// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://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 functionCallWithValue(target, data, 0, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 amount
) external returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "IERC20.sol";
/**
* @title Shared interface
* @notice Holds structs needed by other interfaces
*/
interface IShared {
/**
* @dev SchnorrSECP256K1 requires that each key has a public key part (x coordinate),
* a parity for the y coordinate (0 if the y ordinate of the public key is even, 1
* if it's odd)
*/
struct Key {
uint256 pubKeyX;
uint8 pubKeyYParity;
}
/**
* @dev Contains a signature and the nonce used to create it. Also the recovered address
* to check that the signature is valid
*/
struct SigData {
uint256 sig;
uint256 nonce;
address kTimesGAddress;
}
/**
* @param token The address of the token to be transferred
* @param recipient The address of the recipient of the transfer
* @param amount The amount to transfer, in wei (uint)
*/
struct TransferParams {
address token;
address payable recipient;
uint256 amount;
}
/**
* @param swapID The unique identifier for this swap (bytes32), used for create2
* @param token The token to be transferred
*/
struct DeployFetchParams {
bytes32 swapID;
address token;
}
/**
* @param fetchContract The address of the deployed Deposit contract
* @param token The token to be transferred
*/
struct FetchParams {
address payable fetchContract;
address token;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "SafeERC20.sol";
interface ITokenVestingNoStaking {
event TokensReleased(IERC20 indexed token, uint256 amount);
event TokenVestingRevoked(IERC20 indexed token, uint256 refund);
event BeneficiaryTransferred(address oldBeneficiary, address newBeneficiary);
event RevokerTransferred(address oldRevoker, address newRevoker);
//////////////////////////////////////////////////////////////
// //
// State-changing functions //
// //
//////////////////////////////////////////////////////////////
function release(IERC20 token) external;
function revoke(IERC20 token) external;
function transferBeneficiary(address beneficiary_) external;
function transferRevoker(address revoker_) external;
//////////////////////////////////////////////////////////////
// //
// Non-state-changing functions //
// //
//////////////////////////////////////////////////////////////
function getBeneficiary() external view returns (address);
function getRevoker() external view returns (address);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "IERC20.sol";
import "draft-IERC20Permit.sol";
import "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));
}
}
function safePermit(
IERC20Permit token,
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) internal {
uint256 nonceBefore = token.nonces(owner);
token.permit(owner, spender, value, deadline, v, r, s);
uint256 nonceAfter = token.nonces(owner);
require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
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 "IShared.sol";
/**
* @title Shared contract
* @notice Holds constants and modifiers that are used in multiple contracts
* @dev It would be nice if this could be a library, but modifiers can't be exported :(
*/
abstract contract Shared is IShared {
/// @dev The address used to indicate whether transfer should send native or a token
address internal constant _NATIVE_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
address internal constant _ZERO_ADDR = address(0);
bytes32 internal constant _NULL = "";
uint256 internal constant _E_18 = 1e18;
/// @dev Checks that a uint isn't zero/empty
modifier nzUint(uint256 u) {
require(u != 0, "Shared: uint input is empty");
_;
}
/// @dev Checks that an address isn't zero/empty
modifier nzAddr(address a) {
require(a != _ZERO_ADDR, "Shared: address input is empty");
_;
}
/// @dev Checks that a bytes32 isn't zero/empty
modifier nzBytes32(bytes32 b) {
require(b != _NULL, "Shared: bytes32 input is empty");
_;
}
/// @dev Checks that the pubKeyX is populated
modifier nzKey(Key memory key) {
require(key.pubKeyX != 0, "Shared: pubKeyX is empty");
_;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "Shared.sol";
import "ITokenVestingNoStaking.sol";
import "SafeERC20.sol";
/**
* @title TokenVesting
* @dev A token holder contract that that vests its balance of any ERC20 token to the beneficiary.
* Linear lockup - not stakable. 20% cliff unlocking and 80% linear after that.
* If revoked send all funds to revoker and allow beneficiary to release remaining vested funds.
*
* The vesting schedule is time-based (i.e. using block timestamps as opposed to e.g. block numbers), and
* is therefore sensitive to timestamp manipulation (which is something miners can do, to a certain degree).
* Therefore, it is recommended to avoid using short time durations (less than a minute).
*
*/
contract TokenVestingNoStaking is ITokenVestingNoStaking, Shared {
using SafeERC20 for IERC20;
uint256 public constant CLIFF_DENOMINATOR = 5; // x / 5 = 20% of x
// beneficiary of tokens after they are released. It can be transferrable.
address private beneficiary;
bool public immutable transferableBeneficiary;
// the revoker who can cancel the vesting and withdraw any unvested tokens
address private revoker;
// Durations and timestamps are expressed in UNIX time, the same units as block.timestamp.
uint256 public immutable cliff;
uint256 public immutable end;
mapping(IERC20 => uint256) public released;
bool public revoked;
/**
* @param beneficiary_ address of the beneficiary to whom vested tokens are transferred
* @param revoker_ the person with the power to revoke the vesting. Address(0) means it is not revocable.
* @param cliff_ the unix time of the cliff, nothing withdrawable before this
* @param end_ the unix time of the end of the vesting period, everything withdrawable after
* @param transferableBeneficiary_ whether the beneficiary address can be transferred
*/
constructor(
address beneficiary_,
address revoker_,
uint256 cliff_,
uint256 end_,
bool transferableBeneficiary_
) nzAddr(beneficiary_) {
require(cliff_ <= end_, "Vesting: cliff_ after end_");
require(block.timestamp < cliff_, "Vesting: cliff before current time");
beneficiary = beneficiary_;
revoker = revoker_;
cliff = cliff_;
end = end_;
transferableBeneficiary = transferableBeneficiary_;
}
//////////////////////////////////////////////////////////////
// //
// State-changing functions //
// //
//////////////////////////////////////////////////////////////
/**
* @notice Transfers vested tokens to beneficiary.
* @param token ERC20 token which is being vested.
*/
function release(IERC20 token) external override onlyBeneficiary {
uint256 unreleased = _releasableAmount(token);
require(unreleased > 0, "Vesting: no tokens are due");
released[token] += unreleased;
emit TokensReleased(token, unreleased);
token.safeTransfer(beneficiary, unreleased);
}
/**
* @notice Allows the revoker to revoke the vesting. Tokens already vested remain
* in the contract for the beneficiary to release, the rest are returned
* to the revoker.
* @param token ERC20 token which is being vested.
*/
function revoke(IERC20 token) external override onlyRevoker {
require(!revoked, "Vesting: token revoked");
require(block.timestamp <= end, "Vesting: vesting expired");
uint256 balance = token.balanceOf(address(this));
uint256 unreleased = _releasableAmount(token);
uint256 refund = balance - unreleased;
revoked = true;
token.safeTransfer(revoker, refund);
emit TokenVestingRevoked(token, refund);
}
/**
* @dev Calculates the amount that has already vested but hasn't been released yet.
* @param token ERC20 token which is being vested.
*/
function _releasableAmount(IERC20 token) private view returns (uint256) {
return _vestedAmount(token) - released[token];
}
/**
* @dev Calculates the amount that has already vested.
* @param token ERC20 token which is being vested.
*/
function _vestedAmount(IERC20 token) private view returns (uint256) {
if (block.timestamp < cliff) {
return 0;
}
uint256 currentBalance = token.balanceOf(address(this));
uint256 totalBalance = currentBalance + released[token];
if (block.timestamp >= end || revoked) {
return totalBalance;
} else {
uint256 cliffAmount = totalBalance / CLIFF_DENOMINATOR;
return cliffAmount + ((totalBalance - cliffAmount) * (block.timestamp - cliff)) / (end - cliff);
}
}
/// @dev Allow the beneficiary to be transferred to a new address if needed
function transferBeneficiary(address beneficiary_) external override onlyBeneficiary nzAddr(beneficiary_) {
require(transferableBeneficiary, "Vesting: beneficiary not transferrable");
emit BeneficiaryTransferred(beneficiary, beneficiary_);
beneficiary = beneficiary_;
}
/// @dev Allow the revoker to be transferred to a new address if needed
function transferRevoker(address revoker_) external override onlyRevoker nzAddr(revoker_) {
emit RevokerTransferred(revoker, revoker_);
revoker = revoker_;
}
//////////////////////////////////////////////////////////////
// //
// Non-state-changing functions //
// //
//////////////////////////////////////////////////////////////
/**
* @return the beneficiary address
*/
function getBeneficiary() external view override returns (address) {
return beneficiary;
}
/**
* @return the revoker address
*/
function getRevoker() external view override returns (address) {
return revoker;
}
//////////////////////////////////////////////////////////////
// //
// Modifiers //
// //
//////////////////////////////////////////////////////////////
/**
* @dev Ensure that the caller is the beneficiary address
*/
modifier onlyBeneficiary() {
require(msg.sender == beneficiary, "Vesting: not the beneficiary");
_;
}
/**
* @dev Ensure that the caller is the revoker address
*/
modifier onlyRevoker() {
require(msg.sender == revoker, "Vesting: not the revoker");
_;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*/
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);
}
{
"compilationTarget": {
"TokenVestingNoStaking.sol": "TokenVestingNoStaking"
},
"evmVersion": "paris",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 100
},
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