Domain()
public
view
virtual
override
returns (
bytes1 fields,
string memory name,
string memory version,
uint256 chainId,
address verifyingContract,
bytes32 salt,
uint256[] memory extensions
)
{
return (
hex"0f", // 01111
_name.toStringWithFallback(_nameFallback),
_version.toStringWithFallback(_versionFallback),
block.chainid,
address(this),
bytes32(0),
new uint256[](0)
);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/SignatureChecker.sol)
pragma solidity ^0.8.0;
import "./ECDSA.sol";
import "../../interfaces/IERC1271.sol";
/**
* @dev Signature verification helper that can be used instead of `ECDSA.recover` to seamlessly support both ECDSA
* signatures from externally owned accounts (EOAs) as well as ERC1271 signatures from smart contract wallets like
* Argent and Gnosis Safe.
*
* _Available since v4.1._
*/
library SignatureChecker {
/**
* @dev Checks if a signature is valid for a given signer and data hash. If the signer is a smart contract, the
* signature is validated against that smart contract using ERC1271, otherwise it's validated using `ECDSA.recover`.
*
* NOTE: Unlike ECDSA signatures, contract signatures are revocable, and the outcome of this function can thus
* change through time. It could return true at block N and false at block N+1 (or the opposite).
*/
function isValidSignatureNow(address signer, bytes32 hash, bytes memory signature) internal view returns (bool) {
(address recovered, ECDSA.RecoverError error) = ECDSA.tryRecover(hash, signature);
return
(error == ECDSA.RecoverError.NoError && recovered == signer) ||
isValidERC1271SignatureNow(signer, hash, signature);
}
/**
* @dev Checks if a signature is valid for a given signer and data hash. The signature is validated
* against the signer smart contract using ERC1271.
*
* NOTE: Unlike ECDSA signatures, contract signatures are revocable, and the outcome of this function can thus
* change through time. It could return true at block N and false at block N+1 (or the opposite).
*/
function isValidERC1271SignatureNow(
address signer,
bytes32 hash,
bytes memory signature
) internal view returns (bool) {
(bool success, bytes memory result) = signer.staticcall(
abi.encodeWithSelector(IERC1271.isValidSignature.selector, hash, signature)
);
return (success &&
result.length >= 32 &&
abi.decode(result, (bytes32)) == bytes32(IERC1271.isValidSignature.selector));
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 amount) external returns (bool);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/IERC20Permit.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*
* ==== Security Considerations
*
* There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
* expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
* considered as an intention to spend the allowance in any specific way. The second is that because permits have
* built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
* take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
* generally recommended is:
*
* ```solidity
* function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
* try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
* doThing(..., value);
* }
*
* function doThing(..., uint256 value) public {
* token.safeTransferFrom(msg.sender, address(this), value);
* ...
* }
* ```
*
* Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
* `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
* {SafeERC20-safeTransferFrom}).
*
* Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
* contracts should have entry points that don't rely on permit.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*
* CAUTION: See Security Considerations above.
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.
pragma solidity ^0.8.0;
/**
* @dev Library for reading and writing primitive types to specific storage slots.
*
* Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
* This library helps with reading and writing to such slots without the need for inline assembly.
*
* The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
*
* Example usage to set ERC1967 implementation slot:
* ```solidity
* contract ERC1967 {
* bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
*
* function _getImplementation() internal view returns (address) {
* return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
* }
*
* function _setImplementation(address newImplementation) internal {
* require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
* StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
* }
* }
* ```
*
* _Available since v4.1 for `address`, `bool`, `bytes32`, `uint256`._
* _Available since v4.9 for `string`, `bytes`._
*/
library StorageSlot {
struct AddressSlot {
address value;
}
struct BooleanSlot {
bool value;
}
struct Bytes32Slot {
bytes32 value;
}
struct Uint256Slot {
uint256 value;
}
struct StringSlot {
string value;
}
struct BytesSlot {
bytes value;
}
/**
* @dev Returns an `AddressSlot` with member `value` located at `slot`.
*/
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BooleanSlot` with member `value` located at `slot`.
*/
function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
*/
function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Uint256Slot` with member `value` located at `slot`.
*/
function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `StringSlot` with member `value` located at `slot`.
*/
function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `StringSlot` representation of the string storage pointer `store`.
*/
function getStringSlot(string storage store) internal pure returns (StringSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := store.slot
}
}
/**
* @dev Returns an `BytesSlot` with member `value` located at `slot`.
*/
function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`.
*/
function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := store.slot
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC5267.sol)
pragma solidity ^0.8.0;
interface IERC5267 {
/**
* @dev MAY be emitted to signal that the domain could have changed.
*/
event EIP712DomainChanged();
/**
* @dev returns the fields and values that describe the domain separator used by this contract for EIP-712
* signature.
*/
function eip712Domain()
external
view
returns (
bytes1 fields,
string memory name,
string memory version,
uint256 chainId,
address verifyingContract,
bytes32 salt,
uint256[] memory extensions
);
}// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.23;
interface IERC165 {
/// @notice Checks if a contract implements an interface.
/// @param interfaceId The interface identifier, as specified in ERC-165.
/// @return supported True if the contract implements `interfaceId` and
/// `interfaceId` is not 0xffffffff, false otherwise.
function supportsInterface(bytes4 interfaceId) external view returns (bool supported);
}// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.23;
import { IERC165 } from "./IERC165.sol";
/// @title ERC6909 Core Interface
/// @author jtriley.eth
interface IERC6909 is IERC165 {
/// @notice The event emitted when a transfer occurs.
/// @param caller The caller of the transfer.
/// @param sender The address of the sender.
/// @param receiver The address of the receiver.
/// @param id The id of the token.
/// @param amount The amount of the token.
event Transfer(
address caller, address indexed sender, address indexed receiver, uint256 indexed id, uint256 amount
);
/// @notice The event emitted when an operator is set.
/// @param owner The address of the owner.
/// @param spender The address of the spender.
/// @param approved The approval status.
event OperatorSet(address indexed owner, address indexed spender, bool approved);
/// @notice The event emitted when an approval occurs.
/// @param owner The address of the owner.
/// @param spender The address of the spender.
/// @param id The id of the token.
/// @param amount The amount of the token.
event Approval(address indexed owner, address indexed spender, uint256 indexed id, uint256 amount);
/// @notice Owner balance of an id.
/// @param owner The address of the owner.
/// @param id The id of the token.
/// @return amount The balance of the token.
function balanceOf(address owner, uint256 id) external view returns (uint256 amount);
/// @notice Spender allowance of an id.
/// @param owner The address of the owner.
/// @param spender The address of the spender.
/// @param id The id of the token.
/// @return amount The allowance of the token.
function allowance(address owner, address spender, uint256 id) external view returns (uint256 amount);
/// @notice Checks if a spender is approved by an owner as an operator
/// @param owner The address of the owner.
/// @param spender The address of the spender.
/// @return approved The approval status.
function isOperator(address owner, address spender) external view returns (bool approved);
/// @notice Transfers an amount of an id from the caller to a receiver.
/// @param receiver The address of the receiver.
/// @param id The id of the token.
/// @param amount The amount of the token.
function transfer(address receiver, uint256 id, uint256 amount) external returns (bool);
/// @notice Transfers an amount of an id from a sender to a receiver.
/// @param sender The address of the sender.
/// @param receiver The address of the receiver.
/// @param id The id of the token.
/// @param amount The amount of the token.
function transferFrom(address sender, address receiver, uint256 id, uint256 amount) external returns (bool);
/// @notice Approves an amount of an id to a spender.
/// @param spender The address of the spender.
/// @param id The id of the token.
/// @param amount The amount of the token.
function approve(address spender, uint256 id, uint256 amount) external returns (bool);
/// @notice Sets or removes a spender as an operator for the caller.
/// @param spender The address of the spender.
/// @param approved The approval status.
function setOperator(address spender, bool approved) external returns (bool);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/ECDSA.sol)
pragma solidity ^0.8.0;
import "../Strings.sol";
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSA {
enum RecoverError {
NoError,
InvalidSignature,
InvalidSignatureLength,
InvalidSignatureS,
InvalidSignatureV // Deprecated in v4.8
}
function _throwError(RecoverError error) private pure {
if (error == RecoverError.NoError) {
return; // no error: do nothing
} else if (error == RecoverError.InvalidSignature) {
revert("ECDSA: invalid signature");
} else if (error == RecoverError.InvalidSignatureLength) {
revert("ECDSA: invalid signature length");
} else if (error == RecoverError.InvalidSignatureS) {
revert("ECDSA: invalid signature 's' value");
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature` or error string. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*
* _Available since v4.3._
*/
function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
/// @solidity memory-safe-assembly
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return tryRecover(hash, v, r, s);
} else {
return (address(0), RecoverError.InvalidSignatureLength);
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, signature);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.3._
*/
function tryRecover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address, RecoverError) {
bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
uint8 v = uint8((uint256(vs) >> 255) + 27);
return tryRecover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
*
* _Available since v4.2._
*/
function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, r, vs);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `v`,
* `r` and `s` signature fields separately.
*
* _Available since v4.3._
*/
function tryRecover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address, RecoverError) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
return (address(0), RecoverError.InvalidSignatureS);
}
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
if (signer == address(0)) {
return (address(0), RecoverError.InvalidSignature);
}
return (signer, RecoverError.NoError);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, v, r, s);
_throwError(error);
return recovered;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32 message) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
/// @solidity memory-safe-assembly
assembly {
mstore(0x00, "\x19Ethereum Signed Message:\n32")
mstore(0x1c, hash)
message := keccak256(0x00, 0x3c)
}
}
/**
* @dev Returns an Ethereum Signed Message, created from `s`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
}
/**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 data) {
/// @solidity memory-safe-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, "\x19\x01")
mstore(add(ptr, 0x02), domainSeparator)
mstore(add(ptr, 0x22), structHash)
data := keccak256(ptr, 0x42)
}
}
/**
* @dev Returns an Ethereum Signed Data with intended validator, created from a
* `validator` and `data` according to the version 0 of EIP-191.
*
* See {recover}.
*/
function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x00", validator, data));
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC1271.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC1271 standard signature validation method for
* contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271].
*
* _Available since v4.1._
*/
interface IERC1271 {
/**
* @dev Should return whether the signature provided is valid for the provided data
* @param hash Hash of the data to be signed
* @param signature Signature byte array associated with _data
*/
function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol)
pragma solidity ^0.8.0;
import "./math/Math.sol";
import "./math/SignedMath.sol";
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _SYMBOLS = "0123456789abcdef";
uint8 private constant _ADDRESS_LENGTH = 20;
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
unchecked {
uint256 length = Math.log10(value) + 1;
string memory buffer = new string(length);
uint256 ptr;
/// @solidity memory-safe-assembly
assembly {
ptr := add(buffer, add(32, length))
}
while (true) {
ptr--;
/// @solidity memory-safe-assembly
assembly {
mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
}
value /= 10;
if (value == 0) break;
}
return buffer;
}
}
/**
* @dev Converts a `int256` to its ASCII `string` decimal representation.
*/
function toString(int256 value) internal pure returns (string memory) {
return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value))));
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
unchecked {
return toHexString(value, Math.log256(value) + 1);
}
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
/**
* @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
*/
function toHexString(address addr) internal pure returns (string memory) {
return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
}
/**
* @dev Returns true if the two strings are equal.
*/
function equal(string memory a, string memory b) internal pure returns (bool) {
return keccak256(bytes(a)) == keccak256(bytes(b));
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)
pragma solidity ^0.8.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
enum Rounding {
Down, // Toward negative infinity
Up, // Toward infinity
Zero // Toward zero
}
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow.
return (a & b) + (a ^ b) / 2;
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds up instead
* of rounding down.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b - 1) / b can overflow on addition, so we distribute.
return a == 0 ? 0 : (a - 1) / b + 1;
}
/**
* @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
* @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
* with further edits by Uniswap Labs also under MIT license.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
unchecked {
// 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
// use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
// variables such that product = prod1 * 2^256 + prod0.
uint256 prod0; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(x, y, not(0))
prod0 := mul(x, y)
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division.
if (prod1 == 0) {
// Solidity will revert if denominator == 0, unlike the div opcode on its own.
// The surrounding unchecked block does not change this fact.
// See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
return prod0 / denominator;
}
// Make sure the result is less than 2^256. Also prevents denominator == 0.
require(denominator > prod1, "Math: mulDiv overflow");
///////////////////////////////////////////////
// 512 by 256 division.
///////////////////////////////////////////////
// Make division exact by subtracting the remainder from [prod1 prod0].
uint256 remainder;
assembly {
// Compute remainder using mulmod.
remainder := mulmod(x, y, denominator)
// Subtract 256 bit number from 512 bit number.
prod1 := sub(prod1, gt(remainder, prod0))
prod0 := sub(prod0, remainder)
}
// Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
// See https://cs.stackexchange.com/q/138556/92363.
// Does not overflow because the denominator cannot be zero at this stage in the function.
uint256 twos = denominator & (~denominator + 1);
assembly {
// Divide denominator by twos.
denominator := div(denominator, twos)
// Divide [prod1 prod0] by twos.
prod0 := div(prod0, twos)
// Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
twos := add(div(sub(0, twos), twos), 1)
}
// Shift in bits from prod1 into prod0.
prod0 |= prod1 * twos;
// Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
// that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
// four bits. That is, denominator * inv = 1 mod 2^4.
uint256 inverse = (3 * denominator) ^ 2;
// Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
// in modular arithmetic, doubling the correct bits in each step.
inverse *= 2 - denominator * inverse; // inverse mod 2^8
inverse *= 2 - denominator * inverse; // inverse mod 2^16
inverse *= 2 - denominator * inverse; // inverse mod 2^32
inverse *= 2 - denominator * inverse; // inverse mod 2^64
inverse *= 2 - denominator * inverse; // inverse mod 2^128
inverse *= 2 - denominator * inverse; // inverse mod 2^256
// Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
// This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
// less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
// is no longer required.
result = prod0 * inverse;
return result;
}
}
/**
* @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
uint256 result = mulDiv(x, y, denominator);
if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
result += 1;
}
return result;
}
/**
* @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
*
* Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
*/
function sqrt(uint256 a) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
// For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
//
// We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
// `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
//
// This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
// → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
// → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
//
// Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
uint256 result = 1 << (log2(a) >> 1);
// At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
// since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
// every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
// into the expected uint128 result.
unchecked {
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
return min(result, a / result);
}
}
/**
* @notice Calculates sqrt(a), following the selected rounding direction.
*/
function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = sqrt(a);
return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
}
}
/**
* @dev Return the log in base 2, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 128;
}
if (value >> 64 > 0) {
value >>= 64;
result += 64;
}
if (value >> 32 > 0) {
value >>= 32;
result += 32;
}
if (value >> 16 > 0) {
value >>= 16;
result += 16;
}
if (value >> 8 > 0) {
value >>= 8;
result += 8;
}
if (value >> 4 > 0) {
value >>= 4;
result += 4;
}
if (value >> 2 > 0) {
value >>= 2;
result += 2;
}
if (value >> 1 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 2, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log2(value);
return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 10, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >= 10 ** 64) {
value /= 10 ** 64;
result += 64;
}
if (value >= 10 ** 32) {
value /= 10 ** 32;
result += 32;
}
if (value >= 10 ** 16) {
value /= 10 ** 16;
result += 16;
}
if (value >= 10 ** 8) {
value /= 10 ** 8;
result += 8;
}
if (value >= 10 ** 4) {
value /= 10 ** 4;
result += 4;
}
if (value >= 10 ** 2) {
value /= 10 ** 2;
result += 2;
}
if (value >= 10 ** 1) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 10, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log10(value);
return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 256, rounded down, of a positive value.
* Returns 0 if given 0.
*
* Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
*/
function log256(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 16;
}
if (value >> 64 > 0) {
value >>= 64;
result += 8;
}
if (value >> 32 > 0) {
value >>= 32;
result += 4;
}
if (value >> 16 > 0) {
value >>= 16;
result += 2;
}
if (value >> 8 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 256, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log256(value);
return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol)
pragma solidity ^0.8.0;
/**
* @dev Standard signed math utilities missing in the Solidity language.
*/
library SignedMath {
/**
* @dev Returns the largest of two signed numbers.
*/
function max(int256 a, int256 b) internal pure returns (int256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two signed numbers.
*/
function min(int256 a, int256 b) internal pure returns (int256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two signed numbers without overflow.
* The result is rounded towards zero.
*/
function average(int256 a, int256 b) internal pure returns (int256) {
// Formula from the book "Hacker's Delight"
int256 x = (a & b) + ((a ^ b) >> 1);
return x + (int256(uint256(x) >> 255) & (a ^ b));
}
/**
* @dev Returns the absolute unsigned value of a signed value.
*/
function abs(int256 n) internal pure returns (uint256) {
unchecked {
// must be unchecked in order to support `n = type(int256).min`
return uint256(n >= 0 ? n : -n);
}
}
}{
"remappings": [
"@prb/test/=node_modules/@prb/test/src/",
"forge-std/=node_modules/forge-std/src/",
"@openzeppelin/contracts/=node_modules/@openzeppelin/contracts/",
"solady/=node_modules/solady/src/"
],
"optimizer": {
"enabled": true,
"runs": 5000000
},
"metadata": {
"useLiteralContent": false,
"bytecodeHash": "ipfs",
"appendCBOR": true
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"abi"
]
}
},
"evmVersion": "shanghai",
"viaIR": true,
"libraries": {}
}Contract ABI
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SplitsWarehouse.WithdrawConfig","name":"_config","type":"tuple"}],"name":"setWithdrawConfig","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"_interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"supported","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"}],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_spender","type":"address"},{"internalType":"bool","name":"_operator","type":"bool"},{"internalType":"uint256","name":"_id","type":"uint256"},{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"address","name":"_target","type":"address"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"temporaryApproveAndCall","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"},{"internalType":"address","name":"_spender","type":"address"},{"internalType":"bool","name":"_operator","type":"bool"},{"internalType":"uint256","name":"_id","type":"uint256"},{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"address","name":"_target","type":"address"},{"internalType":"bytes","name":"_data","type":"bytes"},{"internalType":"uint256","name":"_nonce","type":"uint256"},{"internalType":"uint48","name":"_deadline","type":"uint48"},{"internalType":"bytes","name":"_signature","type":"bytes"}],"name":"temporaryApproveAndCallBySig","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_receiver","type":"address"},{"internalType":"uint256","name":"_id","type":"uint256"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_sender","type":"address"},{"internalType":"address","name":"_receiver","type":"address"},{"internalType":"uint256","name":"_id","type":"uint256"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"},{"internalType":"address[]","name":"_tokens","type":"address[]"},{"internalType":"uint256[]","name":"_amounts","type":"uint256[]"},{"internalType":"address","name":"_withdrawer","type":"address"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"},{"internalType":"address","name":"_token","type":"address"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"withdrawConfig","outputs":[{"internalType":"uint16","name":"incentive","type":"uint16"},{"internalType":"bool","name":"paused","type":"bool"}],"stateMutability":"view","type":"function"}]Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000001453706c6974732057726170706564204574686572000000000000000000000000000000000000000000000000000000000000000000000000000000000000000973706c6974734554480000000000000000000000000000000000000000000000
-----Decoded View---------------
Arg [0] : _native_token_name (string): Splits Wrapped Ether
Arg [1] : _native_token_symbol (string): splitsETH
-----Encoded View---------------
6 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000040
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000014
Arg [3] : 53706c6974732057726170706564204574686572000000000000000000000000
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000009
Arg [5] : 73706c6974734554480000000000000000000000000000000000000000000000
Deployed Bytecode Sourcemap
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Swarm Source
ipfs://44605f36cd509b52f51e0b7e4bf7df4fd8f23b37a10d536036d532c762041929
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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.