Contract Name:
GraphTokenLockManager
Contract Source Code:
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.3;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/EnumerableSet.sol";
import "./MinimalProxyFactory.sol";
import "./IGraphTokenLockManager.sol";
/**
* @title GraphTokenLockManager
* @notice This contract manages a list of authorized function calls and targets that can be called
* by any TokenLockWallet contract and it is a factory of TokenLockWallet contracts.
*
* This contract receives funds to make the process of creating TokenLockWallet contracts
* easier by distributing them the initial tokens to be managed.
*
* The owner can setup a list of token destinations that will be used by TokenLock contracts to
* approve the pulling of funds, this way in can be guaranteed that only protocol contracts
* will manipulate users funds.
*/
contract GraphTokenLockManager is MinimalProxyFactory, IGraphTokenLockManager {
using SafeERC20 for IERC20;
using EnumerableSet for EnumerableSet.AddressSet;
// -- State --
mapping(bytes4 => address) public authFnCalls;
EnumerableSet.AddressSet private _tokenDestinations;
address public masterCopy;
IERC20 private _token;
// -- Events --
event MasterCopyUpdated(address indexed masterCopy);
event TokenLockCreated(
address indexed contractAddress,
bytes32 indexed initHash,
address indexed beneficiary,
address token,
uint256 managedAmount,
uint256 startTime,
uint256 endTime,
uint256 periods,
uint256 releaseStartTime,
uint256 vestingCliffTime,
IGraphTokenLock.Revocability revocable
);
event TokensDeposited(address indexed sender, uint256 amount);
event TokensWithdrawn(address indexed sender, uint256 amount);
event FunctionCallAuth(address indexed caller, bytes4 indexed sigHash, address indexed target, string signature);
event TokenDestinationAllowed(address indexed dst, bool allowed);
/**
* Constructor.
* @param _graphToken Token to use for deposits and withdrawals
* @param _masterCopy Address of the master copy to use to clone proxies
*/
constructor(IERC20 _graphToken, address _masterCopy) {
require(address(_graphToken) != address(0), "Token cannot be zero");
_token = _graphToken;
setMasterCopy(_masterCopy);
}
// -- Factory --
/**
* @notice Sets the masterCopy bytecode to use to create clones of TokenLock contracts
* @param _masterCopy Address of contract bytecode to factory clone
*/
function setMasterCopy(address _masterCopy) public override onlyOwner {
require(_masterCopy != address(0), "MasterCopy cannot be zero");
masterCopy = _masterCopy;
emit MasterCopyUpdated(_masterCopy);
}
/**
* @notice Creates and fund a new token lock wallet using a minimum proxy
* @param _owner Address of the contract owner
* @param _beneficiary Address of the beneficiary of locked tokens
* @param _managedAmount Amount of tokens to be managed by the lock contract
* @param _startTime Start time of the release schedule
* @param _endTime End time of the release schedule
* @param _periods Number of periods between start time and end time
* @param _releaseStartTime Override time for when the releases start
* @param _revocable Whether the contract is revocable
*/
function createTokenLockWallet(
address _owner,
address _beneficiary,
uint256 _managedAmount,
uint256 _startTime,
uint256 _endTime,
uint256 _periods,
uint256 _releaseStartTime,
uint256 _vestingCliffTime,
IGraphTokenLock.Revocability _revocable
) external override onlyOwner {
require(_token.balanceOf(address(this)) >= _managedAmount, "Not enough tokens to create lock");
// Create contract using a minimal proxy and call initializer
bytes memory initializer = abi.encodeWithSignature(
"initialize(address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,uint8)",
address(this),
_owner,
_beneficiary,
address(_token),
_managedAmount,
_startTime,
_endTime,
_periods,
_releaseStartTime,
_vestingCliffTime,
_revocable
);
address contractAddress = _deployProxy2(keccak256(initializer), masterCopy, initializer);
// Send managed amount to the created contract
_token.safeTransfer(contractAddress, _managedAmount);
emit TokenLockCreated(
contractAddress,
keccak256(initializer),
_beneficiary,
address(_token),
_managedAmount,
_startTime,
_endTime,
_periods,
_releaseStartTime,
_vestingCliffTime,
_revocable
);
}
// -- Funds Management --
/**
* @notice Gets the GRT token address
* @return Token used for transfers and approvals
*/
function token() external view override returns (IERC20) {
return _token;
}
/**
* @notice Deposits tokens into the contract
* @dev Even if the ERC20 token can be transferred directly to the contract
* this function provide a safe interface to do the transfer and avoid mistakes
* @param _amount Amount to deposit
*/
function deposit(uint256 _amount) external override {
require(_amount > 0, "Amount cannot be zero");
_token.safeTransferFrom(msg.sender, address(this), _amount);
emit TokensDeposited(msg.sender, _amount);
}
/**
* @notice Withdraws tokens from the contract
* @dev Escape hatch in case of mistakes or to recover remaining funds
* @param _amount Amount of tokens to withdraw
*/
function withdraw(uint256 _amount) external override onlyOwner {
require(_amount > 0, "Amount cannot be zero");
_token.safeTransfer(msg.sender, _amount);
emit TokensWithdrawn(msg.sender, _amount);
}
// -- Token Destinations --
/**
* @notice Adds an address that can be allowed by a token lock to pull funds
* @param _dst Destination address
*/
function addTokenDestination(address _dst) external override onlyOwner {
require(_dst != address(0), "Destination cannot be zero");
require(_tokenDestinations.add(_dst), "Destination already added");
emit TokenDestinationAllowed(_dst, true);
}
/**
* @notice Removes an address that can be allowed by a token lock to pull funds
* @param _dst Destination address
*/
function removeTokenDestination(address _dst) external override onlyOwner {
require(_tokenDestinations.remove(_dst), "Destination already removed");
emit TokenDestinationAllowed(_dst, false);
}
/**
* @notice Returns True if the address is authorized to be a destination of tokens
* @param _dst Destination address
* @return True if authorized
*/
function isTokenDestination(address _dst) external view override returns (bool) {
return _tokenDestinations.contains(_dst);
}
/**
* @notice Returns an array of authorized destination addresses
* @return Array of addresses authorized to pull funds from a token lock
*/
function getTokenDestinations() external view override returns (address[] memory) {
address[] memory dstList = new address[](_tokenDestinations.length());
for (uint256 i = 0; i < _tokenDestinations.length(); i++) {
dstList[i] = _tokenDestinations.at(i);
}
return dstList;
}
// -- Function Call Authorization --
/**
* @notice Sets an authorized function call to target
* @dev Input expected is the function signature as 'transfer(address,uint256)'
* @param _signature Function signature
* @param _target Address of the destination contract to call
*/
function setAuthFunctionCall(string calldata _signature, address _target) external override onlyOwner {
_setAuthFunctionCall(_signature, _target);
}
/**
* @notice Unsets an authorized function call to target
* @dev Input expected is the function signature as 'transfer(address,uint256)'
* @param _signature Function signature
*/
function unsetAuthFunctionCall(string calldata _signature) external override onlyOwner {
bytes4 sigHash = _toFunctionSigHash(_signature);
authFnCalls[sigHash] = address(0);
emit FunctionCallAuth(msg.sender, sigHash, address(0), _signature);
}
/**
* @notice Sets an authorized function call to target in bulk
* @dev Input expected is the function signature as 'transfer(address,uint256)'
* @param _signatures Function signatures
* @param _targets Address of the destination contract to call
*/
function setAuthFunctionCallMany(string[] calldata _signatures, address[] calldata _targets)
external
override
onlyOwner
{
require(_signatures.length == _targets.length, "Array length mismatch");
for (uint256 i = 0; i < _signatures.length; i++) {
_setAuthFunctionCall(_signatures[i], _targets[i]);
}
}
/**
* @notice Sets an authorized function call to target
* @dev Input expected is the function signature as 'transfer(address,uint256)'
* @dev Function signatures of Graph Protocol contracts to be used are known ahead of time
* @param _signature Function signature
* @param _target Address of the destination contract to call
*/
function _setAuthFunctionCall(string calldata _signature, address _target) internal {
require(_target != address(this), "Target must be other contract");
require(Address.isContract(_target), "Target must be a contract");
bytes4 sigHash = _toFunctionSigHash(_signature);
authFnCalls[sigHash] = _target;
emit FunctionCallAuth(msg.sender, sigHash, _target, _signature);
}
/**
* @notice Gets the target contract to call for a particular function signature
* @param _sigHash Function signature hash
* @return Address of the target contract where to send the call
*/
function getAuthFunctionCallTarget(bytes4 _sigHash) public view override returns (address) {
return authFnCalls[_sigHash];
}
/**
* @notice Returns true if the function call is authorized
* @param _sigHash Function signature hash
* @return True if authorized
*/
function isAuthFunctionCall(bytes4 _sigHash) external view override returns (bool) {
return getAuthFunctionCallTarget(_sigHash) != address(0);
}
/**
* @dev Converts a function signature string to 4-bytes hash
* @param _signature Function signature string
* @return Function signature hash
*/
function _toFunctionSigHash(string calldata _signature) internal pure returns (bytes4) {
return _convertToBytes4(abi.encodeWithSignature(_signature));
}
/**
* @dev Converts function signature bytes to function signature hash (bytes4)
* @param _signature Function signature
* @return Function signature in bytes4
*/
function _convertToBytes4(bytes memory _signature) internal pure returns (bytes4) {
require(_signature.length == 4, "Invalid method signature");
bytes4 sigHash;
// solium-disable-next-line security/no-inline-assembly
assembly {
sigHash := mload(add(_signature, 32))
}
return sigHash;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <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 >=0.6.0 <0.8.0;
import "./IERC20.sol";
import "../../math/SafeMath.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 SafeMath for uint256;
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'
// solhint-disable-next-line max-line-length
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).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_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
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <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;
// solhint-disable-next-line no-inline-assembly
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");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(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");
// solhint-disable-next-line avoid-low-level-calls
(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");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private 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
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <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;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
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] = toDeleteIndex + 1; // All indexes are 1-based
// 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) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
// 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);
}
// 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(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(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(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(uint256(_at(set._inner, index)));
}
// 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));
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.3;
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Create2.sol";
// Adapted from https://github.com/OpenZeppelin/openzeppelin-sdk/blob/v2.5.0/packages/lib/contracts/upgradeability/ProxyFactory.sol
// Based on https://eips.ethereum.org/EIPS/eip-1167
contract MinimalProxyFactory is Ownable {
// -- Events --
event ProxyCreated(address indexed proxy);
/**
* @notice Gets the deterministic CREATE2 address for MinimalProxy with a particular implementation
* @param _salt Bytes32 salt to use for CREATE2
* @param _implementation Address of the proxy target implementation
* @return Address of the counterfactual MinimalProxy
*/
function getDeploymentAddress(bytes32 _salt, address _implementation) external view returns (address) {
return Create2.computeAddress(_salt, keccak256(_getContractCreationCode(_implementation)), address(this));
}
/**
* @notice Deploys a MinimalProxy with CREATE2
* @param _salt Bytes32 salt to use for CREATE2
* @param _implementation Address of the proxy target implementation
* @param _data Bytes with the initializer call
* @return Address of the deployed MinimalProxy
*/
function _deployProxy2(
bytes32 _salt,
address _implementation,
bytes memory _data
) internal returns (address) {
address proxyAddress = Create2.deploy(0, _salt, _getContractCreationCode(_implementation));
emit ProxyCreated(proxyAddress);
// Call function with data
if (_data.length > 0) {
Address.functionCall(proxyAddress, _data);
}
return proxyAddress;
}
/**
* @notice Gets the MinimalProxy bytecode
* @param _implementation Address of the proxy target implementation
* @return MinimalProxy bytecode
*/
function _getContractCreationCode(address _implementation) internal pure returns (bytes memory) {
bytes10 creation = 0x3d602d80600a3d3981f3;
bytes10 prefix = 0x363d3d373d3d3d363d73;
bytes20 targetBytes = bytes20(_implementation);
bytes15 suffix = 0x5af43d82803e903d91602b57fd5bf3;
return abi.encodePacked(creation, prefix, targetBytes, suffix);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.3;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "./IGraphTokenLock.sol";
interface IGraphTokenLockManager {
// -- Factory --
function setMasterCopy(address _masterCopy) external;
function createTokenLockWallet(
address _owner,
address _beneficiary,
uint256 _managedAmount,
uint256 _startTime,
uint256 _endTime,
uint256 _periods,
uint256 _releaseStartTime,
uint256 _vestingCliffTime,
IGraphTokenLock.Revocability _revocable
) external;
// -- Funds Management --
function token() external returns (IERC20);
function deposit(uint256 _amount) external;
function withdraw(uint256 _amount) external;
// -- Allowed Funds Destinations --
function addTokenDestination(address _dst) external;
function removeTokenDestination(address _dst) external;
function isTokenDestination(address _dst) external view returns (bool);
function getTokenDestinations() external view returns (address[] memory);
// -- Function Call Authorization --
function setAuthFunctionCall(string calldata _signature, address _target) external;
function unsetAuthFunctionCall(string calldata _signature) external;
function setAuthFunctionCallMany(string[] calldata _signatures, address[] calldata _targets) external;
function getAuthFunctionCallTarget(bytes4 _sigHash) external view returns (address);
function isAuthFunctionCall(bytes4 _sigHash) external view returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../GSN/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Helper to make usage of the `CREATE2` EVM opcode easier and safer.
* `CREATE2` can be used to compute in advance the address where a smart
* contract will be deployed, which allows for interesting new mechanisms known
* as 'counterfactual interactions'.
*
* See the https://eips.ethereum.org/EIPS/eip-1014#motivation[EIP] for more
* information.
*/
library Create2 {
/**
* @dev Deploys a contract using `CREATE2`. The address where the contract
* will be deployed can be known in advance via {computeAddress}.
*
* The bytecode for a contract can be obtained from Solidity with
* `type(contractName).creationCode`.
*
* Requirements:
*
* - `bytecode` must not be empty.
* - `salt` must have not been used for `bytecode` already.
* - the factory must have a balance of at least `amount`.
* - if `amount` is non-zero, `bytecode` must have a `payable` constructor.
*/
function deploy(uint256 amount, bytes32 salt, bytes memory bytecode) internal returns (address) {
address addr;
require(address(this).balance >= amount, "Create2: insufficient balance");
require(bytecode.length != 0, "Create2: bytecode length is zero");
// solhint-disable-next-line no-inline-assembly
assembly {
addr := create2(amount, add(bytecode, 0x20), mload(bytecode), salt)
}
require(addr != address(0), "Create2: Failed on deploy");
return addr;
}
/**
* @dev Returns the address where a contract will be stored if deployed via {deploy}. Any change in the
* `bytecodeHash` or `salt` will result in a new destination address.
*/
function computeAddress(bytes32 salt, bytes32 bytecodeHash) internal view returns (address) {
return computeAddress(salt, bytecodeHash, address(this));
}
/**
* @dev Returns the address where a contract will be stored if deployed via {deploy} from a contract located at
* `deployer`. If `deployer` is this contract's address, returns the same value as {computeAddress}.
*/
function computeAddress(bytes32 salt, bytes32 bytecodeHash, address deployer) internal pure returns (address) {
bytes32 _data = keccak256(
abi.encodePacked(bytes1(0xff), deployer, salt, bytecodeHash)
);
return address(uint256(_data));
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <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 GSN 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 payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.3;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
interface IGraphTokenLock {
enum Revocability { NotSet, Enabled, Disabled }
// -- Balances --
function currentBalance() external view returns (uint256);
// -- Time & Periods --
function currentTime() external view returns (uint256);
function duration() external view returns (uint256);
function sinceStartTime() external view returns (uint256);
function amountPerPeriod() external view returns (uint256);
function periodDuration() external view returns (uint256);
function currentPeriod() external view returns (uint256);
function passedPeriods() external view returns (uint256);
// -- Locking & Release Schedule --
function availableAmount() external view returns (uint256);
function vestedAmount() external view returns (uint256);
function releasableAmount() external view returns (uint256);
function totalOutstandingAmount() external view returns (uint256);
function surplusAmount() external view returns (uint256);
// -- Value Transfer --
function release() external;
function withdrawSurplus(uint256 _amount) external;
function revoke() external;
}