ERC-721
Overview
Max Total Supply
84 xsLOCK
Holders
73
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
Balance
1 xsLOCKLoading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
xsLocker
Compiler Version
v0.8.6+commit.11564f7e
Optimization Enabled:
Yes with 800 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.6; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/contracts/token/ERC20/extensions/draft-ERC20Permit.sol"; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol"; import "@openzeppelin/contracts/utils/structs/EnumerableMap.sol"; import "@openzeppelin/contracts/utils/cryptography/draft-EIP712.sol"; import "./../utils/ERC721Enhanced.sol"; import "./../utils/Governable.sol"; import "./../interfaces/staking/IxsListener.sol"; import "./../interfaces/staking/IxsLocker.sol"; /** * @title xsLocker * @author solace.fi * @notice Stake your [**SOLACE**](./../SOLACE) to receive voting rights, [**SOLACE**](./../SOLACE) rewards, and more. * * Locks are ERC721s and can be viewed with [`locks()`](#locks). Each lock has an `amount` of [**SOLACE**](./../SOLACE) and an `end` timestamp and cannot be transferred or withdrawn from before it unlocks. Locks have a maximum duration of four years. * * Users can create locks via [`createLock()`](#createlock) or [`createLockSigned()`](#createlocksigned), deposit more [**SOLACE**](./../SOLACE) into a lock via [`increaseAmount()`](#increaseamount) or [`increaseAmountSigned()`](#increaseamountsigned), extend a lock via [`extendLock()`](#extendlock), and withdraw via [`withdraw()`](#withdraw), [`withdrawInPart()`](#withdrawinpart), or [`withdrawMany()`](#withdrawmany). * * Users and contracts (eg BondTellers) may deposit on behalf of another user or contract. * * Any time a lock is updated it will notify the listener contracts (eg StakingRewards). * * Note that transferring [**SOLACE**](./../SOLACE) to this contract will not give you any rewards. You should deposit your [**SOLACE**](./../SOLACE) via [`createLock()`](#createlock) or [`createLockSigned()`](#createlocksigned). */ // solhint-disable-next-line contract-name-camelcase contract xsLocker is IxsLocker, ERC721Enhanced, ReentrancyGuard, Governable { using EnumerableSet for EnumerableSet.AddressSet; /*************************************** GLOBAL VARIABLES ***************************************/ /// @notice [**SOLACE**](./../SOLACE) token. address public override solace; /// @notice The maximum time into the future that a lock can expire. uint256 public constant override MAX_LOCK_DURATION = 4 * (365 days); /// @notice The total number of locks that have been created. uint256 public override totalNumLocks; // Info on locks mapping(uint256 => Lock) private _locks; // Contracts that listen for lock changes EnumerableSet.AddressSet private _xsLockListeners; /** * @notice Construct the xsLocker contract. * @param governance_ The address of the [governor](/docs/protocol/governance). * @param solace_ Address of [**SOLACE**](./../SOLACE). */ constructor(address governance_, address solace_) ERC721Enhanced("xsolace lock", "xsLOCK") Governable(governance_) { require(solace_ != address(0x0), "zero address solace"); solace = solace_; } /*************************************** VIEW FUNCTIONS ***************************************/ /** * @notice Information about a lock. * @param xsLockID The ID of the lock to query. * @return lock_ Information about the lock. */ function locks(uint256 xsLockID) external view override tokenMustExist(xsLockID) returns (Lock memory lock_) { return _locks[xsLockID]; } /** * @notice Determines if the lock is locked. * @param xsLockID The ID of the lock to query. * @return locked True if the lock is locked, false if unlocked. */ function isLocked(uint256 xsLockID) external view override tokenMustExist(xsLockID) returns (bool locked) { // solhint-disable-next-line not-rely-on-time return _locks[xsLockID].end > block.timestamp; } /** * @notice Determines the time left until the lock unlocks. * @param xsLockID The ID of the lock to query. * @return time The time left in seconds, 0 if unlocked. */ function timeLeft(uint256 xsLockID) external view override tokenMustExist(xsLockID) returns (uint256 time) { // solhint-disable-next-line not-rely-on-time return (_locks[xsLockID].end > block.timestamp) // solhint-disable-next-line not-rely-on-time ? _locks[xsLockID].end - block.timestamp // locked : 0; // unlocked } /** * @notice Returns the amount of [**SOLACE**](./../SOLACE) the user has staked. * @param account The account to query. * @return balance The user's balance. */ function stakedBalance(address account) external view override returns (uint256 balance) { uint256 numOfLocks = balanceOf(account); balance = 0; for (uint256 i = 0; i < numOfLocks; i++) { uint256 xsLockID = tokenOfOwnerByIndex(account, i); balance += _locks[xsLockID].amount; } return balance; } /** * @notice The list of contracts that are listening to lock updates. * @return listeners_ The list as an array. */ function getXsLockListeners() external view override returns (address[] memory listeners_) { uint256 len = _xsLockListeners.length(); listeners_ = new address[](len); for(uint256 index = 0; index < len; index++) { listeners_[index] = _xsLockListeners.at(index); } return listeners_; } /*************************************** MUTATOR FUNCTIONS ***************************************/ /** * @notice Deposit [**SOLACE**](./../SOLACE) to create a new lock. * @dev [**SOLACE**](./../SOLACE) is transferred from msg.sender, assumes its already approved. * @dev use end=0 to initialize as unlocked. * @param recipient The account that will receive the lock. * @param amount The amount of [**SOLACE**](./../SOLACE) to deposit. * @param end The timestamp the lock will unlock. * @return xsLockID The ID of the newly created lock. */ function createLock(address recipient, uint256 amount, uint256 end) external override nonReentrant returns (uint256 xsLockID) { // pull solace SafeERC20.safeTransferFrom(IERC20(solace), msg.sender, address(this), amount); // accounting return _createLock(recipient, amount, end); } /** * @notice Deposit [**SOLACE**](./../SOLACE) to create a new lock. * @dev [**SOLACE**](./../SOLACE) is transferred from msg.sender using ERC20Permit. * @dev use end=0 to initialize as unlocked. * @dev recipient = msg.sender * @param amount The amount of [**SOLACE**](./../SOLACE) to deposit. * @param end The timestamp the lock will unlock. * @param deadline Time the transaction must go through before. * @param v secp256k1 signature * @param r secp256k1 signature * @param s secp256k1 signature * @return xsLockID The ID of the newly created lock. */ function createLockSigned(uint256 amount, uint256 end, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external override nonReentrant returns (uint256 xsLockID) { // permit IERC20Permit(solace).permit(msg.sender, address(this), amount, deadline, v, r, s); // pull solace SafeERC20.safeTransferFrom(IERC20(solace), msg.sender, address(this), amount); // accounting return _createLock(msg.sender, amount, end); } /** * @notice Deposit [**SOLACE**](./../SOLACE) to increase the value of an existing lock. * @dev [**SOLACE**](./../SOLACE) is transferred from msg.sender, assumes its already approved. * @param xsLockID The ID of the lock to update. * @param amount The amount of [**SOLACE**](./../SOLACE) to deposit. */ function increaseAmount(uint256 xsLockID, uint256 amount) external override nonReentrant tokenMustExist(xsLockID) { // pull solace SafeERC20.safeTransferFrom(IERC20(solace), msg.sender, address(this), amount); // accounting uint256 newAmount = _locks[xsLockID].amount + amount; _updateLock(xsLockID, newAmount, _locks[xsLockID].end); } /** * @notice Deposit [**SOLACE**](./../SOLACE) to increase the value of an existing lock. * @dev [**SOLACE**](./../SOLACE) is transferred from msg.sender using ERC20Permit. * @param xsLockID The ID of the lock to update. * @param amount The amount of [**SOLACE**](./../SOLACE) to deposit. * @param deadline Time the transaction must go through before. * @param v secp256k1 signature * @param r secp256k1 signature * @param s secp256k1 signature */ function increaseAmountSigned(uint256 xsLockID, uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external override nonReentrant tokenMustExist(xsLockID) { // permit IERC20Permit(solace).permit(msg.sender, address(this), amount, deadline, v, r, s); // pull solace SafeERC20.safeTransferFrom(IERC20(solace), msg.sender, address(this), amount); // accounting uint256 newAmount = _locks[xsLockID].amount + amount; _updateLock(xsLockID, newAmount, _locks[xsLockID].end); } /** * @notice Extend a lock's duration. * @dev Can only be called by the lock owner or approved. * @param xsLockID The ID of the lock to update. * @param end The new time for the lock to unlock. */ function extendLock(uint256 xsLockID, uint256 end) external override nonReentrant onlyOwnerOrApproved(xsLockID) { // solhint-disable-next-line not-rely-on-time require(end <= block.timestamp + MAX_LOCK_DURATION, "Max lock is 4 years"); require(_locks[xsLockID].end <= end, "not extended"); _updateLock(xsLockID, _locks[xsLockID].amount, end); } /** * @notice Withdraw from a lock in full. * @dev Can only be called by the lock owner or approved. * @dev Can only be called if unlocked. * @param xsLockID The ID of the lock to withdraw from. * @param recipient The user to receive the lock's [**SOLACE**](./../SOLACE). */ function withdraw(uint256 xsLockID, address recipient) external override nonReentrant onlyOwnerOrApproved(xsLockID) { uint256 amount = _locks[xsLockID].amount; _withdraw(xsLockID, amount); // transfer solace SafeERC20.safeTransfer(IERC20(solace), recipient, amount); } /** * @notice Withdraw from a lock in part. * @dev Can only be called by the lock owner or approved. * @dev Can only be called if unlocked. * @param xsLockID The ID of the lock to withdraw from. * @param recipient The user to receive the lock's [**SOLACE**](./../SOLACE). * @param amount The amount of [**SOLACE**](./../SOLACE) to withdraw. */ function withdrawInPart(uint256 xsLockID, address recipient, uint256 amount) external override nonReentrant onlyOwnerOrApproved(xsLockID) { require(amount <= _locks[xsLockID].amount, "excess withdraw"); _withdraw(xsLockID, amount); // transfer solace SafeERC20.safeTransfer(IERC20(solace), recipient, amount); } /** * @notice Withdraw from multiple locks in full. * @dev Can only be called by the lock owner or approved. * @dev Can only be called if unlocked. * @param xsLockIDs The ID of the locks to withdraw from. * @param recipient The user to receive the lock's [**SOLACE**](./../SOLACE). */ function withdrawMany(uint256[] calldata xsLockIDs, address recipient) external override nonReentrant { uint256 len = xsLockIDs.length; uint256 amount = 0; for(uint256 i = 0; i < len; i++) { uint256 xsLockID = xsLockIDs[i]; require(_isApprovedOrOwner(msg.sender, xsLockID), "only owner or approved"); uint256 amount_ = _locks[xsLockID].amount; amount += amount_; _withdraw(xsLockID, amount_); } // transfer solace SafeERC20.safeTransfer(IERC20(solace), recipient, amount); } /*************************************** HELPER FUNCTIONS ***************************************/ /** * @notice Creates a new lock. * @param recipient The user that the lock will be minted to. * @param amount The amount of [**SOLACE**](./../SOLACE) in the lock. * @param end The end of the lock. * @param xsLockID The ID of the new lock. */ function _createLock(address recipient, uint256 amount, uint256 end) internal returns (uint256 xsLockID) { xsLockID = ++totalNumLocks; Lock memory newLock = Lock(amount, end); // solhint-disable-next-line not-rely-on-time require(newLock.end <= block.timestamp + MAX_LOCK_DURATION, "Max lock is 4 years"); // accounting _locks[xsLockID] = newLock; _safeMint(recipient, xsLockID); emit LockCreated(xsLockID); } /** * @notice Updates an existing lock. * @param xsLockID The ID of the lock to update. * @param amount The amount of [**SOLACE**](./../SOLACE) now in the lock. * @param end The end of the lock. */ function _updateLock(uint256 xsLockID, uint256 amount, uint256 end) internal { // checks Lock memory prevLock = _locks[xsLockID]; Lock memory newLock = Lock(amount, end); // end was sanitized before passed in // accounting _locks[xsLockID] = newLock; address owner = ownerOf(xsLockID); _notify(xsLockID, owner, owner, prevLock, newLock); emit LockUpdated(xsLockID, amount, newLock.end); } /** * @notice Withdraws from a lock. * @param xsLockID The ID of the lock to withdraw from. * @param amount The amount of [**SOLACE**](./../SOLACE) to withdraw. */ function _withdraw(uint256 xsLockID, uint256 amount) internal { // solhint-disable-next-line not-rely-on-time require(_locks[xsLockID].end <= block.timestamp, "locked"); // cannot withdraw while locked // accounting if(amount == _locks[xsLockID].amount) { _burn(xsLockID); delete _locks[xsLockID]; } else { Lock memory oldLock = _locks[xsLockID]; Lock memory newLock = Lock(oldLock.amount-amount, oldLock.end); _locks[xsLockID].amount -= amount; address owner = ownerOf(xsLockID); _notify(xsLockID, owner, owner, oldLock, newLock); } emit Withdrawl(xsLockID, amount); } /** * @notice Hook that is called after any token transfer. This includes minting and burning. * @param from The user that sends the token, or zero if minting. * @param to The zero that receives the token, or zero if burning. * @param xsLockID The ID of the token being transferred. */ function _afterTokenTransfer( address from, address to, uint256 xsLockID ) internal override { super._afterTokenTransfer(from, to, xsLockID); Lock memory lock = _locks[xsLockID]; // notify listeners if(from == address(0x0)) _notify(xsLockID, from, to, Lock(0, 0), lock); // mint else if(to == address(0x0)) _notify(xsLockID, from, to, lock, Lock(0, 0)); // burn else { // transfer // solhint-disable-next-line not-rely-on-time require(lock.end <= block.timestamp, "locked"); // cannot transfer while locked _notify(xsLockID, from, to, lock, lock); } } /** * @notice Notify the listeners of any updates. * @dev Called on transfer, mint, burn, and update. * Either the owner will change or the lock will change, not both. * @param xsLockID The ID of the lock that was altered. * @param oldOwner The old owner of the lock. * @param newOwner The new owner of the lock. * @param oldLock The old lock data. * @param newLock The new lock data. */ function _notify(uint256 xsLockID, address oldOwner, address newOwner, Lock memory oldLock, Lock memory newLock) internal { // register action with listener uint256 len = _xsLockListeners.length(); for(uint256 i = 0; i < len; i++) { IxsListener(_xsLockListeners.at(i)).registerLockEvent(xsLockID, oldOwner, newOwner, oldLock, newLock); } } /*************************************** GOVERNANCE FUNCTIONS ***************************************/ /** * @notice Adds a listener. * Can only be called by the current [**governor**](/docs/protocol/governance). * @param listener The listener to add. */ function addXsLockListener(address listener) external override onlyGovernance { _xsLockListeners.add(listener); emit xsLockListenerAdded(listener); } /** * @notice Removes a listener. * Can only be called by the current [**governor**](/docs/protocol/governance). * @param listener The listener to remove. */ function removeXsLockListener(address listener) external override onlyGovernance { _xsLockListeners.remove(listener); emit xsLockListenerRemoved(listener); } /** * @notice Sets the base URI for computing `tokenURI`. * Can only be called by the current [**governor**](/docs/protocol/governance). * @param baseURI_ The new base URI. */ function setBaseURI(string memory baseURI_) external override onlyGovernance { _setBaseURI(baseURI_); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../IERC20.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; function safeTransfer( IERC20 token, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } 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)); } function safeIncreaseAllowance( IERC20 token, address spender, uint256 value ) internal { uint256 newAllowance = token.allowance(address(this), spender) + value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } 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"); uint256 newAllowance = oldAllowance - value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } } /** * @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"); if (returndata.length > 0) { // Return data is optional require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./draft-IERC20Permit.sol"; import "../ERC20.sol"; import "../../../utils/cryptography/draft-EIP712.sol"; import "../../../utils/cryptography/ECDSA.sol"; import "../../../utils/Counters.sol"; /** * @dev Implementation of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. * * _Available since v3.4._ */ abstract contract ERC20Permit is ERC20, IERC20Permit, EIP712 { using Counters for Counters.Counter; mapping(address => Counters.Counter) private _nonces; // solhint-disable-next-line var-name-mixedcase bytes32 private immutable _PERMIT_TYPEHASH = keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"); /** * @dev Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `"1"`. * * It's a good idea to use the same `name` that is defined as the ERC20 token name. */ constructor(string memory name) EIP712(name, "1") {} /** * @dev See {IERC20Permit-permit}. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) public virtual override { require(block.timestamp <= deadline, "ERC20Permit: expired deadline"); bytes32 structHash = keccak256(abi.encode(_PERMIT_TYPEHASH, owner, spender, value, _useNonce(owner), deadline)); bytes32 hash = _hashTypedDataV4(structHash); address signer = ECDSA.recover(hash, v, r, s); require(signer == owner, "ERC20Permit: invalid signature"); _approve(owner, spender, value); } /** * @dev See {IERC20Permit-nonces}. */ function nonces(address owner) public view virtual override returns (uint256) { return _nonces[owner].current(); } /** * @dev See {IERC20Permit-DOMAIN_SEPARATOR}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view override returns (bytes32) { return _domainSeparatorV4(); } /** * @dev "Consume a nonce": return the current value and increment. * * _Available since v4.1._ */ function _useNonce(address owner) internal virtual returns (uint256 current) { Counters.Counter storage nonce = _nonces[owner]; current = nonce.current(); nonce.increment(); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @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 `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, 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 `sender` to `recipient` 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 sender, address recipient, uint256 amount ) external returns (bool); /** * @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); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor() { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and make it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) * and `uint256` (`UintSet`) are supported. */ library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping(bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; if (lastIndex != toDeleteIndex) { bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex } // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { return set._values[index]; } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function _values(Set storage set) private view returns (bytes32[] memory) { return set._values; } // Bytes32Set struct Bytes32Set { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _add(set._inner, value); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _remove(set._inner, value); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return _contains(set._inner, value); } /** * @dev Returns the number of values in the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return _at(set._inner, index); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(Bytes32Set storage set) internal view returns (bytes32[] memory) { return _values(set._inner); } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint160(uint256(_at(set._inner, index)))); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(AddressSet storage set) internal view returns (address[] memory) { bytes32[] memory store = _values(set._inner); address[] memory result; assembly { result := store } return result; } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(UintSet storage set) internal view returns (uint256[] memory) { bytes32[] memory store = _values(set._inner); uint256[] memory result; assembly { result := store } return result; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./EnumerableSet.sol"; /** * @dev Library for managing an enumerable variant of Solidity's * https://solidity.readthedocs.io/en/latest/types.html#mapping-types[`mapping`] * type. * * Maps have the following properties: * * - Entries are added, removed, and checked for existence in constant time * (O(1)). * - Entries are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableMap for EnumerableMap.UintToAddressMap; * * // Declare a set state variable * EnumerableMap.UintToAddressMap private myMap; * } * ``` * * As of v3.0.0, only maps of type `uint256 -> address` (`UintToAddressMap`) are * supported. */ library EnumerableMap { using EnumerableSet for EnumerableSet.Bytes32Set; // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Map type with // bytes32 keys and values. // The Map implementation uses private functions, and user-facing // implementations (such as Uint256ToAddressMap) are just wrappers around // the underlying Map. // This means that we can only create new EnumerableMaps for types that fit // in bytes32. struct Map { // Storage of keys EnumerableSet.Bytes32Set _keys; mapping(bytes32 => bytes32) _values; } /** * @dev Adds a key-value pair to a map, or updates the value for an existing * key. O(1). * * Returns true if the key was added to the map, that is if it was not * already present. */ function _set( Map storage map, bytes32 key, bytes32 value ) private returns (bool) { map._values[key] = value; return map._keys.add(key); } /** * @dev Removes a key-value pair from a map. O(1). * * Returns true if the key was removed from the map, that is if it was present. */ function _remove(Map storage map, bytes32 key) private returns (bool) { delete map._values[key]; return map._keys.remove(key); } /** * @dev Returns true if the key is in the map. O(1). */ function _contains(Map storage map, bytes32 key) private view returns (bool) { return map._keys.contains(key); } /** * @dev Returns the number of key-value pairs in the map. O(1). */ function _length(Map storage map) private view returns (uint256) { return map._keys.length(); } /** * @dev Returns the key-value pair stored at position `index` in the map. O(1). * * Note that there are no guarantees on the ordering of entries inside the * array, and it may change when more entries are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Map storage map, uint256 index) private view returns (bytes32, bytes32) { bytes32 key = map._keys.at(index); return (key, map._values[key]); } /** * @dev Tries to returns the value associated with `key`. O(1). * Does not revert if `key` is not in the map. */ function _tryGet(Map storage map, bytes32 key) private view returns (bool, bytes32) { bytes32 value = map._values[key]; if (value == bytes32(0)) { return (_contains(map, key), bytes32(0)); } else { return (true, value); } } /** * @dev Returns the value associated with `key`. O(1). * * Requirements: * * - `key` must be in the map. */ function _get(Map storage map, bytes32 key) private view returns (bytes32) { bytes32 value = map._values[key]; require(value != 0 || _contains(map, key), "EnumerableMap: nonexistent key"); return value; } /** * @dev Same as {_get}, with a custom error message when `key` is not in the map. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {_tryGet}. */ function _get( Map storage map, bytes32 key, string memory errorMessage ) private view returns (bytes32) { bytes32 value = map._values[key]; require(value != 0 || _contains(map, key), errorMessage); return value; } // UintToAddressMap struct UintToAddressMap { Map _inner; } /** * @dev Adds a key-value pair to a map, or updates the value for an existing * key. O(1). * * Returns true if the key was added to the map, that is if it was not * already present. */ function set( UintToAddressMap storage map, uint256 key, address value ) internal returns (bool) { return _set(map._inner, bytes32(key), bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the key was removed from the map, that is if it was present. */ function remove(UintToAddressMap storage map, uint256 key) internal returns (bool) { return _remove(map._inner, bytes32(key)); } /** * @dev Returns true if the key is in the map. O(1). */ function contains(UintToAddressMap storage map, uint256 key) internal view returns (bool) { return _contains(map._inner, bytes32(key)); } /** * @dev Returns the number of elements in the map. O(1). */ function length(UintToAddressMap storage map) internal view returns (uint256) { return _length(map._inner); } /** * @dev Returns the element stored at position `index` in the set. O(1). * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintToAddressMap storage map, uint256 index) internal view returns (uint256, address) { (bytes32 key, bytes32 value) = _at(map._inner, index); return (uint256(key), address(uint160(uint256(value)))); } /** * @dev Tries to returns the value associated with `key`. O(1). * Does not revert if `key` is not in the map. * * _Available since v3.4._ */ function tryGet(UintToAddressMap storage map, uint256 key) internal view returns (bool, address) { (bool success, bytes32 value) = _tryGet(map._inner, bytes32(key)); return (success, address(uint160(uint256(value)))); } /** * @dev Returns the value associated with `key`. O(1). * * Requirements: * * - `key` must be in the map. */ function get(UintToAddressMap storage map, uint256 key) internal view returns (address) { return address(uint160(uint256(_get(map._inner, bytes32(key))))); } /** * @dev Same as {get}, with a custom error message when `key` is not in the map. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryGet}. */ function get( UintToAddressMap storage map, uint256 key, string memory errorMessage ) internal view returns (address) { return address(uint160(uint256(_get(map._inner, bytes32(key), errorMessage)))); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./ECDSA.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]. * * _Available since v3.4._ */ abstract contract EIP712 { /* solhint-disable var-name-mixedcase */ // 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 _CACHED_DOMAIN_SEPARATOR; uint256 private immutable _CACHED_CHAIN_ID; bytes32 private immutable _HASHED_NAME; bytes32 private immutable _HASHED_VERSION; bytes32 private immutable _TYPE_HASH; /* solhint-enable var-name-mixedcase */ /** * @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) { bytes32 hashedName = keccak256(bytes(name)); bytes32 hashedVersion = keccak256(bytes(version)); bytes32 typeHash = keccak256( "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)" ); _HASHED_NAME = hashedName; _HASHED_VERSION = hashedVersion; _CACHED_CHAIN_ID = block.chainid; _CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(typeHash, hashedName, hashedVersion); _TYPE_HASH = typeHash; } /** * @dev Returns the domain separator for the current chain. */ function _domainSeparatorV4() internal view returns (bytes32) { if (block.chainid == _CACHED_CHAIN_ID) { return _CACHED_DOMAIN_SEPARATOR; } else { return _buildDomainSeparator(_TYPE_HASH, _HASHED_NAME, _HASHED_VERSION); } } function _buildDomainSeparator( bytes32 typeHash, bytes32 nameHash, bytes32 versionHash ) private view returns (bytes32) { return keccak256(abi.encode(typeHash, nameHash, versionHash, 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); } }
// SPDX-License-Identifier: GPL-3.0-or-later // code borrowed from OpenZeppelin and @uniswap/v3-periphery pragma solidity 0.8.6; import "@openzeppelin/contracts/utils/cryptography/draft-EIP712.sol"; import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol"; import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol"; import "@openzeppelin/contracts/utils/Strings.sol"; import "./../interfaces/utils/IERC1271.sol"; import "./../interfaces/utils/IERC721Enhanced.sol"; /** * @title ERC721Enhancedv1 * @author solace.fi * @notice An extension of `ERC721`. * * The base is OpenZeppelin's `ERC721Enumerable` which also includes the `Metadata` extension. This extension includes simpler transfers, gasless approvals, and changeable URIs. */ abstract contract ERC721Enhanced is ERC721Enumerable, IERC721Enhanced, EIP712 { using Strings for uint256; /// @dev The nonces used in the permit signature verification. /// tokenID => nonce mapping(uint256 => uint256) private _nonces; /// @dev Value is equal to keccak256("Permit(address spender,uint256 tokenID,uint256 nonce,uint256 deadline)"); // solhint-disable-next-line var-name-mixedcase bytes32 private immutable _PERMIT_TYPEHASH = 0x137406564cdcf9b40b1700502a9241e87476728da7ae3d0edfcf0541e5b49b3e; string public baseURI; /** * @notice Constructs the `ERC721Enhancedv1` contract. * @param name_ The name of the token. * @param symbol_ The symbol of the token. */ constructor( string memory name_, string memory symbol_ ) ERC721(name_, symbol_) EIP712(name_, "1") { baseURI = ""; } /*************************************** SIMPLER TRANSFERS ***************************************/ /** * @notice Transfers `tokenID` from `msg.sender` to `to`. * @dev This was excluded from the official `ERC721` standard in favor of `transferFrom(address from, address to, uint256 tokenID)`. We elect to include it. * @param to The receipient of the token. * @param tokenID The token to transfer. */ function transfer(address to, uint256 tokenID) public override { super.transferFrom(msg.sender, to, tokenID); } /** * @notice Safely transfers `tokenID` from `msg.sender` to `to`. * @dev This was excluded from the official `ERC721` standard in favor of `safeTransferFrom(address from, address to, uint256 tokenID)`. We elect to include it. * @param to The receipient of the token. * @param tokenID The token to transfer. */ function safeTransfer(address to, uint256 tokenID) public override { super.safeTransferFrom(msg.sender, to, tokenID, ""); } /*************************************** GASLESS APPROVALS ***************************************/ /** * @notice Approve of a specific `tokenID` for spending by `spender` via signature. * @param spender The account that is being approved. * @param tokenID The ID of the token that is being approved for spending. * @param deadline The deadline timestamp by which the call must be mined for the approve to work. * @param v Must produce valid secp256k1 signature from the holder along with `r` and `s`. * @param r Must produce valid secp256k1 signature from the holder along with `v` and `s`. * @param s Must produce valid secp256k1 signature from the holder along with `r` and `v`. */ function permit( address spender, uint256 tokenID, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external override { require(_exists(tokenID), "query for nonexistent token"); // solhint-disable-next-line not-rely-on-time require(block.timestamp <= deadline, "permit expired"); uint256 nonce = _nonces[tokenID]++; // get then increment bytes32 digest = keccak256( abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR(), keccak256(abi.encode(_PERMIT_TYPEHASH, spender, tokenID, nonce, deadline)) ) ); address owner = ownerOf(tokenID); require(spender != owner, "cannot permit to self"); if (Address.isContract(owner)) { require(IERC1271(owner).isValidSignature(digest, abi.encodePacked(r, s, v)) == 0x1626ba7e, "unauthorized"); } else { address recoveredAddress = ecrecover(digest, v, r, s); require(recoveredAddress != address(0), "invalid signature"); require(recoveredAddress == owner, "unauthorized"); } _approve(spender, tokenID); } /** * @notice Returns the current nonce for `tokenID`. This value must be * included whenever a signature is generated for `permit`. * Every successful call to `permit` increases ``tokenID``'s nonce by one. This * prevents a signature from being used multiple times. * @param tokenID ID of the token to request nonce. * @return nonce Nonce of the token. */ function nonces(uint256 tokenID) external view override returns (uint256 nonce) { return _nonces[tokenID]; } /** * @notice The permit typehash used in the `permit` signature. * @return typehash The typehash for the `permit`. */ // solhint-disable-next-line func-name-mixedcase function PERMIT_TYPEHASH() external pure override returns (bytes32 typehash) { return _PERMIT_TYPEHASH; } /** * @notice The domain separator used in the encoding of the signature for `permit`, as defined by `EIP712`. * @return seperator The domain seperator for `permit`. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() public view override returns (bytes32 seperator) { return _domainSeparatorV4(); } /*************************************** CHANGEABLE URIS ***************************************/ /** * @notice Returns the Uniform Resource Identifier (URI) for `tokenID` token. */ function tokenURI(uint256 tokenID) public view virtual override tokenMustExist(tokenID) returns (string memory) { string memory baseURI_ = baseURI; return string(abi.encodePacked(baseURI_, tokenID.toString())); } /** * @notice Base URI for computing `tokenURI`. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenID`. Empty * by default, can be overriden in child contracts. */ function _baseURI() internal view virtual override returns (string memory baseURI_) { return baseURI; } /** * @notice Sets the base URI for computing `tokenURI`. * @dev Remember to add access control to inheriting contracts. * @param baseURI_ The new base URI. */ function _setBaseURI(string memory baseURI_) internal { baseURI = baseURI_; emit BaseURISet(baseURI_); } /*************************************** MODIFIERS ***************************************/ // Call will revert if the token does not exist. modifier tokenMustExist(uint256 tokenID) { require(_exists(tokenID), "query for nonexistent token"); _; } // Call will revert if not made by owner. // Call will revert if the token does not exist. modifier onlyOwner(uint256 tokenID) { require(ownerOf(tokenID) == msg.sender, "only owner"); _; } // Call will revert if not made by owner or approved. // Call will revert if the token does not exist. modifier onlyOwnerOrApproved(uint256 tokenID) { require(_isApprovedOrOwner(msg.sender, tokenID), "only owner or approved"); _; } /*************************************** MORE HOOKS ***************************************/ /** * @notice Mints `tokenID` and transfers it to `to`. * @param to The receiver of the token. * @param tokenID The ID of the token to mint. */ function _mint(address to, uint256 tokenID) internal virtual override { super._mint(to, tokenID); _afterTokenTransfer(address(0), to, tokenID); } /** * @notice Destroys `tokenID`. * @param tokenID The ID of the token to burn. */ function _burn(uint256 tokenID) internal virtual override { address owner = ERC721.ownerOf(tokenID); super._burn(tokenID); _afterTokenTransfer(owner, address(0), tokenID); } /** * @notice Transfers `tokenID` from `from` to `to`. * @param from The account to transfer the token from. * @param to The account to transfer the token to. * @param tokenID The ID of the token to transfer. */ function _transfer( address from, address to, uint256 tokenID ) internal virtual override { super._transfer(from, to, tokenID); _afterTokenTransfer(from, to, tokenID); } /** * @notice Hook that is called after any token transfer. This includes minting and burning. * @param from The user that sends the token, or zero if minting. * @param to The zero that receives the token, or zero if burning. * @param tokenID The ID of the token being transferred. */ function _afterTokenTransfer( address from, address to, uint256 tokenID // solhint-disable-next-line no-empty-blocks ) internal virtual {} /*************************************** MISC ***************************************/ /** * @notice Determines if a token exists or not. * @param tokenID The ID of the token to query. * @return status True if the token exists, false if it doesn't. */ function exists(uint256 tokenID) external view override returns (bool status) { return _exists(tokenID); } }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.6; import "./../interfaces/utils/IGovernable.sol"; /** * @title Governable * @author solace.fi * @notice Enforces access control for important functions to [**governor**](/docs/protocol/governance). * * Many contracts contain functionality that should only be accessible to a privileged user. The most common access control pattern is [OpenZeppelin's `Ownable`](https://docs.openzeppelin.com/contracts/4.x/access-control#ownership-and-ownable). We instead use `Governable` with a few key differences: * - Transferring the governance role is a two step process. The current governance must [`setPendingGovernance(pendingGovernance_)`](#setpendinggovernance) then the new governance must [`acceptGovernance()`](#acceptgovernance). This is to safeguard against accidentally setting ownership to the wrong address and locking yourself out of your contract. * - `governance` is a constructor argument instead of `msg.sender`. This is especially useful when deploying contracts via a [`SingletonFactory`](./../interfaces/utils/ISingletonFactory). * - We use `lockGovernance()` instead of `renounceOwnership()`. `renounceOwnership()` is a prerequisite for the reinitialization bug because it sets `owner = address(0x0)`. We also use the `governanceIsLocked()` flag. */ contract Governable is IGovernable { /*************************************** GLOBAL VARIABLES ***************************************/ // Governor. address private _governance; // governance to take over. address private _pendingGovernance; bool private _locked; /** * @notice Constructs the governable contract. * @param governance_ The address of the [governor](/docs/protocol/governance). */ constructor(address governance_) { require(governance_ != address(0x0), "zero address governance"); _governance = governance_; _pendingGovernance = address(0x0); _locked = false; } /*************************************** MODIFIERS ***************************************/ // can only be called by governor // can only be called while unlocked modifier onlyGovernance() { require(!_locked, "governance locked"); require(msg.sender == _governance, "!governance"); _; } // can only be called by pending governor // can only be called while unlocked modifier onlyPendingGovernance() { require(!_locked, "governance locked"); require(msg.sender == _pendingGovernance, "!pending governance"); _; } /*************************************** VIEW FUNCTIONS ***************************************/ /// @notice Address of the current governor. function governance() external view override returns (address) { return _governance; } /// @notice Address of the governor to take over. function pendingGovernance() external view override returns (address) { return _pendingGovernance; } /// @notice Returns true if governance is locked. function governanceIsLocked() external view override returns (bool) { return _locked; } /*************************************** MUTATOR FUNCTIONS ***************************************/ /** * @notice Initiates transfer of the governance role to a new governor. * Transfer is not complete until the new governor accepts the role. * Can only be called by the current [**governor**](/docs/protocol/governance). * @param pendingGovernance_ The new governor. */ function setPendingGovernance(address pendingGovernance_) external override onlyGovernance { _pendingGovernance = pendingGovernance_; emit GovernancePending(pendingGovernance_); } /** * @notice Accepts the governance role. * Can only be called by the pending governor. */ function acceptGovernance() external override onlyPendingGovernance { // sanity check against transferring governance to the zero address // if someone figures out how to sign transactions from the zero address // consider the entirety of ethereum to be rekt require(_pendingGovernance != address(0x0), "zero governance"); address oldGovernance = _governance; _governance = _pendingGovernance; _pendingGovernance = address(0x0); emit GovernanceTransferred(oldGovernance, _governance); } /** * @notice Permanently locks this contract's governance role and any of its functions that require the role. * This action cannot be reversed. * Before you call it, ask yourself: * - Is the contract self-sustaining? * - Is there a chance you will need governance privileges in the future? * Can only be called by the current [**governor**](/docs/protocol/governance). */ function lockGovernance() external override onlyGovernance { _locked = true; // intentionally not using address(0x0), see re-initialization exploit _governance = address(0xFFfFfFffFFfffFFfFFfFFFFFffFFFffffFfFFFfF); _pendingGovernance = address(0xFFfFfFffFFfffFFfFFfFFFFFffFFFffffFfFFFfF); emit GovernanceTransferred(msg.sender, address(0xFFfFfFffFFfffFFfFFfFFFFFffFFFffffFfFFFfF)); emit GovernanceLocked(); } }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.6; import "./IxsLocker.sol"; /** * @title IxsListener * @author solace.fi * @notice A standard interface for notifying a contract about an action in another contract. */ interface IxsListener { /** * @notice Called when an action is performed on a lock. * @dev Called on transfer, mint, burn, and update. * Either the owner will change or the lock will change, not both. * @param xsLockID The ID of the lock that was altered. * @param oldOwner The old owner of the lock. * @param newOwner The new owner of the lock. * @param oldLock The old lock data. * @param newLock The new lock data. */ function registerLockEvent(uint256 xsLockID, address oldOwner, address newOwner, Lock memory oldLock, Lock memory newLock) external; }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.6; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol"; import "@openzeppelin/contracts/utils/structs/EnumerableMap.sol"; import "./../utils/IERC721Enhanced.sol"; struct Lock { uint256 amount; uint256 end; } /** * @title IxsLocker * @author solace.fi * @notice Stake your [**SOLACE**](./../../SOLACE) to receive voting rights, [**SOLACE**](./../../SOLACE) rewards, and more. * * Locks are ERC721s and can be viewed with [`locks()`](#locks). Each lock has an `amount` of [**SOLACE**](./../../SOLACE) and an `end` timestamp and cannot be transferred or withdrawn from before it unlocks. Locks have a maximum duration of four years. * * Users can create locks via [`createLock()`](#createlock) or [`createLockSigned()`](#createlocksigned), deposit more [**SOLACE**](./../../SOLACE) into a lock via [`increaseAmount()`](#increaseamount) or [`increaseAmountSigned()`](#increaseamountsigned), extend a lock via [`extendLock()`](#extendlock), and withdraw via [`withdraw()`](#withdraw), [`withdrawInPart()`](#withdrawinpart), or [`withdrawMany()`](#withdrawmany). * * Users and contracts (eg BondTellers) may deposit on behalf of another user or contract. * * Any time a lock is updated it will notify the listener contracts (eg StakingRewards). * * Note that transferring [**SOLACE**](./../../SOLACE) to this contract will not give you any rewards. You should deposit your [**SOLACE**](./../../SOLACE) via [`createLock()`](#createlock) or [`createLockSigned()`](#createlocksigned). */ interface IxsLocker is IERC721Enhanced { /*************************************** EVENTS ***************************************/ /// @notice Emitted when a lock is created. event LockCreated(uint256 xsLockID); /// @notice Emitted when a lock is updated. event LockUpdated(uint256 xsLockID, uint256 amount, uint256 end); /// @notice Emitted when a lock is withdrawn from. event Withdrawl(uint256 xsLockID, uint256 amount); /// @notice Emitted when a listener is added. event xsLockListenerAdded(address listener); /// @notice Emitted when a listener is removed. event xsLockListenerRemoved(address listener); /*************************************** GLOBAL VARIABLES ***************************************/ /// @notice [**SOLACE**](./../../SOLACE) token. function solace() external view returns (address); /// @notice The maximum time into the future that a lock can expire. function MAX_LOCK_DURATION() external view returns (uint256); /// @notice The total number of locks that have been created. function totalNumLocks() external view returns (uint256); /*************************************** VIEW FUNCTIONS ***************************************/ /** * @notice Information about a lock. * @param xsLockID The ID of the lock to query. * @return lock_ Information about the lock. */ function locks(uint256 xsLockID) external view returns (Lock memory lock_); /** * @notice Determines if the lock is locked. * @param xsLockID The ID of the lock to query. * @return locked True if the lock is locked, false if unlocked. */ function isLocked(uint256 xsLockID) external view returns (bool locked); /** * @notice Determines the time left until the lock unlocks. * @param xsLockID The ID of the lock to query. * @return time The time left in seconds, 0 if unlocked. */ function timeLeft(uint256 xsLockID) external view returns (uint256 time); /** * @notice Returns the amount of [**SOLACE**](./../../SOLACE) the user has staked. * @param account The account to query. * @return balance The user's balance. */ function stakedBalance(address account) external view returns (uint256 balance); /** * @notice The list of contracts that are listening to lock updates. * @return listeners_ The list as an array. */ function getXsLockListeners() external view returns (address[] memory listeners_); /*************************************** MUTATOR FUNCTIONS ***************************************/ /** * @notice Deposit [**SOLACE**](./../../SOLACE) to create a new lock. * @dev [**SOLACE**](./../../SOLACE) is transferred from msg.sender, assumes its already approved. * @dev use end=0 to initialize as unlocked. * @param recipient The account that will receive the lock. * @param amount The amount of [**SOLACE**](./../../SOLACE) to deposit. * @param end The timestamp the lock will unlock. * @return xsLockID The ID of the newly created lock. */ function createLock(address recipient, uint256 amount, uint256 end) external returns (uint256 xsLockID); /** * @notice Deposit [**SOLACE**](./../../SOLACE) to create a new lock. * @dev [**SOLACE**](./../../SOLACE) is transferred from msg.sender using ERC20Permit. * @dev use end=0 to initialize as unlocked. * @dev recipient = msg.sender * @param amount The amount of [**SOLACE**](./../../SOLACE) to deposit. * @param end The timestamp the lock will unlock. * @param deadline Time the transaction must go through before. * @param v secp256k1 signature * @param r secp256k1 signature * @param s secp256k1 signature * @return xsLockID The ID of the newly created lock. */ function createLockSigned(uint256 amount, uint256 end, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external returns (uint256 xsLockID); /** * @notice Deposit [**SOLACE**](./../../SOLACE) to increase the value of an existing lock. * @dev [**SOLACE**](./../../SOLACE) is transferred from msg.sender, assumes its already approved. * @param xsLockID The ID of the lock to update. * @param amount The amount of [**SOLACE**](./../../SOLACE) to deposit. */ function increaseAmount(uint256 xsLockID, uint256 amount) external; /** * @notice Deposit [**SOLACE**](./../../SOLACE) to increase the value of an existing lock. * @dev [**SOLACE**](./../../SOLACE) is transferred from msg.sender using ERC20Permit. * @param xsLockID The ID of the lock to update. * @param amount The amount of [**SOLACE**](./../../SOLACE) to deposit. * @param deadline Time the transaction must go through before. * @param v secp256k1 signature * @param r secp256k1 signature * @param s secp256k1 signature */ function increaseAmountSigned(uint256 xsLockID, uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external; /** * @notice Extend a lock's duration. * @dev Can only be called by the lock owner or approved. * @param xsLockID The ID of the lock to update. * @param end The new time for the lock to unlock. */ function extendLock(uint256 xsLockID, uint256 end) external; /** * @notice Withdraw from a lock in full. * @dev Can only be called by the lock owner or approved. * @dev Can only be called if unlocked. * @param xsLockID The ID of the lock to withdraw from. * @param recipient The user to receive the lock's [**SOLACE**](./../../SOLACE). */ function withdraw(uint256 xsLockID, address recipient) external; /** * @notice Withdraw from a lock in part. * @dev Can only be called by the lock owner or approved. * @dev Can only be called if unlocked. * @param xsLockID The ID of the lock to withdraw from. * @param recipient The user to receive the lock's [**SOLACE**](./../../SOLACE). * @param amount The amount of [**SOLACE**](./../../SOLACE) to withdraw. */ function withdrawInPart(uint256 xsLockID, address recipient, uint256 amount) external; /** * @notice Withdraw from multiple locks in full. * @dev Can only be called by the lock owner or approved. * @dev Can only be called if unlocked. * @param xsLockIDs The ID of the locks to withdraw from. * @param recipient The user to receive the lock's [**SOLACE**](./../../SOLACE). */ function withdrawMany(uint256[] calldata xsLockIDs, address recipient) external; /*************************************** GOVERNANCE FUNCTIONS ***************************************/ /** * @notice Adds a listener. * Can only be called by the current [**governor**](/docs/protocol/governance). * @param listener The listener to add. */ function addXsLockListener(address listener) external; /** * @notice Removes a listener. * Can only be called by the current [**governor**](/docs/protocol/governance). * @param listener The listener to remove. */ function removeXsLockListener(address listener) external; /** * @notice Sets the base URI for computing `tokenURI`. * Can only be called by the current [**governor**](/docs/protocol/governance). * @param baseURI_ The new base URI. */ function setBaseURI(string memory baseURI_) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @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 * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; assembly { size := extcodesize(account) } return size > 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://diligence.consensys.net/posts/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/v0.5.11/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 functionCall(target, data, "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"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(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) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(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) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason 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 { // 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 assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. */ interface IERC20Permit { /** * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, * given ``owner``'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./IERC20.sol"; import "./extensions/IERC20Metadata.sol"; import "../../utils/Context.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20, IERC20Metadata { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * Requirements: * * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom( address sender, address recipient, uint256 amount ) public virtual override returns (bool) { _transfer(sender, recipient, amount); uint256 currentAllowance = _allowances[sender][_msgSender()]; require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance"); unchecked { _approve(sender, _msgSender(), currentAllowance - amount); } return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { uint256 currentAllowance = _allowances[_msgSender()][spender]; require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(_msgSender(), spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `sender` to `recipient`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer( address sender, address recipient, uint256 amount ) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); uint256 senderBalance = _balances[sender]; require(senderBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[sender] = senderBalance - amount; } _balances[recipient] += amount; emit Transfer(sender, recipient, amount); _afterTokenTransfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; _balances[account] += amount; emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; } _totalSupply -= amount; emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @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 } 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"); } else if (error == RecoverError.InvalidSignatureV) { revert("ECDSA: invalid signature 'v' 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) { // Check the signature length // - case 65: r,s,v signature (standard) // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._ 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. 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 if (signature.length == 64) { bytes32 r; bytes32 vs; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. assembly { r := mload(add(signature, 0x20)) vs := mload(add(signature, 0x40)) } return tryRecover(hash, r, vs); } 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; uint8 v; assembly { s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) v := add(shr(255, vs), 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 (v != 27 && v != 28) { return (address(0), RecoverError.InvalidSignatureV); } // 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) { // 32 is the length in bytes of hash, // enforced by the type signature above return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)); } /** * @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) { return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash)); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @title Counters * @author Matt Condon (@shrugs) * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number * of elements in a mapping, issuing ERC721 ids, or counting request ids. * * Include with `using Counters for Counters.Counter;` */ library Counters { struct Counter { // This variable should never be directly accessed by users of the library: interactions must be restricted to // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add // this feature: see https://github.com/ethereum/solidity/issues/4637 uint256 _value; // default: 0 } function current(Counter storage counter) internal view returns (uint256) { return counter._value; } function increment(Counter storage counter) internal { unchecked { counter._value += 1; } } function decrement(Counter storage counter) internal { uint256 value = counter._value; require(value > 0, "Counter: decrement overflow"); unchecked { counter._value = value - 1; } } function reset(Counter storage counter) internal { counter._value = 0; } }
// SPDX-License-Identifier: MIT 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 pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../ERC721.sol"; import "./IERC721Enumerable.sol"; /** * @dev This implements an optional extension of {ERC721} defined in the EIP that adds * enumerability of all the token ids in the contract as well as all token ids owned by each * account. */ abstract contract ERC721Enumerable is ERC721, IERC721Enumerable { // Mapping from owner to list of owned token IDs mapping(address => mapping(uint256 => uint256)) private _ownedTokens; // Mapping from token ID to index of the owner tokens list mapping(uint256 => uint256) private _ownedTokensIndex; // Array with all token ids, used for enumeration uint256[] private _allTokens; // Mapping from token id to position in the allTokens array mapping(uint256 => uint256) private _allTokensIndex; /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) { return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}. */ function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) { require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds"); return _ownedTokens[owner][index]; } /** * @dev See {IERC721Enumerable-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _allTokens.length; } /** * @dev See {IERC721Enumerable-tokenByIndex}. */ function tokenByIndex(uint256 index) public view virtual override returns (uint256) { require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds"); return _allTokens[index]; } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` cannot be the zero address. * - `to` cannot be the zero address. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual override { super._beforeTokenTransfer(from, to, tokenId); if (from == address(0)) { _addTokenToAllTokensEnumeration(tokenId); } else if (from != to) { _removeTokenFromOwnerEnumeration(from, tokenId); } if (to == address(0)) { _removeTokenFromAllTokensEnumeration(tokenId); } else if (to != from) { _addTokenToOwnerEnumeration(to, tokenId); } } /** * @dev Private function to add a token to this extension's ownership-tracking data structures. * @param to address representing the new owner of the given token ID * @param tokenId uint256 ID of the token to be added to the tokens list of the given address */ function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private { uint256 length = ERC721.balanceOf(to); _ownedTokens[to][length] = tokenId; _ownedTokensIndex[tokenId] = length; } /** * @dev Private function to add a token to this extension's token tracking data structures. * @param tokenId uint256 ID of the token to be added to the tokens list */ function _addTokenToAllTokensEnumeration(uint256 tokenId) private { _allTokensIndex[tokenId] = _allTokens.length; _allTokens.push(tokenId); } /** * @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that * while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for * gas optimizations e.g. when performing a transfer operation (avoiding double writes). * This has O(1) time complexity, but alters the order of the _ownedTokens array. * @param from address representing the previous owner of the given token ID * @param tokenId uint256 ID of the token to be removed from the tokens list of the given address */ function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private { // To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and // then delete the last slot (swap and pop). uint256 lastTokenIndex = ERC721.balanceOf(from) - 1; uint256 tokenIndex = _ownedTokensIndex[tokenId]; // When the token to delete is the last token, the swap operation is unnecessary if (tokenIndex != lastTokenIndex) { uint256 lastTokenId = _ownedTokens[from][lastTokenIndex]; _ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token _ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index } // This also deletes the contents at the last position of the array delete _ownedTokensIndex[tokenId]; delete _ownedTokens[from][lastTokenIndex]; } /** * @dev Private function to remove a token from this extension's token tracking data structures. * This has O(1) time complexity, but alters the order of the _allTokens array. * @param tokenId uint256 ID of the token to be removed from the tokens list */ function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private { // To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and // then delete the last slot (swap and pop). uint256 lastTokenIndex = _allTokens.length - 1; uint256 tokenIndex = _allTokensIndex[tokenId]; // When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so // rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding // an 'if' statement (like in _removeTokenFromOwnerEnumeration) uint256 lastTokenId = _allTokens[lastTokenIndex]; _allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token _allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index // This also deletes the contents at the last position of the array delete _allTokensIndex[tokenId]; _allTokens.pop(); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @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] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } }
// SPDX-License-Identifier: GPL-3.0-or-later // code borrowed from @uniswap/v3-periphery pragma solidity 0.8.6; /// @title Interface for verifying contract-based account signatures /// @notice Interface that verifies provided signature for the data /// @dev Interface defined by EIP-1271 interface IERC1271 { /// @notice Returns whether the provided signature is valid for the provided data /// @dev MUST return the bytes4 magic value 0x1626ba7e when function passes. /// MUST NOT modify state (using STATICCALL for solc < 0.5, view modifier for solc > 0.5). /// MUST allow external calls. /// @param hash Hash of the data to be signed /// @param signature Signature byte array associated with _data /// @return magicValue The bytes4 magic value 0x1626ba7e function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue); }
// SPDX-License-Identifier: GPL-3.0-or-later // code borrowed from OpenZeppelin and @uniswap/v3-periphery pragma solidity 0.8.6; import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol"; /** * @title ERC721Enhancedv1 * @author solace.fi * @notice An extension of `ERC721`. * * The base is OpenZeppelin's `ERC721Enumerable` which also includes the `Metadata` extension. This extension includes simpler transfers, gasless approvals, and changeable URIs. */ interface IERC721Enhanced is IERC721Enumerable { /*************************************** SIMPLER TRANSFERS ***************************************/ /** * @notice Transfers `tokenID` from `msg.sender` to `to`. * @dev This was excluded from the official `ERC721` standard in favor of `transferFrom(address from, address to, uint256 tokenID)`. We elect to include it. * @param to The receipient of the token. * @param tokenID The token to transfer. */ function transfer(address to, uint256 tokenID) external; /** * @notice Safely transfers `tokenID` from `msg.sender` to `to`. * @dev This was excluded from the official `ERC721` standard in favor of `safeTransferFrom(address from, address to, uint256 tokenID)`. We elect to include it. * @param to The receipient of the token. * @param tokenID The token to transfer. */ function safeTransfer(address to, uint256 tokenID) external; /*************************************** GASLESS APPROVALS ***************************************/ /** * @notice Approve of a specific `tokenID` for spending by `spender` via signature. * @param spender The account that is being approved. * @param tokenID The ID of the token that is being approved for spending. * @param deadline The deadline timestamp by which the call must be mined for the approve to work. * @param v Must produce valid secp256k1 signature from the holder along with `r` and `s`. * @param r Must produce valid secp256k1 signature from the holder along with `v` and `s`. * @param s Must produce valid secp256k1 signature from the holder along with `r` and `v`. */ function permit( address spender, uint256 tokenID, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @notice Returns the current nonce for `tokenID`. This value must be * included whenever a signature is generated for `permit`. * Every successful call to `permit` increases ``tokenID``'s nonce by one. This * prevents a signature from being used multiple times. * @param tokenID ID of the token to request nonce. * @return nonce Nonce of the token. */ function nonces(uint256 tokenID) external view returns (uint256 nonce); /** * @notice The permit typehash used in the `permit` signature. * @return typehash The typehash for the `permit`. */ // solhint-disable-next-line func-name-mixedcase function PERMIT_TYPEHASH() external view returns (bytes32 typehash); /** * @notice The domain separator used in the encoding of the signature for `permit`, as defined by `EIP712`. * @return seperator The domain seperator for `permit`. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32 seperator); /*************************************** CHANGEABLE URIS ***************************************/ /// @notice Emitted when the base URI is set. event BaseURISet(string baseURI); /*************************************** MISC ***************************************/ /** * @notice Determines if a token exists or not. * @param tokenID The ID of the token to query. * @return status True if the token exists, false if it doesn't. */ function exists(uint256 tokenID) external view returns (bool status); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./IERC721.sol"; import "./IERC721Receiver.sol"; import "./extensions/IERC721Metadata.sol"; import "../../utils/Address.sol"; import "../../utils/Context.sol"; import "../../utils/Strings.sol"; import "../../utils/introspection/ERC165.sol"; /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata extension, but not including the Enumerable extension, which is available separately as * {ERC721Enumerable}. */ contract ERC721 is Context, ERC165, IERC721, IERC721Metadata { using Address for address; using Strings for uint256; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to owner address mapping(uint256 => address) private _owners; // Mapping owner address to token count mapping(address => uint256) private _balances; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; /** * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view virtual override returns (uint256) { require(owner != address(0), "ERC721: balance query for the zero address"); return _balances[owner]; } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view virtual override returns (address) { address owner = _owners[tokenId]; require(owner != address(0), "ERC721: owner query for nonexistent token"); return owner; } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); string memory baseURI = _baseURI(); return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ""; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overriden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ""; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public virtual override { address owner = ERC721.ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require( _msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not owner nor approved for all" ); _approve(to, tokenId); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual override returns (address) { require(_exists(tokenId), "ERC721: approved query for nonexistent token"); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { require(operator != _msgSender(), "ERC721: approve to caller"); _operatorApprovals[_msgSender()][operator] = approved; emit ApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { //solhint-disable-next-line max-line-length require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public virtual override { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public virtual override { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _safeTransfer(from, to, tokenId, _data); } /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * `_data` is additional data, it has no specified format and it is sent in call to `to`. * * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g. * implement alternative mechanisms to perform token transfer, such as signature-based. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeTransfer( address from, address to, uint256 tokenId, bytes memory _data ) internal virtual { _transfer(from, to, tokenId); require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), * and stop existing when they are burned (`_burn`). */ function _exists(uint256 tokenId) internal view virtual returns (bool) { return _owners[tokenId] != address(0); } /** * @dev Returns whether `spender` is allowed to manage `tokenId`. * * Requirements: * * - `tokenId` must exist. */ function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) { require(_exists(tokenId), "ERC721: operator query for nonexistent token"); address owner = ERC721.ownerOf(tokenId); return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender)); } /** * @dev Safely mints `tokenId` and transfers it to `to`. * * Requirements: * * - `tokenId` must not exist. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeMint(address to, uint256 tokenId) internal virtual { _safeMint(to, tokenId, ""); } /** * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is * forwarded in {IERC721Receiver-onERC721Received} to contract recipients. */ function _safeMint( address to, uint256 tokenId, bytes memory _data ) internal virtual { _mint(to, tokenId); require( _checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer" ); } /** * @dev Mints `tokenId` and transfers it to `to`. * * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible * * Requirements: * * - `tokenId` must not exist. * - `to` cannot be the zero address. * * Emits a {Transfer} event. */ function _mint(address to, uint256 tokenId) internal virtual { require(to != address(0), "ERC721: mint to the zero address"); require(!_exists(tokenId), "ERC721: token already minted"); _beforeTokenTransfer(address(0), to, tokenId); _balances[to] += 1; _owners[tokenId] = to; emit Transfer(address(0), to, tokenId); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal virtual { address owner = ERC721.ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId); // Clear approvals _approve(address(0), tokenId); _balances[owner] -= 1; delete _owners[tokenId]; emit Transfer(owner, address(0), tokenId); } /** * @dev Transfers `tokenId` from `from` to `to`. * As opposed to {transferFrom}, this imposes no restrictions on msg.sender. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer( address from, address to, uint256 tokenId ) internal virtual { require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own"); require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId); // Clear approvals from the previous owner _approve(address(0), tokenId); _balances[from] -= 1; _balances[to] += 1; _owners[tokenId] = to; emit Transfer(from, to, tokenId); } /** * @dev Approve `to` to operate on `tokenId` * * Emits a {Approval} event. */ function _approve(address to, uint256 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(ERC721.ownerOf(tokenId), to, tokenId); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { if (to.isContract()) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) { return retval == IERC721Receiver.onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert("ERC721: transfer to non ERC721Receiver implementer"); } else { assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Enumerable is IERC721 { /** * @dev Returns the total amount of tokens stored by the contract. */ function totalSupply() external view returns (uint256); /** * @dev Returns a token ID owned by `owner` at a given `index` of its token list. * Use along with {balanceOf} to enumerate all of ``owner``'s tokens. */ function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId); /** * @dev Returns a token ID at a given `index` of all the tokens stored by the contract. * Use along with {totalSupply} to enumerate all tokens. */ function tokenByIndex(uint256 index) external view returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.6; /** * @title IGovernable * @author solace.fi * @notice Enforces access control for important functions to [**governor**](/docs/protocol/governance). * * Many contracts contain functionality that should only be accessible to a privileged user. The most common access control pattern is [OpenZeppelin's `Ownable`](https://docs.openzeppelin.com/contracts/4.x/access-control#ownership-and-ownable). We instead use `Governable` with a few key differences: * - Transferring the governance role is a two step process. The current governance must [`setPendingGovernance(pendingGovernance_)`](#setpendinggovernance) then the new governance must [`acceptGovernance()`](#acceptgovernance). This is to safeguard against accidentally setting ownership to the wrong address and locking yourself out of your contract. * - `governance` is a constructor argument instead of `msg.sender`. This is especially useful when deploying contracts via a [`SingletonFactory`](./ISingletonFactory). * - We use `lockGovernance()` instead of `renounceOwnership()`. `renounceOwnership()` is a prerequisite for the reinitialization bug because it sets `owner = address(0x0)`. We also use the `governanceIsLocked()` flag. */ interface IGovernable { /*************************************** EVENTS ***************************************/ /// @notice Emitted when pending Governance is set. event GovernancePending(address pendingGovernance); /// @notice Emitted when Governance is set. event GovernanceTransferred(address oldGovernance, address newGovernance); /// @notice Emitted when Governance is locked. event GovernanceLocked(); /*************************************** VIEW FUNCTIONS ***************************************/ /// @notice Address of the current governor. function governance() external view returns (address); /// @notice Address of the governor to take over. function pendingGovernance() external view returns (address); /// @notice Returns true if governance is locked. function governanceIsLocked() external view returns (bool); /*************************************** MUTATORS ***************************************/ /** * @notice Initiates transfer of the governance role to a new governor. * Transfer is not complete until the new governor accepts the role. * Can only be called by the current [**governor**](/docs/protocol/governance). * @param pendingGovernance_ The new governor. */ function setPendingGovernance(address pendingGovernance_) external; /** * @notice Accepts the governance role. * Can only be called by the new governor. */ function acceptGovernance() external; /** * @notice Permanently locks this contract's governance role and any of its functions that require the role. * This action cannot be reversed. * Before you call it, ask yourself: * - Is the contract self-sustaining? * - Is there a chance you will need governance privileges in the future? * Can only be called by the current [**governor**](/docs/protocol/governance). */ function lockGovernance() external; }
{ "optimizer": { "enabled": true, "runs": 800 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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[{"inputs":[{"internalType":"address","name":"governance_","type":"address"},{"internalType":"address","name":"solace_","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"baseURI","type":"string"}],"name":"BaseURISet","type":"event"},{"anonymous":false,"inputs":[],"name":"GovernanceLocked","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"pendingGovernance","type":"address"}],"name":"GovernancePending","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"oldGovernance","type":"address"},{"indexed":false,"internalType":"address","name":"newGovernance","type":"address"}],"name":"GovernanceTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"xsLockID","type":"uint256"}],"name":"LockCreated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"xsLockID","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"end","type":"uint256"}],"name":"LockUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"xsLockID","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Withdrawl","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"listener","type":"address"}],"name":"xsLockListenerAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"listener","type":"address"}],"name":"xsLockListenerRemoved","type":"event"},{"inputs":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"seperator","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MAX_LOCK_DURATION","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PERMIT_TYPEHASH","outputs":[{"internalType":"bytes32","name":"typehash","type":"bytes32"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"acceptGovernance","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"listener","type":"address"}],"name":"addXsLockListener","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"baseURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"end","type":"uint256"}],"name":"createLock","outputs":[{"internalType":"uint256","name":"xsLockID","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"end","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"createLockSigned","outputs":[{"internalType":"uint256","name":"xsLockID","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenID","type":"uint256"}],"name":"exists","outputs":[{"internalType":"bool","name":"status","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"xsLockID","type":"uint256"},{"internalType":"uint256","name":"end","type":"uint256"}],"name":"extendLock","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getXsLockListeners","outputs":[{"internalType":"address[]","name":"listeners_","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"governance","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"governanceIsLocked","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"xsLockID","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"increaseAmount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"xsLockID","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"increaseAmountSigned","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"xsLockID","type":"uint256"}],"name":"isLocked","outputs":[{"internalType":"bool","name":"locked","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lockGovernance","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"xsLockID","type":"uint256"}],"name":"locks","outputs":[{"components":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"end","type":"uint256"}],"internalType":"struct Lock","name":"lock_","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenID","type":"uint256"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"nonce","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingGovernance","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"tokenID","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"listener","type":"address"}],"name":"removeXsLockListener","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenID","type":"uint256"}],"name":"safeTransfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"baseURI_","type":"string"}],"name":"setBaseURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"pendingGovernance_","type":"address"}],"name":"setPendingGovernance","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"solace","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"stakedBalance","outputs":[{"internalType":"uint256","name":"balance","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"xsLockID","type":"uint256"}],"name":"timeLeft","outputs":[{"internalType":"uint256","name":"time","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenOfOwnerByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenID","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalNumLocks","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenID","type":"uint256"}],"name":"transfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint2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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000501ace0e8d16b92236763e2ded7ae3bc2dffa276000000000000000000000000501ace9c35e60f03a2af4d484f49f9b1efde9f40
-----Decoded View---------------
Arg [0] : governance_ (address): 0x501AcE0e8D16B92236763E2dEd7aE3bc2DFfA276
Arg [1] : solace_ (address): 0x501acE9c35E60f03A2af4d484f49F9B1EFde9f40
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000501ace0e8d16b92236763e2ded7ae3bc2dffa276
Arg [1] : 000000000000000000000000501ace9c35e60f03a2af4d484f49f9b1efde9f40
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