// SPDX-License-Identifier: MIT
pragma solidity =0.8.4;
/**
* @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);
}
/**
* @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);
}
/**
* @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);
}
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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/*
* @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;
}
}
/**
* @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 guidelines: functions revert instead
* of 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;
uint8 private _decimals;
/**
* @dev Sets the values for {name}, {symbol} and {desimals}.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_, uint8 decimals_) {
_name = name_;
_symbol = symbol_;
_decimals = decimals_;
}
/**
* @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`).
*
* 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 _decimals;
}
/**
* @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);
}
/** @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);
}
/**
* @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);
}
/**
* @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 to 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 {}
}
/**
* @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 validate(IERC20 token) internal view {
require(address(token).isContract(), "SafeERC20: not a contract");
}
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 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");
}
}
}
struct User {
uint256 totalOriginalTaken;
uint256 lastUpdateTick;
uint256 goldenBalance;
uint256 cooldownAmount;
uint256 cooldownTick;
}
library UserLib {
function addCooldownAmount(User storage _user, uint256 _currentTick, uint256 _amount) internal {
if(_user.cooldownTick == _currentTick) {
_user.cooldownAmount += _amount;
} else {
_user.cooldownTick = _currentTick;
_user.cooldownAmount = _amount;
}
}
}
struct Vesting {
uint256 totalAmount;
uint256 startBlock;
uint256 endBlock;
}
library VestingLib {
function validate(Vesting storage _vesting) internal view {
require(_vesting.totalAmount > 0, "zero total vesting amount");
require(_vesting.startBlock < _vesting.endBlock, "invalid vesting blocks");
}
function isInitialized(Vesting storage _vesting) internal view returns (bool) {
return _vesting.endBlock > 0;
}
function currentTick(Vesting storage _vesting) internal view returns (uint256) {
if(_vesting.endBlock == 0) return 0; // vesting is not yet initialized
if(block.number < _vesting.startBlock) return 0;
if(block.number > _vesting.endBlock) {
return _vesting.endBlock - _vesting.startBlock + 1;
}
return block.number - _vesting.startBlock + 1;
}
function lastTick(Vesting storage _vesting) internal view returns (uint256) {
return _vesting.endBlock - _vesting.startBlock;
}
function unlockAtATickAmount(Vesting storage _vesting) internal view returns (uint256) {
return _vesting.totalAmount / (_vesting.endBlock - _vesting.startBlock);
}
}
struct Price {
address asset;
uint256 value;
}
contract DeferredVestingPool is ERC20 {
using SafeERC20 for IERC20;
using SafeERC20 for IERC20Metadata;
using UserLib for User;
using VestingLib for Vesting;
bool public isSalePaused_;
address public admin_;
address public revenueOwner_;
IERC20Metadata public originalToken_;
address public originalTokenOwner_;
uint256 public precisionDecimals_;
mapping(address => User) public users_;
mapping(address => uint256) public assets_;
Vesting public vesting_;
string private constant ERR_AUTH_FAILED = "auth failed";
event WithdrawCoin(address indexed msgSender, bool isMsgSenderAdmin, address indexed to, uint256 amount);
event WithdrawOriginalToken(address indexed msgSender, bool isMsgSenderAdmin, address indexed to, uint256 amount);
event SetPrice(address indexed asset, uint256 price);
event PauseCollateralizedSale(bool on);
event SetRevenueOwner(address indexed msgSender, address indexed newRevenueOwner);
event SetOriginalTokenOwner(address indexed msgSender, address indexed newOriginalTokenOwner);
event SwapToCollateralized(address indexed msgSender, address indexed fromAsset, uint256 fromAmount, uint256 toAmount, uint32 indexed refCode);
event SwapCollateralizedToOriginal(address indexed msgSender, uint256 amount);
constructor(
string memory _name,
string memory _symbol,
address _admin,
address _revenueOwner,
IERC20Metadata _originalToken,
address _originalTokenOwner,
uint256 _precisionDecimals,
Price[] memory _prices) ERC20(_name, _symbol, _originalToken.decimals()) {
_originalToken.validate();
admin_ = _admin;
revenueOwner_ = _revenueOwner;
originalToken_ = _originalToken;
originalTokenOwner_ = _originalTokenOwner;
precisionDecimals_ = _precisionDecimals;
emit SetRevenueOwner(_msgSender(), _revenueOwner);
emit SetOriginalTokenOwner(_msgSender(), _originalTokenOwner);
for(uint32 i = 0; i < _prices.length; ++i) {
assets_[_prices[i].asset] = _prices[i].value;
emit SetPrice(_prices[i].asset, _prices[i].value);
}
emit PauseCollateralizedSale(false);
}
function totalOriginalBalance() external view returns (uint256) {
return originalToken_.balanceOf(address(this));
}
function availableForSellCollateralizedAmount() public view returns (uint256) {
if(isSalePaused_) return 0;
if(vesting_.isInitialized()) return 0;
return originalToken_.balanceOf(address(this)) - totalSupply();
}
function unusedCollateralAmount() public view returns (uint256) {
return originalToken_.balanceOf(address(this)) - totalSupply();
}
modifier onlyAdmin() {
require(admin_ == _msgSender(), ERR_AUTH_FAILED);
_;
}
function initializeVesting(uint256 _startBlock, uint256 _endBlock) external onlyAdmin {
require(!vesting_.isInitialized(), "already initialized");
vesting_.totalAmount = totalSupply();
vesting_.startBlock = _startBlock;
vesting_.endBlock = _endBlock;
vesting_.validate();
}
function withdrawCoin(uint256 _amount) external onlyAdmin {
_withdrawCoin(payable(revenueOwner_), _amount);
}
function withdrawOriginalToken(uint256 _amount) external onlyAdmin {
_withdrawOriginalToken(originalTokenOwner_, _amount);
}
function setPrices(Price[] calldata _prices) external onlyAdmin {
for(uint32 i = 0; i < _prices.length; ++i) {
assets_[_prices[i].asset] = _prices[i].value;
emit SetPrice(_prices[i].asset, _prices[i].value);
}
}
function pauseCollateralizedSale(bool _on) external onlyAdmin {
require(isSalePaused_ != _on);
isSalePaused_ = _on;
emit PauseCollateralizedSale(_on);
}
modifier onlyRevenueOwner() {
require(revenueOwner_ == _msgSender(), ERR_AUTH_FAILED);
_;
}
function setRevenueOwner(address _newRevenueOwner) external onlyRevenueOwner {
revenueOwner_ = _newRevenueOwner;
emit SetRevenueOwner(_msgSender(), _newRevenueOwner);
}
function withdrawCoin(address payable _to, uint256 _amount) external onlyRevenueOwner {
_withdrawCoin(_to, _amount);
}
modifier onlyOriginalTokenOwner() {
require(originalTokenOwner_ == _msgSender(), ERR_AUTH_FAILED);
_;
}
function setOriginalTokenOwner(address _newOriginalTokenOwner) external onlyOriginalTokenOwner {
originalTokenOwner_ = _newOriginalTokenOwner;
emit SetOriginalTokenOwner(_msgSender(), _newOriginalTokenOwner);
}
function withdrawOriginalToken(address _to, uint256 _amount) external onlyOriginalTokenOwner {
_withdrawOriginalToken(_to, _amount);
}
function _withdrawCoin(address payable _to, uint256 _amount) private {
if(_amount == 0) {
_amount = address(this).balance;
}
_to.transfer(_amount);
emit WithdrawCoin(_msgSender(), _msgSender() == admin_, _to, _amount);
}
function _withdrawOriginalToken(address _to, uint256 _amount) private {
uint256 maxWithdrawAmount = unusedCollateralAmount();
if(_amount == 0) {
_amount = maxWithdrawAmount;
}
require(_amount > 0, "zero withdraw amount");
require(_amount <= maxWithdrawAmount, "invalid withdraw amount");
originalToken_.safeTransfer(_to, _amount);
emit WithdrawOriginalToken(_msgSender(), _msgSender() == admin_, _to, _amount);
}
function calcCollateralizedPrice(address _fromAsset, uint256 _fromAmount) public view
returns (uint256 toActualAmount_, uint256 fromActualAmount_) {
require(_fromAmount > 0, "zero payment");
uint256 fromAssetPrice = assets_[_fromAsset];
require(fromAssetPrice > 0, "asset not supported");
if(isSalePaused_) return (0, 0);
uint256 toAvailableForSell = availableForSellCollateralizedAmount();
uint256 oneOriginalToken = 10 ** originalToken_.decimals();
fromActualAmount_ = _fromAmount;
toActualAmount_ = (_fromAmount * oneOriginalToken) / fromAssetPrice;
if(toActualAmount_ > toAvailableForSell) {
toActualAmount_ = toAvailableForSell;
fromActualAmount_ = (toAvailableForSell * fromAssetPrice) / oneOriginalToken;
}
}
function swapCoinToCollateralized(uint256 _toExpectedAmount, uint32 _refCode) external payable {
_swapToCollateralized(address(0), msg.value, _toExpectedAmount, _refCode);
}
function swapTokenToCollateralized(IERC20 _fromAsset, uint256 _fromAmount, uint256 _toExpectedAmount, uint32 _refCode) external {
require(address(_fromAsset) != address(0), "wrong swap function");
uint256 fromAmount = _fromAmount == 0 ? _fromAsset.allowance(_msgSender(), address(this)) : _fromAmount;
_fromAsset.safeTransferFrom(_msgSender(), revenueOwner_, fromAmount);
_swapToCollateralized(address(_fromAsset), fromAmount, _toExpectedAmount, _refCode);
}
function _swapToCollateralized(address _fromAsset, uint256 _fromAmount, uint256 _toExpectedAmount, uint32 _refCode) private {
require(!isSalePaused_, "swap paused");
require(!vesting_.isInitialized(), "can't do this after vesting init");
require(_toExpectedAmount > 0, "zero expected amount");
(uint256 toActualAmount, uint256 fromActualAmount) = calcCollateralizedPrice(_fromAsset, _fromAmount);
toActualAmount = _fixAmount(toActualAmount, _toExpectedAmount);
require(_fromAmount >= fromActualAmount, "wrong payment amount");
_mint(_msgSender(), toActualAmount);
emit SwapToCollateralized(_msgSender(), _fromAsset, _fromAmount, toActualAmount, _refCode);
}
function _fixAmount(uint256 _actual, uint256 _expected) private view returns (uint256) {
if(_expected < _actual) return _expected;
require(_expected - _actual <= 10 ** precisionDecimals_, "expected amount mismatch");
return _actual;
}
function collateralizedBalance(address _userAddr) external view
returns (
uint256 blockNumber,
uint256 totalOriginalTakenAmount,
uint256 totalCollateralizedAmount,
uint256 goldenAmount,
uint256 grayAmount,
uint256 cooldownAmount) {
uint256 currentTick = vesting_.currentTick();
blockNumber = block.number;
totalOriginalTakenAmount = users_[_userAddr].totalOriginalTaken;
totalCollateralizedAmount = balanceOf(_userAddr);
goldenAmount = users_[_userAddr].goldenBalance + _calcNewGoldenAmount(_userAddr, currentTick);
grayAmount = totalCollateralizedAmount - goldenAmount;
cooldownAmount = _getCooldownAmount(users_[_userAddr], currentTick);
}
function swapCollateralizedToOriginal(uint256 _amount) external {
address msgSender = _msgSender();
_updateUserGoldenBalance(msgSender, vesting_.currentTick());
User storage user = users_[msgSender];
if(_amount == 0) _amount = user.goldenBalance;
require(_amount > 0, "zero swap amount");
require(_amount <= user.goldenBalance, "invalid amount");
user.totalOriginalTaken += _amount;
user.goldenBalance -= _amount;
_burn(msgSender, _amount);
originalToken_.safeTransfer(msgSender, _amount);
emit SwapCollateralizedToOriginal(msgSender, _amount);
}
function _beforeTokenTransfer(address _from, address _to, uint256 _amount) internal virtual override {
// mint or burn
if(_from == address(0) || _to == address(0)) return;
uint256 currentTick = vesting_.currentTick();
_updateUserGoldenBalance(_from, currentTick);
_updateUserGoldenBalance(_to, currentTick);
User storage userTo = users_[_to];
User storage userFrom = users_[_from];
uint256 fromGoldenAmount = userFrom.goldenBalance;
uint256 fromGrayAmount = balanceOf(_from) - fromGoldenAmount;
// change cooldown amount of sender
if(fromGrayAmount > 0
&& userFrom.cooldownTick == currentTick
&& userFrom.cooldownAmount > 0) {
if(_getCooldownAmount(userFrom, currentTick) > _amount) {
userFrom.cooldownAmount -= _amount;
} else {
userFrom.cooldownAmount = 0;
}
}
if(_amount > fromGrayAmount) { // golden amount is also transfered
uint256 transferGoldenAmount = _amount - fromGrayAmount;
//require(transferGoldenAmount <= fromGoldenAmount, "math error");
userTo.addCooldownAmount(currentTick, fromGrayAmount);
userFrom.goldenBalance -= transferGoldenAmount;
userTo.goldenBalance += transferGoldenAmount;
} else { // only gray amount is transfered
userTo.addCooldownAmount(currentTick, _amount);
}
}
function _updateUserGoldenBalance(address _userAddr, uint256 _currentTick) private {
if(_currentTick == 0) return;
User storage user = users_[_userAddr];
if(user.lastUpdateTick == vesting_.lastTick()) return;
user.goldenBalance += _calcNewGoldenAmount(_userAddr, _currentTick);
user.lastUpdateTick = _currentTick;
}
function _calcNewGoldenAmount(address _userAddr, uint256 _currentTick) private view returns (uint256) {
if(_currentTick == 0) return 0;
User storage user = users_[_userAddr];
if(user.goldenBalance == balanceOf(_userAddr)) return 0;
if(_currentTick >= vesting_.lastTick()) {
return balanceOf(_userAddr) - user.goldenBalance;
}
uint256 result = balanceOf(_userAddr) - _getCooldownAmount(user, _currentTick) + user.totalOriginalTaken;
result *= _currentTick - user.lastUpdateTick;
result *= vesting_.unlockAtATickAmount();
result /= vesting_.totalAmount;
result = _min(result, balanceOf(_userAddr) - user.goldenBalance);
return result;
}
function _getCooldownAmount(User storage _user, uint256 _currentTick) private view returns (uint256) {
if(_currentTick >= vesting_.lastTick()) return 0;
return _currentTick == _user.cooldownTick ? _user.cooldownAmount : 0;
}
function _min(uint256 a, uint256 b) private pure returns (uint256) {
return a <= b ? a : b;
}
}
{
"compilationTarget": {
"DeferredVestingPool.sol": "DeferredVestingPool"
},
"evmVersion": "istanbul",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": []
}
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Amount","type":"uint256"},{"internalType":"uint256","name":"cooldownAmount","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_startBlock","type":"uint256"},{"internalType":"uint256","name":"_endBlock","type":"uint256"}],"name":"initializeVesting","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"isSalePaused_","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"originalTokenOwner_","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"originalToken_","outputs":[{"internalType":"contract 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